CN201090955Y - Condensing type gas heating water boiler - Google Patents

Abstract

The utility model relates to a household gas water heater, providing a condensing gas heating water heater. The utility model includes a heating system and a waterway system, wherein, the heating system is provided with a gas- inlet pipe, an air- inlet pipe, an air blower, a mixing- gas guide tube, a burner, a heat exchanger and a gas discharge pipe; the waterway system is provided with a heating return pipe, a circulating pump, a heat exchanger water inlet tube, a heat exchanger water outlet tube, a heating water outlet tube, a plate heat exchanger, a domestic water inlet tube, a domestic water outlet tube, a three- way valve and a safety valve. The utility model is characterized in that the heat exchanger is a cylindrical heat exchanger; the burner is inserted and hung on the upper part inside the cylinder body; the upper end of the cylinder body is communicated with the air blower through the mixing- gas guide tube; the lower end of the heat exchanger cylinder body is communicated with the gas discharge pipe. Compared with the conventional water heater, the utility model has the advantages of reasonable and compact structure, small occupied area, high efficiency, energy saving, safeness and durableness, various functions like water heating, convenient cleaning and maintenance and environmental protection.

Description

Condensing gas heating water heater

technical field

The utility model relates to a domestic gas water heater, in particular to a condensing gas heating water heater.

Background technique

At present, the main heat exchanger of most gas-fired heating water heaters is a traditional tube-fin structure, that is, the outer surface of the heat exchange pipe is covered with one row or several rows of heat dissipation fins, and the heat dissipation fins are heated by the fuel combustion flame, and the heat is regenerated. Heat transfer to the heat exchange tubes to heat the water flowing through the water pipes. The heat transfer area of the heat exchanger with this structure is relatively small, and after a period of use, cracks are likely to occur between the cooling fins and the heat exchange water pipes, resulting in poor heat transfer. The heat efficiency of this kind of water heater is lower, wastes more energy.

In existing small and medium-sized gas-fired water heaters, the furnace is mostly at the bottom of the water heater, and a certain number and diameter of smoke exhaust pipes are arranged vertically above the furnace to discharge the smoke. The structure is not reasonable, the gas cannot be fully burned, the high temperature of the chimney discharge has a serious impact on the atmosphere, the main heat exchanger is mostly a traditional tube-fin structure, the heat exchange process is insufficient, and the thermal efficiency is low. The heating furnace of the control system has a complex structure and high heating costs, which is not easy for ordinary families to accept.

Contents of utility models

The purpose of this utility model is to provide a new type of condensing gas heating water heater, which overcomes the shortcomings of existing water heaters, and has the characteristics of small volume and high thermal efficiency.

The purpose of this utility model is achieved by the following scheme:

A condensing gas heating water heater, including a gas heating system and a heating water system, wherein the gas heating system includes a gas inlet pipe, an air inlet pipe, a blower, a mixed gas conduit, a burner, a heat exchanger, and a flue gas discharge The heating water system includes heating return pipes, circulating water pumps, heat exchanger inlet pipes, heat exchangers, heat exchanger outlet pipes, and heating outlet pipes. It is characterized in that:

The heat exchanger is a cylindrical internal combustion heat exchanger. The heat exchanger has a cylindrical body. One end of the cylindrical body is a combustion chamber, and the other end is a flue gas outlet. The cylindrical body is equipped with a spiral heat exchange water pipe. The two ends of the exchange water pipe are respectively provided with a water inlet joint and an outlet pipe joint, the water inlet joint is connected to the heat exchanger water inlet pipe, the water outlet pipe joint is connected to the heat exchanger outlet water pipe, and several heat collecting rods are suspended on the inner wall of the cylinder;

The burner is inserted into the combustion chamber, the combustion chamber port of the cylindrical body is sealed and communicated with the mixed gas duct, the air outlet of the blower is connected to the mixed gas duct, the gas inlet pipe and the air inlet pipe are connected to the air inlet of the blower; the smoke exhaust pipe is connected to to the flue gas outlet of the heat exchanger;

The heating water return pipe is connected to the heat exchanger water inlet pipe through the circulating water pump, and the heat exchanger water outlet pipe is connected to the heating water outlet pipe.

The further design is to increase the domestic water system: use a three-way valve to connect the heat exchanger outlet pipe, heating outlet pipe and hot water inlet pipe of the plate heat exchanger, and connect the hot water outlet pipe of the plate heat exchanger to the circulating water pump. Use cold and hot water pipes to connect with the domestic water inlet and outlet of the plate heat exchanger respectively.

As an optimization, the mixed gas duct and the combustion chamber of the heat exchanger are connected by a rotary embedded connection, and a fixed block is provided outside.

As an optimization, the cylindrical internal combustion heat exchanger is installed upside down, the combustion chamber is on the top, the flue gas outlet is on the bottom, and the air outlet of the blower is connected to the combustion chamber through a short mixed gas duct.

As an optimization, the flue gas discharge pipe is located next to the heat exchanger, and the lower end of the flue gas discharge pipe is connected to the flue gas discharge port of the heat exchanger through a connecting plate provided with a communication pipe inside.

Its working principle is: in the heating system, gas and air enter the gas inlet pipe and air inlet pipe respectively to form a mixed gas, which is sent to the burner through the blower through the mixed gas pipe, and the burner burns the mixed gas to heat the cylinder and the heat exchanger. The heat collecting rod, the combustion exhaust gas is discharged from the flue gas discharge pipe; in the water system, the heating return water flows into the heat exchanger through the heating return water pipe through the circulating water pump and the heat exchanger inlet pipe, and the inlet water flows through the spiral water pipe in the heat exchanger and the heat exchanger. The exchanger performs heat exchange, and the hot water flows out from the outlet pipe of the heat exchanger into the heating outlet pipe for heating.

When the domestic water system is connected, the utility model can be used as a dual-purpose water heater for heating and domestic use, and can be switched through the three-way valve. When the three-way valve is switched to heating water, the working principle is as described above. When switching to domestic water, the hot water in the heat exchanger flows through the plate heat exchanger, the high-temperature hot water heats the plate heat exchanger, the domestic water flows through the plate heat exchanger, and the plate heat exchanger transfers heat to the domestic water. Domestic water is heated for domestic use.

Compared with the prior art, the utility model has a reasonable and compact structure and takes up less space. The combustion chamber adopts a cylindrical closed structure, and the oxygen used for combustion and the exhaust gas can be used outdoors to ensure safe use; the gas and air are in the blower and The mixed gas enters the combustion chamber for combustion after being fully homogenized in the duct, so that the combustion is more complete. Therefore, the utility model has the characteristics of high efficiency, energy saving, safety and durability.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of the connection and assembly of the mixed gas conduit and the heat exchanger of the present invention.

Detailed ways

Referring to Figure 1, Figure 1 shows a condensing gas heating water heater of the present invention, which includes a gas heating system and a heating water system, wherein the gas heating system includes a gas inlet pipe 1, an air inlet pipe 2, a blower 3. Mixed gas conduit 4, sealing ring 5, burner (not shown in the figure), heat exchanger 6, flue gas discharge pipe 7, heating water system includes heating return pipe 8, circulating water pump 9, heat exchanger inlet pipe 10. Heat exchanger 6, heat exchanger outlet pipe 11, heating outlet pipe 12,

The heat exchanger 6 is a cylindrical internal combustion heat exchanger. The heat exchanger 6 has a cylindrical body 61. One end of the cylindrical body 61 is a combustion chamber 62, and the other end is a flue gas outlet 63. The cylindrical body 61 Use the spiral plate 64 and the shell 65 to form a spiral heat exchange pipe. The two ends of the heat exchange pipe are respectively provided with a water inlet pipe joint 66 and an outlet pipe joint 67. The water inlet pipe joint 66 is connected to the heat exchanger water inlet pipe 10 and the water outlet pipe joint. 67 is connected to the water outlet pipe 11 of the heat exchanger, and several heat collecting rods 68 are hung on the inner wall of the cylinder body 61;

The burner (not shown in the figure) is inserted in the combustion chamber 62, the combustion chamber port of the cylindrical body 61 is in sealing communication with the mixed gas conduit 4, the air outlet of the blower 3 is connected with the mixed gas conduit 4, and the gas inlet pipe 1 and the air inlet The air pipe 2 is connected to the air inlet of the blower 3; the smoke discharge pipe 7 located next to the heat exchanger 6 is connected to the smoke discharge port 63 of the heat exchanger 6 through a connecting plate 71 with a communication pipe inside.

Its working principle is: in the gas heating system, gas and air respectively enter from the gas inlet pipe 1 and the air inlet pipe 2 to form a mixed gas, which is sent to the burner through the blower 3 through the mixed gas conduit 4, and is located in the combustion chamber 62 of the cylindrical body 6. The burner inside burns the mixed gas to produce hot flue gas, which heats the cylindrical body 62 of the heat exchanger 6 and the heat collecting rod 68, and the combustion exhaust gas is discharged from the flue gas discharge pipe 7; in the heating water system, the heating return water is provided by The heating return pipe 8 flows into the heat exchanger 6 through the circulating water pump 9 and the heat exchanger inlet pipe 10, and the inlet water flows through the spiral water pipe in the heat exchanger 6 to exchange heat with the heat exchanger, and the hot water flows out from the heat exchanger outlet pipe 11 Access the heating outlet pipe 12 for heating use.

The above scheme is designed for heating, and the further design is to increase the domestic water system: use a three-way valve 121 to connect the heat exchanger outlet pipe 11, the heating outlet pipe 12 and the hot water inlet pipe of the plate heat exchanger 13, and the plate heat exchange The hot water outlet pipe of the device 13 is connected to the circulating water pump 9, and the domestic cold and hot water pipes are connected with the domestic water inlet 132 and the water outlet 133 of the plate heat exchanger 13 respectively.

During use, the heating or domestic water is switched through the three-way valve 121 .

Combined with Fig. 2, for the convenience of installation and disassembly, the mixed gas conduit 4 of this example and the upper port of the heat exchanger cylinder 61 are connected by rotating and embedded. The buckle ear 69 is provided with a buckle block 41 matched with the buckle ear 69 on the outer edge of the connecting end of the mixed gas conduit 4, and the locking device includes a lock post 60 arranged at the end face of the heat exchanger cylinder 61, a The locking block 42 and the locking plate 43 on the outer edge of the connecting end of the mixed gas conduit 4,

Claims (5)

1. a condensed type combustion gas heating hot water stove comprises gas heating system and heating water circuit system, wherein, gas heating system includes gas inlet pipe, air intake duct, air blast, gas mixture conduit, burner, heat exchanger, smoke discharge pipe, the heating water circuit system includes heating return pipe, water circulating pump, the heat exchanger water inlet pipe, heat exchanger, heat exchanger outlet pipe, the heating outlet pipe is characterized in that:

Heat exchanger is a cylindrical shape internal combustion type heat exchanger, this heat exchanger has a cylinder, an end is the combustion chamber in the cylinder, the other end is a flue gas discharge opening, cylinder is provided with spiral heat exchange water pipe, and place, heat exchange water pipe two ends is provided with admitting pipe joint and titting water outlet respectively, and admitting pipe joint connects the heat exchanger water inlet pipe, titting water outlet connects the heat exchanger outlet pipe, and the cylinder inwall is hung with several thermal-arrest rods;

Burner is inserted in the combustion chamber, the combustion chamber port of cylinder and gas mixture conduit sealing UNICOM, and the air outlet of air blast is connected with gas mixture conduit, and gas inlet pipe and air intake duct are connected to the air inlet of air blast; Smoke discharge pipe is connected to the flue gas discharge opening of heat exchanger;

The heating return pipe is connected to the heat exchanger water inlet pipe by water circulating pump, and the heat exchanger outlet pipe is connected with the heating outlet pipe.

2. condensed type combustion gas heating hot water stove as claimed in claim 1, it is characterized in that also being provided with domestic water system: the hot water inlet pipe with heat exchanger outlet pipe, heating outlet pipe and plate type heat exchanger is connected with a triple valve, the hot water outlet pipe of plate type heat exchanger is connected to water circulating pump, and life is connected with life water Inlet and outlet water, the mouth of plate type heat exchanger respectively with hot and cold water pipe.

3. condensed type combustion gas heating hot water stove as claimed in claim 1 or 2 is characterized in that: gas mixture conduit adopts embedded connection of rotation with the heat exchanger combustion chamber, joins fixedly fixture block outward.

4. condensed type combustion gas heating hot water stove as claimed in claim 1 or 2, it is characterized in that: cylindrical shape internal combustion type heat exchanger is for being inverted erect-type installation, the combustion chamber is last, and flue gas discharge opening is following, and blower outlet is connected with the combustion chamber by short gas mixture conduit.

5. condensed type combustion gas heating hot water stove as claimed in claim 4, it is characterized in that: smoke discharge pipe is positioned at by the heat exchanger, and the smoke discharge pipe lower end connects with the flue gas discharge opening of heat exchanger by the connecting plate that is provided with cross over pipe in.

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