Closed hot water heating cavity structure

Abstract

The utility model discloses a closed hot water heating cavity structure which comprises a heating water tank, a partition plate is arranged in the heating water tank, a gap facilitating water circulation is reserved between the upper end of the partition plate and the top of the heating water tank, and the heating water tank is divided into a preheating chamber and a heating chamber by the partition plate. A cold water inlet is formed in the bottom of a preheating chamber of the heating water tank, a hot water outlet is formed in the bottom of a heating chamber of the heating water tank, a heating cylinder is arranged in the heating chamber, and a tail gas pipeline is connected to the heating cylinder. Compared with the prior art, an open type combustion mode is changed into a closed type combustion heating mode, heat generated by liquid fuel can be directly exchanged with water in the heating water tank, heat energy can be fully utilized, instant heating can be achieved, the size is small, it can be guaranteed that a large amount of hot water is output stably, and use of a user is facilitated; and the heating water tank is divided into the preheating chamber and the heating chamber, so that function division is realized, and heat energy utilization is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of water heaters, in particular to a closed hot water heating cavity structure. Background Art

[0002] Currently, water heaters on the market are divided into storage water heaters and instant water heaters according to the heating mode.

[0003] Existing thermal storage water heaters, such as solar water heaters, have the following advantages: they use electric heating to heat the water tank, are safe, and do not need to worry about gas leakage; they are also very easy to install and use, and can be used in factories and sheds where no natural gas pipelines are laid.

[0004] Disadvantages: Electric heating mainly uses electric heating rods for heating, but the water demand of water heaters is large, and electric heating rods cannot achieve instant heating. Therefore, electric heating has a water storage tank. It needs to be powered on before use. The water in the water storage tank must be heated to the set temperature before it can be used. A 60-liter water storage electric water heater takes about 1.5-2 hours to heat the water to about 60°C. The heating delay time is long, and a large amount of heat dissipation is required during the preheating and insulation processes. The water temperature is unstable during bathing, and the water temperature becomes colder and colder as you bathe. The amount of water in the water tank is limited, and you often run out of hot water halfway through a bath, and you often find that there is not enough hot water halfway through a bath. Moreover, due to the large size of the water tank, the overall size of the thermal storage water heater is large, and the space occupancy rate is high. The electric heating method causes the water to burn repeatedly in the water tank for a long time, which can easily cause scale in the water tank and requires regular cleaning.

[0005] Existing instant water heaters, such as gas water heaters, have the following advantages: small size, small temporary space, use of combustion row to heat the upper S-shaped tube coil, fast heating of hot water, and can be used immediately after burning.

[0006] The disadvantages are: using natural gas as fuel for heating requires laying natural gas pipelines, which is not suitable for use in factories, sheds and other places where there are no natural gas pipelines. There is a risk of gas leakage. If liquefied natural gas tanks are used, safety cannot be guaranteed. Instant water heaters are also greatly affected by fluctuations in the gas supply pipeline, which can easily cause the water temperature to fluctuate.

[0007] At present, in terms of heating and water output efficiency, since gas water heaters use natural gas combustion to heat the tube coil through the combustion row, it is much faster than solar electric water heaters. However, the combustion heating of the combustion row requires oxygen, so its combustion method can only be open combustion, and the thermal utilization rate of open combustion is low; and in order to achieve faster heating of the water pipes and make the outlet temperature reach the set temperature, the diameter of each tube coil is small. Too small a diameter restricts the hot water output, while too large a diameter of the tube coil is not conducive to rapid heating.

[0008] Therefore, it is urgent to develop a new combustion heating method.

[0009] Liquid fuel is a clean and very safe energy source, but its combustion and ignition method is special and cannot be adjusted to a low flame. It is usually used as an energy source for commercial stoves. Its main application areas are a series of commercial fierce fire stoves, Chinese cooking stoves, and large pot stoves. Our company has developed a multi-stage silent energy-saving combustion device for liquid fuel, see patent application number CN202410224133.0, which changes the original open combustion method of electronic fuel injection into a closed multi-stage combustion method, and does not require atomization through a high-pressure atomizing nozzle. It can be burned in a low-fire mode, which makes it possible to realize the application of liquid fuel in the field of water heaters. Summary of the invention

[0010] The purpose of the utility model is to provide a closed hot water heating cavity structure that solves the above-mentioned technical problems. Through the closed combustion structure, the combustion heating effect is better and the heat utilization rate is higher. At the same time, instant heating can be achieved, and the hot water output is large, which is also convenient for the installation and use of the liquid combustion device.

[0011] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a closed hot water heating cavity structure, including a heating water tank, a partition is provided in the heating water tank, a gap is left between the upper end of the partition and the top of the heating water tank to facilitate the circulation of water, the partition divides the heating water tank into a preheating chamber and a heating chamber, a cold water inlet is provided at the bottom of the preheating chamber of the heating water tank, a hot water outlet is provided at the bottom of the heating chamber of the heating water tank, a heating cylinder is provided in the heating chamber, and an exhaust gas pipe is connected to the heating cylinder.

[0012] Preferably, the heating cylinder is in the shape of a cylinder with a sealed top and an open bottom, and the lower end is fixed to the inner bottom surface of the heating water tank, and the heating cylinder is a corrugated cylinder.

[0013] Preferably, one end of the exhaust gas pipeline is connected to the lower part of the heating cylinder, and the other end passes through the upper end of the partition into the preheating chamber and passes out from the bottom of the heating water tank.

[0014] Preferably, the exhaust gas pipe is arranged along the left side wall, top and right side wall of the heating water tank.

[0015] Preferably, the hot water outlet is away from the partition.

[0016] Preferably, the outer wall of the heating water tank is wrapped with a thermal insulation layer.

[0017] Preferably, an ion silencer is provided at the outlet end of the exhaust pipe of the heating water tank.

[0018] Preferably, a liquid level gauge for detecting the water level is provided on the top of the heating water tank.

[0019] Preferably, a combustion device is provided in the heating tube, and a combustion port is provided at the bottom of the heating water tank to facilitate the combustion device to extend into the heating tube, and the combustion device is fixed on the combustion port of the heating water tank.

[0020] Preferably, the combustion device is a liquid fuel combustion device or a gas combustion device. The liquid fuel combustion device is provided with an air supply and air intake mechanism, and the gas combustion device is additionally provided with an air supply and air intake mechanism.

[0021] Compared with the prior art, the advantages of the utility model are:

[0022] (1) The utility model changes the open combustion mode into a closed combustion heating mode. The combustion device is built into a closed heating cylinder, the combustion device heats the inside of the heating cylinder, and the heating cylinder heats the water in the heating water tank. The exhaust gas generated by the combustion is discharged through the exhaust gas pipe, thereby realizing closed combustion. The closed combustion heating mode enables the heat generated by the liquid fuel to directly exchange heat with the water in the heating water tank, and can fully utilize the heat energy.

[0023] (2) The utility model provides a heat exchange place for the heating cylinder through the design of the heating water tank, so that the heat energy generated by combustion can be fully used for water heating. In addition, compared with the water storage tank of the thermal storage water heater, instant heating can be achieved. Therefore, the heating water tank does not need to have a large amount of water storage function, so the volume is much smaller. Compared with the existing gas water heater, its water flow is not restricted by the diameter of the pipe coil. The heating water tank can accommodate more water and can ensure that the combustion of fuel can be fully used for water heating. It only needs to increase the supply of fuel and the entry of cooling water to ensure stable and large-scale hot water output, which is convenient for users.

[0024] (3) In order to further improve the heat exchange effect, the utility model divides the heating water tank into a preheating chamber and a heating chamber through the design of a partition, which not only realizes its functional division, but also is more conducive to the utilization of thermal energy, and at the same time avoids the water inlet of the cold water inlet affecting the water outlet temperature of the hot water outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model with an ion silencer tube installed;

[0027] Figure 3 It is a schematic diagram of the bottom structure of the heating water tank of the utility model.

[0028] In the figure: 10. Liquid level meter; 2. Heating water tank; 21. Partition; 22. Heating chamber; 23. Preheating chamber; 24. Heating cylinder; 25. Exhaust pipe; 26. Cold water inlet; 27. Hot water outlet; 3. Combustion device; 31. Ion combustion body; 32. Combustion cylinder; 33. Combustion body installation box; 4. Ion silencer. DETAILED DESCRIPTION

[0029] The utility model will be further described below. The specific scheme is as follows: a closed hot water heating cavity structure, see Figures 1 to 3 , including a heating water tank 2, wherein a partition 21 is provided inside the heating water tank 2, and a gap is left between the upper end of the partition 21 and the top of the heating water tank 2 to facilitate the circulation of water. The partition 21 divides the heating water tank 2 into a preheating chamber 23 and a heating chamber 22. A cold water inlet 26 is provided at the bottom of the preheating chamber 23 of the heating water tank 2, and a hot water outlet 27 is provided at the bottom of the heating chamber 22 of the heating water tank 2. A heating cylinder 24 is provided inside the heating chamber 22, and an exhaust gas pipe 25 is connected to the heating cylinder 24.

[0030] The utility model changes the open combustion mode into a closed combustion heating mode, by placing the combustion device 3 in a closed heating cylinder 24, heating the heating cylinder 24 through the combustion device 3, heating the water in the heating water tank 2 through the heating cylinder 24, and exhaust gas generated by the combustion is discharged through the exhaust gas pipe 25, thereby realizing closed combustion. The closed combustion heating mode enables the heat generated by the liquid fuel to directly exchange heat with the water in the heating water tank 2, and can realize full utilization of thermal energy.

[0031] The design of the heating water tank 2 provides a heat exchange place for the heating cylinder 24, so that the heat energy generated by the combustion can be fully used for water heating. Moreover, compared with the water tank of a thermal storage water heater, since the combustion device 3 is used for heating, combined with the circulation of water in the cold water inlet 26 and the hot water outlet 27, instant heating can be achieved. Therefore, the heating water tank 2 does not need to have a large amount of water storage function, so its volume is much smaller; compared with existing gas water heaters, its water flow is not restricted by the diameter of the pipe coil, and the heating water tank 2 can accommodate more water. At the same time, it can ensure that the combustion of the fuel can be fully used for water heating. It only needs to increase the supply of fuel and the entry of cooling water to ensure stable and large-scale hot water output, which is convenient for users.

[0032] The utility model greatly improves the heat utilization rate of fuel combustion through a closed combustion heating method. In order to further improve the heat exchange effect, a partition 21 is provided in the heating water tank 2. A gap is left between the upper end of the partition 21 and the top of the heating water tank 2 to facilitate the circulation of water. The partition 21 divides the heating water tank 2 into a preheating chamber 23 and a heating chamber 22. When cold water enters the heating water tank 2 from the cold water inlet 26, it first enters the preheating chamber 23 for preheating and then flows into the heating chamber 22 from the gap above the partition 21. It is heated and heated by the heating cylinder 24. The heated hot water flows out from the hot water outlet 27 to provide constant temperature hot water for users. The design of the partition 21 divides the heating water tank 2 into the preheating chamber 23 and the heating chamber 22, which not only realizes its functional zoning, but also is more conducive to the utilization of thermal energy, while preventing the water inlet of the cold water inlet 26 from affecting the water outlet temperature of the hot water outlet 27.

[0033] The heating tube 24 is in the shape of a cylinder with a sealed top and an open bottom, and the lower end is fixed to the inner bottom surface of the heating water tank 2. The heating tube 24 adopts a corrugated tube with a wave tube structure, which can increase the heat exchange area of ​​the heating tube 24 and improve the heat exchange effect, so as to further improve the external heat dissipation effect of the heating tube 24.

[0034] One end of the exhaust pipe 25 is connected to the lower part of the heating cylinder 24. The heat energy generated by the combustion of the combustion device 3 is first ejected toward the top of the heating cylinder 24, then flows around the heating cylinder 24, and finally discharged from the lower end of the heating cylinder 24, thereby fully utilizing the heat energy. In order to realize the utilization of the waste heat of the exhaust gas, the other end of the exhaust pipe 25 passes through the upper end of the partition 21 into the preheating chamber 23 and comes out from the bottom of the heating water tank 2. The exhaust pipe 25 passes out from the bottom of the heating water tank 2 from top to bottom. At this time, cold water enters the preheating chamber 23 from bottom to top and realizes convection with the exhaust gas in the exhaust pipe 25, which can better absorb the waste heat in the exhaust pipe 25. The exhaust pipe 25 can be used to preheat the cold water that has just entered the preheating chamber 23, thereby realizing the utilization of the waste heat of the exhaust gas.

[0035] The exhaust gas pipe 25 is arranged along the left side wall, the top and the right side wall of the heating water tank 2. Through the arrangement of the exhaust gas pipe 25, the heating cylinder 24 can be surrounded in the middle to form a heating core, which can better avoid heat loss and achieve better heating of the water body. At the same time, the exhaust gas pipe 25 surrounding it can also heat the water body in the heating water tank 2 to avoid heating dead corners. At the same time, the waste heat in the exhaust gas pipe 25 is also fully utilized.

[0036] The hot water outlet 27 is far away from the partition 21, so as to reduce the influence of the preheating chamber 23 on the temperature of the hot water outlet 27. In order to reduce the heat loss on the surface of the heating water tank 2, the outer wall of the heating water tank 2 is wrapped with an insulation layer, and the interior is insulated by the insulation layer to reduce the heat loss. A liquid level gauge 10 for detecting the water level is provided on the top of the heating water tank 2. When the water is added to a certain height, the water intake is stopped, so as to ensure that there is space for gas expansion between the highest water level line and the top surface of the heating water tank 2.

[0037] As a household water heater, silence is particularly important. The outlet end of the exhaust pipe 25 of the heating water tank 2 is provided with an ion silencer 4. The added ion silencer 4 is used to silence and reduce the noise of the exhaust gas discharged from the heating water tank 2, so as to improve the user experience of the product, especially when the combustion device 3 adopts a liquid fuel combustion device, because the combustion of liquid fuel requires air blowing to assist combustion, the air intake and air outlet are large, and the liquid fuel is pressurized and sprayed out, resulting in the noise at the outlet end of the exhaust pipe 25 is much larger than that of the gas combustion device.

[0038] The heating tube 24 is provided with a combustion device 3, which can burn fuel to heat the heating tube 24. The bottom of the heating water tank 2 is provided with a combustion port for the combustion device 3 to extend into the heating tube 24. The combustion device 3 is fixed on the combustion port of the heating water tank 2. When installing the combustion device 3, it is only necessary to align the combustion port at the upper end of the combustion device 3 with the combustion port at the bottom of the heating water tank 2, and then fix the combustion device 3 on the combustion port of the heating water tank 2.

[0039] The heating cylinder 24 can accommodate various types of combustion devices 3. The combustion device 3 of the utility model adopts a liquid fuel combustion device or a gas combustion device:

[0040] The utility model is applied to a liquid fuel combustion device. Since the combustion of liquid fuel requires oxygen, the existing liquid fuel combustion device is equipped with an air supply and air intake mechanism. The only problem is that most of the existing liquid fuel combustion devices atomize the liquid fuel through a nozzle. When switching to a low-fire and low-oil mode, the liquid fuel is difficult to atomize, which is not conducive to the design of multiple heating gears. Therefore, a multi-stage silent and energy-saving combustion device 3 for liquid fuel developed by our company can be adopted, see CN202410224133.0, wherein the liquid fuel combustion device is composed of a combustion tube 32, an ion combustion body 31 and a combustion body installation box 33 from top to bottom. The combustion device 3 uses the structural design of the ion combustion body 31 so that the entering liquid fuel does not need to be atomized by a high-pressure atomizing nozzle. The cyclone generated by the cyclone air intake cylinder can realize the dispersed cracking and vaporization of the liquid fuel, thereby meeting the ignition conditions. After ignition, the liquid fuel continues to burn in the ion combustion body 31 to generate a large amount of high temperature, and the cyclone-type synchronous air intake of the cyclone air intake cylinder is used to realize the subsequent full vaporization and combustion of the liquid fuel. The heat of continuous combustion in the ion combustion body 31 realizes that the liquid combustion vaporization no longer relies on nozzle atomization, but continuously vaporizes the liquid fuel through high temperature. Especially at low fire, the vaporized liquid fuel can form a stable blue flame combustion surface on the ion ignition teeth, and the combustion is concentrated through the lower ring of the combustion tube 32 to enter the combustion tube 32 for complete combustion, and the generated heat is discharged from the top of the combustion tube 32 for water heating. Through this patented technology, when liquid fuel is used as fuel, the combustion control of large, medium and small gears can be carried out by controlling the oil intake and ventilation volume, thereby realizing the application of liquid fuel in the field of water heaters.

[0041] The utility model can also be applied to a gas combustion device, and an air supply and air intake mechanism is added to the gas combustion device. Since the natural gas combustion device does not have an oxygen supply combustion mechanism, an air intake pipe can be added as the air supply and air intake mechanism. It only needs to introduce oxygen to assist combustion, and the closed combustion of the natural gas combustion device in the heating cylinder 24 can be achieved. In addition, the hot water heating cavity structure of the utility model can be used in the field of water heaters and can also be applied to other heating equipment based on its structural principle.

[0042] The above is a detailed introduction to a closed hot water heating cavity structure provided by the utility model. Specific examples are used in this article to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model; at the same time, for general technicians in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. Changes and improvements to the utility model will be possible without exceeding the concept and scope specified in the attached claims. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A closed hot water heating cavity structure, characterized in that: It includes a heating water tank, which is provided with a partition. A gap is left between the upper end of the partition and the top of the heating water tank to facilitate the circulation of water. The partition divides the heating water tank into a preheating chamber and a heating chamber. A cold water inlet is provided at the bottom of the preheating chamber of the heating water tank, a hot water outlet is provided at the bottom of the heating chamber of the heating water tank, and a heating cylinder is provided in the heating chamber. An exhaust gas pipe is connected to the heating cylinder.

2. A closed hot water heating cavity structure according to claim 1, characterized in that: The heating cylinder is in the shape of a cylinder with a sealed top and an open bottom, and the lower end is fixed to the inner bottom surface of the heating water tank. The heating cylinder is a corrugated cylinder.

3. A closed hot water heating cavity structure according to claim 1, characterized in that: One end of the tail gas pipeline is connected to the lower part of the heating cylinder, and the other end passes through the upper end of the partition into the preheating chamber and passes out from the bottom of the heating water tank.

4. A closed hot water heating cavity structure according to claim 1, characterized in that: The tail gas pipeline is arranged along the left side wall, the top and the right side wall of the heating water tank.

5. The closed hot water heating cavity structure according to claim 1, characterized in that: The hot water outlet is away from the partition.

6. A closed hot water heating cavity structure according to claim 1, characterized in that: The outer wall of the heating water tank is wrapped with a heat-insulating layer.

7. The closed hot water heating cavity structure according to claim 1, characterized in that: An ion muffler is provided at the gas outlet end of the tail gas pipeline of the heating water tank.

8. The closed hot water heating cavity structure according to claim 1, characterized in that: A liquid level meter for detecting the water level is arranged on the top of the heating water tank.

9. The closed hot water heating cavity structure according to claim 1, characterized in that: A combustion device is arranged in the heating tube. A combustion port is provided at the bottom of the heating water tank to facilitate the combustion device to extend into the heating tube, and the combustion device is fixed on the combustion port of the heating water tank.

10. A closed hot water heating cavity structure according to claim 9, characterized in that: The combustion device adopts a liquid fuel combustion device or a gas combustion device. The liquid fuel combustion device is provided with an air supply and air intake mechanism, and the gas combustion device is additionally provided with an air supply and air intake mechanism.

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