CN2234584Y - Water heater with forced smoke exhausting device - Google Patents

Abstract

The utility model relates to a water heater with a forced smoke exhausting device. The fume extractor of the water heater with a forced smoke exhausting device mounts a high-speed fan and a safety valve to the heat exchanger exhaust port in the water heater. The safety valve is provided with a micro switch. When the micro switch is communicated, the electromagnetic valve (or the controller) in the water heater are communicated by a conducting wire to make the water heater to work. The exhaust port of the high-speed fan is joined with a purge tube with a phi 50 mm pipe diameter.

Description

Water heater with forced fume exhaust device

The utility model relates to gas combustion apparatus.

With the water heater of fuel gas buring as heat energy, used widely by people, when using water heater, combustion gas burn fully and the safety measure that prevents to leak gas of crucial importance.Safety in the time of will considering water heater working especially when making water heater and its fume exhausting type, to guarantee result of use and safe in utilization, therefore, the product that dispatches from the factory must meet the regulation of GB GB6932-94.In existing general Flue Gas Water Heater and install as shown in Figure 1, the smoke exhaust pipe 8 that connects a flue caliber 〉=φ 120mm at water heater exhaust opening place, and an anti-down draught hood 12 has been installed at exhaust opening and smoke exhaust pipe connection place, smoke exhaust pipe 8 stretches out outside the wall 10, port at smoke exhaust pipe is equipped with anti-blast cap 13, and anti-blast cap will exceed roof 600mm.Such smoke exhaust pipe is installed very inconvenient, and particularly for high-rise building, outdoor section is installed very difficult.Because the smoke exhaust pipe diameter is bigger, indoor installation is also inconvenient, and influences the attractive in appearance of room.

The purpose of this utility model is under the situation that meets GB GB6932-94 regulation, designs a kind of water heater with mandatory fume extractor, installs and operation with being convenient to the size that reduces the water heater smoke exhaust pipe.

In order to realize the above object, its structure of the water heater with forced fume exhaust device of designing is as follows, a high speed is equipped with at the top of the heat exchanger smoke evacuation in water heater, and on blower fan 1 and blower fan 1 shell, rubber tube 2 is housed, pipe 2 connects with a port A of safety valve 3, one side of safety valve is equipped with a microswitch 4, with two leads 5 microswitch 4 is connected with magnetic valve (or controller) 6 in the water heater 9, is connected to the smoke exhaust pipe that caliber is φ 50mm on the blower housing exhaust opening.The safety valve here is special, and it forms a cavity with left chamber 18 and right chamber 19 by eardrum 15, valve body 16, and little axle 17 is housed on the eardrum 15 in this cavity, is equipped with microswitch 4 in the outside in chamber 18, a safety valve left side.The high speed winds function that adopts is installed in and requires rotating speed greater than 2700 revolutions per seconds in the water heater, and after requiring to satisfy the flue gas that produces behind the fuel gas buring and room air mixing by 1: 1, drain into outdoor by caliber φ 50mm smoke exhaust pipe, make flue gas control flue gas velocity through preceding the mixing with air of blower fan, being unlikely influences combustion conditions.

Water heater with forced fume exhaust device provided by the utility model; owing to be provided with the safety valve safeguard measure in the fume extractor; index meets the regulation among the GB6932-94: when blast is less than 80Pa in pressure regulating box; burner combustion should not have that flame-out, tempering and influence use in the water heater from the flame phenomenon; when blast surpasses 80Pa; burner combustion generation tempering or before flame, safety valve start, close fuel gas path, guarantee safety.Adopt the outdoor section of the utility model smoke exhaust pipe, only need stretch out outdoor 100mm and get final product, this shows, the water heater with forced fume exhaust device that the utility model provides has easy to operate, safe in utilization and advantages such as easy is installed.

Description of drawings:

Fig. 1 is existing Flue Gas Water Heater and scheme of installation

Wherein: 8-smoke exhaust pipe; 9-water heater; 10-wall; 12-anti-down draught hood; 13-anti-blast cap.

Fig. 2 is mandatory fume extractor and the scheme of installation that the utility model provides

Wherein: 1-high-speed fan; 2-rubber tube; 3-safety valve; 4-microswitch; 5-lead; 6-magnetic valve or controller; 7-heat exchanger; 8-smoke exhaust pipe; 9-water heater; 1U-wall.

Fig. 3 safety valve structure figure

Wherein: 4-microswitch; 15-eardrum; 16-valve body; 17-axle; 18-left chamber; 19-right chamber.

In conjunction with the accompanying drawings 2, accompanying drawing 3, use to example and further specify the utility model with forward's board JSTD8-QF24 type Flue Gas Water Heater.

By accompanying drawing 2 as seen, when using water heater, after high-speed fan 1 energising, blower fan rotates, get negative pressure at the blower fan outer wall, see that by rubber tube 2 accompanying drawing 3 enters the right chamber 19 of safety valve from the A port of safety valve, make left chamber 18 and right chamber 19 produce draught head, eardrum 15 drove little axle 17 and moved right this moment, two normally-closed contacts of microswitch 4 are connected (when about during two cavity pressure balances, the state that microswitch is in out), by magnetic valve or the controller 6 in the lead 5 connection water heaters, this moment, water heater was started working, igniting, make the water heater 9 can big fire burns, the flue gas behind the fuel gas buring mixes with air after blower fan is drawn into smoke exhaust pipe 8 drains into outdoor.

When external wind pressure＜80Pa, because smoke exhaust pipe 8 is designed to have the ability of certain Wind-Pressure Resistance, the unlikely water heater combustion conditions that influences.As the excessive (＞80Pa of external wind pressure; And burner backfire, before flame) or smoke evacuation blocked path, cause smoke evacuation difficulty, wind speed reduces in the blower fan, therefore, the negative pressure of taking out from the blower fan outer wall also reduces.When dropping to certain value; the pressure in the right chamber 19 of safety valve increases among Fig. 3, and when reaching with left chamber balance, axle 17 is moved to the left; microswitch 4 resets; two leads 5 disconnect, and make magnetic valve or controller 6 outages in the water heater, and gas circuit is closed; the water heater burn-out; make the indoor too much flue gas that is unlikely, be subjected to prestige association to cause the life life, to reach the purpose of safeguard protection.

Claims (2)

1, the water heater that has the forced fume exhaust device, comprise water heater and fume extractor, it is characterized in that this fume extractor is the heat exchanger exhaust opening place at water heater, a high-speed fan (1) and the rubber mouth of pipe (2) are installed, one end of pipe (2) connects with a port A of safety valve (3), one side of safety valve is equipped with microswitch (4), lead (5) is connected to the smoke exhaust pipe that caliber is φ 50mm with magnetic valve (6) UNICOM in microswitch (4) and the water heater (9) on the exhaust opening of high-speed fan.

2, the water heater of forced fume exhaust device according to claim 1, it is characterized in that the safety valve in its fume extractor is made of a cavity with left chamber (18) and right chamber (19) eardrum (15), valve body (16), little axle (17) is housed on the eardrum in this cavity, microswitch (4) is installed in the outside of safety valve left side control.

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