Frost crack prevention instant electric water heater
By designing heating components and fans in the electric water heater to form a circulating air duct, the problem of water pipes freezing and cracking in low-temperature environments is solved, and uniform ice melting and reliable protection of components are achieved.
Patent Information
- Application Number
- CN202422311679.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-10-14
- Estimated Expiration
- 2034-09-20
AI Technical Summary
Electric water heaters are prone to water pipe freezing and cracking and plastic parts cracking in low temperature environments, and existing technology is difficult to effectively prevent this problem.
The heating element and fan design form a circulating air duct with the shortest path, using hot air to evenly distribute and melt ice. The operation of the heating element and fan is controlled by the control module to avoid dry burning and burns, and improve the reliability of components.
It achieves uniform temperature distribution inside the electric water heater, prevents freezing and cracking, improves energy utilization, protects the stability of the control module, and avoids the risk of dry burning and scalding.
Smart Images
Figure CN223435274U_ABST
Abstract
Description
Technical field
[0001] The utility model relates to the field of household appliances, in particular to an anti-freezing instant electric water heater. [Background Technology]
[0002] In winter, the water in the internal pipes of the electric water heater freezes and expands in volume, causing the pipes to burst. In addition, due to the long-term influence of the low temperature environment, other components such as plastic pipes are prone to cracking and becoming brittle and breaking. [Summary of the invention]
[0003] In view of this, the utility model provides an anti-freeze crack instant electric water heater.
[0004] The utility model adopts the following technical scheme to construct an anti-freeze cracking instant electric water heater, including a heating component and a fan arranged inside the shell; an air inlet is provided above the heating component, and an air outlet is provided below the heating component, and the fan is arranged at the air inlet, and its air outlet direction is directly facing the air inlet.
[0005] Preferably, the air inlet is arranged above the side of the heating component.
[0006] Preferably, the air outlet is arranged below the side of the heating component and is located on the same side as the air inlet.
[0007] Preferably, it further comprises a control module, which is arranged below or below the heating component.
[0008] Preferably, it further comprises a control module, which is arranged below or below the heating component.
[0009] Preferably, it also includes a bottom shell that constitutes its shell, and the heating component also includes a heating element, a retaining wall, and a thermal insulation cover; the retaining wall is vertically arranged on the bottom shell, fixedly connected to the bottom shell, and located around the heating element; the thermal insulation cover is arranged parallel to the shell surface and the heating element surface, and is fixedly connected to the side of the bottom shell and the retaining wall on all sides.
[0010] Preferably, it also includes a bottom shell that constitutes its shell, and the heating component also includes a heating element, a retaining wall, and a thermal insulation cover; the retaining wall is vertically arranged on the bottom shell, fixedly connected to the bottom shell, and located around the heating element; the thermal insulation cover is arranged parallel to the shell surface and the heating element surface, and is fixedly connected to the side of the bottom shell and the retaining wall on all sides.
[0011] Preferably, it also includes a bottom shell that constitutes its shell, and the heating component also includes a heating element, a retaining wall, and a thermal insulation cover; the retaining wall is vertically arranged on the bottom shell, fixedly connected to the bottom shell, and located around the heating element; the thermal insulation cover is arranged parallel to the shell surface and the heating element surface, and is fixedly connected to the side of the bottom shell and the retaining wall on all sides.
[0012] The beneficial technical effects of the utility model are:
[0013] 1. The inlet and outlet form the shortest path of the circulating air duct, which evenly distributes the heat of the heating body inside the heating body, completely melts the ice, has high energy utilization rate and less loss.
[0014] 2. The air temperature at the outlet below the side of the heating assembly is low, which does not affect the performance of the components of the control module arranged below or at the bottom of the heating assembly, and improves the reliability of the electrical components.
[0015] 3. In the anti-freezing mode, the operation time of the heating body and the fan is at the same time as the ice melting is complete, which avoids the phenomenon of dry burning of the heating body and scalding of the user.
DRAWINGS
[0016] Figure 1 Figure 1 is a structural exploded view of the anti-freezing instant electric water heater of one angle in Example 1.
[0017] Figure 2 Figure 2 is a structural view of the anti-freezing instant electric water heater of one angle without a cover in Example 1.
[0018] Figure 3 Figure 3 is a partial enlarged view of the air inlet of the anti-freezing instant electric water heater in Example 1.
[0019] Figure 4 Figure 4 is a schematic view of the circulating air duct of the anti-freezing instant electric water heater in Example 1.
[0020] Figure 5 Figure 5 is a schematic view of the control method of the anti-freezing instant electric water heater in Example 1.
[0021] Figure 6 Figure 6 is a partial data chart of the anti-freezing instant electric water heater in Example 1.
[0022] Figure 7 Figure 7 is a schematic view of the circulating air duct of the anti-freezing instant electric water heater in Example 2.
DETAILED DESCRIPTION
[0023] In order to make the technical solutions and technical effects of the patent more clear, the specific embodiments of the patent will be described in detail below in combination with the drawings and examples.
[0024] Example 1:
[0025] As Figures 1 to 3 , the anti-freezing instant electric water heater in the embodiment includes a cover 1, a bottom shell 2, a heating assembly 3, a water inlet pipe 4, a water inlet temperature sensor 5, a water outlet pipe 6, a water outlet temperature sensor 7, a fan 8 and a control module 9.
[0026] The cover 1 and the bottom shell 2 are fixedly connected to form the shell of the electric water heater.
[0027] The heating component 3 includes a heating element 31 , a retaining wall 32 , a heat-insulating cover 33 , an air inlet 34 and an air outlet 35 .
[0028] The heating element 31 includes a heating tube, a water tube and a plurality of heat sinks 311. The heating tubes and the water tubes are evenly spaced adjacent to each other so that the water in the water tubes can fully absorb the heat emitted by the heating tubes. The heating tubes are electrically connected to the control module 9. In order to make the heat transfer faster inside the heating element 31 and improve the energy efficiency ratio, a material with good thermal conductivity, such as a cast aluminum layer, will be provided on the surface of the heating tube; at the same time, heat sinks 311 are evenly provided on the surface of the heating element 31 to speed up the heat transfer speed. In order to further improve the heat dissipation speed of the radiator, the heat sink 311 is selected from a metal material with good thermal conductivity, and the heat dissipation surface area of the heat sink 311 is increased. The cross-section of the heat sink 311 is not limited to a straight line, and can be wavy or serrated.
[0029] The retaining wall 32 is vertically arranged on the bottom shell 2, fixedly connected to the bottom shell 2, and located around the heating element 31 to isolate the heat emitted by the heating element 31, thereby preventing the electronic components of the control module 9 from being heated and affecting their lifespan or working performance; the retaining wall 32 is made of a material with good thermal insulation performance, such as ABS plastic.
[0030] The heat preservation cover 33 is arranged parallel to the surface of the shell and the surface of the heating element 31, and is fixedly connected to the side of the bottom shell 2 and the retaining wall 32. The heat preservation cover 33, the retaining wall 32 and the bottom shell 2 form a heat preservation cavity, which ensures that the heat of the heating element 31 is fully utilized in the cavity.
[0031] An air inlet 34 is provided on the upper right side of the heating component 3, and an air outlet 35 is provided on the lower right side. The air inlet 34 is a gap between the upper and right side retaining walls 32, and the air outlet 35 is an opening on the right side retaining wall 32.
[0032] The water inlet pipe 4 and the water outlet pipe 6 pass through the bottom of the housing, with one end exposed outside the housing and the other end connected to the water pipe input and output ports inside the heating element 31. An inlet water temperature sensor 5 is located within the inlet pipe 4 at one end and electrically connected to the control module 9 at the other end. An outlet water temperature sensor 7 is located within the outlet pipe 6 at one end and electrically connected to the control module 9 at the other end.
[0033] The fan 8 is arranged at the air inlet 34 of the heating component 3, with the air outlet direction facing the air inlet 34, and is electrically connected to the control module 9; the control module 9 is arranged at the lower right side of the heating component 3.
[0034] The control module 9 controls the heating of the heating body 31 according to the temperature detected by the inlet water temperature sensor 5 and the outlet water temperature sensor 7, and controls the rotation of the fan 8 when it is determined that the water pipe in the heating body 31 enters the anti-freezing mode. The air flow blown by the fan 8 enters the heating assembly 3 through the air inlet 34 at the upper right of the heating assembly 3, disperses the heat on the surface of the heating body 31, and flows out of the heating assembly 3 through the air outlet 35, forming a complete counterclockwise circulating air duct. The air duct has no bypass outside the heating assembly 3, the path length is the shortest, and the heat carried by the air flow is less lost after flowing out of the air outlet 35 and back to the inside of the heating assembly 3. When the heating body 31 heats up and the fan 8 is not started, the hot air rises, the temperature inside the heating assembly 3 is high at the top and low at the bottom. When the fan 8 is started, the air flow flows through the counterclockwise circulating air duct to make the temperature inside the heating body 31 uniform, and the ice melting is comprehensive and thorough. At the same time, the temperature of the air flow flowing out of the air outlet 35 is lower than the temperature at the top of the heating assembly 3, which does not affect the stability of the electronic components inside the control module 9. When the fan 8 is damaged and the heating body 31 heats up, the hot air rises, and the heat flows out of the air inlet 34 without being radiated to the control module 9, ensuring the safety of the control module 9 and achieving the purpose of ice melting and anti-freezing. Figure 4
[0035] The anti-freezing and cracking instantaneous electric water heater control device comprises a detection unit, a control unit, a heating unit and a fan unit. The detection unit is used for detecting the temperature in the inlet water pipe and the outlet water pipe of the anti-freezing and cracking instantaneous electric water heater, and the output end thereof is connected to the control unit. The control unit determines whether to enter the anti-freezing mode according to the detected temperature in the inlet water pipe and the outlet water pipe, and controls the heating of the heating unit and the rotation of the fan unit when the anti-freezing mode is entered. The heating unit is used for heating, and the input end thereof is connected to the control unit. The fan unit is used for rotating the air outlet, and the input end thereof is connected to the control unit.
[0036] As Figure 5 , in the power-on state, the control method of the anti-freezing and cracking instantaneous electric water heater in the embodiment comprises the following steps:
[0037] S1: Every 5 minutes, the inlet water temperature sensor and the outlet water temperature sensor detect the temperature in the inlet water pipe and the outlet water pipe, respectively;
[0038] S2: Determine whether the temperature in the inlet water pipe and the temperature in the outlet water pipe are ≤4℃ for 1 minute continuously; if yes, execute step S3, and if no, execute step S1;
[0039] S3: The heating body heats up for a time T1;
[0040] S4: The fan rotates for a time T2.
[0041] With the 8500-watt heating body anti-frosting instant electric water heater as an example, when the temperature detected by the temperature sensors of the water inlet pipe and the water outlet pipe is all ≤4℃ for 1 minute, the double detection and cumulative time detection can infer that the external environment is low and the machine has the possibility of icing; the control module starts the anti-frosting mode, controls the heating body to heat at a power of 2500 watts for 15 seconds, so that the short-time low-power heating can not only avoid dry burning caused by the high temperature of the heating body, but also will not heat the water in the heating body to a high temperature, so that the user has the risk of scalding. After heating for 15 seconds, the control module controls the fan to rotate for 40 minutes, and the air duct direction blows from right to left downward, so that the hot air forms a counterclockwise circulating air duct, which not only maintains the surface temperature of the heating body between 5-35℃ and the water pipe temperature of the heating body between 1-8℃, but also does not affect the stability of the circuit by not passing through the surface of the control module electronic components on the right side. After multiple tests, it is ensured that the internal environment temperature of the electric water heater can reach above 0℃; when the fan is damaged, the heat of the heating body cannot be circulated and radiated to the surrounding, and the heat accumulation of the heating body will not exceed the above parameters. After repeated testing in different environments, it can meet the anti-frosting requirements. Test data such as Figure 6 , the heating body dry burning, scalding users and the outflow air temperature of the outlet affecting the performance of the control module will not occur. Experimental data show that when the anti-frosting mode is used, the heating body is heated at a power of 2500 watts for 15 seconds, and the fan is rotated for 40 minutes, which is the optimal parameter of the anti-frosting instant electric water heater with a power of 8500 watts.
[0042] Example Two
[0043] The anti-frosting instant electric water heater in this embodiment has substantially the same structure as that in Example One, except that the heating assembly is arranged on the right side of the shell, and the control module is located below the heating assembly; the air inlet is arranged on the top of the heating assembly, and the fan is arranged at the air inlet. When the electric water heater enters the anti-frosting mode, the control module controls the heating body to heat, the fan rotates, the hot air exits through the air outlet, and then enters from the air inlet. The air flow direction is as shown in Figure 7 . It can be seen that the air flow that flows out of the air outlet will turn above the side of the heating assembly and then enter the channel above the heating assembly through the air inlet, and the air flow circulating air duct is not as smooth as that in Example One.
[0044] The control device and control method of the anti-frosting instant electric water heater in this embodiment are the same as those in Example One, and will not be described here.
[0045] Example Three
[0046] The anti-frosting instant electric water heater in this embodiment has substantially the same structure as that in Example One, except that the control module and the fan are arranged on the two sides of the heating assembly, respectively.
[0047] The anti-freezing and cracking instant electric water heater control device and control method in the embodiment are the same as those in the first embodiment, and will not be described here again.
[0048] The above only describes the preferred embodiments of the patent and is not intended to limit the patent. The patent can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the patent should be included in the protection scope of the patent.
Claims
1. An anti-freeze crack instant electric water heater, comprising a heating component (3) and a fan (8) disposed inside a housing thereof; characterized in that: An air inlet (34) is provided above the heating component (3), and an air outlet (35) is provided below the heating component (3). The fan (8) is provided at the air inlet (34), and its air outlet direction faces the air inlet (34).
2. The anti-freeze crack instant electric water heater according to claim 1, characterized in that: The air inlet (34) is arranged above the side of the heating component (3).
3. The anti-freeze crack instant electric water heater according to claim 1 or 2, characterized in that: The air outlet (35) is arranged below the side of the heating component (3) and is located on the same side as the air inlet (34).
4. The anti-freeze crack instant electric water heater according to claim 1 or 2, characterized in that: It also includes a control module (9), which is arranged below or below the heating component (3).
5. The anti-freeze crack instant electric water heater according to claim 3, characterized in that: It also includes a control module (9), which is arranged below or below the heating component (3).
6. The anti-freeze crack instant electric water heater according to claim 1 or 2, characterized in that: The heat preservation device (3) further comprises a bottom shell (2) constituting the shell, and the heating component (3) further comprises a heating element (31), a retaining wall (32), and a heat preservation cover (33); the retaining wall (32) is vertically arranged on the bottom shell (2), fixedly connected to the bottom shell (2), and located around the heating element (31); the heat preservation cover (33) is arranged parallel to the shell surface and the surface of the heating element (31), and is fixedly connected to the side surface of the bottom shell (2) and the retaining wall (32) on all sides.
7. The anti-freeze crack instant electric water heater according to claim 3, characterized in that: The heat preservation device (3) further comprises a bottom shell (2) constituting the shell, and the heating component (3) further comprises a heating element (31), a retaining wall (32), and a heat preservation cover (33); the retaining wall (32) is vertically arranged on the bottom shell (2), fixedly connected to the bottom shell (2), and located around the heating element (31); the heat preservation cover (33) is arranged parallel to the shell surface and the surface of the heating element (31), and is fixedly connected to the side surface of the bottom shell (2) and the retaining wall (32) on all sides.
8. The anti-freeze crack instant electric water heater according to claim 4, characterized in that: The heat preservation device (3) further comprises a bottom shell (2) constituting the shell, and the heating component (3) further comprises a heating element (31), a retaining wall (32), and a heat preservation cover (33); the retaining wall (32) is vertically arranged on the bottom shell (2), fixedly connected to the bottom shell (2), and located around the heating element (31); the heat preservation cover (33) is arranged parallel to the shell surface and the heating element surface 31, and is fixedly connected to the side surface of the bottom shell (2) and the retaining wall (32) on all sides.