Magnesium rod mounting structure and electric water heater

Abstract

The utility model relates to a magnesium rod mounting structure and an electric water heater, the electric water heater comprises a heating pipe and the magnesium rod mounting structure, the magnesium rod mounting structure comprises a flange plate, a fixing support and a magnesium rod, the heating pipe is mounted on the flange plate, the fixing support comprises a supporting part and an elastic mounting part, one end of the supporting part is mounted on the flange plate, and the other end of the supporting part is mounted on the elastic mounting part; the elastic mounting part is arranged at the end, away from the flange plate, of the supporting part, the elastic mounting part is provided with a mounting hole, and one end of the magnesium rod is inserted into the mounting hole, so that the elastic mounting part can elastically deform to provide pre-tightening force for pre-tightening the magnesium rod. According to the magnesium rod mounting structure, the connecting rigidity is reduced, the elastic washer is not needed, the problem that the elastic washer is aged and loses efficacy after being soaked in high-temperature water for a long time is solved, the anti-loosening purpose is achieved through elastic deformation generated by the elastic mounting part, and the mounting stability of the magnesium rod is improved.

Description

Technical Field

[0001] The present application relates to the technical field of water heaters, and in particular to a magnesium rod installation structure and an electric water heater. Background Art

[0002] In order to extend the service life of the storage electric water heaters currently on the market, anode magnesium rods are usually installed on the machine to release magnesium ions through the magnesium rods to slow down the corrosion of water alkali and scale on the inner tank. In some existing designs, the common installation method of the magnesium rod is to directly install it on the metal bracket of the flange through a threaded connection.

[0003] However, in the above installation structure, the magnesium rod and the metal bracket are directly connected by threads, which is a rigid connection method. During the subsequent transportation and installation of the electric water heater, the magnesium rod is easily loosened or falls off due to vibration, thereby affecting subsequent use. In order to reduce looseness, the prior art adds a silicone gasket or a nitrile gasket between the magnesium rod and the metal bracket, but the silicone gasket or the nitrile gasket is prone to aging and failure after being soaked in hot water for a long time. Utility Model Content

[0004] Based on this, it is necessary to provide a magnesium rod mounting structure and an electric water heater including the magnesium rod mounting structure that can solve the problem of unreliable magnesium rod mounting structure in existing electric water heaters.

[0005] A magnesium rod installation structure, characterized by comprising:

[0006] Flange;

[0007] A fixing bracket, the fixing bracket comprising a supporting portion and an elastic mounting portion, one end of the supporting portion is mounted on the flange, the elastic mounting portion is arranged at one end of the supporting portion away from the flange, and the elastic mounting portion is provided with a mounting hole;

[0008] A magnesium rod having a mounting end, wherein the mounting end is provided with a screw rod, wherein the screw rod passes through the mounting hole and is threadedly connected to the elastic mounting portion; and the mounting end abuts against the support portion.

[0009] Compared with the background technology, the magnesium rod installation structure provided by the utility model has the following beneficial effects:

[0010] By arranging a fixed bracket on the flange, the space on the flange is fully utilized, and the magnesium rod installation structure provided by the present application is highly integrated, reducing the space occupancy rate, and at the same time, by arranging a support portion installed on the flange and an elastic mounting portion bent from the support portion on the fixed bracket, when the screw of the magnesium rod passes through the mounting hole of the elastic mounting portion and is threadedly connected to the mounting hole, the elastic mounting portion can undergo a recoverable deformation, thereby providing a pre-tightening force for pre-tightening the magnesium rod. Compared with the existing conventional scheme of directly rigidly assembling the magnesium rod on the metal bracket, or adding an assembly structure of other parts such as a silicone gasket or a nitrile gasket, the connection rigidity is reduced, and there is no need to use a silicone gasket or a nitrile gasket, avoiding the problem of aging failure of the silicone gasket or the nitrile gasket under long-term immersion in high-temperature water, and providing a pre-tightening force for pre-tightening the magnesium rod by elastic deformation of the elastic mounting portion, reducing the influence of vibration on the magnesium rod, not only achieving the purpose of preventing loosening, but also improving the reliability and stability of the magnesium rod installation.

[0011] In one of the embodiments, the elastic mounting portion and the support portion form an angle so that a raised support shoulder is formed at the connection position between the elastic mounting portion and the support portion, the support shoulder and the mounting hole are staggered in the axial direction of the mounting hole, and the mounting end abuts against the support shoulder.

[0012] In one embodiment, the elastic mounting portion includes a rebound arm and a fixed seat that are integrally connected, one end of the rebound arm is connected to the support portion, and the other end is connected to the fixed seat, the fixed seat is bent and extended from one end of the rebound arm away from the support portion, so that the fixed seat is recessed relative to the support shoulder, and the mounting hole is opened on the fixed seat.

[0013] By forming a raised supporting shoulder at the connecting position of the elastic mounting part and the supporting part, the supporting shoulder and the mounting hole are staggered in the axial direction of the mounting hole, so that after the magnesium rod is connected to the fixed bracket, the mounting end of the magnesium rod abuts against the supporting shoulder, and the screw of the magnesium rod is threadedly connected to the mounting hole, and by making the elastic mounting part include an integrally connected rebound arm and a fixed seat, the fixed seat is bent and extended from one end of the rebound arm away from the supporting part, so that the fixed bracket is an integral stamping structure with a simple manufacturing process and good integrity. During the process of assembling and tightening the magnesium rod to the fixed bracket, the fixing seat will be supported by the supporting shoulder and the strong pulling force of the magnesium rod screw will be transmitted to the rebound arm, causing the rebound arm to undergo elastic deformation, so that the rebound arm can provide a certain rebound force, and this rebound force can be converted into a pre-tightening force for pre-tightening the magnesium rod, thereby reducing the connection rigidity between the magnesium rod and the fixed bracket, and playing an anti-loosening effect.

[0014] In one embodiment, the support portion has at least two, and each end of the elastic mounting portion is connected to a corresponding one of the support portions, so that the elastic mounting portion has at least two relatively spaced-apart rebound arms, and each rebound arm of the elastic mounting portion and a corresponding one of the support portions respectively form a support shoulder.

[0015] By providing at least two supporting parts, and by connecting each end of the elastic mounting part to a corresponding supporting part, the fixing bracket has at least two rebound arms. When the magnesium rod is tightened to the mounting hole, each rebound arm will be elastically deformed, and each rebound arm will be pulled by other rebound arms when elastically deformed, thereby providing a greater rebound force. This greater rebound force can further increase the pre-tightening force on the magnesium rod.

[0016] In one of the embodiments, the inner circumference of the mounting hole has a flange, the flange is folded from the inner circumference of the mounting hole toward the inside of the mounting hole, and the inner circumference of the flange is provided with a thread for threaded connection with the screw rod.

[0017] By providing a flange that is folded from the inner circumference of the mounting hole toward the inside of the mounting hole, and providing a thread for screwing with the screw rod on the inner circumference of the flange, when the screw rod of the magnesium rod is screwed to the mounting hole, the connection area between the elastic mounting part and the screw rod can be increased, so that the connection between the magnesium rod and the elastic mounting part is more secure and not easy to shake relative to the elastic mounting part or even loosen from the elastic mounting part, thereby increasing the reliability of the connection of the magnesium rod.

[0018] In one embodiment, one end of the support portion away from the elastic mounting portion has a connection angle, and the connection angle is bent from the end of the support portion and is closely connected to the flange.

[0019] By setting a connecting angle bent from the end of the supporting part at one end of the supporting part away from the elastic mounting part, the fixing bracket can be connected to the flange through the connecting angle, thereby increasing the contact area between the fixing bracket and the flange, thereby making the connection between the fixing bracket and the flange more reliable, and effectively preventing the fixing bracket from falling off the flange.

[0020] In one of the embodiments, the flange is provided with a temperature probe tube spaced apart from the magnesium rod, and the outer wall of the temperature probe tube is provided with a support frame, and the support frame is used to connect the magnesium rod.

[0021] A support frame is arranged on the outer wall of the temperature probe tube, and the support frame is used to connect the magnesium rod. When the magnesium rod is connected to the support frame, the middle or tail of the magnesium rod can be effectively limited, thereby preventing the magnesium rod from swinging significantly due to vibration during the transportation of the electric water heater, thereby avoiding the failure of the threaded connection caused by the large swing of the magnesium rod, thereby further preventing the magnesium rod from loosening and effectively protecting the inner tank of the electric water heater.

[0022] In one embodiment, the support frame has a first end and a second end that are relatively arranged, the first end is provided with a first slot, and the temperature detection tube is embedded in the first slot; and / or the second end is provided with a second slot, and the second slot is used for embedding the magnesium rod.

[0023] By respectively opening the first slot and / or the second slot at the first end and the second end of the support frame, the temperature detection tube can be directly embedded in the first slot through the opening of the first slot, and the magnesium rod can be directly embedded in the second slot through the opening of the second slot. When the magnesium rod is installed, it can be easily embedded in the second slot of the support frame, which not only prevents the end of the magnesium rod from swinging, but also eliminates the need for tools when repairing or replacing the magnesium rod in the later stage, which is simpler and more convenient.

[0024] In one embodiment, the size of the support frame in the width direction gradually decreases from the direction in which the magnesium rod points to the temperature probe tube;

[0025] Wherein, the width direction is perpendicular to the direction in which the magnesium rod points toward the temperature probe tube.

[0026] By gradually reducing the size of the support frame in the width direction in the direction where the magnesium rod points to the temperature probe tube, the space above the flange can be fully utilized. The temperature probe tube can be installed exactly in the gap formed by the heating tube in the electric water heater, and interference between the support frame and the heating tube can be avoided, making the structure of the heating tube and magnesium rod installation structure more compact.

[0027] An electric water heater comprises a heating tube, a magnesium rod and a magnesium rod mounting structure as described in any of the above schemes, wherein the heating tube is connected to a flange of the magnesium rod mounting structure, and the magnesium rod is connected to a fixing bracket of the magnesium rod mounting structure.

[0028] The above-mentioned electric water heater, by setting up the magnesium rod mounting structure of any of the above-mentioned schemes, and by connecting the heating tube to the flange of the magnesium rod mounting structure, and connecting the magnesium rod to the fixed bracket of the magnesium rod mounting structure, reduces the connection rigidity of the magnesium rod, and does not need to use silicone gaskets or nitrile gaskets, thereby avoiding the problem of aging and failure of silicone gaskets or nitrile gaskets due to long-term immersion in high-temperature water. Not only does it utilize the elastic deformation generated by the elastic mounting part to achieve the purpose of anti-loosening, but it also improves the stability of the magnesium rod installation; it also makes the overall structure simple, effectively reduces the use of parts, is conducive to simplifying assembly, and reduces labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is an axial view of a heating tube and a magnesium rod provided in an embodiment of the present application installed on a magnesium rod mounting structure.

[0030] Figure 2 An exploded schematic diagram of a heating tube and a magnesium rod installed on a magnesium rod mounting structure provided in one embodiment of the present application.

[0031] Figure 3 This is an axial side view of a fixed bracket in a magnesium rod mounting structure provided in one embodiment of the present application.

[0032] Figure 4 This is an axial side view of a magnesium rod provided in one embodiment of the present application.

[0033] Figure 5 A cross-sectional view of a magnesium rod installation structure provided in one embodiment of the present application.

[0034] Figure 6 for Figure 5 A magnified schematic diagram of area A in the middle.

[0035] Figure 7 A top view of a heating tube and a magnesium rod installed on a magnesium rod mounting structure provided in one embodiment of the present application.

[0036] Figure 8 for Figure 7 A magnified schematic diagram of area B.

[0037] Description of reference numerals:

[0038] 100, heating tube; 200, magnesium rod installation structure; 210, flange; 220, fixing bracket; 220a, supporting shoulder; 220b, mounting hole; 221, supporting part; 2211, connecting angle; 222, elastic mounting part; 2221, rebound arm; 2222, fixing seat; 2223, flange; 230, magnesium rod; 230a, mounting end; 230b, step surface; 230c, torque groove; 231, rod body; 232, screw; 240, temperature probe tube; 250, supporting frame; 251, first end; 251a, first slot; 252, second end; 252a, second slot. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0040] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0041] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0043] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0045] As described in the background technology, in order to extend the service life of the water storage electric water heater, the water storage electric water heater on the market is usually equipped with an anode magnesium rod. The magnesium rod releases magnesium ions, which can slow down the formation of water alkali and scale, effectively prevent a large amount of scale from attaching to the inner wall of the inner tank, and slow down the corrosion of the inner tank by water alkali and scale. In some existing designs, usually only a metal bracket with a threaded hole is welded on the flange of the electric heating tube assembly, and then the threaded rod at one end of the magnesium rod is screwed into the threaded hole on the bracket, so as to directly install it on the metal bracket of the flange in a threaded connection to achieve the fixation of the magnesium rod; or an elastic gasket (such as a silicone gasket, a nitrile gasket or even a metal spring gasket, etc.) is put on the metal screw at one end of the magnesium rod, so that after the magnesium rod and the metal bracket are assembled and tightened, the elastic gasket can play an elastic anti-loosening role between the contact surface of the magnesium rod and the metal bracket.

[0046] However, the above connection structures all have certain defects. For example, when the magnesium rod is directly connected to the metal bracket through a thread, the magnesium rod and the metal bracket are often rigidly matched, and they do not have the elastic anti-loosening effect during the subsequent transportation and installation of the electric water heater. The magnesium rod is easily loosened and falls into the inner tank due to vibration. This will not only cause the magnesium rod to make a knocking sound when shaking, but also be unfavorable for protecting the inner tank, and will also affect the replacement of the magnesium rod in the later stage. When an elastic gasket is added between the magnesium rod and the metal bracket, although it can play the role of elastic anti-loosening to a certain extent, the silicone gasket and the nitrile gasket are prone to aging and failure after being soaked in hot water for a long time, which makes the electric water heater have reliability risks.

[0047] To this end, the present application provides a magnesium rod mounting structure and an electric water heater including the magnesium rod mounting structure to solve the problem of unreliable magnesium rod mounting structure in existing electric water heaters.

[0048] The following is a description of the partial structure of the electric water heater and the magnesium rod mounting structure in the present application. This embodiment is only used as an example and does not limit the technical scope of the present application. It is understood that in other embodiments, the magnesium rod mounting structure of the present application is also applicable to other water storage appliances, which is not limited here.

[0049] See also Figure 1 and Figure 2 , Figure 1 and Figure 2 A schematic diagram of a partial structure of an electric water heater provided by an embodiment of the present application is shown. An electric water heater provided by an embodiment of the present application includes an inner tank (not shown in the figure), a heating tube 100 and a magnesium rod mounting structure 200, wherein the inner tank is used to store water, and the heating tube 100 is used to heat the cold water in the inner tank by heating, so as to achieve the purpose of preparing the hot water needed by people; the magnesium rod mounting structure 200 is installed at the end of the inner tank and connected to the heating tube 100, and its function is to fix the heating tube 100 and to close the end opening of the inner tank; and the magnesium rod mounting structure 230 has a magnesium rod 230, and the magnesium rod 230 is used to release magnesium ions, so that the water alkali and scale in the inner tank of the water heater are reduced, effectively preventing a large amount of scale from being attached to the inner wall of the inner tank, avoiding corrosion to the inner tank, so as to extend the service life of the electric water heater.

[0050] In one embodiment, the magnesium rod mounting structure 200 includes a flange 210, which is installed at the opening position of the inner tank. The magnesium rod 230 and the heating tube 100 are connected to the side of the flange 210 facing the inner tank cavity. There is at least one heating tube 100, and each heating tube 100 is connected to the flange 210 in a U-shaped bend. The magnesium rod 230 is columnar and is spaced apart from the heating tube 100. When water is stored in the inner tank of the electric water heater, the heating tube 100 and the magnesium rod 230 are both immersed in the water in the inner tank, so that the magnesium rod 230 can release magnesium ions when the heating tube 100 heats the water in the inner tank, thereby avoiding corrosion to the inner tank.

[0051] Specifically, the magnesium rod 230 is mounted on the flange 210 through a fixing bracket 220. In one embodiment, see Figure 3 The fixed bracket 220 includes a support portion 221 and an elastic mounting portion 222, wherein one end of the support portion 221 is mounted on the flange 210, and the elastic mounting portion 222 is provided at the end of the support portion 221 away from the flange 210, specifically formed by bending the end of the support portion 221 away from the flange 210, and the elastic mounting portion 222 is provided with a mounting hole 220b, and one end of the magnesium rod 230 abuts against the support portion 221 and is detachably plugged into the mounting hole 220b. Preferably, the material of the fixed bracket 220 is a metal material with a certain elastic deformation and rebound ability. When the magnesium rod 230 is connected to the mounting hole 220b, the elastic mounting portion 222 can undergo a recoverable deformation, thereby providing a pre-tightening force for pre-tightening the magnesium rod 230.

[0052] In this way, through the above-mentioned arrangement, the space on the flange 210 is fully utilized, so that the magnesium rod mounting structure 200 of the above-mentioned embodiment has high integration and reduces the space occupancy rate. At the same time, by improving the fixing bracket 220, compared with the existing conventional scheme of directly rigidly connecting the magnesium rod 230 with the metal fixing bracket 220, or adding other assembly structures of components, the connection rigidity is reduced, and there is no need to use it, avoiding the problem of aging failure due to long-term immersion in high-temperature water. The elastic mounting part 222 generates elastic deformation to provide a pre-tightening force for pre-tightening the magnesium rod 230, thereby reducing the influence of vibration on the magnesium rod 230, not only achieving the purpose of preventing loosening, but also improving the reliability and stability of the installation of the magnesium rod 230.

[0053] More specifically, in one embodiment, in combination Figure 4 and Figure 5As shown, the magnesium rod 230 includes a rod body 231 and a screw rod 232, one end of the rod body 231 is the mounting end 230a of the magnesium rod 230, and the screw rod 232 is arranged at the mounting end 230a. The outer circumferential surface of the screw rod 232 is provided with a thread, and the outer diameter of the screw rod 232 is smaller than the outer diameter of the rod body 231, so that the screw rod 232 and the rod body 231 form a step surface 230b at the mounting end 230a, and correspondingly, the inner circumferential surface of the mounting hole 220b is also provided with a thread. When the magnesium rod 230 is mounted on the fixed bracket 220, the screw rod 232 and the mounting hole 220b are mutually threadedly connected. And because the elastic mounting portion 222 is formed by bending one end of the support portion 221 away from the flange 210, a protruding support shoulder 220a is formed at the connection position between the elastic mounting portion 222 and the support portion 221, and the support shoulder 220 and the mounting hole 220b are staggered in the axial direction of the mounting hole 220b. When the screw 232 of the magnesium rod 230 is threadedly connected to the mounting hole 220b, the step surface 230b formed by the rod body 231 of the magnesium rod 230 and the screw 232 abuts against the support shoulder 220a (that is, the mounting end 230a of the magnesium rod 230 abuts against one end of the support portion 211, more specifically, abuts against the support shoulder 220a), and the elastic mounting portion 222 will be subjected to the force of the screw 232, thereby producing elastic deformation.

[0054] Furthermore, combined with Figure 3 and Figure 5 As shown, the elastic support portion 221 includes a rebound arm 2221 and a fixed seat 2222 that are integrally connected. One end of the rebound arm 2221 is integrally connected to the support portion 221, and extends downwardly from one end of the support portion 221 away from the flange 210, so that the rebound arm 2221 forms an inclined beam; the other end of the rebound arm 2221 is connected to the fixed seat 2222, and the fixed seat 2222 is bent and extended from one end of the rebound arm 2221 away from the support portion 221, so that the fixed seat 2222 is recessed relative to the support shoulder 220a, and the mounting hole 220b is formed by punching or punching a hole on the fixed portion with a tapping tool, and tapping the thread. Preferably, the fixing seat 2222 and the supporting portion 221 are perpendicular to each other, that is, when the magnesium rod mounting structure 200 is placed in the vertical direction, the supporting portion 221 extends in the vertical direction and the fixing seat 2222 extends in the horizontal direction, so that the screw 232 can be perpendicular to the fixing seat 2222 when it is threadedly connected to the mounting hole 220b, thereby connecting the magnesium rod 230 to the elastic mounting portion 222 to make the connection more secure.

[0055] Furthermore, if Figure 3As shown, there are two support parts 221, and the two support parts 221 are arranged at intervals on the flange 210. The elastic mounting part 222 has two rebound arms 2221 arranged relatively at intervals. The opposite ends of the fixed seat 2222 are respectively connected to a rebound arm 2221, and each rebound arm 2221 is connected to a corresponding support part 221 and is respectively formed with a support shoulder 220a. In this way, the fixed bracket 220 of the above embodiment is M-shaped and can be stamped by an integrated stamping process, so that the manufacturing process of the fixed bracket 220 is simple and has good integrity. When the magnesium rod 230 is assembled and tightened to the fixed bracket 220, the two rebound arms 2221 are elastically deformed. Each rebound arm 2221 will be pulled by the other rebound arm 2221 when elastic deformation occurs, thereby providing a greater rebound force. This greater rebound force can further increase the pre-tightening force on the magnesium rod 230, thereby reducing the connection rigidity between the magnesium rod 230 and the fixed bracket 220, and playing a role in preventing loosening without the aid of spring washers.

[0056] It is understandable that the shape of the fixed bracket 220 is not limited to the M-shape shown in the embodiment of the figure, that is, the number of the support parts 221 is not limited to the two shown in the embodiment of the figure, and can also be three, four or more. Correspondingly, the elastic mounting part 222 can also have multiple ends, and the specific number depends on the number of the support parts 221, and there is no special limitation here. When the number of the support parts 221 is multiple, and the ends of the elastic mounting part 222 are multiple, the shape of the fixed bracket 220 is deformed into a structure of multiple M-shaped intersections, but no matter how many the numbers of the ends of the support parts 221 and the elastic mounting part 222 are, the elastic mounting part 222 can be elastically deformed and can provide a pre-tightening force for the magnesium rod 230 when the screw 232 of the magnesium rod 230 is assembled and tightened to the mounting hole 220b, so that the anti-loosening effect can be achieved without the use of elastic washers.

[0057] As an improved implementation, see Figure 4 The rod body 231 of the magnesium rod 230 is provided with a torsion groove 230c at the end away from the screw rod 232. The purpose of providing the torsion groove 230c is to facilitate tools such as a torque air screwdriver to be inserted into the torsion groove 230c to apply torque to the magnesium rod 230, so that the magnesium rod 230 can be tightened and fixed on the fixing bracket 220 with relatively little effort. When the torque air screwdriver is twisted, the depth of the magnesium rod 230 being screwed into the mounting hole 220b by the torque gradually increases, and the tension on the fixing seat 2222 also gradually increases and is transmitted to the rebound arm 2221. The elastic deformation of the rebound arm 2221 also gradually increases, so that the elastic mounting portion 222 can generate a certain rebound force, and the rebound force can pre-tighten the magnesium rod 230, thereby preventing the magnesium rod 230 from loosening.

[0058] Preferably, in order to increase the connection reliability between the screw rod 232 of the magnesium rod 230 and the elastic mounting portion 222, refer to Figure 5 The inner periphery of the mounting hole 220b has a flange 2223, which is folded from the inner periphery of the mounting hole 220b toward the inside of the mounting hole 220b, and the thread for threaded connection with the screw 232 of the magnesium rod 230 is provided on the inner periphery of the flange 2223. In this way, the connection area between the elastic mounting part 222 and the screw 232 of the magnesium rod 230 is increased, making the connection between the magnesium rod 230 and the elastic mounting part 222 more secure, and further making it less likely for the magnesium rod 230 to shake relative to the elastic mounting part 222 or even loosen from the elastic mounting part 222 during the transportation of the electric water heater, further increasing the reliability of the connection of the magnesium rod 230.

[0059] It should be noted that in other embodiments, it is not limited to increasing the connection area between the screw 232 and the elastic mounting portion 222 by setting a flange 2223 on the inner periphery of the mounting hole 220b. The same purpose can also be achieved by first punching a hole in the fixing seat 2222 with a punch and then welding a nut on the back side of the punched hole.

[0060] In addition, in order to increase the connection reliability between the support portion 221 and the flange 210, please continue to refer to Figure 3 and Figure 5 Each support portion 221 has a connection angle 2211 at one end away from the elastic mounting portion 222, and the connection angle 2211 is bent from the end of the support portion 221 and is closely connected to the flange 210. In this way, the support portion 221 is L-shaped, so that the contact area between the fixing bracket 220 and the flange 210 is increased, thereby making the connection between the fixing bracket 220 and the flange 210 more reliable, and can effectively prevent the fixing bracket 220 from falling off the flange 210.

[0061] It should be noted that in the above embodiment, when the supporting portion 221 has two or more, so that the fixed bracket 220 has two or more supporting shoulders 220a, and the fixed bracket 220 has two or more connecting corners 2211, the two or more supporting shoulders 220a can be located at the same height or different heights, and the two or more connecting corners 2211 can also be located at the same height or different heights, and there is no special limitation here.

[0062] It is worth noting that although the screw 232 of the magnesium rod 230 can be fixed to the fixed bracket 220 by being threadedly connected to the mounting hole 220b of the elastic mounting portion 222, and the elastic mounting portion 222 can produce elastic deformation and provide a pre-tightening force to pre-tighten the magnesium rod 230, thereby preventing the magnesium rod 230 from loosening, the tail of the magnesium rod 230 may still swing significantly during the transportation and installation of the electric water heater due to the long length of the magnesium rod 230. Therefore, it is necessary to further prevent the tail of the magnesium rod 230 from swinging significantly, and completely avoid the possibility of the tail of the magnesium rod 230 swinging significantly and causing impact on the inner tank.

[0063] In order to solve this problem, the inventor of the present application has thought of fixing the middle or tail of the magnesium rod 230 to prevent the tail of the magnesium rod 230 from swinging greatly. Figure 1 and Figure 2 In one embodiment, a temperature probe tube 240 is provided on one side of the flange 210, which is parallel to the magnesium rod 230 and spaced apart from the magnesium rod 230. The temperature probe tube 240 is a hollow stainless steel tube with one end closed and the other end open. The open end is welded to the flange 210 and communicates with the outside world. A temperature sensor is installed inside the temperature probe tube 240. Its function is to measure the water temperature when the heating tube 100 heats the water in the inner tank, so as to facilitate the control of the heating temperature of the electric heating tube 100. Because of the existence of the temperature probe tube 240, therefore, refer to Figure 1 and Figure 7 The outer wall of the temperature probe tube 240 is provided with a support frame 250, and the support frame 250 is connected to the rod body 231 of the magnesium rod 230. In this way, by limiting the middle or tail of the magnesium rod 230 by the support frame 250, the purpose of limiting the end swing of the magnesium rod 230 due to vibration during the transportation of the electric water heater is achieved, and the failure of the threaded connection caused by the shaking of the magnesium rod 230 is avoided, so that the magnesium rod 230 can be further prevented from loosening, and the inner tank of the electric water heater can be effectively protected.

[0064] For details on the connection method between the magnesium rod 230 and the support frame 250, please continue to refer to Figure 7The support frame 250 has a first end 251 and a second end 252 that are relatively arranged. The edge of the first end 251 is provided with a first slot 251a that matches the outer peripheral surface contour of the temperature detection tube 240. The first slot 251a runs through the opposite sides of the support frame 250, and the temperature detection tube 240 is clamped in the first slot 251a. The edge of the second end 252 is provided with a second slot 252a that matches the outer peripheral surface contour of the rod body 231 of the magnesium rod 230. The second slot 252a also runs through the opposite sides of the support frame 250, and the rod body 231 of the magnesium rod 230 is clamped in the second slot 252a. In the embodiment shown in the figure, since the temperature probe tube 240 and the rod body 231 of the magnesium rod 230 are both cylindrical, the contours of the first slot 251a and the second slot 252a are both arc-shaped, so that the temperature probe tube 240 can be directly connected to the first slot 251a through the opening of the first slot 251a, and the magnesium rod 230 can be directly connected to the second slot 252a through the opening of the second slot 252a. In this way, after the screw 232 of the magnesium rod 230 is threadedly connected to the mounting hole 220b of the fixed bracket 220, the rod body 231 of the magnesium rod 230 can also be easily embedded in the second slot 252a of the support frame 250, which can not only prevent the end of the magnesium rod 230 from swinging, but also can be repaired or replaced in the later stage without the help of tools, which is simpler and more convenient.

[0065] It is understandable that the way in which the temperature probe tube 240 or the magnesium rod 230 is connected to the support frame 250 is not limited to the embodiment shown in the figure, and can also be connected by gluing, magnetic connection, etc., and there is no special limitation here.

[0066] Further, in order to make full use of the space and avoid interference between the support frame 250 and the heating tube 100, refer to Figure 8 In the direction from the magnesium rod 230 to the temperature probe tube 240, the size of the support frame 250 in the width direction gradually decreases, wherein the width direction refers to the direction perpendicular to the magnesium rod 230 pointing to the temperature probe tube 240 (i.e. Figure 8 In this way, the space above the flange 210 is fully utilized, the temperature probe tube 240 can be installed in the gap formed by the heating tube 100, and the interference between the support frame 250 and the heating tube 100 can be avoided, so that the structure of the heating tube 100 and the magnesium rod installation structure 200 is more compact.

[0067] The following combined Figures 1 to 8 , the assembly process of the magnesium rod mounting structure 200 provided in the present application and the installation process of the magnesium rod 230 to the magnesium rod mounting structure 200 are introduced:

[0068] First, the connection corner 2211 of the fixing bracket 220 is positioned at a designated position of the flange 210 facing the inner tank, and then fixed by welding or other methods, so that the fixing bracket 220 is fixedly installed on the flange 210 .

[0069] Then, the magnesium rod 230 is passed through the second slot 252a of the support frame 250, and the screw 232 at one end of the magnesium rod 230 is aligned with the mounting hole 220b of the fixing bracket 220 for pre-tightening, so that part of the screw 232 is inserted into the mounting hole 220b of the fixing bracket 220.

[0070] Next, use a torque screwdriver to clamp the torsion groove 230c of the magnesium rod 230 and apply a certain torque to tighten the magnesium rod 230. During the tightening process, first, make the support shoulder 220a of the bracket contact the step formed by the rod body 231 of the magnesium rod 230 and the screw 232, so that the support shoulder 220a can support the magnesium rod 230 with force. At the same time, the fixing seat 2222 on the fixed bracket 220 is also subjected to the pulling force of the screw 232 during the process of the screw 232 of the magnesium rod 230 rotating and penetrating into the mounting hole 220b. In this process, the pulling force on the fixing seat 2222 is gradually increased and transmitted to the rebound arm 2221, causing the rebound arm 2221 to undergo elastic deformation, so that the rebound arm 2221 can provide a certain rebound force, and this rebound force can be converted into a pre-tightening force for pre-tightening the magnesium rod 230, thereby reducing the connection rigidity between the magnesium rod 230 and the fixed bracket 220, thereby playing an anti-loosening role.

[0071] After completing the tightening operation of the magnesium rod 230, one end of the magnesium rod 230 is fixed on the fixed bracket 220, and finally the rod body 231 of the magnesium rod 230 is embedded in the second slot 252a through the opening of the second slot 252a, thereby limiting the tail of the magnesium rod 230, limiting the large swing of the end of the magnesium rod 230 caused by vibration during transportation, and further preventing the magnesium rod 230 from loosening from the fixing seat 2222.

[0072] Finally, it should be noted that the various technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the various technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A magnesium rod installation structure, characterized in that: include: Flange (210); a fixed bracket (220), the fixed bracket (220) comprising a supporting portion (221) and an elastic mounting portion (222), one end of the supporting portion (221) being mounted on the flange (210), the elastic mounting portion (222) being arranged at an end of the supporting portion (221) away from the flange (210), and the elastic mounting portion (222) being provided with a mounting hole (220b); A magnesium rod (230), the magnesium rod (230) having a mounting end (230a), the mounting end (230a) being provided with a screw rod (232), the screw rod (232) passing through the mounting hole (220b) and being threadedly connected to the elastic mounting portion (222); the mounting end (230a) abuts against the support portion (221).

2. The magnesium rod installation structure according to claim 1, characterized in that: The elastic mounting portion (222) and the support portion (221) form an included angle, so that a protruding support shoulder (220a) is formed at the connection position between the elastic mounting portion (222) and the support portion (221), the support shoulder (220a) and the mounting hole (220b) are offset in the axial direction of the mounting hole (220b), and the mounting end (230a) abuts against the support shoulder (220a).

3. The magnesium rod installation structure according to claim 2, characterized in that: The elastic mounting portion (222) comprises a rebound arm (2221) and a fixing seat (2222) which are integrally connected; one end of the rebound arm (2221) is connected to the supporting portion (221), and the other end is connected to the fixing seat (2222); the fixing seat (2222) is bent and extended from one end of the rebound arm (2221) away from the supporting portion (221), so that the fixing seat (2222) is recessed relative to the supporting shoulder (220a); and the mounting hole (220b) is provided on the fixing seat (2222).

4. The magnesium rod installation structure according to claim 3, characterized in that: The support parts (221) have at least two, the elastic mounting part (222) has at least two resilient arms (2221) arranged relatively and spaced apart, and each resilient arm (2221) of the elastic mounting part (222) is connected to a corresponding one of the support parts (221) and is respectively formed with the support shoulder (220a).

5. The magnesium rod installation structure according to claim 1 or 2, characterized in that: The inner circumference of the mounting hole (220b) comprises a flange (2223), the flange (2223) being folded from the inner circumference of the mounting hole (220b) toward the inside of the mounting hole (220b), and the inner circumferential surface of the flange (2223) is provided with a thread for being screwed to the screw rod (232).

6. The magnesium rod installation structure according to claim 1, characterized in that: One end of the support portion (221) away from the elastic mounting portion (222) has a connection corner (2211), and the connection corner (2211) is bent from the end of the support portion (221) and is closely connected to the flange (210).

7. The magnesium rod installation structure according to claim 1, characterized in that: The flange (210) is provided with a temperature detection tube (240) spaced apart from the magnesium rod (230), and an outer wall of the temperature detection tube (240) is provided with a support frame (250), and the support frame (250) is connected to the magnesium rod (230).

8. The magnesium rod installation structure according to claim 7, characterized in that: The support frame (250) has a first end (251) and a second end (252) arranged opposite to each other, the first end (251) being provided with a first slot (251a), the temperature detection tube (240) being embedded in the first slot (251a); and / or the second end (252) being provided with a second slot (252a), the second slot (252a) being used for embedding the magnesium rod (230).

9. The magnesium rod installation structure according to claim 7, characterized in that: From the direction from the magnesium rod (230) to the temperature probe tube (240), the size of the support frame (250) in the width direction gradually decreases; The width direction is perpendicular to the direction of the magnesium rod (230) pointing towards the temperature detection tube (240).

10. An electric water heater, characterized in that: The electric water heater comprises a heating tube (100) and a magnesium rod mounting structure (200) according to any one of claims 1 to 9, wherein the heating tube (100) is connected to the flange (210).

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