Water heater with anti-freezing function

Abstract

The application discloses a water heater with anti-freezing and anti-cracking functions, which comprises a shell, a water inlet pipe and a water outlet pipe arranged on the shell, a heating module, a pressure relief assembly, wherein the heating module is provided with a water inlet and a water outlet, and is used for heating water flowing therethrough; the pressure relief assembly comprises a first connecting pipe, a plug and a spring, a stepped hole is formed in the first connecting pipe, the plug is provided with an extension rod at each end, the plug is arranged in the first connecting pipe and cooperates with the stepped surface of the stepped hole to form a sealing area, and the spring is arranged in the first connecting pipe and is used for applying elastic force to the plug in the direction of the stepped surface, and the spring is sleeved on one extension rod; the water inlet pipe is connected with the water inlet, and the water outlet pipe is connected with the water outlet; the water inlet pipe, the heating module and the water outlet pipe form a heating flow path, and the first connecting pipe is connected with the heating flow path.

Description

Technical Field

[0001] This invention belongs to the field of household appliance technology, and in particular relates to a water heater with anti-freezing and cracking function. Background Technology

[0002] Currently, water heaters are common household appliances in people's daily lives. Water heaters are divided into types such as electric water heaters, heat pump water heaters, and solar water heaters. The difference between these different types of water heaters lies in the form of the heating module.

[0003] A water heater typically consists of a heating module, an inlet pipe, and an outlet pipe. Water from the user's home water supply pipe enters the heating module through the inlet pipe, and after being heated, the water is output from the outlet pipe to the water-using terminal (such as a faucet or shower head).

[0004] However, in actual use, due to the influence of ambient temperature, when the temperature is too low, the inlet pipe may freeze and burst, leading to reduced reliability. Therefore, how to design a water heater technology with high reliability is the technical problem this invention aims to solve. Summary of the Invention

[0005] This invention provides a water heater with anti-freeze and anti-crack function, which realizes the external pressure relief component to drain water, thereby reducing the occurrence of pipe expansion and improving the reliability of the water heater with anti-freeze and anti-crack function.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] In one aspect, the present invention provides a water heater with anti-freeze and anti-crack function, characterized in that it comprises:

[0008] The outer casing is provided with an inlet pipe and an outlet pipe;

[0009] A heating module, which is equipped with an inlet and an outlet, is used to heat the flowing water.

[0010] A pressure relief assembly includes a first connecting pipe, a plug, and a spring. A stepped hole is formed in the first connecting pipe. An extension rod is provided at each of the two ends of the plug. The plug is disposed in the first connecting pipe and cooperates with the stepped surface of the stepped hole to form a sealing area. The spring is disposed in the first connecting pipe and is used to apply a spring force to the plug in the direction of the stepped surface. The spring is sleeved on one of the extension rods.

[0011] The water inlet pipe is connected to the water inlet, and the water outlet pipe is connected to the water outlet; the water inlet pipe, the heating module, and the water outlet pipe form a heating flow path, and the first connecting pipe is connected to the heating flow path.

[0012] Compared with the prior art, the water heater with anti-freeze and anti-crack function provided by the present invention has a pressure relief component in the heating flow path. The first connecting pipe of the pressure relief component is equipped with a plug. The plug is sealed on the stepped surface of the first connecting pipe by a spring. When the water in the heating flow path freezes, the water will expand in volume during the process of freezing, and the water pressure in the heating flow path will increase. Finally, under the action of water pressure, the plug can open the first connecting pipe by the elastic force of the spring, so that the water in the heating flow path can be released, thereby reducing the water pressure in the heating flow path, reducing the phenomenon of pipe expansion, and improving the reliability of the water heater with anti-freeze and anti-crack function.

[0013] In some embodiments of this application, the outer opening of the first connecting pipe is provided with a cap, and the spring is clamped between the cap and the plug.

[0014] In some embodiments of this application, an overflow port is provided on the wall of the first connecting pipe.

[0015] In some embodiments of this application, the overflow port faces the back of the housing.

[0016] In some embodiments of this application, it further includes: an anti-expansion and cracking component, the anti-expansion and cracking component including a second connecting pipe and a flexible buffer component, the flexible buffer component being disposed in the second connecting pipe, the second connecting pipe being connected to the heating flow path.

[0017] By placing a flexible buffer component capable of flexible deformation in the second connecting pipe of the anti-expansion and cracking assembly, when the water in the heating flow path freezes in low winter temperatures, the water expands in volume during the freezing process, which in turn squeezes the flexible buffer component in the second connecting pipe. The flexible buffer component deforms after being squeezed to counteract the effect of the volume expansion of the water during freezing on the heating flow path, reducing the occurrence of pipe expansion and improving the reliability of water heaters with anti-freeze and cracking functions.

[0018] In some embodiments of this application, the flexible buffer component includes a flexible tube with closed ends and an air cavity formed inside the flexible tube.

[0019] The water heater with anti-freezing and cracking function provided by the present invention uses the flexible tube to manufacture the flexible buffer component. The flexible tube can be easily inserted into the second connecting pipe, thereby facilitating quick on-site assembly by operators. At the same time, the flexible tube can be extended along the axial direction in the second connecting pipe to increase the volume occupied by the flexible tube. In this way, during later use, the flexible tube can generate greater deformation to resist the volume expansion caused by water freezing.

[0020] In some embodiments of this application, the flexible buffer component further includes a support rib disposed in the air cavity.

[0021] By embedding the supporting ribs inside the flexible tube, the supporting ribs can provide support to the tube wall of the flexible tube. In this way, during normal use, the water pressure in the second connecting tube will not crush the flexible tube, ensuring that the flexible tube maintains its shape and occupies enough space, thereby ensuring that sufficient deformation can be generated when the water freezes.

[0022] In some embodiments of this application, the cross-section of the supporting rib is a straight line or a cross shape.

[0023] In some embodiments of this application, the supporting ribs are flexible structures.

[0024] In some embodiments of this application, the flexible buffer component is an airbag.

[0025] By placing an airbag in the second connecting tube, the airbag can be compressed when the water expands as it turns into ice, thus reserving space to meet the increased volume requirements during the water-to-ice process.

[0026] In some embodiments of this application, the outer end of the second connecting tube extends outside the housing, and the outer end of the second connecting tube is provided with a removable maintenance cover.

[0027] By extending the outer end of the second connecting pipe to the outside of the housing, and providing a removable maintenance cover at the outer end of the second connecting pipe, when the flexible buffer component in the second connecting pipe is damaged due to compression, it can be repaired or replaced by opening the maintenance cover, thus ensuring that the water heater with anti-freeze function has good anti-freeze capability.

[0028] In some embodiments of this application, the second connecting pipe is provided with a first connecting port, which is connected to the inlet pipe or the outlet pipe.

[0029] In some embodiments of this application, the second connecting pipe is connected between the heating module and the water inlet pipe or the water outlet pipe.

[0030] In some embodiments of this application, the second connecting pipe is provided with a second connecting port and a third connecting port; the second connecting port is connected to the heating module, and the third connecting port is connected to the water inlet pipe or the water outlet pipe.

[0031] In some embodiments of this application, the second connecting pipe is provided with a fourth connecting port, and the first connecting pipe is connected to the fourth connecting port. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of an embodiment of the water heater with anti-freezing and cracking function according to the present invention;

[0034] Figure 2 This is a partial structural schematic diagram of an embodiment of the water heater with anti-freezing and cracking function of the present invention;

[0035] Figure 3 This is a schematic diagram of the anti-expansion crack component in one embodiment of the water heater with anti-freezing and anti-cracking function of the present invention;

[0036] Figure 4 This is an assembly cross-sectional view of the pressure relief component and the anti-expansion crack component in one embodiment of the water heater with anti-freezing and cracking function of the present invention;

[0037] Figure 5 This is one of the schematic diagrams of the flexible tube structure in an embodiment of the water heater with anti-freezing and cracking function of the present invention;

[0038] Figure 6 This is a second schematic diagram of the flexible tube structure in another embodiment of the water heater with anti-freezing and cracking function of the present invention;

[0039] Figure 7 for Figure 6 A magnified view of a portion of region B in the middle.

[0040] Explanation of reference numerals in the attached figures:

[0041] Outer shell 1;

[0042] Inlet pipe 11, outlet pipe 12;

[0043] Electric heating module 2;

[0044] Anti-expansion crack component 3;

[0045] Second connecting pipe 31, flexible buffer component 32, maintenance cover 33;

[0046] Flexible tube 321, supporting rib 322;

[0047] Pressure rupture part 3211, connecting pipe 3212;

[0048] Pressure relief component 4;

[0049] First connecting pipe 41, plug 42, spring 43, end cap 44;

[0050] Stepped surface 411, overflow port 412, extension rod 421. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0054] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0055] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0056] Water heaters with anti-freeze and crack protection functions are classified according to the heating source of their heating modules: electric water heaters with anti-freeze and crack protection functions, gas water heaters with anti-freeze and crack protection functions, solar water heaters with anti-freeze and crack protection functions, and heat pump water heaters with anti-freeze and crack protection functions. Among them, electric water heaters with anti-freeze and crack protection functions use electric heating components (such as electric heating tubes) for heating in their heating modules, gas water heaters with anti-freeze and crack protection functions use burners for heating in their heating modules, solar water heaters with anti-freeze and crack protection functions use solar collectors for heating in their heating modules, and heat pump water heaters with anti-freeze and crack protection functions use heat exchangers for heating in their heating modules.

[0057] Among them, different water heaters with anti-freeze and anti-crack functions are equipped with inlet pipes and outlet pipes. During use, due to the influence of ambient temperature, the water in the pipes is prone to freezing in winter, causing the pipes to expand. Therefore, it is necessary to install anti-expansion and anti-crack components to solve the problem of pipe expansion.

[0058] The following explanation uses an instant electric water heater with anti-freezing and cracking function as an example.

[0059] An instant electric water heater with anti-freeze and crack prevention function uses electricity as the main energy source. The high temperature heat generated after being powered on directly heats the water stored in the instant electric water heater with anti-freeze and crack prevention function to achieve the purpose of producing hot water.

[0060] Instantaneous electric water heaters with anti-freezing and cracking functions typically consist of components such as an electric heating module and an electric control board. The electric heating module forms a water cavity to store water to be heated. The electric heating element in the electric heating module is energized to heat the water flowing into the water cavity. The electric control board is used to control the on and off operation of the electric heating module so that the water output by the electric heating module is heated to the set temperature.

[0061] The control board is used to receive detection signals from relevant sensors (such as water temperature sensors and flow sensors) and control the power supply to and from the electric heating module.

[0062] When a water heater with anti-freeze and anti-crack function is working, the electric heating module is powered on by the electric control board. After the water flowing into the electric heating module from the inlet pipe is heated, hot water is output from the outlet pipe.

[0063] like Figures 1-5 As shown, the water heater with anti-freeze and anti-crack function in this embodiment includes:

[0064] The outer casing 1 is provided with a water inlet pipe 11 and a water outlet pipe 12.

[0065] Electric heating module 2, which is equipped with an inlet and an outlet, is used to heat the flowing water.

[0066] The pressure relief assembly 4 includes a first connecting pipe 41, a plug 42, and a spring 43. A stepped hole is formed in the first connecting pipe 41. An extension rod 421 is provided at both ends of the plug 42. The plug 42 is disposed in the first connecting pipe 41 and cooperates with the stepped surface 411 of the stepped hole to form a sealing area. The spring 43 is disposed in the first connecting pipe 41 and is used to apply a spring force to the plug 42 in the direction of the stepped surface 411. The spring 43 is sleeved on an extension rod 421.

[0067] The water inlet pipe is connected to the water inlet, and the water outlet pipe is connected to the water outlet; the water inlet pipe, the heating module, and the water outlet pipe form a heating flow path, and the first connecting pipe 41 is connected to the heating flow path.

[0068] Specifically, in this embodiment, the water heater with anti-freezing and cracking function is installed on the wall of the room through the outer shell 1 during use. The inlet pipe 11 is connected to the water supply pipe in the user's home, and the outlet pipe 12 is connected to the water terminal (hot water tap or shower head) in the user's home.

[0069] In actual use, water from the water supply pipe in the user's home flows into the electric heating module 2 through the inlet pipe 11. The electric heating module 2 is powered on to heat the flowing water. The hot water output by the electric heating module 2 is then output through the outlet pipe 12 and supplied to the user through the water terminal.

[0070] During winter use, water also flows into the first connecting pipe 41 from the pressure relief component 4 connected to the heating flow path. When the temperature drops and the water in the heating flow path freezes, the heating flow path and the first connecting pipe 41 form a closed pipeline when the user is not using hot water. During the freezing process, the volume of the solid-liquid mixture in the pipeline will expand, which will lead to an increase in water pressure in the pipeline.

[0071] During the expansion of the solid-liquid mixture in the pipeline, as the water pressure inside the pipeline continues to increase, the water pressure received by the plug 42 exceeds the elastic force applied by the spring 43. This allows the plug 42 to overcome the elastic force of the spring 43 and move away from the stepped surface 411 to open the first connecting pipe 41 and release pressure. Simultaneously, during the movement of the plug 42, the extension rods 421 at both ends act as guides, ensuring that after pressure release, the plug 42 automatically seals the stepped surface 411 to seal the stepped hole.

[0072] In some embodiments, the outer opening of the first connecting pipe 41 is provided with a cap 44, and a spring 43 is clamped between the cap 44 and the plug 42.

[0073] Specifically, the first connecting pipe 41 is threaded onto a cap 44 at one end to support the spring 43, thereby clamping the spring 43 between the plug 42 and the cap 44. To facilitate guiding the extension rod 421 on which the spring 43 is fitted, the cap 44 can be configured as a ring structure. This allows the extension rod 421 to be inserted into the circular hole formed by the cap 44 for support and guidance during the sliding process of the plug 42.

[0074] In some embodiments, an overflow port 412 is provided on the wall of the first connecting pipe 41.

[0075] Specifically, after the plug 42 is opened by water pressure, the overflowing water will be discharged to the outside of the first connecting pipe 41 through the overflow port 412. Preferably, the overflow port 412 faces the back of the housing, so that the water discharged from the overflow port 412 will flow downward through the back plate of the housing, and the bottom of the housing can be fitted with a drain hole (not shown), and the overflowing water will finally flow out from the drain hole.

[0076] By using the flexible tube to manufacture the flexible buffer component, the flexible tube can be easily inserted into the second connecting tube, thereby facilitating quick on-site assembly by operators. At the same time, the flexible tube can be extended along the axial direction in the second connecting tube to increase the volume occupied by the flexible tube. In this way, during later use, the flexible tube can generate greater deformation to resist the volume expansion caused by water turning into ice.

[0077] Based on the above technical solution, optionally, the water heater with anti-freezing and cracking function of the present invention also includes an anti-expansion and cracking component 3.

[0078] The anti-expansion and cracking component 3 includes a second connecting pipe 31 and a flexible buffer component 32. The flexible buffer component 32 is disposed in the second connecting pipe 31, and the second connecting pipe 31 is connected to the heating flow path.

[0079] Specifically, water also flows into the second connecting pipe 31 through the anti-expansion and cracking component 3 connected to the heating flow path. In winter, when the temperature drops and the water in the heating flow path freezes, the heating flow path and the second connecting pipe 31 form a closed pipeline when the user is not using hot water. During the freezing process, the volume of the solid-liquid mixture in the pipeline will expand.

[0080] During the expansion of the solid-liquid mixture in the pipeline, since the second connecting pipe 31 is connected to the heating flow path, the unfrozen water in the solid-liquid mixture will flow into the second connecting pipe 31, so that the water in the second connecting pipe 31 will continuously increase. Under the action of water pressure, the flexible buffer component 32 will be compressed and deformed, thereby meeting the requirements of volume expansion in the pipeline.

[0081] Since the flexible buffer component 32 can be deformed by water or ice, the pressure rise in the pipe in the heating flow path can be reduced, thus effectively reducing the occurrence of pipe expansion.

[0082] By connecting an anti-expansion and cracking component to the heating flow path of a water heater with anti-freeze and cracking function, a flexible buffer component capable of flexible deformation is placed in the second connecting pipe of the anti-expansion and cracking component. When the water in the heating flow path freezes in low winter temperatures, the water expands in volume during the freezing process, which in turn squeezes the flexible buffer component in the second connecting pipe. The flexible buffer component deforms after being squeezed to counteract the impact of the volume expansion of the water during freezing on the heating flow path, reducing the phenomenon of pipe expansion and improving the reliability of the water heater with anti-freeze and cracking function.

[0083] In some embodiments of this application, the flexible buffer component 32 includes a flexible tube 321, both ends of which are closed structures, and the air cavity is formed inside the flexible tube 321.

[0084] Specifically, the flexible tube 321 can be made of materials such as silicone or rubber, so that the flexible tube 321 can be compressed and deformed when subjected to external pressure to meet the requirement of increased volume due to water turning into ice.

[0085] By using a flexible tube 321 to manufacture the flexible buffer component 32, the flexible tube 321 can be easily inserted into the second connecting tube 31 during the assembly process, thereby facilitating quick assembly by operators on site.

[0086] Furthermore, the flexible tube 321 is normally quite long. It can be extended along the axial direction within the second connecting tube 31 to fully utilize its length and increase the volume occupied by the flexible tube 321. This allows the flexible tube 321 to undergo greater deformation during later use, thus mitigating the volume expansion caused by water freezing.

[0087] In some embodiments of this application, the flexible buffer component 32 further includes a support rib 322, which is disposed in the air cavity.

[0088] Specifically, since the water pressure in the water supply network is also a certain pressure during normal use of water heaters with anti-freezing and cracking function, in order to reduce the excessive deformation of the flexible pipe 321 due to water pressure during normal use, a support rib 322 can be built into the flexible pipe 321.

[0089] In this way, during normal use, the water flowing into the second connecting pipe 31 will exert pressure on the flexible pipe 321. Under the action of the supporting rib 322, the shape and contour of the flexible pipe 321 can be well maintained, so as to avoid the flexible pipe 321 being crushed due to water pressure.

[0090] By incorporating a support rib 322 within the flexible tube 321, the support rib 322 can provide support to the tube wall of the flexible tube 321. In this way, during normal use, the water pressure in the second connecting tube 31 will not crush the flexible tube 321, ensuring that the flexible tube 321 maintains its shape and occupies enough space, thereby ensuring that sufficient deformation can be generated when the water freezes.

[0091] Among them, the cross section of the support rib 322 can be a straight line or a cross shape.

[0092] In addition, to ensure that the flexible tube 321 can be effectively compressed during the water-to-ice process, the support rib 322 is a flexible structure.

[0093] Specifically, the support rib 322 adopts a flexible structure. In this way, when the flexible pipe 321 is subjected to greater pressure during the water-to-ice process, the support rib 322 can also deform to create more space, further improving the anti-expansion capability of the pipe.

[0094] Furthermore, in order to maximize the anti-expansion capability, in some embodiments, such as... Figures 6-7 As shown, the flexible tube 321 is filled with a water-absorbing and heat-releasing material, and a pressure-breaking section 3211 is also provided on the flexible tube 321.

[0095] Specifically, when most of the water in the waterway is frozen, the flexible pipe 321 will be compressed to a significant extent. However, as the freezing intensifies, the water pressure in the second connecting pipe 31 continues to increase, causing the pressure-breaking section 3211 on the flexible pipe 321 to rupture, allowing water to enter the flexible pipe 321. During the mixing process of water and the water-absorbing and heat-releasing material, the water in the water-absorbing and heat-releasing material solution generates heat, which can melt the ice in the second connecting pipe 31. At the same time, since the pressure-breaking section 3211, after rupture, allows water to enter the flexible pipe 321, the mixture in the flexible pipe 321 will not flow back out under external pressure, ensuring reliable operation.

[0096] Water-absorbing and heat-releasing materials can generally be water-soluble materials, such as calcium oxide. To prevent the solution in the flexible tube 321 from flowing back out, a connecting tube 3212 can be provided at the bottom of the flexible tube 321. The outer end of the connecting tube 3212 is an open structure, and the inner end of the connecting tube 3212 forms a pressure-breaking section 3211.

[0097] The pressure rupture section 3211 can be a membrane or other structure installed on the connecting pipe 3212. In actual use, when the external pressure of the flexible pipe 321 exceeds the set value, the pressure rupture section 3211 will rupture due to the pressure. This allows water outside the flexible pipe 321 to flow into the flexible pipe 321 through the connecting pipe 3212. The water enters the flexible pipe 321 and mixes with the water-absorbing and heat-releasing material.

[0098] The water-absorbing and heat-releasing material releases heat when mixed with water, thereby heating the second connecting pipe 31 to slow down the continued freezing of the water in the second connecting pipe 31, thus more effectively reducing the occurrence of pipe expansion.

[0099] Meanwhile, the second connecting pipe 31 is usually arranged vertically, and correspondingly, the connecting pipe 3212 is generally arranged at the lower end of the flexible pipe 321. This is to prevent the mixed liquid in the flexible pipe 321 from flowing back into the second connecting pipe 31, thereby improving the reliability of use.

[0100] Preferably, when the pressure breakage section 3211 breaks, it indicates that the freezing situation is serious. Therefore, a water leakage sensor (not shown) is also provided at the bottom of the flexible tube 321. The water leakage sensor is arranged at the bottom of the flexible tube 321 and can detect water entering the flexible tube 321, and then send a signal to the controller of the water heater with anti-freeze function to trigger the water heater with anti-freeze function to issue an alarm.

[0101] In another embodiment, the flexible buffer component 32 can also be an airbag. Specifically, by placing an airbag in the second connecting pipe, the airbag can be compressed when the water expands to ice, thus reserving space to meet the volume increase requirements during the water-to-ice process.

[0102] In some embodiments of this application, in order to facilitate the maintenance and replacement of the flexible buffer component 32, the outer end of the second connecting pipe 31 extends to the outside of the housing 1, and the outer end of the second connecting pipe 31 is provided with a removable maintenance cover 33.

[0103] Specifically, if the flexible buffer component 32 is damaged due to prolonged use or freezing, the operator can open the maintenance cover 33 to remove the flexible buffer component 32 in the second connecting pipe 31 and replace it with a new flexible buffer component 32.

[0104] By extending the outer end of the second connecting pipe 31 to the outside of the outer casing 1, and providing a removable maintenance cover 33 at the outer end of the second connecting pipe 31, when the flexible buffer component in the second connecting pipe 31 is damaged due to compression, it can be repaired or replaced by opening the maintenance cover 33, so as to ensure that the water heater with anti-freeze cracking function has good anti-freeze ability.

[0105] In some embodiments of this application, there are multiple ways to connect the second connecting pipe 31. For example, the second connecting pipe 31 is provided with a first connecting port, which is connected to the inlet pipe 11 or the outlet pipe 12.

[0106] Specifically, the second connecting pipe 31 is only connected to the heating flow path through the first connecting port so that the water in the heating flow path can fill the second connecting pipe 31.

[0107] Alternatively, the second connecting pipe 31 is connected between the electric heating module 2 and the water inlet pipe 11 or the water outlet pipe 12.

[0108] Specifically, taking the connection of the second connecting pipe 31 between the electric heating module 2 and the water inlet pipe 11 as an example, water in the water supply pipeline enters the second connecting pipe 31 from the water inlet pipe 11, and then enters the electric heating module 2 through the second connecting pipe 31. To facilitate pipeline connection, the second connecting pipe 31 is provided with a second connecting port and a third connecting port; the second connecting port is connected to the electric heating module 2, and the third connecting port is connected to either the water inlet pipe 11 or the water outlet pipe 12.

[0109] In some embodiments of this application, the second connecting pipe is provided with a fourth connecting port, and the first connecting pipe 41 is connected to the fourth connecting port.

[0110] Specifically, for ease of installation, the first connecting pipe 41 is connected to the second connecting pipe so that the pressure relief component 4 can be installed through the anti-expansion and cracking component, thereby simplifying the overall structure and reducing assembly difficulty.

[0111] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0112] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.

Claims

1. A water heater with anti-freeze and cracking function, characterized in that, include: The outer casing is provided with an inlet pipe and an outlet pipe; A heating module, which is equipped with an inlet and an outlet, is used to heat the flowing water. A pressure relief assembly includes a first connecting pipe, a plug, and a spring. A stepped hole is formed in the first connecting pipe. An extension rod is provided at each of the two ends of the plug. The plug is disposed in the first connecting pipe and cooperates with the stepped surface of the stepped hole to form a sealing area. The spring is disposed in the first connecting pipe and is used to apply a spring force to the plug in the direction of the stepped surface. The spring is sleeved on one of the extension rods. The water inlet pipe is connected to the water inlet, and the water outlet pipe is connected to the water outlet; the water inlet pipe, the heating module, and the water outlet pipe form a heating flow path, and the first connecting pipe is connected to the heating flow path; The water heater with anti-freezing and cracking function also includes an anti-expansion and cracking component, which includes a second connecting pipe and a flexible buffer component. The flexible buffer component is disposed in the second connecting pipe, which is connected to the heating flow path. The outer end of the second connecting pipe extends to the outside of the outer casing, and a removable maintenance cover is provided at the outer end of the second connecting pipe. The flexible buffer component includes a flexible tube with closed ends and an air cavity formed inside the flexible tube. The flexible buffer component also includes a support rib, which is disposed in the air cavity and is a flexible structure. The flexible tube is filled with a water-absorbing and heat-releasing material, and a pressure-breaking section is also provided on the flexible tube.

2. The water heater with anti-freeze and anti-crack function according to claim 1, characterized in that, The outer end of the first connecting pipe is provided with a cap, and the spring is clamped between the cap and the plug.

3. The water heater with anti-freeze and anti-crack function according to claim 2, characterized in that, An overflow port is provided on the wall of the first connecting pipe.

4. The water heater with anti-freeze and anti-crack function according to claim 3, characterized in that, The overflow port faces the back of the housing.

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