ES2654591T3 - Stove - Google Patents

Abstract

Stove (10), comprising a combustion chamber (40) and a valve assembly (60) to regulate the flow of air to the combustion chamber (40), in which the valve assembly (60) comprises a closure Valve (68, 70) for closing a valve opening of the stove and a rotating control means (26) for raising the valve closure (68, 70) towards the valve opening and lowering the valve closure (68, 70) away from the valve opening, in which the rotating control means (26) is positioned such that it is lowered with respect to a stove housing (10), and said stove (10) further comprises means concealment (38) to hide the rotating control means (26), characterized in that the stove further comprises: a door (16) of the stove (10) provided with a cut-out section (24) to house the control means ( 26) rotating; retention means for fixing the door (16) in its closed position, the retention means comprising a rod (32) which is rotatably mounted in part of the door (16) and having a coupling formation that is configured to engage with a complementary reception formation arranged in part of the stove that is located next to the rod when the door (16) is closed, the retention means also comprising a lever (36) that is coupled with the rod (32) and can be displaced to cause rotation of the rod (32); and wherein the concealment means comprise a panel (38) disposed on the lever (36), panel (38) that is configured to be received in the cut-out section (24) of the door (16).

Description

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DESCRIPTION

Stove

Technical sector

The present invention relates to a stove and, in particular, to a built-in stove for burning solid fuel, such as logs.

Background of the invention

Stoves that burn solid fuel, such as logs, have long been popular for use in domestic homes due to their heating and aesthetic qualities. A common type of solid fuel combustion stove is known as a built-in stove, since it is received in an opening in a wall, so that its front housing is flush or protrudes only a small distance from the wall surface in the one that receives the built-in stove.

Stoves of this type include a combustion chamber or home where fuel is received, such as logs. A door provides access to the home, which has an outlet from the chimney shot through which smoke and other combustion products are expelled outside the stove, usually through a shot from the chimney arranged in the building in the that the stove is installed.

The stove is equipped with ventilation holes or air inlets through which external air can be introduced into the home to control the combustion rate of the fuel. Usually, these ventilation holes are arranged towards a front surface of the stove and have a slotted grill, behind which a gate plate is slidably mounted. A lever is attached to the gate plate to allow the gate plate to move to partially cover or cover the slots in the grill, preventing or restricting the flow of air through the grill slots towards the home.

Ventilation holes of this type can be difficult to operate precisely, due to the difficulty of manually moving the gate plate to a precise position where the desired air flow is achieved. In addition, since it may be difficult to repeatedly achieve a particular air flow configuration due to the difficulty of manually moving the damper to exactly the same position it had previously occupied, repeatability is a problem in stoves with ventilation holes of this type. In addition, the lever that controls the gate plate usually protrudes outward from the front housing of the stove, which can be unsightly and, therefore, can have a negative aesthetic effect on the stove, in particular when the stove is a built-in stove that is designed to have a substantially flat housing.

The U.S.A. 2005/194002 discloses an air bypass system for use with a heating apparatus that includes an exterior enclosure and a combustion chamber enclosure located inside the exterior enclosure. The bypass system includes a first opening that provides an air passage between an air source in a remote location and a defined air gap between the outer enclosure and the combustion chamber enclosure. The bypass system also includes a second opening that provides an air passage between an ambient air source and the air space, and an actuating element configured to move between a first position substantially covering the first opening in which the second opening is open for air flow, and a second position substantially covering the second opening in which the first opening is open for air flow.

The U.S.A. 4313418 discloses a damper control system in which a control screw is threadedly mounted on a door and engages with a dependent contact arm in a damper to move the damper between a closed position and several open positions.

Document DE 202008004505 refers to a wood stove with a combustion chamber surrounded by a series of walls, at least one of which comprises a door with an observation window.

EP 1411299 discloses a chimney comprising several access points, a combustion chamber that can be closed and at least one window unit with multiple windows.

WO2010 / 108111 discloses a chimney assembly with an integrated combustion control that can be used in combination with gas fireplaces, stoves and built-in fireplaces.

The chimney assembly includes: a control panel; a concealment door that hides the control panel when the concealment door is closed; automatic illumination of the control panel that is activated when the concealment door is open; a split-flow or double-burner assembly that simulates a natural wood burning fire; and an intermittent pilot ignition system that allows a pilot flame to function so

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Continuous or intermittent. Characteristics of the invention.

The present invention discloses a stove, according to the appended claims.

The use of rotary control means in the oven of the present invention allows greater precision and repeatability in the positioning of the valve seal than in prior art stoves, since the rotary control means can be easily configured to a previously used configuration, in which the valve seal is positioned to achieve a desired air flow, while the lowered position of the rotating control means with respect to the housing, and the concealment means allow the means of Rotary controls are hidden to improve the aesthetic appeal of the stove.

Brief description of the drawings

Embodiments of the invention will now be described, strictly by way of example only, with reference to the accompanying drawings, in which:

Figure 1 is a perspective view of an oven according to an embodiment of the present invention;

Figure 2 is a schematic representation of a retainer mechanism for retaining a stove door of the

Figure 1 in a closed position;

Figure 3 is a view of the front of the stove of Figure 1;

Figure 4 is a schematic cross-sectional view, taken from one side of the stove of Figure 1;

Figure 5 is a schematic representation, in perspective, of a valve assembly used in the stove of the

Figures 1 and 3;

Figure 6 is a perspective view, with the parts removed, of the valve assembly shown in Figure 5; Y

Figures 7 to 10 are schematic cross-sectional views of the valve assembly shown in Figures 5 and 6, showing the operation of the valve assembly.

Description of the realizations

Referring first to Figure 1, a stove is shown in general at -10-. The stove shown in Figure 1 is a built-in stove that is intended to be received in an opening in a wall of a building such as a domestic dwelling. The stove -10- has a frame -12-, whose back side stops against the wall around the opening when the stove -10- is installed, so that the front face of the frame -12- is facing away from the wall .

The frame -12- is connected to a stove body -14- that extends backwards with respect to the frame -12- and, when the stove -10- is installed, it is received in the opening of the wall. A door -16- is coupled to the body -14- of the stove by means of a hinge -18-, and opens to allow access to the interior of the stove -10-. In this example, the door -16- takes the form of a frame -20- of a metallic material surrounding a panel -22- of tempered glass or other heat-resistant material to allow visual access to the interior of the stove - 10-. The frame -20- of the door -16- is provided with a section cut -24- to accommodate the rotary control knobs -26- of a stove valve assembly -10-, which are positioned in such a way which are lowered with respect to the stove housing -10- (which in this example is provided by the door -16-), such that these can be hidden to provide a substantially flat housing in order to improve the attractiveness aesthetic of the stove -10-.

The door -16- includes retention means to fix it in its closed position. As shown in Figure 2, the retaining means -30- in this example comprise a rod -32- which is rotatably mounted on the opposite side of the door -16- with respect to the hinge -18-. The rod -32- includes a retainer formation in the form of a hook -34- that extends outward from the rod and is configured to engage with a complementary reception formation in a part of the stove -10- such as the frame -12- or the body -14- of the stove -10-, which is positioned next to the rod -32- when the door -16- is closed, to retain the door -16- in its closed position. A lower end of the rod -32- is received in a tubular element from which a lever -36- extends, in a direction generally opposite to the direction of the seal formation -34-. When the door -16- is closed, the lever -36- extends laterally from the rod -32- under the frame -20- of the door, so that the lever does not protrude outward beyond the leaf of the frame -20- of the door -16-. The lever -36- ends in a panel -38- which, when the door -16- is closed, is received in the section

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trimmed -24- of the frame -20- and is substantially flush with the frame -20- of the door -16- to hide the rotary control knobs -26- of the stove -10-. A rear side of the panel -38- is provided with a flange that can be received by a spring latch arranged, in this example, in a position between the rotary control knobs -26-, but which can be arranged in the frame -20- of the door -16- or in any appropriate position in the body -14- of the stove, to keep the panel -38- in position and thus prevent the movement of the lever -32- and the opening from the door -16-.

Figure 3 shows the stove -10- with the door -16- closed, where it can be seen that when the door is closed the panel -38- hides the rotary control knobs -26-. Thus, with the door -16- closed, the stove -10- has a substantially flat housing.

To open the door -16-, the panel -38- is pressed to release the spring latch, allowing the movement of the panel -38- and the lever -36-. Next, the lever -36- is swung out of the frame -12- of the stove -10-. The lever -36- is free to rotate a predefined angle without causing the rod -32- to rotate, to allow access to the rotary control knobs -26- without releasing the seal formation -34- from its coupling with Complementary reception training. In this example, the angle is approximately 60 degrees, since this makes the lever -36- and the panel -38- move sufficiently far from the frame -12- of the stove to allow adequate space to access the rotary control knobs -26-. It will be appreciated that any rotation angle that achieves this could also be used.

Once the lever -36- has rotated an angle greater than the predefined angle, for example, an angle greater than 60 degrees, the tubular element engages with the rod -32-, causing the rod -32- to rotate, which in turn causes the seal formation -34- to be disengaged from the complementary reception formation. Once the seal formation -34- has been completely disengaged from the reception formation, the door -16- can be opened to allow access to the interior of the stove -10-.

Figure 4 is a schematic cross-sectional view, taken from one side of the stove -10-. As can be seen from Figure 4, the stove -10- includes a combustion chamber or household -40-, which is positioned to be visible through the panel -22- of the door -16- when the door -16- is closed. An outlet -42- of the chimney draft is arranged in an upper part of the home -40- to allow smoke and other combustion products to be evacuated outside the stove -10-, usually through a chimney draft arranged in the building where the stove is installed. A rear wall -44- of the home -40- is provided, towards an upper part, with a first air inlet -46-, and towards a lower part, with a second air inlet -48-. The first air inlet -46- communicates with a first duct -50- that receives air from the outside of the stove -10-, while the second air inlet -48- communicates with a second duct -52- that receives air from the outside of the stove -10-. The first conduit -50- contains a first valve that is controlled by one of the rotary control knobs -26-, and the second conduit -52- contains a second valve that is controlled by the other of the control knobs. -26- rotary control, as described in detail below.

The stove -10- includes a valve assembly -60- that controls the air flow to the first and second air inlets -46-, -48- of the home -40-. The valve assembly is arranged as a removable cartridge -62- that fits into the stove body -14- below the hearth -40-, as shown in Figure 4. This arrangement is advantageous since it facilitates maintenance or the replacement of the valve assembly -60-, since the cartridge -62- can simply slide out of the body -14- of the stove without disassembling the stove -10-.

Figure 5 is a schematic representation, in perspective, of the valve assembly -60-. As can be seen in Figure 5, the valve assembly includes a control housing -64- in which the rotary control knobs -26- are mounted. The control housing -64- is connected to a frame -66- of the valve in which the first and second valve closures -68-, -70- are received. The first and second valve seals -68-, -70- each have a valve seal -72- that seals an opening in the first or second duct -50-, -52- securely when the valve seals -68-, -70- are raised to a position where they are completely coupled with the opening, to close the opening and prevent air flow to the first and second air inlets -46-, -48-. Mechanical connections containing control screws, push rods and rocker arms connect the valve seals -68-, -70- to the rotary control knobs -26-, so that the rotation of the control knobs -26- rotary control up or down the valve openings -68-, -70- to regulate the air flow to the first and second air inlets -46-, -48-, as will be described below with reference to figures 6 to 11 of the drawings.

The perspective view, with the parts removed, of figure 6 shows the arrangement that joins one of the control knobs -26- rotating to the first valve closure -68-, but it should be appreciated that the arrangement that joins the Another control command -26- to the second valve closure -70- is identical in its construction and operation, except that it is a mirror image of the arrangement shown in Figure 6, as can be seen in Figure 5.

As can be seen in figure 6, the rotary control knob -26- is mounted on a control screw

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-74- threaded through an opening in the control housing -64- and a coaxial threaded opening in a threaded block -76- which is arranged immediately behind the control housing -64-. The control knob -26- is fixed to the control screw -74- by means of a captive screw -78-. A compression spring -80- is mounted on the control screw -74- and is supported at one end against a washer -82- that is retained by a pin -83- that passes through the control screw -74- and at the other end against the threaded block -76- to press the control screw -74- towards an extended position.

The thread of the opening in the threaded block -76- is complementary to the thread of the control screw -74-, so that when the control screw -74- is rotated by counterclockwise rotation of the control knob - 26-, a free distal end -84- of the control screw -74- extends linearly away from the threaded block -76 and, when the control screw -74- turns clockwise, the free distal end -84- of the screw control -74- retracts linearly towards the threaded block -76-. The inter-coupling of the threads of the control screw -74- and the opening of the threaded block -76- also act to keep the control screw -74- in position, and therefore the control knob -26-, when rotation of the control knob -26- ceases.

The distal end -84- free of the control screw is supported against a free end -86- of a pushrod -88-, which passes through an opening -90- on a front plate -92- of the frame -66 - from valvule. The frame -66- of the valve has two side plates -94- that are substantially parallel to each other and that have fixing lugs -96- that are substantially perpendicular to the side plates -92-, such that when the side plates -94- are coupled to the front plate -92- by means of the fixing lugs -96-, the side plates -94- are substantially perpendicular to the front plate -94-. The frame -66- of the valve also has a floor plate -97- that extends between the side plates -94-. A tongue -98- extends outwardly from a rear edge of the floor plate -97-. The tongue -98- is elastically forced downwards and, when the valve assembly -60- is received in the stove -10-, it is coupled with a stove base plate to push the upper part of the frame -66- from the valve to a plate on which duct air inlets -50-, -52- are arranged to securely hold the valve housing -66- in the correct position with respect to the air inlets of the ducts -50-, -52-. The tongue -98- also has a side effect that prevents movement of the valve assembly -60- with respect to the stove -10-, but does not prevent the removal of the valve assembly -60- from the stove if a force is applied enough to remove the valve assembly -60- from the stove -10-.

A first pair of mounting holes -100- are arranged in a front part of each of the side plates -94- to receive a substantially cylindrical bell crankshaft -102-. The first mounting holes -100- of the side plates -94- are aligned, so that when rocker arms -102- are received in the first mounting holes -100-, their longitudinal axis is substantially parallel to the front plate -92 - of the frame -66- of the valve. A second pair of mounting holes -104- are arranged at a rear of each of the side plates to receive a substantially cylindrical valve shaft -106. The second holes are aligned in such a way that when the valve shaft -106- is received in the second holes -106-, its longitudinal axis is substantially parallel to the front plate -92- and the longitudinal axis of the bell crankshaft -102 -.

A rocker -108- is attached to an outer surface of one end of the hollow tubular element -110- generally cylindrical, which is rotatably mounted on the bell crankshaft -102-, such that when the bell crankshaft -102 - and the tubular element -110- are installed in the frame -60- of the valve the rocker -108- is located next to one of the side plates -94- and can rotate around the bell crankshaft -102-.

The rocker -108- has a first arm -111- in general flat that acts as a coupling part. A hole or recess is provided in the first arm -111- to retain a distal end of the pushrod -88-. One side of a free end of the first arm -111- is attached to the outer surface of the end of the tubular element -110-. A second arm -112- extends outward from the first arm -111- in a general direction perpendicular to the first arm -111-, such that in the normal use of the valve assembly -60- the second arm -112 - extends towards a rear of the valve assembly -60-. A distal end part -114- of the second arm -112- is inclined upwards with respect to the second arm -112-, and a rod -116- in general cylindrical is mounted on the distal end part -114- of the second arm -112 - which extends in a general direction perpendicular to the second arm -112-, such that a longitudinal axis of the rod -116- is substantially parallel to those of the bell crankshaft -102- and the shaft -106-.de The valve

The first valve closure -68- has a first and a second side plates -118- which are arranged in a substantially parallel separate configuration, being joined together by an upper plate -120-. The first and second side plates -118- are each provided with a notch -122- in a front part of the first and second side plates -118- and, when the first valve closure -68- is mounted, these notches - 122- are aligned in such a way that the first valve closure -68- can be rotatably mounted on the valve shaft -106- upon receiving the valve shaft -106- in the notches -122- aligned. A weight -124- of the valve is attached to a lower side of the upper plate -120- in a position between the notches -122- and a rear edge -126- of the upper plate -120-, and the valve seal -72- is arranged on an upper surface of the upper plate -120-.

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When the valve assembly -60- is mounted, the first valve closure -68- is mounted on the valve shaft -106-, and the valve weight -124 causes the valve closure -68- to rotate in the direction schedule until the bottom of the upper plate -120- leans against the rod -116-. Therefore, in a normal operation of the valve assembly, the first valve closure -68- is supported by the valve shaft -106- and by the rod -116-.

Next, the operation of the valve assembly -60- will be described with reference to figures 7 to 10 of the drawings, which are seen, in cross section, of the valve assembly -60- with the valves in different positions corresponding to different configurations of the air flow.

Figure 7 shows the valve assembly -60- with the first valve closure -68- in a fully open position. In this position, the valve closure -68- rests on a stop -130- of the valve assembly -60-.

The rotation of the control knob -26- counterclockwise causes the control screw -74- to move towards the valve closure -68-, which in turn causes the pushrod -88- to extend. The distal end of the pushrod -88-, which rests against the first arm -111- of the rocker -108-, causes the rocker -108- to rotate around the bell crankshaft -102-. The second arm -112- of the rocker -108- turns, therefore, counterclockwise, as shown by arrow -132- of Figure 8, and the magnitude of the rotation of the second arm -112- is much greater than the magnitude of the movement of the pushrod -88-, that is, the rocker -108- amplifies the movement of the pushrod -88-. The rod -116- mounted on the part of the distal end of the second arm -112- moves with the second arm -112-, and since the lower part of the upper plate -120- of the valve closure -68- is supported against the rod -116, this causes the valve closure -68- to pivot around the valve shaft -106-. The position of the valve weight -124- between the notches -122- and the rear edge -126- of the upper plate -120- ensures that the rear edge -126- of the upper plate -120- is lifted before the edge front of the upper plate -120-. This has advantageous effects, which are described below.

When the rear edge -126- of the upper plate -120- comes into contact with the area around the opening in the duct -50-, -52- the rotation of the valve closure -68- around the shaft -106- of valve is no longer possible, and the valve closure -68- begins to pivot around the point of contact between the upper plate -120- and the area around the opening, as indicated by arrow -134- in the figure 9, raising the leading edge of the upper plate -120-. An additional movement of the control knob counterclockwise -26- causes this movement to continue until the valve closure -68- is fully seated and the valve seal -72- seals the opening to close the valve and prevent the air flow through the opening, as shown in figure 10.

The rotation of the control knob is limited by a first pin -136- that passes through the control screw -74- and interacts with a second pin -138- that extends backwards with respect to the threaded block -76-. The first pin -138- acts as a stop to limit the rotation of the control screw -74- in any direction. The length and position of the first and second pins -136-, -138- are selected so that the degree of rotation allowed by the first and second pins -136-, -138- that interact ensures that the valve closure -68 - have enough travel to be fully seated (closed) and completely open with enough tolerance to accept slight variations in the dimensions of the stove.

Claims (14)

5 10 fifteen twenty 25 30 35 40 Four. Five fifty 55 60 65 1. Stove (10), comprising a combustion chamber (40) and a valve assembly (60) to regulate the air flow to the combustion chamber (40), in which the valve assembly (60) comprises a valve closure (68, 70) to close a valve opening of the stove and a rotating control means (26) to raise the valve closure (68, 70) towards the valve opening and lower the valve closure ( 68, 70) away from the valve opening, in which the rotating control means (26) is positioned such that it is lowered with respect to a stove housing (10), and said stove (10) further comprises concealment means (38) to hide the rotating control means (26), characterized in that the stove further comprises: a door (16) of the stove (10) provided with a cut-out section (24) to house the rotating control means (26); retention means for fixing the door (16) in its closed position, the retention means comprising a rod (32) that is rotatably mounted in part of the door (16) and having a coupling formation that is configured to engage with a complementary reception formation arranged in part of the stove that is located next to the rod when the door (16) is closed, the retention means also comprising a lever (36) that is coupled with the rod (32) and can be displaced to cause rotation of the rod (32); and wherein the concealment means comprise a panel (38) disposed on the lever (36), panel (38) that is configured to be received in the cut-out section (24) of the door (16). 2. Stove according to claim 1, wherein the lever (36) can freely rotate a predetermined angle without engaging with the rod (32), such that during the rotation of the lever (36) along the predetermined angle , the rod (32) does not rotate. 3. Stove according to claim 2, wherein the predetermined angle is approximately 60 degrees. 4. Stove according to claim 1, wherein the panel (38) is provided with retaining means for retaining the panel (38) in position and restricting the movement of the lever (36). A stove according to any one of the preceding claims, wherein the valve assembly (60) comprises a mechanical connection that connects the rotating control means (26) with the valve closure (68, 70). A stove according to claim 5, wherein the mechanical joint comprises a control screw (74) that is fixed to the rotating control means (26) for a rotary movement therewith, the control screw (74) having a free end that abuts against a free end of a push rod (88), the push rod (88) having a free distal end that engages with a first arm of a rocker arm (108) pivotally mounted having a second arm acting on the closing of the valve (68, 70) such that the rotation of the rotating control means (26) causes the pivoting movement of the rocker arm (108) and, therefore, the closing movement of the valve (68, 70). A stove according to claim 5, wherein the valve closure (68, 70) is provided with notches (122) aligned in front of the side plates of the valve closure (68, 70) by means of which The valve seal (68, 70) is mounted on a valve shaft (106) so that the movement of the rocker (108) causes a pivotal movement of the valve seal (68, 70) around the valve shaft (106) . A stove according to claim 7, wherein the valve closure (68, 70) is provided with a weight (124) that is located between the notches (122) and a rear part of the valve closure (68, 70 ). A stove according to claim 7 or claim 8, in which a rod is mounted on a distal end of the second rocker arm (108) for coupling with a lower face of an upper plate of the valve closure (68, 70), such that if the pivoting movement of the valve seal (68, 70) around the valve shaft (106) is impeded by contact between the back of the valve seal (68,70) and an object, an additional movement of the rocker arm (108) causes the valve seal (68, 70) to pivot around a point of contact between the rear of the valve seal (68, 70) and the object. A stove according to any one of the preceding claims, in which the valve seal (68, 70) is provided with a valve seal (72). 11. Stove according to any of the preceding claims, wherein the valve assembly comprises a stop means for limiting the degree of rotation of the rotating control means (26). A stove according to claim 11, wherein the stop means comprises a first pin (136) projecting from a part of the valve assembly to engage with a second pin (138) that is associated with the control means ( 26) rotating. 13. Stove according to any one of the preceding claims, wherein the valve assembly is provided with an elastic tongue to force the valve assembly into a position in which the valve seal (68, 70) is positioned correctly with respect to the valve openings of the stove (10). 14. Stove according to any of the preceding claims, wherein the valve assembly is arranged as a removable cartridge (62). 5