Dry-burning-resistant heating tube assembly and electric water heater

Abstract

An anti-dry heating tube assembly comprises a heating tube, a temperature detection blind tube and a flange plate, the heating tube and the temperature detection blind tube are respectively arranged on the flange plate in a penetrating mode, a temperature controller is arranged in the temperature detection blind tube, and the anti-dry heating tube assembly further comprises a ceramic heat insulation plate and a connecting piece. The ceramic heat insulation plate is installed on the heating pipe through the connecting piece so as to block heat of the heating pipe. Compared with the prior art, the technical scheme provided by the utility model has the advantages that high temperature can be blocked to prevent the inner container from being damaged, the whole structure is stable, power supply to the heating pipe is prevented from being cut off lagging, and the dry burning prevention effect is good.

Description

Technical Field

[0001] The utility model relates to the field of anti-dry burning of electric water heaters, in particular to an anti-dry burning heating tube assembly and an electric water heater. Background Technique

[0002] At present, the storage-type electric water heaters on the market all use heating tubes to heat and use temperature-sensing tubes to monitor the temperature in the inner tank. When dry burning occurs, the heating tube continuously heats, causing the temperature in the inner tank to quickly rise to an extremely high level (sometimes up to 310 °C). After the temperature-sensing tube senses overheating, it will cut off the power supply of the heating tube through the controller and stop continuous heating, so as to achieve the purpose of preventing dry burning. However, in the existing anti-dry burning measures of electric water heaters, there is often a situation where the temperature of the inner tank rises continuously by the heating tube for a long time (usually after 2 minutes) before it is transmitted to the temperature-sensing tube, resulting in a lag in the cut-off action. Therefore, it is very likely that the inner wall of the inner tank will be damaged due to high temperature. Especially when the inner tank is made of plastic material, it may cause the inner tank to melt and be damaged or even explode, with a very high risk factor.

[0003] Therefore, it is urgent to develop an anti-dry burning heating tube assembly that can prevent the inner tank from being damaged by the high temperature of the heating tube and can quickly cut off the continuous heating of the heating tube without lag. For example, the Chinese utility model patent with the authorization announcement number CN2255017 and the title of electric water heater discloses: a barrel body composed of a shell (1), a heat insulation layer (2), and an inner tank (3). A heating tube (5), a temperature-sensing tube (4), a temperature controller (7), and inlet and outlet water pipes (9) are installed in the barrel body. A dry-burning temperature-sensitive piece (12) is installed at the bottom of the heating tube (5). The lower bottom surface of the dry-burning temperature-sensitive piece (12) is attached to the inner surface of the flange (6). A dry-burning temperature controller is installed at the corresponding position on the outer surface of the flange (6). In the technical solution of this utility model, the temperature is quickly transmitted to the anti-dry burning temperature controller (8) through the dry-burning temperature-sensitive piece (12) connected to the heating tube (5) to stop the heating tube from heating after reaching the limit temperature. Therefore, the dry-burning temperature-sensitive piece (12) in this utility model only serves to accelerate the cut-off of the temperature controller and cannot prevent the inner tank from being damaged by the high temperature of the heating tube.

[0004] For another example, the Chinese utility model patent with the authorization announcement number CN2718455Y and the title of a heating tube assembly for a storage type electric water heater discloses the following: It includes a heating tube (1), a water temperature detecting tube (2), a flange port (3), and a terminal (4). The tails of the heating tube (1) and the water temperature detecting tube (2) are installed on the flange port (3). A terminal (4) is installed at the tail end of the heating tube (1). A water temperature sensing probe (5) is provided inside the water temperature detecting tube (2). It further includes a tube temperature detecting tube (6) and a heat conducting sheet (7). The tail of the tube temperature detecting tube (6) is installed on the flange port (3). A tube temperature sensing probe (8) is provided inside the tube temperature detecting tube (6). The heating tube (1) and the tube temperature detecting tube (6) are connected by the heat conducting sheet (7), and the heat conducting sheet (7) wraps around the surfaces of the heating tube (1) and the tube temperature detecting tube (6). In the technical solution of this utility model, the controller can no longer make a lagging reaction to cut off the power supply of the heating tube through the heat conducting sheet (7) provided between the heating tube (1) and the tube temperature detecting tube (6), which reduces the harm of the high temperature of the heating tube to a certain extent, but still cannot play a role in blocking high temperature.

[0005] For another example, the Chinese utility model patent with the authorization announcement number CN202297221U and the title of a silver ion antibacterial and disinfection electric water heater discloses the following: It includes a housing (1), an inner tank (2) fixed in the housing (1) for storing water and keeping it warm, a heating tube (3), a magnesium rod (4), a water inlet pipe (5), and a water outlet pipe (6) fixed in the inner tank (2). A bactericidal ceramic sheet (7) that releases silver ions and electromagnetic waves is provided inside the inner tank (2). The bactericidal ceramic sheet (7) is fixed on the heating tube (3). The bactericidal ceramic sheet (7) in the technical solution of this utility model is mainly used for sterilization, and the connection method between the bactericidal ceramic sheet (7) and the heating tube (3) is not further disclosed. More importantly, no technical features beneficial to heat insulation are disclosed for the bactericidal ceramic sheet (7) in this utility model.

[0006] Finally, the Chinese utility model patent with the authorization announcement number CN215113219 and the title of "An Electric Heating Component with a Water Treatment Material Container and an Electric Water Heater" discloses: including an end cover for installation on the side of the electric water heater, an electric heating tube, and a water quality treatment mechanism with water quality treatment function. The electric heating tube includes a connecting section and a main section. The connecting section is fixed to the end cover, and one end of the connecting section away from the end cover is connected to the main section. The water quality treatment mechanism is fixed to the main section. The water quality treatment mechanism includes a main body and a connecting member. A cavity for storing water treatment materials is provided inside the main body. The main body is provided with a plurality of through holes, and the through holes are communicated with the cavity. The main body is fixedly connected to the electric heating tube through the connecting member. The connecting member includes a fixing bracket and a clamping bracket. The fixing bracket is fixedly connected to the main body, and the fixing bracket and the clamping bracket are fixedly connected and clamp the electric heating tube to realize the fixed connection between the main body and the electric heating tube. Similarly, the technical solution of this utility model only discloses the water quality treatment effect of the water treatment mechanism and does not involve the technical feature of blocking high temperature. Summary of the Utility Model

[0007] Aiming at the deficiencies of the prior art, the utility model provides an anti-dry burning heating tube assembly and an electric water heater that can block high temperature to prevent damage to the inner tank, have a stable overall structure, avoid cutting off the power supply to the heating tube laggingly, and have a good anti-dry burning effect.

[0008] The utility model mainly adopts the following technical solutions:

[0009] An anti-dry burning heating tube assembly includes a heating tube, a temperature sensing blind tube, and a flange. The heating tube and the temperature sensing blind tube are respectively passed through the flange. A thermostat is arranged in the temperature sensing blind tube. It further includes a ceramic heat insulation plate and a connecting member. The ceramic heat insulation plate is installed on the heating tube through the connecting member to block the heat of the heating tube.

[0010] Wherein, the ceramic heat insulation plate includes a plate body. The plate body is formed with an installation groove penetrating along the length direction of the plate body. The longitudinal section of the installation groove is triangular. The connecting member includes a clamping foot, and the clamping foot is in a fish-tail shape. The clamping foot is inserted into the installation groove.

[0011] Wherein, the installation grooves are located at the two side edges of the plate body.

[0012] Wherein, the longitudinal section of the plate body is a flattened Ω shape.

[0013] Wherein, the ceramic heat insulation plate further includes a strengthening part, and the strengthening part is connected along the length direction of the plate body to the middle part of the plate body on the side opposite to the installation groove.

[0014] Among them, the strengthening part includes a long strip plate, and the long strip plate is arranged to equally divide the middle part of the plate body at equal intervals.

[0015] Among them, the connecting piece further includes a clamping head, and the clamping head includes two arc-shaped clamping strips arranged oppositely, and the heating tube is installed between the oppositely arranged arc-shaped clamping strips.

[0016] Among them, the top end of the arc-shaped clamping strip is bent and extends upward to form a mating piece.

[0017] Among them, the heating tube and the temperature detecting blind tube are connected by a heat conducting member.

[0018] Among them, the ceramic heat insulation plate is also loaded with water treatment materials.

[0019] An electric water heater adopts the above anti-dry burning heating tube assembly.

[0020] Among them, it includes an inner tank with a tank opening, the flange is covered on the circumferential edge of the tank opening, and the ceramic heat insulation plate extends horizontally near the bottom wall of the inner tank and is located between the heating tube and the bottom wall of the inner tank.

[0021] According to the technical solution of the present invention, the following beneficial effects are achieved: The ceramic heat insulation plate is connected to the heating tube by a connecting piece. The ceramic heat insulation plate itself has a low cost, and it is more convenient for production configuration and subsequent installation to be connected to the heating tube by a connecting piece; the ceramic heat insulation plate is installed by the cooperation of the installation groove on the plate body and the clamping feet of the connecting piece, and the structure is simple and convenient for installation. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of the anti-dry burning heating tube assembly in this application.

[0023] Figure 2 It is Figure 1 A schematic side view of the anti-dry burning heating tube assembly in

[0024] Figure 3 It is a schematic structural diagram of the ceramic heat insulation plate installed with a connecting piece.

[0025] Figure 4 It is a schematic structural diagram of the connecting piece.

[0026] Figure 5 It is a schematic structural diagram of an electric water heater installed with an anti-dry burning heating tube assembly.

[0027] 1 Heating tube, 2 Temperature detecting blind tube, 3 Flange, 4 Ceramic heat insulation plate, 41 Plate body, 42 Strengthening part, 5 Connecting piece, 51 Clamping feet, 52 Clamping head, 521 Arc-shaped clamping strip, 5211 Mating piece, 6 Heat conducting member, K Inner tank. Detailed Embodiment

[0028] The technical solution of the present utility model will be further described below in conjunction with the accompanying drawings:

[0029] See Figures 1 to 4 As shown, an anti-dry-burning heating tube assembly includes a heating tube 1, a temperature-sensing blind tube 2, and a flange 3. The heating tube 1 and the temperature-sensing blind tube 2 are respectively passed through the flange 3. A thermostat is provided in the temperature-sensing blind tube 2. It further includes a ceramic heat insulation plate 4 and a connecting member 5. The ceramic heat insulation plate 4 is installed on the heating tube 1 through the connecting member 5 to block the heat of the heating tube 1. Preferably, the ceramic heat insulation plate 4 is made of zirconia honeycomb ceramic material. In this application, using a ceramic heat insulation plate for heat insulation has a low cost, and moreover, connecting it to the heating tube through a connecting member is more convenient for production configuration and subsequent installation. Preferably, the length of the ceramic heat insulation plate 4 is not less than 25 cm and the width is not less than 6 cm.

[0030] See Figures 2 to 4 As shown, the ceramic heat insulation plate 4 includes a plate body 41. The plate body 41 is formed with an installation groove 410 penetrating the length direction of the plate body 41. The longitudinal section of the installation groove 410 is triangular. The connecting member 5 includes a clamping foot 51. The clamping foot 51 is fish-tail shaped. The clamping foot 51 is inserted into the installation groove 410. In this application, the ceramic heat insulation plate is installed by the cooperation of the installation groove on the plate body and the clamping foot of the connecting member, with a simple structure and convenient installation.

[0031] See Figure 2 、 3 As shown, the installation groove 410 is located at the two side edges of the plate body 41. This structural design makes the installation of the ceramic heat insulation plate more stable and not easily fall off from the heating tube due to the vibration caused by water ingress.

[0032] See Figure 2 、 3 As shown, the longitudinal section of the plate body 41 is a flattened Ω shape. This structural design is beneficial to subsequent installation operations.

[0033] See Figure 2 、 3 As shown, the ceramic heat insulation plate 4 further includes a strengthening portion 42. The strengthening portion 42 is connected along the length direction of the plate body 41 to the middle of the plate body 41 on the side opposite to the installation groove 410. In this application, the design of the strengthening portion is beneficial to further blocking the high temperature of the heating tube.

[0034] See Figure 2 、 3As shown, the strengthening part 42 includes a long strip plate, and the long strip plate is arranged to equally divide the middle part of the plate body 41 at equal intervals. Preferably, the strengthening part 42 uses at least one long strip plate. More preferably, the strengthening part 42 uses a plurality of long strip plates, and the plurality of long strip plates equally divide the size of the middle part of the plate body 41 at equal intervals. In this application, the strengthening part uses a plurality of long strip plates, and the gaps between the long strip plates can lock heat and prevent heat from escaping. Therefore, the strengthening part can reduce the material used for the ceramic heat insulation plate without losing the heat insulation effect, and further reduce the weight of the ceramic heat insulation plate.

[0035] See Figure 3 , 4 As shown, the connecting part 5 further includes a clamping head 52, and the clamping head 52 includes two oppositely arranged arc-shaped clamping bars 521, and the heating tube 1 is installed between the oppositely arranged arc-shaped clamping bars 521.

[0036] See Figure 4 As shown, the top end of the arc-shaped clamping bar 521 is bent and extends upward to form a mating piece 5211. In this application, the setting of the mating piece 5211 can limit the distance between the oppositely arranged arc-shaped clamping bars, so that the clamping force on the heating tube is more appropriate and will not be too loose or too tight.

[0037] See Figure 2 As shown, the heating tube 1 is connected to the temperature detection blind tube 2 through a heat conducting member 6. In this application, by connecting a heat conducting member between the heating tube and the temperature detection blind tube, the high temperature of the heating tube can be quickly transmitted to the temperature detection blind tube, so that the temperature controller in the temperature detection blind tube can quickly respond without delay, and thus cut off the power supply to the heating tube.

[0038] Furthermore, a water treatment material is also loaded on the ceramic heat insulation plate 4. Preferably, the water treatment material includes at least one of a water softener, a chlorine remover, a scale inhibitor, and a corrosion inhibitor.

[0039] An electric water heater, see Figure 5 As shown, the above anti-dry burning heating tube assembly is adopted.

[0040] See Figure 5 As shown, it includes an inner tank K provided with a tank opening, a flange plate 3 is covered on the circumferential edge of the tank opening, and the ceramic heat insulation plate 4 extends horizontally close to the bottom wall of the inner tank K and is located between the heating tube 1 and the bottom wall of the inner tank K. In this application, the ceramic heat insulation plate is located between the heating tube and the bottom wall of the inner tank, which can better block the damage of the high temperature of the heating tube to the inner tank, has a good anti-dry burning effect and a higher safety factor.

[0041] Although the specific implementation manners of the present invention have been described above, those of ordinary skill in the art can make changes thereto without departing from the spirit and principle of the present invention. The protection scope of the present invention is defined by its claims and their equivalents.

Claims

1. An anti-dry-burning heating tube assembly, comprising a heating tube, a temperature-sensing blind tube and a flange. The heating tube and the temperature-sensing blind tube are respectively inserted through the flange, and a temperature controller is arranged in the temperature-sensing blind tube. It is characterized in that: It further includes a ceramic heat insulation plate and a connecting piece, and the ceramic heat insulation plate is installed on the heating tube through the connecting piece to block the heat of the heating tube.

2. The dry-burning prevention heating tube assembly according to claim 1, characterized in that: The ceramic heat insulation plate includes a plate body, and an installation groove penetrating the length direction of the plate body is formed in the plate body. The longitudinal section of the installation groove is triangular. The connecting piece includes a clamping foot, and the clamping foot is fish-tail shaped. The clamping foot is inserted into the installation groove.

3. The dry-burning prevention heating tube assembly according to claim 2, wherein: The installation grooves are located at the two side edges of the plate body.

4. The anti-dry-burning heating tube assembly according to claim 3, wherein: The longitudinal section of the plate body is flattened Ω-shaped.

5. The dry-burning prevention heating tube assembly according to claim 3 or 4, characterized in that: The ceramic heat insulation plate further includes a strengthening part, and the strengthening part is connected along the length direction of the plate body to the middle part of the plate body on the side opposite to the installation groove.

6. The anti-dry-burning heating tube assembly according to claim 5, characterized in that: The strengthening part includes a long strip plate, and the long strip plate is arranged to equally divide the middle part of the plate body at intervals.

7. The dry-burning prevention heating tube assembly according to claim 2, characterized in that: The connecting piece further includes a clamping head, and the clamping head includes two oppositely arranged arc-shaped clamping strips, and the heating tube is loaded between the oppositely arranged arc-shaped clamping strips.

8. The anti-dry-burning heating tube assembly according to claim 7, wherein: The top end of the arc-shaped clamping strip is bent and extends upward to form a mating piece.

9. The dry-burning prevention heating tube assembly according to any one of claims 1 to 4, 6 to 8, characterized in that: The heating tube and the temperature detecting blind tube are connected through a heat conducting piece.

10. The anti-dry-burning heating tube assembly according to any one of claims 1 to 4 and 6 to 8, characterized in that: A water treatment material is also loaded on the ceramic heat insulation plate.

11. An electric water heater, characterized in that: Adopt the anti-dry burning heating tube assembly according to any one of claims 1 to 10.

12. The electric water heater according to claim 11, wherein: It includes an inner tank provided with a tank opening, the flange is covered on the circumferential edge of the tank opening, and the ceramic heat insulation plate extends horizontally near the bottom wall of the inner tank and is located between the heating tube and the bottom wall of the inner tank.

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