Electric water heating device

Abstract

The utility model relates to the technical field of water heaters, and provides a water heater which comprises a box body, a heat exchanger, a water conveying pipeline and a heat storage heating piece. The box body defines a liquid storage space, at least part of a pipe body of the water conveying pipeline is located in the liquid storage space, the water conveying pipeline comprises a water inlet pipe section and a water outlet pipe section, the water inlet pipe section is connected with the water inlet end of the heat exchanger, and the water outlet pipe section is connected with the water outlet end of the heat exchanger; the heat storage heating piece is connected with the box body, is arranged close to the water inlet pipe section and is used for heating liquid in the liquid storage space and water in the water inlet pipe section; an exhaust port is formed in the box body, and the space above the liquid level in the liquid storage space is communicated with the outside through the exhaust port. According to the electric water heating device, the box body is of a non-pressure-bearing type, so that the box body can be set to be smaller, the occupied volume of the electric water heating device is reduced, liquid in the liquid outlet space and water in the water inlet pipe section are heated through the heat storage heating piece, the water heating efficiency is improved, the requirement for large water volume can be met, and the applicability of the device is improved.

Description

Technical Field

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

[0002] An electric water heater is a common household water heating device that uses electricity to heat tap water or water of suitable quality to a set temperature for daily use.

[0003] Among them, a typical electric water heater is composed of a water tank, a heating element and a safety protection device. It mainly heats the water in the water tank so that the water can be stored for daily use. In order to ensure the pressure safety, the water tank of this type of electric water heater is usually larger and usually set to a cylindrical structure, which leads to a larger volume of the electric water heater, which is not conducive to assembly and transportation;

[0004] In other electric water heaters, water is heated by a water circulation pipeline. This method heats the water by heat storage, and the heating rate is slow, making it difficult to meet the demand for large water volumes. Utility Model Content

[0005] The utility model provides an electric water heater, which is used to solve the defects of the electric water heater in the prior art that the electric water heater is large in size and difficult to meet the demand of large water consumption.

[0006] The utility model provides an electric water heater, comprising:

[0007] A box body defines a liquid storage space;

[0008] A heat exchanger is disposed in the liquid storage space;

[0009] A water delivery pipeline, at least part of which is located in the liquid storage space, and the water delivery pipeline comprises a water inlet pipe section and a water outlet pipe section, wherein the water inlet pipe section is connected to the water inlet end of the heat exchanger, and the water outlet pipe section is connected to the water outlet end of the heat exchanger;

[0010] A heat storage heater connected to the box body, the heat storage heater is arranged close to the water inlet pipe section and is used to heat the liquid in the liquid storage space and the water in the water inlet pipe section;

[0011] Wherein, an exhaust port is provided on the box body, and the space above the liquid level in the liquid storage space is connected with the outside through the exhaust port.

[0012] According to the electric water heater provided by the utility model, at least part of the water inlet pipe section is formed with a first spiral pipe section, and the first spiral pipe section is wound around the outside of the heat storage heating element.

[0013] According to the electric water heater provided by the utility model, the electric water heater further comprises a supplementary heat heating element, the supplementary heat heating element is arranged close to the water outlet pipe section, and the supplementary heat heating element is used for auxiliary heating of water to be output.

[0014] According to the electric water heater provided by the utility model, the supplementary heat heating element is connected to the inner wall of the box body and is located in the liquid storage space.

[0015] According to the electric water heater provided by the utility model, at least part of the water outlet pipe section is formed with a second spiral pipe section, and the second spiral pipe section is wound around the outside of the supplementary heat heating element.

[0016] According to the electric water heater provided by the utility model, the water outlet pipe section is connected to an output pipeline, a thermostatic valve is arranged on the output pipeline, and the thermostatic valve connects the output pipeline and the water inlet pipeline to adjust the water temperature in the output pipeline.

[0017] According to the electric water heating device provided by the utility model, the supplementary heat heating element is arranged on the output pipeline connected to the output end of the thermostatic valve.

[0018] According to the electric water heater provided by the utility model, the box body is provided with a water supply port, and the water supply port is provided with a water supply valve.

[0019] According to the electric water heater provided by the utility model, the electric water heater further comprises a liquid level detector, and the liquid level detector is connected to the box;

[0020] The liquid level detector is electrically connected to the water supply valve, and is used to monitor the liquid level in the box and control the opening or closing of the water supply valve.

[0021] According to the electric water heater provided by the utility model, the electric water heater further comprises a temperature sensor, and the temperature sensor is connected to the box;

[0022] Wherein, the temperature sensor is electrically connected to the heat storage heating element, and the temperature sensor is used to sense the temperature in the liquid storage space and control the heat storage heating element to be turned on or off.

[0023] According to the electric water heater provided by the utility model, the exhaust port is opened at the bottom or the top of the box body.

[0024] According to the electric water heater provided by any of the above embodiments, the utility model has at least the following beneficial effects:

[0025] The utility model provides an electric water heater, which has a non-pressure-bearing box body through the arrangement of the exhaust port, so that the box body can be arranged smaller, which significantly reduces the volume occupied by the electric water heater, and realizes heating of the liquid in the liquid outlet space and the water in the water inlet pipe section through the heat storage heating element, thereby improving the heating efficiency of the water so that it can meet the large water demand and improve the applicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 This is a schematic diagram of the system structure of an electric water heater provided by an embodiment of the utility model;

[0028] Figure 2 It is a schematic diagram of the system structure of an electric water heater provided by another embodiment of the utility model;

[0029] Figure 3 This is one of the water use state flow charts of the electric water heater provided by the utility model;

[0030] Figure 4 This is a schematic diagram of the system structure of an electric water heater provided by another embodiment of the utility model;

[0031] Figure 5 This is the second water use state flow chart of the electric water heater provided by the utility model;

[0032] Figure 6 The utility model provides a heat storage state flow chart of the heat storage element in the hot water device.

[0033] Reference numerals:

[0034] 100, box body; 101, liquid storage space;

[0035] 110, exhaust port; 1101, exhaust pipe; 120, liquid inlet; 1201, input pipeline; 130, liquid outlet; 1301, output pipeline; 140, water supply port; 1401, water supply valve;

[0036] 200, heat exchanger; 300, heat storage heating element; 400, supplementary heat heating element; 500, water supply pipeline; 510, water outlet pipe section; 520, water inlet pipe section; 600, liquid level detector; 700, thermostatic valve; 800, temperature sensor. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0039] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0040] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0042] An electric water heater is a common household water heating device that uses electricity to heat tap water or water of suitable quality to a set temperature for daily use. It usually consists of a water tank and one or more heating elements. The heating element heats the water in the water tank to achieve heating of the water.

[0043] In the related art, the water tank on the electric water heater is usually designed as a circular pressure-bearing structure. The water in the water tank will expand when heated, which causes the water tank to bear part of the internal pressure. This makes the electric water heater set as a circular barrel structure (with a pressure relief port for pressure relief). Compared with structures of other shapes, the circular structure is less likely to produce stress concentration, thereby reducing possible cracks or damage caused by thermal expansion and contraction. In order to consider safety during use, additional expansion space is usually designed in the water tank to avoid damage caused by excessive pressure. This method limits the miniaturization of the electric water heater.

[0044] Furthermore, in the related art, water in a water tank is heated by heat storage heating to achieve the output of high-temperature hot water, but this method is slow in heating and often cannot meet the needs of continuous large-volume water use.

[0045] Regarding the problems in related technologies, such as Figure 1As shown, an electric water heater provided in the embodiment of the utility model includes a box 100, a heat exchanger 200, a water delivery pipeline 500, a heat storage heating element 300 and a supplementary heat heating element 400; the box 100 defines a liquid storage space 101, wherein an exhaust port 110 is provided on the box 100, and the space above the liquid surface in the liquid storage space 101 is connected to the outside through the exhaust port 110. In the process of heating the liquid in the water tank, the conventional electric water heater will cause the liquid in the water tank to expand, thereby pressurizing the water tank. For the safety performance of the equipment, an expansion space is often reserved in the water tank, which limits the design of the water tank structure. In this embodiment, the exhaust port 110 is provided to make the liquid storage space 101 communicate with the external atmosphere, so that when the liquid in the tank is heated, the expansion pressure of the liquid is discharged through the exhaust port 110, avoiding the box 100 from being under pressure, which enables the box 100 in this embodiment to be designed to be smaller in size, reducing the space occupied by the electric water heater.

[0046] The liquid storage space 101 formed in the box 100 is used to hold the liquid working medium. The box 100 has a liquid inlet 120 and a liquid outlet 130. The water pipeline 500 inputs cold water through the liquid inlet 120 and discharges high-temperature hot water through the liquid outlet 130. Specifically, the specific shape and structure of the box 100 can be in any form. For example, the shape, size, structure, etc. of the box 100 can be designed differently according to the specific installation and use scenarios. That is, the external structure of the box 100 is not limited in this application. Among them, the liquid inlet 120 on the box 100 is used for the input of water or the input of liquid working medium, and the liquid outlet 130 is used for the output of water, that is, water is input through the water inlet, and the water is heated in the liquid storage space 101 in conjunction with the heating of the heat storage heating element 300, and the heated water is discharged from the water pipeline 500 through the liquid outlet 130.

[0047] It can be understood that in this embodiment, the liquid storage space 101 inside the box 100 is connected to the outside, which means that no additional expansion space is required inside the box 100, so that there is more liquid working fluid storage space inside, which increases the effective liquid working fluid storage capacity and is conducive to miniaturized design.

[0048] The heat exchanger 200 is disposed in the liquid storage space 101. The heat exchanger 200 is used for cold water flow, and can heat the cold water during the cold water flow. The electric water heater can heat the cold water by direct heating or indirect heating. In this embodiment, the indirect heating of the cold water is achieved by the heat exchanger 200, and the water quality can be improved in this way.

[0049] The indirect heating method is that the heating element does not directly contact the water. Compared with the heating method in which the heating element directly contacts the water for heating, the indirect heating method improves the water quality.

[0050] At least part of the pipe body of the water delivery pipeline 500 is located in the liquid storage space 101. The water delivery pipeline 500 includes an inlet pipe section 520 and an outlet pipe section 510. The inlet pipe section 520 is connected to the water inlet end of the heat exchanger 200, and the outlet pipe section 510 is connected to the water outlet end of the heat exchanger 200. The heat storage heater 300 is connected to the housing 100. The heat storage heater 300 is arranged close to the inlet pipe section 520 and is used to heat the liquid in the liquid storage space 101 and the water in the inlet pipe section 520. The supplementary heat heater 400 is arranged close to the outlet pipe section 510 and is used to assist in heating the water to be output. In scenarios where a large amount of water is required to be used continuously, a higher hot water heating rate is required. Once the heating rate is too low, the high-temperature hot water output will be less, which will affect the user's use of hot water. In this embodiment, by setting the supplementary heat heating element 400, when a large amount of water is required, the supplementary heat heating element 400 is turned on to achieve secondary heating of the output water. The secondary heating method meets the continuous large amount of water usage scenario and improves the applicability of the device.

[0051] The heat storage heating element 300 and the supplementary heat heating element 400 are both used to heat the water to be used. The supplementary heat heating element 400 is arranged at the rear end of the heat storage heating element 300, that is, the water flow is first heated by the heat storage heating element 300 when it flows, and then heated by the supplementary heat heating element 400. It can be understood that the heating efficiency is improved by heating the water and the liquid in the liquid storage space 101 through the front end of the heat storage heating element 300, which can meet the demand for large water volume. Specifically, the specific number and specific structure of the heat storage heating element 300 and the supplementary heat heating element 400 are not limited.

[0052] In specific configuration, the heat storage heating element 300 and the supplementary heat heating element 400 may adopt the same heating structure. Of course, the heat storage heating element 300 and the supplementary heat heating element 400 may also adopt different heating structures to achieve heating. Figure 1 As shown, the arrow in the figure indicates the direction of water flow, and the box body 100 is arranged as a flat directional structure, which is convenient for the installation of the electric water heater, wherein the heat storage heating element 300 and the supplementary heat heating element 400 adopt different heater structures, wherein the supplementary heat heater is arranged at the output end of the water path, and timely supplementary heat can be achieved through the setting of the input end to be able to maintain the demand for large amounts of hot water.

[0053] It is understandable that when the heat storage heating element 300 heats the liquid in the liquid storage space 101, since the exhaust port 110 realizes the communication between the liquid storage space 101 and the external atmosphere, it is not necessary to reserve additional expansion space when the liquid working medium in the box 100 expands, thereby making the volume design of the box 100 no longer limited, so that the box 100 can have more effective liquid working medium in a limited space, and the space occupied by the box 100 can be reduced. In addition, since the inside of the box 100 is no longer under pressure, the structure of the box 100 is no longer limited to a cylindrical structure, which improves the flexibility of the design of the box 100 and enables it to be customized according to the installation location and usage.

[0054] In a specific implementation manner, Figure 1 , Figure 4 As shown, the exhaust port 110 is arranged at the bottom of the box body 100, and an exhaust pipe 1101 is connected to the exhaust port 110, and one end of the exhaust pipe 1101 is in communication with the space above the liquid level in the liquid storage space 101. The exhaust pipe 1101 is used to achieve the communication between the liquid storage space 101 and the external atmosphere, so that the box body 100 is in a non-pressure-bearing manner, and generally, the wall-mounted water heater is hung on the bathroom wall, and its top and side are at a relatively high position, which will hinder the convenience of operation. In this embodiment, the exhaust port 110 is arranged at the bottom to facilitate user operation and improve the user experience of the device.

[0055] The exhaust port 110 is used to achieve communication between the liquid storage space 101 and the external space, so the exhaust port 110 can be set at the bottom of the box body 100, or at the top of the box body 100. When it is set at the top of the box body 100, it can be achieved by directly opening a connecting hole, which is conducive to processing and preparation, and improves the production efficiency of the device.

[0056] It can be understood that setting the exhaust port 110 at the bottom can, on the one hand, be integrated with the liquid inlet 120, the liquid outlet 130 and the water replenishment port 140 on the same surface, which makes the device have a more compact structure. On the other hand, it makes it easier for users to operate the wall-mounted electric water heater when it is hung on the wall, thereby improving the convenience of the device.

[0057] In a specific implementation, the box 100 is constructed as a flat square structure, and the bottom space thereof is the lowest space from the ground after being installed on the wall. In this embodiment, a plurality of functional interfaces are arranged at the bottom of the box 100, which can facilitate user operation and improve the convenience of operation.

[0058] In some specific embodiments, an exhaust valve is provided at the exhaust port 110, and the exhaust port 110 is used to connect the liquid storage space 101 with the external atmosphere. The setting of the exhaust valve can achieve the balance of pressure in the liquid storage space 101 and the external atmosphere, so that the expansion pressure caused by heating cold water in the box 100 is released through the exhaust port 110, so that the box 100 is no longer under pressure, and no additional expansion space is retained in the box 100, thereby increasing the effective heating volume of the cold water and being able to achieve a reduction in the volume of the box 100.

[0059] Specifically, the exhaust valve is used to open and close the exhaust port 110. In this embodiment, the specific structure and specific connection relationship of the exhaust valve are not limited. That is, the exhaust valve can be a manual exhaust valve, an automatic exhaust valve, or a combined exhaust valve.

[0060] According to an embodiment provided by the utility model, Figure 2 As shown, at least part of the water inlet pipe section 520 is formed with a first spiral pipe section, and the first spiral pipe section is wound around the outside of the heat storage heater 300. When a large amount of hot water is needed, a higher heating rate is required. In this embodiment, a part of the pipe body at the water inlet pipe end is configured as a spiral structure. Such a structure improves the heating rate of hot water, and can cooperate with the supplementary heat heater 400 at the high-temperature hot water outlet end to achieve a higher heating rate.

[0061] It is understandable that cold water needs to flow through the water inlet pipe section 520 before entering the heat exchanger 200, and a portion of the water inlet pipe section 520 is arranged around the outside of the heat storage heating element 300, so that the cold water entering the box body 100 can be first preheated by the heat storage heating element 300, and then heat exchanged through the high-temperature liquid working medium in the liquid storage space 101. This method improves the heating rate of the used water.

[0062] In the specific configuration, the water outlet pipe section 510 is connected to the output pipe 1301, and the output pipe 1301 is provided with a thermostatic valve 700, which connects the output pipe 1301 and the water inlet pipe to adjust the water temperature in the output pipe 1301. The water inlet pipe is used for cold water to enter, and the water inlet pipe is connected to the water inlet pipe section 520. The high-temperature hot water is input to the output pipe 1301 through the water outlet pipe section 510, and the temperature can be adjusted by mixing with the cold water. The adjusted temperature is secondary heated by the supplementary heating element 400 at the output end of the thermostatic valve 700 to achieve the output of the predetermined temperature.

[0063] like Figure 1-3As shown, in this embodiment, the water usage state is: cold water flows into the water inlet pipe section 520 through the water inlet pipe, and the cold water in the water inlet pipe section 520 is directly heated by the heat storage heating element 300 to realize the preheating of the cold water, and then the cold water enters the heat exchanger 200, and realizes heat exchange with the liquid working medium in the liquid storage space 101 through the heat exchanger 200 to obtain high-temperature hot water, and the high-temperature hot water is output by the water outlet pipe section 510, and is input into the thermostatic valve 700 through the output pipe 1301 to mix with the cold water and fall into low-temperature mixed water, and the low-temperature mixed water flows into the supplementary heat heating element 400, thereby realizing the use of a large amount of water.

[0064] In a specific embodiment, the supplementary heating element 400 includes an instant heating type thyristor heater, which is arranged at the rear end of the thermostatic valve 700, that is, the water passes through the thermostatic valve 700 and then flows through the supplementary heating element 400 before being output. The water is heated twice in the thyristor heater, and constant temperature hot water is output through thyristor temperature control, so as to realize constant temperature bathing water of large water volume.

[0065] According to an embodiment of the present invention, the supplementary heating element 400 is connected to the inner wall of the housing 100 and is located in the liquid storage space 101. The supplementary heating element 400 is used to heat the output water to meet the demand for large water volume. In this embodiment, the supplementary heating element 400 is arranged in the housing 100, which improves the compactness of the electric water heater structure and facilitates installation by users.

[0066] It can be understood that the supplementary heating element 400 is disposed in the box body 100, so that no other accessories need to be transported during installation and transportation, which is convenient for transportation and installation.

[0067] In some embodiments, a portion of the water outlet pipe section 510 is formed with a second spiral pipe section, and the second spiral pipe section is wound around the outside of the supplementary heating element 400. Improving the heating rate of water can solve the problem of difficulty in using large amounts of water. In this embodiment, by embedding the supplementary heating element 400 in the liquid storage space 101 and making part of the water outlet pipe section 510 wound around the supplementary heating heater, the heating rate of water is improved, solving the problem of using large amounts of water.

[0068] It is understandable that there are many ways to increase the water heating rate, such as increasing the power of the heating element. In this embodiment, by winding part of the pipe body of the water outlet pipe section 510 around the supplementary heat heating element 400, the contact area between the water and the heating element is increased, supplementary heat is achieved, thereby increasing the water heating rate and solving the problem of large water consumption.

[0069] like Figure 4As shown, in a specific embodiment, the box body 100 is an upright wall-mounted box body 100, the heat storage heating element 300 is arranged at the bottom position of the liquid storage space 101, the heat exchanger 200 is located in the middle or upper middle position of the storage space, and the supplementary heat heating element 400 is arranged in the upper position of the liquid storage cavity. Part of the pipe body of the water inlet pipe section 520 is wound around the heat storage heating element 300, and part of the pipe body of the water outlet pipe section 510 is wound around the supplementary heat heating element 400. This allows the entire liquid storage space 101 to form a bottom heat exchange part, a middle heat exchange part and a top heat exchange part. The three-stage layered heat exchange is used to improve the heating rate of water use, thereby solving the problem of large water use.

[0070] In the specific setting, the two input ends of the thermostatic valve 700 are respectively connected to the water outlet pipe section 510 and the water inlet pipe section 520, and the water inlet pipe section 520 is connected to the water inlet pipeline, and the water outlet pipe section 510 is connected to the output pipeline 1301, so that the mixing of high-temperature hot water and cold water can be achieved in the thermostatic valve 700, and bathing water of a predetermined temperature can be output.

[0071] like Figure 4 , Figure 5 As shown, in this embodiment, the water usage state is: cold water flows into the water inlet pipe section 520 through the water inlet pipe, performs a primary heat exchange in the bottom heat exchanger 200 formed in the water inlet pipe section 520, and then enters the middle heat exchanger 200 for a secondary heat exchange, and then is output through the middle heat exchanger 200 to enter the top heat exchanger 200 for heat exchange, and performs a thermostatic mode in the top heat exchanger 200, the heat storage heater is turned off, and the supplementary heat heater is turned on to achieve efficient heat exchange in the top heat exchanger 200, thereby increasing the heating rate of the water, and the heated high-temperature hot water is output through the water outlet pipe section 510, and constant-temperature hot water is output through the thermostatic valve 700.

[0072] In a specific implementation, the heat exchanger 200 may be a coil type or a fin-tube-fin type. This embodiment does not limit the specific structural form of the heat exchanger 200.

[0073] The thermostatic valve 700 is used to adjust the output water temperature. Specifically, the thermostatic valve 700 may be a mechanical thermostatic valve 700 or an electronic thermostatic valve 700. The specific structure of the thermostatic valve 700 is not limited in this embodiment.

[0074] According to an embodiment of the utility model, a water replenishment port 140 is provided on the box body 100, and a water replenishment valve 1401 is provided at the water replenishment port 140. When the electric water heater is in use, the high-temperature water working medium in the liquid storage space 101 will evaporate under the heating of the heating element, which causes the liquid level in the liquid storage space 101 to drop after a certain period of time. In this embodiment, the water replenishment port 140 is provided, so that the water in the liquid storage cavity can be replenished through the water replenishment port 140 during the continuous heating process, thereby realizing continuous heating of the water.

[0075] It can be understood that, by setting the water replenishment port 140, the water replenishment port 140 and the liquid inlet 120 are independent of each other, the liquid inlet 120 is used for inputting cold water, and the water replenishment port 140 is used for inputting liquid working medium, wherein the liquid working medium inputted by the water replenishment port 140 and the cold water inputted by the liquid inlet 120 can be the same or different. In this embodiment, the same liquid is used for description, that is, the liquid working medium in the liquid storage space 101 is also cold water.

[0076] In the specific configuration, a water inlet pipeline is provided outside the box 100, and the water inlet pipeline can input cold water, and has two branch pipes respectively provided on the water inlet pipeline, one branch pipe is connected to the liquid inlet 120, and the other branch pipe is connected to the water replenishment port 140, wherein a valve is provided on the branch pipe connected to the water replenishment port 140 to control the connection and disconnection of the branch pipe. Through the configuration of the water replenishment port 140, water replenishment and cold water heating can be performed simultaneously, so that continuous replenishment can be performed when water is needed for a long time.

[0077] According to an embodiment of the present invention, the electric water heater also includes a liquid level detector 600, which is connected to the housing 100; wherein the liquid level detector 600 is electrically connected to the water replenishment valve 1401, and the liquid level detector 600 is used to monitor the liquid level in the housing 100 and control the opening or closing of the water replenishment valve 1401. In the direct heating and indirect heating schemes, the liquid storage space 101 in the housing 100 is filled with liquid working fluid, and the heating element will cause the liquid working fluid to evaporate or output during the heating process, thereby causing the liquid level to drop, and the drop in the liquid level will affect the heat exchange efficiency and even cause the heating element to dry burn. In this embodiment, the liquid level can be detected by setting the liquid level detector 600, so as to be able to issue a water replenishment reminder or control the water circuit to perform water replenishment operations, thereby improving the intelligence of the device.

[0078] It is understandable that after cold water is input from the liquid inlet 120, it is heat exchanged through the heat exchanger 200 to obtain high-temperature hot water. During the heating process, the liquid level in the liquid storage space 101 will decrease, thereby reducing the contact surface with the heat exchanger 200, thereby affecting the heat exchange efficiency. When the liquid level is lower than the warning level, the device issues a warning, prompting that water replenishment is required to prevent dry burning.

[0079] In a specific implementation, the liquid level detector 600 can be in the form of a probe or a float, and is disposed on the upper part of the housing 100. After the wall-mounted electric water heater is mounted on the wall, the highest position of the liquid level is the upper part of the housing 100. Placing the liquid level detector 600 on the upper part of the housing 100 can effectively and quickly realize the feedback of the liquid level change.

[0080] According to an embodiment of the present invention, the electric water heater further includes a temperature sensor 800, which is connected to the housing 100 and is used to sense the temperature in the liquid storage space 101. When the electric water heater is working, the heat exchanger 200 mainly relies on the high-temperature liquid medium in the liquid storage space 101 for heat exchange. In this embodiment, the temperature sensor 800 is set to sense the temperature of the liquid medium in the liquid storage space 101 in real time, so as to realize the control of the opening of the heat storage heating element 300, thereby improving the intelligence of the device.

[0081] It is understandable that the liquid working medium in the liquid storage space 101 is replenished through the water replenishment port 140. After replenishment, the temperature of the liquid working medium in the liquid storage space 101 decreases, which will affect the heat exchange efficiency, so it is necessary to turn on the heat storage heating element 300 in time to achieve heating. This embodiment improves the feedback rate through real-time feedback of the temperature sensor 800.

[0082] like Figure 6 As shown, the heat storage state of the heat storage heating element 300 is: the liquid level detector 600 reads the liquid level information and determines whether water replenishment is needed. When water replenishment is needed, the water replenishment valve 1401 is opened to replenish the liquid working medium in the liquid storage space 101. When the predetermined liquid level is reached, the liquid level detector 600 feeds back information and controls the water replenishment valve 1401 to close, and the heat storage heating element 300 starts heating. When the temperature sensor 800 senses that the temperature has reached the predetermined temperature, the heating is stopped, so that the liquid working medium in the liquid storage space 101 is kept in a constant temperature state.

[0083] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment makes the interior of the housing 100 non-pressurized by setting the exhaust port 110, thereby eliminating the need for additional expansion space, making the overall structure of the device more compact, effectively reducing the space occupied by the electric water heater, and increasing the effective liquid storage capacity of the liquid storage space 101, so that a water heater with a smaller volume can output more effective hot water. And because the housing 100 is non-pressurized, the force inside the housing 100 is smaller, so it can be set to a slim square structure, or other special-shaped structures, which can adapt to applications in different scenarios and improve the adaptability of the device. Furthermore, by setting the supplementary heating element 400, the heating rate of hot water is increased, solving the problem of large water consumption.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. An electric water heater, characterized in that: include: A box body defines a liquid storage space; A heat exchanger is disposed in the liquid storage space; A water delivery pipeline, at least part of which is located in the liquid storage space, and the water delivery pipeline comprises a water inlet pipe section and a water outlet pipe section, wherein the water inlet pipe section is connected to the water inlet end of the heat exchanger, and the water outlet pipe section is connected to the water outlet end of the heat exchanger; A heat storage heater connected to the box body, the heat storage heater is arranged close to the water inlet pipe section and is used to heat the liquid in the liquid storage space and the water in the water inlet pipe section; Wherein, an exhaust port is provided on the box body, and the space above the liquid level in the liquid storage space is connected with the outside through the exhaust port.

2. The electric water heater according to claim 1, characterized in that: At least part of the water inlet pipe section is formed with a first spiral pipe section, and the first spiral pipe section is wound around the outside of the heat storage heater.

3. The electric water heater according to claim 1 or 2, characterized in that: The electric water heater also includes a supplementary heat heating element, which is arranged close to the water outlet pipe section and is used for auxiliary heating of water to be output.

4. The electric water heater according to claim 3, characterized in that: The supplementary heat heater is connected to the inner wall of the box body and is located in the liquid storage space.

5. The electric water heater according to claim 4, characterized in that: At least part of the water outlet pipe section is formed with a second spiral pipe section, and the second spiral pipe section is wound around the outside of the supplementary heat heating element.

6. The electric water heater according to claim 3, characterized in that: The water outlet pipe section is connected to an output pipeline, and a thermostatic valve is arranged on the output pipeline. The thermostatic valve connects the output pipeline and the water inlet pipeline to adjust the water temperature in the output pipeline.

7. The electric water heater according to claim 6, characterized in that: The supplementary heat heater is arranged on an output pipeline connected to the output end of the thermostatic valve.

8. The electric water heater according to claim 1, characterized in that: The box body is provided with a water replenishing port, and a water replenishing valve is provided at the water replenishing port.

9. The electric water heater according to claim 8, characterized in that: The electric water heater also includes a liquid level detector, which is connected to the tank; The liquid level detector is electrically connected to the water supply valve, and is used to monitor the liquid level in the box and control the opening or closing of the water supply valve.

10. The electric water heater according to claim 1, characterized in that: The electric water heater also includes a temperature sensor, which is connected to the box; Wherein, the temperature sensor is electrically connected to the heat storage heating element, and the temperature sensor is used to sense the temperature in the liquid storage space and control the heat storage heating element to be turned on or off.

11. The electric water heater according to claim 1, characterized in that: The exhaust port is opened at the bottom or the top of the box body.

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