TWI754447B - Thermal storage electric water heater - Google Patents

Abstract

A heat storage type electric water heater comprises a barrel body, a water inlet pipe, a water outlet pipe, a partition and a heating device, wherein the barrel body has an accommodation chamber; the water inlet pipe and the water outlet pipe are arranged on the barrel body; the chamber is divided into a first chamber and a second chamber, the first chamber is connected to the water inlet pipe and the water outlet pipe; the heating device is arranged in the second chamber, and the heating device comprises a pipe body and a water outlet pipe Electric heating element, the two ends of the pipe body are respectively connected to the first chamber, and the water in the first chamber can enter the inside of the pipe body; the electric heating element is arranged on the pipe wall of the pipe body, and the heat energy generated by the electric heating element passes through the pipe body. The pipe wall is transferred to the inside of the pipe body to heat the water inside the pipe body. Thereby, the effect of water-heat convection in the first chamber is enhanced.

Description

Thermal storage electric water heater

The invention relates to electric water heaters; in particular, it refers to a heat storage type electric water heater.

The conventional thermal storage type electric water heater includes a water storage bucket and an electric heating pipe. The water storage bucket has a chamber inside to hold water. The water storage bucket is provided with a water inlet pipe and a water outlet pipe. The water inlet pipe and the water outlet pipe are connected with each other. The chambers communicate with each other. The electric heating pipe is arranged in the water storage bucket, and the electric heating pipe has electric heating wires inside.

Since hot water is continuously stored in the water storage bucket of the thermal storage electric water heater, it is convenient for users to take hot water at any time, thereby increasing the convenience of life. However, because the electric heating tube of the conventional thermal storage type electric water heater is only immersed in water, and the water in the water storage bucket is only standing, the heat convection effect is not good during the heating process. Therefore, it takes a long time to heat. Let the whole water reach the set temperature. As a result, the heating efficiency of the thermal storage electric water heater cannot be improved.

In view of this, the purpose of the present invention is to provide a thermal storage type electric water heater, which can increase the effect of thermal convection during the heating process.

In order to achieve the above purpose, the present invention provides a heat storage type electric water heater, comprising a barrel body, a water inlet pipe, a water outlet pipe, a partition and a heating device, wherein the barrel body has an accommodation chamber; the inlet pipe The water pipe and the water outlet pipe are respectively arranged on the barrel body; the partition member is arranged on the barrel body and located in the chamber, and the separator divides the chamber into a first chamber and a second chamber, the first chamber A chamber is connected with the water inlet pipe and the water outlet pipe and is used for containing water; the heating device is arranged in the second chamber, the heating device comprises a pipe body and an electric heating element, the pipe body has a first end and a second end, the first end and the second end respectively communicate with the first chamber, so that the water in the first chamber can enter the inside of the pipe body; the electric heating element is arranged on the pipe wall of the pipe body , the heat energy generated by the electric heating element is transmitted to the inside of the pipe body through the pipe wall of the pipe body, so as to heat the water inside the pipe body.

The effect of the present invention is that by connecting the two ends of the tube body with the first chamber and heating the tube body, the heat convection effect in the first chamber can be increased. The second chamber is located in the barrel, and the effect of utilizing the heat energy of the heating device can also be achieved.

〔this invention〕

1: Thermal storage electric water heater

10: barrel

12: Compartment

122: first chamber

124: Second chamber

14: Water inlet pipe

16: Outlet pipe

18: Shell

19: Pedestal

20: Insulation material

22: Dividers

24: Top

26: Body

262: First Surface

264: Second Surface

28: Closures

30: Heating device

32: Tube body

322: First End

324: Second End

34: Electric heating element

342: Nano Carbon Coating

344: Electrodes

36: Power cord

38: Air spacer

40: connecting pipe

402: entry port

42: Low water level detector

44: High water level detector

46: Thermal conductive layer

2: Thermal storage electric water heater

48: connecting pipe

50: Heating device

52: Tube body

502: Electric heating tube

FIG. 1 is a schematic diagram of a thermal storage electric water heater according to a first preferred embodiment of the present invention.

FIG. 2 is a schematic diagram of the heating device of the thermal storage type electric water heater according to the first preferred embodiment of the present invention.

3 is a schematic diagram of a thermal storage electric water heater according to a second preferred embodiment of the present invention.

4 is a schematic diagram of a heating device of a thermal storage electric water heater according to a third preferred embodiment of the present invention.

In order to describe the present invention more clearly, preferred embodiments are given and described in detail with the drawings as follows. 1 and FIG. 2, it is a thermal storage electric water heater 1 according to the first preferred embodiment of the present invention, comprising a barrel 10, a partition 22 and a heating device 30, wherein: The barrel body 10 has a chamber 12 inside, the barrel body of the barrel body 10 is provided with a water inlet pipe 14 and a water outlet pipe 16 , and the water inlet pipe 14 and the water outlet pipe 16 communicate with the chamber 12 . A shell 18 is provided outside the barrel 10 , and a thermal insulation material 20 is provided between the shell 18 and the barrel 10 . A base 19 is provided at the bottom of the casing 18 . The water inlet pipe 14 and the water outlet pipe 16 extend outside the casing 18 . In this embodiment, the position of the water outlet pipe 16 is higher than the position of the water inlet pipe 14 .

The partition 22 is disposed on the barrel 10 and located in the chamber 12 . The partition 22 separates the chamber 12 into a first chamber 122 and a second chamber 124 , and the first chamber 122 communicates with each other. The water inlet pipe and the water outlet pipe 16 . The water injected from the water inlet pipe 14 is contained in the first chamber 122 . The volume of the first chamber 122 is greater than the volume of the second chamber 124 , and the first chamber 122 surrounds the periphery of the second chamber 124 .

The divider 22 has a top portion 24 and a body portion 26 . The top of the body 26 is connected to the top 24 , the bottom of the body 26 is an open end, and the circumference of the bottom of the body 26 is connected to the bottom of the barrel 10 . The partition 22 has a first surface 262 and a second surface 264 opposite to each other, the first surface 262 faces the first chamber 122 , and the second surface 264 faces the second chamber 124 , in this embodiment Among them, the first surface 262 and the second surface 264 are located on the body 26 . The bottom end of the body 26 is provided with a closing member 28 .

The heating device 30 is disposed in the second chamber 124. The heating device 30 includes a tube body 32 and an electric heating element 34. The tube body 32 has a first end 322 and a second end 324. The first end 324 The end 322 and the second end 324 are respectively connected to the first chamber 122, so that the water in the first chamber 122 can enter the inside of the pipe body 32, and the water in the pipe body 32 can flow to the first chamber Room 122. The electric heating element 34 is disposed on the pipe wall of the pipe body 32 . The electric heating element There is an air gap 38 between 34 and this second surface 264, in other words, the electric heating element 34 is not in direct contact with the water.

In this embodiment, the position of the second end 324 of the pipe body 32 is higher than that of the first end 322 , the first end 322 communicates with the first chamber 122 through a connecting pipe 40 , and the connecting pipe 40 passes through Given the bottom of the barrel 10 and the closure 28 , an inlet end 402 of the connecting pipe 40 is positioned lower than the water inlet pipe 14 . The second end 324 passes through the top of the divider 22 and communicates with the first chamber 122 . The second end 324 is located between the water outlet pipe 16 and the water inlet pipe 14 . A part of the water injected into the water inlet pipe 14 flows into the pipe body 32 of the heating device 30 through the connecting pipe 40 and overflows from the second end 324 . Preferably, the water level in the first chamber 122 is higher than the second end 324 .

In practice, a low water level detector 42 and a high water level detector 44 may be provided in the first chamber 122 , and the low water level detector 42 is higher than the water outlet pipe 16 . When the low water level detector 42 detects that the water level is lower than a first predetermined water level, an external water replenishing device (not shown) is triggered, and the water replenishing device injects water into the water inlet pipe 14 until the high water level detector 44 When the water level on the detection side reaches a second predetermined water level, the external water replenishing device stops replenishing water.

In this embodiment, the tube body 32 is made of an electrically insulating material, such as a quartz tube or a ceramic tube, and the electric heating element 34 includes a nanocarbon coating 342 , and the nanocarbon coating 342 is coated on the tube body 32 tube wall, thereby increasing the heating area. Two electrodes 344 are disposed on the nano-carbon coating 342 , and the two electrodes 344 are respectively connected to two power lines 36 , and the two power lines 36 pass through the closure 28 . The tube body 32 isolates the nanocarbon coating 342 from the water inside the tube body 32 , so as to prevent the nanocarbon coating 342 from contacting with water, so as to avoid the concern of electric leakage.

When the two power lines 36 are energized, the electric heating element 34 generates heat energy, and the generated heat energy is transferred to the inside of the pipe body 32 through the pipe wall of the pipe body 32 to heat the water inside the pipe body 32 . After the water inside the pipe body 32 is heated, it flows upward. Since the tube body 32 is The second end 324 is closer to the water outlet pipe 16, and the position of the water outlet pipe 16 is higher than the water inlet pipe 14. Therefore, the water temperature above the second end 324 is higher, and the hotter water in the first chamber 122 flows through convection. It flows downward to form a circulation without additional auxiliary convection devices. Even if cold water is injected into the first chamber 122 through the water inlet pipe 14, the cold water is also brought into the pipe body 32 and heated to form hot water. In other words, during the heating process, the pipe body 32 can promote the effect of water-heat convection in the first chamber 122 .

The thermal energy of the electric heating element 34 can also be transferred into the first chamber 122 via the partition 22 . In this embodiment, a thermally conductive layer 46 may be selectively disposed on the second surface 264 , and the thermally conductive layer 46 faces the electric heating element 34 . Preferably, the thermally conductive layer 46 is a nanocarbon coating. With the heat-conducting layer 46 , the conductivity of the heat energy of the electric heating element 34 to the separator 22 can be increased, and the heat energy of the electric heating element 34 can be effectively utilized. The sealing member 28 can also prevent the heat energy in the second chamber 124 from dissipating from the bottom end.

FIG. 3 shows a thermal storage electric water heater 2 according to a second preferred embodiment of the present invention, which has substantially the same structure as the first embodiment, except that the first end 322 of the pipe body 32 is connected to the first end 322 of the first embodiment. A connecting tube 48 of a chamber 122 passes through the body 26 of the partition 22 . In this way, the purpose of injecting the water in the first chamber 122 into the pipe body 32 can also be achieved.

FIG. 4 shows a heating device 50 for a thermal storage electric water heater according to a third preferred embodiment of the present invention. Different from the foregoing embodiments, the electric heating element of the heating device 50 is an electric heating tube 502. The electric heating tube 502 Surrounding the tube body 52 in a spiral manner can increase the heating area. After the electric heating pipe 502 is energized, the heat energy can also be transferred to the inside of the pipe body 52 through the pipe wall of the pipe body 52 to heat the water inside the pipe body 52 . The electric heating pipe 502 may include electric heating wires, and the pipe body 52 may be made of metal material.

In one embodiment, the electric heating tube 502 may also include an induction coil to heat the metal tube body 52 .

According to the above, the thermal storage type electric water heater of the present invention can increase the heat convection effect in the first chamber during the heating process by communicating the two ends of the pipe body with the first chamber. The second chamber is located in the barrel, and the effect of utilizing the heat energy of the heating device can also be achieved. The electric heating element and the water are isolated by the pipe body, which can also achieve the purpose of avoiding electric leakage.

The above descriptions are only preferred feasible embodiments of the present invention, and any equivalent changes made by applying the description of the present invention and the scope of the patent application should be included in the patent scope of the present invention.

1: Thermal storage electric water heater

10: barrel

12: Compartment

122: first chamber

124: Second chamber

14: Water inlet pipe

16: Outlet pipe

18: Shell

19: Pedestal

20: Insulation material

22: Dividers

24: Top

26: Body

262: First Surface

264: Second Surface

28: Closures

30: Heating device

32: Tube body

322: First End

324: Second End

34: Electric heating element

36: Power cord

38: Air spacer

40: connecting pipe

402: entry port

42: Low water level detector

44: High water level detector

46: Thermal conductive layer

Claims (14)

A thermal storage type electric water heater, comprising: a barrel with a chamber; A water inlet pipe and a water outlet pipe are respectively arranged on the barrel body; A partition is disposed on the barrel and located in the chamber, the partition divides the chamber into a first chamber and a second chamber, and the first chamber communicates with the water inlet pipe and the water outlet pipe and for containing water; At least one heating device is arranged in the second chamber, the heating device includes a tube body and an electric heating element, the tube body has a first end and a second end, the first end and the second end are respectively The first chamber is communicated so that the water in the first chamber can enter the inside of the pipe body; the electric heating element is arranged on the pipe wall of the pipe body, and the heat energy generated by the electric heating element passes through the pipe wall of the pipe body It is transferred to the inside of the pipe body to heat the water inside the pipe body. The thermal storage type electric water heater as claimed in claim 1, wherein the pipe body is made of an electrically insulating material; the electric heating element comprises a nano-carbon coating, and the nano-carbon coating is coated on the pipe wall of the pipe body. The thermal storage electric water heater as claimed in claim 1, wherein the position of the second end of the pipe body is higher than the position of the first end, and the first end is closer to the water inlet pipe than the second end. The thermal storage electric water heater according to claim 3, wherein the position of the water outlet pipe is higher than the position of the water inlet pipe, and the position of the second end is between the water outlet pipe and the water inlet pipe. The thermal storage electric water heater as claimed in claim 3, wherein the first end communicates with the first chamber through a connecting pipe, and an inlet end of the connecting pipe is located lower than the water inlet pipe. The thermal storage electric water heater according to claim 5, wherein the connecting pipe penetrates the bottom of the barrel. The thermal storage type electric water heater according to claim 5, wherein the connecting pipe passes through the partition. The thermal storage electric water heater as claimed in claim 1, wherein the partition has a first surface and a second surface opposite to each other, the first surface faces the first chamber, and the second surface faces the first surface Two chambers with air space between the second surface and the electric heating element. The thermal storage electric water heater as claimed in claim 8, wherein the thermal energy of the electric heating element is transferred into the first chamber through the partition. The thermal storage-type electric water heater as claimed in claim 9, wherein a heat-conducting layer is disposed on the second surface, and the heat-conducting layer corresponds to the electric heating element. The thermal storage electric water heater as claimed in claim 10, wherein the thermally conductive layer is a nano-carbon coating. The thermal storage electric water heater as claimed in claim 1, wherein the partition has a top and a body, the top of the body is connected to the top, the bottom of the body is an open end, and the bottom of the body is connected to the top. The bottom of the barrel is connected, and the second chamber is formed between the top and the body. The thermal storage-type electric water heater as claimed in claim 12, wherein the bottom end of the body is provided with a closure. The thermal storage electric water heater as claimed in claim 1, wherein the first chamber surrounds the periphery of the second chamber.

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