Water heater with heat recovery of heating body

Abstract

The utility model discloses a water heater with heating body heat recovery, including base, heating box body and heat exchange box body, the inside of heating box body is equipped with heating body, and the first heat exchange cavity is formed between heating body and heating box body, the outside of heating box body is covered to heating box body, and the second heat exchange cavity is formed between heat exchange box body and heating box body, and the water inlet is linked with the second heat exchange cavity for second heat exchange, in the utility model, through the cooperation of heating body and heating box body, the instant heating discharge of cold water in the first heat exchange cavity is realized, simultaneously, another part of cold water can be temporarily stored in the second heat exchange cavity, absorbs the waste heat and realizes secondary heat exchange, thereby reduces the shell temperature, and the cold water after secondary heat exchange realizes the preheating, avoids the problem of heat energy loss and the problem of energy efficiency reduction caused by the shell temperature of water heater being too high, also avoids the influence of high temperature on other performances of water heater, improves the service life, the stability and reliability of complete machine.

Description

Technical Field

[0001] This utility model relates to the field of electric water heater technology, and in particular to a water heater with heat recovery of the heating element. Background Technology

[0002] In recent years, instant electric water heaters have become increasingly popular among consumers due to their combination of the advantages of both gas water heaters and storage-type electric water heaters, such as high safety, rapid heating, ease of use, low operating costs, and small footprint. Among them, the "mini kitchen water heater," a smaller version of the instant electric water heater, is mainly used for hot water supply in kitchens.

[0003] Currently, widely used instantaneous electric water heaters typically experience high surface temperatures of their heating elements during operation, often exceeding 70°C and even reaching over 200°C under certain conditions. This results in excessively high casing temperatures, leading to heat loss, reduced energy efficiency, and adverse effects on various product performance aspects and lifespan (for example, high temperatures accelerate casing aging, causing degradation of the plastic shell and seals, and premature failure of internal components), thus reducing the overall stability and reliability of the unit. Therefore, current water heaters urgently require further improvement. Utility Model Content

[0004] The purpose of this invention is to provide a water heater with heat recovery of the heating element, in order to solve the problems mentioned above.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This application provides a water heater with heat recovery from a heating element, comprising:

[0007] Base;

[0008] A heating chamber is provided inside, with a water inlet at the first end and a water outlet pipe connected to the second end. The heating element and the heating chamber together form a first heat exchange chamber.

[0009] A heat exchange box is fitted onto the outside of the heating box. A water inlet pipe is connected to the heat exchange box. A second heat exchange cavity is formed between the heat exchange box and the heating box. The water inlet is connected to the second heat exchange cavity for a second heat exchange.

[0010] In one possible implementation, the heating element is cylindrical and has spiral grooves on its surface, and water from the second heat exchange chamber can enter the heating chamber along the spiral direction of the spiral grooves.

[0011] In one possible implementation, the heating chamber is a cylindrical shape arranged laterally.

[0012] In one possible implementation, the outer surface of the heating element abuts against the inner surface of the heating chamber; or, a gap is left between the outer surface of the heating element and the inner surface of the heating chamber.

[0013] In one possible implementation, the water inlet pipe is installed on one end face of the heat exchange box and away from the water inlet.

[0014] In one possible implementation, the heat exchange box is provided with an inner mounting tube in the middle, the inner mounting tube is arranged laterally inside the heat exchange box, and the first end of the inner mounting tube is provided with a first mounting opening and the second end is provided with a second mounting opening; the heating box is inserted into the inner cavity of the inner mounting tube.

[0015] In one possible implementation, the heating chamber is provided with at least one sealing ring on its exterior, and the heating chamber is sealed to the inner cavity of the mounting inner tube by the sealing ring.

[0016] In one possible implementation, the inlet end of the water inlet is equipped with a cold water inlet connector, and the outlet end of the water outlet pipe is equipped with a hot water outlet connector.

[0017] In one possible implementation, a control board is also included; a flow sensor is installed inside the cold water inlet connector, and the heating element and the flow sensor are both electrically connected to the control board.

[0018] When the flow sensor acquires a water flow signal, the control board controls the heating element to heat up.

[0019] In one possible implementation, a display is also included; a temperature control probe is installed inside the hot water outlet connector, and the temperature control probe, heating element, and display are all electrically connected to the control board, with the display used to show the water temperature.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0021] In this invention, the heating element and the heating chamber work together to achieve instant heating and discharge of cold water in the first heat exchange chamber. At the same time, another part of the cold water can be temporarily stored in the second heat exchange chamber to absorb residual heat and achieve secondary heat exchange, thereby reducing the shell temperature. The cold water that has undergone secondary heat exchange is preheated, avoiding the problem of heat loss and reduced energy efficiency caused by excessive shell temperature of the water heater. It also avoids the impact of high temperature on other performance aspects of the water heater, improving service life, overall stability and reliability. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a cross-sectional view of the present invention;

[0024] Figure 3 This is a cross-sectional view (three-dimensional view) of the present invention.

[0025] Marked in the image:

[0026] 1. Base;

[0027] 2. Heating chamber; 200. Heating element; 201. Water inlet; 202. Water outlet pipe; 203. Spiral groove;

[0028] 3. Heat exchange chamber; 301. Water inlet pipe; 302. Second heat exchange chamber; 303. Inner pipe installation; 304. Installation opening one; 305. Installation opening two;

[0029] 4. Sealing ring; 5. Cold water inlet connector; 6. Hot water outlet connector; 7. Display; 8. Thermal circuit breaker. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0031] In related technologies, the surface temperature of the heating element in the widely used instant electric water heater is generally high during actual operation, usually exceeding 70°C, and even reaching over 200°C under certain conditions. This results in excessively high shell temperature of the instant electric water heater, which not only leads to heat loss and reduced energy efficiency, but also adversely affects the various performance characteristics and service life of the product (for example, high temperature can accelerate the aging of the product shell, causing the performance of the plastic shell and seals to degrade, and also causing premature failure of internal components), reducing the stability and reliability of the entire machine.

[0032] To address the aforementioned problems, a water heater with heat recovery from the heating element is proposed. Figure 1 This document describes a water heater equipped with a heating element for heat recovery (hereinafter referred to as a water heater). Figure 1 This is a schematic diagram of the structure of this utility model. The water heater can be installed on a kitchen faucet. Cold water supplied by the faucet is heated by the water heater and can be used immediately as hot water. The following detailed description illustrates the usage scenario of installing the water heater on a faucet.

[0033] use Figures 2-3 The overall structure of this water heater with heat recovery function is described. Figure 2 This is a cross-sectional view of the present invention. Figure 3 This is a cross-sectional view (three-dimensional view) of the present invention.

[0034] This water heater, equipped with a heating element heat recovery system, includes a base 1, a heating chamber 2, and a heat exchange chamber 3, wherein:

[0035] The base 1 can be used to install the heating chamber 2 and the heat exchange chamber 3. When using a water heater in the kitchen, the water heater can also be easily installed and used by adhesive bonding, screw fixing or other installation methods through the base 1.

[0036] The heating chamber 2 is a cylindrical shape arranged in a horizontal direction. The heating chamber 2 is equipped with a heating element 200 inside, and the heating element 200 and the heating chamber 2 form a first heat exchange cavity.

[0037] The heating chamber 2 has a water inlet 201 at its first end. Water to be heated can pass through the water inlet 201 and be heated on the surface of the heating element 200 (entering the first heat exchange chamber), thus completing the instant heating of the water and producing hot water. The heating chamber 2 is connected to a water outlet pipe 202 at its second end. Hot water can be discharged through the water outlet pipe 202, thereby realizing the supply and use of hot water in the kitchen.

[0038] The heat exchange chamber 3 is cylindrical in shape and can be fitted onto the outside of the heating chamber 2. A water inlet pipe 301 is connected to the heat exchange chamber 3, and the other end of the water inlet pipe 301 can be connected to a cold water supply source. A second heat exchange cavity 302 is formed between the heat exchange chamber 3 and the heating chamber 2, and the water inlet 201 is connected to the second heat exchange cavity 302.

[0039] When cold water enters the second heat exchange chamber 302 through the inlet pipe 301, a portion of the cold water can be heated by the heating chamber 2 and the heating element 200 and discharged immediately, while the other portion can be temporarily stored in the second heat exchange chamber 302. That is, the cold water in the second heat exchange chamber 302 can absorb excess heat for secondary heat exchange, thereby reducing the temperature of the product's outer shell. Furthermore, the cold water in the second heat exchange chamber 302 can also be preheated after heat exchange, thus avoiding heat loss and reduced energy efficiency due to excessively high outer shell temperature. It also prevents high temperatures from affecting other performance aspects of the water heater, improving its service life, overall stability, and reliability.

[0040] In some embodiments, such as Figure 2 and Figure 3 As shown. Figure 2 This is a cross-sectional view of the present invention. Figure 3This is a cross-sectional view (three-dimensional view) of the present invention. To enable the water in the first heat exchange chamber to undergo its first heat exchange, the heating element 200 is cylindrical, and its surface has a spiral groove 203, with the spiral direction of the spiral groove 203 facing the outlet direction of the heating chamber 2. In this embodiment, when cold water in the heat exchange chamber 3 enters the spiral groove 203 through the inlet 201, water in the second heat exchange chamber 302 can enter the heating chamber 2 along the spiral direction of the spiral groove 203; that is, the cold water can be heated by the heating element 200.

[0041] In some embodiments, such as Figure 2 As shown. Figure 2 This is a cross-sectional view of the present invention. A gap is left between the outer surface of the heating element 200 and the inner surface of the heating chamber 2. Water flows through the gap in the second heat exchange chamber 302 and the spiral groove 203 for heating, and the water flows through at a relatively fast speed.

[0042] Alternatively, the outer surface of the heating element 200 may abut against the inner surface of the heating chamber 2, allowing the cold water to be heated only along the interior of the spiral groove 203. This heating method has higher heating efficiency and is beneficial for fully heating the cold water.

[0043] In some embodiments, such as Figure 2 As shown. Figure 2 This is a cross-sectional view of the present invention. In order to improve the effect of the secondary heat exchange of cold water in the heat exchange box 3, the water inlet pipe 301 can be installed on one end face of the heat exchange box 3 and at a position away from the water inlet 201. This allows the cold water to be transported over a longer distance, which is beneficial to the full heat exchange of the cold water.

[0044] In some embodiments, such as Figure 2 and Figure 3 As shown. Figure 2 This is a cross-sectional view of the present invention. Figure 3 This is a cross-sectional view (three-dimensional view) of the present invention. Regarding the specific installation structure between the heat exchange chamber 3 and the heating chamber 2, an inner mounting tube 303 is provided in the middle of the heat exchange chamber 3. The inner mounting tube 303 is horizontally positioned inside the heat exchange chamber 3, and its first end has a first mounting opening 304, while its second end has a second mounting opening 305. The first mounting opening 304 and the second mounting opening 305 connect to the second heat exchange cavity 302, meaning that the heating chamber 2 can be inserted and installed into the inner cavity of the inner mounting tube 303. In this embodiment, the insertion and connection of the inner mounting tube 303 and the heating chamber 2 facilitates the assembly and installation of the equipment.

[0045] In some embodiments, such as Figure 2 and Figure 3 As shown. Figure 2This is a cross-sectional view of the present invention. Figure 3 This is a cross-sectional view (three-dimensional view) of the present invention. To ensure a tight seal between the heating chamber 2 and the inner mounting tube 303, and to prevent leakage, at least one sealing ring 4 is provided on the exterior of the heating chamber 2. Figure 2 The image shows two sealing rings 4, spaced apart on the exterior of the heating chamber 2. The heating chamber 2 is sealed to the inner cavity of the mounting inner tube 303 via the sealing rings 4, thus achieving a sealing effect.

[0046] In some embodiments, such as Figure 2 and Figure 3 As shown. Figure 2 This is a cross-sectional view of the present invention. Figure 3 This is a cross-sectional view (three-dimensional view) of the present invention. In this water heater, a cold water inlet connector 5 is installed at the inlet end of the water inlet 201. The cold water inlet connector 5 can be connected to a faucet for supplying cold water to the water heater. A hot water outlet connector 6 is installed at the outlet end of the water outlet pipe 202. The hot water generated after the water heater heats the cold water can be discharged through the hot water outlet connector 6 for use.

[0047] In some embodiments, the water heater also includes a control board, which may be a PTC control board. The PTC control board may have a preset control circuit or control program for controlling the operation of the water heater.

[0048] A flow sensor is installed inside the cold water inlet connector 5. The heating element 200 and the flow sensor are electrically connected to the control board. In this embodiment, during the use of the water heater, cold water passes through the cold water inlet connector 5. The flow sensor acquires the water flow signal and transmits the signal to the control board, at which time the control board can control the heating element 200 to heat the water.

[0049] In some embodiments, such as Figure 1 As shown. Figure 1 This is a schematic diagram of the structure of this utility model. The water heater also includes a display 7, which can be embedded in the surface of the water heater casing. A temperature control probe is installed inside the hot water outlet connector 6. The temperature control probe, heating element 200, and display 7 are all electrically connected to the control board. In this embodiment, after cold water is heated to form hot water, it can be discharged through the hot water outlet connector 6. At the same time, the temperature control probe can detect the temperature of the hot water and then feed the temperature signal back to the control board. The control board then outputs the temperature signal to the display 7, which can then be used to display the water temperature, allowing the user to conveniently observe the water temperature.

[0050] In some embodiments, such as Figure 2 As shown. Figure 2This is a cross-sectional view of the present invention. A thermal circuit breaker 8 is installed on the outside of the heat exchange box 3. The thermal circuit breaker 8 is electrically connected to the heating element 200 and the control board to protect the heating element 200 from over-temperature.

[0051] In the description of this utility model, it should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0052] Furthermore, in the description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0053] On the other hand, it should be noted that, unless otherwise explicitly specified and limited, the terms "located at," "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. A water heater with heat recovery from a heating element, characterized in that, include: Base; A heating chamber is provided inside, with a water inlet at the first end and a water outlet pipe connected to the second end. The heating element and the heating chamber together form a first heat exchange chamber. A heat exchange box is fitted onto the outside of the heating box. A water inlet pipe is connected to the heat exchange box. A second heat exchange cavity is formed between the heat exchange box and the heating box. The water inlet is connected to the second heat exchange cavity for a second heat exchange.

2. The water heater with heat recovery of the heating element according to claim 1, characterized in that, The heating element is cylindrical and has spiral grooves on its surface. Water from the second heat exchange chamber can enter the heating chamber along the spiral direction of the spiral grooves.

3. The water heater with heat recovery of the heating element according to claim 2, characterized in that, The heating chamber is a cylindrical shape arranged horizontally.

4. The water heater with heat recovery of heating element according to claim 2, characterized in that, The outer surface of the heating element abuts against the inner surface of the heating chamber; or... A gap is left between the outer surface of the heating element and the inner surface of the heating box.

5. The water heater with heat recovery of the heating element according to claim 1, characterized in that, The water inlet pipe is installed on one end face of the heat exchange box and away from the water inlet.

6. The water heater with heat recovery of heating element according to claim 1, characterized in that, The heat exchange box is provided with an inner tube in the middle. The inner tube is horizontally arranged inside the heat exchange box. The first end of the inner tube is provided with an installation opening one, and the second end is provided with an installation opening two. The heating box is inserted into the inner cavity of the mounting inner tube.

7. The water heater with heat recovery of heating element according to claim 6, characterized in that, The heating chamber is provided with at least one sealing ring on its exterior, and the heating chamber is sealed and installed into the inner cavity of the mounting inner tube through the sealing ring.

8. The water heater with heat recovery of heating element according to any one of claims 1-7, characterized in that, The inlet of the water inlet is equipped with a cold water inlet connector, and the outlet of the water pipe is equipped with a hot water outlet connector.

9. The water heater with heat recovery of heating element according to claim 8, characterized in that, It also includes the control panel; A flow sensor is installed inside the cold water inlet connector, and the heating element and the flow sensor are both electrically connected to the control board. When the flow sensor acquires a water flow signal, the control board controls the heating element to heat up.

10. The water heater with heat recovery of the heating element according to claim 9, characterized in that, It also includes displays; A temperature control probe is installed inside the hot water outlet connector. The temperature control probe, heating element, and display are all electrically connected to the control board. The display is used to show the water temperature.

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