JP2005201602A - Outside air treatment device, and outside air treatment system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an outside air treatment device, and an outside air treatment system capable of stabilizing the temperature of air supplied into a room, and capable of cancelling the deterioration of reliability of an apparatus. <P>SOLUTION: Outside air is sucked into the outside air treatment device 10, and the sucked outside air is heated by the outside air treatment device 10 and supplied into the room. The temperature T1 of the sucked outside air is detected, and a heating amount is controlled in response to the detected temperature T1 and a supply air amount into the room. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an outside air processing apparatus and an outside air processing system that sucks and heats outside air and supplies the heated air to the room for ventilation.

  There is an outside air processing apparatus that is installed in a cold district or the like, sucks and heats outside air, and supplies the heated air to the room for ventilation (for example, Patent Document 1). In such an outside air processing apparatus, how to adjust the temperature of the air supplied to the room is an important factor.

For example, there is a method in which the temperature of air supplied to a room is detected by a temperature sensor, and heating is turned on / off so that the detected temperature becomes a set temperature.
Japanese Patent No. 3207043

As described above, when the heating is turned on / off according to the temperature of the air supplied to the room, the temperature of the temperature sensor part changes abruptly when the heating is turned off. It repeats.
In such a situation, there is a problem that the temperature of the air supplied to the room is unstable and the reliability of the device is deteriorated.

  In consideration of the above circumstances, the present invention provides an outside air processing apparatus and an outside air processing system that can stabilize the temperature of air supplied to a room and can eliminate deterioration in the reliability of equipment. It is intended to provide.

  The outside air processing apparatus of the invention according to claim 1 is a device that heats the sucked outside air with a heater and supplies it to the room, a temperature sensor that detects the temperature of the sucked outside air, and a temperature detected by the temperature sensor. And a control means for controlling the heating amount of the heater according to the amount of air supplied to the room, and an operating means for switching the control range of the heating amount by the control means.

  An outside air processing device according to a second aspect of the present invention supplies the indoor air that has been sucked in with a heater, and is supplied to the room, a first temperature sensor that detects the temperature of the air to be sucked in. A second temperature sensor for detecting the temperature of the air to be heated, a first control means for controlling the heating amount of the heater according to the detected temperature of the first temperature sensor and the amount of air supplied to the room, and the second temperature Second control means for controlling the heating amount of the heater in accordance with the detected temperature of the sensor; and operating means for selecting one of control by the first control means and control by the second control means; It has.

  An outside air processing system according to a third aspect of the present invention includes a plurality of outside air processing devices that heats the sucked outside air with respective heaters and supplies the air into the room through a duct, and is provided in each of the outside air processing devices. A first temperature sensor that detects the temperature of the outside air that is sucked in, a second temperature sensor that is provided in the duct and detects the temperature of the air supplied to the room, and a detected temperature of the first temperature sensor in each of the outside air processing devices. And the first control means for controlling the heating amount of the heater in each outdoor air processing device according to the amount of air supplied to the room, and the heater of each outdoor air processing device according to the temperature detected by the second temperature sensor. Second control means for controlling the heating amount and operation means for selecting one of control by the first control means and control by the second control means are provided.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to stabilize the temperature of the air supplied indoors, the external air processing apparatus and external air processing system which can eliminate the deterioration of the reliability of an apparatus can be provided.

[1] A first embodiment of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 and 2, an outside air processing device 10 is installed on the outer wall surface of a house 2 built on the ground 1. The outside air processing apparatus 10 becomes the outside air introduction part 11 which the lower part of a housing expands in a skirt shape. A duct 4 is connected to the air outlet 12, and the duct 4 is introduced into the room of the house 2 through an insertion hole in the outer wall surface of the house 2. A suction fan 5 is accommodated in the introduction portion of the duct 4. By the operation of the suction fan 5, outside air suction pressure is applied to the outside air introduction part 11 through the duct 4, the air outlet 12, and the inside of the housing.

  On the other hand, the gas pipe 3 is led out from the ground 1, and the gas pipe 3 is connected to the casing of the outside air processing apparatus 10. The combustion of the gas supplied from the gas pipe 3 heats the outside air sucked from the outside air introduction unit 11. An exhaust pipe 13 is led out from the upper part of the casing of the outside air processing apparatus 10, and exhaust gas combustion required for heating the outside air is exhausted outside the room through the exhaust pipe 13.

  A suction temperature sensor (first temperature sensor) 15 for detecting the temperature of the sucked outside air is provided inside the outside air introduction unit 11 of the outside air processing device 10. Further, a blowout temperature sensor (second temperature sensor) 16 for detecting the temperature of the air supplied to the room is provided at the blowout port 12 of the outside air processing apparatus 10.

  As shown in FIG. 3, a filter 20 is provided in the opening of the outside air introduction unit 11 and a gas burner unit 21 and a combustion unit 22 are accommodated as a heater in the casing of the outside air processing apparatus 10. A large number of heat exchange pipes 23 and the exhaust pipe 13 are provided upright from the top. A gas connection port 24 is provided on the side of the housing, and the gas pipe 3 is connected to the gas connection port 24. The gas supplied to the gas connection port 24 is supplied to the gas burner unit 21 through the gas pipe 25, the gas valve unit 26, and the gas introduction pipe 27. The gas introduction pipe 27 communicates with the blower fan 28, and the air taken in by the blower fan 28 is supplied to the gas introduction pipe 27 as combustion air.

In addition to the above-described combustion appliances, a wiring connection portion 29 and a control unit 30 are provided in the casing of the outside air processing device 10.
The control unit 30 is connected to a commercial AC power supply 40 as shown in FIG. The control unit 30 includes a suction fan motor 5M, temperature sensors 15 and 16, an igniter 21a of the gas burner unit 21, a frame rod 21b of the gas burner unit 21, an on-off valve 26a and 26b and a proportional valve 26c of the gas valve unit 26, and a blower fan. A motor 28M and an operation unit (operation means) 31 are connected.

Next, the operation of the above configuration will be described.
When the operation of the outside air treatment device 10 is started, gas combustion is started in the gas burner unit 21, and the exhaust gas is discharged from the combustion unit 23 through the heat exchange pipes 23 to the outside from the exhaust pipe 13. At this time, the suction fan 5 operates, and the outside air is sucked into the outside air introduction part 11 of the outside air processing device 10. The sucked outside air receives heat from the combustion unit 23 and each heat exchange pipe 23 and rises in temperature. The outside air is drawn out from the upper outlet 12 to the duct 4 and led into the room.

  The temperature T1 of the outside air sucked into the outside air introduction unit 11 is detected by the suction temperature sensor 15, and as shown in FIG. 5, a set value “Ts-a” in a plurality of stages with the detected temperature T1 and the set temperature Ts as a reference. Compared with “Ts-a-b”, “Ts-a-2b”, “Ts-a-3b”, and “Ts-a-4b”, the heating amount by gas combustion of the gas burner unit 21 (control of the gas valve unit 26) is increased. It is controlled sequentially in the range from stop and minimum to maximum. The set temperature Ts can be variably set, for example, in the range of 5 ° C. to 20 ° C. by the operation of the operation unit 31, and an optimum value can be selected in consideration of the indoor environment.

“A” is a temperature increase range determined according to the minimum heating amount of the gas burner unit 21 and the supply air amount by the operation of the suction fan 5. Specifically, when the minimum heating amount is K (kcal / h), the supply air volume is Q (m ³ / h), the specific heat of air is 0.24 (kcal / kg · k), and the specific volume is v. Then
a = K / (0.24 · v · Q).

  The supply air volume Q can be estimated based on the speed of the suction fan motor 5M, but an air volume selection switch is provided in the operation unit 31 to take into account clogging and deterioration of the filter 20, pressure loss of the duct 4, installation conditions, and the like. You may set it manually. Since the specific volume v varies depending on the state of the intake air, an average value is set in advance in consideration of the equipment use conditions.

As for “b”, if the heating amount is divided into five stages from the minimum to the maximum,
b = (maximum heating amount−minimum heating amount) / [(5-1) · 0.24 · v · Q].

  In this way, the heating amount of the gas burner unit 21 is controlled stepwise according to the temperature T1 of the outside air to be sucked and the amount of air supplied by the operation of the suction fan 5, thereby heating according to the temperature of the air supplied indoors. As in the case of on / off control, heating is not repeatedly turned on / off frequently, and the temperature of the air supplied to the room can be stably maintained at a desired set temperature Ts.

  Not only the heating amount control according to the detected temperature T1 of the suction temperature sensor 15 and the supplied air volume, but also the detected temperature of the blown air temperature sensor 16 (according to the temperature of the air supplied indoors) as shown in FIG. Heating amount control according to T2 is also possible, and either one of the two controls can be selected by operating the operation unit 31. For example, depending on the installation state of the outside air processing device 10, the temperature T1 of the outside air to be sucked may be easily affected by disturbances (exhaust gas from automobiles, exhaust heat from other air conditioners, etc.). In such a situation, it may be more comfortable to select the heating amount control according to the detection temperature T2 of the blown air temperature sensor 16 instead.

[2] A second embodiment will be described.
As shown in FIG. 7, two outside air processing apparatuses 10 are installed on the outer wall surface of the house 2. One duct 4 is connected to each outlet 12 of the outside air processing apparatus 10. This duct 4 is gathered into one from the connection part to each outlet 12, and the gathered part is introduced into the room of the house 2 through the insertion hole of the outer wall surface of the house 2. And one blowing temperature sensor 16 is provided in the collective part of this duct 4. This blowing temperature sensor 16 commonly detects the temperature T2 of the air supplied indoors from each outside air processing device 10.
Since other configurations and operations are the same as those of the first embodiment, description thereof is omitted.

[3] In each of the above embodiments, the gas burner unit 21 using gas as a fuel is employed as the heater. However, the present invention is not limited to gas, and a heater utilizing oil or hot water may be employed.
In addition, the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine the component covering different embodiment suitably.

The figure which shows the external appearance of 1st Embodiment of this invention. The figure which looked at FIG. 1 from the side. The figure which shows the internal structure of each embodiment. The block diagram which shows the structure of the control unit in each embodiment. The figure for demonstrating heating amount control according to detection temperature T1 of each embodiment. The figure for demonstrating heating amount control according to detection temperature T2 of each embodiment. The figure which shows the external appearance of 2nd Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 2 ... House, 3 ... Gas pipe, 4 ... Duct, 5 ... Suction fan, 10 ... Outside air processing device, 11 ... Outside air introduction part, 12 ... Outlet, 13 ... Exhaust pipe, 15 ... Suction temperature sensor (1st temperature sensor) ), 16 ... Blowing temperature sensor (second temperature sensor), 20 ... Filter, 21 ... Gas burner unit, 22 ... Combustion unit, 23 ... Heat exchange pipe, 24 ... Gas connection port, 26 ... Gas valve unit, 28 ... Blower fan, 31. Operation unit

Claims (3)

In an outside air processing apparatus that heats the sucked outside air with a heater and supplies it to the room, a temperature sensor that detects the temperature of the sucked outside air, and a detected temperature of the temperature sensor and an amount of air supplied to the room An outside air processing apparatus comprising: control means for controlling the heating amount of the heater; and operating means for switching a control wiring board for controlling the heating amount by the control means. A first temperature sensor for detecting the temperature of the sucked outside air and a second temperature for detecting the temperature of the air supplied into the room in an outside air processing apparatus for heating the sucked outside air with a heater and supplying the same into the room According to the sensor, the first control means for controlling the heating amount of the heater according to the detected temperature of the first temperature sensor and the amount of air supplied to the room, and the detected temperature of the second temperature sensor, And a second control unit for controlling a heating amount of the heater, and an operation unit for selecting one of the control by the first control unit and the control by the second control unit. Outside air treatment device. In the outside air processing system including a plurality of outside air processing devices that heat the sucked outside air with respective heaters and supply the air to the room through a duct, the temperature of the sucked outside air is detected in each of the outside air processing devices. A first temperature sensor; a second temperature sensor provided in the duct for detecting the temperature of air supplied to the room; and a temperature detected by the first temperature sensor in each of the outside air processing apparatuses and supply to the room The first controller for controlling the heating amount of the heater in each of the outside air processing devices according to the amount of air, and the heating of the heater in each of the outside air processing devices according to the temperature detected by the second temperature sensor. A second control means for controlling the amount; and an operation means for selecting one of the control by the first control means and the control by the second control means. Outside air processing system that.

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