JP2007040554A - Air conditioner - Google Patents

Abstract

[PROBLEMS] To control indoor fans when heating thermo-off, not only the intake air temperature, but also the function to select the operation of the indoor fan including the stop by combining with the indoor heat exchanger temperature or remote control set temperature, etc. An air conditioner that reduces the unpleasant feeling given to the user due to the feeling of cold air.
An indoor fan control means (11) for operating or stopping the indoor fan (4) at a light wind speed (LL) set to be equal to or lower than the minimum rotational speed (L) of the indoor fan (4) to be used normally, and an indoor heat exchanger temperature (T6) and a remote controller is provided. The temperature difference DT1 with respect to the set temperature T9 is selected as an input, and as long as the remaining heat of the indoor heat exchanger 6 remains, the fan operation is performed to contribute to the heating capacity and circulate, and the remaining heat is eliminated. As soon as the indoor fan 4 is stopped, the feeling of cold air in the state where the indoor heat exchanger temperature T6 is lowered can be prevented.
[Selection] Figure 1

Description

  The present invention relates to an air conditioner that performs various settings using a remote controller in a heating operation mode.

  Conventionally, in this type of air conditioner heating thermo-off indoor fan control method, the room temperature at the time of thermo-off is detected, the indoor fan is set to a high rotation speed when the room temperature is high, and the thermo-off is set to a low rotation speed when the room temperature is low There is one that controls indoor fan operation at the time (see, for example, Patent Document 1).

The flowchart in FIG. 6 shows the indoor fan control when the heating thermostat of the conventional air conditioner described in Patent Document 1 is turned off. As shown in FIG. 6, first, in step ST1, it is determined whether the compressor is on or not, and if not on, the compressor is kept off in ST2 and the indoor fan is set to ultra-fine wind. If ST1 is on, the compressor is turned on ST3. In ST4, the thermo-off determination is made. If the thermo-off condition is satisfied, the room temperature is detected in ST5, the indoor fan rotation speed corresponding to the room temperature is set according to the table in ST6, and the indoor fan rotation speed operation is performed in ST7. Thereafter, monitoring is performed by the thermo-on determination in ST8, and if the thermo-on condition is satisfied, the process returns to ST3.
JP 2001-280675 A

  However, in the conventional configuration, since the room temperature based on the intake air temperature is used as a control input for calculating the indoor fan rotation speed when the heating thermo-off is performed, instability factors such as the thermal effect of the short circuit or the indoor heat exchanger temperature are eliminated. Contains. Although the set number of rotations is subdivided according to the room temperature, there is no stop, so that depending on the situation, there is a problem that the air blows directly and gives the user unpleasant feeling.

  The present invention solves the above-mentioned conventional problems, and controls indoor fans when the heating thermo is off, including not only the intake air temperature but also the combination of the indoor heat exchanger temperature and the remote control set temperature, etc. An object of the present invention is to provide an air conditioner that has a function of selecting the operation and reduces the discomfort given to the user by the feeling of cool air blown.

  In order to solve the above-mentioned conventional problems, the air conditioner of the present invention operates the indoor fan at a rotation speed set to be equal to or lower than the minimum rotation speed of the indoor fan normally used for indoor fan control at the time of heating thermo-off, or An indoor fan control means for stopping is provided, and any one of the temperature differences between the indoor heat exchanger temperature and the remote controller set temperature is selected as an input.

  As a result, as soon as the residual heat of the indoor heat exchanger temperature is eliminated, the indoor fan is stopped and the feeling of cold air in the state where the indoor heat exchanger temperature is lowered can be prevented. The feeling of cold wind can be further suppressed by detecting the room temperature and maintaining a predetermined temperature difference.

As described above, the air conditioner of the present invention detects the operation time according to the intake air temperature, the operation ratio of the weak wind, and the direction of the wind direction louver as the user's settings, and inputs the settings to the room when the heating thermo is off. It is characterized by having a control selection means for selecting a fan control method, thereby predicting the indoor air conditioning load and judging the necessity of circulation and suppressing the accumulation of warm air in the indoor upper layer part The feeling of unpleasant cold wind caused by blowing air can be reduced.

  The air conditioner of the present invention reduces the uncomfortable feeling given to the user by the air blow when the heating thermo is off, such as by preventing the cool air feeling when the temperature of the indoor heat exchanger is lowered by the indoor fan control when the heating thermo is off. Can do.

  According to a first aspect of the present invention, there is provided thermo determination means for determining thermo on / off during heating operation from the set temperature of the remote control and the intake air temperature, and at a rotation speed set to be equal to or less than the minimum rotation speed of an indoor fan normally used when the thermo is off. An indoor fan control means for operating the fan or stopping the indoor fan when the thermo is turned off, and an indoor heat exchanger temperature detecting means, and when the heating thermo is turned off by inputting a difference temperature between the indoor heat exchanger temperature and the remote control set temperature. Control means for selecting the indoor fan control method, while the remaining heat of the indoor heat exchanger remains, the air blowing operation is performed to contribute to the heating capacity and circulate, and as soon as the residual heat is removed, the indoor fan is turned off. It can be stopped to prevent the feeling of cold air when the temperature of the indoor heat exchanger is lowered. It detects the room temperature there can be prevented more cold feeling by keeping the predetermined differential temperature.

  According to a second aspect of the invention, there is provided a means for calculating a difference temperature between the indoor heat exchanger temperature and the intake air temperature, and an indoor fan control method at the time of heating thermo-off using the difference temperature between the indoor heat exchanger temperature and the intake air temperature as an input By selecting the control selection means for selecting, the indoor fan is stopped as soon as the residual heat of the indoor heat exchanger temperature is eliminated, and the feeling of cold air in the state where the indoor heat exchanger temperature is lowered can be prevented. By detecting the intake air temperature, it is possible to prevent a feeling of cold wind by maintaining a predetermined differential temperature while offsetting unstable elements such as a short circuit of the blown air.

  3rd invention is provided with the heating operation time calculation means before thermo-off, Control which selects the indoor fan control method at the time of heating thermo-off by inputting the heating operation time and remote control preset temperature from this heating thermo-on to heating thermo-off By having the means, it is possible to predict the air conditioning load in the room and judge the necessity of circulation, thereby suppressing the warm air from accumulating in the upper layer of the room and suppressing the feeling of cold air when unnecessary.

  4th invention is equipped with the minimum rotation speed operation time ratio calculation means of the operation time in the indoor fan minimum rotation speed in the heating operation time from this heating thermo-on to heating thermo-off, and this minimum rotation speed operation time ratio is calculated. By having a control selection means for selecting the indoor fan control method when heating thermo-off as an input, the accumulation of warm air in the indoor upper layer is severe as the minimum number of revolutions, so the necessity of circulation is judged and the indoor upper layer is The accumulation of warm air can be suppressed, and the feeling of cold air can be suppressed when not needed.

  5th invention is equipped with the remote control wind direction setting recognition means before heating thermo-off, and has the control selection means which selects the indoor fan control method at the time of heating thermo-off by using this remote control wind direction setting before heating thermo-off as a wind direction setting However, since the warm air accumulation in the indoor upper layer portion becomes more severe as it is horizontally oriented, the necessity of circulation can be determined and the warm air accumulation in the indoor upper layer portion can be suppressed, and the feeling of cold air can be suppressed when unnecessary.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a schematic diagram of an air conditioner according to an embodiment of the present invention. In FIG. 1, an indoor unit 2 of a ceiling-embedded air conditioner is installed on the ceiling of a room 1 that is an air-conditioned space, and an outdoor unit 3 is installed outdoors. The indoor unit 2 sucks room air from the suction port 5 by the blower 4, and blows out air-conditioned air from the blowout port 7 through the heat exchanger 6. The suction port 5 is provided with a suction temperature sensor 5a for detecting the temperature of the suction air, and the heat exchanger 6 is provided with a heat exchanger temperature sensor 6a. A louver 8 for adjusting the wind direction is provided at the outlet 7, and an arbitrary wind direction can be adjusted by the remote controller 9. In addition to adjusting the wind direction, the remote controller 9 is configured to perform setting operations such as on / off of the air conditioner, operation modes such as cooling and heating, indoor temperature, blown air volume (blower rotation speed), and other timers.

  The indoor unit 2 normally uses a thermo determination means 10 that determines whether the heating operation is on or off from the remote control set temperature T9 and the intake air temperature T5 detected by the intake air temperature sensor 5a, and the indoor fan operation when the heating thermo is off. The indoor fan control means 11 for controlling whether to operate or stop at a light breeze speed LL set lower than the minimum speed L of the indoor fan 4 to be operated, and the indoor fan control means 11 when the heating thermo is off And a control selection means 12 for selecting control of operation or stop of the fan 4.

  And in order to enable the function described below, at least the temperature difference calculating means 13 for calculating the temperature difference DT1 between the indoor heat exchanger temperature T6 detected by the heat exchanger temperature sensor 6a and the remote controller set temperature T9, or The temperature difference calculating means 14 for calculating the difference temperature DT2 between the indoor heat exchanger temperature T6 and the intake air temperature T5, or the heating operation time calculation for calculating the heating operation time Hon from the current heating thermo-on to the heating thermo-off. Of the heating operation time Hon from the time when the means 15 is turned on or when the heating thermo is turned off, the minimum rotation for calculating the L operation time ratio PL of the time HL when the indoor fan 4 is operated at the normal minimum rotation speed L Either of the operation time ratio calculation means 16 or the wind direction setting recognition means 17 for recognizing the remote controller wind direction setting before the heating thermo-off, Control selection means 12 is adapted to select a method of operating the indoor fan 4 by the input obtained by these means. These means are incorporated in the control device 18.

  In the first embodiment, the temperature difference calculating means 13 for calculating the temperature difference DT1 between the indoor heat exchanger temperature T6 detected by the heat exchanger temperature sensor 6a and the remote controller set temperature T9 is included in the indoor unit 2 among them. Is provided. FIG. 2 is a flowchart of the air conditioner according to the first embodiment of the present invention. The operation and action of the air conditioner will be described with reference to FIG.

  When the heating operation is started in STEP1, the remote control set temperature T9 (STEP2), the intake air temperature T5 (STEP3), and the indoor heat exchanger temperature T6 (STEP4) are detected. In STEP5, the thermostat is detected from the remote control set temperature T9 and the intake air temperature. The determination means 10 determines whether the heating thermo is on or off. When it is determined that the heating thermostat is off, the temperature difference DT1 between the remote controller set temperature T9 and the indoor heat exchanger temperature T6 is calculated by the temperature difference calculating means 13 in STEP6. In STEP 7, the differential temperature DT1 is compared with the predetermined temperature difference DTA. If the differential temperature DT1 is equal to or greater than the predetermined temperature difference DTA, it is determined that no cool air sensation is generated even in the air blowing operation. The indoor fan 4 is operated at the slight wind rotation speed LL set to, and if it is less than the predetermined temperature difference DTA, it is determined that a feeling of cold air is generated, and the indoor fan is stopped in STEP9.

  Therefore, the predetermined temperature difference DTA may be set to a level that does not cause a feeling of cold wind, due to the correlation with the light wind speed LL of the indoor fan.

From the above, as long as the residual heat of the indoor heat exchanger 6 remains, the fan is operated to contribute to the heating capacity and circulate, and as soon as the residual heat is removed, the indoor fan 4 is stopped and the indoor heat exchanger temperature is It is possible to prevent a feeling of cold air in a state where T6 is lowered, and it is possible to prevent the feeling of cold air by detecting the room temperature desired by the user from the remote control set temperature T9 and maintaining a predetermined temperature difference.

(Embodiment 2)
In the second embodiment, the indoor unit 2 is provided with a temperature difference calculating means 14 for calculating a temperature difference DT2 between the indoor heat exchanger temperature T6 and the intake air temperature T5. FIG. 3 is a flowchart of the air conditioner according to the second embodiment of the present invention. The operation and action will be described below with reference to FIG.

  The steps up to STEP 5 are the same as those in the first embodiment. When it is determined in STEP5 that the heating thermostat is off, the temperature difference DT2 between the indoor heat exchanger temperature T6 and the intake air temperature T5 is calculated by the temperature difference calculating means 14 in STEP6. In STEP 7, the differential temperature DT2 is compared with the predetermined temperature difference DTB, and if the differential temperature DT2 is equal to or greater than the predetermined temperature difference DTB, it is determined that the cool air feeling does not occur even in the air blowing operation, and in STEP 8, the minimum rotation speed L or less is determined. When the indoor fan is operated at the slight wind rotation speed LL set to be less than the predetermined temperature difference DTB, it is determined that a feeling of cool air is generated, and the indoor fan is stopped in STEP9.

  Therefore, the predetermined temperature difference DTB may be set to a level that does not cause a feeling of cold wind, due to the correlation with the light wind speed LL of the indoor fan.

  From the above, as long as the residual heat of the indoor heat exchanger 6 remains, the fan is operated to contribute to the heating capacity and circulate, and as soon as the residual heat is removed, the indoor fan is stopped and the indoor heat exchanger temperature is increased. A feeling of cold wind in a lowered state can be prevented, and the room temperature desired by the user is detected from the set temperature of the remote controller, and a predetermined temperature difference can be maintained to further prevent the feeling of cold wind.

(Embodiment 3)
In the third embodiment, the indoor unit 2 is provided with heating operation time calculation means 15 for calculating the heating operation time Hon from the current heating thermo-on to the heating thermo-off. FIG. 4 is a flowchart of the air conditioner according to the third embodiment of the present invention. The operation and action will be described below with reference to FIG.

  When the heating operation is started in STEP1, the remote control set temperature T9 (STEP2) and the intake air temperature T5 (STEP3) are detected, and the heating operation time Hon from the current heating thermo-on to the heating thermo-off is calculated by the heating operation time calculation means 15. Calculation (STEP 4), and in STEP 5, the heating thermo-ON / OFF is determined by the thermo determination means 10 from the remote control set temperature T9 and the intake air temperature T5. When it is determined that the heating thermo is off, the heating operation time Hon when the thermo is turned on is compared with the predetermined heating time TA in STEP 6, and if the heating operation time Hon is less than or equal to the predetermined heating time HA, the remote control set temperature T9 is further determined in STEP 7. Comparison with a predetermined set temperature TA is performed. When the remote control set temperature T9 is equal to or lower than the predetermined set temperature TA, the indoor fan is operated at the light wind speed LL set to the minimum speed L or lower during normal operation in STEP8. To stop.

  From the above, it is determined whether the indoor air conditioning load is an air-conditioning operation at a set temperature with a high remote control set temperature T9 and a heating operation with a short heating operation time HA, and the necessity of circulation is determined to determine the warming of the indoor upper layer It is possible to suppress the accumulation of water and to prevent the feeling of cold wind.

(Embodiment 4)
In the fourth embodiment, the indoor unit 2 has an operating time of time HL during which the indoor fan 4 is operated at the normal minimum rotational speed L out of the heating operating time Hon from the current heating thermo-on to the heating thermo-off. Minimum rotation operation time ratio calculating means 16 for calculating the ratio PL is provided. FIG. 5 is a flowchart of the air conditioner according to the fourth embodiment of the present invention. The operation and action will be described below with reference to FIG.

  When the heating operation is started in STEP 1, the remote control set temperature T 9 (STEP 2) and the intake air temperature T 5 (STEP 3) are detected, and the heating operation time from the current heating thermo-on to the heating thermo-off is calculated by the minimum rotation operation time ratio calculating means 16. Of the Hon, the L operation time ratio PL of the time HL during which the indoor fan 4 is operated at the normal minimum rotation speed L is calculated (STEP 4), and the thermo determination means 10 is calculated from the remote control set temperature T9 and the intake air temperature T5 in STEP 5. The heating thermo on / off state is determined by the above. Here, when it is determined that the heating thermo is off, the L operation time ratio PL at the time of the current thermo on is compared with the predetermined ratio PA in STEP 6, and if it is equal to or higher than the predetermined ratio PA, the light breeze set below the minimum rotation speed L in the normal operation in STEP 7 The indoor fan is operated at the rotational speed LL, and when it is less than the predetermined ratio PA, the indoor fan is stopped at STEP8.

  From the above, the necessity of circulation in air-conditioning operation with a short operation time Hon at the minimum rotation speed L with a relatively short reach distance is judged, and accumulation of warm air in the indoor upper layer is suppressed, A feeling can be prevented.

(Embodiment 5)
In the fifth embodiment, the indoor unit 2 is provided with wind direction setting recognition means 17 for recognizing the remote controller wind direction setting before the heating thermo-off. FIG. 6 is a flowchart of the air conditioner according to the fifth embodiment of the present invention. The operation and action will be described below with reference to FIG.

  When the heating operation is started in STEP 1, the remote control set temperature T9 (STEP 2) and the intake air temperature T5 (STEP 3) are detected, the wind direction setting recognition means 17 recognizes the remote control wind direction setting before the heating thermo-off (STEP 4), and the remote control in STEP 5 Heating thermo on / off is determined by the thermo determining means 10 from the set temperature T9 and the intake air temperature T5. When it is determined that the heating thermo is off, it is determined in STEP 6 whether or not the wind direction set by the remote controller wind direction setting means 41 is a horizontal setting. The indoor fan is operated at the set light wind speed LL, and if it is not set horizontally, the indoor fan is stopped at STEP8.

  From the above, when the wind direction is set horizontally, the necessity of circulation is judged, and the accumulation of warm air in the indoor upper layer is suppressed, and the feeling of cold wind can be prevented.

  In addition, although several means for obtaining the input necessary for the control selection means 12 to select the operation method of the indoor fan 4 are listed, these means are not limited to use alone, and are possible. It can be used in combination within a range, and it can be said that it can contribute to the improvement of comfort.

  As described above, the air conditioner according to the present invention can select the indoor fan control at the time of heating thermo-off as the input of the indoor heat exchanger temperature and the remote controller set temperature, and therefore, regardless of the indoor unit form of the air conditioner The present invention can also be applied to ceiling-embedded four-way cassette indoor units, ceiling-suspended indoor units, wall-mounted indoor units, and the like.

The schematic diagram of the air conditioner in embodiment of this invention The flowchart of the air conditioner in Embodiment 1 of this invention Flowchart of the air conditioner in Embodiment 2 of the present invention Flowchart of the air conditioner in Embodiment 3 of the present invention Flowchart of the air conditioner in Embodiment 4 of the present invention Flowchart of the air conditioner in Embodiment 5 of the present invention Conventional air conditioner flowchart

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 Indoor unit 3 Outdoor unit 4 Blower 5 Intake port 5a Intake temperature sensor 6 Heat exchanger 6a Heat exchanger temperature sensor 7 Outlet 9 Remote control 10 Thermo determination means 11 Indoor fan control means 12 Control selection means 13 Differential temperature calculation means 14 Difference Temperature calculation means 15 Heating operation time calculation means 16 Minimum rotation operation time ratio calculation means 17 Wind direction setting recognition means T5 Intake air temperature T6 Indoor heat exchanger temperature T9 Remote control set temperature DT1, DT2 Differential temperature Hon From the current heating thermo-on to the heating thermo-off Heating operation time until HL Time that is operated at the normal minimum speed among HL Hons PL L Operating time ratio L Minimum speed of indoor fans that are normally used LL Light wind speed

Claims (5)

The thermo judgment means for judging the thermo on / off of the heating operation from the remote control set temperature and the intake air temperature, and the operation of the indoor fan at the time of the heating thermo off at a predetermined rotation speed set lower than the minimum rotation speed of the indoor fan normally used. Indoor fan control means for controlling whether to operate or stop, indoor heat exchanger temperature detection means, indoor heat exchanger temperature detected by the indoor heat exchanger temperature detection means, and the remote control setting value Temperature difference calculating means for calculating the difference temperature of the air temperature, and a control selection means for selecting control of the operation or stop of the indoor fan by the indoor fan control means at the time of heating thermo-off using the difference temperature as an input. Air conditioner to do. The thermo judgment means for judging the thermo on / off of the heating operation from the remote control set temperature and the intake air temperature, and the operation of the indoor fan at the time of the heating thermo off at a predetermined rotation speed set lower than the minimum rotation speed of the indoor fan normally used. An indoor fan control means for controlling whether to operate or stop, an indoor heat exchanger temperature detection means, an indoor heat exchanger temperature detected by the indoor heat exchanger temperature detection means, and an intake air temperature. Differential temperature calculation means for calculating the differential temperature, and control selection means for selecting control of the operation or stop of the indoor fan by the indoor fan control means when the heating thermo is turned off, using the differential temperature as an input. Air conditioner. The thermo judgment means for judging the thermo on / off of the heating operation from the remote control set temperature and the intake air temperature, and the operation of the indoor fan at the time of the heating thermo off at a predetermined rotation speed set lower than the minimum rotation speed of the indoor fan normally used. An indoor fan control means for controlling whether to operate or stop, and a heating operation time calculating means for calculating a heating operation time from the current heating thermo-on to the heating thermo-off, and the heating operation time An air conditioner comprising: control selection means for selecting control of operation or stop of an indoor fan by an indoor fan control means at the time of heating thermo-off this time by inputting a remote control set temperature. The thermo judgment means for judging the thermo on / off of the heating operation from the remote control set temperature and the intake air temperature, and the operation of the indoor fan at the time of the heating thermo off at a predetermined rotation speed set lower than the minimum rotation speed of the indoor fan normally used. The operation time of the time when the indoor fan is operated at the normal minimum rotation speed among the indoor fan control means that controls whether to operate or stop, and the time from the current heating thermo-on to the heating thermo-off. A minimum rotation operation time ratio calculation means for calculating the ratio, and a control selection means for selecting the indoor fan operation or stop control by the indoor fan control means at the time of the current heating thermo-off using the minimum rotation operation time ratio as an input An air conditioner characterized by comprising: The thermo judgment means for judging the thermo on / off of the heating operation from the remote control set temperature and the intake air temperature, and the operation of the indoor fan at the time of the heating thermo off at a predetermined rotation speed set lower than the minimum rotation speed of the indoor fan normally used. An indoor fan control means for controlling whether to operate or stop, and a wind direction setting recognition means for recognizing a remote controller wind direction setting of the outlet before heating thermo-off, and when the heating thermo-off is performed with the remote controller wind direction setting as an input An air conditioner comprising control selection means for selecting control of operation or stop of the indoor fan by the indoor fan control means.