JP4451303B2 - Recessed wall heater - Google Patents

Description

  The present invention relates to a wall-embedded heater arranged so as to be embedded in a recess formed in a chamber wall.

  Conventionally, as this type of wall-embedded heater, an outer case, a combustion housing with a burner provided in the outer case, a heat exchanger in the outer case for flowing combustion exhaust from the combustion housing, and an outer case A hot air heater equipped with an established air intake and air blower, and a hot air fan in the outer case that sucks room air through the air intake and blows it into the room through the heat exchanger arrangement There is known one that can be obtained by performing (see, for example, Patent Document 1).

By the way, in such a heater with a warm air heating function, when the power outlet is cut off during operation and the power is cut off and the hot air fan stops, the combustion housing does not stop even if the combustion of the burner is stopped. The temperature inside the outer case rises due to heat dissipation from the etc. In this case, the hot air in the outer case escapes from the air intake port to the outside. Here, a filter is generally attached to the air intake port in order to prevent dust from entering the outer case. If the filter is clogged, hot air cannot escape to the outside. In ordinary floor-standing heaters, even if clogging of the filter prevents the escape of hot air from the air intake, heat is released through the outer case, so the temperature inside the outer case rises excessively. do not do. However, in the wall-embedded heater, the outer case is surrounded by the wall of the room, and heat dissipation through the outer case is limited. There is a possibility that the temperature in the outer case becomes considerably high and heat loss of the electronic control unit or the like disposed in the outer case may occur.
Japanese Utility Model Publication 5-37129

  In view of the above, it is an object of the present invention to provide a wall-embedded heater that can prevent the temperature in the outer case from excessively rising when the power is turned off during operation. Yes.

In order to solve the above problems, the present invention is a wall-embedded heater disposed so as to be embedded in a recess formed in a chamber wall, and includes a combustion that incorporates an outer case and a burner provided in the outer case. A housing, a heat exchanger in the outer case for flowing combustion exhaust from the combustion housing, an air intake opening and an air blowing opening established in the outer case, a filter covering the air intake opening, and sucking room air from the air intake opening, In the one provided with the hot air fan in the outer case that blows air into the room from the air outlet through the arrangement part of the heat exchanger, the outer case opened on the front upper surface of the outer case exposed to the front of the room wall The outer case includes a vent hole that communicates between the inside and the outside, an openable / closable lid member provided in the vent hole, and a thermal member that opens and closes the lid member and is deformed by heat provided in an upper portion of the outer case. When the temperature inside rises Wherein the lid member in the deformation of the is configured to be opened.

  According to the above configuration, when the power is turned off during operation of the heater, the hot air fan is stopped, and the temperature in the outer case rises, the lid member is opened by deformation of the thermal member, Hot air escapes through the vents. Therefore, even if clogging of the filter attached to the air intake port prevents the escape of hot air from the air intake port, the temperature in the outer case can be prevented from rising excessively. Further, the lid member is normally closed, and dust does not enter the outer case from the vent. Note that if a filter is installed in the vent to prevent dust from entering, when the temperature inside the outer case rises, there is a possibility that hot air cannot escape due to clogging of the filter. Does not occur.

  Further, it is desirable that a spring for biasing the lid member to the closed position is provided, and the lid member is configured to be pushed and moved to the open position against the biasing force of the spring due to deformation due to a temperature rise of the thermal member. . According to this, it is possible to prevent the cover member from rattling due to the vibration of the body during the operation of the heater, and the generation of abnormal noise due to the backlash of the cover member can be prevented.

  Hereinafter, an embodiment in which the present invention is applied to a wall-embedded fireplace heater will be described. As shown in FIGS. 1 to 4, the heater includes an outer case 1 and a combustion housing 2 provided in the outer case 1. The outer case 1 includes a bottom plate 1a, left and right side plates 1b, a back plate 1c, an upper plate 1d, a front panel 1e, and an extension case 1f attached to the left side of the back of the back plate 1c. It consists of and. As shown in FIG. 4, the outer case 1 is installed so as to be embedded in a recess Wa formed in the chamber wall W, and only the front portion of the outer case 1 is exposed in front of the chamber wall W.

  A burner 3 is disposed in the lower part of the combustion housing 2. In addition, a burner support plate 2a in which an opening for fitting the upper end of the burner 3 is formed is disposed in the combustion housing 2. On the burner support plate 2a, a dummy rod 4 formed of a refractory material such as ceramics is disposed. is doing. A glass plate 2b is mounted on the front surface of the combustion casing 2, and a window portion 1g is provided on the front panel 1e of the outer case 1 so that the glass plate 2b can be faced. Thus, the inside of the combustion housing 2 can be visually observed from the front of the front panel 1e, and when the burner 3 is burned, a visual impression can be given as if the soot 4 is burning. The front panel 1e can be formed so that the peripheral edge of the window portion 1g is in close contact with the front peripheral edge of the combustion housing 2, but in this embodiment, the window portion 1g is the front of the combustion housing 2. A front panel 1e is formed so as to be slightly separated from the window 1g, and a window glass 1h is attached to the window 1g. In addition, an air supply duct 5 is connected to the bottom surface of the combustion housing 2, and outdoor air is forcibly supplied into the combustion housing 2 through the air supply duct 5 by a suction force of an exhaust fan 14 described later. .

  A heat exchanger 6 is disposed in the outer case 1 so as to be positioned on the rear side of the combustion housing 2 and into which combustion exhaust gas from the combustion housing 2 flows through the communication pipe 6a. And while opening the air intake port 7 and the ventilation port 8 in the outer case 1, indoor air is sucked in from the air intake port 7 in the outer case 1, and from the ventilation port 8 via the arrangement part of the heat exchanger 6 A hot air fan 9 for blowing air is arranged in the room so that a hot air heating function can be obtained. Here, in order to improve the heating efficiency, it is desired that the warm air is blown out at a position close to the floor surface. Therefore, in the present embodiment, the air blowing port 8 is opened in the longitudinal direction in the lower part of the window 1g of the front panel 1e of the outer case 1. Further, a warm air fan 9 is disposed in the upper space of the combustion housing 2 in order to ensure the cooling performance of the upper space of the combustion housing 2 in the outer case 1 where the temperature is likely to rise. The room air from the air intake port 7 sucked into the hot air fan 9 is blown to the air blowing port 8 via the arrangement portion of the heat exchanger 6 and the space below the combustion housing 2. In addition, partition plates 2c and 2c reaching the bottom plate portion 1a and the back plate portion 1c of the outer case 1 are disposed on the left and right outer sides of the combustion housing 2, and air blown from the hot air fan 9 is laterally transmitted. The two partition plates 2c and 2c can prevent escape. A guide plate 2 d that guides the air that has passed through the arrangement portion of the heat exchanger 6 to the air blowing port 8 is disposed below the combustion housing 2.

  In the outer case 1, a side space 10 on one side (right side) in the lateral direction between the combustion housing 2 (a partition plate 2 c on the right side of the combustion housing 2 and a side plate portion 1 b on the right side of the outer case 1 is further provided. The control device including the electronic control unit 11 and the valve unit 12 for the burner 3 is arranged in the space between the combustion chamber 2 and the side space 13 on the other side in the lateral direction (left side) between the combustion housing 2. In the space between the left partition plate 2c of the combustion housing 2 and the left side plate portion 1b of the outer case 1, the exhaust fan 14 in the extension case 1f is disposed downstream of the heat exchanger 6 (see FIG. 2). An exhaust duct 15 connected via the is disposed. In this case, the temperature of the electronic control unit 11 and the valve unit 12 may rise due to heat from the combustion housing 2 and cause heat loss, and the temperature of the left side space 13 may increase the heat from the combustion housing 2. The heat from the exhaust duct 15 may increase, and the chamber wall W may be overheated.

  Therefore, in the present embodiment, the air intake port 7 is provided in the longitudinal direction in the vertical direction so that the left and right side plate portions 1b of the outer case 1 are positioned in the front portion exposed in front of the chamber wall W. Thus, the side spaces 10 and 13 in the outer case 1 serve as a ventilation path on the suction side that guides the indoor air from the air intakes 7 to the hot air fan 9, and is wide in the vertical direction of the side spaces 10 and 13. The room air flows over this, and the side spaces 10 and 13 are effectively air-cooled by this air flow. Accordingly, it is possible to reliably prevent the chamber wall W from being overheated due to the temperature rise of the side spaces 10 and 13 and the heat loss of the electronic control unit 11 and the valve unit 12.

  As shown in FIG. 5, a filter 7a covering the air intake 7 is detachably attached to an opening of the side plate portion 1b of the outer case 1 and a louver member 7b covering the filter 7a is provided. It is attached so that it can be opened and closed by a hinge 7c at one of the front and rear edges, for example, the rear edge. Thus, intrusion of dust from the air intake port 7 is prevented, and the filter 7a is always blindfolded by the louver member 7b, and the appearance is kept good. Moreover, by opening the louver member 7b, the filter 7a can be removed and cleaned, and the maintainability is also improved.

  Also, in at least one side space, for example, the right side space 10, as shown in FIG. 3, the temperature of the indoor air that is located near the lower end of the air intake 7 and is sucked from the air intake 7. A temperature sensor 16 for detecting the above is disposed. Here, when the air outlet 8 is opened at the lower part of the front panel 1e of the outer case 1 as described above, an object (obstacle) that obstructs the forward flow of warm air is placed in the vicinity of the front surface of the heater. There is a risk of overheating obstacles and overheating the floor. When the hot air hits an obstacle, part of the hot air flows over the obstacle and flows upward, but the warm air near the floor is diverted sideways, and a part of the hot air is short-circuited to form the outer case 1. It is sucked in from the lower part of the air intake port 7 established in the side plate part 1b. And the detected temperature of the temperature sensor 16 rises significantly by such a short circuit of warm air. As a result, when an obstacle is placed in the vicinity of the front surface of the heater, this can be detected by a change in the temperature detected by the temperature sensor 16, and the amount of combustion of the burner 3 is reduced or the burner 3 is extinguished to obstruct the obstacle. And overheating of the floor surface can be prevented.

  As shown in FIG. 2, the left side space 13 in the outer case 1 is partitioned by a partition plate 13 c into a lower space 13 a below the exhaust duct 15 and an upper space 13 b in which the exhaust duct 15 is disposed. . And the air guide path 17 which guides the air which flowed into the lower space 13a to the upper space 13b via the arrangement | positioning part of the fan motor 14a for the exhaust fan 14 arrange | positioned in the extension case 1f is provided. The air guide path 17 includes a first ventilation port 17a facing a lower space 13a formed in the back plate portion 1c of the outer case 1, and an extension case 1f that guides air from the first ventilation port 17a to an arrangement portion of the fan motor 14a. The air guide member 17b and the second ventilation port 17c facing the upper space 13b formed in the back plate portion 1c of the outer case 1 are configured. According to this, the air guided to the arrangement part of the fan motor 14a by the air guide member 17b from the first ventilation port 17a flows forward toward the outer surface of the exhaust fan 14 through the arrangement part of the fan motor 14a. Then, the air cooling of the fan motor 14a is performed. Thus, the heat loss of the fan motor 14a due to the heat of the combustion exhaust is prevented. In addition, the air that has passed through the arrangement portion of the fan motor 14a flows from the extension case 1f into the upper space 13b through the second vent 17c and is sucked into the hot air fan 9.

  It is also conceivable to open the air intake 7 on the front panel 1e of the outer case 1 so as to be positioned on both the left and right outside of the window 1g. However, in this case, the front panel 1e has a complicated feeling with many openings, and the appearance is deteriorated, and the suction sound generated when the indoor air is sucked from the air intake port 7 is directly radiated to the front of the heater. As a result, noise increases. On the other hand, if the air intake port 7 is opened in the side plate portion 1b of the outer case 1 as in the present embodiment, the front panel 1e feels refreshed and looks good, and the suction sound is radiated to the side of the heater. The noise level of the suction sound in front of the heater is lowered.

  The hot air fan 9 is a sirocco fan that sucks air from the axial direction. Here, the axial length of the hot air fan 9 cannot be increased to the left in terms of strength. The horizontal dimension of the heater of the present embodiment is close to 90 cm. Therefore, in the upper space of the combustion housing 2, the hot air fans 9 are juxtaposed side by side in a posture in which the axial direction is along the horizontal direction, A common fan motor 9 a for driving the hot air fans 9, 9 is arranged between the hot air fans 9, 9. Most of the room air flowing into the side spaces 10 and 13 in the outer case 1 is sucked into the hot air fans 9 from the suction ports 9b at the outer ends in the axial direction. Further, a part of the indoor air flowing in from each air intake port 7 passes through the space between the front surface of the combustion housing 2 and the front panel 1 e and the space above the combustion housing 2 to each hot air fan 9. It is sucked from the suction port 9c at the inner end in the axial direction.

  Further, as clearly shown in FIG. 6, a lateral direction is defined on the back surface of the front panel 1 e of the outer case 1 so as to be positioned above the window portion 1 g and to define an air passage 18 a between the front panel 1 e and the front panel 1 e. A longitudinal duct 18 is attached to the top. Both ends of the duct 18 in the horizontal direction communicate with the upper portions of the left and right air intakes 7, 7. The duct 18 is provided with an air outlet 18b that is located in the vicinity of the fan motor 9a for the hot air fan 9, that is, in the center in the lateral direction of the duct 18.

  According to this, the room air from the upper part of each of the left and right air intakes 7 passes through the left and right halves of the duct 18, and each hot air fan 9 passes from the air outlet 18b via the arrangement part of the fan motor 9a. Is sucked from the suction port 9c at the inner end in the axial direction. Therefore, the panel portion on the upper side of the window portion 1g of the front panel 1e is air-cooled by the room air flowing through the duct 18, and the user does not have to be hot when touching the panel portion. The space above the combustion housing 2 is a place where the temperature condition is severe for the fan motor 9a. However, since the air from the air outlet 18b of the duct 18 flows to the arrangement portion of the fan motor 9a, the fan motor 9a is effectively cooled by air. Thus, the heat loss of the fan motor 9a does not occur.

  In order to reliably prevent the heat loss of the fan motor 9a, it is necessary to suppress the heat transfer from the combustion housing 2 to the fan motor 9a. Therefore, a partition plate 19 that defines a gap 19 a communicating with the arrangement portion of the heat exchanger 6 between the upper surface of the combustion housing 2 and the upper surface of the combustion housing 2 is disposed. Hot air fans 9 and 9 and a fan motor 9a are mounted. Then, by flowing at least a part of the air blown from each hot air fan 9 through the gap 19a to the arrangement part of the heat exchanger 6, the partition plate 19 is cooled by air, and the combustion housing 2 to the fan motor 9a is cooled. Heat transfer from is suppressed.

  Here, each hot air fan 9 is mounted on the partition plate 19 so that the air outlet 9d faces the upper surface of the combustion housing 2, and all the air blown from the hot air fan 9 passes through the gap 19a. It is also conceivable to flow through the arrangement part of the heat exchanger 6. However, in this case, the pressure loss in the gap 19a is increased, and the amount of warm air blown into the room from the air blowing port 8 is reduced. Therefore, in the present embodiment, each warm air fan 9 is mounted on the partition plate 19 so that the air outlet 9d faces directly above the arrangement portion of the heat exchanger 6, and on the lower surface of the partition plate 19, FIG. As shown in FIG. 2, a flow dividing plate 20 is attached for guiding a part of the air blown from the blowout port 9d of each hot air fan 9 to the gap 19a. According to this, the pressure loss in the gap 19a is reduced, and it is possible to prevent the amount of warm air from decreasing. In addition, the flow dividing plate 20 is provided on the lower surface of the partition plate 19 where the fan motor 9a is mounted, on both ends of the flow dividing plate 20 in the horizontal direction on the fan motor 9a side of the outlets 9d, 9d of the left and right hot air fans 9, 9. It is arranged in a state facing the end. Therefore, a part of the air blown from both the hot air fans 9 and 9 is guided to the flow dividing plate 20 and flows along the lower surface of the mounting portion of the fan motor 9a of the partition plate 19, and the mounting portion of the fan motor 9a is efficient. Air-cooled well. In the present embodiment, the fan motor 9a is mounted on the partition plate 19 via the mount rubber 9e. However, the air deterioration of the partition plate 19 can effectively prevent thermal deterioration of the mount rubber 9e.

  By the way, when the power outlet is disconnected or the power is cut off during the operation of the heater, and the hot air fan 9 is stopped, even if the combustion of the burner 3 is stopped, the combustion housing 2 and the heat exchanger 6 etc. The temperature inside the outer case 1 rises due to heat dissipation. In this case, normally, the hot air in the outer case 1 escapes from the air intake 7 to the outside, and the temperature in the outer case 1 does not rise excessively. However, if the filter 7a is clogged, hot air cannot be released to the outside. In particular, in the wall-embedded heater, the outer case 1 is surrounded by the chamber wall W, and heat dissipation through the outer case 1 is restricted, so that the temperature in the outer case 1 rises excessively and electronic control is performed. There is a possibility of causing heat loss of the unit 11 or the like.

  Therefore, in the present embodiment, a vent 21 that communicates the inside and outside of the outer case 1 is located on the upper plate portion 1d of the outer case 1 at the front portion exposed to the front of the chamber wall W as shown in FIG. The hot air in the outer case 1 can be released to the outside through the vent 21. In this case, in order to prevent the intrusion of dust into the outer case 1 through the vent 21, it is conceivable to attach a filter to the vent 21. However, in this case, the vent 21 is clogged with the filter. There is a possibility that the hot air cannot escape. Therefore, the lid member 22 is provided in the vent hole 21 to prevent the intrusion of dust from the vent hole 21 by closing the vent hole 21 at all times, and only when the temperature in the outer case 1 rises. 22 is opened so that hot air in the outer case 1 is released from the vent 21.

  Here, a bowl-shaped back plate 1i is attached to the lower surface of the front side portion of the upper plate portion 1d, and the upper plate portion 1d has an upper and lower double structure of the upper plate body and the back plate 1i. Vents 21 are formed in the upper and lower stages of the plate body and the back plate 1i. Then, the lid member 22 is attached to the back plate 1i by a hinge 22a, and the horizontal closed position shown in FIG. 8 (a) for closing the vent hole 21 of the back plate 1i, and FIG. 8 (b) for opening the vent hole 21 are shown. It is attached so as to be tiltable at an opening position obliquely upward. A lever portion 22b bent downward is formed at the edge of the lid member 22 on the hinge 22a side, and a spring 23 is stretched between the bracket 1j fixed on the lower surface of the back plate 1i and the lever portion 22b. The lid member 22 is biased to the closed position by the spring 23.

  Further, as clearly shown in FIG. 9, a wax thermo element 24 as a thermal member is attached to the bracket 1j. The wax thermoelement 24 includes a cylinder 24a filled with wax and a rod 24b pushed out from the cylinder 24a due to thermal expansion of the wax. The rod 24b is connected to the end of the bracket 1j away from the vent 21, and the end of the cylinder 24a is slidably inserted into the end of the bracket 1j close to the vent 21 so as to face the lever 22b. ing. When the temperature in the outer case 1 rises, the cylinder 24a is pushed toward the lever portion 22b with respect to the rod 24b due to the thermal expansion of the wax, and the pushing force of the cylinder 24a acting on the lever portion 22b exceeds the urging force of the spring 23. By the way, the lid member 22 is opened. Thus, when the temperature of the outer case 1 rises while the power is turned off during operation of the heater and the escape of hot air from the air intake port 7 is blocked by the clogging of the filter 7a, the wax thermoelement 24 The lid member 22 is opened, and the hot air in the outer case 1 escapes from the vent 21 to the outside. Therefore, the temperature in the outer case 1 does not rise excessively, and heat loss of the electronic control unit 11 is prevented. In addition, since the cover member 22 is normally biased and held in the closed position by the spring 23, the cover member 22 is not rattled by vibration during operation of the heater, and abnormal noise is generated due to rattling of the cover member 22. Is prevented.

  Note that the wax thermoelement 24 does not contract even if the temperature decreases once it is extended. Therefore, a spring 24c that urges the wax thermoelement 24 in the contracting direction is extrapolated to the wax thermoelement 24. However, if the spring force of the spring 23 for the lid member 22 is set to be stronger, the spring 24c can be omitted. A guard member 1k is provided on the upper surface of the front portion of the upper plate portion 1d so as to cover the vent hole 21 from above to prevent a foreign matter from falling, and an upper cover 11 that blinds the guard member 1k and the vent hole 21 is provided. It is placed via a spacer 1m. Further, an operation base 25 including an operation switch 25a and various inspection switches is provided on the right side of the front side portion of the upper plate portion 1d. The vent 21 is opened avoiding the arrangement part of the operation base 25. Further, the operation base 25 is covered with the upper cover 11, and only the operation switch 25 a is exposed upward through a hole formed in the upper cover 11.

  By the way, in this embodiment, the wax thermoelement 24 is used as the thermal member that is deformed by heat for opening the lid member 22, but the thermal member may be composed of a bimetal, a shape memory alloy, or the like.

  The glass plate 2b described above on the front surface of the combustion housing 2 is attached to a front door 2e that is detachable on the front surface of the main body of the combustion housing 2, and maintenance of the burner 3 in the combustion housing 2 is performed with the front door 2e removed. To be able to do. The front door 2e has claw pieces 2g (projected at the lower end portions of the left and right sides of the front door 2e in engagement holes 2f (see FIG. 3) formed at the lower ends of the left and right sides of the front surface of the main body of the combustion housing 2. In FIG. 4), it is locked so as to be tiltable in the front-rear direction. Also, a pair of left and right urging means 26 for the front door 2e are arranged on the upper surface of the combustion housing 2, the upper end of the front door 2e is urged rearward by the urging means 26, and the front door 2e is moved to the rear surface thereof. It is made to contact | adhere to the main body front surface of the combustion housing 2 via the packing 2h attached to.

  As shown in FIGS. 10 and 11, each urging means 26 includes a bracket 26a fixed to the upper surface of the combustion housing 2, a slider 26b supported by the bracket 26a so as to be movable in the front-rear direction, and a rear end of the bracket 26a. A spring 26c is provided between the rear end of the slider 26b and biases the slider 26b backward. The slider 26b is plate-shaped, and a nut 26d is caulked at an upward bent portion bent at the front end of the slider 26b. Then, a bolt 26e inserted from the front into a position facing each urging means 26 at the upper end portion of the front door 2e is screwed into the nut 26d at the front end of the slider 26b, and the slider 26b is pulled forward to pull the spring 26c. I try to pull. According to this, the upper end portion of the front door 2e is urged backward via the slider 26b by the tensile reaction force of the spring 26c.

  Here, if the glass plate 2 b is fixed to the front surface of the combustion housing 2, when an explosion ignition occurs in the combustion housing 2, there is a possibility that the glass plate 2 b breaks due to a sudden increase in internal pressure of the combustion housing 2. . On the other hand, in this embodiment, when the internal pressure of the combustion housing 2 rises due to explosion ignition, the front door 2e resists the urging force of the urging means 26 with the claw piece 2g at the lower end engaged with the engagement hole 2f as a fulcrum. Tilt forward. As a result, a gap is left between the combustion housing 2 and the front door 2e, and the high-pressure gas in the combustion housing 2 escapes from this gap, preventing the glass plate 2b from being damaged.

  The slider 26b is supported by a folded portion 26f formed on both sides of the bracket 26a so as to move in the front-rear direction but not in the lateral direction and upward. And since the upper end part of the front door 2e is connected with this slider 26b via the volt | bolt 26e, the side shake of the front door 2e does not arise. This eliminates the need for a separate stabilization means for preventing the side door 2e from sideways, thereby simplifying the structure and reducing costs.

  In addition, a shoulder portion 26g is formed at a middle portion in the front-rear direction of the side edge of the slider 26b. A forward stopper portion 26h is provided at the front end of the bracket 26a to engage the shoulder portion 26g and restrict the forward movement of the slider 26b at a predetermined position. This predetermined position is set such that the upper end portion of the front door 2e connected to the slider 26b via the bolt 26e does not contact the front panel 1e. Thus, even if the space in the front-rear direction between the combustion housing 2 and the front panel 1e is not as wide as left, the front door 2e vigorously tilts forward during explosion ignition, and the upper end of the front door 2e is moved to the front panel 1e. It is possible to reliably prevent the parts from colliding.

  Further, the bracket 26a is provided with a backward stopper portion 26i that contacts the rear end of the slider 26b and restricts the backward movement of the slider 26b at a predetermined position. Accordingly, when the front door 2e is attached, it is possible to prevent the slider 26b from being largely separated from the rear of the upper end portion of the front door 2e and the stroke until the slider 26b is pulled toward the front door 2e is excessive. However, if the bolt 26e is simply inserted into the upper end portion of the front door 2e, the bolt 26e is tilted, and the slider 26b (nut 26d) is bolted to the slider 26b (nut 26d) even if the slider 26b is not far left behind the upper end portion of the front door 2e. It is difficult to screw 26e. Therefore, as shown in FIG. 11, bolt insertion positions at the upper end of the front door 2e are from the front plate 2i, the upper plate 2j extending backward from the upper end of the front plate 2i, and the rear end of the upper plate 2j. It is formed in a reverse U-shaped cross section having a rear plate portion 2k extending downward, and a bolt insertion hole 21 is formed in the front plate portion 2i and the rear plate portion 2k. According to this, the bolt 26e is supported at the front and rear two portions of the front plate portion 2i and the rear plate portion 2k, the inclination of the bolt 26e is suppressed, and the bolt 26e can be easily screwed to the slider 26b. .

  By the way, if the front door 2e is urged and attached rearward by the urging means 26, the sealing performance of the front surface of the combustion housing 2 may be reduced as compared with the case where the glass plate 2b is fixed to the front surface of the combustion housing 2. is there. Here, in the present embodiment, outdoor air is supplied into the combustion housing 2 via the air supply path (air supply duct 5), and combustion exhaust in the combustion housing 2 is supplied from the heat exchanger 6 and the exhaust duct 15. A forced supply / exhaust fan that is discharged to the outside through the exhaust path is configured by an exhaust fan 14 provided in the exhaust path. Therefore, the inside of the combustion housing 2 becomes negative pressure due to the suction force of the exhaust fan 14. Accordingly, the front door 2e is pressed against the front surface of the combustion housing 2 by a pressure difference between the inside and outside of the combustion housing 2, and the sealing performance of the front surface of the combustion housing 2 is not deteriorated.

  As described above, the present invention is applied to a fireplace-type wall-embedded heater in which the inside of the combustion housing 2 can be visually observed through the window portion 1g opened on the front panel 1e of the outer case 1 and the glass plate 2b on the front surface of the combustion housing 2. The embodiment described above has been described, but the present invention can be similarly applied to a hot-air heating type wall-embedded heater in which the inside of the combustion housing 2 is invisible.

The perspective view seen from the diagonally forward right side of the heater of the embodiment of the present invention. The perspective view seen from the slanting rear upper part of the left side of the heater of embodiment. The front view of the state which removed the front panel of the heater of embodiment, and the front door of a combustion housing. The cutting | disconnection side view of the heater of embodiment cut | disconnected in the position shown by the IV-IV line in FIG. FIG. 4 is an enlarged plan view of an air intake port portion of the heater according to the embodiment cut at a position indicated by a line VV in FIG. The perspective view seen from the slanting back of the front panel of the heater of an embodiment. The perspective view seen from the slanting lower part of the arrangement | positioning part of the warm air fan of the heater of embodiment. (a) The perspective view of the vent opening location of the upper surface of the heater of embodiment, (b) The perspective view of the state in which the cover member provided in the vent was opened. The cut side view of the vent opening establishment location of the upper surface of the heater of an embodiment. The perspective view which shows the urging | biasing means for the front doors of the combustion housing of the heater of embodiment. FIG. 11 is a cut side view taken along line XI-XI in FIG. 10.

Explanation of symbols

  W ... chamber wall, Wa ... recess, 1 ... outer case, 1d ... upper plate part, 2 ... combustion casing, 3 ... burner, 6 ... heat exchanger, 7 ... air intake, 8 ... air inlet, 9 ... warm Wind fan, 21 ... vent, 22 ... lid member, 23 ... spring, 24 ... wax thermo element (thermal member).

Claims (2)

A wall-embedded heater disposed so as to be embedded in a recess formed in a chamber wall, and includes an outer case, a combustion housing containing a burner provided in the outer case, and an external flow through which combustion exhaust from the combustion housing flows. A heat exchanger in the case, an air intake opening and an air blowing opening established in the outer case, a filter covering the air intake opening, a room air is sucked from the air intake opening, and the air blowing opening is passed through the heat exchanger arrangement section. With a hot air fan in the outer case that blows into the room from
A vent opening communicating with the inside and outside of the outer case, an openable / closable lid member provided in the vent hole, and an outer case for opening and closing the lid member. A heat-moving member that is deformed by heat provided in the upper part of the inner case, and the lid member is configured to be opened by deformation of the heat-moving member when the temperature in the outer case rises. Recessed wall heater.   A spring for urging the lid member to the closed position is provided, and the lid member is configured to be pushed and moved to the open position against the urging force of the spring by deformation due to a temperature rise of the thermal member. The wall-embedded heater according to claim 1.

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