An electric heating system and an electric water heater

Abstract

The utility model discloses an electric heating system and electric water heater, electric heating system includes: first heating device and second heating device through waterway intercommunication, the both ends of waterway are used for inputting cold water and outputting hot water respectively, is equipped with heating element on waterway, first heating device is close to the cold water input end setting of waterway, and second heating device is close to the hot water output end setting of waterway, and first heating device and second heating device all are equipped with heat exchange medium, heat exchange flow channel and heating module in, and both ends of heat exchange flow channel all are communicated waterway, and heating module is used for heating its corresponding heat exchange medium, and heat exchange medium is used for with the water of heat exchange that flows through heat exchange flow channel. Electric water heater includes: shell, control module and above -mentioned electric heating system, and electric heating system and control module all are located in the shell, and electric heating system is connected with control module electricity. The utility model can sustainable high flow supply live water type hot water, satisfies the water demand of user, and guarantees the water safety of user.

Description

Technical Field

[0001] This utility model relates to the field of water heater technology, and in particular to an electric heating system and an electric water heater. Background Technology

[0002] An electric water heater is a water heater that uses electricity as its energy source for heating. It is one of the three major types of water heaters, along with gas water heaters and solar water heaters. Electric water heaters are usually storage-type water heaters. They heat the water in their storage tank to a preset temperature and then stop heating. Compared to gas water heaters, electric water heaters are not limited by water resistance and can provide a large flow of hot water, meeting the needs of users with large water usage.

[0003] However, storage-type water heaters have the following drawbacks: First, the water stored in a storage-type water heater is repeatedly heated, resulting in stagnant water that is prone to bacterial growth, affecting the user's water safety. Second, the amount of hot water a storage-type water heater can provide is limited by the capacity of its inner tank, allowing it to provide a large flow of hot water only for short periods. Once the hot water in the tank is mostly used up, the real-time heating function of the storage-type water heater cannot meet the user's continuous and high-flow-rate hot water needs. Utility Model Content

[0004] The purpose of this utility model is to disclose an electric heating system and an electric water heater that can sustainably supply a large flow of hot water to meet users' water needs and ensure their water safety.

[0005] To achieve the above objectives, in a first aspect, this utility model discloses an electric heating system, comprising:

[0006] A first heating device and a second heating device connected by a waterway;

[0007] The two ends of the water circuit are used for cold water input and hot water output, and heating elements are installed in the water circuit;

[0008] The first heating device is located near the cold water inlet of the water circuit, and the second heating device is located near the hot water outlet of the water circuit. Both the first and second heating devices are equipped with heat exchange medium, heat exchange channel and heating module. Both ends of the heat exchange channel are connected to the water circuit. The heating module is used to heat its corresponding heat exchange medium. The heat exchange medium is used to exchange heat with the water flowing through the heat exchange channel.

[0009] As an optional implementation, the heat exchange medium in the first heating device may be the same as or different from the heat exchange medium in the second heating device, and the heat exchange medium may be one of water and phase change material.

[0010] As an optional implementation, both the first heating device and the second heating device include a housing, and the heat exchange medium, heat exchange channel and heating module are all disposed in the housing.

[0011] As an alternative implementation, the shell can be a closed pressure-bearing structure or an open non-pressure-bearing structure.

[0012] As an optional implementation, the first heating device and / or the second heating device further include a temperature detection module for detecting the temperature of the heat exchange medium.

[0013] As an optional implementation, the water circuit includes an inlet water circuit, a connecting water circuit, and an outlet water circuit. The inlet water circuit, the heat exchange channel of the first heating device, the connecting water circuit, the heat exchange channel of the second heating device, and the outlet water circuit are connected in sequence. The end of the inlet water circuit away from the first heating device is used to input cold water, and the end of the outlet water circuit away from the second heating device is used to output hot water.

[0014] The heating element is located in the water inlet passage, and / or the connecting water passage, and / or the water outlet passage.

[0015] As an optional implementation, a thermostatic element is provided on the outlet water path, and the water path also includes a branch water path. The inlet ends of both the branch water path and the inlet water path are used to input cold water. The outlet end of the branch water path is connected to the inlet end of the thermostatic element, and a heating element is provided on the branch water path.

[0016] As an optional implementation, the heating element includes at least one of an electric heating tube, a thick film heater, an electromagnetic heater, and an electro-ion flame heater.

[0017] Secondly, this utility model discloses an electric water heater, including: a shell, a control module and the above-mentioned electric heating system, both of which are located inside the shell, and the electric heating system is electrically connected to the control module.

[0018] As an optional implementation, an insulation layer is provided inside the outer casing, and the insulation layer is located around the electric heating system.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] The electric heating system of this invention heats the flowing water sequentially through a first heating device and a second heating device, and combines the heat energy provided by the heating element to enable the electric heating system to continuously and in large flow rates output hot water. When applied to electric water heaters, it can not only meet the user's need for continuous and large flow rates of hot water, but also ensure the user's water safety. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments 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 these drawings without creative effort.

[0022] Figure 1 This is a diagram of the heating system of the electric water heater of this utility model.

[0023] Explanation of key figure labels:

[0024] 1. Water path; 11. Inlet water path; 12. Connecting water path; 13. Outlet water path; 14. Branch water path; 2. First heating device; 21. First heat exchange channel; 22. First heating module; 23. First temperature detection module; 3. Second heating device; 31. Second heat exchange channel; 32. Second heating module; 33. Second temperature detection module; 4. Heating element; 5. Thermostatic element; 6. Outer shell; 7. Control module; 8. Insulation layer. Detailed Implementation

[0025] 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.

[0026] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0027] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0028] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0029] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0030] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0031] Please see Figure 1 This application provides an electric heating system, including: a first heating device 2 and a second heating device 3 connected via a water passage 1. The two ends of the water passage 1 are used for inputting cold water and outputting hot water, respectively. A heating element 4 is provided on the water passage 1. The first heating device 2 is located near the cold water input end of the water passage 1, and the second heating device 3 is located near the hot water output end of the water passage 1. Both the first heating device 2 and the second heating device 3 are provided with a heat exchange medium, a heat exchange channel, and a heating module. Both ends of the heat exchange channel are connected to the water passage 1. The heating module is used to heat its corresponding heat exchange medium, and the heat exchange medium is used to exchange heat with the water flowing through the heat exchange channel.

[0032] Currently, when users have many water-using devices indoors or during peak water usage periods, the demand for hot water increases dramatically. This embodiment of the application includes a first heating device 2 and a second heating device 3, connected in series via a water circuit 1. After cold water enters the water circuit 1, it flows sequentially through the first heating device 2 and the second heating device 3, exchanging heat with the heat exchange medium being heated by the heating module within the heat exchange channels of the first heating device 2 and the second heating device 3. Simultaneously, the heating element 4 on the water circuit 1 can further heat the water, thereby obtaining hot water that is output from the output end of the water circuit 1 for user use.

[0033] On the one hand, the electric heating system of this application has a triple heating mechanism, namely a first heating device 2, a second heating device 3, and a heating element 4. These three heating mechanisms are connected in series. The first heating device 2 and the second heating device 3 are arranged sequentially along the water flow path. The position of the heating element 4 is not limited, allowing the water to undergo heating three times sequentially as it flows through water circuit 1. This results in a gradual and rapid increase in the temperature of the cold water, ensuring that the hot water output from water circuit 1 meets the user's needs and achieves a continuous high flow rate. On the other hand, the electric heating system of this application continuously heats the flowing water, ensuring that the hot water output from water circuit 1 is fresh water, thus guaranteeing the user's water safety.

[0034] In one or more embodiments, the heat exchange channel is a heat exchange coil. The heat exchange coil is constructed by bending metal tubing, such as copper or stainless steel tubing, into a spiral or serpentine shape. Based on the principles of heat conduction and convection, it realizes heat exchange between hot and cold fluids, and features a large heat exchange area and high-efficiency heat exchange. Using the heat exchange coil as a heat exchange channel enables efficient heat exchange between the water flowing through the first and second heating devices and the heat exchange medium within them, thereby giving the electric heating system a high water heating efficiency.

[0035] In one or more embodiments, the heat exchange medium in the first heating device 2 may be the same as or different from the heat exchange medium in the second heating device 3, and the heat exchange medium may be either water or a phase change material. Specifically, the heat exchange medium of both the first heating device 2 and the second heating device 3 may be water, or both may be phase change materials. Alternatively, one of the first heating device 2 and the second heating device 3 may have a heat exchange medium of water, while the other may have a heat exchange medium of a phase change material. For example, the heat exchange medium of the first heating device 2 may be water, and the heat exchange medium of the second heating device 3 may be a phase change material, or the heat exchange medium of the first heating device 2 may be a phase change material, and the heat exchange medium of the second heating device 3 may be water. When the heat exchange medium of the first heating device 2 and / or the second heating device 3 is water, the water refers to the water stored within the first heating device 2 and / or the second heating device 3.

[0036] In this embodiment, the first heating device 2 includes a water storage tank, a first heat exchange channel 21, and a first heating module 22. The first heating module 22 is used to heat the water storage tank. Both ends of the first heat exchange channel 21 are connected to a water passage 1, and the water storage tank is used to exchange heat with the water flowing through the first heat exchange channel 21. The second heating device 3 includes a phase change material, a second heat exchange channel 31, and a second heating module 32. The second heating module 32 is used to heat the phase change material. Both ends of the second heat exchange channel 31 are connected to a water passage 1, and the phase change material is used to exchange heat with the water flowing through the second heat exchange channel 31.

[0037] Both water storage and phase change material are heat exchange media, and both can heat water through heat exchange, preventing stagnant water from entering the hot water output from water circuit 1, thus ensuring user safety. The first heating device 2 utilizes the characteristics of a storage water heater, incorporating water storage as the heat exchange medium, resulting in lighter weight and lower cost. The second heating device 3 uses phase change material as the heat exchange medium; in the same volume, phase change material can store 2-3 times the heat of water, exhibiting higher heat exchange efficiency. Thus, the first heating device 2 and the second heating device 3 are connected in series, ensuring both relatively low overall weight and cost of the heating system while maintaining effective heat exchange to output hot water that meets requirements. Simultaneously, the heating element 4 further supplements the water heating, allowing the flowing water in water circuit 1 to quickly reach the required temperature during its flow, meeting the demand for continuous high-flow water use.

[0038] Both the first heating module 22 and the second heating module 32 can be electric heating tubes. Of course, other electric heating devices can also be used in actual applications, and there is no limitation on this.

[0039] It should be noted that, because the temperature of the stored water changes rapidly under heating or non-heating conditions, when the electric heating system is needed to provide hot water, the cold water in water path 1 needs to be preheated to a suitable temperature by the first heating module 22 before flowing into the first heat exchange channel 21. Then, the heated stored water is used to exchange heat with the water in the first heat exchange channel 21 to meet the heat exchange requirements. For the phase change material in the second heating device 3, it can be heated by the second heating module 32 during off-peak electricity hours. Then, when the electric heating system is needed to provide hot water and the water flows into the second heat exchange channel 31, the heated phase change material is used to exchange heat with the water in the second heat exchange channel 31 to reduce energy consumption.

[0040] It is worth noting that the water temperature in the first heating device 2 and the degree of heating of the phase change material in the second heating device 3 are determined according to the user's required hot water temperature and are not subject to any particular restrictions.

[0041] Based on the above structure, both the first heating device 2 and the second heating device 3 include a shell, in which the heat exchange medium, heat exchange channels, and heating module are all housed. The shell is generally made of stainless steel or other metal materials, or high-structural-strength materials such as plastic or ceramic, to accommodate and effectively support the internal components such as the heat exchange medium, heat exchange channels, and heating module.

[0042] The shell can be a closed pressure-bearing structure or an open non-pressure-bearing structure. The shells of the first heating device 2 and the second heating device 3 can have the same structure or different structures. Both the shells of the first heating device 2 and the third heating device 3 can be selected as closed pressure-bearing structures or open non-pressure-bearing structures based on the characteristics of the internal heat exchange medium. For example, in this embodiment, the first heating device 2 is a closed pressure-bearing structure or an open non-pressure-bearing structure, and the second heating device 3 is a closed pressure-bearing structure. Since the heat exchange medium in the first heating device 2 is stored water, the pressure change inside the first heating device 2 is not significant during the heating process of the first heating module 22. Therefore, the first heating device 2 can be either a closed pressure-bearing structure or not. To save costs, the first heating device 2 can be made of stainless steel or plastic, as long as it can support the stored water, the first heating module 22, and the first heat exchange channel 21. The heat exchange medium in the second heating device 3 is a phase change material (PCM). During the phase change process, the PCM absorbs or releases a large amount of heat, significantly affecting the pressure within the second heating device 3. The second heating device 3 employs a closed pressure-bearing structure to regulate and maintain stable pressure, thereby improving the energy utilization rate during the PCM phase change process and enhancing the heat exchange effect. The second heating device 3 can be made of materials such as stainless steel or iron enamel, and the PCM can be sodium acetate trihydrate, paraffin wax, stearic acid, etc.

[0043] In one or more embodiments, the first heating device 2 and / or the second heating device 3 further include a temperature detection module for detecting the temperature of the heat exchange medium. The first heating device 2 is provided with a first temperature detection module 23 for detecting the temperature at which the first heating module 22 heats the stored water, and the second heating device 3 is provided with a second temperature detection module 33 for detecting the temperature at which the second heating module 32 heats the phase change material, so that the heated stored water and phase change material can meet the heat exchange requirements of the user's desired hot water temperature.

[0044] Water passage 1 includes inlet water passage 11, connecting water passage 12 and outlet water passage 13. Inlet water passage 11, heat exchange channel of first heating device 2, connecting water passage 12, heat exchange channel of second heating device 3 and outlet water passage 13 are connected in sequence. The end of inlet water passage 11 away from first heating device 2 is used to input cold water, and the end of outlet water passage 13 away from second heating device 3 is used to output hot water. Heating element 4 is provided in inlet water passage 11 and / or connecting water passage 12 and / or outlet water passage 13.

[0045] One end of the inlet water passage 11 is used to input cold water, and the other end of the inlet water passage 11 is connected to the inlet end of the first heat exchange channel 21. The two ends of the connecting water passage 12 are respectively connected to the outlet end of the first heat exchange channel 21 and the inlet end of the second heat exchange channel 31. One end of the outlet water passage 13 is connected to the outlet end of the second heat exchange channel 31, and the other end of the outlet water passage 13 is used to output hot water. Cold water flows through the inlet water passage 11 to the first heat exchange channel 21 for the first heat exchange with the stored water, and then flows through the connecting water passage 12 to the second heat exchange channel 31 for the second heat exchange with the phase change material. Then, hot water is output through the outlet water passage 13. During the entire flow of water passage 1, the heating element 4 is used to heat the water to supplement the heat energy and improve the heating efficiency, so as to obtain a continuous large flow of fresh hot water for users. The heating element 4 can be set at any position among the inlet water passage 11, the connecting water passage 12, and the outlet water passage 13, depending on the heating requirements.

[0046] In one or more embodiments, a thermostatic element 5 is provided on the water outlet path 13, and the water path 1 also includes a branch water path 14. The inlet ends of both the branch water path 14 and the water inlet path 11 are used to input cold water. The outlet end of the branch water path 14 is connected to the inlet end of the thermostatic element 5, and a heating element 4 is provided on the branch water path 14.

[0047] The thermostatic element 5 can be a common thermostatic valve structure on the market, which is used to output hot water at a set temperature. The branch water circuit 14 can adjust the temperature of the water outlet in the outlet water circuit 13 to obtain hot water at the required temperature. The thermostatic element 5, the branch water circuit 14 and the heating element 4 of the water circuit 1 work together. The inlet water circuit 11, the connecting water circuit 12, the outlet water circuit 13 and the branch water circuit 14 can all be equipped with heating elements 4. When hot water is needed from the electric heating system, the heating elements 4 at corresponding positions on the inlet water passage 11, connecting water passage 12, and outlet water passage 13 are controlled to open according to the user's required hot water temperature. This, combined with the first heating device 2 and the second heating device 3, heats the cold water sequentially. When the water flows to the inlet of the thermostatic element 5 on the outlet water passage 13, the thermostatic element 5 detects its temperature. If the temperature meets the user's required hot water temperature, hot water is directly output. If the temperature does not meet the user's required hot water temperature, cold water can be added through the branch water passage 14, or hot water can be added through the branch water passage 14 and its heating elements 4, to adjust the water temperature in the outlet water passage 13 to meet the user's required hot water temperature before outputting hot water. Thus, the electric heating system of this embodiment can flexibly adjust the hot water temperature to meet user needs.

[0048] The heating element 4 includes at least one of an electric heating tube, a thick-film heater, an electromagnetic heater, and an electro-ion flame heater. The electric heating tube can be a commercially available cast aluminum heating tube, stainless steel heating tube, or copper heating tube. The thick-film heater is a heating device made by depositing conductive or resistive materials on a substrate, achieving uniform heating and high thermal efficiency. The electromagnetic heater is a device that converts electrical energy into heat energy. It uses electromagnetic heating, eliminating the hazards and interference of open flames during the heating process. It heats the workpiece by creating eddy currents on the surface of the workpiece using an electromagnetic field, achieving water-electricity separation. The electro-ion flame heater is a device that combines electro-ion technology with flame heating, using electro-ionization of fuel to achieve more complete combustion and improve heating efficiency. Of course, in practical applications, the heating element 4 can also adopt other structures, which are not limited here.

[0049] In addition, this application embodiment also provides an electric water heater, including: a shell 6, a control module 7 and the above-mentioned electric heating system, both of which are disposed inside the shell 6, and the electric heating system is electrically connected to the control module 7.

[0050] The first heating module 22, the first temperature detection module 23, the second heating module 32, the second temperature detection module 33, the heating element 4, and the thermostatic element 5 are all electrically connected to the control module 7. This allows the control module to adjust the on / off state and power of the heating element 4, the power of the first heating module 22 and the second heating module 32, and the state of the thermostatic element 5 according to the user-set hot water temperature. The control module also receives feedback signals from the first temperature detection module 23 and the second temperature detection module 33, thereby enabling flexible adjustment of the electric heating system to meet the user's need for continuous high-flow water use.

[0051] An insulation layer 8 is provided inside the outer casing 6, and the insulation layer 8 is located around the electric heating system. The insulation layer 8 can be made of insulation cotton or the like, which has the effect of heat preservation, can prevent heat loss from the electric heating system, and thus improve the heating efficiency of hot water.

[0052] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. An electric heating system, characterized in that, include: A first heating device and a second heating device connected by a waterway; The two ends of the water circuit are used for inputting cold water and outputting hot water, respectively, and a heating element is provided in the water circuit; The first heating device is located near the cold water inlet of the water circuit, and the second heating device is located near the hot water outlet of the water circuit. Both the first heating device and the second heating device are equipped with a heat exchange medium, a heat exchange channel and a heating module. Both ends of the heat exchange channel are connected to the water circuit. The heating module is used to heat the corresponding heat exchange medium. The heat exchange medium is used to exchange heat with the water flowing through the heat exchange channel.

2. The electric heating system according to claim 1, characterized in that: The heat exchange medium in the first heating device may be the same as or different from the heat exchange medium in the second heating device, and the heat exchange medium is one of water and phase change material.

3. The electric heating system according to claim 1, characterized in that: Both the first heating device and the second heating device include a housing, and the heat exchange medium, the heat exchange channel and the heating module are all disposed in the housing.

4. The electric heating system according to claim 3, characterized in that: The shell can be a closed pressure-bearing structure or an open non-pressure-bearing structure.

5. The electric heating system according to any one of claims 1-4, characterized in that: The first heating device and / or the second heating device further include a temperature detection module, which is used to detect the temperature of the heat exchange medium.

6. The electric heating system according to claim 1, characterized in that: The water circuit includes an inlet water circuit, a connecting water circuit, and an outlet water circuit. The inlet water circuit, the heat exchange channel of the first heating device, the connecting water circuit, the heat exchange channel of the second heating device, and the outlet water circuit are connected in sequence. The end of the inlet water circuit away from the first heating device is used to input cold water, and the end of the outlet water circuit away from the second heating device is used to output hot water. The heating element is located in the water inlet passage, and / or the connecting passage, and / or the water outlet passage.

7. The electric heating system according to claim 6, characterized in that: The outlet water path is equipped with a thermostatic element, and the water path also includes a branch water path. The inlet ends of the branch water path and the inlet water path are both used to input cold water. The outlet end of the branch water path is connected to the inlet end of the thermostatic element, and the heating element is provided on the branch water path.

8. The electric heating system according to claim 1, 6 or 7, characterized in that: The heating element includes at least one of an electric heating tube, a thick film heater, an electromagnetic heater, and an electro-ion flame heater.

9. An electric water heater, characterized in that, include: The housing, the control module, and the electric heating system according to any one of claims 1-8, wherein the electric heating system and the control module are both disposed within the housing, and the electric heating system is electrically connected to the control module.

10. The electric water heater according to claim 9, characterized in that: The outer shell is provided with a heat insulation layer, which is located around the periphery of the electric heating system.

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