JPH08320145A - Air conditioner - Google Patents

Abstract

PURPOSE: To perform a fast and effective heating of an indoor area when a heating operation is started and to prevent an occupant from feeling uncomfortable state by air flow or hot air during the heating operation by a method wherein a control part controls the air direction of blown air to perform a radiation heating operation in reference to the fact that a difference between an indoor air temperature and a set temperature becomes less than a predetermined value. CONSTITUTION: When an indoor air temperature reaches a predetermined temperature detected by a temperature sensing sensor 19, a control part 17 swings louvers of an upper or lower louver mechanism 9 to change over an air direction of blowing air in a perodic manner between a slant downward direction and a direction in parallel with a ceiling. Then, as a time elapses, a rate of time for controlling it in a direction in parallel with the ceiling is set to be gradually increased in respect to a time for controlling in a slant downward direction. After a specific time elapses, an air blowing direction is fixed in a direction in parallel with the ceiling, an amount of blowing air of a lateral flow fan 7 is set to be a minimum value, thereby the operation is completely transferred to a radiation heating operation. With such an arrangement as above, both the ceiling and the dwelling space can be sufficiently heated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner equipped with a ceiling-embedded or ceiling-embedded indoor unit.

[0002]

2. Description of the Related Art Conventionally, there is an air conditioner called a ceiling-embedded type or a ceiling-embedded type having an indoor unit that is embedded in a ceiling or a bag in a room. An indoor unit of this air conditioner includes a case embedded in a ceiling or a ceiling bag, an indoor heat exchanger and a blower housed in the case, and the air sucked from the room is used as the indoor heat exchanger. After passing through to exchange heat, it is blown out again into the room.

The wind direction of the air blown into the room is generally controlled by a wind direction control plate called "louver". Conventionally, the angle of the louver has been adjusted by the occupant using a remote controller or the like based on the temperature of the room or the like, or automatically adjusted by a microcomputer provided in the air conditioner.

For example, when the temperature of the room is low, such as when heating is started, the angle of the louver is directed downward to warm the room rapidly, and when the temperature of the room rises, the angle of the louver is substantially reduced. The horizontal adjustment prevents blown hot air from directly hitting the occupants.

[0005]

The conventional embedded air conditioner described above has the following problems to be solved. That is, in the conventional air conditioner, after the temperature in the room rises, the angle of the louver is adjusted to be substantially horizontal as described above so that the occupant does not feel the air flow, and the occupant feels uncomfortable. I try to prevent it.

However, even when the louver is oriented in the horizontal direction, the blown air may collide with the wall surface in the room and may flow downward along the wall surface. For this reason, warm air convection occurs in the indoor living space, and the occupants sometimes feel uncomfortable.

On the other hand, if the louver is oriented horizontally and the blowout is weakened from the start of the heating operation, the room does not warm well and the occupant feels uncomfortable. The present invention has been made in view of such circumstances, and an object thereof is to quickly and effectively warm the room at the time of starting the heating operation, and at the same time, during the heating operation, the occupant can avoid It is an object of the present invention to provide a ceiling-embedded or ceiling-embedded air conditioner that can effectively prevent feeling uncomfortable due to warm air.

[0008]

A first means is an air conditioner having an indoor unit and a control section, wherein the indoor unit is buried in or near a ceiling in a room,
A case having a suction port and a blowout port that open to the inside of the room, a blower that is provided in the case and that allows the indoor air sucked from the suction port to flow to the blowout port and change the amount of blown air, and the case A heat exchanger provided for exchanging heat with the indoor air sucked from the suction port, and the wind direction of the blown air provided at the blowout port is controlled in a range obliquely downward from a direction substantially parallel to the ceiling surface. The upper and lower louver mechanism, and the control unit has a temperature detecting means for detecting the indoor temperature, and based on the difference between the indoor temperature and the set temperature being within a predetermined value, the wind direction of the blown air is changed. The air conditioner is characterized by performing radiant heating operation while being controlled substantially parallel to the ceiling surface.

The second means is, in the air conditioner of the first means, the control unit controls the wind direction of the blown air to the ceiling when the difference between the room temperature and the set temperature is within a predetermined value and a predetermined time has elapsed. It is characterized by having a means for permitting the radiant heating operation by controlling substantially parallel to the surface.

The third means is, in the air conditioner of the second means, the control section blows out only when the amount of air blown by the blower is minimum, if the radiant heating operation is permitted. It is characterized in that it has means for controlling the wind direction of the air substantially parallel to the ceiling surface to shift to the radiant heating operation.

A fourth means is, in the air conditioner of the second means, if the control unit is permitted to perform the radiant heating operation, the wind direction of the blown air is adjusted to the ceiling regardless of the blowing amount of the blower. It is characterized in that it has means for controlling the air blowing amount of the blower to be smaller than that of the air blow in a diagonally downward direction so as to shift to the radiant heating operation.

A fifth means is an air conditioner having an indoor unit and a controller, wherein the indoor unit is buried in or near the ceiling of the room, and has a suction port and an air outlet opening to the room. A blower which is provided in the case and which allows the indoor air sucked from the suction port to be circulated to the outlet while changing the amount of the blown air, and the indoor air which is provided in the case and sucked from the suction port. A heat exchanger for exchanging heat between them, and an upper and lower louver mechanism that is provided at the outlet and controls the wind direction of the blown air in a range from a direction substantially parallel to the ceiling surface to an obliquely downward direction, and the control unit is When the difference between the room temperature and the set temperature is within a predetermined value, the upper and lower louver mechanisms are provided so that the direction of the air blown out is substantially parallel to the ceiling surface. Air having a means for swinging in a predetermined cycle between and, and having a means for fixing the wind direction of the blown air in a direction substantially parallel to the ceiling surface after a predetermined time and shifting to radiant heating operation. It is a harmony machine.

A sixth means is the air conditioner of the fifth means, wherein the control section has means for changing the predetermined period, and the wind direction of the blown air is substantially parallel to the ceiling. It is characterized in that the time controlled in this direction is controlled to be gradually larger than the time controlled in the oblique downward direction.

A seventh means is the air conditioner of the first or fifth means, wherein the temperature detecting means of the control section is provided at the suction port, and is sucked into the case from the suction port. It is characterized in that the room temperature is detected by detecting the temperature of the room air.

An eighth means is the air conditioner of the first or fifth means, wherein the control section has an outside air temperature detecting means for detecting an outdoor temperature, and according to the detected outside air temperature, It is characterized by having a means for correcting the set temperature.

A ninth means is the air conditioner according to the first or fifth means, wherein the control section is:
When the difference between the indoor temperature and the set temperature becomes equal to or more than a predetermined value, the ceiling radiant heating operation is stopped, and a means for performing convective heating operation by controlling the wind direction of the blown air diagonally downward is characterized. It is what

A tenth means is the air conditioner of the first or fifth means, wherein the control section has a temperature detecting means for detecting an outdoor temperature, and the detected outside air temperature is below a predetermined value. If there is, it is characterized by having a means for prohibiting the transition to the radiant heating operation.

An eleventh means is an air conditioner having an indoor unit and a control section, wherein the indoor unit is buried in or near the ceiling of the room, and has a suction port and an air outlet opening to the room. A blower which is provided in the case and which allows the indoor air sucked from the suction port to be circulated to the outlet while changing the amount of the blown air, and the indoor air which is provided in the case and sucked from the suction port. A heat exchanger for exchanging heat between them, and an upper and lower louver mechanism that is provided at the outlet and controls the wind direction of the blown air in a range from a direction substantially parallel to the ceiling surface to an obliquely downward direction, and the control unit is An air conditioner having means for performing a radiant heating operation by fixing the wind direction of blown air substantially parallel to the ceiling surface after a lapse of a predetermined time from the start of the heating operation.

[0019]

According to the first means, when the heating operation is started up, warm air is directly blown out into the living space of the room to cause convection (convection heating), whereby the room temperature rises above a certain temperature. From heating to heating (radiant heating) that warms the living space by radiant heat from the ceiling surface and the warm air area near the ceiling surface, it is possible to quickly warm the room and reduce the indoor temperature after transfer to radiant heating. It can be effectively suppressed.

According to the second means, the indoor temperature rises to a certain temperature or higher and is stabilized, and then the radiant heating operation is started, thereby effectively suppressing the decrease in the indoor temperature. be able to.

According to the third and fourth means, the amount of air blown by the blower in the radiant heating operation is made smaller than that in the convective heating operation, so that the convection of warm air to the indoor living space during the radiant heating is performed. It can be prevented from waking up.

According to the fifth means, when the heating operation is started, warm air is directly blown into the living space of the room to cause convection (convection heating), whereby the room temperature rises above a certain temperature. From the above, by swinging the vertical louver mechanism up and down, transition to heating (radiant heating) that effectively warms the living space by radiant heat from the ceiling surface and the warm air area near the ceiling surface while effectively preventing a decrease in room temperature be able to.

According to the sixth means, the time during which the wind direction of the blown air is controlled in a direction substantially parallel to the ceiling is made gradually larger than the time during which the wind direction of the blown air is controlled obliquely downward. By controlling, it is possible to more effectively prevent a decrease in the room temperature when shifting to radiant heating.

According to the seventh means, the room temperature can be detected by detecting the temperature of the air sucked into the case. According to the eighth means, it is possible to perform more efficient heating by correcting the set temperature according to the level of the outside air temperature (the magnitude of the heat load). That is, when the outside air temperature is too low (when the heat load is large), the set temperature is shifted higher, and when the outside air temperature is too high (when the heat load is small), the set temperature is shifted lower.

According to the ninth means, even during radiant heating, it is possible to automatically switch to convection heating in response to a decrease in room temperature. According to the tenth means, when the outside air temperature is too low, the radiant heating cannot effectively prevent the decrease of the indoor temperature when the outside air temperature is too low. Therefore, by prohibiting the transition to the radiant heating operation, It is possible to realize heating without a drop in temperature.

According to the eleventh means, when the heating operation is started up, warm air is directly blown into the living space of the room to cause convection (convection heating) to sufficiently raise the room temperature, and then the ceiling. By switching to heating (radiant heating) that warms the living space with radiant heat from the warm air area near the ceiling and ceiling surface, it is possible to quickly warm the room and effectively suppress the decrease in room temperature after the transfer to radiant heating. can do. According to the twelfth means, the time until the transition to radiant heating can be freely set according to the increase in the room temperature.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an indoor unit of a ceiling-embedded air conditioner of the present invention, FIG. 2 is a control system of this air conditioner, and FIG. 3 is a conceptual diagram showing arrangement of this indoor unit and wind direction control. is there.

First, the basic construction of the indoor unit will be described with reference to FIG. Reference numeral 1 in the figure denotes a case embedded in the ceiling. The case 1 is provided with a suction port 2 and a blowout port 3 that open to the indoor side, and the inner surface has a heat insulating material 5.
Is covered by.

In the case 1, an indoor heat exchanger 6 is arranged at a position facing the suction port 2, and a cross flow fan (blower) 7 is arranged at a position facing the blowout port 3. . This cross-flow fan 7 is a fan motor 8 shown by a dotted line in the figure.
The indoor air sucked into the case 1 through the suction port 2 is passed through the indoor heat exchanger 6 and then circulated to the outlet port 3.

A vertical louver mechanism 9 and a horizontal louver mechanism 10 are arranged at the outlet 3. The vertical louver mechanism 9 includes a vertical louver 11 (an airflow direction adjusting plate) that is swingably supported at one end in the width direction and that opens and closes the outlet, and a vertical louver drive motor 12 that swings and drives the vertical louver 11.

The other end 11a in the width direction of the upper and lower louvers 11
The (tip portion) is led out to the outside of the edge portion of the blow-out port 3 and opened by a slight amount (for example, 20 °) so that the wind direction of the blown-out air is changed to the ceiling surface as shown in this figure and FIG. 3 (b). It can be controlled in a direction substantially parallel to. Further, by widening the opening as shown by the chain double-dashed line in FIG. 1, the wind direction of the blown-out air can be controlled obliquely downward as shown in FIG. 3 (a).

Therefore, the vertical louver mechanism 9 is constructed so that the wind direction of the blown air can be changed between a direction substantially parallel to the ceiling surface and an oblique downward direction. On the other hand, the left and right louver mechanism 10 has a plurality of central shafts 13 (only one is shown in the drawing) and the central shafts 13 as shown in FIG.
It is composed of a plurality of left and right louvers 14 which are swingably supported, and a left and right louver driving motor 15 which swings the left and right louvers 14 in the left and right directions.

The left and right louvers 14 are constructed so that, for example, the direction of the blown air can be controlled so as to gradually widen as it is blown out (switching control to wide blowout).

Next, the mounting position of the indoor unit of this air conditioner will be described with reference to FIG. FIG. 3 (a),
In (b), the dotted line indicates the height of 1.8 m from the floor surface. Considering the height of the resident, the space below the dotted line is the living space.

As shown in this figure, the indoor unit is embedded in a ceiling having a height of 1.8 m or more from the floor.
This is to prevent the occupants in the living space from feeling the air flow due to the blown air when the wind direction of the blown air is controlled as shown in FIG. 3 (b).

Next, the control system of this air conditioner will be described. As shown in FIG. 1, the control of the air conditioner is performed by a control unit (CP) provided in the case 1 of the indoor unit.
U) 17.

As shown in FIG. 2, the control unit 17 is connected to the fan motor 8, the upper and lower louver driving motors 12, and the left and right louver driving motors 15 to control each mechanism.

Further, as shown in FIG. 1, inside the suction port 2, an indoor temperature sensor 19 for detecting the temperature of the suction air is provided.
(Intake air temperature detection sensor) is provided, and this indoor temperature sensor 19 is also connected to the control unit 17. The detected value of the indoor temperature sensor 19 becomes the detected value as the temperature of the living space inside the room when the wind direction control shown in FIG. 3A is performed, and the wind direction shown in FIG. When the control is performed, the detected value is the temperature near the ceiling.

Further, as shown in FIG. 3, outside the room,
Outside temperature detection sensor 16 for detecting the outdoor temperature (outside temperature)
(Outside air temperature detection means) is provided. The outside air temperature sensor 16 may be fixed to, for example, the case of the outdoor unit of the air conditioner. The detection value of the outside air temperature sensor 16 is also input to the control unit 17 in the same manner.

Further, the air conditioner, as an external input device, sets the air flow rate of the blower, temperature setting, operation mode (cooling and heating operation, automatic operation (operation for automatically setting air volume etc.), sleep mode and radiation mode. It has a remote controller 21 (operator) for setting ON / OFF of the remote controller, etc., and this remote controller 21 is also connected to the control unit 17.

Further, an inverter circuit 22 for controlling a compressor driving motor provided in an outdoor unit or the like is connected to the control unit 17, and the control of the compressor (heating capacity is performed through the inverter circuit 22. Control).

Next, the function of the control unit 17 will be described. The control unit 17 has the following functions. First,
When the outside air temperature To is monitored from the detection value of the outside air temperature sensor 16 and the outside air temperature To is higher than the first set outside air temperature T1 determined according to the indoor set temperature Ta (when the heat load is low), , The second set outside air temperature T2 determined in the same manner
When the heat load is lower than the above (when the heat load is high), the set temperature Ta is corrected accordingly, and when the heat load is low, the set temperature Ta is shifted to a lower value, and when the heat load is high, the above set temperature Ta is set. Shift the temperature higher.

Second, when the heating operation is started, the wind direction control by the vertical louver mechanism 9 is fixed obliquely downward (see FIG. 3).
(State (a)), and the room temperature (temperature of the intake air) detected by the temperature sensor 19 is set to the set temperature Ta (for example, 2 in this embodiment) set by the remote controller 21 or the like.
(0 ° C.)-Time count t is started after reaching a predetermined temperature range (Ts), and after a predetermined time (te) has elapsed, the transition to the radiant heating operation is permitted.

Third, when the shift to the radiant heating operation is permitted, the amount of air blown by the cross flow fan 7 (blower) is set to a minimum (other than the case where the occupant manually sets it, (Including the case where the operation is set), the wind direction control by the upper and lower louver mechanisms 9 is fixed in a direction substantially parallel to the ceiling surface, and the radiant heating operation is performed (FIG. 3).
(B) state).

Fourth, when the outside air temperature To is too low with respect to the indoor set temperature Ta (when the heat load is too high), the transition to radiant heating is not permitted. Fifthly, when the indoor temperature T becomes lower than the set temperature Ta by a predetermined temperature (Td) during the sub-heat insulation, the wind direction by the upper and lower louver mechanisms 9 is changed as shown in FIG.
As shown in (a), control is performed diagonally downward, and the indoor living space is rewarmed by convection heating.

The function of the control unit 17 will be described in detail together with the operation of the air conditioner with reference to the flow charts shown in FIGS. 4 and 5 and the timing chart shown in FIG. First, the control unit 17 controls the set temperature Ta set by the resident.
The temperature (set through the remote controller 21, for example) is compared with the outside air temperature To detected by the outside air temperature sensor 16 to determine the magnitude of the heat load in the heating operation. This is because the magnitude of the heat load has a great influence on the temperature rise and temperature drop in the room.

That is, in the control unit 17, based on the first function, when the outside air temperature To is higher than the first outside air temperature T1 determined according to the set temperature Ta in the room (when the heat load is low), The set temperature Ta is a lower temperature (Ta = Ta
-Shift to To1). Further, when the outside air temperature is lower than the second temperature T2 determined according to the set outside air temperature Ta in the room (when the heat load is high), the set temperature Ta is shifted to a higher temperature (Ta = Ta + To2). Let (T
o1 and To2 are, for example, about 1 to 5 ° C.).

The temperature thus determined is set to the set temperature Ta.
As described later, by performing the operation as described above, it is possible to shift to radiant heating without lowering the temperature of the living space even when the heat load is large, and it is possible to reduce power consumption when the heat load is low.

Then, the control section 17 fixes the wind direction control by the vertical louver mechanism 9 in the obliquely downward direction based on the second function. In this state, the control unit 17 issues a command to the fan motor 8 and the inverter circuit 22, operates the compressor, and causes the air conditioner to perform heating operation.

As a result, warm air is blown obliquely downward into the indoor living space (a space of 1.8 m or less), as shown in FIG. 3 (a). Therefore, the living space in the room is directly heated by convection heating (convection heating mode).

On the other hand, the air convection in the living space is sucked into the suction port 2 of the indoor unit. That is, when convection heating is performed, the temperature T detected by the temperature sensor 19 provided in the suction port 2 represents the temperature of the living space.

The controller 17 monitors the room temperature T,
As shown in FIG. 6, the room temperature T is lower than the set temperature Ta by a predetermined temperature (Ts) Ta-Ts (for example, 20 ° C.).
(C-5C), the time count t is started based on the second function.

In this control, when a predetermined time (te) has elapsed from the start of time counting, it is determined that the temperature in the room has stabilized, and the transition to radiant heating is permitted. And
The control unit is based on the third function and only when the amount of air blown by the blower is set to the minimum in the state where the shift to the radiant heating is permitted, based on the third function.
A command is issued to the controller 12 to control the wind direction of the vertical louver mechanism 9 in a direction substantially parallel to the ceiling as shown in FIG. 3 (b). (In FIG. 6, after permitting the transition to the radiant heating at time t2, the blast amount becomes the minimum at the time t3, so the radiant heating is transitioned at this point.) That is, when the above blast amount is large This is because the blown air collides with the wall surface and flows downward along the wall surface as indicated by the dotted arrow in FIG. 3B, which may cause convection of warm air in the living space. It is generally known that a resident feels discomfort when he feels the convection of warm air after the temperature in the room has risen sufficiently.
Therefore, in the present invention, the transition to the radiant heating operation is performed only when the air flow rate is small.

When the wind direction of the blown air is controlled to be substantially parallel to the ceiling surface, the blown air is warm, so the ceiling surface is heated while convection occurs in the upper part of the room. Due to this, height 1.
A warm air convection region is formed only near the ceiling of 8 m or more, and the temperature near this ceiling is, for example, 40 degrees as shown in FIG. 1 (b).
Rise to ℃. The living space located below 1.8 m is indirectly heated by the radiant heat from the ceiling surface and the warm air region near the ceiling. As a result, "radiant heating" is performed.

As a result, the occupant in the living space can comfortably spend the warming of the room without feeling the convection of the warm air after the room is warmed. Further, when the wind direction by the vertical louver mechanism 9 is fixed substantially parallel to the ceiling, the control unit 17 switches the wind direction control of the left and right louver mechanism 10 to wide blowing. As a result, the blown air spreads to every corner of the room, and the living space is radiantly and well heated.

Although radiant heating can be operated without feeling of air flow as described above, since it is a heating that indirectly warms the living space, it is considered that the heating power is weaker than that of convection heating. To be

Therefore, when the heat load is very large, such as when the outdoor air temperature is very low, even if the indoor temperature rises and stabilizes sufficiently due to convection heating, it suddenly shifts to radiant heating. It is conceivable that the room temperature will drop. In such a case, it is rather preferable not to shift to radiant heating. Therefore, the control unit 17 controls the fourth
Based on the function of, as shown in the flowchart of FIG.
Reference temperature T2 when the outside air temperature To first determines the heat load
If the temperature is lower than the temperature T3 (T2 <T3), which is lower than that, the transition to radiant heating is not permitted.

On the other hand, after the transition to radiant heating, the temperature in the room may decrease due to the influence of the heat load as described above, the opening and closing of windows, etc. (see FIG. 6). In such a case, if the radiant heating is continued, the temperature inside the room will further drop. Therefore, the control unit 17 is configured as shown in FIG.
As shown in the flow chart of No. 2, when the temperature in the room falls below a predetermined temperature (Ta-Td (Td ≧ Ta), the radiant heating mode is released and the room is warmed by convection operation. Then, the same control as described above is performed again to shift to radiant heating as necessary.

In this embodiment, the radiation operation mode is canceled by detecting the decrease in the room temperature T, but the same control may be performed by other factors. For example, radiant heating may be stopped by opening and closing a door or a window. In this case, a sensor for detecting opening / closing of a door or a window may be provided, and the radiant heating mode may be released based on the detection value of this sensor.

According to the configuration as described above, the effects described below can be obtained. Firstly, there is an effect that it is possible to shift to radiant heating while preventing a decrease in indoor temperature.

That is, even in the case of performing radiant heating, at first, the living space is directly heated by convection heating. In addition, the transition from convection heating to radiant heating is not performed at an appropriate location, but after the temperature reaches a predetermined temperature range of the set temperature Ta-Ts, a predetermined time te elapses and the room temperature stabilizes. I made it happen.

For example, when the radiant heating operation is started before the room temperature stabilizes, the room temperature is drastically lowered after the transfer, as indicated by the alternate long and short dash line in FIG. In other words, since radiant heating heats the object indirectly rather than directly, it has a weak heating capacity, and its effect cannot be exhibited satisfactorily until the object is sufficiently warmed. is there.

Therefore, as described above, according to the present invention,
It was judged that the living space had been sufficiently warmed up by the elapse of a predetermined time after reaching the reference temperature, and the radiant heating was switched based on this. With this,
It is possible to shift to radiant heating while effectively preventing a decrease in room temperature.

It should be noted that the temperature (Ta-Ts) that is the reference for the transition to radiant heating is lower than the set temperature Ta and
By selecting and setting the temperature at which the room temperature does not drop when the process shifts to the radiant heating, there is an effect that it is possible to quickly shift to the radiant heating while obtaining the above effects.

Secondly, there is an effect that comfortable radiant heating can be performed without feeling of air flow (warm air feeling). That is, the transition to radiant heating is performed only when the amount of air blown by the cross flow fan 7 (blower) is minimum.

As a result, it is possible to effectively prevent the blown air from colliding with the wall surface of the room and flowing into the living space during radiant heating. Therefore, as shown in FIG. 3B, the warm air convection can be formed only in the space near the ceiling, and the living space can be heated only by the radiant heat from this warm air convection region. Further, when the amount of blown air is small, the warm airflow formed near the ceiling can be made extremely thin, and the warm air region can be effectively prevented from reaching the living space (1.8 m or less).

As a result, there is an effect that the occupants in the living space can be comfortably heated without feeling the airflow and warmth. The "minimum air flow rate" in the present invention can be set freely according to the size of the room, for example. That is, the room is small and the distance from the outlet of the indoor unit to the wall surface in the room (X in FIG.
Is small) and the room is large and the distance from the outlet to the wall surface in the room is large, it is better to make the former "minimum air flow" smaller than the latter in the living space during radiant heating. It is preferable in preventing convection of warm air.

Thirdly, there is an effect that comfortable heating can be performed according to the heat load. That is, in the present invention, the set temperature T
The value "a" was moved up and down according to the magnitude of the heat load. With this, when the heat load is high, it is possible to delay the time to shift to the radiant heating operation (shift after the temperature of the living space is higher and stable), and The temperature drop can be effectively prevented.

Further, when the heat load is low, it is considered that the temperature decrease rate of the living space is low. Therefore, there is an effect that the radiant heating can be performed more quickly by advancing the time to shift to the radiant operation. . Further, in this case, there is an effect that power saving can be achieved.

Further, when the heat load is very high, the transition to radiant heating is prohibited. As a result, there is an effect that heating can be performed without lowering the indoor temperature. That is, when the outside air temperature is extremely low, it is considered that the temperature decrease of the indoor living space cannot be prevented even if the transition time to the radiant heating is delayed. This is because, in this case, prohibiting the transition to radiant heating leads to better heating of the room.

Fourthly, it is conceivable that the temperature in the room will drop sharply for some reason after the transfer to radiant heating. For example, there is a temperature drop due to the opening and closing of doors as people enter and leave and the opening and closing of windows for ventilation. In this case, the radiant heating is stopped and the convection heating is performed again, so that there is an effect that the temperature of the living space in the room can be quickly recovered.

Next, a second embodiment of the present invention will be described with reference to the flow chart of FIG. 7 and the timing chart of FIG. The second embodiment relates to control at the time of transition to radiant heating, and the basic configuration and the process (flow chart shown in FIG. 4) up to permission of transition to radiant heating operation are The same as in the first embodiment.
Therefore, the same components are given the same reference numerals and the description thereof is omitted.

That is, in the first embodiment, the actual transition to the radiant heating is performed only when the amount of air blown by the blower is minimum, but in this embodiment, regardless of the amount of air blown. , Make the transition to radiant heating.

Therefore, as shown in FIG. 7, the control unit 17 controls the vertical louver driving motor 12 (vertical louver mechanism 9) if permission to radiant heating is given. Then
It has a function of controlling the air flow direction of the blown air substantially parallel to the ceiling and of setting the amount of air blown by the cross flow fan 7 to a minimum.

Therefore, as shown in FIG. 8, if the time te elapses after the room temperature reaches Ta-Ts,
Even if the amount of blown air is not the minimum, the direction of the blown air is forcibly controlled to be parallel to the ceiling, the amount of blown air is also set to the minimum, and the transition to radiant heating is completed.

According to such a configuration, the radiant heating can be swiftly changed regardless of the air flow rate, and the air flow rate can be reduced, so that the occupants living in the living space during the radiant heating operation can do so. It is possible to effectively prevent the feeling of warmth.

Next, regarding the third embodiment, the flow of FIG.
This will be described with reference to the chart and the timing chart of FIG. In the first and second embodiments, the room temperature reaches a predetermined temperature (Ta-Ts) and then a predetermined time (te).
Although the transition to the radiant heating was made based on the passage of the time, in this embodiment, as shown in the timing chart of FIG.
When a predetermined time (ti) has elapsed after starting the above, the shift to the radiant heating operation is permitted.

That is, this embodiment shows an improvement of the control up to the permission of the radiant heating operation in the first and second embodiments, and this control is shown in the flowchart of FIG. It was

In order to perform such control, the control unit 1
7 is the set temperature Ta input from the remote controller 21,
Radiation is appropriately performed from the start of operation based on the magnitude of the heat load obtained based on the outside air temperature To detected by the outside air temperature sensor 16 and the set temperature Ta, the indoor temperature T detected by the indoor temperature sensor 19, and the like. It has a function of determining the time ti required before shifting to the operation.

Then, as shown in the flow chart of FIG. 9, when the predetermined time ti has elapsed from the start of the operation, the radiant heating is performed except when the outside air temperature is too low to perform the radiant heating. Allow migration.

Then, the transition to the radiant heating is actually performed by the same control as the control of the first embodiment shown in FIG. 5 or the second embodiment shown in FIG. According to such a configuration, it is possible to set a time period in which it is considered that the room temperature is stable and the room temperature does not decrease even if the room temperature shifts to the radiant heating, and the room temperature shifts to the radiant heating after such time has elapsed. it can. Therefore, the same effect as that of the first embodiment can be obtained.

Next, a fourth embodiment will be described with reference to the flow chart of FIG. 11 and the timing chart of FIG. 12 (a). In the first and second embodiments, the transition to the radiant heating is performed based on the passage of the predetermined time (te) after the room temperature reaches the predetermined temperature (Ta-Ts). In this embodiment, FIG. 12 (a)
If the room temperature reaches a predetermined temperature (Ta-Ts), the wind direction control by the louver mechanism 9 is performed between the oblique downward direction and the direction substantially parallel to the ceiling, as shown in the timing chart of FIG. It is made to swing and gradually shift to radiant heating.

Therefore, as shown in the flow chart of FIG. 11, the control section 17 determines that the room temperature T is equal to the predetermined temperature T.
When the temperature reaches a-Ts, the louver of the upper and lower louver mechanism 9 is swung to cause the wind direction of the blown air to be obliquely downward and parallel to the ceiling except when the outside air temperature is too low for performing radiant heating. Periodically switch between and. Then, with the passage of time, the ratio of the time for controlling in the direction parallel to the ceiling is gradually increased with respect to the time for controlling in the diagonally downward direction.

After a lapse of a certain time, the direction of the blown air is fixed in a direction parallel to the ceiling, and the amount of air blown by the cross flow fan 7 is set to the minimum, whereby the radiant heating is completely performed. .

According to such a configuration, by swinging the louver, the space near the ceiling and the living space inside the room can be sufficiently warmed before completely shifting to radiant heating. It is possible to effectively prevent the temperature of the living space inside the room from dropping after the heating is switched to heating.

In this embodiment, the controller 17 controls the set temperature Ta, the outside air temperature To detected by the outside air temperature sensor 16 and the heat load obtained based on the set temperature Ta, and A function of determining the ratio (cycle) of the swing time and the control time in each direction may be provided based on the room temperature T detected by the room temperature sensor 19 and the like.

Further, as shown in FIG. 12 (b), a constant effect can be obtained even if the swing cycles are equal. It should be noted that the present invention is not limited to the above-mentioned one embodiment, and can be variously modified without changing the gist of the invention.

For example, in the above embodiment, the indoor unit having only one outlet 3 is used, but as shown in FIG. 13, the case is provided with a suction port at the center thereof. You may make it use the indoor unit of the both-side blowout which provided the two outlets 3 on both sides.

When this indoor unit is used, this indoor unit should be installed in the substantial center of the ceiling, and similarly, the minimum air flow rate should be determined according to the distance between the outlet 3 and the wall surface in the room. You can

Further, although the case where the present invention is applied to the air conditioner having the ceiling-embedded indoor unit has been described in the above-mentioned first embodiment, the present invention is not limited to this, and as shown in FIG. It may be applied to an air conditioner having an indoor unit embedded in a top bag provided at a height of 1.8 m or more.

The point is that the air conditioner has an indoor unit installed at a position higher than the living space.
When the ceiling height is very high, for example, 4 m, by embedding it on the wall surface of the room having a length of 1.8 m or more, it is possible to obtain substantially the same effect as in the above embodiment.

Although the living space in the room is set to 1.8 or less in the above embodiment, the present invention is not limited to this. For example, 2.0 m or less is defined as the living space, and the indoor space is defined as follows. You may make it install a unit to 2.0 m or more.

[0093]

As described above, according to the above-mentioned invention, when the heating is started, the convection heating is first performed, and then the radiant heating is performed. Further, the transition from convection heating to radiant heating is performed when the room temperature is within a predetermined temperature range lower than the set temperature and is stable.

As a result, there is an effect that the radiant heating can be rapidly shifted while effectively preventing the decrease of the indoor temperature. In addition, by switching to radiant heating when the amount of blown air is minimum, it is possible to perform comfortable heating that does not make the occupants feel warm air during radiant heating.

On the other hand, by swinging the upper and lower louver mechanisms up and down after the room temperature falls within the predetermined temperature range, it is possible to effectively prevent a decrease in room temperature and shift to radiant heating. In this case, the same effect can be obtained.

Further, by correcting the set temperature according to the level of the outside air temperature (the size of the heat load), even if the heat load is large, it is possible to prevent the decrease in the room temperature during the transition to radiant heating, and the heat load is small. In this case, there is an effect that operation with low power consumption can be performed. Further, when the heat load is too large, the radiant heating is prohibited so that comfortable heating with less temperature decrease can be performed.

Further, even during the radiant heating, the convective heating is automatically switched to reheat the room in response to the decrease in the room temperature, so that the deficiency of the radiant heating can be compensated and the indoor temperature decrease can be effectively prevented. You can

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an indoor unit showing an embodiment of the present invention.

FIG. 2 is a block diagram showing a control system of the same.

FIG. 3 is a conceptual diagram showing the flow of warm air during heating.

FIG. 4 is likewise a flow chart showing the first embodiment.

FIG. 5 is likewise a flow chart showing the first embodiment.

FIG. 6 is also a timing chart showing the first embodiment.

FIG. 7 is likewise a flow chart showing a second embodiment.

FIG. 8 is also a timing chart showing a second embodiment.

FIG. 9 is likewise a flow chart showing a third embodiment.

FIG. 10 is also a timing chart showing a third embodiment.

FIG. 11 is also a flowchart showing a fourth embodiment.
To.

FIG. 12 is also a timing chart showing a fourth embodiment.

FIG. 13 is a schematic configuration diagram showing another embodiment.

FIG. 14 is a schematic configuration diagram showing another embodiment.

[Explanation of symbols]

1 ... Case, 2 ... Suction port, 3 ... Air outlet, 6 ... Heat exchanger,
7 ... Cross-flow fan (blower), 9 ... Vertical louver mechanism, 10
... left and right louver mechanism, 16 ... outside air temperature sensor (outside air temperature detecting means), 17 ... control unit, 19 temperature sensor (temperature detecting means).

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takuya Shimokawa 336 Tatehara, Fuji City, Shizuoka Prefecture, Toshiba Corporation Fuji Factory (72) Inventor Shoichiro Shirakawa 336, Tatehara Fuji City, Shizuoka Prefecture, Toshiba Corporation Fuji Factory (72) Inventor Sasaki, 336 Tatehara, Fuji, Shizuoka Prefecture, TOSHIBA Corporation, Fuji Factory (72) Inventor, Takehiko Watanabe, 336, Tatehara, Fuji City, Shizuoka Prefecture, Toshiba, Fuji Factory, Ltd.

Claims (11)

[Claims] 1. An air conditioner having an indoor unit and a controller, wherein the indoor unit is embedded in or near the ceiling of the room, and has a suction port and an air outlet opening to the room; Heat exchange between a blower that is provided inside and that allows the indoor air that has been sucked in from the suction port to flow to the blowout port and that can change the amount of blown air, and the room air that is provided in the case and that has been sucked in from the suction port And a vertical louver mechanism that is provided at the outlet and controls the wind direction of the blown air in the range from the direction substantially parallel to the ceiling surface to the diagonally downward direction, and the control unit controls the indoor temperature. In addition to having temperature detection means for detecting, the radiant heating operation is performed by controlling the wind direction of blown air almost parallel to the ceiling surface when the difference between the room temperature and the set temperature is within a predetermined value. Air conditioner, characterized in that. 2. The air conditioner according to claim 1, wherein the control unit causes the wind direction of the blown air to be substantially parallel to the ceiling surface when a difference between the room temperature and the set temperature is within a predetermined value for a predetermined time. An air conditioner having means for controlling to perform radiant heating operation. 3. The air conditioner according to claim 2, wherein the control unit changes the air flow direction of the blown air only when the amount of air blown by the blower is minimum if the radiant heating operation is permitted. An air conditioner characterized by having a means for controlling to be substantially parallel to a ceiling surface and shifting to radiant heating operation. 4. The air conditioner according to claim 2, wherein, if the radiant heating operation is permitted, the control unit causes the wind direction of the blown air to be substantially parallel to the ceiling surface regardless of the amount of air blown by the blower. And an air conditioner that controls the amount of air blown by the blower to be smaller than the amount of air blown in an obliquely downward direction to shift to radiant heating operation. 5. An air conditioner having an indoor unit and a control section, wherein the indoor unit is embedded in or near the ceiling of the room and has a suction port and an air outlet opening to the room; Heat exchange between a blower that is provided inside and that allows the indoor air that has been sucked in from the suction port to flow to the blowout port and that can change the amount of blown air, and the room air that is provided in the case and that has been sucked in from the suction port And a vertical louver mechanism that is provided at the outlet and controls the wind direction of the blown air in the range from the direction substantially parallel to the ceiling surface to the diagonally downward direction, and the control unit controls the indoor temperature. When the difference between the room temperature and the set temperature is within a predetermined value, the upper and lower louver mechanisms are provided to detect the temperature direction of the air blown between the direction substantially parallel to the ceiling surface. And means for swinging at a constant period,
An air conditioner comprising means for fixing the wind direction of the blown air in a direction substantially parallel to the ceiling surface after a lapse of a predetermined time to shift to radiant heating operation. 6. The air conditioner according to claim 5, wherein the control unit has means for changing the predetermined cycle, and the means controls the wind direction of the blown air to be substantially parallel to the ceiling. The air conditioner is characterized in that the operating time is controlled to be gradually larger than the time during which the wind direction of the blown-out air is controlled obliquely downward. 7. The air conditioner according to claim 1 or 5, wherein the temperature detecting means of the control section is provided at the suction port,
An air conditioner, wherein the room temperature is detected by detecting the temperature of the room air sucked into the case from the suction port. 8. The air conditioner according to claim 1 or 5, wherein the control section has an outside air temperature detecting means for detecting an outdoor temperature, and the set temperature is set according to the detected outside air temperature. An air conditioner having means for correcting the above. 9. The air conditioner according to claim 1 or 5, wherein the controller controls the ceiling radiant heating if the difference between the indoor temperature and the set temperature becomes a predetermined value or more during the radiant heating operation. An air conditioner having means for stopping operation and controlling the wind direction of blown air obliquely downward to perform convection heating operation. 10. The air conditioner according to claim 1 or 5, wherein the control section has a temperature detecting means for detecting an outdoor temperature, and if the detected outside air temperature is below a predetermined value, the radiant heating is performed. An air conditioner having means for prohibiting transition to operation. 11. An air conditioner having an indoor unit and a control unit, wherein the indoor unit is embedded in a ceiling of a room or near the ceiling, and has a suction port and an air outlet opening to the room, and this case. Heat exchange between a blower that is provided inside and that allows the indoor air that has been sucked in from the suction port to flow to the blowout port and that can change the amount of blown air, and the room air that is provided in the case and that has been sucked in from the suction port And a vertical louver mechanism that is provided at the outlet and controls the wind direction of the blown air in a range obliquely downward from a direction substantially parallel to the ceiling surface, and the control unit starts the heating operation. An air conditioner having means for fixing the wind direction of the blown air substantially parallel to the ceiling surface and performing a radiant heating operation after a predetermined time has elapsed.