CN2238402Y

CN2238402Y - Temp. controller for gas-fired water heater

Info

Publication number: CN2238402Y
Application number: CN 95242048
Authority: CN
Inventors: 袁昌平
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-08-23
Filing date: 1995-08-23
Publication date: 1996-10-23
Anticipated expiration: 2005-08-23

Abstract

The utility model relates to a water temperature controller for a fuel gas water heater. A cold water inlet channel of the utility model is composed of a main channel and a by-pass channel. After the cold water of the main channel is heated by a water heater and a heat exchanger, the cold water of the main channel is mixed with the cold water of the by-pass channel; the mixing hot water is contained by a main cavity body, and the mixing hot water flows out from a water outlet of the main cavity body to be used; the temperature of the mixing hot water is adjusted by the flow quantity of the cold water of the by-pass channel. The by-pass channel and a fuel gas channel are respectively provided with valves, and the two valves are driven by a corrugated pipe which is arranged in the main cavity body. The temperature sensing medium which is filled in a sealing cavity body is also arranged in the main cavity body; anti-thrust elements are also arranged on the corrugated pipe and the element stroke which is controlled by the corrugated pipe. The anti-thrust elements are used for controlling the corrugated pipe to drive a by-pass valve before a fuel gas valve is driven, and the temperature sensing medium generates expansive force to drive the corrugated pipe; the flow capacity of the cold water of the by-pass valve is adjusted, the water temperature is too high, which exceeds the adjusting capability of the by-pass valve, the anti-thrust elements are touched, the fuel gas valve is driven by the corrugated pipe to move, the gas flow is diminished, and the water temperature is limited.

Description

The gas heater water temperature control device

The utility model relates to a kind of gas heater water temperature control device.

Present commercially available gas heater, adjusting of its outlet hot water temperature is mainly passed through to change import cool water quantity size and is regulated the gas quantity realization.By using and investigate discovery, many inconvenience are arranged with adjusted: the one, adjusting place of import cool water quantity has suitable distance to hot-water nozzle, and time lag is very big, repeatedly can must regulate repeatedly, wastes time and energy; The 2nd, be difficult to accurately control leaving water temperature, though the water heater that has indicates water temperature at the cold water switch place, aqueous vapor pressure difference is difficult to guarantee that by regulating import cold water water temperature is in temperature required scope everywhere; The 3rd, during hydraulic pressure low excessively (as skyscraper), more difficultly effectively control the outlet water temperature by regulating the import water yield; The 4th, general water heater needs locellus to install, and needs by other people so gas quantity is regulated, quite trouble; The 5th, can't preset to fixed temperature; The 6th, all be unable to cope with regular vapour pressure fluctuation with adjusted, need readjust after the variation, as change excessively, scald easily.

The purpose of this utility model is, realizes the automatic control of water heater leaving water temperature, suppresses the vapour pressure fluctuation, and the automatic stabilisation water temperature is in given temperature range.

The utility model is to realize its purpose like this, the cooling water inlet passage is made up of main channel and by-pass, main channel cold water partly heats through water-heater heat-exchanging, by-pass cold water is without heating, main channel water direct and after the heating mixes, mixed hot water is held through main cavity outlet outflow for using by main cavity, heat of mixing water temperature is by by-pass cold water Flow-rate adjustment, be provided with corrugated pipe elastic element in the main cavity, by-pass and blast tube are provided with valve, valve is driven by bellows, also be provided with temperature sensing medium in the main cavity, temperature sensing medium charges in a closed cavity, isolates with water, also be provided with thrust member on bellows and the institute's control elements stroke thereof, the effect of thrust member is that control wave line pipe drives cold water bypass road valve prior to driving burnt gas valve.The hot water temperature is by the temperature sensing medium perception in the main cavity, and produce corresponding expansive force and promote bellows and move, bellows then drives the by-passing valve action, change bypass cold water flow, under balancing spring or self Spring balanced, bellows makes by-passing valve keep the open degree corresponding with design temperature, control bypass cold water flow, make leaving water temperature remain on setting range, when the hot water temperature changes in the vapour pressure fluctuation, main cavity, bellows drives the by-pass valve and transfers greatly or turn down the cold water flow under the bulbs of pressure effect that changes, leaving water temperature is stable at setting range, and is too high as water temperature, surpasses the by-passing valve regulating power, thrust member is touched, bellows drives the gas valve action, turns tolerance down, suppresses water temperature.

Temperature sensing medium can charge in the bellows of sealing, and balancing spring is set, balancing spring can be located at by-pass valve body end or other position of bellows stroke, balancing spring and bellows all keep certain pre compressed magnitude, its pre compressed magnitude can be regulated by thread screw or flat push type mechanism, to change the design temperature height.

Temperature sensing medium also can charge in the seal chamber of bellows outer wall and a shell garden columnar member formation, one spring can be set increase bellows stiffness, also can utilize the temperature sensing medium bulbs of pressure and bellows self Spring balanced, be provided with regulating element between bellows and the by-passing valve valve body, regulating element is used to change design temperature.

The by-pass valve body has a tube-in-tube structure, forms governing loop with the bellows drive rod, changes the sleeve stroke, gets final product the relative position of regulation valve body and bellows initial state, reaches the purpose that changes design temperature.

Also bellows push rod front end can be made stretching structure, by-pass valve body keeps original position by a back-moving spring and stop, adjusts the distance before push rod length can be adjusted push rod contact valve body, reaches the purpose that changes design temperature.

The by-passing valve valve body is provided with safety vent, leak as temperature sensing medium, the suffered bulbs of pressure of bellows acutely descend, bellows is return under balancing spring or the effect of self-recovery elastic force, drive by-passing valve, move to safety vent, make the by-pass standard-sized sheet over against position, aperture, by-pass, prevent that water temperature is too high, have an accident.

The bellows installation end can be provided with a flexible member, the rigidity of flexible member is greater than the rigidity of balancing spring, installation end can move back and forth along axis, as the too high by-pass valve regulated ability that exceeds of water temperature, fixed thrust member is touched, and the bellows free end stops to move, the temperature sensing medium expansive force overcomes flexible member elastic force, installation end is oppositely moved, drive burnt gas valve, turn gas quantity down.

Thrust member also can be designed to packaged type, and a back-moving spring is set, and thrust member one end acts on burnt gas valve, and when thrust member is triggered, the fixing bellows free end of installation end will drive thrust member, turn the gas valve flow down.

Temperature sensing medium can use liquid, gas, the especially suitable low-boiling point liquid that uses, and utilizes its full steam pressure that closes to promote bellows.

Too high for preventing initial water temperature, this delivery port of main chamber is provided with orifice plug or throttle orifice, guarantees that hot water has enough incorporation times in the main cavity.

The main cavity delivery port also can be from the by-pass or the main channel introduce a tributary cold water, affluent channel is provided with valve, this valve is driven by bellows, before the bellows action, this valve wide open, tributary cold water mixes with main cavity outlet hot water, prevents that the preceding leaving water temperature of temperature control system work is too high, drive the tributary valve during bellows action and close, outlet the hot water temperature regulated by temperature control system.

Thrust member is threaded or telescoping structure, in order to regulating the relative position of thrust member and bellows initial state, to change gas valve driven opportunity, reaches the purpose of adjustment maximum water temperature.

The main cavity hot water outlet is arranged at cavity top, and water inlet is arranged at the cavity bottom, to guarantee that mixed hot water is by the abundant perception of temperature sensing medium.

The gas valve controlling organization can be made up of swinging cone valve, revoliving arm, push rod and back-moving spring.

By-passing valve can be made into cone valve or reciprocating motion type valve, and reciprocating type valve body is the garden cylindricality, and has the anti-rotation bit architecture, and perforate can be garden shape, Chang Yuan, ellipse garden shape or closes the irregularly-shaped hole that the vapour pressure nonlinear characteristic is consistent with low-boiling point liquid is full on the by-pass valve body.

Bypass cold water can mix with it before main channel hot water enters main cavity, to reduce the degree of temperature lag.

On bellows and the institute's control elements thereof contact switch can be set, during bellows work, contact switch touches and design temperature corresponding circuits switch, driving pilot bulb demonstration water temperature regulates, water temperature is regulated and is finished, and water temperature is crossed high state, and the display unit operating circuit is by dry cell power supply.

This practical water temperature self-con-tained unit that provides is because the cooling water inlet passage that water heater is single changes main channel and by-pass cooling water inlet into, main channel hot water after heating with the by-pass cold water mix, water temperature is by by-pass cold water Flow-rate adjustment, this regulates reliable rapidly, temperature lag is little, and can avoid regulating the dry combustion method phenomenon that single cold water channel may cause, produce corresponding expansive force by hot water temperature in the temperature sensing medium perception main cavity and promote the bellows action, regulate bypass cold water flow, technology maturation, regulate reliable, can effectively suppress the vapour pressure fluctuation, stablize leaving water temperature within setting range, as the too high by-passing valve regulating power that exceeds of water temperature, can turn burnt gas valve down by thrust member control, suppress water temperature, whole temperature control process realizes the adjusting of aqueous vapor two-way automatically, and the different set temperature can be set voluntarily, also design has the maltilevel security device, effectively prevents unexpected the scald.

Figure one, the attemperating unit structure chart; Figure two, the attemperating unit system diagram; Figure three, governing loop schematic diagram 1; Figure four, governing loop schematic diagram 2; Figure five, the safety device schematic diagram.

The utility model embodiment is, changing the single cooling water inlet of former water heater is that main channel 2 and by-pass 3 enter cold water, main channel cold water is equivalent to former water heater import cold water, heat through heat exchanger, by-pass cold water directly mixes with main channel hot water 12 without heating, and mixed hot water is held by main cavity 5, flow out use via main cavity delivery port 4, regulate the purpose that bypass cold water flow can reach the control leaving water temperature.Big or small distribution principle main, the by-pass is, when by-pass standard-sized sheet under specified vapour pressure, water flow reaches the water heater rated flow, leaving water temperature reaches nominal temperature (be generally former water temperature and add 25 ℃), when the full cut-off of by-pass, main channel hydraulic pressure should use minimum hydraulic pressure (referring to that former hydraulic pressure is normal) greater than water heater, and guarantees that leaving water temperature is lower than daily use maximum temperature (being generally 65 ℃).By-pass 3 is provided with valve 14 blast tubes 9 and is provided with valve valve 10, and valve 14 and valve 10 generally should be provided with separately and other by-pass valve control difference of water heater.Be provided with bellows 6 in the main cavity 5, the main effect of bellows 6 is to drive valve 14,10, also is provided with temperature sensing medium 7 in the cavity 5, and temperature sensing medium can directly charge in the bellows 6 of sealing, and bellows serves as the thermometer bulb isolated component again like this; Temperature sensing medium also can charge in by bellows outer wall and the shell seal chamber 25 that part 24 is formed in addition, when temperature sensing medium charges in bellows 6, balancing spring 20 need be set, spring 20 can be arranged in the main cavity, the free end of bellows, extension spring, stage clip all can, also can be arranged at a certain boss of bellows push rod place, but preferably be arranged at valve body 14 ends, be convenient to regulate it and give decrement by screw thread dish 18, bellows and spring all is compressed and be in equilibrium state with temperature sensing medium initial pressure three before the work, the bellows operating conditions extends forward for overcoming spring force; When temperature sensing medium charged in cavity 25, a spring can be set increased bellows stiffness, also can not establish, and bellows keeps certain pre compressed magnitude and medium 7 initial pressure balances, and operating conditions promptly is subjected to medium 7 pressure to be compressive state.Temperature sensing medium can use with mercury and dimethylbenzene as the liquid of representative or with the gas of nitrogen as representative, but preferably uses with the low-boiling point liquid of chloroethanes as representative.When meeting special circumstances, low and the easy fluctuation as skyscraper hydraulic pressure, when air pressure is enough big, import 12 water temperatures are too high, the by-pass valve wide open also can't suppress water temperature, or when using low discharge lower temperature water, all need in time turn burnt gas valve 10 down, obviously, this adjusting should be to carry out after by-passing valve is regulated, control the sequencing that bellows drives valve 14 and valve 10 so thrust member 19 is set, thrust member is generally positioned at the end that bellows drives valve 14 adjustment stroke, as the terminal position of valve body 14.Water temperature is too high when using in order to control low discharge, and thrust member 19 installation ends are threaded in order to regulate itself and the initial position of bellows and valve body 14, and thrust member also can have tube-in-tube structure, by the translation mechanism back clamping of adjusting to the right place.

The device working condition is as follows, during original state, bellows place poised state, valve body 14 is very little open degree or closed condition, cavity 5 imports 12 hot water temperatures generally higher (but being lower than maximum operation (service) temperature), hot water enters cavity 5, this temperature of the rapid perception of temperature sensing medium, produce corresponding expansive force, the promotion bellows moves, and drives valve body 14 simultaneously and moves, and increases with open degree, bypass cold water flow increases, the mixing water temperature descends in the chamber 5, and medium 7 expansive forces descend, under balancing spring 20 or bellows self Spring balanced, when mixed water temperature is reduced to the design temperature scope, valve body 14 keeps a corresponding open degree simultaneously; Rise sharply as water temperature, medium 7 expansive forces strengthen, and bellows drives valve body and increases open degree, and then water temperature is suppressed, and keep new stablizing near original temperature, and vice versa.Near maximum operation (service) temperature, then valve body 14 still keeps closing or a small amount of opening at bellows stroke latter end as design temperature.Though the initial hot water temperature generally is lower than maximum operation (service) temperature, but still need take necessary security measures for preventing unexpected the scald, throttle orifice 4 or orifice plug 23 can be set at main cavity delivery port 4 places, make hot water before flowing out main cavity enough incorporation times be arranged, the design of this throttle orifice and orifice plug must guarantee that hydraulic pressure can not be greater than hydraulic pressure in the water heater aqueous vapor interstage valve in the main cavity; Also can be at 5 delivery ports, 4 places, main chamber from the by-pass or the main channel introduce a safe cold water tributary 31, the tributary is by valve 32 controls, before bellows work starts, valve 32 standard-sized sheets, make the initial hot water of higher temperature suppressed by tributary cold water at delivery port, bellows starts the back is closed valve 32 by ejection element 33, and delivery port the hot water temperature regulated by temperature control system.For increasing hot water and thermometer bulb time of contact, main cavity water inlet 12 can be located at the bottom, and delivery port 4 is located at top.Another safety measure is that safety vent 16 is set on valve body 14, and hole 16 is arranged at normal perforate rear end, when temperature sensing medium leaks, bellows is disappeared by the bulbs of pressure, to return the 14 normal perforates of drive valve body and close under effect under spring 20 or self elastic force, safety vent moves to the by-pass, with its conducting.Gas valve 10 controlling organizations can be by revolution cone valve 10, revoliving arm 11, and push rod 8 and back-moving spring are formed.The bellows installation end can be fixed in the cavity 5, thrust member 21 is designed to reciprocating motion type, spring 22 is used to reset, thrust member one end acts on air valve revoliving arm 11, still element 21 is touched moving then when bellows drive valve body 14 is covered whole setting strokes, bellows will promote it and move, and turn gas quantity down; Thrust member 19 also can be designed to fixed, the bellows installation end is provided with a flexible member 13, the rigidity of element 13 should be greater than the rigidity of balancing spring 20, installation end 8 can move along axis, when thrust member is touched, the bellows free end stops to move, and media expansion is made every effort to overcome clothes element 13 elastic force oppositely moves installation end, turns gas quantity down by push rod 8.The change of design temperature can be finished by the regulating spring 20 and the preshrunk amount of bellows 6, also the line pipe can be by the stroke of regulating sleeve 26 with push rod 27, changing by-pass valve body 25 finishes with the relative position of bellows initial state, also can utilize spring 30 and stop 29 to keep valve body 14 invariant positions, the stroke that changes bellows push rod front end sleeve 28 carries out.

By-passing valve 14 can be made into cone valve 25 or reciprocating motion type garden column valve 14, garden column valve 14 has the anti-rotation bit architecture, perforate can be garden shape, Chang Yuan, ellipse garden shape or closes the irregularly-shaped hole that the vapour pressure nonlinear characteristic is consistent with low-boiling point liquid is full on the valve body, guarantee realizing the linearity adjustment of temperature, bypass cold water is preferably in main channel hot water to be mixed with it to reduce the temperature lag degree before entering main cavity.For easily manufactured, housing 1 can hold the element of whole passages to receive and is one.For convenient the use also can be provided with a display circuit, by bellows and institute's control elements circuits for triggering switch thereof, drive indicator lamp demonstration water temperature and regulate, water temperature is regulated and is finished, and water temperature is crossed high state, and dry cell is preferably used in the display unit power supply.For improving automaticity, also can utilize the change of step motor control design temperature, utilize sensing technology, look environment temperature automatic setting optimum temperature range.Be provided with many places sealing ring 17 for preventing to leak.

Claims

1, a kind of gas heater water temperature control device, it is characterized in that the cooling water inlet passage is made up of main channel 2 and by-pass 3, main channel cold water directly mixes with by-pass cold water after the heat exchanger heating, mixed hot water is held through 4 outflows of main cavity delivery port for using by main cavity 5, the mixed hot water temperature is by by-pass 4 cold water Flow-rate adjustment, be provided with bellows 6 in the main cavity 5, the by-pass is provided with valve 14, blast tube 9 is provided with valve 10, two valves drive by bellows, also be provided with temperature sensing medium 7 in the main cavity, medium 7 charges in a seal chamber, isolate with water, also be provided with thrust member 19 on bellows and the institute's control elements stroke thereof, the effect of element 19 is that control wave line pipe drives bypath valve 14 prior to driving burnt gas valve 10, produce corresponding expansive force by hot water temperature in the temperature sensing medium 7 perception cavitys 5, promote bellows and drive by-passing valve 14 actions, under balancing spring 20 or bellows self Spring balanced, make by-passing valve 14 keep the open degree corresponding with design temperature, keep leaving water temperature at setting range, fluctuating temperature in the main cavity, bellows drives by-passing valve and oppositely regulates the cold water flow under the bulbs of pressure that change, water temperature stability is in setting range, and water temperature is too high, surpasses the regulating power of by-passing valve 14, thrust member 19 is touched, bellows 6 drives gas valve 10 actions, turns tolerance down, suppresses water temperature.

2, control device according to claim 1, it is characterized in that temperature sensing medium 7 charges in the bellows 6 of sealing, be provided with balancing spring 20, balancing spring and bellows all keep certain pre compressed magnitude, its decrement can be regulated by a screw thread dish 18 or a telescopic horizontal sliding mechanism, in order to change design temperature.

3, control device according to claim 1, it is characterized in that, temperature sensing medium charges in the seal chamber 25 of bellows outer wall and a shell elements 24 formation, one spring can be set increase bellows stiffness, also can utilize media expansion pressure and bellows self Spring balanced, be provided with governing loop (26,27,28,29,30) between bellows and the by-passing valve.

4, control device according to claim 1 and 2, it is characterized in that, bellows 6 installation ends 8 are provided with flexible member 13, the rigidity of flexible member 13 is greater than the rigidity of balancing spring 20, and installation end 8 can move back and forth along axis, and fixed thrust member 19 is touched, the bellows free end stops action, medium 7 expansive forces overcome flexible member 13 elastic force, and installation end is oppositely moved, and push rod 8 is turned burnt gas valve 10 down.

5, control device according to claim 1, it is characterized in that the bellows installation end fixes, thrust member 21 is a reciprocating motion type, and back-moving spring 22 is set, thrust member 21 1 ends act on gas valve 10, and thrust member is driven thrust member by the bellows free end after touch and turns tolerance down.

6, control device according to claim 1, it is characterized in that thrust member (19,21) can regulate with the relative position of bellows initial state to adjust maximum water temperature.

7, control device according to claim 1 is characterized in that the by-passing valve valve body is provided with safety vent 16, leaks as temperature sensing medium 7, rapidly conducting by-pass 3.

8, control device according to claim 1 is characterized in that main cavity 5 delivery ports 4 are provided with throttle orifice 4 or orifice plug 23.

9, control device according to claim 1 is characterized in that, the delivery port 4 of main cavity 5 is introduced a tributary cold water 31, before the bellows action, and tributary valve 32 standard-sized sheets, after bellows started, ejection element 33 was closed tributary valve 32.

10, control device according to claim 1 is characterized in that, by-pass 3 cold water and main channel hot water 12 mixed before entering main cavity 5.