CN101726092A - Energy efficient induced air gas water heater - Google Patents

Abstract

An energy efficient induced air gas water heater includes a water tank; a flue associated with the water tank; a burner that combusts a mixture that creates combustion products that pass through the flue; a blower that receives the combustion products from an outlet of the flue; a damper that movably covers and uncovers the flue outlet or an outlet of the blower, the damper being in an open position when the burner and/or the blower are operating and being in a closed position when the burner or the blower are not operating.

Description

Energy-conservation induced air gas water heater

Technical field

The disclosure relates to energy-conservation induced air gas water heater.More specifically, the disclosure relates in a kind of outlet that is installed in air blast or the energy-conservation air door at the place, top of flue.

Background technology

In the water heater that comprises air blast such as induced air gas water heater, when water heater was in the standby mode, waste heat and gas spilt by the outlet of air blast.When burner and air blast operation, it is necessary discharging burning gases.Yet, when air blast does not move and water heater when being in the standby mode, because from the hot-air loss of water heater storage tank, it is poor efficiency that waste heat discharges from water heater.

Thereby a kind of permission discharges burning gases at run duration, but prevents that during standby mode the device of waste heat loss from being useful.

Summary of the invention

I provide a kind of energy-conservation induced air gas water heater, and this water heater comprises: water tank; Flue, this flue and described water tank connect; Burner, this burner make the fuel combustion that produces combustion product, and described combustion product passes this flue; Air blast, this air blast receives the combustion product from flue outlet; Air door, this air door cover and expose the outlet of flue outlet or air blast in movable mode.When the operation of burner and/or air blast, this air door can be shown in an open position, and when burner and/or air blast did not move, this air door can be in the closed position.

Description of drawings

Fig. 1 is the schematic elevational view of section form, shows the details of exemplary hot hydrophone.

Fig. 2 is the schematic elevational view of section form, shows the details of another exemplary hot hydrophone.

Fig. 3 is the top view of the exemplary air door that can use with the water heater of type shown in Fig. 1 and Fig. 2.

Fig. 4 is the side view of the air door shown in Fig. 3, and wherein movable plate is shown as and is oriented in a plurality of positions.

Fig. 5 is the schematic top view of another exemplary air door.

Fig. 6 is the schematic side elevation of the air door in the closed position of Fig. 5.

Fig. 7 is the schematic side elevation of the air door that is shown in an open position shown in Fig. 5.

Fig. 8 is the schematic top view of another exemplary air door.

The specific embodiment

Will be understood that, below describe to be intended to relate to being selected for illustrated concrete structure example in the accompanying drawing, and except claims, below describing not is that intention limits or the restriction disclosure.

The disclosure relates to a kind of water heater such as induced air gas water heater, is used for allowing when the operation of air blast and burner burning gases to discharge and prevent to lose from the waste heat of heating water tank when being in standby mode when air blast and burner do not move from flue.

See figures.1.and.2, show exemplary hot hydrophone 100.Water heater 100 comprises the sheath 104 that surrounds water tank 106, the main burner 114 that is arranged in combustion chamber 115.Roughly vertically-oriented flue 110 passes the center of water tank 106, and this flue 110 can comprise that a series of deflector (not shown) are delivered to water in the water tank 106 with the heat that main burner 114 is produced.Water tank 106 preferably has siphon pressure (mains pressure) ability, and can keep the water that heated.Water tank 106 is preferred by foamed insulation material 108 insulation.Alternative insulating materials can comprise the fibrous insulant of glass fibre or other type etc.Fiberglass insulation 109 is surrounded the foot and the combustion chamber 115 of water tank 106.Possible is if desired, then can use heat-resisting foamed insulation material.Foam baffle 107 or other device separate foamed insulation material 108 and fiberglass insulation 109.

Main burner 114 is positioned at water tank 106 belows, and this main burner 114 for example uses such as the natural gas of LPG or other gas.Available other suitable fuel replaces.Main burner 114 burning gases and air mixture, and the combustion product of consequent heat may rise and pass flue 110 with the air of heating.

Combustion product is upward through, and flows out from sheath 104 tops via flue outlet 116 after this combustion product has carried out the heat transmission.Flue outlet 116 is vented in air blast/air persuader 120.Air blast 120 comprises fan 122, and these fan 122 inducing combustion products are upward through flue 110 and enter in the housing of air blast 120.These hot combustion products mix with the surrounding air of introducing in the air blast 120 by inlet 135.These two kinds of mixture of ingredients have reduced the temperature of combustion product and have allowed this mixture to discharge from exporting 125 to being enough to the temperature compatible with following material with low, and the not anti-very high temperature of described material as an example, for example is a pvc pipe.This allows to increase the flexibility when water heater 100 is installed.

See figures.1.and.2, show exemplary air door 200.The size and dimension of air door 200 is set to firm covering blower export 125, as shown in Figure 1.Alternately, the size and dimension of air door 200 is set to firm covering flue outlet 116, as shown in Figure 2.

Air door 200 has open position and closed position.At open position, leave from water heater 100 via flue 110 such as gas and hot combustion product.When 120 operations of burner 114 and air blast and when just producing combustion product with the water in the heating storage tank 106, air door 200 is shown in an open position.In the closed position,, leave water heater 100 so prevented heat because air door 200 has been closed blower export 125 (Fig. 1) or flue outlet 116 (Fig. 2).When burner 114 and air blast 120 did not move and do not wish to have heat loss from storage tank 106, air door 200 was in the closed position.

Fig. 3 and Fig. 4 show typical or exemplary air door 300, and this air door 300 can be used as depicted in figs. 1 and 2 that a kind of structure of air door 200 uses.Air door 300 comprise framework 310, roughly flat and the circle dish or plate 320 and pivot member or sell 330.Framework 310 is attached to the outlet 125 of air blast 120 or the outlet 116 of flue 110.The material that depends on framework 310, this connection can realize by any device.For example, if 310 be such as with the metal of flue 110 same metal types, then framework 310 can or be fixed to outlet 116 by any other known method spot welding that material is fixed together.

Framework 310 can be positioned at outlet 116 fully or also can be connected to outlet 116 at angled sides 340 places, the size and dimension of described angled sides 340 is set to and exports 116 complementary sized and shape and is complementary, to help the easy connection between two devices.

Movable plate 320 is connected to pivot member 330, and can move between the closed position of approximate horizontal and roughly vertical open position, as by shown in the range of movement of the indication of the arrow A among Fig. 4.Preferably will coil 320 size and be set at and have the external diameter slightly littler, as by shown in the gap of the indication of the arrow B place among Fig. 4 than the internal diameter of framework 310.The various structures of this permission such as framework 310 and dish 320 are according to the expansion and the contraction of heating and cooling condition, and permission moving freely fully along the scope of being indicated by the arrow A of Fig. 4.Movable plate 320 also should be made by the heat proof material such as metal.Although framework 310 and dish 320 are illustrated as circular, also can use other shape as one sees fit.

With reference to Fig. 5 to 7, show another exemplary air door 400.The size and dimension of air door 400 is set to firm covering blower export 125 or flue outlet 116.Similar to exemplary air door 300, air door 400 has combustion product and leaves the open position of water heater 100 and the closed position when water heater is in standby mode.

Air door 400 comprises framework 410, a plurality of air flap 420 and support frame 430.Air door 400 has the outlet 116 of the circular of being fixed to or the framework 410 of 125 circular.Four air flaps 320 are connected to framework 410, and by such as the softness of thermoplastic elastomer but heat-resisting material make.Flexible air flap 420 remains in the closed position by support frame 430, and this support frame 430 comprises formation " cross " or " X " shape in essence and is connected the supporting member of framework 410 inside.When water heater was in standby mode, support frame 430 allowed four air flaps in the closed position.This illustrates in Fig. 6 particularly well.

Fig. 7 shows owing to from exporting 125 or export 116 and induce air and combustion product from exporting 125 or export 116 through being displaced to the more air flap 420 of vertical position.No matter water heater still is in the standby mode in operation, and support frame 430 all remains in constant position.

Fig. 8 shows the top view of another air door 500 similar to the air door 400 of Fig. 5.Yet air door 500 has six air flaps 520 and holds the respective support framework 530 of two additional damper sheets, rather than four air flaps 420.Air door 500 moves in the mode similar to air door 400 basically.Can use the air flap that substitutes quantity as required.

Water heater 100 can be in running status or be in standby mode.When the water temperature in the water tank 106 drops to the temperature levels of preliminary election when following, controller 130 starts air blasts 120 and passes 110 flow with induced air via combustion chamber 115, and this combustion chamber 115 has air inlet usually so that surrounding air is sucked in the combustion chamber 115.Then, receiving after air successfully moves through the signal of water heater 100, controller 130 starts burners 114.Burner 114 produces combustion product, and described combustion product is upward through flue 110 and breaks away from flue 110 to outlet 116.These burning gases with mix by inlet 135 environment intake air, they combine with combustion product and leave by blower export 125 then.

When the water temperature in the case 106 is approximate again when reaching preselected temperature, this controller stops the operation of burner 114 and stops the operation of air blast 120 usually after this soon.

During the standby mode when burner 114 does not move, there be not inducing by flue 110 to combustion product and air.Yet, because " opening " feature of water heater 100, wherein surrounding air can enter combustion chamber 115, and at 104 places, top of water heater 100 opening is arranged usually, so this surrounding air will be tending towards entering combustion chamber 115, pass flue 110 and in outlet 116 with export 125 places and escape to the outside.This causes the efficient that makes water heater to reduce passing through of 7% more than cooling air.This is undesirable.

As shown in Figure 1, will place outlet 125 places to prevent that surrounding air from entering this of water heater 100 and flowing naturally such as the air door of air door 200, otherwise this mobile naturally cooling air that will make pass flue 110 and reduce energy efficiency.The existence of air door 200 has prevented that substantially cooling this of air from flowing freely, and heat is remained in the water tank 110, thereby as shown in following example and comparative example, energy efficiency is improved 7% more than.

Water tank volume, measured value/rated value: 47.8/50.00

Example

Summary	Measured value	The Gama minimum of a value of tabulating
			Organic efficiency	??0.89

Summary	Measured value	The Gama minimum of a value of tabulating
			Energy factor	??0.700	??0.58
The supply of first hour	??0.00

The simulation use test

Modifying factor/calorific value (only gas)	??0.9489/1044.68
		Total gallonage that test period sucks	??64.43
The gallonage that first cycle period sucked	??10.73
		The outlet water temperature of first circulation deducts inlet water temperature (degrees Fahrenheit)	??83.68
Outlet water temperature during all suck deducts the mean value (degrees Fahrenheit) of inlet water temperature	??82.70
		The gross energy (Btu) that uses during 24 hours the simulation use test	??62274.73
Reclaim the energy (Btu) that test period (first circulation) consumes	??8702.36
		The energy (Btu) that after the suction/recovery period, consumes	??3443.40

Initial first circulation is final after reclaiming

Average water tank temperature (degrees Fahrenheit)

??136.08

??136.84

??136.61

??129.50

From Tmax to 24 hour time of suction/recovery last time (hour)	??18.50
		Total standby time (hour)	??23.69
Average ambient temperature between all standby period (degrees Fahrenheit)	??68.40
		Average water tank temperature (degrees Fahrenheit) between all standby period	??132.00
From Tmax to 24 hour average ambient temperature of suction/recovery last time (degrees Fahrenheit)	??68.33
		From Tmax to 24 hour average water tank temperature (degrees Fahrenheit) of suction/recovery last time	??133.23

First hour suction test

Average outlet temperature (degrees Fahrenheit)	??0
		Average inlet temperature (degrees Fahrenheit)	??0
The water (gallon) that test period sucks	??0
		The test always consuming time (minute)	??0

Calculated value

Water tank volume, measured value/rated value: 47.8/50.00

Comparative example

Summary	Measured value	The Gama minimum of a value of tabulating
			Organic efficiency	??0.87
Energy factor	??0.657	??0.58
			The supply of first hour	??0.00

The simulation use test

Modifying factor/calorific value (only gas)	??0.9415/1043.68
		Total gallonage that test period sucks	??64.54
The gallonage that first cycle period sucked	??10.75

Modifying factor/calorific value (only gas)	??0.9415/1043.68
		The outlet water temperature of first circulation deducts inlet water temperature (degrees Fahrenheit)	??82.48
Outlet water temperature during all suck deducts the mean value (degrees Fahrenheit) of inlet water temperature	??85.90
		The gross energy (Btu) that uses during 24 hours the simulation use test	??72946.09
Reclaim the energy (Btu) that test period (first circulation) consumes	??9809.46
		The energy (Btu) that after suction/payoff period, consumes	??8112.64

Initial first circulation is final after reclaiming

Average water tank temperature (degrees Fahrenheit)

??137.86

??140.70

??142.17

??139.95

From Tmax to 24 hour time of suction/recovery last time (hour)	??18.50
		Total standby time (hour)	??23.64
Average ambient temperature between all standby period (degrees Fahrenheit)	??68.54
		Average water tank temperature (degrees Fahrenheit) between all standby period	??137.01
From Tmax to 24 hour average ambient temperature of suction/recovery last time (degrees Fahrenheit)	??68.4
		From Tmax to 24 hour average water tank temperature (degrees Fahrenheit) of suction/recovery last time	??139.46

First hour suction test

Average outlet temperature (degrees Fahrenheit)	??0
		Average inlet temperature (degrees Fahrenheit)	??0
The water (gallon) that test period sucks	??0
		The test always consuming time (minute)	??0

Calculated value

On the other hand, when burner 114 operations and generation combustion product, this combustion product must be removed from system effectively.Therefore, air door 200 provides a kind of permission to remove these combustion products, but still keeps the simple of this system closing and effective and efficient manner when burner 114 does not move.

Although illustrate and described concrete structure and step at this for the purpose that illustrates with illustration, but those of ordinary skills are to be understood that, under the situation of the scope that does not depart from claims, concrete structure and step shown and that describe can substitute with various embodiments alternative and/or that be equal to.Disclosure intention covers the structure of this place discussion and any modification or the distortion of step.

Claims (10)

1. energy-conservation induced air gas water heater, this water heater comprises:

Water tank;

Flue, this flue connects mutually with described water tank;

Burner, this burner produces combustion product, and this combustion product passes described flue;

Air blast, this air blast have the blower export of reception from the described combustion product of flue outlet;

Air door, this air door covers in movable mode and exposes described flue outlet or described blower export, when described air blast and/or burner operation, described air door is in the position of opening substantially, and when described air blast and/or burner did not move, described air door was in the position of closing substantially.

2. water heater according to claim 1, wherein said air door comprises:

Framework, the size and dimension of this framework are set to and are attached to described blower export or described flue outlet securely;

Movable cover, this movable cover are fixed in the described framework, to cover described blower export or described flue outlet;

Pivot member, this pivot member is connected to described framework with described movable cover, and allows the movable plate motion;

When described air blast and the operation of described burner, described air door is shown in an open position, make described combustion product leave described water heater, described movable cover to be owing to flowing of air-flow and/or described combustion product moved, thereby exposes described blower export or described flue outlet; And

When described air blast and described burner did not move, described air door was in the closed position, and heat is retained in described flue and the described water tank, described movable cover covers described blower export or described flue outlet.

3. water heater according to claim 1, wherein said movable cover by gravitational motion in order to cover the position of described blower export or described flue outlet.

4. water heater according to claim 1, wherein said framework and movable plate are metals.

5. water heater according to claim 1, wherein said air door is made of heat proof material.

6. water heater according to claim 1, wherein said flue are directed substantially vertically and pass the center of described water tank substantially, and described air blast is positioned at described flue outlet top and surrounds described flue outlet.

7. water heater according to claim 1, wherein said air door comprises:

Framework, the size and dimension of this framework are set to and are attached to described blower export or final outlet securely;

A plurality of air flaps, the size and dimension of described a plurality of air flaps are set at jointly covers described blower export or described flue outlet, and each air flap is attached to described framework at the edge part place;

When described air blast and the operation of described burner, described air door is shown in an open position, make described combustion product leave described water heater, described a plurality of air flaps to be owing to flowing of air-flow and/or described combustion product moves upward, thereby expose described blower export or described flue outlet; And

When described air blast and described burner did not move, described air door was in the closed position, and heat is retained in described flue and the water tank, described a plurality of air flaps cover described blower export or described flue outlet.

8. air door according to claim 7, wherein said a plurality of air flaps by gravitational motion in order to cover the position of described blower export or described flue outlet.

9. air door according to claim 7, wherein said a plurality of air flaps are made of elastomeric material.

10. air door according to claim 7, wherein said air door is made of heat proof material.

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