CN210107718U

CN210107718U - Energy-saving positive displacement water heater

Info

Publication number: CN210107718U
Application number: CN201920625348.8U
Authority: CN
Inventors: 周波; 周逸昕
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-02-21
Anticipated expiration: 2029-04-30

Abstract

The utility model belongs to the technical field of water heaters, and particularly discloses an energy-saving positive displacement water heater, which comprises a water heater body, a main water tank, a combustion device and a heat exchange flue, wherein the main water tank is positioned in the water heater body, the main water tank is provided with a water outlet, the combustion device and the heat exchange flue are positioned in the main water tank, and a smoke collecting cavity for air to enter is covered outside the combustion device; the heat exchange flue is in a snake shape, and one end of the heat exchange flue is communicated with the smoke collection cavity; the lower part of the water heater body is provided with a preheating water tank, and the preheating water tank is provided with a water inlet and a smoke outlet; a preheating pipeline is arranged in the preheating water tank; the flue gas can enter a preheating pipeline through a heat exchange flue, and the preheating pipeline is communicated with a smoke outlet; the preheating water tank is communicated with the main water tank. The positive displacement water heater can effectively utilize the high-temperature flue gas and tail gas waste heat generated in the water heater, improve the utilization rate of energy sources and avoid waste.

Description

Energy-saving positive displacement water heater

Technical Field

The utility model belongs to the technical field of the water heater, a energy-conserving positive displacement water heater is specifically disclosed.

Background

The positive displacement water heater is a device which can increase the temperature of cold water into hot water in a certain time by various physical principles. The water heater can be divided into an electric water heater, a gas water heater, a solar water heater, a magnetic water heater, an air energy water heater and the like according to different principles.

The positive displacement gas water heater (water heater for short) is a device which uses gas as energy source and heats water by the heat generated by gas combustion to make the water temperature meet the requirements of life, heating, production process and the like. The commercial gas water heater has large volume (the general water storage volume is more than 300L), the rated heat load can reach 99kW, and the commercial gas water heater is suitable for various places such as high-grade houses, apartments, restaurants, schools, hotels, factories, commercial offices, hospitals, entertainment and leisure places. The commercial gas water heater can meet the requirements of a large amount of continuous and comfortable water consumption.

The positive displacement gas water heater is generally provided with a water tank for containing water, a heat exchange flue and a combustion device are arranged in the water tank, the combustion device ignites gas, and high-temperature flue gas generated by combustion of the gas heats the water in the water tank through the heat exchange flue and is discharged from a water outlet for people to use. In practical use, the heat exchange flue for heating water in the water tank is short in flow path and small in heat exchange area, heat of flue gas cannot be fully exchanged with water in the water tank, the flue gas discharged from the water heater still has high temperature, and the heat cannot be fully utilized, so that energy waste is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an energy-conserving positive displacement water heater, this positive displacement water heater can effectively utilize the high temperature flue gas that produces in the water heater, improves the utilization ratio of the energy, avoids extravagant.

In order to achieve the above object, the basic scheme of the utility model is: an energy-saving positive displacement water heater comprises a water heater body, a main water tank, a combustion device and a heat exchange flue, wherein the main water tank is positioned in the water heater body, the main water tank is provided with a water outlet, the combustion device and the heat exchange flue are positioned in the main water tank, and a smoke collection cavity for air to enter is covered outside the combustion device; the heat exchange flue is in a snake shape, and one end of the heat exchange flue is communicated with the smoke collection cavity; the lower part of the water heater body is provided with a preheating water tank, and the preheating water tank is provided with a water inlet and a smoke outlet; a preheating pipeline is arranged in the preheating water tank; the flue gas can enter a preheating pipeline through a heat exchange flue, and the preheating pipeline is communicated with a smoke outlet; the preheating water tank is communicated with the main water tank.

The working principle of the basic scheme is as follows: in the scheme, the water inlet is externally connected with cold water. Cold water enters the preheating water tank through the water inlet, is preheated by the preheating water tank and then enters the main water tank. The main water tank arranged in the water heater body is used for storing hot water, and when the water heater is needed to be used, the hot water is discharged from the water outlet of the main water tank for commercial or domestic use and the like. The burner in the main water tank burns the gas and heats the water in the main water tank from this, the high temperature flue gas that produces among the gas combustion process heats the hot water in the main water tank in entering into the heat transfer flue through the smoke collecting cavity, the high temperature flue gas becomes low temperature flue gas after the heat transfer flue and enters into in the preheating pipe, utilize the temperature difference of low temperature flue gas temperature and the water in the preheating pipe, heat the water in the preheating pipe through the preheating pipe, can improve energy utilization like this, reduce energy consumption, and then reach energy-conserving effect.

The beneficial effect of this scheme of adoption lies in:

1. the heat exchange flue in the scheme is snakelike, and compared with a straight heat exchange flue in the prior art, the heat exchange flue increases the heat exchange area of the heat exchange flue in the main water tank, namely increases the contact area of the heat exchange flue and water in the main water tank, and improves the heat exchange effect; on the other hand, the time that the flue gas flows in the heat exchange flue is prolonged, and the heat exchange effect is further improved.

2. Through years of research, the inventor finds that when the flue gas circulates in the heat exchange flue, more of the flue gas has good heat exchange effect with the contact part of the heat exchange flue, and the flue gas in the central part of the flue gas of the heat exchange flue has higher internal temperature because the flue gas is not in contact with the heat exchange flue, so that the heat exchange effect is not ideal. In this scheme, be snakelike form with the setting of heat transfer flue, when the flue gas circulates in the heat transfer flue, every through a turning just change flow direction to the flue gas can produce the collision with the turning when the turning, makes the flue gas that is close to the heat transfer flue pipe wall and the flue gas that is located the heat transfer flue intermediate position produce and mix, and then makes the flue gas temperature in the heat transfer flue even, the effectual flue gas temperature who utilizes the heat transfer flue intermediate position, has improved the heat exchange rate.

3. After the flue gas is subjected to heat exchange in the heat exchange flue in the main water tank, although the temperature is reduced, the flue gas still has higher temperature (60-70 ℃ can be reached at high temperature), and most of the flue gas with higher temperature is directly discharged at present, so that the energy waste is caused. In the technical scheme, the preheating water tank is arranged, the flue gas enters the preheating pipeline after passing through the heat exchange flue, and the water in the preheating water tank (the temperature of the water entering the preheating water tank is room temperature, generally not more than 25 ℃, and is only a few degrees at a low temperature) is heated. When water needs to be added into the main water tank, the water in the preheating water tank can be added, the water in the preheating water tank absorbs the waste heat of the flue gas, so that the temperature of the water entering the main water tank is increased (generally to more than 35 ℃), the temperature of the flue gas discharged from the smoke outlet can be reduced to about 10 ℃, the water entering the main water tank from the preheating water tank can be heated to the temperature (generally 50-60 ℃) required by the main water tank more quickly, the heating time is greatly shortened, the heat of the flue gas is fully utilized, and therefore the energy is effectively saved.

4. Be equipped with the collection smoke chamber at the burner housing, on the one hand the collection smoke chamber is favorable to air admission burner, does benefit to the even abundant burning of gas and has increased heat transfer area, and on the other hand, through collection smoke chamber to water heating during burner burning, the high temperature flue gas that produces simultaneously can not cause scattering and disappearing of high temperature flue gas like this in can going through collection smoke chamber to the heat transfer flue, and then improved energy utilization.

Furthermore, the corner of the heat exchange flue is a right angle. Set the corner of heat transfer flue to the right angle, can strengthen the mixed collision effect of flue gas, behind the right angled corner, the flue gas is mixed more evenly after the collision, is favorable to the heat of high temperature flue gas to be fully absorbed by water.

Furthermore, the preheating pipeline is snakelike and the corner of preheating pipeline is the right angle. The flow direction of the exhausted flue gas can be changed at the corners of the preheating pipeline when the flue gas passes through the preheating pipeline, so that the heat exchange time is prolonged, the flowing distance of the flue gas is increased, the flue gas in the preheating pipeline is fully mixed, and the waste heat of the flue gas is fully utilized and absorbed.

And the high-temperature flue gas enters the preheating pipeline through the flue gas chamber. Compared with the direct communication of a preheating pipeline and a heat exchange flue, the flue gas chamber is arranged to concentrate flue gas exhausted from the heat exchange flue, so that the heat exchange area is increased, the waste heat of the flue gas is fully utilized, and the energy utilization rate is improved.

Further, still include first collection smoke chamber, second collection smoke chamber and communicating pipe, first collection smoke chamber is located preheating water tank upper end, second collection smoke chamber is located preheating water tank lower extreme, communicating pipe both ends communicate with flue gas room and first collection smoke chamber respectively, preheating pipe both ends communicate with first collection smoke chamber and second collection smoke chamber respectively, second collection smoke chamber communicates with the exhaust port. The flue gas can be collected and heat transfer area is increased on the one hand to setting up of first collection smoke chamber and second collection smoke chamber, prevents that the flue gas from being discharged too fast to extension flue gas that can great degree and the heat transfer time in the preheating water tank, on the other hand, first collection smoke chamber and second collection smoke chamber have increased the area of contact with water, and the heat transfer effect is better.

Further, the middle of the water heater body is provided with an air inlet area, the side wall of the air inlet area is provided with a plurality of air inlet holes, and the air inlet area is communicated with the smoke collecting cavity. Air enters the air inlet area through the air inlet hole and then enters the smoke collecting cavity to be combusted by the combustion device, so that the combustion effect of fuel gas can be improved.

Further, still include the fan, the fan is located the flue gas chamber. The fan can suck the flue gas into the heat exchange flue and the flue gas chamber and then send the flue gas into the preheating pipeline, so that the heat loss caused by flue gas loss is reduced, and the heat utilization rate is improved; and the fan can make more air enter into the smoke collecting cavity, which is helpful for the full combustion of fuel gas and the full release of heat.

Furthermore, the preheating pipelines are provided with a plurality of preheating pipelines, the upper ends of the preheating pipelines are respectively communicated with the first smoke collecting chamber, and the lower ends of the preheating pipelines are respectively communicated with the second smoke collecting chamber. The multiple preheating pipelines can increase the contact area of the flue gas and the water in the preheating water tank, and improve the heat exchange efficiency.

Furthermore, the heat exchange flue is provided with a plurality of heat exchange flues, and two ends of each heat exchange flue are respectively communicated with the smoke collection cavity and the smoke chamber. The heat exchange area of the flue gas and the water in the main water tank can be increased by the aid of the plurality of heat exchange flues, and heat exchange efficiency is improved.

Further, a heat insulation layer is arranged between the water heater body and the main water tank. The heat preservation effect can be played in the setting of heat preservation, reduces the heat loss of the hot water in the main water tank.

Drawings

Fig. 1 is a longitudinal sectional view of an energy-saving positive displacement water heater according to a first embodiment of the present invention;

FIG. 2 is a top view of the interior of a main tank according to one embodiment;

FIG. 3 is a schematic diagram of the second embodiment.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the water heater comprises a water heater body 1, a heat preservation layer 2, a main water tank 3, a smoke collection cavity 4, a combustion device 5, a smoke chamber 6, a fan 7, a heat exchange flue 8, a water outlet 9, a communicating pipe 10, a connecting pipe 11, an air inlet area 12, a first smoke collection chamber 13, an air inlet 14, a preheating water tank 15, a preheating pipeline 16, a water inlet 17, a second smoke collection chamber 18, a smoke outlet 19 and an air inlet 20.

The embodiment is basically as shown in the attached figure 1: an energy-saving positive displacement water heater comprises a water heater body 1, a main water tank 3, a combustion device 5 and a heat exchange flue 8. The number of the heat exchange flues 8 can be a plurality of, in this embodiment, three. The water heater body 1 is cuboid, a partition board is arranged in the middle of the water heater body 1, and the main water tank 3 is located in the water heater body 1 and above the partition board. The upper end of the main water tank 3 is provided with a water outlet 9, the combustion device 5 is positioned at the left lower end in the main water tank 3, and the combustion device 5 is covered with a smoke collecting cavity 4 for air to enter. A smoke gas chamber 6 is welded at the right lower end of the main water tank 3. As shown in fig. 2, the heat exchange flue 8 is serpentine, and the corners of the heat exchange flue 8 are right angles. The left ends of the three heat exchange flues 8 are respectively communicated with the smoke collection cavity 4, and the right ends of the heat exchange flues 8 are respectively communicated with the smoke chamber 6. An air inlet area 12 is arranged in the middle of the water heater body 1, the air inlet area 12 is positioned below the partition plate, a plurality of air inlet holes 14 are formed in the side wall of the air inlet area, an air inlet 20 is formed in the middle of the partition plate, and the air inlet area 12 is communicated with the smoke collection cavity 4 through the air inlet 20. Air enters the air inlet area 12 through the air inlet holes 14 and then enters the smoke collection chamber 4 through the air inlet 20 to be combusted by the combustion device 5.

A preheating water tank 15 is also arranged in the water heater body 1, and the preheating water tank 15 is positioned below the air inlet area 12. The embodiment also comprises a first smoke collecting chamber 13, a second smoke collecting chamber 18, a communicating pipe 10 and a plurality of preheating pipelines 16. In this embodiment, the number of the preheating pipes 16 is five. The first smoke collecting chamber 13 is positioned at the upper end of the preheating water tank 15, the second smoke collecting chamber 18 is positioned at the lower end of the preheating water tank, two ends of the communicating pipe 10 are respectively communicated with the smoke chamber 6 and the first smoke collecting chamber 13, the upper ends of five preheating pipelines 16 are respectively communicated with the first smoke collecting chamber 13, the lower ends of the preheating pipelines 16 are respectively communicated with the second smoke collecting chamber 18, and the second smoke collecting chamber 18 is communicated with the smoke exhaust port 19. The five preheating pipelines 16 can increase the contact area between the flue gas and the water in the preheating water tank 15, improve the heat exchange efficiency, and the downward arrangement of the preheating pipelines 16 is favorable for discharging the condensed water so as not to block the preheating pipelines 16. The embodiment also comprises a connecting pipe 11, and the preheating water tank 15 is communicated with the main water tank 3 through the connecting pipe 11.

Still include fan 7 in this scheme, fan 7 is located flue gas chamber 6. The fan 7 can suck the flue gas into the heat exchange flue 8 and the flue gas chamber 6 and then send the flue gas into the preheating pipeline 16, so that the heat loss caused by flue gas loss is reduced, and the heat utilization rate is improved; and fan 7 can make more air get into in the smoke collecting cavity 4, helps the abundant burning of gas, fully releases the heat. The heat preservation layers 2 are arranged between the water heater body 1 and the preheating water tank 15 and between the water heater body 1 and the main water tank 3, the heat preservation effect can be achieved due to the arrangement of the heat preservation layers 2, and heat loss of hot water in the main water tank 3 and the preheating water tank 15 is reduced.

The preheating pipeline can be a straight pipe or a snake-shaped pipeline. Also set up preheating pipe 16 to snakelike structure in this embodiment, can change flow direction in its corner when the flue gas of exhaust like this passes through preheating pipe, not only prolonged the time of heat transfer, increased the distance that the flue gas flows moreover, make the heat of flue gas obtain abundant utilization, absorption.

The specific implementation process is as follows, the water inlet 17 is externally connected with cold water, and the cold water enters the preheating water tank 15 through the water inlet 17, is preheated by the preheating water tank 15 and then enters the main water tank 3. A main water tank 3 provided in the water heater body 1 is used to store hot water. When hot water in the main water tank 3 needs to be heated, the combustion device 5 is started, the combustion device 5 starts to burn gas, outside air enters the air inlet area 12 through the air inlet holes 14 and enters the smoke collection cavity 4 through the air inlet 20 again for burning of the gas. The setting of fresh air inlet 14 and air inlet district 12 has improved the combustion utilization ratio of gas, and the setting up of collection smoke chamber 4 makes collection smoke chamber 4 communicate with heat transfer flue 8 all around and be favorable to the even abundant burning of gas and increased heat transfer area through air intake 20 and outside air intercommunication on the one hand, on the other hand, through collection smoke chamber 4 to water heating when burner 5 burns, the high temperature flue gas that produces simultaneously can be inhaled the heat transfer flue 8 in by the suction of fan 7 through collection smoke chamber 4, can not cause scattering and disappearing of high temperature flue gas like this, and then improved energy utilization ratio. After the heat exchange of the flue gas in the main water tank 3 through the heat exchange flue 8, the temperature is reduced, but the temperature is still higher. In this embodiment, a preheating water tank 15 is provided, and the flue gas enters a preheating pipeline 16 through a heat exchange flue 8 to heat the water in the preheating water tank 15. When needing to add water in main tank 3, just can add the water in preheating water tank 15 through connecting pipe 11, because the waste heat of flue gas has been absorbed to the water in preheating water tank 15, make the temperature that gets into in main tank 3 rise, the hydroenergy that gets into in main tank 3 from preheating water tank 15 can be faster by the temperature that main tank 3 needs, has shortened the time of heating greatly to the effectual energy that has saved.

The heat exchange flue 8 is snakelike, and compared with a straight heat exchange flue in the prior art, the heat exchange flue increases the heat exchange area of the heat exchange flue 8 in the main water tank 3, namely increases the contact area of the heat exchange flue 8 and water in the main water tank 3, and improves the heat exchange effect; on the other hand, the time of the flue gas flowing in the heat exchange flue 8 is prolonged, and the heat exchange effect is further improved. In addition, when the flue gas circulates in the heat exchange flue 8, the flowing direction is changed once when the flue gas passes through one corner, and the flue gas can collide with the corner when passing through the corner, so that the flue gas close to the pipe wall of the heat exchange flue 8 is mixed with the flue gas in the middle of the heat exchange flue 8, the temperature of the flue gas in the heat exchange flue 8 is uniform, the temperature of the flue gas in the middle of the heat exchange flue 8 is effectively utilized, and the heat exchange rate is improved.

Example two

As shown in fig. 3, the difference between the first embodiment and the second embodiment is that a plurality of protrusions are arranged in the heat exchange flue, one end of each protrusion, which is close to the smoke collection cavity, is arc-shaped, and a through hole is formed in the middle of each protrusion. When the flue gas passes through the convex part, the flue gas can be mixed more uniformly.

The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. The utility model provides an energy-conserving positive displacement water heater, includes water heater body, main water tank, burner and heat transfer flue, main water tank is located water heater body, main water tank is equipped with the delivery port, burner and heat transfer flue are located main water tank, its characterized in that: the outer cover of the combustion device is provided with a smoke collecting cavity for air to enter; the heat exchange flue is in a snake shape, and one end of the heat exchange flue is communicated with the smoke collection cavity; the lower part of the water heater body is provided with a preheating water tank, and the preheating water tank is provided with a water inlet and a smoke outlet; a preheating pipeline is arranged in the preheating water tank; the flue gas can enter a preheating pipeline through a heat exchange flue, and the preheating pipeline is communicated with a smoke outlet; the preheating water tank is communicated with the main water tank.

2. An energy saving positive displacement water heater as claimed in claim 1, wherein: the corner of the heat exchange flue is a right angle.

3. An energy saving positive displacement water heater as claimed in claim 1, wherein: the preheating pipeline is snakelike and the corner of preheating pipeline is the right angle.

4. An energy saving positive displacement water heater as claimed in claim 2, wherein: still include the flue gas room, the flue gas room is located the main water tank, the heat transfer flue is kept away from the one end and the flue gas room intercommunication of smoke collecting cavity, and high temperature flue gas gets into the preheating pipe through the flue gas room.

5. An energy saving positive displacement water heater according to claim 4, wherein: the preheating device is characterized by further comprising a first smoke collecting chamber, a second smoke collecting chamber and a communicating pipe, wherein the first smoke collecting chamber is located at the upper end of the preheating water tank, the second smoke collecting chamber is located at the lower end of the preheating water tank, two ends of the communicating pipe are communicated with the smoke chambers and the first smoke collecting chamber respectively, two ends of the preheating pipeline are communicated with the first smoke collecting chamber and the second smoke collecting chamber respectively, and the second smoke collecting chamber is communicated with the smoke exhaust port.

6. An energy saving positive displacement water heater according to claim 5, wherein: the water heater is characterized in that an air inlet area is arranged in the middle of the water heater body, a plurality of air inlet holes are formed in the side wall of the air inlet area, and the air inlet area is communicated with the smoke collection cavity.

7. An energy saving positive displacement water heater according to claim 6, wherein: still include the fan, the fan is located the flue gas chamber.

8. An energy saving positive displacement water heater according to claim 5, wherein: the upper ends of the preheating pipelines are respectively communicated with the first smoke collecting chamber, and the lower ends of the preheating pipelines are respectively communicated with the second smoke collecting chamber.

9. An energy saving positive displacement water heater as claimed in claim 8, wherein: the heat exchange flue is provided with a plurality of heat exchange flues, and two ends of each heat exchange flue are respectively communicated with the smoke collection cavity and the smoke chamber.

10. An energy saving positive displacement water heater as claimed in claim 1, wherein: and a heat insulation layer is arranged between the water heater body and the main water tank.