Water heater

Abstract

The utility model discloses a water heater, and relates to the technical field of household appliances, the water heater comprises an inner container, a water inlet pipe, a water outlet pipe and a filter assembly, the inner container is provided with a water storage cavity, and a water inlet, a water outlet and a drain outlet which are communicated with the water storage cavity; the water inlet pipe is mounted at the water inlet; the water outlet pipe is mounted at the water outlet; the filter assembly comprises a first filter unit and a second filter unit, the water inlet end of the first filter unit is communicated with the drain outlet, the water outlet end of the first filter unit and the outlet end of the water outlet pipe are both communicated with the water inlet end of the second filter unit, and the water outlet end of the second filter unit is used for being connected with a water pipe. According to the technical scheme, sewage discharge operation can be simplified, and meanwhile the sewage utilization rate is increased.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a water heater. Background Technology

[0002] Water heaters are common household appliances. During use, water from the tap enters the inner tank of the water heater through the inlet pipe, is heated, and then hot water is output from the outlet pipe.

[0003] After a period of use, scale and other impurities will accumulate in the inner tank of a water heater. The circulating water drainage solution in related technologies requires the water temperature inside the product to be reduced to below 40°C before the entire tank of water is drained. Because the water contains impurities such as scale and magnesium slag, the drained wastewater cannot be reused, resulting in a waste of water resources. Utility Model Content

[0004] The main purpose of this utility model is to propose a water heater that simplifies the sewage discharge operation while improving the sewage utilization rate.

[0005] To achieve the above objectives, the water heater proposed in this utility model includes:

[0006] The inner tank is provided with a water storage cavity and a water inlet, a water outlet and a sewage outlet communicating with the water storage cavity;

[0007] The water inlet pipe is installed at the water inlet.

[0008] A water outlet pipe is installed at the water outlet; and

[0009] The filtration assembly includes a first filtration unit and a second filtration unit. The inlet of the first filtration unit is connected to the drain outlet. The outlet of the first filtration unit and the outlet of the water outlet pipe are both connected to the inlet of the second filtration unit. The outlet of the second filtration unit is used to connect to a water pipe.

[0010] In one embodiment of this application, a switching valve is further included. The switching valve is connected to the water outlet of the first filter unit, the outlet of the water outlet pipe, and the water inlet of the second filter unit, so as to connect the first filter unit and the second filter unit, or connect the water outlet pipe and the second filter unit.

[0011] In one embodiment of this application, the second filtering unit is integrated with the first filtering unit.

[0012] In one embodiment of this application, the first filtering unit includes:

[0013] First shell;

[0014] The first filter element is disposed within the first housing, dividing the inner cavity of the first housing into a first cavity and a second cavity; the second filter unit is disposed within the second cavity;

[0015] A first filter inlet pipe, connecting the drain outlet to the first cavity; and

[0016] The first filter outlet pipe connects the second cavity to the switching valve.

[0017] In one embodiment of this application, the second filtering unit includes:

[0018] The second housing is disposed within the second cavity;

[0019] The second filter element is disposed inside the second housing and divides the inner cavity of the second housing into a third cavity and a fourth cavity;

[0020] The second filter inlet pipe connects the switching valve to the third chamber; and

[0021] The second filter outlet pipe connects the fourth cavity to the water pipe.

[0022] In one embodiment of this application, the first filter element is annular, and the first cavity and the second cavity are located on the outer and inner sides of the first filter element, respectively.

[0023] And / or, the second filter element is annular, and the third cavity and the fourth cavity are respectively located on the outer and inner sides of the second filter element.

[0024] In one embodiment of this application, a housing is provided outside the inner liner, and the filter assembly is exposed outside the housing;

[0025] And / or, the first housing is transparent.

[0026] In one embodiment of this application, the switching valve is a manual three-way ball valve;

[0027] Alternatively, the switching valve may be a solenoid valve;

[0028] Alternatively, the switching valve may be an electric ceramic disc valve.

[0029] In one embodiment of this application, the water inlet pipe has several water outlet holes on its peripheral wall near the bottom of the inner tank.

[0030] In one embodiment of this application, a magnesium rod assembly is also included, which is installed in the water outlet chamber via the drain port;

[0031] And / or, the water heater further includes an electric heating element disposed within the inner tank for heating the water in the storage chamber.

[0032] In this utility model water heater, a filter assembly connected to the drain outlet is provided. The filter assembly includes a first filter unit and a second filter unit. The outlet end of the first filter unit and the outlet end of the outlet pipe are both connected to the inlet end of the second filter unit. The outlet end of the second filter unit is used to connect to the water pipe. When the water heater needs to be drained, the sewage in the storage chamber will pass through the first and second filter units for double filtration and then flow to the water pipe, which can be used directly for cleaning or bathing without waiting for the water temperature in the inner tank to drop, making operation simpler and improving water resource utilization. When the water heater is in normal use, the water discharged from the outlet pipe is filtered by the second filter unit and then discharged from the water pipe for use, improving water quality. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of an embodiment of the water heater of this utility model;

[0035] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0036] Figure 3 This is a schematic diagram of the structure of one embodiment of the water heater of this utility model in normal water use mode;

[0037] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;

[0038] Figure 5 This is a schematic diagram of the structure of one embodiment of the water heater cleaning and sewage discharge mode of this utility model;

[0039] Figure 6 for Figure 5 A magnified view of a section at point C.

[0040] Explanation of icon numbers:

[0041]

[0042]

[0043] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0045] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0046] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0047] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0048] During use, scale will accumulate inside the inner tank of a water heater. Additionally, the magnesium anode rod assembly, to protect the inner tank, will produce magnesium slag and other deposits, which will also settle at the bottom of the tank. It's generally recommended to drain the water heater's inner tank periodically. However, the draining process often involves cooling the water in the tank to below 40°C before opening the drain port to expel all the water. Users also need to collect the wastewater in a basin or bucket and then drain it down the drain, or connect a pipe to the drain. This process is cumbersome and wastes water.

[0049] Therefore, this utility model proposes a water heater that aims to connect the drain outlet 104 and the outlet of the water pipe 3 to the filter component 4 by setting a filter component 4 upstream of the water pipe of the water heater. This way, the wastewater from normal water use or cleaning of the inner tank 1 will be filtered by the filter component 4 and discharged from the same water pipe, thereby simplifying the cleaning operation and improving the water resource utilization rate.

[0050] In the embodiments of this utility model, such as Figures 1 to 6 As shown, the water heater includes an inner tank 1, an inlet pipe 2, an outlet pipe 3, and a filter assembly 4.

[0051] The inner liner 1 is provided with a water storage chamber 101 and an inlet 102, an outlet 103 and a drain 104 connected to the water storage chamber 101; the inlet pipe 2 is installed at the inlet 102; the outlet pipe 3 is installed at the outlet 103; the filter assembly 4 includes a first filter unit 41 and a second filter unit 42, the inlet end of the first filter unit 41 is connected to the drain 104, the outlet end of the first filter unit 41 and the outlet end of the outlet pipe 3 are both connected to the inlet end of the second filter unit 42, and the outlet end of the second filter unit 42 is used to connect to a water pipe.

[0052] In this embodiment, the water storage chamber 101 of the inner tank 1 is used for water storage, and an external heating device or an internal heating device can heat the water in the water storage chamber 101. A water inlet pipe 2 is installed at the water inlet 102. Optionally, one end of the water inlet pipe 2 is used to connect to a tap water pipe, and the other end extends into the water storage chamber 101 to introduce cold water into the water storage chamber 101. A water outlet pipe 3 is installed at the water outlet 103 to discharge the water in the water storage chamber 101 for user use. It is understood that since cold water is heavier than hot water, the cold water in the inner tank 1 is below the hot water, and the inlet end of the water outlet pipe 3 is usually higher than the outlet end of the water inlet pipe 2.

[0053] The inner tank 1 is also provided with a drain port 104 that is connected to the water storage chamber 101. The inlet end of the first filter unit 41 of the filter assembly 4 is connected to the drain port 104, and the outlet end of the first filter unit 41 is connected to the inlet end of the second filter unit 42. The outlet end of the second filter unit 42 is used to connect to the water pipe. When the water heater needs to be drained, the drain port 104 is opened, and the sewage in the water storage chamber 101 will flow to the water pipe after passing through the first filter unit 41 and the second filter unit 42 for double filtration. Since the sewage has undergone double filtration, it can be used for cleaning or bathing when discharged from the water pipe, which improves the water resource utilization rate. At the same time, there is no need to wait for the water temperature in the inner tank 1 to drop, making the operation more convenient.

[0054] It should be noted that the filter assembly 4 in this embodiment includes a first filter unit 41 and a second filter unit 42, so the sewage will undergo a double filtration process when discharged. Compared with the method of using only one filtration in related technologies, the sewage filtration effect of this embodiment is better and more convenient for users.

[0055] In practical applications, although most of the scale in the inner tank 1 will be deposited at the bottom of the inner tank 1, some impurities that have not yet settled may still remain in the water. Therefore, during normal water use, the impurities in the water may also be discharged through the water outlet pipe 3. Based on this, in this embodiment, the outlet end of the water outlet pipe 3 is also connected to the inlet end of the second filter unit 42. So, when using water normally, the hot water flowing out from the water outlet pipe 3 will be filtered by the second filter unit 42 before being discharged from the water pipe, which can further improve the water quality and improve the cleanliness of the water.

[0056] It should be noted that in this embodiment, the sewage pipe and the water pipe share the same water pipe. This design simplifies the structural layout, eliminating the need for a separate sewage and water pipe and saving costs. Furthermore, it simplifies user operation, requiring only the operation of one water pipe. The water pipe serves as the outlet for the water heater's drainage and is used to connect to water-using devices such as shower heads, spray systems, and faucets.

[0057] Optionally, the filtration accuracy of the second filter unit 42 is higher than that of the first filter unit 41. When discharging wastewater, the wastewater first passes through the first filter unit 41 to filter out larger impurities, and then passes through the second filter unit 42 to filter out smaller impurities, thus ensuring water quality. Correspondingly, when using water normally, the impurities in the water discharged from the outlet pipe 3 are relatively small, so the water quality can be ensured by filtering through the second filter unit 42 with higher filtration accuracy.

[0058] Optionally, the drain outlet 104 is located at the bottom of the inner tank 1, which makes it easier to discharge scale and impurities deposited at the bottom of the water storage chamber 101.

[0059] In summary, in the water heater of this utility model, by setting a filter assembly 4 connected to the drain port 104, the filter assembly 4 includes a first filter unit 41 and a second filter unit 42. The water outlet end of the first filter unit 41 and the outlet end of the water outlet pipe 3 are both connected to the water inlet end of the second filter unit 42. The water outlet end of the second filter unit 42 is used to connect to the water pipe. When the water heater needs to be drained, the sewage in the water storage chamber 101 will pass through the first filter unit 41 and the second filter unit 42 for double filtration and then flow to the water pipe, which can be used directly for cleaning or bathing without waiting for the water temperature in the inner tank 1 to drop, making the operation simpler and improving the water resource utilization rate. When the water heater is in normal use, the water discharged from the water outlet pipe 3 is filtered by the second filter unit 42 and then discharged from the water pipe for use, improving the water quality.

[0060] To further enhance the user experience, such as Figure 2 , Figure 4 as well as Figure 6 In one embodiment of this application, the water heater further includes a switching valve 5, which is connected to the outlet end of the first filter unit 41, the outlet end of the water outlet pipe 3, and the inlet end of the second filter unit 42, for connecting the first filter unit 41 and the second filter unit 42, or connecting the water outlet pipe 3 and the second filter unit 42.

[0061] In this embodiment, the switching valve 5 serves to switch between the normal water use mode and the cleaning and sewage discharge mode of the water heater, preventing backflow of water during use. Specifically, the switching valve 5 has two inlets and one outlet. The two inlets are connected to the outlet end of the first filter unit 41 and the outlet end of the outlet pipe 3, respectively, and the outlet is connected to the inlet end of the second filter unit 42. In the normal water use mode, the switching valve 5 blocks the outlet end of the first filter unit 41 and opens the outlet end of the outlet pipe 3, allowing water to flow only from the outlet pipe 3. When the water heater needs to be drained after a period of use, the switching valve 5 blocks the outlet end of the outlet pipe 3 and opens the outlet end of the first filter unit 41, allowing the wastewater after the first filtration to pass through the second filter unit 42 and be discharged for use, thus achieving sewage discharge.

[0062] Understandably, switching valve 5 is a three-way valve; optionally, switching valve 5 is a manual three-way ball valve, which the user can manually switch the water flow direction by turning the handle. Alternatively, switching valve 5 can be a solenoid valve or an electric ceramic disc valve, with the state switching controlled by the control module.

[0063] In one embodiment of this application, as Figure 2 , Figure 4 as well as Figure 6The second filter unit 42 is integrated with the first filter unit 41. This design reduces the volume occupied by the filter assembly 4 and the overall size of the water heater. Optionally, the integration of the second filter unit 42 and the first filter unit 41 can be determined according to the actual situation; for example, it can be a one-piece molded structure design, or a separate structure design that is then installed together. In one embodiment, the filter assembly 4 can be configured as a detachable structure, which can be directly disassembled from the drain port 104, the switching valve 5, and the water pipe for easy cleaning or replacement.

[0064] As an example, such as Figure 2 , Figure 4 as well as Figure 6 The first filtration unit 41 includes a first housing 411, a first filter element 412, a first filter inlet pipe 413, and a first filter outlet pipe 414. The first filter element 412 is disposed inside the first housing 411 and divides the inner cavity of the first housing 411 into a first cavity 411a and a second cavity 411b. The second filtration unit 42 is disposed inside the second cavity 411b. The first filter inlet pipe 413 connects the drain outlet 104 to the first cavity 411a. The first filter outlet pipe 414 connects the second cavity 411b to the switching valve 5.

[0065] In this embodiment, the first filter element 412 is disposed within the first housing 411, dividing the inner cavity of the first housing 411 into a first cavity 411a and a second cavity 411b. The first cavity 411a is the cavity before filtration by the first filter element 412, and the second cavity 411b is the cavity after filtration by the first filter element 412. A first filter inlet pipe 413 connects the drain outlet 104 to the first cavity 411a, allowing wastewater to flow through the first filter inlet pipe 413 into the first cavity 411a, be filtered by the first filter element 412, flow into the second cavity 411b, and then flow into the switching valve 5 through the first filter outlet pipe 414. The second filter unit 42 is disposed within the second cavity 411b, making the structure of the filter assembly 4 more compact and reducing its volume. Optionally, the second filter unit 42 and the second cavity 411b are not directly connected, but are connected through the switching valve 5, thus enabling switching between the wastewater discharge mode and the normal water use mode.

[0066] Optionally, the first filter element 412 is annular, with the first cavity 411a and the second cavity 411b located on the outer and inner sides of the first filter element 412, respectively. This design allows for a more uniform distribution of wastewater as it passes through the first filter element 412, ensuring that filtered impurities are more evenly distributed within the first cavity 411a or around the periphery of the first filter element 412, thus maintaining water flow balance and reducing water resistance. Optionally, the second filter unit 42 is located inside the first filter element 412, and the second filter unit 42 is detachably installed within the second cavity 411b.

[0067] Furthermore, such as Figure 2 , Figure 4 as well as Figure 6 The second filtration unit 42 includes a second housing 421, a second filter element 422, a second filter inlet pipe 423, and a second filter outlet pipe 424. The second housing 421 is disposed inside the second cavity 411b. The second filter element 422 is disposed inside the second housing 421 and divides the inner cavity of the second housing 421 into a third cavity 421a and a fourth cavity 421b. The second filter inlet pipe 423 connects the switching valve 5 to the third cavity 421a. The second filter outlet pipe 424 connects the fourth cavity 421b to the water pipe.

[0068] In this embodiment, the second filter element 422 is disposed inside the second housing 421, dividing the inner cavity of the second housing 421 into a third cavity 421a and a fourth cavity 421b. The third cavity 421a is the cavity before filtration by the second filter element 422, and the fourth cavity 421b is the cavity after filtration by the second filter element 422. The outlet end of the switching valve 5 is connected to the third cavity 421a through the second filter inlet pipe 423, and the second filter outlet pipe 424 is connected to the fourth cavity 421b and the water pipe, so that water in sewage discharge mode or water use mode can enter the third cavity 421a through the switching valve 5, flow into the fourth cavity 421b after filtration by the second filter element 422, and then flow to the water pipe for user use through the second filter outlet pipe 424.

[0069] Optionally, the second filter element 422 is annular, and the third cavity 421a and the fourth cavity 421b are respectively located on the outer and inner sides of the second filter element 422. This design allows water to be distributed more evenly as it passes through the second filter element 422, ensuring that filtered impurities are more evenly distributed within the third cavity 421a or around the periphery of the second filter element 422, thus maintaining water flow balance and reducing water resistance.

[0070] In one embodiment of this application, as Figure 1 , Figure 3 as well as Figure 5 The water heater also includes a housing 6 located outside the inner tank 1, and a filter assembly 4 exposed outside the housing 6.

[0071] Understandably, the casing 6 is the outer shell of the water heater, enclosing the inner tank 1. The casing 6 has corresponding installation openings for the water inlet 102, water outlet 103, and drain 104 of the inner tank 1, facilitating the installation of components such as the inlet pipe 2, outlet pipe 3, and filter assembly 4. The first filter inlet pipe 413 of the filter assembly 4 passes through the drain 104. The other parts of the filter assembly 4 can be located outside the inner tank 1 to avoid occupying the water storage space of the storage chamber 101. The filter assembly 4 can be installed inside the casing 6 to avoid damage from impacts, or it can be installed outside the casing 6 for easy observation and replacement by the user.

[0072] In this embodiment, considering ease of operation, the filter assembly 4 is exposed outside the housing 6, allowing the user to observe the amount of scale at any time. At the same time, it is convenient to perform timely cleaning of scale or replacement of the filter assembly 4 without disassembling the housing 6.

[0073] Furthermore, the first housing 411 is transparent. Optionally, the first housing 411 is a glass bottle or a transparent plastic bottle, so that the user can intuitively observe the filtration situation inside the first housing 411, thereby cleaning scale or replacing the filter assembly 4 in a timely manner. Optionally, the second housing 421 can also be made into a transparent structure.

[0074] To further improve sewage discharge efficiency, such as Figure 1 , Figure 3 as well as Figure 5 In one embodiment of this application, the water inlet pipe 2 has a plurality of water outlet holes 201 on the pipe wall near the bottom of the inner liner 1, and the plurality of water outlet holes 201 are arranged around the periphery of the water inlet pipe 2.

[0075] Understandably, scale, magnesium slag and other deposits in the inner tank 1 are mostly deposited at the bottom of the inner tank 1. By setting several water outlet holes 201 on the pipe wall of the water inlet pipe 2 near the bottom of the inner tank 1, the bottom of the inner tank 1 can be flushed during sewage discharge, so that the deposits at the bottom of the inner tank 1 can be more easily discharged from the sewage outlet 104, thereby improving sewage discharge efficiency.

[0076] In one embodiment of this application, as Figure 1 , Figure 3 as well as Figure 5 The water heater also includes a magnesium rod assembly 7, which is installed in the water outlet chamber via a drain port 104.

[0077] This design allows the drain outlet 104 and the installation port of the magnesium rod assembly 7 to share the same port, further simplifying the structural layout and making it easier for magnesium slag deposits to be discharged from the drain outlet 104.

[0078] In one embodiment of this application, as Figure 1 , Figure 3 as well as Figure 5The water heater also includes an electric heating element 8 installed in the inner tank 1 for heating the water in the water storage chamber 101.

[0079] Understandably, the electric heating component 8 includes a heating rod that extends into the water storage chamber 101. Specifically, the heating rod extends around the water inlet pipe 2 so that the cold water entering through the water inlet pipe 2 is heated in a timely manner, thereby improving heating efficiency.

[0080] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A water heater, characterized in that, include: The inner tank is provided with a water storage cavity and a water inlet, a water outlet and a sewage outlet communicating with the water storage cavity; The water inlet pipe is installed at the water inlet. The water outlet pipe is installed at the water outlet. as well as The filtration assembly includes a first filtration unit and a second filtration unit. The inlet of the first filtration unit is connected to the drain outlet. The outlet of the first filtration unit and the outlet of the water outlet pipe are both connected to the inlet of the second filtration unit. The outlet of the second filtration unit is used to connect to a water pipe.

2. The water heater as described in claim 1, characterized in that, It also includes a switching valve, which is connected to the water outlet of the first filter unit, the outlet of the water outlet pipe, and the water inlet of the second filter unit, for connecting the first filter unit and the second filter unit, or connecting the water outlet pipe and the second filter unit.

3. The water heater as described in claim 2, characterized in that, The second filter unit is integrated with the first filter unit.

4. The water heater as described in claim 3, characterized in that, The first filtering unit includes: First shell; The first filter element is disposed within the first housing, dividing the inner cavity of the first housing into a first cavity and a second cavity; the second filter unit is disposed within the second cavity; A first filter inlet pipe, connecting the drain outlet to the first cavity; and The first filter outlet pipe connects the second cavity to the switching valve.

5. The water heater as described in claim 4, characterized in that, The second filtering unit includes: The second housing is disposed within the second cavity; The second filter element is disposed inside the second housing and divides the inner cavity of the second housing into a third cavity and a fourth cavity; The second filter inlet pipe connects the switching valve to the third chamber; and The second filter outlet pipe connects the fourth cavity to the water pipe.

6. The water heater as described in claim 5, characterized in that, The first filter element is annular, and the first cavity and the second cavity are located on the outer and inner sides of the first filter element, respectively. And / or, the second filter element is annular, and the third cavity and the fourth cavity are respectively located on the outer and inner sides of the second filter element.

7. The water heater as described in any one of claims 4 to 6, characterized in that, It also includes a housing located outside the inner liner, with the filter assembly exposed outside the housing; And / or, the first housing is transparent.

8. The water heater as described in any one of claims 2 to 6, characterized in that, The switching valve is a manual three-way ball valve; Alternatively, the switching valve may be a solenoid valve; Alternatively, the switching valve may be an electric ceramic disc valve.

9. The water heater as described in any one of claims 1 to 6, characterized in that, The water inlet pipe has several water outlet holes on its peripheral wall near the bottom of the inner liner.

10. The water heater as described in any one of claims 1 to 6, characterized in that, It also includes a magnesium rod assembly, which is installed in the water storage chamber via the drain outlet; And / or, the water heater further includes an electric heating element disposed within the inner tank for heating the water in the storage chamber.

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