JP2011047602A - Hot air heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To sense an obstacle (a) present in the vicinity of a front face of a heater, in the hot air heater used for sucking indoor air from a suction port 2 opened in a housing 1 by operation of a circulating fan 4, heating the indoor air by a heating means 5 and sending the indoor air from a blowout port 3 opened in a front face lower part of the housing 1 as hot air, including a sensor chamber 10 which is arranged in the lower part within the housing 1 and partitioned by a partition plate 9 with respect to a ventilation space 8 between the heating means 5 and the blowout port 3 and to which the indoor air is made to flow in and performing temperature control for turning on/off sending of hot air based on the detection temperature by a room temperature sensor 11 arranged in the sensor chamber 10. <P>SOLUTION: The hot air heater performs abnormality determination control for determining that an abnormality occurs when turning-on/off frequency of hot air sending by the temperature control exceeds predetermined frequency within a predetermined time. When it is determined that an abnormality occurs, at least either one of abnormality display and stop of heating operation is performed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  In the present invention, a circulation fan and a heating means such as a hot water radiator are disposed in the housing below the circulation fan, and the circulation fan operates to suck indoor air from a suction port established in the housing. The present invention relates to a warm air heater which is heated by a heating means and blows as warm air from a blowout opening established in a lower front portion of a housing.

  Conventionally, as a warm air heater of this type, a sensor chamber that is partitioned by a partition plate into a ventilation space between a heating means and a blowout opening and into which indoor air can flow is provided in a lower portion of a housing. There is known one in which temperature control is performed to turn on / off warm air based on the temperature detected by a room temperature sensor disposed in (see, for example, Patent Document 1).

  It is also conceivable to provide a room temperature sensor at a portion facing the upper inlet in the housing. However, in this case, when the circulation fan is stopped by the temperature control, the hot air near the heating means rises to the room temperature sensor arrangement part, and the detection temperature of the room temperature sensor becomes higher than the room temperature. Temperature control cannot be performed. On the other hand, if a room temperature sensor is arranged in the sensor chamber provided in the lower part of the housing as described above, such a problem does not occur.

  By the way, if there are obstacles such as people or figurines in the vicinity of the front surface of the warm air heater, the warm air is blocked by the obstacles and the heating effect is reduced or the obstacle is overheated. However, in the above-mentioned conventional hot air heater, even if there is an obstacle in the vicinity of the front surface, this cannot be detected and left as it is.

JP 59-210229 A

  This invention makes it the subject to provide the warm air heater which enabled it to detect when the obstruction exists in the front vicinity of a heater in view of the above point.

  In order to solve the above-described problems, the present invention provides a suction port in which a circulation fan and a heating unit are disposed below the circulation fan and the indoor air is opened in the housing by the operation of the circulation fan. Is a warm air heater that is heated by a heating means and blown as warm air from a blower opening formed in the lower front part of the housing, and in the lower part of the housing, in a ventilation space between the heating means and the blower outlet A sensor chamber that is partitioned by a partition plate and into which room air can flow is provided, and includes a control means that performs temperature control to turn on / off hot air based on the temperature detected by a room temperature sensor disposed in the sensor chamber The control means is configured to perform abnormality determination control for determining that there is an abnormality when the number of on / off operations of the hot air blowing by the temperature control control exceeds a predetermined number within a predetermined time. And wherein the Rukoto.

  Here, if there is an obstacle in the vicinity of the front surface of the heater, the hot air hits the obstacle and rebounds, the hot air flows into the sensor chamber, the temperature detected by the room temperature sensor rises, and the hot air blowing is stopped (off). The In this case, since the room temperature has not actually increased, the detection temperature of the room temperature sensor immediately decreases when the hot air blowing is turned off, and the hot air blowing is resumed (turned on). When hot air blowing is resumed, the temperature detected by the room temperature sensor immediately rises due to the inflow of hot air into the sensor chamber, and hot air blowing is stopped again. Therefore, the on / off of the hot air blowing is repeated at short time intervals.

  Therefore, when there is an obstacle in the vicinity of the front surface of the heater, the number of on / off times of the hot air blowing by the temperature control becomes a predetermined number or more within a predetermined time. According to the present invention, since it is determined that there is an abnormality at this time, the presence of an obstacle can be detected.

  In the present invention, the control means is preferably configured to perform at least one of an abnormality display and a heating operation stop when it is determined that there is an abnormality in the abnormality determination control. By performing the abnormality display, it is possible to notify the user that there is an obstacle, and it is possible to prevent the obstacle from being overheated by stopping the heating operation.

The front view of the warm air heater of embodiment of this invention. Sectional drawing cut | disconnected by the II-II line | wire of FIG. The flowchart which shows the content of the abnormality determination control which the controller of the hot air heater of embodiment performs.

  1 and 2, reference numeral 1 denotes a hot air heater housing. A suction port 2 is opened at the upper front of the housing 1 and a blowout port 3 is opened at the lower front. This hot air heater is a wall-mounted type, and is installed on the wall surface K so that the height of the lower end of the housing 1 from the floor surface F is 10 cm or less.

  In the housing 1, a circulation fan 4 is disposed at an upper portion, and a radiator 5 is disposed as a heating unit that is positioned below the circulation fan 4 and supplies hot water heated by a heat source device or the like. . The circulation fan 4 is constituted by a centrifugal fan that is housed in a fan casing 4 a facing the suction port 2 and driven by a motor 4 b. When the circulation fan 4 is operated, room air is sucked into the fan casing 4a through the suction port 2, and is blown from the fan casing 4a toward the radiator 5 below. The room air is heated by the radiator 5 and blown into the room as warm air from the outlet 3.

  An operation panel 6 is provided on the upper surface of the housing 1. In addition, a controller 7 serving as a control unit is disposed at an upper portion in the housing 1 so as to be positioned between the fan casing 4 a and the operation panel 6.

  Further, an extension portion positioned below the blowout port 3 is formed in the lower portion of the housing 1, and a partition plate 9 is provided in the extension portion with respect to the ventilation space 8 between the radiator 5 and the blowout port 3. A sensor chamber 10 partitioned by is provided. A vent hole 10a is formed in the front surface of the sensor chamber 10, and indoor air flows into the sensor chamber 10 through the vent hole 10a. A room temperature sensor 11 composed of a thermistor is disposed in the sensor chamber 10.

  A detection signal from the room temperature sensor 11 is input to the controller 7. Based on the temperature detected by the room temperature sensor 11, the controller 7 performs temperature adjustment control for turning on / off the hot air blow so that the room temperature is maintained substantially at the heating set temperature. In the temperature control, when the temperature detected by the room temperature sensor 11 becomes equal to or higher than the upper limit temperature set higher than the heating set temperature by a predetermined temperature (for example, 2 ° C.), the hot air blowing is stopped (off), and then the room temperature When the detected temperature of the sensor 11 becomes equal to or lower than the lower limit temperature set lower than the heating set temperature by a predetermined temperature (for example, 1 ° C.), warm air blowing is resumed (turned on). The hot air blowing is turned off by stopping the circulation fan 4 and stopping the supply of hot water to the radiator 5. In addition, it is also possible to stop the circulation fan 4 while the supply of hot water to the radiator 5 is continued and to turn off the hot air blowing.

  By the way, as shown by the phantom line in FIG. 2, if the obstacle a exists in the vicinity of the front surface of the warm air heater, the warm air is blocked by the obstacle a and the heating effect is reduced or the obstacle a is overheated. Or Therefore, the controller 7 executes abnormality determination control in addition to the above-described temperature adjustment control in order to detect the presence of the obstacle a in the vicinity of the front surface of the hot air heater.

  Hereinafter, the abnormality determination control will be described with reference to FIG. In the abnormality determination control, first, a timer is started in STEP 1, and then the process proceeds to STEP 2 to count the number C of hot air blowing ON / OFF by temperature control. Note that the number of times the hot air blowing is turned on / off is the number of times the temperature detected by the room temperature sensor 11 is higher than the upper limit temperature and the hot air blowing is turned off, or the temperature detected by the room temperature sensor 11 is lower than the lower limit temperature. The number of times the hot air blowing is turned on may be the total number of times the hot air blowing is turned off and turned on. In the present embodiment, the number of hot air blows turned off and the total number of turns on are counted as the hot air blow ON / OFF count C.

  Next, proceeding to STEP 3, it is determined whether or not the hot air blowing ON / OFF count C counted after starting the timer has reached a predetermined number YC (for example, 7 times) or more. If C <YC, the process proceeds to STEP 4 to determine whether or not the timer time TM has reached a predetermined time YTM (for example, 10 minutes). If TM <YTM, the process returns to STEP 2.

  Here, when the obstacle a exists in the vicinity of the front surface of the hot air heater, the hot air hits the obstacle a and rebounds, the hot air flows into the sensor chamber 10, the temperature detected by the room temperature sensor 11 rises, and the hot air blows Is turned off. In this case, since the room temperature has not actually increased, the temperature detected by the room temperature sensor 11 immediately decreases when the hot air blowing is turned off, and the hot air blowing is resumed (turned on). When hot air blowing is resumed, the temperature detected by the room temperature sensor 11 immediately rises due to the inflow of hot air into the sensor chamber 10, and the hot air blowing is turned off again. Therefore, the on / off of the hot air blowing is repeated at short time intervals.

  Therefore, when the obstacle a exists in the vicinity of the front surface of the warm air heater, the on / off frequency C of the warm air blowing becomes equal to or more than the predetermined number YC within the predetermined time YTM, and “YES” is determined in STEP3. In this case, it is determined in STEP 5 that there is an abnormality, and the process proceeds to STEP 6 where an abnormality display for notifying that the obstacle a is present is performed and the heating operation is stopped. Therefore, it is possible to prevent the obstacle a from being overheated by leaving the obstacle a present.

  When the predetermined time YTM has elapsed without the hot air blowing ON / OFF count C being equal to or greater than the predetermined number YC, the timer is reset in STEP 7 and then the process returns to STEP 1 to repeat the above-described abnormality determination control.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to this. For example, in the above-described embodiment, the present invention is applied to a wall-mounted hot air heater, but the present invention can be similarly applied to a floor-standing hot air heater. In this case, you may open a suction inlet in the back surface of a housing. Moreover, in the said embodiment, although the heat radiator 5 is used as a heating means, it is also possible to use other heating means, such as an electric heater.

  Moreover, in the said embodiment, although the extension part located below the blower outlet 3 is formed in the housing 1, and the sensor chamber 10 is provided in this extension part, it is the same height as the blower outlet 3 in the housing 1. It is also possible to provide a sensor chamber partitioned by a partition plate on the side surface of the ventilation space 8 in the lower side portion. Further, the sensor chamber 10 may be communicated with the suction side of the circulation fan 4 through an appropriate pipe so that the indoor air is actively circulated through the sensor chamber 10.

  DESCRIPTION OF SYMBOLS 1 ... Housing, 2 ... Suction inlet, 3 ... Outlet, 4 ... Circulation fan, 5 ... Radiator (heating means), 7 ... Controller (control means), 8 ... Ventilation space, 9 ... Partition plate, 10 ... Sensor room 11 ... Room temperature sensor.

Claims (2)

A circulation fan and a heating means are arranged in the housing and are positioned below the circulation fan. By operating the circulation fan, the indoor air is sucked from a suction port opened in the housing and heated by the heating means. This is a warm air heater that blows air as warm air from the air outlet opened in the lower part, and is divided by a partition plate in the lower part of the housing for the ventilation space between the heating means and the air outlet, allowing room air to flow in A sensor chamber is provided, and includes a control means for performing temperature control for turning on / off the warm air based on the detected temperature of the room temperature sensor disposed in the sensor chamber.
The control means is configured to perform abnormality determination control for determining that there is an abnormality when the number of times of on / off of the hot air blowing by the temperature control becomes equal to or greater than a predetermined number within a predetermined time. Machine.   The hot air heater according to claim 1, wherein the control means is configured to perform at least one of an abnormality display and a heating operation stop when it is determined that there is an abnormality in the abnormality determination control. .

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