KR940007183B1 - Apparatus for controlling air conditioner - Google Patents

Abstract

The controller for an air conditioner includes a plurality of variable resistors for correcting a target value, corresponding to a target control amount, thereby appropriately maintaining a spouting temperature.

Description

Control Unit of Air Conditioner

1 is a block diagram showing the functional configuration of a control apparatus for a gas warm air heater according to an embodiment of the present invention;

2 is a perspective view showing the front surface of the gas hot air heater of this embodiment,

3 is a perspective view showing the back of the gas pong heater of the present embodiment,

4 is a configuration diagram showing a schematic configuration of the gas hot air heater of this embodiment;

5 is a partial front view of the gas warm air heater showing the closed state of the damper of this embodiment;

6 is a partial front view of the gas warm air heater showing the open state of the damper of this embodiment;

7 is a characteristic diagram showing the determination characteristic of the heating capability in the temperature regulation mode in the capability determination part of the control apparatus of this embodiment;

8 is a characteristic diagram showing the voltage applied to the convection fan with respect to the heating capacity determined by the capacity determining unit of this embodiment.

* Explanation of symbols for the main parts of the drawings

1: Gas hot air heater (air conditioner) 7: Convection duct (Songpung duct)

8: convection fan (blower), 10: burner (heating means)

30: control device (control device of the air conditioner) 35: capability determination unit (control amount determination means)

37a, 37b: variable resistor

The present invention relates to a control device of an air conditioner, in which only heating water or cooling means and a blower are disposed in a casing, and the heating means or cooling means and the blower are controlled based on a target control ring.

In the resonator, the control command of the heating means or the cooling means and the blowing amount of the blower are appropriately controlled so that the wind of a suitable temperature is ejected.

Such a blower is driven by an alternating current motor whose rotation speed is simply changed by changing the applied voltage, and by changing the applied voltage to the motor in response to the control amount of the heating means or the cooling means, the blowing temperature is blown out to an appropriate temperature. Keeping up.

Here, since there is a nonuniformity in the AC motor or the blowing duct of the blower, the control device for determining the applied voltage to the AC motor is provided with a variable resistor for correcting the indication value of the applied voltage, and the variable resistor is adjusted at the factory. This makes it possible to obtain a stable blowing temperature from the amount of heat to large amount of heat.

On the other hand, in recent years, it is desired to increase the capacity of heating or cooling sufficiently even in a case where the heating load or cooling load of a relatively large indoor light is large. In the case where there is little, it is desired that the removal amount is sufficiently limited so that excessive heating or cooling is not performed.

However, in the AC motor of the blower, since the rotational speed characteristics with respect to the applied voltage are constant, the amount of heating of the heating means or the cooling means is increased according to the above requirement, and the control heat is sufficiently large at a sufficiently small control heat. When it is possible to change it in a wide range up to, the control instruction value is controlled in a constant relation from the calorific value to the large heat quantity with respect to the control instruction value of the blower determined in a constant relationship corresponding to the heating amount of the heating means or the cooling amount of the cooling means. In the case of using a variable resistor to be corrected, the heating means or the heating means may be used on the other side (for example, the calorific value side) even if the hot air temperature can be adjusted to an appropriate temperature on one side (for example, the large calorific value side) with respect to the control indication value. The amount of air blown is too much or too little with respect to the control heat of the cooling means. There is no problem.

An object of the present invention is to provide a control device of an air conditioner that can cope with a wide change in the control heat amount of a heating means or a cooling means, and can maintain a blowing temperature appropriately.

The present invention comprises a heating means or cooling means disposed in the blower duct and a blower for generating air flow in the blower duct, while controlling the heating means or the cooling means in accordance with a target control amount determined by a control amount determining means and at the same time the target means. In the control window of the air conditioner for determining the target value of the blower based on the control amount, a variable resistor for correcting the target value is provided, and the plurality of variable resistors are technically implemented in correspondence with the target control amount. .

In the present invention, since a plurality of variable resistors are provided corresponding to the target control amount, the target value determined based on each target control amount can be guaranteed for each target control amount.

In the present invention, since the target value of the blower can be corrected in correspondence with each target control amount, it is possible to adjust the amount of air blowing appropriately according to each control heat amount from the heat value of the heating means or the cooling means to the large heating amount. Therefore, the blowing temperature is stabilized regardless of the control heat amount of the heating means or the cooling means.

Next, this invention is demonstrated based on the Example of a warm air heater. In the stationary gas hot air heater 1 shown in FIG. 2 and FIG. 3, the outer casing 2 is formed from several members by the metal plate and resin, and the outer shaft casing 2 consists of a plurality of openings, respectively. The indoor air inlet (3) and the inlet (4) of the combustion air are provided above the rear side, and a hot air outlet (5) for blowing warm air, respectively, below the front face, and the indoor air inlet (3). And the inlet 4 are covered with a filter 6 which is attached to the outer casing 2 and which is freely detachable.

As shown in FIG. 4, the convection duct 7 is provided inside the outer casing 2, and the perfusion duct 7 is blown casing in the vicinity of the hot air outlet 5 in the convection duct 7. A convection fan 8 is arranged, and the intake port 4 and the hot air blower outlet 5 are the upstream end and the lower end of the convection duct 7, respectively. In addition, the convection fan 8 drives the impeller 8a arrange | positioned in the convection duct 7 with the direct current motor 8b. The warm air blower outlet 5 is provided with a damper 9 for closing a part of the warm air blower outlet 5, and rotates according to an operating state to control the blown air state passing through the convection duct 7.

Here, when the damper 9 closes a part of the hot air jet 5, as shown in FIG. 5, approximately half of the hot air jet 5 is closed and the hot air jet 5 is opened. In this case, as shown in FIG. 6, the valve is opened outward so as to be in close contact with the upper end surface of the warm air jet port 5.

On the other hand, a burner 10 as a heating source is disposed upstream of the convection fan 8 in the convection duct 7, and the hot combustion gas generated by the burner 10 is accompanied by the operation of the convection fan 8. It mixes with the indoor air introduced from the indoor air inlet (3) to become warm air, and is ejected from the hot air blower (5).

In the air induction pipe 11 which guides combustion air to the burner 10 from the inlet 4, a nozzle 12, which is a downstream end of the fuel supply path 12 for guiding fuel gas, is disposed, and the nozzle ( The fuel gas ejected from 13 is led to the mixing chamber 14 together with the combustion air, and burned in the burner 10.

In the fuel supply passage 12, two solenoid valves 15 and 16 and a gas governor 17 for maintaining a constant supply gas pressure are provided in order from the upstream side, and the fuel supply passage 12 is a gas governor 17. Downstream of the main pipe 12a and the two bypass pipes 12b and 12c, the main pipe 12a and the two bypass pipes 12b and 12c are joined again and connected to the nozzle 13 have.

The main pipe 12a is provided with a proportional valve 18 for adjusting the fuel gas amount, and the bypass pipe 12b is provided with a gas amount adjusting screw 19 for adjusting the minimum supply amount of fuel gas.

The bypass pipe 12c is an auxiliary fuel supply path for increasing the supply of fuel gas by a predetermined amount (for example, 15%) in order to perform rapid heating (hot dashing) at the beginning of operation. The bypass electronic valve 20 is configured. In the vicinity of the burner 10, an ignition electrode 21 for performing spark discharge for ignition and a thermocomer 22 for monitoring the burned state of the burner 10 are provided. In addition, the intake port 4 is provided with a dummyster 23 for sensing the room temperature. In addition, the inlet 4 is provided with a dummyster 23 for detecting the room temperature.

The upper surface of the outer casing 2 of the gas hot air heater 1 having the above configuration is covered with an operation switch 24 for instructing operation start and stop, and an opening and closing stopper 25 made of resin, which will be described later. The operation display part containing the plurality of squelch and the display device 26 for performing the operation of the gas heating-air heater 1 is started and stopped by the control window 30 shown in FIG. The amount of heating is controlled.

The control device 30 is composed of a microcomputer (hereinafter referred to as a "microcomputer") equipped with various input / output circuits, and a driving circuit for driving each part of the gas air-heater 1 by a microcomputer. As the functional unit constituted by the furnace, the mode control unit 31, the display control unit 32, the setting control unit 33, the operation control unit 34, the capability determination unit 35, the proportional valve control unit 36, and the fan gear unit ( 37) there is a damper control unit 38.

Moreover, as an operation switch value which gives an operation signal to the control window value 30, the setting switch which consists of display switching switch value U, the time alignment switch 42, and two switches of said operation switch 24 ( 43) There are two on-timer switches 44 and 45 (off-timer switch 46 and save operation switch 47). The operation purpose of each switch and the control contents of each functional unit according to the operation of each switch will be described below.

The mode control unit 31 is a function unit for setting the operation mode of the gas warm air heater 1 and the display mode of the display device 26. The mode control unit 31 has a large connector terminal 51 on a jagger substrate (not shown). 52 is provided, and the operation mode or the display mode is changed as follows according to the conduction state of the external circuits connected to the respective connector terminals 51 and 52.

The connector terminal 51 is provided with at least two connection pins, and the mode control unit 31 has the capability of shorting between the pins of the connector terminal 51 by a predetermined connector or the like that matches the connector terminal 51. When the determination unit 35 is controlled in the step mode, and the short circuit between the pins of the contactor terminal 51 is not shorted, the capability check unit 35 is controlled in the temperature control mode.

In the temperature control mode, the mode control unit 31 switches between the temperature display mode and the time display mode in accordance with the operation signal from the display changeover switch 41 with respect to the display device 26, and at the same time switches the display modes. In synchronism, the setting mode by the setting switch 43 is determined.

The connector terminal 52 is provided with four connection pins, for example, and the mode control part 3l connects between each pin of the large connector terminal 52 by the predetermined | prescribed connector etc. matched with the contactor terminal 52, and the like. When the short circuit occurs, the display control unit 32 is controlled to the inspection mode in accordance with the short circuit state of each connection funnel.

In this case, the connector matching the connector terminal 52 is provided with a switching switch for forming a predetermined short circuit between each pin in advance, so that the required inspection mode can be easily selected.

The display control unit 32 displays the display contents of the display device 26 in accordance with the control state of the mode control unit 31 at the same time as the selection terms, and displays the selected display contents as follows.

In the present embodiment, as the display device 26, an LED composed of seven digits of seven digits is provided, and the letters corresponding to the numbers from "0" to "9" and the letters from "A" to "F". Display. In the case of the temperature control mode, the temperature display mode and the time display mode are switched in accordance with the switching signal from the display changeover switch 41, the set temperature and the detection temperature are set in the temperature display mode, and the time alignment switch 42 in the time display mode. Displays the current time or the set time selected by. In the case of the step mode, the capability level corresponding to each heating capability is displayed according to the heating capability selected by the setting switch 43.

In the case of the inspection mode, for example, for each inspection mode according to the short-circuit state of each pin of the connector terminal 52, the detection temperature by the dummy 23, the control instruction value to the convection fan 8, the proportional valve 18 Control command value, the correction value to the convection man 8 by the variable resistors 37a and 37b described later, the correction value to the convection valve by the variable resistor 36a, the output of the thermocouple 22, the setting time of the timer, and the like. Displayed in accordance with the operation of each switch provided in this operation display section.

In addition, the display device 26 includes LEDs indicating operation, combustion, or hot dash, other selection states of the time alignment switch 42, and operation states of the timer switches 44 to 46 and the save operation switch 47. LEDs which display each, and LED which flickers when a blockage is detected by the filter 6 by the filter switch which is not shown in figure are provided.

The setting control unit 33 is a function unit for controlling the setting contents by the setting switch 43 according to the setting mode. In the case of the temperature control mode, the setting control unit 33 is selected according to the display mode selected by the display changeover switch 41. In the time display mode, the set temperature is set to the time selected by the time alignment switch 42.

The set temperature to be set includes "L (equivalent to about 10 deg. C)", "16", "18", ..., "26", "H (for continuous high-speed operation)" and 8 steps every 2 deg.

In addition, the setting controller 33 has a lock function mainly for fixing (locking) the set temperature, and when the two setting switches 43 are operated at the same time and the operation time is continued for 0.5 seconds or more, the set temperature, etc. Is fixed, and it is indicated by the lock length of the display device 26 that it is being fixed.

When the set temperature is fixed, even if one of the set switches 43 is operated, the set temperature is not changed. When the set temperature is fixed, the operation for starting operation by the operation switch 24 and each of the timer switches 44 to 46 is not accepted even for the operation control. In addition, if two setting switches 43 are operated simultaneously for 0.5 seconds or more during fixing, fixing is performed. Release and accept the operation of each switch again.

The operation control unit 34 performs operation start control in a predetermined sequence according to the operation signal of the operation switch 24 and starts ignition control of the burner 10. At the same time, the operation control unit 34 operates according to the operation signal of the operation switch 24 during combustion. Operation stop control is performed and predetermined fire extinguishing control is performed.

After the ignition control, the ignition detection is performed by the thermocouple 22, and when the output voltage of the thermocouple 22 becomes equal to or higher than a constant voltage, it is determined as the ignition stop state. The output voltage of the thermocouple 22 is determined based on whether or not the predetermined voltage is higher than or equal to the predetermined voltage.

In the present embodiment, when the heating capacity determined by the capacity determining unit 35 to be described later is less than the level (2), 10mV is the reference voltage, and when the heating capacity is level 3 to 8, 14mV is the reference voltage, When the output voltage of the thermocouple 22 is less than the reference voltage compared with the reference voltage, it is determined that it is a sintered combustion state or a misfire state, and fire extinguishing control is performed.

In this embodiment, a timer 34a having a clock function is provided to perform operation control not only by the operation of the operation switch 24 but also by the operation of each timer switch 44 to 46.

When each of the on timer switches 44 and 45 has been operated, the operation start operation is performed in advance of the time before the setting time so that the room temperature becomes the setting temperature at the preset time set in the timer 34a.

When the off-timer switch 46 is operated, operation start control is performed together with the operation of the off-timer switch 46 even if the operation start operation by the operation switch 24 is not performed.

In this case, when the operation is performed by the timer switches 44 to 46, the predetermined time (for example, 60 minutes) is set as the operation duration time, and the timer 34a is operated, and the operation is automatically performed after the predetermined time has elapsed. Carry out stop control and end the operation. In addition, when the off-timer switch 46 is operated again after only one operation, the timer 34a is reset and continues to operate for a predetermined time thereafter.

On the other hand, each set time for the timer operation control to be performed in accordance with each of the on-timer switches 44 and 45 is stored in a storage device attached to the timer 34a. It is stored in each memory device selected corresponding to each of the on-timer switches 44 and 45, respectively.

When the above fixation is performed in the operation control unit 34, the operation for starting operation by the operation switch 24 and the timer switches 44 to 46 is not accepted.

Therefore, when the operation is fixed during operation, only the operation for the operation stop by the operation switch 24 is accepted, and when the operation is fixed during the operation stop, only when the timer operation control by the on timer switches 44 and 45 is performed. If the operation is started before the set time and the timer operation control is not performed, the operation is not started at all unless the fix release is performed.

In the operation start control, the burner 10 is ignited after prepurging is performed for 3 seconds, and the post purge is performed for about 20 seconds after the fire extinguishing operation of the burner 10 is performed in the operation stop control. The capacity determining unit 35 determines the heating capacity, which is a reference for determining the combustion amount of the burner 10 and the applied voltage of the convection fan 8, according to the operation of the setting switch 43.

In this embodiment, eight steps from the level (1) as the weakest heating capacity to the cone level (8) with the heating capacity as the heating capacity are set in advance, and in the case of the temperature control mode, shown in FIG. As described above, the heating capacity is determined from the temperature difference between the set temperature by the setting switch 43 and the detection degree by the dummyster 23. When the temperature is set to "L" or "H" as the set temperature, the heating capacity is detected. Regardless of temperature, it is determined to be level 8 or level 1, respectively.

In the step mode, the heating capacity is selected in accordance with the operation of the setting switch 43 irrespective of the detection temperature of the dummyster 23. In addition, the capacity determining unit 35 is provided with a save operation switch 47 for preventing overheating according to the user's desire. When the save operation switch 47 is operated during operation, a save-on lamp (not shown) is turned on. At the same time, after the detection temperature by the dummyster 23 reaches the set temperature, for example, every 30 minutes elapses, the set temperature is changed as low as 1 ° C.

As a result, when the heating of the room is performed in abundance with respect to the set temperature, the actual set temperature gradually decreases with respect to the set temperature on the exterior, so that the user does not need to change the set temperature smoothly. Consumption can be suppressed.

In the initial stage of operation, the level 4 is determined to facilitate ignition of the burner 10, and when ignition is detected, the level 8 is determined for a predetermined time (15 minutes) thereafter. At the same time, the solenoid valve 20 is opened and rapid heating (hot dash) operation is performed. After a predetermined time, the rapid heating (hot dash) operation is terminated and the set temperature and the detection temperature of the dummy 23 are determined. Heating capacity is determined.

The proportional valve control unit 36 drives and controls the proportional valve 18 according to the heating capacity determined by the capability determining unit 35. Here, the variable resistor 36a, which is adjusted by manual operation, is provided so that the current value corresponding to the determined heating capacity is surely energized, and a correction value provided by the variable resistor 36a and a control value in which the determined heating capacity is synthesized. Based on this, the proportional valve 18 is driven.

The fan control unit 37 drives the convection fan 8 in accordance with the heating capacity determined by the capacity determination unit 35. Here, the variable resistors 37a and 37b which are adjusted by manual operation because they are driven at the rotational speed corresponding to the determined heating capacity are provided. As shown in FIG. 8, the determined heating capacity is the level (1, 2). In the case of, the voltage between the solid line A to the solid line B is applied on the basis of the control value combined with the correction value imparted by the variable resistor 37a and the combined heating capability, and the level (3 to 8) If, the voltage between the solid line (C) and the solid line (D) is applied to the motor of the convection fan (8) based on the correction value provided by the variable resistor (3) and the control value combined with the crystal source heating capacity. do.

As a result, even if there is a nonuniformity in the motor of the convection fan 8, the appropriate voltage corresponding to the control value is applied, and the optimum rotational speed from the high rotational speed to the low rotational rotation is obtained corresponding to each level, and the burner 10 Appropriate warmth is circulated with respect to the heating amount, so that a comfortable hot air temperature and a warm air amount for the user are ensured.

The damper control unit 38 is a function unit for driving control of the geared motor 9a provided in the damper 9, and is capable of operating in accordance with the control state of the driving control unit 34 at the start and stop of operation. Each is controlled according to the heating capacity determined by the determination unit 35.

Here, at the beginning of the operation, it is controlled in the closed state and the opening area of the hot air jet port 5 is small. For this reason, since the supply amount of combustion air is relatively reduced compared with the level 4 of the heating capacity determined by the said capacity determination part 35, and fuel gas is supplied accordingly, a mixer is gas-processed and it is easy to ignite. do.

The damper 9 is opened in response to rapid heating within a predetermined time after the burning of the burner 10 is detected. The damper 9 is always in the closed state at the level 1 and always in the open state at the level 3 or higher in accordance with the heating capacity determined by the capacity determining unit 35 after the rapid heating is completed.

In the level 2, when the heating capacity is changed from the state of level 3 or more to the level 2, the state of openness is maintained as it is, and conversely, the heating capacity is changed from level 1 to level 2. In one case, it remains closed.

On the other hand, in the post purge of the operation stop control, it is kept in an open state to increase the amount of air passing through the convection duct 7 to enable rapid cooling of the burner 10 and the convection duct 7, and the post purge ends. When it is closed, it is driven in closed state.

As a result, when the purging operation is performed, it is not necessary to make the closing state as quickly as possible, and the operation starting operation such as the purge purge can be started quickly.

Here, the open and closed states of the damper 9 are detected by a position sensor 9b composed of two microswitches provided in the drive unit of the geared motor 9a, and the control command value and the position sensor 9b are detected. The geared motor 9a is driven when the detected state of the motor is different and the geared motor 9a is not driven when the control command value and the detected state match.

In addition, there may be a case where foreign matter is mixed between the damper 9 and the hot air jetting outlet 5 so that the damper 9 does not come into a correct position. Therefore, in order to protect the geared motor 9a, the damper 9, and the like, the driving time of the geared motor 9a is limited to a maximum of 20 seconds and no further driving is performed. In the present embodiment, when the damper 9 is driven, the state change is usually completed in 5 to 6 seconds.

In the gas-heated air conditioner 1 of the present embodiment having the above configuration, at the time of adjustment at the factory, each level of the heating capacity is simply obtained, and the voltage applied to the convection fan 8 or the proportional valve corresponding to each level is achieved. It is easy to adjust the current value to (18).

In particular, in the adjustment of the applied voltage of the convection fan 8, the variable resistors 37a for the levels 1 to 2 and the variable resistors 37a for the levels 3 to 8 are set to appropriate voltages, respectively. Since it is possible to adjust, the blowing amount corresponding to each combustion amount up to the large combustion amount is obtained by the small combustion amount, and as a result, the warm air of a stable temperature can be ejected.

In the present embodiment, a hot air heater for mixing the combustion gas with indoor air and injecting the combustion gas into the indoor air is shown. FF type warm air heater may be used.

The fuel may be petroleum. Moreover, the air conditioner which ejects cold air to an indoor material may be sufficient. In this case, the proportional valve provided in the circulation pipe of the refrigerant may be controlled or the rotation speed of the refrigerant compressor may be controlled in accordance with the target control amount determined by the control amount determining means.

Claims (1)

A heating means or cooling means arranged in the blower duct, a blower 18 for generating air flow in the blower duct, and a control amount determining means for determining a target control amount of only the heating means or dangling water and determining a target control amount of the blower ( 35) and a fan control unit 37 for rolling the blower to a target value corresponding to a target control amount determined by the control amount egg-measuring means, wherein the fan control unit 37 includes the target control amount. And at least one variable resistor (37a, 37b) so as to correspond to the control unit, wherein the target value of the blower is corrected by the correction value of the variable resistor.