A circulating water heater

Abstract

A circulating water heater, comprising a water storage assembly and a heating assembly, the water storage assembly comprises an outer shell and a water storage tank arranged in the outer shell, the heating assembly comprises a mounting cabinet fixed on the outer shell and a water pipe, a water pump and a thick film heater arranged in the mounting cabinet, the water inlet end and the water outlet end of the water pipe are communicated with the water storage tank, the water pump and the thick film heater are arranged on the water pipe, the water pump is connected with a pump connecting support arranged on the mounting cabinet, and the thick film heater is connected with a heater connecting support arranged on the mounting cabinet.The thick film heater is used for heating water, compared with the traditional electric heating wire, the thick film heater has the advantages of high heat efficiency, high reliability, corrosion resistance and strong oxidation resistance, and the water pipe is connected with the water storage tank, the water pump and the thick film heater, so that the water pipe does not need to be fixed by any auxiliary part.

Description

Technical Field

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

[0002] A water heater is a device that uses various physical principles to raise the temperature of cold water to hot water within a certain period of time.

[0003] Currently, traditional water heaters that use electric heating wires have the following drawbacks:

[0004] 1. Low thermal efficiency

[0005] During the heating process, some heat from the electric heating wire is lost to the surrounding environment through radiation, convection, and other means. For example, in the heating chamber of a water heater, the air around the electric heating wire is heated first before it can transfer heat to the water. This lag in heat transfer results in a thermal efficiency that is generally only around 70% to 80%.

[0006] 2. Limited lifespan

[0007] Electric heating wires are typically exposed to water or humid environments. Prolonged contact with water easily leads to corrosion. This corrosion is particularly accelerated in water with poor quality, containing high levels of impurities, dissolved oxygen, or acidic / alkaline substances. Furthermore, the high surface temperature during repeated heating also accelerates the oxidation process. For example, after prolonged use, an oxide layer will form on the surface of ordinary nickel-chromium heating wires, which affects their heating performance and may even cause the wire to break.

[0008] Electric heating wires are relatively thin and have relatively poor mechanical strength. During the installation, transportation, or long-term use of the water heater, they are easily damaged by external forces. Furthermore, with increasing usage time, the heating wire will fatigue due to factors such as thermal expansion and contraction, further reducing its mechanical strength. Due to the aforementioned problems of corrosion, oxidation, and reduced mechanical strength, the lifespan of electric heating wires is generally relatively short. Typically, the heating element of an electric heating wire water heater may need to be replaced every 3-5 years, depending on factors such as water quality and usage frequency.

[0009] 3. Limited safety

[0010] If the insulation of the heating element and its connections deteriorates, there is a risk of electric leakage. For example, if the heating element is submerged in water for a long time, its insulation layer may age and break, leading to current leakage. If the water level in the water heater is lower than the heating element, the heating element will dry-burn. In this situation, the temperature of the heating element will rise sharply, easily damaging the heating element itself and potentially causing fires or other safety accidents. Although many water heaters now have dry-burn protection devices, these devices can also malfunction and cannot completely eliminate the risk of dry-burning. Utility Model Content

[0011] This invention aims to overcome the shortcomings of the prior art by providing a circulating water heater to solve the aforementioned problems.

[0012] The technical solution adopted by this utility model to solve its technical problem is as follows: This circulating water heater includes a water storage component and a heating component assembled together. The water storage component includes an outer shell and a water tank disposed inside the outer shell. The heating component includes a mounting cabinet fixed on the outer shell and a water pipe, a water pump, and a thick film heater disposed inside the mounting cabinet. The inlet and outlet ends of the water pipe are both connected to the water tank. The water pump and the thick film heater are both disposed on the water pipe. The water pump is connected to a pump connection bracket disposed on the mounting cabinet, and the thick film heater is connected to a heater connection bracket disposed on the mounting cabinet.

[0013] Further improvements were made to the water pipe, which includes a water intake section, a diversion section, and a water outlet section. One end of the water intake section is connected to the water storage tank, and the other end is connected to the water pump. One end of the diversion section is connected to the water pump, and each of the two diversion ends is connected to a thick film heater. One end of the water outlet section is connected to the thick film heater, and the other end is connected to the water storage tank.

[0014] To further improve the system, a connecting pipe with a flow sensor is installed near the water pump in the water intake section.

[0015] Further improvements include the installation of inlet and outlet valves connected to the thick film heater between the diversion and outlet sections. The inlet and outlet valves have two independent water passage chambers. One water passage chamber has two outlets connected to the thick film heater on the inlet and outlet valve, while the other water passage chamber has two inlet ports connected to the thick film heater on the inlet and outlet valve.

[0016] Further improvements include an outer connecting box, a heating substrate, and two internal water pipes. The outer connecting box is connected to a connecting bracket. The heating substrate is located inside the outer connecting box and in the center position. Pipe support rods are provided on both its front and back surfaces. The internal water pipes are installed on the pipe support rods at the corresponding positions, and the inlet end of the internal water pipe is connected to the outlet end, and the outlet end is connected to the inlet end.

[0017] Further improvements include the installation of a temperature control sensor that extends into the water storage tank inside the cabinet, and a temperature control switch on the external connection box.

[0018] Further improvements include a pump connection bracket comprising a first cabinet connector and a pump connector. The first cabinet connector is connected to the installation cabinet. The pump connector has a plate and a semi-enclosed enclosure surrounding the plate. The lateral portion of the semi-enclosed enclosure is connected to the water pump.

[0019] Further improvements include a second cabinet connector and a box connector. The second cabinet connector is connected to the installation cabinet. The box connector is a sheet-like component that is bent to form a connector section, an extension section, and a heater connection section. The connector section is connected to the second cabinet connector. The extension section places the heater connection section on one side of the outer connection box, and the heater connection section is connected to the outer connection box.

[0020] The beneficial effects of this utility model are:

[0021] This invention uses a thick film heater to heat water, which has the advantages of high thermal efficiency, high reliability, strong corrosion resistance and oxidation resistance compared to traditional electric heating wires. At the same time, the water pipe is connected to the water storage tank, the water pump and the thick film heater, so that it does not need to be equipped with any auxiliary parts for auxiliary fixation. While ensuring stable installation, it also ensures the installation stability of the water pump and the thick film heater. Attached Figure Description

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

[0023] Figure 2 This is a structural schematic diagram of the present invention, which hides the outer shell and the cabinet door of the mounting cabinet;

[0024] Figure 3 This is a schematic diagram of the full cross-sectional structure of the inlet and outlet valve of this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the connector bracket and the thick film heater of this utility model. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings:

[0027] Referring to the attached diagram: This circulating water heater includes a water storage component 1 and a heating component 2 assembled together. The water storage component 1 includes an outer shell 11 and a water storage tank 12 disposed inside the outer shell 11. The heating component 2 includes a mounting cabinet 21 fixed on the outer shell 11, and a water pipe 22, a water pump 23, and a thick film heater 24 disposed inside the mounting cabinet 21. The inlet and outlet ends of the water pipe 22 are both connected to the water storage tank 12. The water pump 23 and the thick film heater 24 are both disposed on the water pipe 22. The water pump 23 is connected to a pump connection bracket 9 disposed on the mounting cabinet 21, and the thick film heater 24 is connected to a heater connection bracket 3 disposed on the mounting cabinet 21. The principle of this utility model is that the outer shell 11 and the mounting cabinet 21 are assembled into a whole, and both are used to house the water storage tank 12, the water pipe 22, the water pump 23, and the thick film heater 24, respectively. The water storage tank 12 is used to store water, and the water pipe 22 and the water pump 23 are used to realize water circulation, that is, the water in the water storage tank 12 is drawn out, heated by the thick film heater 24, and then returned to the water storage tank 12, thereby achieving the heating of the water. Compared with the traditional electric heating wire, the thick film heater 24 has the following advantages: 1. High thermal efficiency: When the thick film heater is working, its heating area is relatively large, which can make the heat distribution on the heated object more uniform and the energy conversion efficiency is high. Compared with the traditional electric heating wire heating method, the thermal efficiency can reach more than 90%, which can heat the water to the required temperature faster and reduce energy waste; 2. High reliability: The structure of the thick film heater is relatively simple, with a circuit formed by the deposition of thick film material on an insulating substrate. This simple structure makes its failure rate low under normal working conditions. Furthermore, its thick-film material possesses a certain degree of stability and durability, maintaining stable performance during prolonged electrical heating. 3. Strong corrosion resistance and oxidation resistance: The thick-film materials of the thick-film heater (such as platinum, palladium, and other precious metals and their alloys) and ceramic substrates exhibit excellent corrosion resistance and oxidation resistance. In environments with corrosive gases or liquids, such as heating applications in chemical equipment, the thick-film heater is less prone to corrosion and has a longer lifespan. Even at high temperatures, it maintains its heating performance and is not easily oxidized and damaged like some ordinary metal heating elements. Simultaneously, the water pump 23 is connected to the pump connecting bracket 9, and the thick-film heater 24 is connected to the device connecting bracket 3. Because the outer casing 11 has a cylindrical shape, and the rear cabinet plate of the mounting cabinet 21 on the outer casing 11 has an adaptive arc shape, and the inner end face of this rear cabinet plate is also arc-shaped, the water pump 23 and the thick-film heater 24 cannot be directly installed on the inner wall of the mounting cabinet 21. Therefore, corresponding connecting brackets are needed to solve this problem to meet the installation requirements of the water pump 23 and the thick-film heater 24. In this embodiment, the mounting cabinet 21 is also equipped with a display screen and a control module, which is used to control the water pump and the thick film heater.

[0028] The water pipe 22 includes a water inlet section 221, a diversion section 222, and a water outlet section 223. One end of the water inlet section 221 is connected to the water storage tank 12, and the other end is connected to the water pump 23. One end of the diversion section 222 is connected to the water pump 23, and each of the two diversion ends is connected to a thick film heater 24. One end of the water outlet section 223 is connected to the thick film heater 24, and the other end is connected to the water storage tank 12. The water inlet section 221 is used to draw water from the water storage tank 12 and pressurize it through the connection with the water pump 23. The water pump 23 then sends the water to the diversion section 222. The diversion section 222 can divert the water, so that two thick film heaters 24 can be used, which is more efficient for heating. The water outlet section 223 is used to receive the heated water drawn out by the thick film heaters 24 and send the water back to the water storage tank 12, thereby changing the water in the water storage tank 12 from cold to hot and realizing circulation.

[0029] The water inlet section 221 is equipped with a connecting pipe 4 with a flow sensor 41 near the water pump 23. The flow sensor 41 is also electrically connected to the control module. When the inlet water flow reaches the preset value, the water pump 23 will start immediately. Since the thick film heater is located above the water inlet section 221, it is necessary to use the pressurization of the water pump 23 to make the water flow upward, so as to achieve smooth water circulation.

[0030] Between the diversion section 222 and the outlet section 223, an inlet and outlet valve 5 connected to the thick film heater 24 is provided. The inlet and outlet valve 5 has two independent water passage chambers 51. One water passage chamber 51 has two outlets 511 on the inlet and outlet valve 5 that communicate with the thick film heater 24, and the other water passage chamber 51 has two inlet ports 512 on the inlet and outlet valve 5 that communicate with the thick film heater 24. This arrangement ensures that the cold water entering the thick film heater 24 and the hot water leaving the thick film heater 24 do not mix. The water passage chamber 51, which is provided with an outlet 511, has an inlet end that is connected to the outlet end of the diversion section 222. That is, it is used to introduce cold water from the diversion section 222 into the water passage chamber 51 and then into the thick film heater 24 through the outlet 511. The water passage chamber 51, which is provided with an inlet 511, has an outlet end that is connected to the inlet end of the outlet section 223. That is, it is used to introduce hot water from the thick film heater 24 into the water passage chamber 51 through the inlet 511 and then into the outlet section 223 through the outlet end.

[0031] The thick film heater 24 includes an outer connecting box 241, a heating substrate 242, and two internal water pipes 243. The outer connecting box 241 is connected to the connecting bracket 3. The heating substrate 242 is located inside the outer connecting box 241 and is centrally positioned. Pipe support rods 2421 are provided on both its front and back surfaces. The internal water pipes 243 are positioned on the corresponding pipe support rods 2421, with the inlet end of the internal water pipe 243 connected to the outlet 511 and the outlet end connected to the inlet 512. This arrangement allows a single thick film heater 24 to have two water flow sections (i.e., internal water pipes 243), which increases the water flow rate per heating cycle. Furthermore, the heating substrate 242 only... There is one, which achieves efficient heating while also saving energy. The water pipe 243 inside the device is set on the heating base plate 242 by the pipe support rod 2421. There are multiple pipe support rods 2421, whether they are located on the front or the side. This can meet the length of the water pipe 243 inside the device and also meet the shape of the winding of the water pipe 243 inside the device (extending the flow distance of the water liquid to make the heating sufficient). Moreover, both the pipe support rod 2421 and the water pipe 243 inside the device are metal parts, which can achieve good heat absorption. At the same time, the outer connecting box 241 is composed of two half boxes, and the end face of the half box has a positioning groove structure that matches the configuration of the water pipe 243 inside the device.

[0032] The installation cabinet 21 is equipped with a temperature control sensor 7 that extends into the water storage tank 12. The external connection box 241 is equipped with a temperature control switch 8. The temperature control sensor 7 is used to monitor the water temperature in the tank. When the temperature exceeds the preset value, the temperature control switch 8 can automatically cut off the heating of the thick film heater 24 to prevent the thick film heater 24 from being in a heating state.

[0033] The pump connection bracket 9 includes a first cabinet connector 91 and a pump connector 92. The first cabinet connector 91 is connected to the mounting cabinet 21. The pump connector 92 has a plate 921 and a semi-enclosure 922 surrounding the plate 921. The lateral part of the semi-enclosure 922 is connected to the water pump 23. The first cabinet connector 91 is a vertically arranged rod that provides a flat plane to connect with the pump connector 92, that is, the plane part of the plate 921 of the pump connector 92 is connected. The semi-enclosure 922 is obtained by bending, that is, forming a three-way barrier, and then welded into a whole. In this way, the lateral barrier part can have a good support effect, can bear the weight of the water pump 23, and is not easily deformed.

[0034] The pump connection bracket 3 includes a second cabinet connector 31 and a box connector 32. The second cabinet connector 31 is connected to the mounting cabinet 21. The box connector 32 is a sheet-like component, which is bent to form a connector section 321, an extension section 322, and a heater connection section 323. The connector section 321 is connected to the second cabinet connector 31. The extension section 322 positions the heater connection section 323 on one side of the outer connecting box 241. The heater connection section 323 is connected to the outer connecting box 241. The second cabinet connector 31 has a Z-shaped configuration. The upper horizontal portion is connected to the space partition component on the mounting cabinet 21. The remaining vertical portion and the lower horizontal portion are connected to the inner end face and side end face of the mounting cabinet 21, respectively, and are fixedly connected by welding. The box connector 32 is connected to the second cabinet connector 21. The cabinet connector 31 is connected to the thick film heater 24 at the same time. This is achieved through its own configuration. The connecting section 321 of the connector is connected to the plane provided by the vertical part of the second cabinet connector 31 (fixed by bolt connection). The extension section 322 allows the heater connecting section 323 to be located in a suitable position. That is, it provides sufficient space for the thick film heater 24, and also allows the thick film heater 24 to be connected to the diversion section 222 and the outlet section 223 at the same time. Moreover, the water pipe 22, through its connection with the water storage tank 12, the water pump 23, and the thick film heater 24, does not need to be equipped with any auxiliary components for auxiliary fixation. While ensuring stable installation, it also ensures the installation stability of the water pump 23 and the thick film heater 24.

[0035] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A recirculating water heater comprising a water storage assembly (1) and a heating assembly (2) assembled together, characterised in that: The water storage assembly (1) comprises an outer housing (11) and a water storage tank (12) arranged in the outer housing (11), and the heating assembly (2) comprises a mounting cabinet (21) fixed on the outer housing (11) and a water pipe (22), a water pump (23) and a thick film heater (24) arranged in the mounting cabinet (21), the water inlet end and the water outlet end of the water pipe (22) are communicated with the water storage tank (12), the water pump (23) and the thick film heater (24) are arranged on the water pipe (22), the water pump (23) is connected with a pump connecting support (9) arranged on the mounting cabinet (21), and the thick film heater (24) is connected with a heater connecting support (3) arranged on the mounting cabinet (21).

2. The cyclic water heater of claim 1, wherein: The water pipe (22) comprises a water inlet section (221), a shunt section (222) and a water outlet section (223), one end of the water inlet section (221) is communicated with the water storage tank (12), the other end is communicated with the water pump (23), one end of the shunt section (222) is communicated with the water pump (23), and two shunt ends are respectively connected with one thick film heater (24), one end of the water outlet section (223) is communicated with the thick film heater (24), and the other end is communicated with the water storage tank (12).

3. The cyclic water heater of claim 2, wherein: The water inlet section (221) is provided with a connecting pipe (4) with a flow sensor (41) at a position close to the water pump (23).

4. The cyclic water heater of claim 3, wherein: The shunt section (222) and the water outlet section (223) are provided with a water inlet and outlet valve (5) connected with the thick film heater (24), the water inlet and outlet valve (5) has two independent water passing cavities (51), one of which is provided with two water outlets (511) communicated with the thick film heater (24) on the water inlet and outlet valve (5), and the other of which is provided with two water inlets (512) communicated with the thick film heater (24) on the water inlet and outlet valve (5).

5. The cyclic water heater of claim 4, wherein: The thick film heater (24) comprises an outer connecting box (241), a heating base plate (242) and two in-heater water pipes (243), the outer connecting box (241) is connected with the connecting support (3), the heating base plate (242) is arranged in the outer connecting box (241) and located at a central position, pipe supporting rods (2421) are arranged on the front and back surfaces of the heating base plate (242), the in-heater water pipes (243) are arranged on the pipe supporting rods (2421) at corresponding positions, and the water inlet end of the in-heater water pipe (243) is communicated with the water outlet (511), and the water outlet end is communicated with the water inlet (512).

6. The cyclic water heater of claim 5, wherein: The mounting cabinet (21) is provided with a temperature control sensor (7) extending into the water storage tank (12), and a temperature control switch (8) is arranged on the outer connecting box (241).

7. The cyclic water heater of claim 1, wherein: The pump connecting support (9) comprises a first cabinet connecting piece (91) connected with the mounting cabinet (21) and a pump connecting piece (92) having a plate body (921) and a semi-enclosing barrier (922) arranged around the plate body (921), a lateral part of the semi-enclosing barrier (922) being connected with the water pump (23).

8. The cyclic water heater of claim 5, wherein: The device connecting support (3) comprises a second cabinet connecting piece (31) connected with the mounting cabinet (21) and a box connecting piece (32) which is a sheet-shaped member and is bent to form a connecting piece connecting section (321), an extending section (322) and a heater connecting section (323), the connecting piece connecting section (321) being connected with the second cabinet connecting piece (31), the extending section (322) making the heater connecting section (323) located at one side of the outer connecting box (241), and the heater connecting section (323) being connected with the outer connecting box (241).

Images