CN102128556A - A furnace header box having blocked condensation protection, a furnace including the header box and a blocked condensation protection system - Google Patents
A furnace header box having blocked condensation protection, a furnace including the header box and a blocked condensation protection system Download PDFInfo
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- CN102128556A CN102128556A CN2010105949630A CN201010594963A CN102128556A CN 102128556 A CN102128556 A CN 102128556A CN 2010105949630 A CN2010105949630 A CN 2010105949630A CN 201010594963 A CN201010594963 A CN 201010594963A CN 102128556 A CN102128556 A CN 102128556A
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- pressure
- passage
- header box
- inlet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
- F24H8/006—Means for removing condensate from the heater
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/06—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators
- F24H3/08—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes
- F24H3/087—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes using fluid fuel
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Feeding And Controlling Fuel (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
A header box, a furnace and a blocked condensation protection system are disclosed herein. In one embodiment, the header box includes: (1) a first channel having a first channel supply port positioned to be in fluid communication with an inlet of a combustion air blower and a first pressure port couplable to a first input of a pressure sensing device, the combustion air blower and the pressure sensing device associated with the cold end header box and (2) a second channel having a second channel supply port positioned to be in fluid communication with the inlet of the combustion air blower, a second pressure port couplable to a second input of the pressure sensing device and a pressure reference inlet, the second channel in fluid communication with the first channel and configured to have about a same pressure as the first channel when the pressure reference inlet is blocked.
Description
Cross reference to related application
It is No.61/295 by the title that people such as Shailesh S.Manohar propose for " An Improved Heating Furnace for a HVAC System ", sequence number that the application requires on January 15th, 2010,501 U.S. Provisional Application No., the full content of this application is incorporated herein by reference.
Technical field
Generally speaking, the application relates to stove, more specifically, relates to the protection stove and prevents that condensation from gathering.
Background technology
The HVAC system can be used for regulating the environment in the enclosure.Usually, use air blast to come air to be absorbed the HVAC system from enclosure, and afterwards, air is back in the enclosure by other pipeline at adjusting air (for example) with air heat or cooling by pipeline.For example, can use the stove such as gas burner to come air is heated.
Efficient dwelling house gas-fired equipment depends on the mechanical device such as the combustion air persuader usually, produces the in check mass flow by the flue side of equipment heat exchanger.For producing stream, there is pressure reduction in the heat unit that must stride stove.For verifying realization and having kept suitable pressure drop and mobile combustion process, common working pressure sensing device with support stove in margin of safety.These pressure sensor devices can comprise mechanical differential pressure sensing device (as pressure switch) or the electronic sensor that feedback is provided to the integrated electronic controller.
Be similar between this furnace design manufacturer in industry, and the common flue gas/drip pocket case (the application is called cold junction header box (CEHB)) that uses the end that is attached to condenser coil, combustion air persuader fan component (CAI), the fixing hole of the flow of heat unit is flow through in the adjusting that is arranged in CAI or CEHB, and the pressure sensor device of monitoring flow.Can the working pressure sensing device monitor and stride fixing hole, or the pressure of other points in the heat unit, so that being provided, best signal provision uses.
Summary of the invention
On the one hand, the invention provides CEHB.In one embodiment, CEHB comprises: (1) has the first passage of first pressure port of the first input end that is oriented to the first passage supply opening that is communicated with the inlet fluid of combustion air air blast and can be coupled to pressure sensor device, and described combustion air air blast and described pressure sensor device are associated with described cold junction header box; And (2) have the second channel supply opening that is oriented to be communicated with the described inlet fluid of described combustion air air blast, second pressure port of second input that can be coupled to described pressure sensor device and the second channel that pressure is quoted inlet, described second channel is communicated with described first passage fluid, and is configured to quote inlet when described pressure and has about identical pressure with described first passage when getting clogged.
On the other hand, a kind of stove is disclosed.In one embodiment, stove comprises: (1) heat exchanger, (2) be configured to generate combustion air persuader by the air-flow of heat exchanger, (3) be configured to monitor pressure sensor device by the combustion pressure of heat exchanger, and (4) are configured to be coupling in the header box between heat exchanger and the combustion air persuader, this header box has: (4A) has and is oriented to the first passage supply opening that is communicated with the inlet fluid of combustion air air blast, and the negative pressure passage of negative pressure mouth that can be coupled to the negative input end of pressure sensor device; And (4B) have the normal pressure passage supply opening that is oriented to be communicated with the inlet fluid of combustion air air blast, the normal pressure mouth of the positive input terminal that can be coupled to pressure sensor device and the normal pressure passage that pressure is quoted inlet, the normal pressure passage is communicated with negative pressure passage fluid, and is configured to quote inlet when pressure and has about identical pressure with the negative pressure passage when getting clogged.
Aspect another, a kind of anti-blocking condensation protection system that is used for stove is disclosed.In one embodiment; anti-condensation is blocked protection system and comprised: (1) is configured to monitor the pressure sensor device by the combustion pressure of the heat exchanger of stove; and (2) are configured to be coupling in the heat exchanger of stove and the header box between the combustion air persuader; this header box has: the first passage that (2A) has first pressure port of first passage supply opening that the inlet fluid of the combustion air air blast that is oriented to and is associated with stove is communicated with and the first input end that can be coupled to pressure sensor device; and (2B) have and be oriented to the second channel supply opening that is communicated with the inlet fluid of combustion air air blast; can be coupled to second pressure port of second input of pressure sensor device and the second channel that pressure is quoted inlet; second channel is communicated with the first passage fluid; and be configured to quote inlet when pressure and have approximately identical pressure with first passage when getting clogged, pressure sensor device is configured to be approximately the fuel supply of closing when zero heat exchanger when the pressure reduction between judgement first passage and the second channel.
Description of drawings
Referring now in connection with the description of the various drawing figures following, wherein:
Fig. 1 is the exploded isometric view of a part of embodiment of the stove of constructed according to the principles of the present invention;
Fig. 2 is the front isometric view of embodiment of the CEHB of constructed according to the principles of the present invention;
Fig. 3 is the back isometric view of the CEHB of Fig. 2;
Fig. 4 is the function view of embodiment of the CEHB of constructed according to the principles of the present invention, shows the normal running when CEHB is in flat prone position attitude;
Fig. 5 shows the function view of the CEHB among the blocked Fig. 4 of drainage path;
Fig. 6 is the function view of embodiment of the CEHB of constructed according to the principles of the present invention, shows the normal running when CEHB is in upright posture;
Fig. 7 shows the function view of the CEHB among the blocked Fig. 6 of drainage path; And
Fig. 8 is the block diagram of embodiment of the anti-clogging condensation protection system of constructed according to the principles of the present invention.
The specific embodiment
Along with air flows through the heat unit of stove, will produce condensation, condensation accumulates among the CEHB usually.Be the accumulation and the protection watch-dog that prevent condensation, for example, pressure sensor device need suitably be discharged condensation from CEHB.When the stove of routine when different attitudes are used; conventional stove asks a plurality of pressure sensor devices or requirement to reappose pressure sensor device possibly; so that it is long-pending normally to respond to water-water reactor under the blocked situation of drainpipe, and the protection sensing device is avoided the damage of condensation.In addition, when stove is installed as different attitude, also the flexible pipe that is used for draining or is used for induction pressure may must be reapposed.
The invention provides and comprise header box with integrated anti-clogging condensation protection.No matter stove is to install with upright posture or with flat prone position attitude, and the application is disclosed to be a kind of like this anti-clogging condensation protection system, and this system is configured to close the fuel that enters stove when inserting condensate drainage pipe, ventilation or air inlet.Replace disclosed requirement to be used to monitor the stove of a plurality of switches (checking is by the suitable flow of heat exchanger) of combustion pressure, can use the disclosed single pressure sensor device of the application to monitor combustion pressure and prevent that condensate drainage pipe is blocked.Different with conventional stove, when when different attitudes are used, disclosed stove does not need to reappose switch or any force pipe is changed its course.
In one embodiment, header box is the CEHB of gas burner.CEHB is positioned between the secondary unit and combustion air persuader of gas burner.Disclosed CEHB comprises the size and the passage of location-appropriate so that fluid is communicated with, and when the condensate drainage pipe upset operation (for example, condensation is blocked) acquisition pressure much at one.So, the pressure sensor device that is coupled to the pressure port in the passage detects zero between the passage or is approximately zero pressure reduction, and closes the fuel supply to stove.Because the configuration of passage, the present invention advantageously uses single pressure sensor device to monitor combustion pressure and the blocked situation of drainpipe.Advantageously, can reduce the quantity of required usually safe pressure switch.
Turn to Fig. 1 now, shown in be the exploded isometric view of a part of embodiment of the stove 100 of constructed according to the principles of the present invention.Stove 100 can be colourful attitude stove.In certain embodiments, stove can be the dwelling house gas burner.Stove 100 comprises anti-condensation wherein integrated and stops up the embodiment of the header box of protection.Stove 100 comprises shell 110, and this shell 110 has front openings 112, in this front openings 112, has settled installing rack 114.Have opening 116 on the installing rack 114, and at opening 116 upper support heat exchanger assemblies 120.Heat exchanger assemblies 120 comprises main heat exchanger 122 and secondary unit 126.Main heat exchanger 122 comprises six heat exchangers coupled to each other of delegation (being expressed as 124).Heat exchanger generally is a coil pipe, and have three roughly 180 ° folding, so that heat exchanger is crossed over four times on opening 116, and in (main heat exchanger 122) mouth 125 and (secondary unit 126) outlet 127, finish, inlet 125 and outlet 127 generally are coplanar mutually, and towards the opening 112 of shell 110.The alternative embodiment of heat exchanger assemblies 120 can have at delegation or multirow more or fewer heat exchangers coupled to each other.In addition, alternative embodiment can have the heat exchanger arrangement of replacement.
Burner assembly 140 comprises the solenoid valve of controlling in the thermostatics mode 142, from valve 142, and stride the arm 144 that burner assembly 140 extends, be coupled to one or more gas port (not shown) of arm 144, and corresponding with gas port and be positioned near the gas port one or more burner (not shown).The shown embodiment of burner assembly 140 has six burners of delegation.The alternative embodiment of burner assembly 140 can have and is arranged in more in delegation or the multirow or fewer burner.Combustion air intake 146 allows for burner assembly 140 air feed.In assembled configuration, burner assembly 140 is positioned near the heat exchanger assemblies 120, so that its burner roughly aligns with inlet 125.
Stove 100 also comprises exhaust persuader assembly 150, wherein has combustion air persuader 154 and is coupled to the flue collar 156 of the outlet of combustion air persuader 154.In assembled configuration, exhaust persuader assembly 150 be positioned at heat exchanger assemblies 120 near, so that the flue collar 156 roughly aligns with flue pipe 148 (not shown), flue pipe 148 is with undesirable gas (i.e. Ran Shao gaseous products) diversion stove 100.Have first drain hose and second drain hose 151,152 to be associated with exhaust persuader assembly 150, they provide from the path of flue pipe 148 and the 156 discharge flue condensations of the flue collar.
Air blast 160 is suspended from shelf 114, so that its outlet (no Reference numeral) is roughly alignd with opening 116.Electronic controller 170 be positioned at air blast 160 near, and be configured to control air blast, valve 142 and combustion air persuader 154, provide heat to cause stove.Can above the front openings 112 of shell 110, lid 180 be set.
CEHB 190 provides interface between combustion air persuader 154 and secondary unit 126.Combustion air persuader 154 has the inlet that is coupled to CEHB 190.In assembled configuration, exhaust persuader assembly 150 be positioned at heat exchanger assemblies 120 near so that CEHB190 roughly 127 aligns with outlet, and the flue collar 156 roughly aligns with flue.
Stove 100 also comprises the pressure sensor device 195 that is configured to monitor by the heat unit of stove 100 combustion pressure.Pressure sensor device 195 can be mechanical differential pressure sensing device (as pressure switch) or electronic sensor, and they provide feedback to the integrated electronic controller of the stove such as electronic controller 170 100.Pressure sensor device 195 comprises the input that is used for determining combustion pressure.The input of pressure sensor device 195 is coupled to the pressure port of CEHB190.As discussed below, by being set in the passage of CEHB 190, pressure port protect pressure port to avoid the water pollution.
Based on the pressure reduction that is obtained from the data that receive via pressure port by pressure sensor device 195, when unsuitable air flow through the heat unit, the gas supply of heat exchanger 120 can be closed or be kept closing.In addition, when the condensate drainage pipe of CEHB 190 damaged or stops up, the gas supply of heat exchanger 120 can be closed or be kept closing.So, use can protect stove 100 not make unsuitable air flow through the heat unit from the same pressure sensor device 195 of the data of the pressure port of CEHB190, and protection stove 100 avoids producing the blocked situation of condensate drainage pipe.Pressure sensor device 195 can be fixed to the mouth of CEHB190 by conventional flexible pipe.Pressure sensor device 195 also can be coupled to electronic controller 170 or valve 142 by conventional method.In certain embodiments, pressure sensor device 195 can be fixed on the CEHB 190.
In shown embodiment, controller 170 is opened combustion air persuader 154 with startup exhaust in heat exchanger (comprising heat exchanger 124), and removes potential harmful unburned or burning gases.Then, valve 142 opened by controller 170 so that gas enters arm 144, and one or more gas port, so gas begins to mix to form elementary combustion air with air.Then, controller 170 activates the igniter (not shown in figure 1) to attempt to light elementary combustion air.If showing elementary combustion air, the output of flame rectification circuit do not light in the section at the fixed time, controller 170 valve-offs 142 then, and attempt by the time to start once more.Light in the section at the fixed time if the output of flame rectification circuit shows elementary combustion air, then controller 170 activates air blast 160, and this air blast 160 forces air to make progress away by opening 116 and heat exchanger assemblies 120.When it during by heat exchanger surperficial, air is heated, so carrying as required or dividing to be equipped with provides heat.
Fig. 2 is the front isometric view of embodiment of the CEHB such as CEHB 190 of constructed according to the principles of the present invention.As noted above, CEHB 190 is configured to provide an interface between secondary unit 126 and the combustion air persuader 154 by heat exchanger 120 suction combustion airs.
CEHB 190 is configured to be provided for outlet that the gas of heating is emitted via secondary unit 126 from heat exchanger.CEHB 190 also is configured to remove the condensation that is associated with the gas that heats.So, CEHB 190 is usually by the resistive nonmetallic materials of aqueous corrosion are constituted.CEHB 190, for example, can be made of plastics.
CEHB 190 can be used for the colourful attitude gas burner such as stove 100.Therefore, CEHB 190 comprises the assembly of colourful attitude drainage system, and this drainage system comprises first scavenge port 210, second scavenge port 212, left bank water pipe 214 and right drainpipe 216.Be provided with first and second scavenge ports 210,212, they are configured to be coupled to drain hose such as drain hose 151,152 and so on from the flue collar 156.Depend on the installation of stove 100, can use left bank water pipe 214, right drainpipe 216 or both to come from CEHB 190, to remove condensation.
Have flange 220 to be positioned at the four sides of CEHB 190, this flange 220 is configured to CEHB 190 is attached to secondary unit 126.Flange 220 comprises the hole, has expressed hole 222, is used for mechanically CEHB 190 being attached to secondary unit 126.Between flange 220 and secondary unit 126, use liner usually.
CEHB 190 also comprises the support collar 230 that is used for combustion air persuader 154 is coupled to CEHB 190.Therefore, it is corresponding with the inlet of combustion air air blast 154 to support the collar 230, is used for sucking air by heat exchanger 120.Support the collar 230 and help by this way to support combustion air persuader 154,, comparatively speaking, be installed to four bolts of 190 needs of CEHB in a conventional manner so that persuader 154 is only required two bolts.Liner represented among Fig. 1 uses with supporting the collar 230 usually, is used for CEHB 190 is coupled to combustion air air blast 154.
In the circumference that supports the collar 230, fixing hole 240 is arranged, (therefore, also in the inlet of combustion air air blast 154).Fixing hole 240 is configured to regulate the air-flow by heat exchanger 120.The size of fixing hole 240 can be based on the input size of stove 100.In the circumference that supports the collar 230, also have negative passage supply opening 244 and positive passage supply opening 246.In these holes in the front of CEHB190 each all is provided for the opening to corresponding passage supply air.Can determine the size and the position of fixing hole 240, negative passage supply opening 244, positive passage supply opening 246 by empirical test, and positive and negative pressure channel 270,280 size and position (shown in Fig. 3), so that goal pressure or the pressure limit that is detected by pressure sensor device to be provided, be used for determining combustion pressure.The advantage of such layout of CEHB 190 is, a common pressure switch such as pressure sensor device 195 can be used for the various input sizes of stove, and the pressure signal that is suitable for gas-air gaseous mixture amplification air valve is provided, regulate to allow input rate.
CEHB 190 also comprises connected system 235, and this connected system 235 has the aligning protuberance, as represented among Fig. 2, is used for pressure sensor device 195 is coupled to CEHB 190.The type or the model that depend on the pressure sensor device 195 that is attached to CEHB 190, connected system 235 and corresponding protuberance can be different.
CEHB 190 also comprises normal pressure mouth 250 and negative pressure mouth 260, and they are coupled to the positive input terminal and the negative input end of the pressure sensor device such as pressure sensor device 195.Pressure sensor device is configured to based on monitoring the combustion pressure of striding fixing hole 240 via positive/negative pressure mouth 250,260 in the data that negative input port and forward transportation inlet receive.Positive and negative pressure port 250,260 is coupled to pressure sensor device via the pressure sensor device flexible pipe usually.Normal pressure mouth 250 is positioned at normal pressure passage 270, and negative pressure mouth 260 is positioned at negative pressure passage 280, as shown in Figure 3.Normal pressure mouth 250 and negative pressure mouth 260 placed in the corresponding passage and, can protect pressure port and pressure sensor device to avoid the infringement of condensation away from the opening of corresponding passage.
CEHB 190 also comprises spiral base handle 292 and mine dam 295.When the combustion air persuader is installed to CEHB 190, use spiral base handle 292.Mine dam 295 is condensed water baffle plates, and it is configured to guide the sensitizing range of water away from CEHB 190, and helps the pressure signal safeguard stability.
Fig. 3 shows the back isometric view of the CEHB 190 of normal pressure passage 270 and negative pressure passage 280.Although it is invisible in Fig. 3,, normal pressure passage 270 comprises normal pressure mouth 250.In course of normal operation, normal pressure passage 270 has pressure identical or much at one with CEHB 190 (that is, in the main chamber of CEHB 190).So, normal pressure mouth 250 is placed in the normal pressure passage 270, can measure combustion pressure, protect normal pressure mouth 250 to avoid the infringement of condensation simultaneously.Other assemblies of (or among Fig. 2) sightless normal pressure passage 270 and negative pressure passage 280 comprise negative passage supply opening 244, positive passage supply opening 246 in Fig. 3, and the flow restriction hole that is positioned at normal pressure passage 270.In addition, negative pressure passage 280 is included in sightless blow vent among Fig. 2 or Fig. 3.The pressure that blow vent is configured to receive by negative passage supply opening 244 is reduced in the target zone that negative pressure mouth 260 is measured.Figure 4 illustrates blow vent.Can determine passage 270,280 by empirical test, with and size, configuration and the position of various assemblies, providing by detected goal pressure of pressure sensor device or pressure limit, with interrelated to target pressure drop or the flow by heat exchanger.
First end of normal pressure passage 270, arrival end 272 extends in supporting the collar 230, as shown in Figure 4.Second end of normal pressure passage 270, pressure are quoted inlet 274, open towards the side with first drainpipe and second drainpipe 214,216 of CEHB190.Pressure is set quotes inlet 274, make the condensate of in CEHB 190, assembling to cause the pressure change in the normal pressure passage 270 when reaching undesirable level.By this variation of pressure sensor device 195 monitorings, will allow stove to close safely in response to this variation.Normal pressure passage 270 has the quadrangle section, and comprises four parts that engage with 90 degree or about 90 degree, to form the continuous open channel of quoting inlet 274 from arrival end 272 to pressure.
Although it is invisible in Fig. 3,, negative pressure passage 280 comprises negative pressure mouth 260.Negative pressure passage 280 is configured to the high negative pressure power of the porch existence of combustion air persuader 154 is reduced to the goal pressure or the pressure limit at negative pressure mouth 260 places.So, negative pressure mouth 260 is placed in the negative pressure passage 280, can measure combustion pressure signal, protect negative pressure mouth 260 to avoid the infringement of condensation simultaneously.Negative pressure passage 280 comprises first end that is represented as blind end 282.Second end of negative pressure passage 280, openend 284 is opened towards the side with first drainpipe and second drainpipe 214,216 of CEHB 190.Openend 284 is set, makes the condensate of in CEHB 190, assembling to cause the pressure change in the negative pressure passage 280 when reaching undesirable level.By this variation of pressure sensor device 195 monitorings, will allow stove to close safely in response to this variation.Negative pressure passage 280 has the quadrangle section, and comprises four parts of joint, to form from blind end 282 to openend 284 continuous open channel.
Be positioned at negative pressure passage 280 supply section 286 be negative passage supply opening 244.A part that comprises the supply section 286 of negative passage supply opening 244 is placed in the circumference that supports the collar 230, therefore, and in the inlet of the correspondence of combustion air persuader 154.Shape around the face of the negative pressure passage 280 of openend 284 can provide water shielding, avoids polluting with protection negative pressure mouth 260.
Negative passage supply opening 244 is oriented to carry out fluid with the inlet of combustion air persuader and is communicated with.Negative pressure mouth 260 in the negative pressure passage 280 can be coupled to the input such as negative input end of pressure sensor device.Similarly, normal pressure passage supply opening 246 is oriented to carry out fluid with the inlet of combustion air air blast and is communicated with, and normal pressure mouth 250 can be coupled to the input such as positive input terminal of pressure sensor device.Normal pressure passage 270 and negative pressure passage 280 carry out fluid and are communicated with, and are configured to quote inlet 274 when blocked (for example, be condensed obstruction) when pressure and have about identical pressure.CEHB 190 is so designed, and wherein, even also is correct comprising that CEHB 190 is installed to be under the situation of a plurality of attitudes.In the operating process of quoting inlet 274 when pressure and do not have combustion air air blast when blocked (, in the course of normal operation as suitable drainpipe the time), normal pressure passage 270 is configured to compare with negative pressure passage 280 and has normal pressure.
Fig. 4 is the function view of an Embodiment C EHB 190 of the CEHB of constructed according to the principles of the present invention, shows when CEHB 190 is in flat prone position attitude the normal running of (, comprise that the stove of CEHB190 is installed to be the upper reaches attitude).Fig. 4 provides the section of CEHB 190, with the operation of the positive and negative passage 270,280 in the inlet that clearly show that combustion air persuader 154.Except that the mentioned assembly in the front of CEHB 190, Fig. 4 also shows the flow restriction hole 450 of the blow vent 440 and the normal pressure passage 270 of negative pressure passage 280.
In course of normal operation, condensation accumulate in CEHB 190 below, when CEHB 190 is level, CEHB 190 be connected to left side drainpipe 214 and right side drainpipe 216 both.Left side drainpipe 214 and right side drainpipe 216 boths can provide drainage path for condensation.In certain embodiments, can only use in the drainpipe 214,216, and deliberately insert untapped drainpipe.
Although provide unimpeded drainage path to be used to discharge condensation,, pressure is quoted inlet 274 mediations that are condensed, and the pressure in the normal pressure passage 270 is represented the pressure among the CHEB 190.So, the pressure reduction that exists between negative pressure passage 280 and normal pressure passage 270 is held.
When condensation during not from CEHB 190 discharging, condensation is gathered and retaining pressure is quoted inlet 274, as shown in Figure 5.Therefore, the pressure in the normal pressure passage 270 based on the input from normal pressure supply opening 430, becomes more negative.So, the pressure reduction between normal pressure passage 270 and the negative pressure passage 280 is driven to zero or approximately zero.In response, be coupled to the gas that negative and the pressure sensor device such as pressure sensor device 195 of positive supply opening 260,250 can be closed to heat exchanger 120.
In Fig. 6 and Fig. 7 similar operation has been shown, wherein, CEHB 190 is in upright posture (that is, the stove that has a CEHB 190 is in level left side or horizontal right side attitude).As shown in Figure 6 and Figure 7, by following be that the pressure that is coupled to single drainpipe (that is, the right side drainpipe 216) is quoted near the faces the inlet 274 now.Fig. 6 represents suitable drainpipe, and Fig. 7 shows the blocked situation of condensate drainage pipe.
Fig. 8 is the block diagram of embodiment of the anti-clogging condensation protection system 800 of constructed according to the principles of the present invention.Anti-clogging condensation protection system 800 comprises pressure sensor device 810 and header box 820.Anti-clogging condensation protection system 800 is configured in the stove such as the stove 100 of Fig. 1.Pressure sensor device 810 is configured to monitor the combustion pressure by the heat exchanger of stove.Pressure sensor device 810 can be the mechanical differential pressure sensing device such as pressure switch.Can be alternatively, pressure sensor device 810 can comprise the electronic sensor that feedback is provided to the integrated electronic controller.
It will be apparent to one skilled in the art that the application is related can be carried out other and further interpolation, deletion, substitutions and modifications to described embodiment.
Claims (10)
1. the cold junction header box of a stove comprises:
Have the first passage of first pressure port of the first input end that is oriented to the first passage supply opening that is communicated with the inlet fluid of combustion air air blast and can be coupled to pressure sensor device, described combustion air air blast and described pressure sensor device are associated with described cold junction header box; And
Second pressure port of second input that have the second channel supply opening that is oriented to be communicated with, can be coupled to described pressure sensor device and the second channel that pressure is quoted inlet with the described inlet fluid of described combustion air air blast, described second channel is communicated with described first passage fluid, and is configured to quote inlet when described pressure and has about identical pressure with described first passage when getting clogged.
2. cold junction header box as claimed in claim 1 also comprises the support collar that is used for described cold junction header box is coupled to described combustion air air blast, and wherein, the described support collar is corresponding with the described inlet of described combustion air persuader.
3. cold junction header box as claimed in claim 2, wherein, described first passage supply opening and described second channel supply opening are placed in the circumference of the described support collar.
4. cold junction header box as claimed in claim 1, wherein, described second channel is configured to when described pressure is quoted inlet and do not got clogged to compare with described first passage in the operating period of described combustion air air blast and has normal pressure.
5. cold junction header box as claimed in claim 1, wherein, described second channel and described first passage are configured to when described stove is in a plurality of installation attitude, quote inlet when described pressure and have approximately identical pressure when getting clogged.
6. cold junction header box as claimed in claim 1, also comprise two drainpipes that are configured to when described stove is installed as flat prone position attitude, condensation be discharged described cold junction header box, wherein, when being installed as upright posture, use by described stove in described two drainpipes one that described cold junction header box is discharged in condensation.
7. cold junction header box as claimed in claim 1, wherein, it is openend towards the described second channel of the one side of the described cold junction header box with two drainpipes that described pressure is quoted inlet.
8. stove comprises:
Heat exchanger;
Be configured to generate combustion air persuader by the air-flow of described heat exchanger;
Be configured to monitor pressure sensor device by the combustion pressure of described heat exchanger; And
Be configured to be coupling in the header box between described heat exchanger and the described combustion air persuader, described header box comprises:
Negative pressure passage with negative pressure mouth of the negative input end that is oriented to the first passage supply opening that is communicated with the inlet fluid of combustion air air blast and can be coupled to described pressure sensor device; And
The normal pressure mouth of the positive input terminal that have the normal pressure passage supply opening that is oriented to be communicated with, can be coupled to described pressure sensor device and the normal pressure passage that pressure is quoted inlet with the described inlet fluid of described combustion air air blast, described normal pressure passage is communicated with described negative pressure passage fluid, and is configured to quote inlet when described pressure and has about identical pressure with described negative pressure passage when getting clogged.
9. stove as claimed in claim 8, wherein, described pressure sensor device is configured to close when pressure reduction in detecting described negative pressure passage and described normal pressure passage is approximately zero the fuel supply to described heat exchanger.
10. anti-blocking condensation protection system that is used for stove comprises:
Be configured to monitor the pressure sensor device of the combustion pressure of the heat exchanger by described stove; And
Be configured to be coupling in the described heat exchanger of described stove and the header box between the combustion air persuader, described header box comprises:
Have be oriented to and the first passage of first pressure port of the first passage supply opening that is communicated with of the inlet fluid of the combustion air air blast that is associated of described stove and the first input end that can be coupled to described pressure sensor device; And
Have and be oriented to the second channel supply opening that is communicated with the described inlet fluid of described combustion air air blast, can be coupled to second pressure port of second input of described pressure sensor device and the second channel that pressure is quoted inlet, described second channel is communicated with described first passage fluid, and be configured to quote inlet when described pressure and have approximately identical pressure with described first passage when getting clogged, described pressure sensor device is configured to be approximately the fuel supply of closing when zero described heat exchanger when the pressure reduction between described first passage of judgement and the described second channel.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US29550110P | 2010-01-15 | 2010-01-15 | |
| US61/295,501 | 2010-01-15 | ||
| US12/834,391 US9429338B2 (en) | 2010-01-15 | 2010-07-12 | Furnace header box having blocked condensation protection, a furnace including the header box and a blocked condensation protection system |
| US12/834,391 | 2010-07-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102128556A true CN102128556A (en) | 2011-07-20 |
| CN102128556B CN102128556B (en) | 2014-12-17 |
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| CN201010594963.0A Active CN102128556B (en) | 2010-01-15 | 2010-12-20 | A furnace header box having blocked condensation protection, a furnace including the header box and a blocked condensation protection system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4309977A (en) * | 1980-05-12 | 1982-01-12 | Kitchen John A | Pulse combustion apparatus |
| US5749355A (en) * | 1996-08-27 | 1998-05-12 | Lennox Industries Inc. | Multi-position furnace with condensing heat exchanger |
| US20050126558A1 (en) * | 2003-12-10 | 2005-06-16 | Lennox Manufacturing Inc. | Multi-position furnace |
| US20080314375A1 (en) * | 2007-06-25 | 2008-12-25 | Johnson Controls Technology Company | Condensate pan with condensate trap |
| CN201203263Y (en) * | 2008-03-28 | 2009-03-04 | 宫树同 | Tube arranging type hot-air stove |
-
2010
- 2010-12-20 CN CN201010594963.0A patent/CN102128556B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4309977A (en) * | 1980-05-12 | 1982-01-12 | Kitchen John A | Pulse combustion apparatus |
| US5749355A (en) * | 1996-08-27 | 1998-05-12 | Lennox Industries Inc. | Multi-position furnace with condensing heat exchanger |
| US20050126558A1 (en) * | 2003-12-10 | 2005-06-16 | Lennox Manufacturing Inc. | Multi-position furnace |
| US20080314375A1 (en) * | 2007-06-25 | 2008-12-25 | Johnson Controls Technology Company | Condensate pan with condensate trap |
| CN201203263Y (en) * | 2008-03-28 | 2009-03-04 | 宫树同 | Tube arranging type hot-air stove |
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| CN102128556B (en) | 2014-12-17 |
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