JP2012102904A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner that improves driving comfort and reduces power consumption during driving.SOLUTION: The air conditioner C includes a room temperature measuring means 11 of measuring a room temperature in a room, blowout direction change means 12, 13 of changing a direction of blowing out air, and setting input means (r) of inputting settings of operation. The air conditioner C blows air substantially downward when a compressor 2 is in heating operation at a rotational frequency N1. The air conditioner also includes a control part which performs control so that when a difference between the room temperature measured by the room temperature measuring means 11 and a set temperature input to the setting input means (r) is equal to or higher than a predetermined value during the heating operation and the state is maintained for a predetermined time, the compressor 2 operates at a rotational frequency lower than the N1, and the blowout direction change means 12, 13 blow air upward from the substantially downward direction.

Description

  The present invention relates to an air conditioner, and more particularly to an air conditioner that can perform air conditioning that reduces power consumption while maintaining comfort during operation.

The ratio of the power consumption of home air conditioners to the total power consumption of general households is large. For this reason, in the discussion of energy saving caused by global warming problems and resource depletion, it is important to reduce the power consumption of home air conditioners.
On the other hand, the comfort in the building has been improved by the progress of the air conditioner.
Therefore, an air conditioner having a function of reducing power consumption without impairing comfort is required.

  In the technology related to the conventional air conditioner, as shown in Patent Document 1, when the room temperature approaches the set temperature during heating operation, the wind direction blown downward is switched to the horizontal direction, and the room temperature and the set temperature are a predetermined temperature. When there is a difference, there is one that attempts to lower the warm air staying near the ceiling to the floor by switching the wind direction downward.

  Further, Patent Document 2 includes a temperature detection sensor inside the indoor unit, a first temperature sensor installed in the user's living area, and a second temperature sensor installed outside the living area, so that only the living area is comfortable. It is described that the operation for reducing the power consumption by making it and the operation for making the wide area comfortable by making the residential area and the non-residential area comfortable.

  Furthermore, as shown in Patent Document 3, it has a main remote control placed in the living area and a sub-remote control installed outside the living area, and only one of the areas is comfortable according to the presence / absence of the user outside the living area. In some cases, the power consumption is reduced.

  Patent Document 4 describes that a first temperature sensor and a second temperature sensor are provided, and when one of the temperature sensors fails, the other temperature sensor is used to continue comfortable control. Has been.

Japanese Patent No. 3182439 Japanese Patent No. 33788781 Japanese Patent No. 3423197 JP-A-9-196447

By the way, in the case of the operation state described in Patent Document 1, the rotational speed (rotational speed) of the compressor under the condition where the room temperature and the set temperature of the user are close for the purpose of blowing down the warm air staying near the ceiling downward. Then, it will blow out downward from the indoor unit. Therefore, at the initial stage, air that is not warmly heat-exchanged by the heat exchanger is blown downward, and the user may be cold due to direct contact with an airflow that is not heat-exchanged (danger).
Further, in such an operating state, since the rotation speed (rotation speed) of the compressor is the same as the conventional one, the energy consumption is the same and does not contribute to the reduction of the power consumption.

  In the case of a highly airtight and highly heat-insulated house, the heat supplied to the room by heating is less leaked to the outside, so that the temperature of the air near the ceiling is increased in a relatively short time. In this case, when switching from heating that blows out high temperature to heating that blows down low-temperature warm air staying in the vicinity of the ceiling, the amount of heat leaked from the room to the outside becomes small as the distribution of the room temperature in the vertical direction becomes uniform. However, an air current that is not heat-exchanged from the vicinity of the ceiling is blown to the user's feet, and the user may feel uncomfortable due to the cold caused by the air flow that is blown (danger).

On the other hand, when supplying high-temperature warm air by heating in a room with low airtightness, cold air with high molecular density entering the room from outside the room stays at the user's feet, and warm air with low molecular density immediately after being blown out. Ascend quickly and stay near the ceiling.
Therefore, in the case of a room with low airtightness, in the conventional technology, even if cold air stays near the floor, which is the area where the user lives, the temperature sensor detects the warm air staying near the ceiling. When the heating that blows out the air is switched to the heating that blows off the warm air that stays near the ceiling, an air current that does not have enough heat is generated near the floor where the cold air stays, and the user feels uncomfortable due to the cold (There is a risk.

Also, in the case of operating states as in Patent Documents 2 and 3, the set temperature cannot be changed by the sub remote controller, and the set temperature can be lowered even when the heating load in the sub remote controller area is reduced by solar radiation. There is a risk that the user may be uncomfortable due to heat.
In addition, the sub remote control is fixed in a different area from the main remote control. When changing the sub remote control area, remove the sub remote control attached to the wall, reset the location information, and then reset the area There is a trouble of fixing again.

On the other hand, in the driving state as in Patent Document 4, when one of the temperature sensors fails, the other temperature sensor becomes effective and driving reliability is improved, but the user's comfort is improved and the power consumption is reduced. Is not a contributing technology.
In view of the above situation, an object of the present invention is to provide an air conditioner that improves driving comfort and reduces power consumption during driving.

  In order to achieve the above object, the air conditioner according to the first aspect of the present invention receives room temperature measuring means for measuring room temperature in the room, blowing direction changing means for changing the blowing direction of the blowing air, and operation settings. An air conditioner that blows out the blown air substantially downward when the compressor is in the heating operation at the rotation speed N1, and the room temperature measured by the room temperature measuring means during the heating operation. When the difference from the set temperature input to the setting input means is a predetermined value or more and the state is maintained for a predetermined time, the compressor is operated at a rotation speed less than N1, and the blowing direction changing means A control unit is provided for controlling the blown air to blow upward from the substantially downward direction.

  The air conditioner according to the second aspect of the present invention includes a room temperature measuring means for measuring a room temperature in a room, a blowing direction changing means for changing a blowing direction of the blowing air, a setting input means for inputting operation settings, an air An air conditioner that blows the blown-out air substantially downward by the blowing direction changing means when the compressor is in a heating operation at a rotational speed of N1 and the through-flow fan is operated at the rotational speed of n1. In the heating operation, when the difference between the room temperature measured by the room temperature measurement unit and the set temperature input to the setting input unit is a predetermined value or more and the state is maintained for a predetermined time, the compressor is The cross-flow fan is operated at a rotational speed less than n1 while being operated at a rotational speed less than N1, and the blown-out air is moved in the substantially downward direction by the blow-out direction changing means. A control unit for controlling to blow in Riue direction are provided.

  An air conditioner according to a third aspect of the present invention includes room temperature measuring means for measuring room temperature in a room, blowing direction changing means for changing the blowing direction of blown air, and setting input means for inputting operation settings. The air conditioner that blows out the blown air in a substantially horizontal direction when the compressor is in cooling operation at the rotational speed N2, and is measured by the set temperature input to the setting input means and the room temperature measuring means during cooling operation. When the difference from the room temperature is equal to or greater than a predetermined value and the state is maintained for a predetermined time, the compressor is operated at a rotation speed less than the N2, and the blown air is changed to the substantially horizontal by the blowing direction changing means. The control part which controls to blow out from the direction below is provided.

  An air conditioner according to a fourth aspect of the present invention includes a room temperature measuring means for measuring a room temperature in a room, a blowing direction changing means for changing a blowing direction of the blowing air, a setting input means for inputting operation settings, an air An air conditioner that blows out the blown-out air in a substantially horizontal direction by the blowing direction changing means, wherein the compressor is operated at the rotation number n2 during cooling operation at a rotation speed of N2. In the cooling operation, when the difference between the set temperature input to the setting input means and the room temperature measured by the room temperature measuring means is a predetermined value or more and the state is maintained for a predetermined time, the compressor The cross-flow fan is operated at a rotational speed lower than N2 and the cross-flow fan is operated at a rotational speed lower than n2, and the blown-out air is changed to the substantially horizontal by the blow-out direction changing means. It is provided with a control unit for controlling to blow downward from the direction.

  ADVANTAGE OF THE INVENTION According to this invention, the air conditioner which improves the comfort at the time of driving | operation and reduces the power consumption at the time of driving | operation can be implement | achieved.

The figure which shows the refrigerating cycle of the air conditioner of embodiment. (a) is a front view of the indoor unit visually observed by the user in the room of the embodiment, (b) is a cross-sectional view taken along the line AA of the indoor unit of (a), and (c) is for operating the indoor unit. The front view of a remote control. (a), (b), (c) is the figure which shows the position of the louver of an indoor unit when performing heating operation with the large heating capacity of the comparative example (conventional), respectively, (d), (e), (f) is a figure which shows the position of a louver when heating operation is carried out with the large heating capacity of each embodiment. (a) is a figure when the room air is not stirred during heating operation, and (b) is a figure when the room air is stirred. The figure which shows the control flow at the time of the heating operation of a comparative example (conventional). (a), (b), (c), and (d) show the change in room temperature with respect to the time of heating operation of the comparative example (conventional), the rotational speed of the cross-flow fan, the direction of the louver, and the rotational speed of the compressor, respectively. FIG. The figure which shows the control flow at the time of heating operation of embodiment. (a), (b), (c), (d) is a figure which shows the change of the room temperature with respect to the time at the time of heating operation of embodiment, the rotation speed of a once-through fan, the direction of a louver, and the rotation speed of a compressor, respectively. The figure which shows the control flow at the time of the cooling operation of a comparative example (conventional). (a), (b), (c), and (d) show the change in room temperature with respect to the time of heating operation of the comparative example (conventional), the rotational speed of the cross-flow fan, the direction of the louver, and the rotational speed of the compressor, respectively. FIG. The figure which shows the control flow at the time of the air_conditionaing | cooling operation of embodiment. (a), (b), (c), (d) is a figure which shows the change of the room temperature with respect to the time at the time of the air_conditionaing | cooling operation of embodiment, the rotation speed of a once-through fan, the direction of a louver, and the rotation speed of a compressor, respectively.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows a refrigeration cycle of the air conditioner C of the embodiment.
The air conditioner C of the embodiment is connected to the indoor unit 7 that cools or heats the room by heat exchange of the refrigerant in the refrigeration cycle, and the refrigerant is exchanged between the indoor unit 7 and the refrigerant pipe 4 of the refrigeration cycle. And an outdoor unit 9. The refrigerant in the refrigeration cycle flows through the refrigerant pipe 4 and circulates between the indoor unit 7 and the outdoor unit 9.

The refrigeration cycle of the air conditioner C includes a compressor 2 that compresses a low-temperature / low-pressure gas refrigerant into a high-temperature / high-pressure gas refrigerant, and releases heat from the high-temperature / high-pressure gas refrigerant at room temperature / high pressure during heating. The indoor heat exchanger 5 as a condenser for converting into a liquid refrigerant, the expansion valve 8 for converting the room temperature / high pressure liquid refrigerant into a low temperature / low pressure liquid refrigerant and releasing the heat, and the low temperature / low pressure liquid refrigerant during the heating process An outdoor heat exchanger 10 serving as an evaporator that absorbs and converts the refrigerant into a low-temperature and low-pressure gas refrigerant.
During cooling, the indoor heat exchanger 5 and the outdoor heat exchanger 10 play a role opposite to that during heating, and the indoor heat exchanger 5 absorbs indoor heat.

The indoor unit 7 disposed indoors includes an indoor heat exchanger 5 and a cross-flow fan 6 that blows out the air flow heat-exchanged by the indoor heat exchanger 5 into the room.
The outdoor unit 9 arranged outdoors promotes heat exchange between the refrigerant circulating in the compressor 2, the four-way valve 3 that switches the flow path of the refrigerant pipe 4, the outdoor heat exchanger 10, and the outdoor heat exchanger 10 and the outside air. The fan 1, the expansion valve 8, etc. which generate the airflow for this are provided.

FIG. 2A shows a front view of the indoor unit 7 that is visually observed by the user indoors, and FIG. 2B shows a cross-sectional view of the indoor unit 7 of FIG. c) shows a front view of the remote controller r for operating the indoor unit 7.
Inside the indoor unit 7, a room temperature sensor 11 that detects the room temperature and obtains environmental information (operation information) of the indoor unit 7 is provided.
At the lower part of the indoor unit 7 shown in FIG. 2 (b), when the air flow which is opened during operation and exchanges heat with the refrigerant in the indoor heat exchanger 5 is blown out toward the room, the air direction is changed in the vertical (vertical) direction. The louvers 12 and 13 to be changed are provided.

The air conditioner C is controlled by a control unit (not shown). The control unit includes a microcomputer, an interface circuit, an A / D / D / A converter, an amplification circuit that amplifies the detection current of the room temperature sensor 11, a drive circuit such as the compressor 2, and the like. It should be noted that the embodiment is not limited to this configuration as long as the control unit can perform a predetermined function.
The user operates a remote controller r shown in FIG. 2 (c) toward the indoor unit 7, wirelessly sends an operation command signal to the control unit of the indoor unit 7, and the desired indoor unit 7 is transmitted by the control unit. Is operated.

Next, the positions of the louvers 12 and 13 of the indoor unit 7 of the comparative example (conventional) during heating and the positions of the louvers 12 and 13 of the indoor unit 7 of the embodiment will be described with reference to FIG.
3A to 3C show the positions of the louvers 12 and 13 of the indoor unit 7 of the comparative example (conventional) when the heating operation is performed with a large heating capacity, and FIGS. f) shows the position of the louvers 12 and 13 of the embodiment when the heating operation is performed with a large heating capacity.
3A to 3F, the white arrows indicate the air blown out by the louvers 12 and 13 of the indoor unit 7 of the comparative example (conventional) or the embodiment, and the direction is the blowing direction. The size represents the wind speed.

  At the initial stage of heating, as shown in FIG. 3 (a) of the comparative example and (d) of the embodiment, the indoor air passes through the indoor heat exchanger 5 and the warm air exchanged with the refrigerant is converted into the louver 12. , 13 is blown down at a relatively high wind speed in a substantially downward direction (for example, a direction within a range of ± 20 ° from the vertical direction). Thereby, warm air is supplied to the vicinity of the floor of the living area of the user 14 where cold air is likely to accumulate, and heating is performed. High-temperature warm air has a low density of gas molecules, while cold air has a high density of gas molecules. Therefore, to supply high-temperature warm air near the floor during heating, the warm air is blown out substantially downward at a relatively high wind speed. It is necessary.

  FIG. 3B of the comparative example (conventional) at the next stage of heating and FIG. 3E of the embodiment show that the actual room temperature measured by the room temperature sensor 11 is more predetermined than the set room temperature set by the user. The position of the louvers 12 and 13 in the comparative example (FIG. 3B) when the control unit determines that the temperature has increased by 1 ° C. (for example, 1 ° C.) and the position of the louvers 12 and 13 in the embodiment (FIG. 3E). )).

  In FIG. 3B (comparative example) and FIG. 3E (embodiment), since the actual room temperature is higher than the room temperature set by the user (for example, 1 ° C.), it is necessary to supply high-temperature warm air. The control unit determines that there is no rotation and stops the rotation (operation) of the compressor 2. Therefore, although the louvers 12 and 13 are directed substantially downward, the cross-flow fan 6 in the indoor unit 7 is also stopped or operated at a low rotational speed, and the indoor air that is not heat-exchanged is used in the living area of the user 14. It is controlled not to blow down near the floor.

  In FIG. 3B (comparative example) and FIG. 3E (embodiment), the louvers 12 and 13 are directed substantially downward, but the cross-flow fan 6 in the indoor unit 7 is stopped or rotated at a low speed. Therefore, even if the louvers 12 and 13 are directed upward from a substantially lower direction (for example, 45 ° upward from the vertical downward direction), heat is exchanged near the floor of the user's 14 living area. Never supply air.

  FIG. 3C (comparative example (conventional)) shows the positions of the louvers 12 and 13 when the actual room temperature is lower or higher than a room temperature set by the user by a predetermined value (for example, 2 ° C.). Further, in FIG. 3F (embodiment), the actual room temperature is higher than the room temperature set by the user by a predetermined value (for example, 2 ° C.), and the difference is not less than the predetermined value for a predetermined time (for example, 5 The position of the louvers 12 and 13 of the indoor unit 7 and the wind direction and speed at that time are shown.

  In FIG. 3C (comparative example (conventional)), when the difference between the set room temperature and the actual room temperature reaches a predetermined value (for example, 2 ° C.) (for example, the actual room temperature is 2 ° C. lower or higher than the set room temperature). ), The louvers 12 and 13 of the indoor unit 7 are directed substantially downward, and the cross-flow fan 6 of the indoor unit 7 is rotating at a relatively high rotational speed so as to obtain a relatively high wind speed. When the difference between the set room temperature and the room temperature is small, it is considered that the warm air is sufficiently supplied to the room and the warm air stays near the ceiling. The positions of the louvers 12 and 13 in the comparative example supply warm air near the floor of the living area of the user 14 by blowing the warm air near the ceiling substantially downward by the cross-flow fan 6 rotating at a relatively high rotational speed. I am trying. In the case of recent highly airtight and highly insulated houses, it is possible to reduce the amount of heat flowing out (leakage) from the room to the outside by such control.

However, in such control, there is a case where the user 14 feels uncomfortable in the cold (risk) by directly receiving a non-warm airflow that is not heat exchanged by the indoor heat exchanger 5 of the indoor unit 7.
When the difference between the set room temperature and the actual room temperature in FIG. 3F (embodiment) after passing the state of FIG. 3E (embodiment) becomes a predetermined value (for example, 2 ° C.) (for example, actual When the room temperature is 2 ° C lower or higher than the set room temperature), the louvers 12 and 13 are directed upward from a substantially lower direction (for example, a range of ± 10 ° C from the horizontal direction to the upper and lower direction) and compared so that the wind speed is relatively large. The cross-flow fan 6 of the indoor unit 7 is rotated at a relatively high rotational speed.

If the room temperature is higher than the set room temperature, and the difference between the room temperature and the set room temperature (set temperature) is large, and this state is maintained for a predetermined time, the temperature difference in the vertical direction of the room due to the stirring of the room air It is considered that a sufficient amount of warm air stays in the vicinity of the ceiling.
Therefore, as shown in FIG. 3 (f) (embodiment), it is a living area of the user 14 because the indoor unit 7 blows out from the louvers 12, 13 upward substantially downward and convects the warm air near the ceiling. The air flow that is not heat exchanged is not directly provided near the floor, and the user 14 does not feel uncomfortable due to the cold due to the air flow.

  In this case, since the cross-flow fan 6 is rotated at a relatively high rotational speed, the blown air from the indoor unit 7 is blown upward from a substantially lower direction, so the direction of the blown air is changed by a wall or the like. Warm air staying near the ceiling is supplied to the vicinity of the floor of the user's 14 living area while reducing the speed. Since the wind speed of the warm air supplied near the floor of the user's 14 living area is low, the warm air can be supplied to the living area of the user 14 without causing the user 14 to feel cold due to the airflow.

  That is, blowing out from the indoor unit 7 in the substantially downward direction near the floor of the user's 14 living area with the louvers 12 and 13 (see FIG. 3C) is accompanied by the supply of warm air to the user's 14 living area. However, the louvers 12 and 13 blow out upward from substantially the lower direction of the user's living area without causing the user 14 to feel the cold due to the air current. It becomes possible to supply warm air to the living area of the user 14.

In addition, after maintaining a state where the difference between the room temperature and the set room temperature is greater than a predetermined value for a predetermined time, it is possible to reliably retain a sufficient amount of warm air near the ceiling to be supplied to the user's 14 living area. It becomes. Therefore, after maintaining a state in which the difference between the room temperature and the set room temperature is greater than a predetermined value for a predetermined time, the louvers 12 and 13 are blown upward from a substantially lower direction so that the space between the vicinity of the ceiling and the living area of the user 14 is increased. In this way, convection of air is caused and the temperature difference in the vertical direction can be reduced.
Therefore, it is possible to supply warm air to the vicinity of the floor in the living area of the user 14 without causing the user 14 to feel uncomfortable with the cold due to the airflow, and to improve the comfort of the user 14.

  Further, since the rotational speed of the compressor 2 is reduced when the air is blown upward substantially from the lower direction, the consumption is higher than the operation of the compressor 2 of the comparative example (conventional) in FIG. It becomes possible to reduce the amount of electric power. Furthermore, by making the temperature distribution in the vertical direction uniform, it is possible to reduce the outflow of heat from the room to the outdoors (details will be described later), and it is possible to reduce the power consumption.

Next, a description will be given of a comparison of the amount of heat leakage from the room to the room when the room air is stirred during heating operation and when the room air is not stirred.
Fig. 4 shows the difference in the amount of heat leakage from the room to the outdoors when the room air is not stirred during heating operation (Figure 4 (a)) and when the room air is stirred (Figure 4 (b)). The figure to illustrate is shown.

In FIG. 4A, the room temperature ta indicates the temperature of warm air blown out from the indoor unit 7 staying near the ceiling due to heating. The warm air blown out from the indoor unit 7 stays near the ceiling because of its low density.
The room temperature tb indicates the temperature of air staying in the vicinity of the floor after warm air is blown out from the indoor unit 7 by heating. Air other than warm air stays near the floor due to gravity due to its high density.

The ground temperature tj in FIGS. 4 (a) and 4 (b) indicates the temperature of the ground that is less fluctuated compared to the air temperature throughout the year.
The temperature td indicates the outdoor temperature.
The room temperature te in FIG. 4 (b) is the room temperature when the air at room temperature ta and the air at room temperature tb in FIG. Show.

The volume a in FIG. 4A indicates the volume of air at room temperature ta, and the volume b indicates the volume of air at room temperature tb.
The volume a + b in FIG. 4B indicates the volume of air when the air at room temperature ta and the air at room temperature tb in FIG.
The thermal conductivity λ in FIGS. 4A and 4B indicates the thermal conductivity of the ceiling surface, wall surface, and floor surface. 4A and 4B, the thermal conductivity λ of each surface is the same value.
If the amount of heat exchange between indoor and outdoor in the case of FIG. 4 (a) is Q1, it can be expressed by equation (1), and if the amount of heat exchange between the indoor and outdoor in FIG. 4 (b) is Q2, it can be expressed by equation (2). I can express.

ここで、Ｍは、天井面、４つの壁面、床面の各面の面積を示している。なお、図４(ａ)、(ｂ)では、各面の１面の面積は同一の値Ｍとしている。

Here, M has shown the area of each surface of a ceiling surface, four wall surfaces, and a floor surface. 4A and 4B, the area of one surface of each surface is the same value M.

  In the case of FIG. 4 (a) (when indoor air is not agitated during heating operation), one item of the heat exchange amount Q1 in the equation (1) is a part of the ceiling surface and wall surface in contact with air at room temperature ta ( a / a + b) shows the amount of heat flowing out to the outside (temperature td), and two items are the heat from the part of the wall surface (b / a + b) in contact with the air at room temperature tb to the outside (temperature td) The three items show the amount of heat outflow from the floor surface in contact with air at room temperature tb to the ground surface (ground temperature tj).

  In the case of FIG. 4 (b) (when the room air is stirred during heating operation), one item of the heat exchange amount Q2 in the equation (2) is the outdoor (air temperature) from the ceiling surface and wall surface in contact with the air at room temperature te. The amount of heat flowing out to td) is shown, and the two items show the amount of heat flowing out from the floor surface in contact with air at room temperature te to the ground surface (ground temperature tj).

式(３)は、室温tａの空気と室温tｂの空気がそれぞれ容積aと容積bだけ室内に存在するときに、それらの室内空気を攪拌した場合に室温tｅが得られる関係を示している。

Equation (3) shows the relationship in which room temperature te is obtained when air at room temperature ta and air at room temperature tb exist in the room by volume a and volume b, respectively, when the room air is stirred.

Compared to the case where room temperature ta and room temperature tb are present only in volume a and volume b, respectively, the amount of heat flowing from the room to the outdoors is reduced when the room is stirred to obtain room temperature air. The case is shown below.

The condition that Q1 which is the heat outflow amount when the room air is not stirred (FIG. 4A) is larger than Q2 which is the heat outflow amount when the room air is stirred (FIG. 4B) is as follows. When solved, equation (5) is obtained. That is, when the volume a of warm air at room temperature ta staying near the ceiling is larger than the volume b of room air at room temperature tb sinking (staying) near the floor, heat flows out of the room to the outside by stirring. It is possible to reduce the amount (see equation (4)).
As shown in FIGS. 3B (comparative example) and (e) (embodiment), the louvers 12 and 13 are directed substantially downward, but the cross-flow fan 6 of the indoor unit 7 is stopped or rotated at a low rotational speed. Therefore, the warm air staying near the ceiling in the room cannot be provided near the floor, which is the living area of the user 14.

On the other hand, as shown in FIGS. 3C (comparative example) and (f) (embodiment), although the directions of the louvers 12 and 13 are different, the cross-flow fan 6 is operated at a high rotational speed in the indoor unit 7. It is possible to provide warm air staying near the ceiling near the floor.
However, in the case of FIGS. 3C (comparative example) and (f) (embodiment), the warm air near the ceiling is provided near the floor, which is the living area of the user 14, so that a sufficient amount is provided near the ceiling. Warm air needs to stay. That is, from the examination result of the heat outflow amount in FIG. 4, when the warm air near the ceiling is a small amount immediately after the operation (a <b, unlike Equation (5)), Equation (4), Equation (5 ), The amount of heat flowing out of the room to the outside increases when the room air is agitated compared to the case where the air is not agitated (unlike equation (4), Q1 <Q2).

  For this reason, providing warm air staying in the vicinity of the ceiling only by the difference between the set room temperature (set temperature) and the room temperature in the vicinity of the floor, which is the living area of the user 14, in this way, a sufficient amount of warm air in the vicinity of the ceiling. There is a risk that the room air is agitated before the stagnation occurs (when a <b in FIG. 4A). In this case, the amount of heat outflow (leakage) from the room to the outdoors increases. That is, unlike the equation (4), Q1 <Q2.

  On the other hand, not only the difference between the set room temperature (set temperature) and the room temperature, but also the difference between the room temperature and the set room temperature is not less than a predetermined value, and the room air is stirred when the state is maintained for a predetermined time, FIG. As shown in a> b of equation (5) in a), since the stirring is possible after the volume a of the room temperature ta becomes larger than the volume b of the room temperature tb, the amount of heat flow from the room to the outside is reduced. It becomes possible to do.

  That is, not only the difference between the set room temperature (set temperature) and the room temperature, but also the difference between the room temperature and the set room temperature is equal to or greater than a predetermined value and the state is maintained for a predetermined time. Since the relationship is> b, the heating load can be reduced by stirring the room air. Therefore, it becomes possible to reduce the power consumption at the time of heating.

<Control during heating operation of comparative example (conventional)>
Next, control during the heating operation of the comparative example (conventional) will be described with reference to FIGS. 5 and 6.
FIG. 5 shows a control flow during the heating operation of the comparative example (conventional), and FIGS. 6A, 6B, 6C, and 6D show the (elapsed) time during the heating operation of the comparative example, respectively. The change in the room temperature T1, the rotational speed of the cross-flow fan 6, the direction of the louvers 12 and 13, and the rotational speed of the compressor 2 are shown.

First, the user sets a heating operation with the remote controller r and transmits an operation command signal to the indoor unit 7 (S (step) 1). Further, the set room temperature T2, the wind speed, and the wind direction are set with the remote controller r, and an operation command signal is transmitted to the indoor unit 7 (S2).
The control unit of the indoor unit 7 receives a heating operation command, the compressor 2 of the indoor unit 7 starts rotating (time t0 in FIG. 6D), and the cross-flow fan 6 also starts rotating (FIG. 6B). ) At time t0). The louvers 12 and 13 are substantially in the horizontal direction (substantially horizontal) until the temperature of the refrigerant pipe 4 rises to a predetermined temperature (refrigerant pipe temperature Tr at which heating starts) or higher (until time t1 in FIG. 6C). The warm air is sent in a substantially horizontal direction (substantially horizontal direction) (S3).

  When the temperature of the refrigerant pipe 4 rises to a predetermined temperature (refrigerant pipe temperature Tr at which heating starts) or higher (S4) and the room temperature T1 is lower than the set room temperature T2 (Yes in S5), the louver 12 of the indoor unit 7; 13 is substantially downward (substantially downward) (after time t1 in FIG. 6 (c)), and the compressor 2 rotates at a high rotation speed N1 so that warm air reaches the feet of the user's 14 living area. Is performed (S6). That is, as shown in FIG. 6A, air conditioning is performed so that the room temperature T1 becomes higher than the set room temperature T2.

  Further, when the difference between the room temperature T1 and the set room temperature T2 is equal to or greater than a predetermined value T01 (after time t3 in FIG. 6A) (Yes in S7), the louvers 12 and 13 are substantially downward (substantially downward). (See FIG. 6C), the rotation of the compressor 2 is stopped or slow (after time t3 in FIG. 6D) (S8). This state is continued until the difference between the set room temperature T2 and the room temperature T1 becomes equal to or greater than a predetermined value T0 (No in S9).

On the other hand, when the temperature of the refrigerant pipe 4 rises to a predetermined temperature Tr or higher in S4 and the room temperature T1 is higher than the set room temperature T2 (No in S5), the process proceeds to S7.
To summarize the control during the heating operation of the comparative example (conventional), as shown in FIG. 6 (a), the room temperature T1 becomes a set room temperature T2 plus a predetermined value T01 (time t3 in FIG. 6 (a)). In S6, the compressor 2 is operated at a high rotational speed N1, and the cross-flow fan 6 is also operated at a high rotational speed.

  When the room temperature T1 is smaller than the set room temperature T2 minus T0 and the room temperature T1 becomes equal to or less than the set room temperature T2, the compressor 2 and the cross-flow fan 6 are operated at the maximum rotational speed in S6 (time t4 in FIG. 6A). To t5). Thereafter, as shown in FIG. 6A, the room temperature T1 is operated similarly between the set room temperature T2 plus a predetermined value T01 (time t5) and the set room temperature T2 minus T0.

<Control during heating operation> (first embodiment)
Next, control during heating operation of the indoor unit 7 of the embodiment will be described with reference to FIGS. 7 and 8.
FIG. 7 shows a control flow during the heating operation of the embodiment, and FIGS. 8A, 8B, 8C, and 8D show the room temperature T1 with respect to the (elapsed) time during the heating operation of the embodiment, respectively. , The rotational speed of the once-through fan 6, the direction of the louvers 12 and 13, and the rotational speed of the compressor 2.

First, the user sets the heating operation by using the remote controller r, and transmits an operation command signal to the indoor unit 7 (S (step) 110). In addition, the user sets (selects) the set room temperature T2, the wind speed, and the wind direction with the remote controller r, and transmits an operation command signal to the indoor unit 7 (S111).
The control unit of the indoor unit 7 receives a heating operation command from the remote controller r, the compressor 2 starts rotating (time t0 in FIG. 8D), and the cross-flow fan 6 of the indoor unit 7 also starts rotating ( Time t0 in FIG. The louvers 12 and 13 are positioned in a substantially horizontal direction (substantially horizontal direction) until the temperature of the refrigerant pipe 4 rises to a predetermined temperature (refrigerant pipe temperature Tr at which heating starts) (S113) (in FIG. 8C). (Until time t1), warm air is sent in a substantially horizontal direction (substantially horizontal direction) (S112).

  When the temperature of the refrigerant pipe 4 rises to a predetermined temperature (refrigerant pipe temperature Tr at the start of heating) (after time t1 in FIG. 8C) (S113), and the room temperature T1 is a temperature below the set room temperature T2 (FIG. 8 (time t1 to t2) (Yes in S114), the louvers 12 and 13 of the indoor unit 7 face substantially downward, blown out blown air substantially downward, the compressor 2 rotates at a high rotational speed N1, and the user Air conditioning is performed so that warm air reaches around 14 feet (S115).

  Here, during the heating operation in S115, the substantially downward direction in which the louvers 12 and 13 of the indoor unit 7 are directed substantially downward and the blown air is blown substantially downward means the following angle. That is, in the heating, considering that the warm air rises due to buoyancy, it is fundamental to blow out the wind direction toward the floor. Therefore, the substantially downward direction during heating operation refers to an angle in the range of 0 to 25.5 ° upward from the vertical direction. For example, the louver 12 of the upper vertical wind direction plate is 25.5 ° upward from the vertical, and the louver 13 of the lower vertical wind direction plate is 17.2 ° upward from the vertical.

On the other hand, when the temperature of the refrigerant pipe 4 rises to a predetermined temperature or higher in S114 and the room temperature T1 is higher than the set room temperature T2 (No in S114), the process proceeds to S116.
Then, the difference between the set room temperature T2 and the room temperature T1 becomes equal to or greater than a predetermined value T3 (time t3 in FIG. 8A) (Yes in S116), and this state is determined for a predetermined time ts (for example, 5 minutes) (FIG. 8 ( When a) times t3 to t4) are maintained (Yes in S117), the louvers 12 and 13 of the indoor unit 7 face upward from substantially downward (substantially downward) (after time t4 in FIG. 8C). The compressor 2 stops or rotates at a low speed (S118).

If the difference between the room temperature T1 and the set room temperature T2 is equal to or greater than a predetermined value T01 (see FIG. 8A) (Yes in S119), the process proceeds to S118.
On the other hand, when the difference between the room temperature T1 and the set room temperature T2 is smaller than the predetermined value T01 (see FIG. 8A) (No in S119), the difference between the set room temperature T2 and the room temperature T1 is equal to or greater than the predetermined value T0. (See FIG. 8A) is determined (S120).

If the difference between the set room temperature T2 and the room temperature T1 is equal to or greater than the predetermined value T0 (Yes in S120), the process proceeds to S115 because the room temperature T1 has dropped from the set room temperature T2 by the predetermined value T0 or more.
On the other hand, when the difference between the set room temperature T2 and the room temperature T1 is less than the predetermined value T0 (No in S120), the process proceeds to S118.
The above is the control flow during the heating operation shown in FIG. When the user operates the remote controller r to stop the operation, the control of the heating operation in FIG. 7 is stopped at that time.

  According to the heating operation described above, the difference between the set room temperature T2 and the room temperature T1 is equal to or greater than a predetermined value T3 (Yes in S116), and the state is maintained for a predetermined time ts (Yes in S117), thereby near the ceiling. It is possible to ensure a sufficient amount of warm air. Therefore, warm air in the vicinity of the ceiling is blown out from the substantially downward direction (substantially downward) by the louvers 12 and 13 and the indoor air is stirred to provide warm air near the floor that is the living area of the user 14. Is possible.

  Further, the difference between the room temperature T1 and the set room temperature T2 is equal to or greater than a predetermined value T3, and by maintaining this state for a predetermined time ts, a sufficient amount of warm air can be secured near the ceiling (FIG. 4). In (a), a> b), it becomes possible to reduce the amount of heat flow from the room to the outside by stirring the room air (see equations (4) and (5)). As described above, the amount of heat flowing out of the room to the outside is reduced, so that the heating load can be kept low, and the amount of power consumed by heating can be reduced.

Furthermore, when the warm air staying in the vicinity of the ceiling is provided near the floor, the air is blown upward from substantially downward (substantially downward), so that air is not blown directly to the feet of the user's 14 living area. Warm air can be supplied without causing discomfort due to cold.
Moreover, as shown in FIG.8 (d), it becomes possible to reduce power consumption by reducing the rotation speed of the compressor 2 at the time of heating operation.

7 and 8 show that T3 takes a positive value, T3 may be negative or zero. Hereinafter, a case where T3 is a positive value, a case where T3 is a negative value, and a case where T3 is a zero value will be exemplified.
When T3 is positive and the predetermined value T3 is set to + 3 ° C. in S116, the room temperature T1 is 5 ° C. in S115 when the room temperature T1 = 5 ° C. and the set room temperature T2 = 22 ° C. in S (step) 114. From S116, the difference between the room temperature T1 = 25 ° C. and the set room temperature T2 = 22 ° C. becomes equal to the predetermined value T3 = 3 ° C., and the process proceeds to S117.

When T3 is zero and the predetermined value T3 is set to 0 ° C. in S116, the room temperature T1 is 5 ° C. in S115 when the room temperature T1 = 5 ° C. and the set room temperature T2 = 22 ° C. in S (step) 114. In step S116, 0 ° C. of the difference between the room temperature T1 = 22 ° C. and the set room temperature T2 = 22 ° C. becomes equal to a predetermined value T3 = 0 ° C., and the process proceeds to S117.
If T3 is negative and the predetermined value T3 is set to −2 ° C. in S116, the room temperature T1 is 5 in S115 when the room temperature T1 = 5 ° C. and the set room temperature T2 = 22 ° C. in S (step) 114. In S116, -2 ° C, which is the difference between the room temperature T1 = 20 ° C and the set room temperature T2 = 22 ° C, becomes equal to the predetermined value T3 = -2 ° C, and the process proceeds to S117.

Next, the optimum angle and the allowable angle of the upward direction of the louvers 12 and 13 of the indoor unit 7 in S118 of FIG. 7 from the substantially downward direction (substantially downward) will be described.
The optimum angle of the louvers 12 and 13 in S118 is downward with respect to the horizontal direction, which is the angle at which the wind is not blown directly even in the innermost floor of a 20 tatami room that is the maximum heatable area. 12.5 °.
This optimum angle does not blow wind directly on the floor, so even in a 20 tatami room, the feet are not cooled directly, and the feet are not felt by the blown air that is not heat-exchanged.

The allowable angle of the louvers 12 and 13 in S118 is 0 to the downward direction on the basis of the horizontal direction, which is the angle in which the wind is not directly blown to the innermost floor of the 6 tatami room which is the smallest heatable area. The angle is in the range of 36.5 °.
If it blows at an angle larger than 36.5 °, the wind will not be blown at the foot in a 6 tatami room, but in a room with a depth of 2.7 m or more, the wind is directly at the foot at a position farther than 2.7 m. There is a possibility that you will feel cold in your feet.
On the other hand, when the air is blown upward at an angle smaller than 0 °, that is, the warm air staying near the ceiling is blown into the warm air as it is, the warm air cannot be sent to the user's living area.

  As described above, the air conditioner C includes the room temperature measuring means (room temperature sensor 11) for measuring the room temperature in the room, the louvers 12 and 13 for changing the blowing direction of the blown air, and the setting input means for inputting the operation setting. (Remote controller r), and the compressor 2 is an air conditioner that blows out blown air substantially downward (substantially downward) during heating operation at the rotational speed N1 (first rotational speed). The difference between the room temperature T1 measured by the room temperature measuring means (room temperature sensor 11) and the set room temperature (set temperature) T2 set by the setting input means (remote controller r) is equal to or greater than a predetermined value T3, and this state is maintained for a predetermined time ts. When maintained, a control unit is provided which blows out from the lower direction (substantially downward) upward by the louvers 12 and 13 at the number of rotations of the compressor 2 smaller than N1 (first rotation number).

<Reduction of Rotational Speed of Cross-Flow Fan 6 during Heating Operation> (Second Embodiment)
As shown in FIG. 8B, in the air conditioner C, during the heating operation, the difference between the set room temperature T2 and the room temperature T1 becomes larger than a predetermined value T3 (after time t3), and the state is changed to a predetermined time ts. Only when it is maintained (time t3 to t4), the rotational speed of the compressor 2 is reduced (see FIG. 8D) and the rotational speed of the cross-flow fan 6 is reduced.
By reducing the rotational speed of the cross-flow fan 6 in addition to the rotational speed of the compressor 2 from the rotational speed n1, it is possible to reduce the power consumption more than when reducing only the rotational speed of the compressor 2. .

  In this way, the air conditioner C includes a room temperature measuring means (room temperature sensor 11) for measuring the room temperature in the room, louvers 12 and 13 for changing the blowing direction of the blown air, and setting input means for inputting operation settings ( Remote control r) and a once-through fan 6 for blowing out air, and the once-through fan 6 is operated at the rotation speed n1 (third rotation speed) during heating operation at the rotation speed N1 (second rotation speed) of the compressor 2. An air conditioner that blows out the blown air substantially downward (substantially downward), and at the time of heating operation, the room temperature T1 measured by the room temperature measuring means (room temperature sensor 11) and the set room temperature set by the setting input means (remote controller r) When the difference from (set temperature) T2 is equal to or greater than a predetermined value T3 and this state is maintained for a predetermined time ts, the compressor 2 is operated at a rotational speed less than N1 (second rotational speed) and the cross-flow fan 6 At a speed lower than n1 (third speed) It is characterized in that a control unit for blowing upward from the substantially downward direction (substantially downward) in bar 12, 13.

<Control during cooling operation of comparative example (conventional)>
Next, the control during the cooling operation of the comparative example (conventional) will be described with reference to FIGS.
FIG. 9 shows a control flow during the cooling operation of the comparative example (conventional), and FIGS. 10 (a), (b), (c), and (d) respectively show the control flow during the cooling operation of the comparative example (conventional). Elapsed time) The change in room temperature T1 with respect to time, the rotational speed of the cross-flow fan 6, the direction of the louvers 12 and 13, and the rotational speed of the compressor 2 are shown.

First, the user sets a cooling operation by using the remote controller r, and transmits an operation command signal to the indoor unit 7 (S (step) 21). Further, the set room temperature T5, the wind speed, and the wind direction are set with the remote controller, and an operation command signal is transmitted to the indoor unit 7 (S22).
The control unit of the indoor unit 7 receives a cooling operation command, the compressor 2 of the indoor unit 7 starts rotating (time t0 in FIG. 10D), and the cross-flow fan 6 also starts rotating (FIG. 10B). ) At time t0). When the difference between the set room temperature T5 and room temperature T4 is smaller than the predetermined value T02 (time t0 to t1 in FIG. 10) (No in S26), the louvers 12 and 13 of the indoor unit 7 face in a substantially horizontal direction (substantially horizontal direction). The compressor 2 rotates at a high rotation speed N2, and air conditioning is performed so that the cool air reaches near the feet of the user 14 (S23 to S25).

  On the other hand, when the difference between the set room temperature T5 and the room temperature T4 is equal to or greater than a predetermined value T02 (after time t1 in FIG. 10A (Yes in S26)), the louvers 12 and 13 are positioned in a substantially horizontal direction. The rotation is stopped or slow (low rotation) (S27) This state is continued while the difference between the set room temperature T5 and the room temperature T4 is less than a predetermined value T0 (S27, S28), and the room temperature T4 is set. When the difference from the room temperature T5 becomes equal to or greater than the predetermined value T0 (time t2 in FIG. 10A) (Yes in S28), the process proceeds to S24, S24 to S28 are repeated, and the control after time t2 in FIG. Is done.

<Control during cooling operation> (Third embodiment)
Next, control during the cooling operation of the indoor unit 7 of the embodiment will be described with reference to FIGS. 11 and 12.
FIG. 11 shows a control flow during the cooling operation of the embodiment, and FIGS. 12A, 12B, 12C, and 12D show the room temperature T1 with respect to the (elapsed) time during the cooling operation of the embodiment, respectively. , The rotational speed of the once-through fan 6, the direction of the louvers 12 and 13, and the rotational speed of the compressor 2.
First, the user sets the cooling operation by using the remote controller r and transmits an operation command signal to the indoor unit 7 (S (step) 201). In addition, the user sets the set room temperature T5, the wind speed, and the wind direction with the remote controller r, and transmits an operation command signal to the indoor unit 7 (S202).

The control unit of the indoor unit 7 receives a cooling operation command from the remote controller r, the compressor 2 starts rotating (time t0 in FIG. 12D), and the cross-flow fan 6 of the indoor unit 7 also starts rotating ( Time t0 in FIG.
When the difference between the set room temperature T5 and the room temperature T4 is smaller than the predetermined value T6 (No in S206), the louvers 12 and 13 of the indoor unit 7 are positioned in a substantially horizontal direction (substantially horizontal direction) and blow out air in a substantially horizontal direction. The compressor 2 rotates at a high rotation speed N2 (S205). This state is continued until the difference between the set room temperature T5 and the room temperature T4 is equal to or greater than a predetermined difference T6 (S203 to S205).

  During the cooling operation of S205, the louvers 12 and 13 of the indoor unit 7 are positioned in a substantially horizontal direction (substantially horizontal direction), and the substantially horizontal direction in which the blown air is blown out in a substantially horizontal direction means the following angle. In other words, the cooling is blown out along the ceiling, so that the cool air can be sent far away, so that the air blowout in the horizontal direction is fundamental. Therefore, the substantially horizontal direction during the cooling operation refers to an angle in a range of 0 ° to 22.8 ° from the horizontal to the downward direction. For example, the louver 12 of the upper vertical wind direction plate is 0.45 ° downward from the horizontal, and the louver 13 of the lower vertical wind direction plate is 22.8 ° downward from the horizontal.

  The difference between the set room temperature T5 and the room temperature T4 is equal to or greater than a predetermined value T6 (after time t1 in FIG. 12A) (Yes in S206), the louvers 12 and 13 are directed substantially horizontally, and the compressor 2 has a high rotational speed N2. And the state is maintained for a predetermined time tc (for example, 5 minutes) (see FIG. 12D) (time t1 to t2 in FIG. 12) (Yes in S207), the louvers 12 and 13 are substantially horizontal. The compressor 2 stops or rotates at a low speed (S208).

If the difference between the set room temperature T5 and the room temperature T4 is equal to or greater than a predetermined value T02 (see FIG. 12A) (Yes in S209), the process proceeds to S208.
On the other hand, when the difference between the set room temperature T5 and the room temperature T4 is smaller than the predetermined value T02 (see FIG. 12A) (No in S209), the difference between the room temperature T4 and the set room temperature T5 is greater than or equal to the predetermined value T0. (See FIG. 12A) is determined (S210).

  When the difference between the room temperature T4 and the set room temperature T5 is equal to or greater than the predetermined value T0 (Yes in S210), the process proceeds to S205, where the louvers 12 and 13 of the indoor unit 7 are positioned in a substantially horizontal direction (substantially horizontal direction) and compressed. Machine 2 rotates at a high speed N2.

On the other hand, if the difference between the room temperature T4 and the set room temperature T5 is less than the predetermined value T0 (No in S210), the process proceeds to S208, where the louvers 12 and 13 are compressed downward from the substantially horizontal direction (substantially horizontal direction). The machine 2 is set to stop or low rotation.
The above is the control flow during the cooling operation shown in FIG. When the user operates the remote controller r to stop the operation, the cooling operation control in FIG. 11 is stopped at that time.

  According to the above-described cooling operation, the difference between the set room temperature T5 and the room temperature T4 is equal to or greater than the predetermined value T6 (Yes in S206), and the state is maintained for a predetermined time tc (Yes in S207). It is possible to secure a sufficient amount of cold air (a> b in FIG. 4A), and the louvers 12 and 13 stir the air in the blowout chamber from the substantially horizontal direction (substantially horizontal direction) downward. By doing so, it becomes possible to reduce the amount of heat flowing from the outside into the room (see equations (4) and (5)).

In this manner, the amount of heat flowing from the room to the outdoors is reduced, so that the room temperature can be kept low, and the amount of power consumed by cooling can be reduced.
Furthermore, when the cold air staying in the vicinity of the floor is stirred by the louvers 12 and 13, it is blown out from the substantially horizontal direction (substantially horizontal direction) to the bottom of the user's 14 living area. It is possible to provide an improved feeling of comfort due to airflow.

Here, the optimum angle and the allowable angle of the louvers 12 and 13 of the indoor unit 7 in S208 of FIG. 11 that are downward from the substantially horizontal direction (substantially horizontal direction) will be described.
The optimum angle of the louvers 12 and 13 in S208 is the downward direction with respect to the horizontal direction, which is the angle at which the wind can be blown directly even in the innermost floor of a 6 tatami room, which is the smallest space that can be cooled. 36.5 °.
By spraying directly on the floor at the optimum angle, not only the air in the room is agitated, but also the user's feet can feel the coolness due to the feeling of airflow.

The allowable angle of the louvers 12 and 13 in S208 is based on the horizontal direction, which is the angle at which the wind can be blown directly, even on the farthest floor of a 30 tatami room, which is the maximum cooling capacity. An angle in the range of 8.4 ° to 90 ° in the direction.
If it blows off at an angle of less than 8.4 °, it cannot blow out to the user's feet in a room with a depth of 13.5 m or less, and coolness due to the airflow may be reduced.
On the other hand, when the air is blown toward an angle larger than 90.0 °, that is, toward a wall installed perpendicularly, the coolness due to the airflow of the user can be reduced in the same manner as when the air is blown at an angle smaller than 8.4 °. There is sex.

Moreover, as shown in FIG.12 (d), it becomes possible to reduce power consumption by reducing the rotation speed of the compressor 2 at the time of air_conditionaing | cooling operation.
11 and 12, T6 is shown to be a positive value, but T6 may be negative or zero.

  In this way, the air conditioner C includes a room temperature measuring means (room temperature sensor 11) for measuring the room temperature in the room, louvers 12 and 13 for changing the blowing direction of the blown air, and setting input means for inputting operation settings ( An air conditioner that blows out blown air in a substantially horizontal direction (substantially horizontal direction) during cooling operation at the rotation speed N2 (fourth rotation speed) of the compressor 2, The difference between the room temperature T4 measured by the room temperature measuring means (room temperature sensor 11) and the set room temperature (set temperature) T5 set by the setting input means (remote controller r) is equal to or greater than a predetermined value T6, and this state is maintained for a predetermined time. When tc (see FIG. 12) is maintained, a control unit is provided which blows downward from the substantially horizontal direction (substantially horizontal direction) at the number of rotations of the compressor 2 smaller than N2 (fourth rotation number).

<Reduction of Rotational Speed of Cross-Flow Fan 6 during Cooling Operation> (Fourth Embodiment)
As shown in FIG. 12B, the air conditioner C has a difference between the set room temperature T5 and the room temperature T4 larger than a predetermined value T6 during the cooling operation, and maintains this state for a predetermined time tc. The rotational speed of the compressor 2 is reduced from the rotational speed N2, and the rotational speed of the cross-flow fan 6 is reduced from the rotational speed n2.

  By reducing the rotational speed of the cross-flow fan 6 from the rotational speed n2 in addition to the rotational speed of the compressor 2, the power consumption can be reduced more than when only the rotational speed of the compressor 2 is reduced from the rotational speed N2. It becomes possible.

  As described above, the air conditioner C includes the room temperature measuring means (room temperature sensor 11) for measuring the room temperature in the room, the louvers 12 and 13 for changing the blowing direction of the blown air, and the setting input means for inputting the operation setting. (Remote controller r) and a once-through fan 6 that blows out air, and when the cooling operation of the compressor 2 is performed at the rotation speed N2 (fifth rotation speed), the once-through fan 6 is at the rotation speed n2 (sixth rotation speed) An air conditioner that blows out blown air in a substantially horizontal direction (substantially horizontal direction), and is set at room temperature T4 measured by a room temperature measurement means (room temperature sensor 11) and setting input means (remote control r) during cooling operation. When the difference from room temperature (set temperature) T5 is greater than or equal to a predetermined value T6 and this state is maintained for a predetermined time tc (see FIG. 12), the compressor 2 is operated at a rotational speed less than N2 (fifth rotational speed). In addition, the cross-flow fan 6 is rotated less than n2 (sixth rotation speed). A control unit is provided which operates at a rotational speed (after time t2 in FIG. 12) and blows downward from the substantially horizontal direction (substantially horizontal direction) by the louvers 12 and 13.

As above, this embodiment is summarized,
The air conditioner according to the first embodiment includes room temperature measuring means for measuring room temperature in the room, blowing direction changing means for changing the blowing direction of the blowing air, and setting input means for inputting operation settings. The air conditioner that blows out the blown air substantially downward when the compressor is in the heating operation at the rotation speed N1 (first rotation speed), and the room temperature (T1) measured by the room temperature measuring means during the heating operation When the difference from the set temperature (T2) input to the setting input means exceeds a predetermined value (T3), and the state is maintained for a predetermined time (ts), the compressor starts from N1 (first rotation speed). A control unit is provided which is operated at a small number of rotations and controls the blowing air to be blown upward from the substantially downward direction by the blowing direction changing means.

  According to the first embodiment, it is possible to reduce the amount of power consumption by reducing the rotation speed of the compressor during the heating operation.

  The air conditioner of the second embodiment includes room temperature measuring means for measuring the room temperature in the room, blowing direction changing means for changing the blowing direction of the blowing air, setting input means for inputting operation settings, and air A once-through fan that blows out, and when the compressor is in heating operation at the rotation speed N1 (second rotation speed), the once-through fan is operated at the rotation speed n1 (third rotation speed). This is an air conditioner that blows in the direction, and during heating operation, the difference between the room temperature (T1) measured by the room temperature measurement means and the set temperature (T2) input to the setting input means is greater than or equal to a predetermined value (T3) When the state is maintained for a predetermined time (ts), the compressor is operated at a speed lower than N1 (second speed) and the cross-flow fan is operated at a speed lower than n1 (third speed). Driven and blown out by blowing direction changing means However, a control unit may be provided that controls the air to be blown upward from the substantially downward direction.

  According to the second embodiment, it is possible to further reduce power consumption by reducing the rotation speed of the compressor and the rotation speed of the cross-flow fan during heating operation.

  According to the first and second embodiments, in the heating operation, not only the difference between the set temperature and the room temperature but also the time during which the difference between the set room temperature and the room temperature is maintained within the predetermined range, It is possible to ensure a sufficient amount of warm air in the vicinity of the ceiling to reduce the temperature distribution.

  In addition, according to the first and second embodiments, it is possible to reduce the amount of heat leaked from the room to the outdoors by reducing the temperature distribution in the indoor vertical direction during the heating operation, thereby reducing the power consumption. It becomes possible to reduce.

  Further, according to the first and second embodiments, during the heating operation, the cold air blown out to the user's feet by positioning the blown air upward from the substantially downward direction (substantially downward) and stirring the room air. It is possible to supply warm air staying in the vicinity of the ceiling to the user living near the floor without making the user feel, and to improve the user's comfort.

  The air conditioner of the third embodiment includes a room temperature measuring means for measuring the room temperature in the room, a blowing direction changing means for changing the blowing direction of the blowing air, and a setting input means for inputting operation settings. When the compressor is in cooling operation at the rotation speed N2 (fourth rotation speed), it is an air conditioner that blows out blown air in a substantially horizontal direction, and during the cooling operation, the set temperature (T5) input to the setting input means When the difference from the room temperature (T4) measured by the room temperature measuring means is a predetermined value (T6) or more and the state is maintained for a predetermined time (tc), the compressor is less than the N2 (fourth rotation speed). There may be provided a control unit that is operated at a rotational speed and controls the blowing air to be blown downward from the substantially horizontal direction by the blowing direction changing means.

  According to the third embodiment, it is possible to propose the amount of power consumption by reducing the rotation speed of the compressor during the cooling operation.

  The air conditioner of the fourth embodiment includes a room temperature measuring means for measuring the room temperature in the room, a blowing direction changing means for changing the blowing direction of the blowing air, a setting input means for inputting operation settings, and air. A cross-flow fan that blows out, and when the compressor is in cooling operation at the rotation speed N2 (fifth rotation speed), the cross-flow fan is operated at the rotation speed n2 (sixth rotation speed), and the blown air is substantially horizontal by the blowing direction changing means. This is an air conditioner that blows in the direction, and during cooling operation, the difference between the set temperature (T5) input to the setting input means and the room temperature (T4) measured by the room temperature measuring means becomes a predetermined value (T6) or more. When the state is maintained for a predetermined time (tc), the compressor is operated at a rotational speed less than N2 (fifth rotational speed) and the cross-flow fan is operated at a rotational speed less than n2 (sixth rotational speed). Driven and blown by blowing direction changing means You may provide the control part which controls so that discharge air may be blown out below the said substantially horizontal direction.

  According to the fourth embodiment, it is possible to further reduce power consumption by reducing the rotational speed of the compressor and the rotational speed of the cross-flow fan during cooling operation.

  According to the third and fourth embodiments, during the cooling operation, the blown air is positioned below the substantially horizontal direction (substantially horizontal direction) and the air flow is supplied to the user, so that heat radiation from the human body is promoted by the air flow. Thus, it is possible to improve the user's comfort.

  Further, according to the third and fourth embodiments, during the cooling operation, not only the difference between the set temperature and the room temperature but also the time during which the difference between the set room temperature and the room temperature is maintained within a predetermined range can be substantially reduced. When the air is blown downward from the horizontal direction (substantially horizontal), it is possible to supply a sufficient amount of cold air to the room to improve the user's comfort.

  Further, according to the third and fourth embodiments, it is possible to reduce the amount of heat leaked from the room to the outside by reducing the temperature distribution in the vertical direction of the room during the cooling operation, thereby reducing the power consumption. It becomes possible to reduce.

  In addition, the substantially horizontal direction described in the claims “Blowing out blown air in a substantially horizontal direction during cooling operation” means the following angle. In other words, the cooling is blown out along the ceiling, so that the cool air can be sent far away, so that the air blowout in the horizontal direction is fundamental. Therefore, the substantially horizontal direction during the cooling operation refers to an angle in a range of 0 ° to 22.8 ° from the horizontal to the downward direction.

  In addition, the substantially downward direction described in the claims “Blowing out blown air substantially downward during heating operation” means the following angle. That is, in the heating, considering that the warm air rises due to buoyancy, it is fundamental to blow out the wind direction toward the floor. Therefore, the substantially downward direction during heating operation refers to an angle in the range of 0 to 25.5 ° upward from the vertical direction.

2 Compressor 6 Cross-flow fan 7 Indoor unit (air conditioner)
11 Room temperature sensor (room temperature measuring means)
12, 13 Louver (Blowing direction changing means)
C Air conditioner
N1 speed
N2 speed
n1 Rotation speed
n2 Speed r Remote control (setting input means)
T1 room temperature
T2 set room temperature (set temperature)
T3 Predetermined value
T4 room temperature
T5 Set room temperature (set temperature)
T6 Predetermined value
tc Predetermined time
ts predetermined time

Claims (8)

Room temperature measuring means for measuring room temperature in the room;
A blowing direction changing means for changing a blowing direction of the blowing air;
A setting input means for inputting operation settings;
During the heating operation at the rotation speed N1, the compressor is an air conditioner that blows out the blown air substantially downward,
During heating operation, when the difference between the room temperature measured by the room temperature measuring unit and the set temperature input to the setting input unit is a predetermined value or more, and the state is maintained for a predetermined time,
An air conditioner characterized in that the compressor is operated at a rotational speed less than N1, and a control unit is provided for controlling the blowing air to be blown upward from the substantially downward direction by the blowing direction changing means. . Room temperature measuring means for measuring room temperature in the room;
A blowing direction changing means for changing a blowing direction of the blowing air;
A setting input means for inputting operation settings;
With a once-through fan that blows out air,
When the compressor is heated at a rotation speed of N1, the cross-flow fan is operated at a rotation speed of n1, and is an air conditioner that blows out the blown air substantially downward by the blowing direction changing means,
During heating operation, when the difference between the room temperature measured by the room temperature measuring unit and the set temperature input to the setting input unit is a predetermined value or more, and the state is maintained for a predetermined time,
The compressor is operated at a rotational speed less than the N1, the cross-flow fan is operated at a rotational speed less than the n1, and the blown air is blown upward from the substantially downward direction by the blowing direction changing means. An air conditioner comprising a control unit for controlling. 3. The air conditioner according to claim 1, wherein the upward direction from the substantially downward direction is 12.5 ° downward with respect to a horizontal direction. 3. The air conditioner according to claim 1, wherein the upward direction from the substantially downward direction is within a range of 0 to 36.5 ° in a downward direction with respect to a horizontal direction. Room temperature measuring means for measuring room temperature in the room;
A blowing direction changing means for changing a blowing direction of the blowing air;
A setting input means for inputting operation settings;
During the cooling operation at a rotational speed of N2, the compressor is an air conditioner that blows out the blown air in a substantially horizontal direction,
At the time of cooling operation, when the difference between the set temperature input to the setting input means and the room temperature measured by the room temperature measuring means is a predetermined value or more and the state is maintained for a predetermined time,
An air conditioner characterized in that the compressor is operated at a rotational speed lower than N2, and a control unit is provided for controlling the blown-out air to be blown downward from the substantially horizontal direction by the blow-out direction changing means. . Room temperature measuring means for measuring room temperature in the room;
A blowing direction changing means for changing a blowing direction of the blowing air;
A setting input means for inputting operation settings;
With a once-through fan that blows out air,
When the compressor is in cooling operation at a rotational speed of N2, the cross-flow fan is operated at a rotational speed of n2, and is an air conditioner that blows out the blown air in a substantially horizontal direction by the blowing direction changing means,
At the time of cooling operation, when the difference between the set temperature input to the setting input means and the room temperature measured by the room temperature measuring means is a predetermined value or more and the state is maintained for a predetermined time,
The compressor is operated at a rotational speed less than the N2 and the cross-flow fan is operated at a rotational speed less than the n2 so that the blown air is blown downward from the substantially horizontal direction by the blowing direction changing means. An air conditioner comprising a control unit for controlling. The air conditioner according to claim 5 or 6, wherein the downward direction from the substantially horizontal direction is within a range of 36.5 ° in a downward direction with respect to the horizontal direction. The air conditioner according to claim 5 or 6, wherein the downward direction from the substantially horizontal direction is within a range of 8.4 ° to 90 ° in the downward direction with respect to the horizontal direction.

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