CN102128556B - 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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- CN102128556B CN102128556B CN201010594963.0A CN201010594963A CN102128556B CN 102128556 B CN102128556 B CN 102128556B CN 201010594963 A CN201010594963 A CN 201010594963A CN 102128556 B CN102128556 B CN 102128556B
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- pressure
- passage
- combustion air
- header box
- sensor device
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Classifications
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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]
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
To the cross reference of related application
This application claims that the title proposed by the people such as Shailesh S.Manohar on January 15th, 2010 is " An Improved Heating Furnace for a HVAC System ", sequence number is No.61/295, the priority of the U.S. Provisional Application of 501, the full content of this application is incorporated herein by reference.
Technical field
Generally speaking, the application relates to stove, more specifically, relates to protection stove and prevents condensation accumulation.
Background technology
HVAC system can be used for regulating the environment in enclosure.Usually, use air blast, by pipeline, air is absorbed HVAC system from enclosure, and after adjustment air (such as, by air heat or cooling), by other pipeline, air is back in enclosure.Such as, the stove of such as gas burner and so on can be used to heat air.
Efficient house gas-fired equipment depends on the mechanical device of such as combustion air persuader and so on usually, produces the in check mass flow of the flue side by equipment heat exchanger.For producing stream, pressure reduction must be there is across the heat unit of stove.Realize for checking and maintain suitable pressure drop and flow with the combustion process supporting stove in margin of safety, usually using pressure sensor device.These pressure sensor devices can comprise the mechanical differential pressure sensor device (as pressure switch) from feedback to integral electronic controller or the electronic sensor that provide.
Similar between this furnace design manufacturer in industry, and usually use the flue gas/drip pocket case (the application is called cold junction header box (CEHB)) being attached to the end of condenser coil, combustion air persuader fan component (CAI), the fixing hole of the flow of heat unit is flow through in the adjustment being arranged in CAI or CEHB, and the pressure sensor device of monitoring flow.Pressure sensor device can be used monitor across fixing hole, or other pressure put in heat unit, use to provide best signal provision.
Summary of the invention
On the one hand, the invention provides CEHB.In one embodiment, CEHB comprises: (1) has the first passage of the first pressure port of the first passage supply opening being oriented to be communicated with the inlet fluid of combustion air blowers and the first input end that can be coupled to pressure sensor device, and described combustion air blowers and described pressure sensor device are associated with described cold junction header box; And (2) have the second channel that the second channel supply opening being oriented to be communicated with the described inlet fluid of described combustion air blowers, the second pressure port of second input that can be coupled to described pressure sensor device and pressure quote entrance, described second channel is communicated with described first passage fluid, and is configured to quote when entrance gets clogged when described pressure to have approximately identical pressure with described first passage.
On the other hand, a kind of stove is disclosed.In one embodiment, stove comprises: (1) heat exchanger, (2) be configured to generate the combustion air persuader by the air-flow of heat exchanger, (3) be configured to monitor the 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 combustion air persuader, this header box has: (4A) has the first passage supply opening being oriented to be communicated with the inlet fluid of combustion air blowers, and the negative pressure passage of negative pressure mouth of negative input end of pressure sensor device can be coupled to, and (4B) has the normal pressure passage that the normal pressure passage supply opening being oriented to be communicated with the inlet fluid of combustion air blowers, the normal pressure mouth of the positive input terminal that can be coupled to pressure sensor device and pressure quote entrance, normal pressure passage and negative pressure passage, and be configured to quote when entrance gets clogged when pressure, with negative pressure passage, there is approximately identical pressure.
In another, disclose a kind of anti-blocking condensation protection system for stove.In one embodiment, condensation protection system comprises: (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 header box between the heat exchanger of stove and combustion air persuader, this header box has: (2A) has the first passage of the first pressure port of the first passage supply opening that the inlet fluid that is oriented to the combustion air blowers be associated with same stove is communicated with and the first input end that can be coupled to pressure sensor device, and (2B) has the second channel supply opening being oriented to be communicated with the inlet fluid of combustion air blowers, the second channel that the second pressure port of the second input of pressure sensor device and pressure quote entrance can be coupled to, second channel is communicated with first passage fluid, and be configured to quote when entrance gets clogged when pressure, with first passage, there is approximately identical pressure, pressure sensor device is configured to the fuel supply of closing when judging that the pressure reduction between first passage and second channel is approximately zero heat exchanger.
Accompanying drawing explanation
Referring now to below in connection with the description of the various drawing figures, wherein:
Fig. 1 is the exploded isometric view of a part for the embodiment of the stove of constructed according to the principles of the present invention;
Fig. 2 is the front isometric view of the embodiment of the CEHB of constructed according to the principles of the present invention;
Fig. 3 is the isometric view below of the CEHB of Fig. 2;
Fig. 4 is the function view of the embodiment of the CEHB of constructed according to the principles of the present invention, shows the normal operating when CEHB is in flat prone position state;
Fig. 5 shows the function view of the CEHB in the blocked Fig. 4 of drainage path;
Fig. 6 is the function view of the embodiment of the CEHB of constructed according to the principles of the present invention, shows the normal operating when CEHB is in upright posture;
Fig. 7 shows the function view of the CEHB in the blocked Fig. 6 of drainage path; And
Fig. 8 is the block diagram of the embodiment of the anti-clogging condensation protection system of constructed according to the principles of the present invention.
Detailed description of the invention
Along with air flows through the heat unit of stove, will produce condensation, condensation is gathered in CEHB usually.For preventing the accumulation of condensation and protecting watch-dog, such as, pressure sensor device, needs suitably to discharge condensation from CEHB.When the stove of routine uses in different attitude; convention furnace may require that multiple pressure sensor device or requirement reappose pressure sensor device; normally to respond to water-water reactor to amass when drainpipe is blocked, and to protect sensing device from the damage of condensation.In addition, when stove is installed as different attitude, also may must reappose for draining or the flexible pipe for induction pressure.
The invention provides the header box comprising and there is integrated anti-clogging condensation protection.No matter stove installs with upright posture or with flat prone position state, and disclosed in the present application is so a kind of anti-clogging condensation protection system, this system be configured to when insert condensate drainage pipe, ventilation or air inlet time closedown enter the fuel of stove.Replacing published requirement for monitoring the stove of multiple switches (being verified the suitable flow of heat exchanger) of combustion pressure, single pressure sensor device disclosed in the present application can be used to monitor combustion pressure and to prevent condensate drainage pipe blocked.Different from convention furnace, when using in different attitude, 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 of gas burner and combustion air persuader.Disclosed CEHB comprises the passage of size and location-appropriate so that fluid is communicated with, and (such as, condensation is blocked) obtains almost identical pressure when condensate drainage pipe upset operation.So, the pressure sensor device being coupled to the pressure port in passage detects zero between passage or is approximately the pressure reduction of zero, and closes the fuel supply to stove.Due to the configuration of passage, the present invention advantageously uses single pressure sensor device to monitor combustion pressure and the blocked situation of drainpipe.Advantageously, the quantity of usually required safety pressure switches can be reduced.
Turn to Fig. 1 now, shown in be the exploded isometric view of a part for the embodiment of the stove 100 of constructed according to the principles of the present invention.Stove 100 can be multi-pose stove.In certain embodiments, stove can be house gas burner.Stove 100 comprises the embodiment of the header box being wherein integrated with condensation-proof blocking protection.Stove 100 comprises shell 110, and this shell 110 has front openings 112, in this front openings 112, has settled installing rack 114.Installing rack 114 has opening 116, and support heat exchanger assemblies 120 on opening 116.Heat exchanger assemblies 120 comprises main heat exchanger 122 and secondary unit 126.Main heat exchanger 122 comprises a line six heat exchanger (being expressed as 124) coupled to each other.Heat exchanger is generally coil pipe, and there is three roughly 180 ° folding, so that heat exchanger is crossed over four times on opening 116, and terminate in (main heat exchanger 122) mouth 125 and (secondary unit 126) outlet 127, entrance 125 and outlet 127 are generally mutually coplanar, and towards the opening 112 of shell 110.The alternative embodiment of heat exchanger assemblies 120 can have at a line 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 142 controlled in thermostatics mode, from valve 142, and across the arm 144 that burner assembly 140 extends, be coupled to one or more gas port (not shown) of arm 144, and one or more burner (not shown) that are corresponding with gas port and that be positioned near gas port.The shown embodiment of burner assembly 140 has a line six burners.The alternative embodiment of burner assembly 140 can have and is arranged in more in a line or multirow or fewer burner.Combustion air intake 146 allows for burner assembly 140 air feed.In assembled configuration, burner assembly 140 is positioned near heat exchanger assemblies 120, so that its burner roughly aligns with entrance 125.
Stove 100 also comprises exhaust persuader assembly 150, wherein has combustion air persuader 154 and is coupled to the flue collar 156 of outlet of combustion air persuader 154.In assembled configuration, exhaust persuader assembly 150 is positioned near heat exchanger assemblies 120, so that the flue collar 156 roughly aligns with flue pipe 148 (not shown), flue pipe 148 is by undesirable gas (gaseous products namely burnt) diversion stove 100.Have the first drain hose and the second drain hose 151,152 to be associated with exhaust persuader assembly 150, they provide the path of discharging flue condensation from flue pipe 148 and the flue collar 156.
Air blast 160 is suspended from shelf 114, so that its outlet (without Reference numeral) is roughly alignd with opening 116.Electronic controller 170 is positioned near air blast 160, and is configured to control air blast, valve 142 and combustion air persuader 154, provides heat to cause stove.Lid 180 can be set above the front openings 112 of shell 110.
CEHB 190 provides interface between combustion air persuader 154 and secondary unit 126.Combustion air persuader 154 has the entrance being coupled to CEHB 190.In assembled configuration, exhaust persuader assembly 150 is positioned near heat exchanger assemblies 120, so that CEHB190 roughly aligns with outlet 127, and the flue collar 156 roughly aligns with flue.
Stove 100 also comprises the pressure sensor device 195 being configured to be monitored combustion pressure by the heat unit of stove 100.Pressure sensor device 195 can be mechanical differential pressure sensor device (as pressure switch) or electronic sensor, and they provide feedback to the integral electronic controller of the stove 100 of such as electronic controller 170 and so on.Pressure sensor device 195 comprises the input for determining combustion pressure.The input of pressure sensor device 195 is coupled to the pressure port of CEHB190.As discussed below, protect pressure port from water pollutions by arranging pressure port in the passage of CEHB 190.
Based on by the pressure reduction of pressure sensor device 195 from the data acquisition received via pressure port, when there being unsuitable air flow over heat amount unit, the gas supply of heat exchanger 120 can close or keep to close.In addition, when condensate drainage pipe infringement or the blocking of CEHB 190, the gas supply of heat exchanger 120 can close or keep to close.So, use the same pressure sensor device 195 of the data of the pressure port from CEHB190 that stove 100 can be protected not make unsuitable air flow over heat amount unit, and protect stove 100 to avoid producing the blocked situation of condensate drainage pipe.Pressure sensor device 195 can be fixed to the mouth of CEHB190 by Conventional hose.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 CEHB 190.
In the embodiment illustrated, controller 170 opens combustion air persuader 154 to start exhaust in heat exchanger (comprising heat exchanger 124), and removes potential harmful unburned or burning gases.Then, controller 170 is opened valve 142 and is entered arm 144 to make gas, and one or more gas port, so gas starts to mix with air to form elementary combustion air.Then, controller 170 activates igniter (not shown in figure 1) to attempt to light elementary combustion air.If the output of flame rectification circuit shows that elementary combustion air is not lighted within a predetermined period of time, then controller 170 valve-off 142, and by the time attempt again to start.If the output of flame rectification circuit shows that elementary combustion air is lighted within a predetermined period of time, then controller 170 activates air blast 160, and this air blast 160 forces air upwards to be walked by opening 116 and heat exchanger assemblies 120.When it is by heat exchanger surperficial, air is heated, so, conveying or point to be equipped with heat is provided as required.
Fig. 2 is the front isometric view of the embodiment of the CEHB of the such as CEHB 190 of constructed according to the principles of the present invention and so on.As noted, CEHB 190 is configured to provide an interface between secondary unit 126 and the combustion air persuader 154 being sucked combustion air by heat exchanger 120.
CEHB 190 is configured to the outlet being provided for the gas of heating to release from heat exchanger via secondary unit 126.CEHB 190 is also configured to remove the condensation be associated with the gas of heating.So, CEHB 190 is formed by the resistive nonmetallic materials of aqueous corrosion usually.CEHB 190, such as, can be made up of plastics.
CEHB 190 may be used in the multi-pose gas burner of such as stove 100 and so on.Therefore, CEHB 190 comprises the assembly of multi-pose drainage system, and this drainage system comprises first row drain port 210, second row drain port 212, left bank water pipe 214 and right drainpipe 216.Be provided with the first and second scavenge ports 210,212, they are configured to the drain hose being coupled to 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 from CEHB 190, remove condensation.
Have flange 220 to be positioned at the four sides of CEHB 190, this flange 220 is configured to CEHB 190 to be attached to secondary unit 126.Flange 220 comprises hole, indicates hole 222, for mechanically CEHB 190 being attached to secondary unit 126.Usually liner is used between flange 220 and secondary unit 126.
CEHB 190 also comprises the support collar 230 for combustion air persuader 154 being coupled to CEHB 190.Therefore, the collar 230 is supported corresponding with the entrance of combustion air blowers 154, for sucking air by heat exchanger 120.Support the collar 230 to help by this way to support combustion air persuader 154, so that two bolts only required by persuader 154, comparatively speaking, be installed to CEHB 190 needs four bolts in a conventional manner.Liner represented in Fig. 1 uses, for CEHB 190 is coupled to combustion air blowers 154 usually together with the support collar 230.
Fixing hole 240 is had, (therefore, also in the entrance of combustion air blowers 154) in the circumference supporting the collar 230.Fixing hole 240 is configured to regulate the air-flow by heat exchanger 120.The size of fixing hole 240 can based on the input size of stove 100.Negative passage supply opening 244 and positive passage supply opening 246 is also had in the circumference supporting the collar 230.Each in this some holes in the front of CEHB190 is provided for the opening supplying air to corresponding passage.Size and the position of fixing hole 240, negative passage supply opening 244, positive passage supply opening 246 can be determined by empirical test, and positive and negative pressure channel 270, the size of 280 and position (shown in Fig. 3), to provide the goal pressure or pressure limit that are detected by pressure sensor device, for determining combustion pressure.The advantage of such layout of CEHB 190 is, the common pressure switch of of such as pressure sensor device 195 and so on may be used for the various input sizes of stove, and the pressure signal being 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 aligning protuberance, as shown in fig 2, for pressure sensor device 195 is coupled to CEHB 190.Depend on type or the model of the pressure sensor device 195 being attached to CEHB 190, the protuberance of connected system 235 and correspondence can be different.
CEHB 190 also comprises normal pressure mouth 250 and negative pressure mouth 260, and they are coupled to positive input terminal and the negative input end of the pressure sensor device of such as pressure sensor device 195 and so on.Pressure sensor device is configured to monitor combustion pressure across fixing hole 240 based on via positive/negative pressure mouth 250,260 in the data that negative input mouth and positive input mouth receive.Positive and negative pressure port 250,260 is coupled to pressure sensor device via 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 to be placed in corresponding passage and away from the opening of corresponding passage, pressure port and pressure sensor device can be protected from the infringement of condensation.
CEHB 190 also comprises spiral base handle 292 and mine dam 295.When 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 the sensitizing range guiding water away from CEHB 190, and the pressure signal that help is safeguarded stability.
Fig. 3 shows the isometric view below of the CEHB 190 of normal pressure passage 270 and negative pressure passage 280.Although invisible in figure 3, normal pressure passage 270 comprises normal pressure mouth 250.In course of normal operation, normal pressure passage 270 and the CEHB 190 main chamber of CEHB 190 (that is, in) have identical or almost identical pressure.So, normal pressure mouth 250 is placed in normal pressure passage 270, can combustion pressure be measured, protect normal pressure mouth 250 from the infringement of condensation simultaneously.Other assemblies of (or in Fig. 2) sightless normal pressure passage 270 and negative pressure passage 280 comprise negative passage supply opening 244, positive passage supply opening 246 in figure 3, and are positioned at the Flow Limit drilling of normal pressure passage 270.In addition, negative pressure passage 280 is included in sightless blow vent in Fig. 2 or Fig. 3.Blow vent is configured to the pressure received by negative passage supply opening 244 to be reduced in the target zone measured at negative pressure mouth 260.Figure 4 illustrates blow vent.Passage 270,280 can be determined by empirical test, and the size of its various assembly, configuration and position, to provide the goal pressure or pressure limit that are detected by pressure sensor device, with interrelated to target pressure drop or the flow by heat exchanger.
The first end of normal pressure passage 270, arrival end 272, extends, as shown in Figure 4 in the support collar 230.Second end of normal pressure passage 270, pressure quotes entrance 274, and the side with first row water pipe and second row water pipe 214,216 towards CEHB190 is opened.Pressure is set and quotes entrance 274, the pressure change will caused in normal pressure passage 270 when making the condensate assembled in CEHB 190 reach undesirable level.Monitor this change by pressure sensor device 195, permission stove cuts out safely in response to this change.Normal pressure passage 270 has quadrangular section, and comprises four parts engaged with 90 degree or about 90 degree, to form the continuous print open channel quoting entrance 274 from arrival end 272 to pressure.
Although invisible in figure 3, negative pressure passage 280 comprises negative pressure mouth 260.Negative pressure passage 280 is configured to the goal pressure or the pressure limit that the high negative pressure power that the porch of combustion air persuader 154 exists are reduced to negative pressure mouth 260 place.So, negative pressure mouth 260 is placed in negative pressure passage 280, can combustion pressure signal be measured, protect negative pressure mouth 260 from the infringement of condensation simultaneously.Negative pressure passage 280 comprises the first end being represented as blind end 282.Second end of negative pressure passage 280, openend 284, the side with first row water pipe and second row water pipe 214,216 towards CEHB 190 is opened.Openend 284 is set, the pressure change will caused in negative pressure passage 280 when making the condensate assembled in CEHB 190 reach undesirable level.Monitor this change by pressure sensor device 195, permission stove cuts out safely in response to this change.Negative pressure passage 280 has quadrangular section, and comprises four parts of joint, to form the continuous print open channel from blind end 282 to openend 284.
What be positioned at the supply section 286 of negative pressure passage 280 is negative passage supply opening 244.The part comprising the supply section 286 of negative passage supply opening 244 is placed in the circumference of the support collar 230, therefore, in the entrance 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, to protect negative pressure mouth 260 from pollution.
Negative passage supply opening 244 is oriented to carry out fluid with the entrance of combustion air persuader and is communicated with.Negative pressure mouth 260 in negative pressure passage 280 can be coupled to the input of such as negative input end and so on of pressure sensor device.Similarly, normal pressure passage supply opening 246 is oriented to carry out fluid with the entrance of combustion air blowers and is communicated with, and normal pressure mouth 250 can be coupled to the input of such as positive input terminal and so on of pressure sensor device.Normal pressure passage 270 carries out fluid with negative pressure passage 280 and is communicated with, and be configured to when pressure quote entrance 274 blocked time (such as, be condensed blocking) there is approximately identical pressure.CEHB 190 is so designed, and wherein, is also even correct when comprising CEHB 190 is installed to be multiple attitude.In the operating process of quoting combustion air blowers when entrance 274 does not have blocked when pressure (, in the course of normal operation when there being suitable drainpipe), normal pressure passage 270 is configured to have normal pressure compared with negative pressure passage 280.
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 the normal operating of when CEHB 190 is in flat prone position state (that is, the stove comprising CEHB190 is installed to be upper reaches attitude).Fig. 4 provides the section of CEHB 190, to clearly show that the operation of the positive and negative passage 270,280 in the entrance of combustion air persuader 154.Except assembly mentioned before CEHB 190, Fig. 4 also show the blow vent 440 of negative pressure passage 280 and the Flow Limit drilling 450 of normal pressure passage 270.
Blow vent 440 is designed to the negative pressure that drainage receives via negative pressure passage supply opening 244.Blow vent 440 is oriented to avoid water pollutions in CEHB 190.The position of selected blow vent and size, turn to the target pressure value at negative pressure mouth 260 place or the scope of value to make the high negative pressure power specification of the entrance area of combustion air persuader 154.So, the pressure sensor device of single type may be used for various model.
Flow Limit drilling 450 is configured to limit flows from the air of normal pressure passage supply opening 246 by normal pressure passage 270.The size of Flow Limit drilling 450 can be selected, to coordinate with normal pressure mouth 250.
In course of normal operation, condensation is gathered in below CEHB 190, and when CEHB 190 is levels, CEHB 190 is connected to both left side drainpipe 214 and right side drainpipe 216.Left side drainpipe 214 and right side drainpipe 216 both can provide drainage path for condensation.In certain embodiments, only can use drainpipe 214, one in 216, and deliberately insert untapped drainpipe.
Although provide unimpeded drainage path for discharging condensation, pressure is quoted entrance 274 and to be condensed dredging, and the pressure in normal pressure passage 270 represents the pressure in CHEB 190.So, the pressure reduction existed between negative pressure passage 280 and normal pressure passage 270 is kept.
When condensation is not discharged from CEHB 190, condensation accumulation retaining pressure quotes entrance 274, as shown in Figure 5.Therefore, the pressure in 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 negative pressure passage 280 is driven to zero or about zero.Responsively, the pressure sensor device of such as pressure sensor device 195 being coupled to negative and positive supply opening 260,250 and so on can be closed to the gas of heat exchanger 120.
Show similar operation in figure 6 and figure 7, wherein, CEHB 190 is in upright posture (that is, to be on the left of level with the stove of CEHB 190 or attitude on the right side of level).As shown in Figure 6 and Figure 7, on the lower limit be the face that the pressure being coupled to single drainpipe (that is, right side drainpipe 216) quotes near entrance 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 the 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 of the stove 100 and so on of such as 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 sensor device of such as pressure switch and so on.Can alternatively, pressure sensor device 810 can comprise the electronic sensor providing feedback to integral electronic controller.
Between the heat exchanger that header box 820 is configured to be coupling in the stove be associated with pressure sensor device 810 and combustion air persuader.Some assemblies of header box 820 discussed below are invisible in fig. 8.Header box is built as the condensation-proof blocking that is wherein integrated with the passage using fluid to be communicated with and protects at least partially.Header box 820 comprises the first passage of first pressure port 824 with the first passage supply opening 822 that the inlet fluid that is oriented to the combustion air blowers be associated with stove is communicated with and the first input end 812 that can be coupled to pressure sensor device 810.Header box 820 also comprises and has the second channel that the second channel supply opening 826 being oriented to be communicated with the inlet fluid of combustion air blowers, the second pressure port 828 of second input 814 that can be coupled to pressure sensor device 810 and pressure quote entrance.Second channel is built as and is communicated with first passage fluid, and be configured to when pressure quote entrance blocked time with first passage, there is approximately identical pressure.Pressure sensor device 810 is configured to the fuel supply of closing when judging that the pressure reduction between first passage and second channel is approximately zero heat exchanger.Have zero or the pressure reduction that is approximately zero show that the drainpipe of header box 820 is blocked.Header box 820 can be as shown in the figure and as discussed above CEHB 190.
It will be apparent to one skilled in the art that involved by the application can be carried out other to described embodiment and further add, delete, substitutions and modifications.
Claims (9)
1. a cold junction header box for stove, comprising:
There is the first passage of the first pressure port of the first passage supply opening being oriented to be communicated with the inlet fluid of combustion air persuader and the first input end that can be coupled to pressure sensor device; And
There is the second channel supply opening being oriented to be communicated with the described inlet fluid of described combustion air persuader, the second channel that the second pressure port of the second input of described pressure sensor device and pressure quote entrance can be coupled to, described second channel is communicated with described first passage fluid, and be configured to quote when entrance gets clogged when described pressure at described first pressure port place, to there is approximately identical pressure with described first passage at described second pressure port place, and when described pressure to be quoted when entrance does not get clogged during the operation of described combustion air persuader, at described second pressure port place, there is normal pressure compared with the pressure of described first passage at described first pressure port place, wherein said first pressure port is positioned at described first passage and described second pressure port is positioned at described second channel.
2. cold junction header box as claimed in claim 1, also comprise the support collar for described cold junction header box being coupled to described combustion air persuader, wherein, the described support collar is corresponding with the described entrance 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 located completely in the circumference of the described support collar.
4. 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 multiple Installation posture, quote when entrance gets clogged have approximately identical pressure when described pressure.
5. cold junction header box as claimed in claim 1, also comprise two drainpipes being configured to when described stove is installed as flat prone position state, condensation be discharged described cold junction header box, wherein, use one in described two drainpipes described cold junction header box is discharged in condensation when described stove is installed as upright posture.
6. a stove, comprising:
Heat exchanger;
Be configured to generate the combustion air persuader by the air-flow of described heat exchanger;
Single pressure sensor device; And
Header box, is coupling between described heat exchanger and described combustion air persuader, and be configured to the condensation assembled from described air-flow and provide drainpipe for described condensation, described header box comprises:
There is the negative pressure passage of the negative pressure mouth of the negative pressure passage supply opening being oriented to be communicated with the inlet fluid of described combustion air persuader and the negative input end that can be coupled to described pressure sensor device; And
There is the normal pressure passage supply opening being oriented to be communicated with the described inlet fluid of described combustion air persuader, the normal pressure passage that the normal pressure mouth of the positive input terminal of described pressure sensor device and pressure quote entrance can be coupled to, described normal pressure passage and described negative pressure passage, and be configured to quote when entrance gets clogged when described pressure at described negative pressure mouth place, to there is approximately identical pressure with described negative pressure passage at described normal pressure mouth place, and when described pressure to be quoted when entrance does not get clogged during the operation of described combustion air persuader, at described normal pressure mouth place, there is normal pressure compared with the pressure of described negative pressure passage at described negative pressure mouth place, and wherein said pressure sensor device is configured to monitoring by the combustion pressure of described heat exchanger and the condensate drainage pipe got clogged of described header box.
7. stove as claimed in claim 6, wherein, described pressure sensor device is configured to the fuel supply of closing when detecting that the pressure reduction in described negative pressure passage and described normal pressure passage is approximately zero described heat exchanger.
8., for an anti-blocking condensation protection system for stove, comprising:
Be configured to monitor the pressure sensor device by the combustion pressure of the heat exchanger of described stove; And
Be configured to be coupling between the described heat exchanger of described stove and combustion air persuader, assemble condensation from described stove and provide the header box of drainpipe for described condensation, described header box comprises:
There is the first passage of the first pressure port of the first passage supply opening that the inlet fluid that is oriented to the combustion air persuader be associated with described stove is communicated with and the first input end that can be coupled to described pressure sensor device;
There is the second channel supply opening being oriented to be communicated with the described inlet fluid of described combustion air persuader, the second channel that the second pressure port of the second input of described pressure sensor device and pressure quote entrance can be coupled to, described second channel is communicated with described first passage fluid, and be configured to quote when entrance gets clogged when described pressure at described first pressure port place, to there is approximately identical pressure with described first passage at described second pressure port place, and when described pressure to be quoted when entrance does not get clogged during the operation of described combustion air persuader, at described second pressure port place, there is normal pressure compared with the pressure of described first passage at described first pressure port place, and
For described header box being coupled to the support collar of described combustion air persuader, the wherein said support collar corresponds to the described entrance of described combustion air persuader and described first passage supply opening and described second channel supply opening are positioned at the circumference of the described support collar, wherein said pressure sensor device is configured to the condensate drainage pipe got clogged of monitoring described combustion pressure and described header box, and closes the fuel supply to described heat exchanger when judging that the pressure reduction between described first passage and described second channel is approximately zero.
9. anti-blocking condensation protection system as claimed in claim 8, wherein said pressure quotes the openend that entrance is the described second channel of one side towards the described header box with two drainpipes.
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 | 2010-07-12 | ||
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102128556A CN102128556A (en) | 2011-07-20 |
| CN102128556B true CN102128556B (en) | 2014-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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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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| CN (1) | CN102128556B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5749355A (en) * | 1996-08-27 | 1998-05-12 | Lennox Industries Inc. | Multi-position furnace with condensing heat exchanger |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4309977A (en) * | 1980-05-12 | 1982-01-12 | Kitchen John A | Pulse combustion apparatus |
| US7036498B2 (en) * | 2003-12-10 | 2006-05-02 | Lennox Manufacturing Inc. | Multi-position furnace |
| US8056553B2 (en) * | 2007-06-25 | 2011-11-15 | 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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2010
- 2010-12-20 CN CN201010594963.0A patent/CN102128556B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5749355A (en) * | 1996-08-27 | 1998-05-12 | Lennox Industries Inc. | Multi-position furnace with condensing heat exchanger |
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| CN102128556A (en) | 2011-07-20 |
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