CN215724135U - Gas furnace for recovering flue gas waste heat by utilizing phase change heat storage - Google Patents
Gas furnace for recovering flue gas waste heat by utilizing phase change heat storage Download PDFInfo
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- CN215724135U CN215724135U CN202121264296.XU CN202121264296U CN215724135U CN 215724135 U CN215724135 U CN 215724135U CN 202121264296 U CN202121264296 U CN 202121264296U CN 215724135 U CN215724135 U CN 215724135U
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- flue gas
- phase change
- heat exchanger
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 239000003546 flue gas Substances 0.000 title claims abstract description 60
- 239000007789 gas Substances 0.000 title claims abstract description 60
- 238000005338 heat storage Methods 0.000 title claims abstract description 48
- 230000008859 change Effects 0.000 title claims abstract description 46
- 239000002918 waste heat Substances 0.000 title claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 141
- 239000008236 heating water Substances 0.000 claims abstract description 38
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 239000012782 phase change material Substances 0.000 claims abstract description 17
- 238000009825 accumulation Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 4
- 239000012774 insulation material Substances 0.000 claims description 2
- 239000000779 smoke Substances 0.000 abstract description 18
- 238000002485 combustion reaction Methods 0.000 abstract description 14
- 238000004134 energy conservation Methods 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 4
- 239000011257 shell material Substances 0.000 abstract 6
- 238000009833 condensation Methods 0.000 description 7
- 230000005494 condensation Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000003287 bathing Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000012188 paraffin wax Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- BDKLKNJTMLIAFE-UHFFFAOYSA-N 2-(3-fluorophenyl)-1,3-oxazole-4-carbaldehyde Chemical compound FC1=CC=CC(C=2OC=C(C=O)N=2)=C1 BDKLKNJTMLIAFE-UHFFFAOYSA-N 0.000 description 2
- 229920006328 Styrofoam Polymers 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 235000017281 sodium acetate Nutrition 0.000 description 2
- 229940087562 sodium acetate trihydrate Drugs 0.000 description 2
- 239000011232 storage material Substances 0.000 description 2
- 239000008261 styrofoam Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The utility model discloses a gas furnace for recovering flue gas waste heat by utilizing phase change heat storage, which comprises a shell, a combustor arranged in the shell, a combustion chamber with a smoke collecting hood at the top, a main heat exchanger and a phase change heat storage heat exchanger, wherein the combustor is positioned at the bottom of the combustion chamber, the combustion chamber is connected with a gas pipe, the phase change heat storage heat exchanger comprises a shell, a flue gas pipe and a heat exchange pipe which penetrate through the shell, and phase change materials filled in the shell, the inlet end of the flue gas pipe is connected with the smoke collecting hood, the outlet end of the flue gas pipe extends out of the shell of the gas furnace to exhaust flue gas, the inlet end of the heat exchange pipe is connected with a domestic hot water pipe, the main heat exchanger is arranged in the combustion chamber, the inlet end of the main heat exchanger is connected with a heating water return pipe, and the outlet end of the main heat exchanger is connected with a heating cold water outlet pipe. The utility model can efficiently utilize the flue gas waste heat, improve the heat efficiency, achieve the purposes of energy conservation and emission reduction, and solve the problems that the flue gas waste heat of the domestic gas furnace at present is wasted and domestic hot water and heating hot water cannot be supplied well at the same time.
Description
Technical Field
The utility model relates to a gas furnace, in particular to a gas furnace for recovering flue gas waste heat by utilizing phase change heat storage.
Background
Gas furnaces, especially wall-mounted gas furnaces, are commonly used to provide hot water for heating and domestic heating. The gas wall-mounted boiler in China can be divided into a condensation type wall-mounted boiler and a non-condensation type gas wall-mounted boiler, smoke discharged by the non-condensation type gas wall-mounted boiler contains a large amount of heat energy, the energy efficiency is low, the heat efficiency of the gas wall-mounted boiler can be effectively improved by reasonably recovering the waste heat of the smoke, and the gas wall-mounted boiler is an important way for realizing energy conservation and emission reduction.
The waste heat of the flue gas is divided into low temperature, medium temperature and high temperature according to the temperature. Wherein the temperature of the low-temperature flue gas waste heat is lower than 100 ℃, the temperature of the medium-temperature flue gas waste heat is 100-. Because the temperatures of the waste heat of the flue gas are different, the recovery methods are different. The continuous high-temperature flue gas waste heat can be directly used for heat pipes, waste heat boilers, coal economizers and the like, and the application of the medium-temperature flue gas waste heat and the low-temperature flue gas waste heat is limited due to low enthalpy value and discontinuity.
The phase change energy storage technology is one of flue gas waste heat recovery technologies, and the working principle of the phase change energy storage technology is as follows: the phase-change material absorbs heat and changes phase when contacting an object with higher temperature, absorbs energy in the phase-change process, and the absorbed energy is kept in a high-energy phase-change state; when the phase-change material continuously contacts with a lower-temperature object, reverse phase change occurs, and energy is released in the process.
Although people have proposed that the heat storage effect of the phase-change material is adopted to realize energy conservation, most of the research on recovering the flue gas waste heat through phase-change heat storage currently stays in the industries of industrial boilers, steel and the like, and no mature technology exists for applying the phase-change heat storage to the household gas furnace until now.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a gas furnace for recovering flue gas waste heat by utilizing phase change heat storage, which has the advantages of simple structure, low cost, energy conservation, emission reduction and improved heat efficiency.
The purpose of the utility model is realized by the following technical scheme: the utility model provides an utilize phase transition heat accumulation to retrieve gas furnace of flue gas waste heat, its characterized in that, it includes the shell, locates combustor, the top in the shell has combustion chamber, main heat exchanger and the phase transition heat accumulation heat exchanger of collection petticoat pipe, the combustor is located the bottom of combustion chamber, the gas pipe is connected to the combustion chamber, the phase transition heat accumulation heat exchanger includes the casing, passes the flue gas pipe and the heat exchange tube of casing and fills the phase change material in the casing, the inlet end and the collection petticoat pipe of flue gas pipe are connected, and the outlet end stretches out gas furnace shell exhaust flue gas, life cold water pipe is connected to the inlet end of heat exchange tube, and life hot-water line is connected to the outlet end, main heat exchanger locates in the combustion chamber, the inlet end of main heat exchanger is connected the heating wet return, and the heating outlet pipe is connected to the outlet end.
The utility model applies the phase change heat storage to recover the flue gas waste heat to the gas furnace, particularly recovers the flue gas waste heat through the phase change heat storage heat exchanger, and utilizes the part of heat energy to heat the domestic hot water, the utility model can efficiently utilize the flue gas waste heat, improve the heat efficiency, achieve the purposes of energy saving and emission reduction, and solve the problems that the domestic gas furnace at present wastes the flue gas waste heat and can not supply domestic hot water and heating hot water well; in addition, the utility model has simple structure, low cost and strong practicability, and is suitable for wide popularization and use.
When the temperature of hot water from the phase-change heat storage heat exchanger is lower than a set temperature, an auxiliary heat exchanger is additionally arranged in a gas furnace shell, the auxiliary heat exchanger is provided with two pairs of water inlets and water outlets, one pair of water inlets and water outlets are respectively connected with a heating water return pipe and a heating water outlet pipe through a heating connecting pipe, the other pair of water inlets and water outlets are connected with a domestic hot water pipe through a domestic hot water connecting pipe, domestic hot water from the phase-change heat storage heat exchanger enters the auxiliary heat exchanger to exchange heat with the heating hot water and then is supplied out, the waste heat of smoke can be efficiently utilized, and the heat efficiency of the gas furnace is improved.
Preferably, the flue gas pipe is positioned at the lower part of the phase change heat storage heat exchanger, the heat exchange pipe is positioned at the upper part of the phase change heat storage heat exchanger, namely the heat exchange pipe is positioned above the flue gas pipe, and when the heat release fluid is positioned at the lower part of the phase change heat storage heat exchanger, the melted phase change material forms convection under the action of buoyancy, so that the heat exchange effect can be improved.
The temperature of the outlet of the smoke pipe may be lower than the dew point temperature of the smoke, so that the smoke is condensed at the outlet and generates condensed water.
The utility model is characterized in that a water tank is arranged outside a furnace body of the gas furnace and is connected with a heating water return pipe.
A bypass pipe is connected between the heating water return pipe and the heating water outlet pipe, and an automatic bypass valve is arranged on the bypass pipe.
The phase-change material adopts paraffin with the melting point higher than 40 ℃, sodium acetate trihydrate or a nano metal/paraffin composite phase-change heat storage material.
The outer wall of the shell of the phase change heat storage heat exchanger is covered with a heat insulation material.
According to the utility model, the outlet of the domestic hot water pipe is provided with the water mixing valve, and if the temperature of the hot water from the phase change heat storage heat exchanger is higher than the set temperature, part of cold water is mixed in through the water mixing valve before being discharged through the domestic hot water pipe and then is adjusted to the set temperature.
The gas furnace comprises a controller, a temperature control switch connected with the controller, a first temperature sensor, a second temperature sensor, a one-way valve, a safety valve, a water pressure gauge, a water pump, a first three-way valve, a second three-way valve and a fan, wherein the temperature control switch is arranged on a heating water outlet pipe and is close to the outlet end of a main heat exchanger, the first temperature sensor is arranged on the heating water outlet pipe, and the second temperature sensor is arranged on a domestic hot water pipe; the one-way valve is arranged on the domestic hot water pipe and is positioned between the connection parts of the pair of water inlets and the pair of water outlets of the auxiliary heat exchanger on the domestic hot water pipe; the water pump, the water pressure gauge and the safety valve are all arranged on the heating water return pipe, the water pump is positioned between the inlet end of the main heat exchanger and the connecting part of the auxiliary heat exchanger on the heating water return pipe, the water pressure gauge is arranged in front of the safety valve, and the water pressure gauge and the safety valve are positioned between the auxiliary heat exchanger and the connecting part of the bypass pipe on the heating water return pipe; the first three-way valve is arranged on the heating water outlet pipe and connected with the heating connecting pipe, and the second three-way valve is arranged on the domestic hot water pipe and connected with the domestic hot water connecting pipe.
Compared with the prior art, the utility model has the following remarkable technical effects:
the phase change heat storage recycling smoke waste heat is applied to the gas furnace, particularly, the smoke waste heat is recycled through the phase change heat storage heat exchanger, the heat energy is used for heating domestic hot water, the domestic hot water is heated by the aid of the instant heating type, cold water enters the phase change heat storage heat exchanger for heat exchange to produce domestic hot water, and the domestic hot water enters the auxiliary heat exchanger for heat exchange with heating hot water and then is supplied when the water temperature is insufficient.
The wall-mounted gas stove is simple in structure, low in cost, high in practicability and suitable for wide popularization and use, is suitable for non-condensation type gas wall-mounted furnaces, is also suitable for condensation type wall-mounted furnaces, and is only weak in heat storage effect compared with the non-condensation type wall-mounted furnaces.
Drawings
The utility model is described in further detail below with reference to the figures and the specific embodiments.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of a phase change heat storage heat exchanger according to the present invention;
FIG. 3 is a second schematic structural diagram of the phase change heat storage heat exchanger according to the present invention;
fig. 4 is a third schematic structural diagram of the phase change heat storage heat exchanger according to the present invention.
Detailed Description
As shown in fig. 1 to 4, the gas furnace for recovering the waste heat of the flue gas by using phase change heat storage of the utility model comprises a shell 29, a burner 11 arranged in the shell 29, a combustion chamber 18 with a smoke collecting hood 14 at the top, a main heat exchanger 13, a phase change heat storage heat exchanger 15 and an auxiliary heat exchanger 24, wherein the burner 11 is positioned at the bottom of the combustion chamber 18, the combustion chamber 18 is connected with a gas pipe 4, the phase change heat storage heat exchanger 15 comprises a shell 30, a heat insulating layer 31 covering the outer wall of the shell 30, a flue gas pipe 32 and a heat exchange pipe 33 penetrating through the shell 30 and the heat insulating layer 31, and a phase change material filled in the shell 30, in this embodiment, the housing 30 is made of aluminum, the insulating layer 31 is made of styrofoam, and the styrofoam has a thermal conductivity of 0.033W/(m · K) for heat preservation, so as to prevent the phase change material from directly and excessively dissipating heat to the environment. The phase-change material is paraffin with a melting point higher than 40 ℃, sodium acetate trihydrate or a nano metal/paraffin composite phase-change heat storage material. The inlet end of a flue gas pipe 32 is connected with the smoke collecting hood 14, the outlet end of the flue gas pipe 32 extends out of the gas furnace shell 29 to discharge flue gas, the inlet end of a heat exchange pipe 33 is connected with a domestic cold water pipe 1, the outlet end of the heat exchange pipe 33 is connected with a domestic hot water pipe 3, a main heat exchanger 13 is arranged in the combustion chamber 18, the inlet end of the main heat exchanger 13 is connected with a heating water return pipe 2, and the outlet end of the main heat exchanger 13 is connected with a heating water outlet pipe 6.
When the heat release fluid is positioned at the lower part of the phase change heat storage heat exchanger, the melted phase change material forms convection under the action of buoyancy, and the heat exchange effect can be improved. The flue gas pipe 32 and the heat exchange pipe 33 can use a corrugated pipe or a finned pipe, in this embodiment, the flue gas pipe 32 and the heat exchange pipe 33 use the finned pipe, wherein the flue gas pipe 32 is composed of a header pipe, branch pipes and fins 34, the fins 34 are installed on the branch pipes, and both ends of each branch pipe are connected with the header pipe, as shown in fig. 2 and 3, the flue gas enters the phase change heat storage heat exchanger 15 from the header pipe, heat is released to the phase change material through each branch pipe and the fins 34, the dew point temperature of the flue gas is generally about 55 ℃, although the phase change temperature of the phase change material is 58 ℃, the phase change material may be lower than the phase change temperature and be in a solid state, the outlet temperature of the flue gas may be lower than 55 ℃, condensation occurs and condensate water is generated, so a condensate pipe 28 is connected to the position on the flue gas pipe 32 close to the outlet, and the condensate pipe 28 extends downwards out of the gas furnace shell 29 to discharge the condensate water. The heat exchange tube 33 is a serpentine tube, and a fin 34 is attached to the serpentine tube. The auxiliary heat exchanger 24 is a plate heat exchanger having two pairs of water inlets and water outlets, wherein one pair of water inlets and water outlets are respectively connected with the heating water return pipe 2 and the heating water outlet pipe 6 through the heating connecting pipe 35, and the other pair of water inlets and water outlets are connected with the domestic hot water pipe 3 through the domestic hot water connecting pipe 36.
A water tank 20 is arranged outside the furnace body of the gas furnace, and the water tank 20 is connected with the heating water return pipe 2. A bypass pipe 37 is connected between the heating water return pipe 2 and the heating water outlet pipe 6, and an automatic bypass valve 7 is provided on the bypass pipe 37. A water mixing valve 27 is arranged at the outlet of the domestic hot water pipe 3.
The water heater further comprises a controller, a temperature control switch 12 connected with the controller, a first temperature sensor 9, a second temperature sensor 25, a one-way valve 5, a safety valve 23, a water pressure gauge 22, a water pump 21, a first three-way valve 8, a second three-way valve 26 and a fan 17, wherein the temperature control switch 12 is arranged on the heating water outlet pipe 6 and is close to the outlet end of the main heat exchanger 13, the first temperature sensor 9 is arranged on the heating water outlet pipe 6, the second temperature sensor 25 is arranged on the domestic hot water pipe 3, and the one-way valve 5 is arranged on the domestic hot water pipe 3 and is positioned between the connection parts of a pair of water inlets and water outlets of the auxiliary heat exchanger 24 on the domestic hot water pipe 3; the water pump 21, the water pressure gauge 22 and the safety valve 23 are all arranged on the heating water return pipe 2, the water pump 21 is positioned between the inlet end of the main heat exchanger 13 and the connecting part of the auxiliary heat exchanger 24 on the heating water return pipe 2, the water pressure gauge 22 is positioned in front of the safety valve 23, and the water pressure gauge 22 and the safety valve 23 are positioned between the connecting parts of the auxiliary heat exchanger 24 and the bypass pipe 37 on the heating water return pipe 2; the first three-way valve 8 is arranged on the heating water outlet pipe 6 and connected with the heating connecting pipe 35, and the second three-way valve 26 is arranged on the domestic hot water pipe 3 and connected with the domestic hot water connecting pipe 36.
The working process of the utility model is as follows:
the gas enters the gas furnace from the gas pipe 4, the air-fuel ratio is adjusted through the gas proportional valve 10, then the gas enters the combustion chamber, the combustor ignites the gas under the control of the ignition induction needle 19, the smoke generated by combustion is collected by the smoke collecting hood, the smoke and the main heat exchanger 13 exchange heat and then enter the phase change heat storage heat exchanger 15 to exchange heat with the phase change material therein, the phase change material is heated, the temperature of the smoke is reduced, finally the smoke is discharged through the fan 17 controlled by the wind pressure switch 16 at the outlet end of the smoke pipe 32, and condensed water is discharged from the condensed water pipe.
Heating medium water flows into the gas furnace from the heating water return pipe 2, is provided with circulating power by the water pump 21, absorbs heat in the main heat exchanger 13 to obtain heating hot water, and finally flows out from the heating water outlet pipe 6.
When the domestic hot water is started, cold water enters from the domestic cold water pipe 1, firstly, heat is obtained through heat exchange of the phase change heat storage heat exchanger 15, the second temperature sensor 25 detects the temperature of the hot water after passing through the phase change heat storage heat exchanger 15, if the temperature of the hot water is higher than a set temperature, the hot water is directly connected to the domestic hot water pipe 3 through the second three-way valve 26, and the temperature is adjusted to the set temperature after part of the cold water is mixed in through the water mixing valve 27; if the temperature of the water is lower than the set temperature, the water is controlled to enter the plate heat exchanger through the second three-way valve 26, meanwhile, the heating hot water is controlled to enter the plate heat exchanger through the first three-way valve 8, the heating hot water heats the domestic hot water to the set temperature, and then the domestic hot water is supplied through the domestic hot water pipe 3.
The utility model can basically meet the consumption of hot water for life in peak time period by utilizing the residual heat of the flue gas, but the frequency and the water consumption of bathing can be influenced by considering factors such as different seasons, different regions, whether the bathing is a holiday and the like. It is difficult to ensure that the bathing hot water is sufficiently supplied under any condition only by the residual heat of the flue gas.
In consideration of intermittent use time of domestic hot water, domestic hot water is used in washing, kitchen water, bathing and the like. The recovered flue gas waste heat can meet the requirement of daily domestic hot water supply for removing the bath hot water part, but when the bath hot water is supplied, the domestic hot water may need to obtain heat through the plate heat exchanger.
The energy-saving effect of the utility model is very remarkable, although the gas furnace of the utility model with common capacity can not directly adopt a phase-change heat storage heat supply mode to provide sufficient hot water for all life of three families, the gas furnace is assisted with direct gas heating and is sufficient for daily use. More importantly, the gas stove of the utility model can bring direct and remarkable energy-saving effect to users, and reduce the household energy expenditure.
Therefore, it should be understood that the present invention can be modified, replaced or changed in many ways without departing from the basic technical idea of the utility model, and the utility model is protected by the appended claims.
Claims (9)
1. The utility model provides a utilize phase transition heat accumulation to retrieve gas furnace of flue gas waste heat which characterized in that: it includes the shell, locates combustor, main heat exchanger and the phase change heat accumulation heat exchanger that combustor, top in the shell have the collection petticoat pipe, the combustor is located the bottom of combustor, the gas pipe is connected to the combustor, the phase change heat accumulation heat exchanger includes the casing, passes the flue gas pipe and the heat exchange tube of casing and fills the phase change material in the casing, the inlet and the collection petticoat pipe of flue gas pipe are connected, and the outlet stretches out gas furnace shell exhaust flue gas, the life cold water pipe is connected to the inlet of heat exchange tube, and the life hot-water line is connected to the outlet, main heat exchanger locates in the combustor, the heating wet return is connected to the inlet of main heat exchanger, and the heating outlet pipe is connected to the outlet.
2. The gas furnace for recovering the waste heat of the flue gas by utilizing the phase change heat storage as claimed in claim 1, wherein: an auxiliary heat exchanger is additionally arranged in the gas furnace shell and is provided with two pairs of water inlets and water outlets, wherein one pair of water inlets and water outlets are respectively connected with a heating water return pipe and a heating water outlet pipe through a heating connecting pipe, and the other pair of water inlets and water outlets are connected with a domestic hot water pipe through a domestic hot water connecting pipe.
3. The gas furnace for recovering the waste heat of the flue gas by utilizing the phase change heat storage as claimed in claim 2, wherein: the flue gas pipe is located on the lower portion of the phase change heat storage heat exchanger, and the heat exchange pipe is located on the upper portion of the phase change heat storage heat exchanger, namely the heat exchange pipe is located above the flue gas pipe.
4. A gas furnace for recovering the waste heat of the flue gas by utilizing phase change heat storage as claimed in claim 3, wherein: and the outer wall of the shell of the phase change heat storage heat exchanger is covered with a heat insulation material.
5. The gas furnace for recovering the waste heat of the flue gas by utilizing the phase change heat storage as claimed in claim 4, wherein: and a condensate pipe is connected to the position, close to the outlet, of the flue gas pipe, and the condensate pipe extends downwards out of the gas furnace shell to discharge condensate water.
6. The gas furnace for recovering the waste heat of the flue gas by utilizing the phase change heat storage as claimed in claim 5, wherein: and a water tank is arranged outside the furnace body of the gas furnace and is connected with a heating water return pipe.
7. The gas furnace for recovering the waste heat of the flue gas by utilizing the phase change heat storage as claimed in claim 6, wherein: and a bypass pipe is connected between the heating water return pipe and the heating water outlet pipe, and an automatic bypass valve is arranged on the bypass pipe.
8. The gas furnace for recovering the waste heat of the flue gas by utilizing the phase change heat storage as claimed in claim 7, wherein: and a water mixing valve is arranged at the outlet of the domestic hot water pipe.
9. The gas furnace for recovering the waste heat of the flue gas by utilizing the phase change heat storage as claimed in claim 8, wherein: the gas furnace comprises a controller, a temperature control switch connected with the controller, a first temperature sensor, a second temperature sensor, a one-way valve, a safety valve, a water pressure gauge, a water pump, a first three-way valve, a second three-way valve and a fan, wherein the temperature control switch is arranged on a heating water outlet pipe and is close to the outlet end of the main heat exchanger, the first temperature sensor is arranged on the heating water outlet pipe, and the second temperature sensor is arranged on the domestic hot water pipe; the one-way valve is arranged on the domestic hot water pipe and is positioned between the connection parts of the pair of water inlets and the pair of water outlets of the auxiliary heat exchanger on the domestic hot water pipe; the water pump, the water pressure gauge and the safety valve are all arranged on the heating water return pipe, the water pump is positioned between the inlet end of the main heat exchanger and the connecting part of the auxiliary heat exchanger on the heating water return pipe, the water pressure gauge is positioned in front of the safety valve, and the water pressure gauge and the safety valve are positioned between the auxiliary heat exchanger and the connecting part of the bypass pipe on the heating water return pipe; the first three-way valve is arranged on the heating water outlet pipe and connected with the heating connecting pipe, and the second three-way valve is arranged on the domestic hot water pipe and connected with the domestic hot water connecting pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121264296.XU CN215724135U (en) | 2021-06-07 | 2021-06-07 | Gas furnace for recovering flue gas waste heat by utilizing phase change heat storage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121264296.XU CN215724135U (en) | 2021-06-07 | 2021-06-07 | Gas furnace for recovering flue gas waste heat by utilizing phase change heat storage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215724135U true CN215724135U (en) | 2022-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121264296.XU Active CN215724135U (en) | 2021-06-07 | 2021-06-07 | Gas furnace for recovering flue gas waste heat by utilizing phase change heat storage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215724135U (en) |
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2021
- 2021-06-07 CN CN202121264296.XU patent/CN215724135U/en active Active
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| TR01 | Transfer of patent right |
Effective date of registration: 20240612 Address after: 518100, No. 1206, Biwan Building, Haibin New Village, Gushu Community, Xixiang Street, Bao'an District, Shenzhen City, Guangdong Province, China Patentee after: Shenzhen Jilian Energy Co.,Ltd. Country or region after: China Address before: 400044 No. 174 Sha Jie street, Shapingba District, Chongqing Patentee before: Chongqing University Country or region before: China |