DK168546B1

DK168546B1 - Valve device for a hot water heating system

Info

Publication number: DK168546B1
Application number: DK200788A
Authority: DK
Inventors: Lbaek Jens J Rgen M; Erik Kyster; Kaj Christensen
Original assignee: Danfoss As
Priority date: 1987-04-15
Filing date: 1988-04-13
Publication date: 1994-04-18
Also published as: DE3712878C1; DK200788D0; DK200788A

Description

DK 168546 B1 IDK 168546 B1 I

Opfindelsen angår en ventilanordning for et varmtvands-var- IThe invention relates to a valve device for a hot water heater

meanlæg, især med gulvopvarmning, med en blandeventil, som Imeanders, especially with underfloor heating, with a mixing valve such as I

har to af et fælles indstillingsorgan i modsat retning akti- Ihas two of a common setting device in the opposite direction acti- I

verbare fødeventiler til forsyning af et blandekammer fra et Iverbal feed valves for supplying a mixing chamber from an I

5 fremløbskammer og et tilbageløbskammer. I5 flow chamber and one reflux chamber. IN

Ved gulvopvarmningsanlæg er det kendt for hver enkelt varme- IAt floor heating systems it is known for each individual heating

kreds, som fx består af rørslangen i et rum, at anbringe en Icircuit, which consists, for example, of the tube hose in a room, to place an I

blandeventil og en cirkulationspumpe. Cirkulationspumpen be- Imixing valve and a circulation pump. The circulation pump is I

virker en så høj gennemstrømningshastighed, at der ikke kan Iis such a high flow rate that you cannot

10 indstilles ubehageligt store temperaturdifferenser mellem I10, uncomfortably large temperature differences are set between I

begyndelsen og enden af varmefladen. Ved hjalp af blandeven-tilen kan temperaturen af det kredsen tilførte vand holdes så lav, at der ikke optræder for høje overfladetemperaturer, og at der ikke sker for stor varmeafgivelse. Det er herved 15 uden betydning, at fremløbstemperaturen ofte af andre grunde skal have højere værdier, fx når også konvektions-varmelegemer skal forsynes med varmt vand, når ugunstigt beliggende rum har et væsentligt større varmebehov, eller når fremløbs-temperaturen ved et fjernvarmeanlæg er foreskrevet.the beginning and end of the heating surface. With the aid of the mixing valve, the temperature of the water supplied to the circuit can be kept so low that no high surface temperatures occur and that no excessive heat release occurs. It is therefore of no consequence that the flow temperature often has to be higher values for other reasons, for example, when also convection heaters must be supplied with hot water, when disadvantaged space has a significantly greater heat demand or when the flow temperature at a district heating system is prescribed. .

20 Den på denne måde opnåede komfort forårsager imidlertid forholdsvis store omkostninger. For til hver kreds skal der være en cirkulationspumpe.20 However, the comfort thus obtained causes relatively high costs. For each circuit there must be a circulation pump.

Formålet med opfindelsen er at angive en ventilanordning af den i indledningen beskrevne art, ved hvilken en sikker tem- DK 168546 B1 2 peraturindstilling er mulig i hver varmekreds, og et forudbestemt temperaturfald ikke overskrides ved anvendelse af kun en cirkulationspumpe for flere varmekredse.The object of the invention is to provide a valve device of the kind described in the introduction, in which a safe temperature setting is possible in each heating circuit, and a predetermined temperature drop is not exceeded by using only a circulation pump for several heating circuits.

Denne opgave løses ifølge opfindelsen ved, at der i serie 5 med fødeventilen på tilbageløbssiden er anbragt en drosselventil, som af det fælles indstillingsorgan kan indstilles i modsat retning af denne fødeventil på tilbageløbssiden.This task is solved according to the invention in that in series 5 with the feed valve on the reflux side is arranged a throttle valve which can be adjusted by the common adjusting means in the opposite direction of this feed valve on the reflux side.

Den yderligere, men af det samme indstillingselement aktiverede drosselventil sørger for, at den tilhørende varmekreds 10 tilføres en af indstillingsorganets stilling afhængig gennemstrømningsmængde. Ved faldende varmebehov ændres derfor ikke kun blandingsforholdet, men også gennemstrømningsmængden. Ved stort varmebehov fås ved høj temperatur af blande-vandet en stor gennemstrømningsmængde, således at tempera-15 turfaldet fra kredsens indgang til udgangen af denne grund forbliver ringe. Ved ringe varmebehov er gennemstrømningsmængden ligeledes ringe. Da temperaturen imidlertid kun ligger lidt over rumtemperaturen på grund af den større andel af tilbageløbsvand i blandevandet, er der igen sørget for, 20 at temperaturfaldet i kredsen forbliver ringe.The throttle valve, but activated by the same adjusting element, ensures that the associated heating circuit 10 is supplied with a flow rate dependent on the position of the adjusting member. Therefore, with decreasing heat demand, not only the mixing ratio but also the flow rate changes. At high heat demand, at high temperature of the mixing water, a large flow rate is obtained, so that the temperature drop from the input of the circuit to the output for this reason remains low. In case of low heat demand, the flow rate is also low. However, since the temperature is only slightly above room temperature due to the greater proportion of reflux water in the mixing water, it is again ensured that the temperature drop in the circuit remains low.

Ved en foretrukken udførelsesform er der sørget for, at indstillingsorganet er et ventilskaft, som foruden fødeventil-lukkestykkerne bærer et drosselventil-lukkestykke, og at væggen mellem tilbageløbskammer og blandekammer på begge si-25 der har et ventilsæde. Dette giver en særlig enkel aktiveringsmåde. Selvfølgelig kan lukkestykkerne være anbragt forskydelige i forhold til hinanden på ventilskaftet.In a preferred embodiment, the adjusting means is provided with a valve shaft which, in addition to the feed valve closures, carries a throttle valve closure, and that the wall between the return chamber and mixing chamber on both sides has a valve seat. This provides a particularly simple mode of activation. Of course, the closures may be slidable relative to each other on the valve stem.

Især kan fødeventil-lukkestykkerne være anbragt i blandekam-meret, og drosselventil-lukkestykket kan være anbragt i til-30 bageløbskammeret. Et alternativ med omvendt aktiveringsretning består i, at fødeventil-lukkestykkerne er anbragt i fremløbs- og tilbageløbskammeret, og drosselventil-lukkestykket er anbragt i blandekammeret.In particular, the feed valve closures may be disposed in the mixing chamber and the throttle valve closure may be disposed in the backflow chamber. An alternative with reverse activation direction is that the feed valve closures are located in the flow and reflux chamber and the throttle valve closure is located in the mixing chamber.

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DK 168546 B1 IDK 168546 B1 I

Indstillingsorganet kan indstilles af et aktiveringsorgan, IThe adjusting means may be set by an actuating means, I

der kan fjernstyres. Hertil kommer især et elektrisk opvarmeligt ekspansionsstof-element, såsom en faststof-patron, fx en vokspatron, eller et med væske-damp-fyldning forsynet ar-5 bejdselement og lignende, i betragtning. Ventilanordningen behøver så ikke at være anbragt i det rum, hvis temperatur skal reguleres. Når en anbringelse i dette rum er mulig, kan der anbringes en normal termostatopsats for ventilanordningen.that can be remotely controlled. In addition, an electrically heated expansion fabric element, such as a solid-state cartridge, such as a wax cartridge, or a liquid-vapor-filled work element and the like, is also considered. The valve device then need not be located in the room whose temperature is to be controlled. When a placement in this space is possible, a normal thermostat assembly for the valve assembly may be provided.

10 Med særlig fordel er flere ventilhuse, som hver er tilsluttet en varmekreds, samlet til en af en fælles cirkulationspumpe forsynet centralfordeler. En sådan centralfordeler kan være anbragt fælles for alle rum i en lejlighed, fx i entréen. Den kan tilsluttes fremløbs- og tilbageløbsledningen i 15 et hus- eller fjernvarmeanlæg.10 With particular advantage, several valve housings, each connected to a heating circuit, are assembled into a central distributor provided with a common circulation pump. Such a central distributor may be located in common for all rooms in an apartment, for example in the entrance. It can be connected to the inlet and return lines in a domestic or district heating system.

I denne sammenhæng anbefales det, at fremløbs- og tilbageløbskammeret i hvert hus er forbundet med en mellem begge over for liggende hus-endevægge forløbende gennemgang, og blandekammeret er forbundet med en tilslutningsstuds, hvis 20 akse omtrent forløber parallelt med endevæggene. Centralfor-delerens ventilanordninger kan derfor anbringes tæt ved siden af hinanden og står umiddelbart i forbindelse med hinanden.In this connection, it is recommended that in each housing the flow and reflux chamber be connected to a passage extending between both opposite housing end walls, and the mixing chamber be connected to a connecting rod whose axis of axis extends approximately parallel to the end walls. The valve distributors of the central distributor can therefore be placed close to each other and are immediately in contact with each other.

Det tjener også samme formål, når hvert hus er forsynet med 25 en anden tilslutningsstuds, som er forbundet med en yderligere mellem hus-endevæggene forløbende gennemgang.It also serves the same purpose when each housing is provided with a different connector, which is connected to a further passage extending between the housing end walls.

Opfindelsen forklares nærmere nedenstående ved hjælp af på tegningen viste, foretrukne udførelseseksempler, der viser i fig. 1 en skematisk fremstilling af et varmeanlæg 30 med ventilanordninger ifølge opfindelsen, DK 168546 B1 4 fig. 2 et længdesnit gennem en udførelsesform af en ventilanordning ifølge opfindelsen, fig. 3 et længdesnit gennem et alternativ hertil, fig. 4 og 5 gennemstrømningskurver som funktion af ind-5 stillingsvejen, fig. 6 et længdesnit gennem en yderligere udførel sesform af en ventilanordning ifølge opfindelsen og fig. 7 et horisontalsnit langs linien A-A i fig. 6.The invention is further explained below by means of preferred embodiments shown in the drawing which are shown in FIG. 1 is a schematic representation of a heating system 30 with valve devices according to the invention; FIG. 2 is a longitudinal section through an embodiment of a valve device according to the invention; FIG. 3 is a longitudinal section through an alternative thereto; FIG. 4 and 5 flow curves as a function of the setting path; FIG. 6 is a longitudinal section through a further embodiment of a valve device according to the invention; and FIG. 7 is a horizontal section along line A-A of FIG. 6th

10 I fig. 1 er vist et varmeanlæg for et hus med flere etager.10 In FIG. 1 shows a heating system for a multi-storey house.

Det har en varmekedel 1 med fremløbsledning 2 og tilbageløbsledning 3. Hver lejlighed W1, W2, W3 osv. står i forbindelse med denne fremløbsledning 2 og tilbageløbsledningen 3.It has a heating boiler 1 with flow line 2 and return line 3. Each apartment W1, W2, W3, etc. is connected to this flow line 2 and the return line 3.

Lejligheden W1 har tre rum 4, 5 og 6, som hver har to varme-15 vekslere 7 og 8, 9 og 10, 11 og 12. Px er varmevekslerne 7, 9 og 11 i gulvet udlagte rørledninger, mens varmevekslerne 8, 10 og 12 er dannet af på rumvæggen fastgjorte konvektions-varmelegemer. Hver varmeveksler forsynes fra en ventilanordning 13 med blandevand over en ledning 14. Returlednin-20 gen 15 fører til en fællesledning 16, i hvilken der ligger en cirkulationspumpe 17. Cirkulationspumpens udgang står på den ene side i forbindelse med tilbageløbsledningen 3 og på den anden side med en tilbageløbs-fordelerledning 18, som er fælles for alle ventilanordninger 13. Samtlige ventilanord-25 ninger 13 danner til sammen en centralfordeler 19, som fx kan anbringes i lejlighedens entré, i et pulterkammer eller på et andet ellers ubenyttet sted.The apartment W1 has three rooms 4, 5 and 6, each having two heat-15 exchangers 7 and 8, 9 and 10, 11 and 12. For example, the heat exchangers 7, 9 and 11 in the floor are laid pipes, while the heat exchangers 8, 10 and 12 is formed by convection heaters attached to the space wall. Each heat exchanger is supplied from a valve assembly 13 with mixing water over a conduit 14. The return conduit 15 leads to a common conduit 16 in which is located a circulation pump 17. The outlet of the circulation pump is connected on one side to the reflux conduit 3 and on the other side. with a return distributor line 18, which is common to all valve devices 13. All valve devices 13 together form a central distributor 19, which can, for example, be placed in the apartment entrance, in a storeroom or in another otherwise unused location.

En ventilanordning 13 er vist i fig. 2. Den har et hus 20, i hvilket der findes et fremløbskammer 21, et tilbageløbskam- — i -- DK 168546 Bl 5 mer 22 og et blandekammer 23 med en tilslutningsstuds 24 for ledningen 14. Forneden er vist et kammer 25, som danner en del af fællesledningen ‘ 16 og er forsynet med en tilslutningsstuds 26 for en ledning 15.A valve assembly 13 is shown in FIG. 2. It has a housing 20 in which there is a flow chamber 21, a reflux chamber 22 and a mixing chamber 23 with a connecting plug 24 for the conduit 14. Below is shown a chamber 25 which forms a portion of the common line '16 and is provided with a connecting pin 26 for a line 15.

5 Et indstillingsorgan 27 i form af en ventilstang forløber igennem en boring 28 mellem fremløbskammer 21 og blandekammer 23 samt en boring 29 mellem tilbageløbskammer 22 og blandekammer 23. Tre lukkestykker 30, 31 og 32 kan medtages af indstillingsorganet 27. Lukkestykket 30 danner sammen med 10 et ventilsæde 33 en fødeventil 34 på tilløbssiden. Lukkestykket 31 danner med et ventilsæde 35 en fødeventil 36 på tilbageløbssiden. De to fødeventiler 34 og 36 udgør en blan-deventil M. Lukkestykket 32 danner sammen roed et ventilsæde 37 en drosselventil D. Mellem lukkestykkerne 30 og 31 er der 15 en tilbagestillingsfjeder 38. Mellem lukkestykket 32 og huset er der anbragt en tilbagestillingsfjeder 39.An adjusting member 27 in the form of a valve rod extends through a bore 28 between flow chamber 21 and mixing chamber 23 and a bore 29 between reflux chamber 22 and mixing chamber 23. Three closures 30, 31 and 32 can be included by the adjusting member 27. The closure 30 forms together with 10 a valve seat 33 and a feed valve 34 on the inlet side. The closure piece 31 forms with a valve seat 35 a feed valve 36 on the return side. The two feed valves 34 and 36 constitute a mixing valve M. The closure piece 32 together forms a valve seat 37 a throttle valve D. Between the closures 30 and 31 there is a reset spring 38. Between the closure 32 and the housing is a reset spring 39.

På huset er der påsat en aktiveringsopsats 40, som indeholder en vokspatron 41, der ved hjælp af en elektrisk varme-modstand 42 kan bringes til forudbestemte temperaturer. I 20 afhængighed af temperaturen forskydes et stempel 43 udad og indstiller ventilskaftet i en forudbestemt grad.On the housing is mounted an activating set 40 containing a wax cartridge 41 which can be brought to predetermined temperatures by means of an electric heat resistor 42. Depending on the temperature, a piston 43 is displaced outward and adjusts the valve stem to a predetermined degree.

Ved udførelsesformen i fig. 3, ved hvilken det ikke viste aktiveringsorgan arbejder i omvendt retning, anvendes for tilsvarende dele med 100 forhøjede henvisningsbetegnelser.In the embodiment of FIG. 3, in which the actuator not shown is operating in the reverse direction, is used for corresponding parts with 100 elevated reference numerals.

25 Ved denne konstruktion befinder lukkestykket 130 af fødeven-tilen 134 på fremløbssiden sig i fremløbskammeret 121 og lukkestykket 131 af fødeventilen 136 på tilbageløbssiden i tilbageløbskammeret 122. Drosselventilens D lukkestykke 132 er anbragt i blandekammeret 123.In this construction, the closure piece 130 of the feed valve 134 on the flow side is in the flow chamber 121 and the closure 131 of the feed valve 136 on the return side of the reflux chamber 122. The throttle valve 132 closure 132 is disposed in the mixing chamber 123.

30 I fig. 4 er gennemstrømningsmængden Q vist som funktion af aktiveringsorganets og indstillingsorganets 27 indstillingsvej y. Kurve I viser gennemstrømningen gennem boringen 28, DK 168546 Bl 6 altså mængden af fremløbsvandet, og kurve II viser gennemstrømningen gennem boringen 29, altså det iblandede tilbageløbsvand. Kurve III udgør summen af kurverne I og II; denne er mængden Q, som tilføres varmeveksleren over studsen 24.In FIG. 4, the flow rate Q is shown as a function of the adjustment path y of the actuator and the adjusting means 27. Curve I shows the flow through bore 28, that is, the amount of flow water, and curve II shows the flow through bore 29, ie the mixed reflux water. Curve III is the sum of curves I and II; this is the amount Q supplied to the heat exchanger over the plug 24.

5 På grund af samvirkningen mellem fødeventilen 36 på tilbageløbssiden og drosselventilen D fås en kurve II, som i begge endestillinger holder gennemstrømningsmængden på nul og i midten har et maksimum. Ved stort varmebehov fås en stor gennemstrømningsmængde, som overvejende dannes af det varme 10 fremløbsvand. På grund af den store mængde er afkølingen i varmeveksleren ringe. Ved aftagende varmebehov falder også gennemstrømningsmængden. I nærheden af den modsatte endestilling er gennemstrømningsmængden kun lille. Alligevel er temperaturfaldet i varmeveksleren lavt, fordi blandevandtem-15 peraturen ligger nær rumtemperaturen.5 Because of the interaction between the feed valve 36 on the return side and the throttle valve D, a curve II is obtained which in both end positions keeps the flow rate at zero and in the middle has a maximum. At high heat demand, a large flow rate is obtained, which is predominantly formed by the hot 10 flow water. Due to the large amount, the cooling in the heat exchanger is poor. When the demand for heat decreases, the flow rate also decreases. Near the opposite end position, the flow rate is only small. Still, the temperature drop in the heat exchanger is low because the mixing water temperature is close to room temperature.

I modsætning til sædvanlige rumradiator-ventiler har den her beskrevne ventilanordning en konstant forstærkning, hvad der betyder, at med tiltagende indstillingsvej y tiltager også den overførte varmemængde kontinuerligt.Contrary to conventional room radiator valves, the valve assembly described herein has a constant gain, which means that with increasing setting path y, the transmitted heat quantity also increases continuously.

20 Ved hjælp af lukkestykkernes sammenkobling og/eller ved hjælp af deres form i forbindelse med ventilsædet kan kurverne I og II i stort omfang vælges frit. Fig. 5 viser det tilfælde, at fødeventilen 34 på fremløbssiden først åbner efter en vis indstillingsvej af indstillingsorganet 27 (kur-25 ve la). Derfor bestrides den nedre del af gennemstrømningskurven Illa alene af tilbageløbsvandet, som man kan se af formen af kurven Ila.20 By means of the coupling of the closures and / or by their shape in connection with the valve seat, curves I and II can to a large extent be freely chosen. FIG. 5 shows the case that the supply valve 34 on the supply side only opens after a certain adjustment path of the adjustment means 27 (curve 25a). Therefore, the lower part of the flow curve Illa is contested only by the reflux water, as can be seen from the shape of the curve Ila.

Ved udførelsesformen i fig. 6 benyttes for tilsvarende dele med 200 i forhold til fig. 2 forhøjede henvisningsbetegnel-30 ser. Ventilstangen og lukkestykkerne er ikke indtegnet. Fremløbskammeret 221 er forbundet med en gennemgang 202, tilbageløbskammeret 222 med en gennemgang 218 og kammeret 225 med en gennemgang 216. De tre gennemgange strækker sig DK 168546 B1 7 på over for liggende endevægge 244 og 245. Sådanne ventilhuse 213 kan derfor under mellemlag af en tætning sættes sammen med hinanden og forbindes ved hjælp af skruer, som griber gennem boringer 246. På grund af kamrenes 221 - 223 skrå 5 akse er den ikke viste aktiveringsopsats let tilgængelig.In the embodiment of FIG. 6 is used for corresponding parts having 200 relative to FIG. 2 elevated reference numerals 30. The valve stem and closures are not plotted. The flow chamber 221 is connected to a passage 202, the reflux chamber 222 to a passage 218 and the chamber 225 to a passage 216. The three passageways extend to opposite end walls 244 and 245. Such valve housings 213 may therefore under seal is joined together and connected by screws which pass through bores 246. Due to the axis 5 of the chambers 221 - 223, the actuation arrangement not shown is readily available.

Claims

A valve assembly for a hot water heating system, especially with underfloor heating, with a mixing valve (M) having two of the common adjusting means (27; 127) in opposite directions for actuating feed valves (34, 36; 134, 136) for supply. a mixing chamber (23; 123; 223) from a flow chamber (21; 121; 221) and a reflux chamber (22; 122; 222), characterized in that in series with the feed valve (36; 136) on the reflux side, arranged a throttle valve (D) which can be adjusted by the common adjusting means (27; 127) in the opposite direction of this feed valve on the return side.

Valve assembly according to claim 1, characterized in that the adjusting means (27; 127) is a valve shaft which, in addition to the feed valve closures (30, 31; 15, 130, 131), carries a throttle valve closure (32; 132) and between reflux chamber (22; 122) and mixing chamber (23; 123) on both sides has a valve seat (35, 37).

Valve assembly according to claim 2, characterized in that the feed valve closures (30, 31) are disposed in the mixing chamber (23) and the throttle valve closure (32) is arranged in the reflux chamber (22).

Valve assembly according to claim 2, characterized in that the feed valve closure (130, 131) is disposed in the flow and return chamber (121, 122) and the throttle valve closure (132) is arranged in the mixing chamber (123).

Valve device according to claims 1-4, characterized in that the adjusting means (27) can be adjusted by a remote control actuating means (41). DK 168546 B1 9

Valve device according to claim 5, characterized in that an electrically heated expansion fabric element serves as actuating means (41).

Valve assembly according to claims 1-6, characterized in that a plurality of valve housings (13; 213), each connected to a heating circuit (7 - 12), are assembled into a central distributor (7) provided with a common circulation pump (17). 19).

Valve device according to claim 7, characterized in that the oath and the return chamber (221, 222) in each housing (213) are connected to a passage (202, which extends between both opposite housing end walls (244, 245)). 218) and the mixing chamber (223) is connected to a connecting rod (224) whose axis extends approximately 15 parallel to the end walls.

Valve assembly according to claim 8, characterized in that each housing (213) is provided with a second connecting rod (226) which is connected to a further passage (216) extending between the housing end walls (244, 245).