Electric water heater

Abstract

The utility model relates to the technical field of water heaters, in particular to an electric water heater which comprises a box body, a heat exchange assembly, a heater and a communicating pipe, and the box body is provided with a cavity used for containing a heating medium; the heat exchange assembly is arranged in the cavity of the box body and comprises a heat exchange pipe, the heat exchange pipe is provided with a water inlet and a water outlet, the water inlet is used for being communicated with an external water source, and the water outlet is used for being connected with an external water using device; the heater is arranged in the cavity of the box body and is used for heating the heating medium in the box body; the communicating pipe is arranged on the box body and used for communicating the cavity with the external space of the box body, and a check valve is arranged on the communicating pipe; when the pressure in the cavity reaches a threshold value, the check valve is opened to enable the cavity to be communicated with the external space; when the pressure in the cavity is lower than the threshold value, the check valve is closed so that the cavity can be isolated from the external space, the electric water heater can avoid the problem that bathing water breeds bacteria and is polluted, and meanwhile the problems that the shape of the box body is fixed and the occupied space is large can be solved.

Description

Technical Field

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

[0002] Storage electric water heaters are divided into open type and closed type: the open type is connected to the atmosphere, the water tank is not under pressure, the water inside the tank is easy to breed bacteria, causing water pollution; the closed type water tank is under pressure, generally needs to be made into a round single tank or a thin double tank, the shape is relatively fixed, and it takes up a large space. Utility Model Content

[0003] The purpose of the present application is to provide an electric water heater, which can avoid the problem of bacteria breeding and contamination of bathing water, and at the same time solve the problem of a fixed box shape and a large occupied space.

[0004] To this end, an embodiment of the present application provides an electric water heater, comprising: a box body, having a cavity for accommodating a heating medium; a heat exchange component, arranged in the cavity of the box body, a heat exchange tube of the heat exchange component, the heat exchange tube having a water inlet and a water outlet, the water inlet being used to connect to an external water source, and the water outlet being used to connect to an external water user; a heater, arranged in the cavity of the box body, for heating the heating medium in the box body; and a connecting pipe, arranged on the box body, for connecting the cavity and the external space of the box body, the connecting pipe being provided with a check valve; wherein, when the pressure in the cavity reaches a threshold value, the check valve opens to connect the cavity with the external space; when the pressure in the cavity is lower than the threshold value, the check valve closes to isolate the cavity from the external space.

[0005] In a possible implementation, the check valve is made of elastic material, one end of the check valve is connected to the connecting pipe, and the other end is provided with a flat mouth in a normally closed state. When the pressure in the cavity reaches a threshold, the flat mouth opens.

[0006] In a possible implementation, the electric water heater further includes a liquid replenishing pipe disposed on the tank body for replenishing heating medium into the cavity, one end of the connecting pipe is located in the top space of the cavity, and the other end is located below the tank body.

[0007] In a possible implementation, an integrated joint is provided on the box body, and the water inlet, the water outlet and the liquid replenishing pipe of the heat exchange tube are integrated on the integrated joint.

[0008] In a possible implementation, the electric water heater further includes a temperature measuring tube disposed in the cavity for detecting the temperature of the heating medium.

[0009] In a possible implementation, the box body includes a barrel body, a top cover arranged on the top of the barrel body, and a bottom cover arranged on the bottom of the barrel body, and the temperature measuring tube, the heater, the connecting tube and the heat exchange component are arranged on the bottom cover.

[0010] In a possible implementation, the heat exchange assembly further includes a fixing frame, and the heat exchange tube is disposed on the fixing frame.

[0011] In a possible implementation, the fixing frame includes a frame body and a shock absorbing block disposed on the frame body, and a clamping groove for clamping the heat exchange tube is disposed on the shock absorbing block.

[0012] In a possible implementation, a fixing groove is provided on the frame, and the shock absorbing block is clamped in the fixing groove.

[0013] In a possible implementation, the box body is a flat rectangular parallelepiped structure.

[0014] According to the electric water heater provided in the embodiment of the present application, the interior of the box is connected with the external space through a connecting pipe. The box is not under pressure and can be made into different shapes, thereby solving the problem of the box shape being fixed and occupying a large space. The check valve can be used to isolate the inside of the box from the outside at normal times, so that the box remains in a relatively closed state, thereby avoiding the problem of bacteria breeding and contamination of bathing water. Moreover, bathing water enters and exits the box through the heat exchange tube and will not mix with the heating medium in the box, further ensuring the cleanliness of the bathing water. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0018] Figure 1 A schematic diagram of an explosion structure of an electric water heater provided in an embodiment of the present application is shown;

[0019] Figure 2 A schematic diagram showing the structure of the electric water heater provided in an embodiment of the present application after the top cover and the barrel are removed;

[0020] Figure 3 A schematic diagram of the three-dimensional structure of an electric water heater provided in an embodiment of the present application is shown;

[0021] Figure 4 A schematic diagram showing the structure of a connecting pipe and a check valve provided in an embodiment of the present application is shown;

[0022] Figure 5 Show Figure 4 A local enlarged structural schematic diagram;

[0023] Figure 6 A schematic diagram of a three-dimensional structure of a fixing frame provided in an embodiment of the present application is shown;

[0024] Figure 7 A schematic structural diagram of a shock absorbing block provided in an embodiment of the present application is shown.

[0025] Description of reference numerals:

[0026] 1. Box body; 11. Integrated joint; 12. Barrel body; 13. Top cover; 14. Bottom cover;

[0027] 2. heat exchange assembly; 21. heat exchange tube; 211. water inlet; 212. water outlet; 22. fixing frame; 221. frame body; 2211. fixing groove; 222. shock absorbing block; 2221. card slot; 2222. slide groove;

[0028] 3. Heater; 4. Connecting pipe; 5. Check valve; 51. Flat nozzle; 6. Liquid replenishing pipe; 7. Temperature measuring tube. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0030] The disclosure below provides many different embodiments or examples to realize the different structures of the embodiments of the present application. In order to simplify the disclosure of the embodiments of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present application. In addition, the embodiments of the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0031] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0032] In order to solve the problems in the prior art, the present application provides an electric water heater, which can prevent the problem of bathing water being contaminated by bacteria and can also solve the problem of a fixed box shape and a large occupied space.

[0033] like Figure 1-7 As shown, an embodiment of the present application provides an electric water heater, comprising: a housing 1 having a cavity for accommodating a heating medium; a heat exchange component 2, arranged in the cavity of the housing 1, a heat exchange tube 21 of the heat exchange component 2, the heat exchange tube 21 having a water inlet 211 and a water outlet 212, the water inlet 211 being used to connect to an external water source, and the water outlet 212 being used to connect to an external water user; a heater 3, arranged in the cavity of the housing 1, for heating the heating medium in the housing 1; and a connecting pipe 4, arranged on the housing 1, for connecting the cavity and an external space of the housing 1, a check valve 5 being arranged on the connecting pipe 4; wherein, when the pressure in the cavity reaches a threshold value, the check valve 5 is opened to connect the cavity with the external space; when the pressure in the cavity is lower than the threshold value, the check valve 5 is closed to isolate the cavity from the external space. Specifically, the heater 3 is arranged at the bottom of the box 1. During the heating process, the heating medium with a higher temperature flows upward, and the heating medium with a lower temperature flows downward, thereby forming a reflux in the box 1, so that the temperature of the heating medium in the box 1 is relatively uniform.

[0034] In the present application, the interior of the box 1 is connected with the external space through the connecting pipe 4. The box 1 is not under pressure, so it can be made into different shapes, thereby solving the problem that the box 1 has a fixed shape and occupies a large space. The check valve 5 can be used to isolate the inside of the box 1 from the outside at normal times, so that the box 1 remains in a relatively closed state, thereby avoiding the problem of bacteria breeding and contamination of bathing water. Moreover, bathing water enters and exits the box 1 through the heat exchange tube 21 and will not mix with the heating medium in the box 1, further ensuring the cleanliness of the bathing water.

[0035] In the related art, the existing water storage electric water heaters are divided into open type and closed type. The open type is connected to the atmosphere, and the water tank is not under pressure. The water used for bathing inside is easy to breed bacteria and the water quality is easily polluted, which is harmful to health. Moreover, the open type electric water heater is not under pressure, and relies on the pressure spraying suspended at a high place, so the bathing water flow is small and the comfort is poor, or it is pressurized by a booster pump, which is costly and prone to failure. The closed type electric water heater is under pressure, so it generally needs to be made into a round single tank or a thin double tank, which has a relatively fixed shape and occupies a large space. Moreover, the water used for bathing is stagnant water, and dirt such as mud, magnesium rod residue, and scale are easily deposited in the inner tank.

[0036] In the electric water heater provided in the embodiment of the present application, the housing 1 is connected to the external space through the connecting pipe 4, so that the housing 1 can be free of pressure. The inside of the housing 1 can be isolated from the external space by the check valve 5 at ordinary times to prevent the heating medium in the housing 1 from being contaminated and breeding bacteria. The heating medium in the housing 1 is heated by the heater 3, and the heating medium then heats the bathing water in the heat exchange tube 21. The bathing water is completely isolated from the heating medium, which can further ensure the cleanliness of the bathing water. And the external impurities will not enter the housing 1 to pollute the heating medium in the housing 1. Only when the pressure in the housing 1 rises to the threshold value, the check valve 5 will be opened. At this time, only the gas of the heating medium overflows from the check valve 5, and there will be no situation where impurities enter the housing 1 through the check valve 5. Moreover, the water inlet 211 of the heat exchange tube 21 is directly connected to the tap water pipe, and the tap water pipe itself has a certain water pressure, so the water flow rate of the bathing water can be guaranteed, and the comfort can be guaranteed, and there is no need to install a booster pump to increase the pressure, which reduces the cost and the failure rate.

[0037] Among them, the external water heater is a secondary electric heater. The electric water heater in this application preheats the water so that the water can maintain a higher temperature of about 30℃-40℃ before entering the secondary electric heater, and then heats the water to the required temperature through the subsequent secondary electric heater. Of course, the external water heater can also be a sprinkler head, etc. The electric water heater in this application heats the water and is directly used by the user.

[0038] In some embodiments, the check valve 5 is made of elastic material, one end of the check valve 5 is connected to the connecting pipe 4, and the other end is provided with a flat mouth 51 in a normally closed state. When the pressure in the cavity reaches a threshold, the flat mouth 51 opens.

[0039] like Figure 4 As shown, in the present application, the check valve 5 can be made of rubber material, and the flat mouth 51 is in a normally closed state to prevent external impurities from entering the box body 1 through the check valve 5. Because the heating medium inside the box body 1 needs to be heated, the pressure inside the box body 1 will increase. When the pressure inside the box body 1 increases to a threshold value, the flat mouth 51 of the check valve 5 will be stretched open to release the pressure. After the pressure is released, the flat mouth 51 returns to its original state under the action of its own elasticity.

[0040] Specifically, the heating medium in the box 1 can be water, and as the water is heated, a certain amount of water vapor will be generated, thereby increasing the pressure in the box 1. Of course, the heating medium can also be other heat exchange liquids.

[0041] In some embodiments, the electric water heater further includes a liquid replenishing pipe 6 disposed on the housing 1 for replenishing heating medium into the cavity. One end of the connecting pipe 4 is located in the top space of the cavity, and the other end is located below the housing 1 .

[0042] In the present application, heating medium can be replenished into the box body 1 through the liquid replenishment pipe 6 to ensure the heat storage capacity of the heating medium, thereby ensuring the heat exchange effect with the heat exchange tube 21. When the heating medium in the box body 1 is added to a certain liquid level, the heating medium can enter the connecting pipe 4, so that the heating medium in the connecting pipe 4 opens the check valve 5 and is discharged. The connecting pipe 4 and the check valve 5 can also control the liquid level of the heating medium in the box body 1.

[0043] In some embodiments, an integrated joint 11 is provided on the box body 1 , and the water inlet 211 , the water outlet 212 and the liquid replenishing tube 6 of the heat exchange tube 21 are integrated on the integrated joint 11 .

[0044] like Figure 2 As shown, in the present application, the water inlet 211, the water outlet 212 and the liquid replenishing tube 6 of the heat exchange tube 21 are integrated on the integrated joint 11. Specifically, the heat exchange tube 21 and the liquid replenishing tube 6 are welded and sealed with the integrated joint 11, thereby ensuring the sealing of the box body 1 and reducing the position of penetrating the box body 1.

[0045] In some embodiments, the electric water heater further comprises a temperature measuring tube 7 disposed in the cavity for detecting the temperature of the heating medium.

[0046] In the present application, the temperature measuring tube 7 detects the temperature of the heating medium in the box 1, and cooperates with the heater 3 to control the temperature of the heating medium in the box 1, so that the temperature rise of the bath in the heat exchange tube 21 can be more accurately controlled. Specifically, the temperature measuring probe of the temperature measuring tube 7 is located in the upper space of the box 1. When the water level in the water tank is insufficient and is located below the temperature measuring probe, the temperature detected by the temperature measuring probe will suddenly rise, thereby reminding the user to add water or turn off the heater 3. The problem of dry burning in the water tank can be prevented by real-time temperature measurement.

[0047] In some embodiments, the box body 1 includes a barrel body 12, a top cover 13 arranged on the top of the barrel body 12, and a bottom cover 14 arranged on the bottom of the barrel body 12, and the temperature measuring tube 7, the heater 3, the connecting pipe 4 and the heat exchange component 2 are arranged on the bottom cover 14.

[0048] In the present application, the box body 1 includes a barrel body 12 in the middle, a top cover 13 at the top, and a bottom cover 14 at the bottom. The temperature measuring tube 7, the heater 3, the connecting pipe 4, and the heat exchange component 2 are integrated on the bottom cover 14 for easy assembly. The bottom cover 14 with the temperature measuring tube 7, the heater 3, the connecting pipe 4, and the heat exchange component 2 installed is welded and sealed with the barrel body 12, and the top cover 13 is later sealed with the barrel body 12, so that the inside of the box body 1 becomes a relatively closed space.

[0049] In some embodiments, the heat exchange assembly 2 further includes a fixing frame 22 , and the heat exchange tube 21 is disposed on the fixing frame 22 .

[0050] In the present application, the fixing frame 22 is fixedly disposed on the bottom cover 14 , and the heat exchange tube 21 is supported and fixed by the fixing frame 22 to ensure the stability of the heat exchange tube 21 .

[0051] In some embodiments, the fixing frame 22 includes a frame body 221 and a shock absorbing block 222 disposed on the frame body 221 . The shock absorbing block 222 is provided with a clamping groove 2221 for clamping the heat exchange tube 21 .

[0052] In the present application, in order to ensure strength, the frame 221 and the heat exchange tube 21 are both made of metal. Noise and wear are easily generated due to vibration during transportation and use. The heat exchange tube 21 is fixed by the shock-absorbing block 222, which can effectively avoid the wear and noise caused by the collision of metal parts.

[0053] Moreover, the shock absorbing block 222 clamps the heat exchange tube 21 through the clamping groove 2221, which facilitates the assembly and fixation of the heat exchange tube 21. Specifically, the shock absorbing block 222 can be made of rubber, plastic or nylon, the notch of the clamping groove 2221 is smaller than the outer diameter of the heat exchange tube 21, and the inner diameter of the clamping groove 2221 is equal to the outer diameter of the heat exchange tube 21. It is necessary to press so that the heat exchange tube 21 passes through the notch of the clamping groove 2221 and enters the clamping groove 2221 to ensure the fixing effect of the heat exchange tube 21.

[0054] like Figure 6-7 As shown, in some embodiments, a fixing groove 2211 is provided on the frame 221 , and the shock absorbing block 222 is clamped in the fixing groove 2211 .

[0055] In the present application, the fixing groove 2211 on the frame 221 is a U-shaped groove, and the damping block 222 is provided with a slide groove 2222 on both sides, and the damping block 222 is connected to the frame 221 by inserting the slide groove 2222 into the fixing groove 2211 of the frame 221, so as to facilitate assembly. The damping block 222 and the frame 221 can be fixed by friction, or glue can be provided between the frame 221 and the damping block 222 for bonding and fixing.

[0056] Specifically, two frames 221 are arranged relatively, and a plurality of fixing grooves 2211 are arranged at equal intervals on the frame 221. The shock absorbing block 222 can be assembled and fixed to the frame 221 by sliding into the fixing groove 2211 through the slide groove 2222, which can ensure the horizontality of the shock absorbing blocks 222 at the same height, thereby ensuring the fixing effect on the heat exchange tube 21. In the actual assembly process, the heat exchange tube 21 and the shock absorbing block 222 can be clamped first, and after all the shock absorbing blocks 222 are installed, the position of the shock absorbing block 222 is adjusted along the axial direction of the heat exchange tube 21, and then the shock absorbing block 222 is slidably inserted into the fixing groove 2211. The fixing groove 2211 plays a role of limiting the shock absorbing block 222, thereby ensuring the clamping effect on the heat exchange tube 21 and preventing the heat exchange tube 21 from loosening.

[0057] In some embodiments, the box body 1 is a flat rectangular parallelepiped structure.

[0058] In the present application, since the connecting pipe 4 connects the inside of the box 1 with the outside, the box 1 is not under pressure, and the shape of the box 1 can be designed. In a preferred embodiment, by setting the box 1 to a flat rectangular structure, the space occupied by the box 1 in the thickness direction can be effectively reduced.

[0059] The electric water heater connects the interior of the box 1 with the external space through a connecting pipe 4. The box 1 is not under pressure, so it can be made into different shapes, thereby solving the problem that the box 1 has a fixed shape and occupies a large space. The check valve 5 can be used to isolate the inside of the box 1 from the outside at normal times, so that the box 1 remains in a relatively closed state, thereby avoiding the problem of bacteria breeding and contamination of bathing water. Moreover, bathing water enters and exits the box 1 through the heat exchange tube 21 and will not mix with the heating medium in the box 1, further ensuring the cleanliness of the bathing water.

[0060] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0061] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0062] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. An electric water heater, characterized in that: include: A box (1) having a cavity for accommodating a heating medium; A heat exchange component (2) is arranged in the cavity of the housing (1); the heat exchange component (2) has a heat exchange tube (21); the heat exchange tube (21) has a water inlet (211) and a water outlet (212); the water inlet (211) is used to connect to an external water source; and the water outlet (212) is used to connect to an external water user; a heater (3), arranged in the cavity of the box (1) and used for heating the heating medium in the box (1); and A connecting pipe (4) is arranged on the box body (1) and is used to connect the cavity with the external space of the box body (1); a check valve (5) is arranged on the connecting pipe (4); When the pressure in the cavity reaches a threshold value, the check valve (5) opens to connect the cavity with the external space; when the pressure in the cavity is lower than the threshold value, the check valve (5) closes to isolate the cavity from the external space.

2. The electric water heater according to claim 1, characterized in that: The check valve (5) is made of elastic material. One end of the check valve (5) is connected to the connecting pipe (4), and the other end is provided with a flat mouth (51) in a normally closed state. When the pressure in the cavity reaches the threshold value, the flat mouth (51) opens.

3. The electric water heater according to claim 1, characterized in that: The electric water heater also includes a liquid replenishing pipe (6) arranged on the box (1) for replenishing heating medium into the cavity; one end of the connecting pipe (4) is located in the top space of the cavity, and the other end is located below the box (1).

4. The electric water heater according to claim 3, characterized in that: An integrated joint (11) is provided on the box body (1), and the water inlet (211), the water outlet (212) of the heat exchange tube (21) and the liquid replenishing tube (6) are integrated on the integrated joint (11).

5. The electric water heater according to claim 3, characterized in that: The electric water heater also includes a temperature measuring tube (7) arranged in the cavity and used for detecting the temperature of the heating medium.

6. The electric water heater according to claim 5, characterized in that: The box body (1) comprises a barrel body (12), a top cover (13) arranged on the top of the barrel body (12), and a bottom cover (14) arranged on the bottom of the barrel body (12); the temperature measuring tube (7), the heater (3), the connecting tube (4) and the heat exchange component (2) are arranged on the bottom cover (14).

7. The electric water heater according to claim 1, characterized in that: The heat exchange component (2) further comprises a fixing frame (22), and the heat exchange tube (21) is arranged on the fixing frame (22).

8. The electric water heater according to claim 7, characterized in that: The fixing frame (22) comprises a frame body (221) and a shock absorbing block (222) arranged on the frame body (221); the shock absorbing block (222) is provided with a clamping groove (2221) for clamping the heat exchange tube (21).

9. The electric water heater according to claim 8, characterized in that: The frame (221) is provided with a fixing groove (2211), and the shock absorbing block (222) is clamped in the fixing groove (2211).

10. The electric water heater according to claim 1, characterized in that: The box body (1) is a flat rectangular parallelepiped structure.

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