JP6956594B2 - Air conditioner - Google Patents

Description

The present invention relates to an air conditioner that controls ventilation in an indoor unit.

Conventionally, an indoor unit of an air conditioner is provided with a fixed mode for fixing the wind direction and a swing mode for swinging the wind direction as a ventilation mode. When the fixed mode is used, the wind direction is fixed, which may cause discomfort such as coldness or heat due to continuous direct contact of the airflow to the occupants. On the other hand, when the swing mode is used, the wind direction changes, which may cause discomfort such as heat or cold due to the fact that the airflow does not directly hit the occupants.

Therefore, in order to solve the above-mentioned problems, an air conditioner for performing an intermittent swing operation in which a fixed mode and a swing mode are alternately performed has been proposed (see, for example, Patent Document 1). In the intermittent swing operation in the air conditioner described in Patent Document 1, when the swing operation is continuously performed, discomfort such as coldness felt by the direct contact of the airflow to the occupants is prevented. In addition, when the operation with the upper and lower wind direction plates fixed is continuously performed, discomfort such as heat due to the fact that the airflow does not directly hit the occupants can be prevented. That is, by performing the intermittent swing operation, it is possible to suppress the discomfort caused by the cold while feeling the coolness caused by the air flow.

Japanese Unexamined Patent Publication No. 2013-134006

However, in the air conditioner described in Patent Document 1, although the swing operation is temporarily performed, the cold air or the warm air reaches only a part of the indoor space, and the air circulates only in a part of the indoor space. Therefore, temperature unevenness occurs on the floor surface in the room.

Further, when the suction air of the indoor unit reaches the set temperature in such a state where the temperature unevenness occurs, it is determined that the indoor temperature has reached the set temperature. Therefore, the compressor turns off even though the entire indoor space has not reached the set temperature.

The present invention has been made in view of the above-mentioned problems in the prior art, and provides an air conditioner capable of making the room temperature uniform, suppressing temperature unevenness, and reducing the frequency of thermo-off. The purpose.

The air conditioner of the present invention is an air conditioner including an outdoor unit having a compressor and an indoor unit having an indoor heat exchanger, and is an indoor blower that supplies indoor air to the indoor heat exchanger. And, the vertical wind direction plate provided at the air outlet of the indoor unit to adjust the wind direction in the vertical direction, the left and right wind direction plate provided at the air outlet of the indoor unit to adjust the wind direction in the horizontal direction, and the indoor temperature are detected. The indoor temperature sensor and the control mode are the first mode in which the indoor blower is intermittently operated with the air blowing direction of the vertical air direction plate and the left and right wind direction plates fixed, and the vertical air direction plate and the left and right wind direction. A control device having a second mode in which the indoor blower is continuously operated while swinging the blowing direction of the plate, and controlling the indoor blower, the vertical wind direction plate, and the left and right wind direction plates according to the control mode. When the indoor temperature detected by the indoor temperature sensor is higher than the set temperature, the control device sets the control mode to the first mode, and the control mode is the first mode. When the indoor temperature detected by the indoor temperature sensor is higher than the second set temperature, which is higher than the set temperature, the control mode is set from the first mode to the second mode.

As described above, according to the air conditioner of the present invention, the air flow reaches the floor surface in the first mode, and the air flow is circulated throughout the space in the second mode to equalize the room temperature and suppress temperature unevenness. However, the frequency of thermo-off can be reduced.

It is the schematic which shows an example of the structure of the air conditioner which concerns on Embodiment 1. FIG. It is a functional block diagram which shows an example of the structure of the control device of FIG. It is a side view which shows an example of the structure of the indoor unit of FIG. It is a front view which shows an example of the structure of the indoor unit of FIG. It is the schematic for demonstrating the 1st mode. It is the schematic for demonstrating the 2nd mode. It is a schematic diagram for demonstrating the state of the room space by the conventional blast control. It is the schematic for demonstrating the state of the room space by the ventilation control of Embodiment 1. FIG. It is a flowchart which shows an example of the flow of the blowing process using the 1st and 2nd modes in the air conditioner 1 which concerns on Embodiment 1. FIG.

Embodiment 1.
Hereinafter, the air conditioner according to the first embodiment of the present invention will be described. FIG. 1 is a schematic view showing an example of the configuration of the air conditioner 1 according to the first embodiment. As shown in FIG. 1, the air conditioner 1 is composed of an indoor unit 10, an outdoor unit 20, and a control device 30.

[Configuration of air conditioner 1]
(Indoor unit 10)
The indoor unit 10 includes an indoor heat exchanger 11 and an indoor blower 12. The indoor heat exchanger 11 exchanges heat between the indoor air supplied by the indoor blower 12 and the refrigerant. As a result, cooling air or heating air, which is conditioned air supplied to the indoor space, is generated. The indoor heat exchanger 11 functions as a condenser that dissipates the heat of the refrigerant to the indoor air and condenses the refrigerant during the heating operation. Further, the indoor heat exchanger 11 functions as an evaporator that evaporates the refrigerant during the cooling operation and cools the indoor air by the heat of vaporization when the refrigerant evaporates.

The indoor blower 12 supplies air to the indoor heat exchanger 11. The rotation speed of the indoor blower 12 is controlled by the control device 30. By controlling the rotation speed, the amount of air blown to the indoor heat exchanger 11 is adjusted. As the indoor blower 12, for example, a centrifugal fan or a multi-blade fan driven by a motor such as a DC (Direct Current) fan motor is used.

Further, the indoor unit 10 is provided with a piping temperature sensor 13 and an indoor temperature sensor 14. The pipe temperature sensor 13 is provided in the pipe on the refrigerant outlet side during the heating operation of the indoor heat exchanger 11. The pipe temperature sensor 13 detects the temperature of the refrigerant flowing out of the indoor heat exchanger 11 during the heating operation, that is, the condensation temperature. The indoor temperature sensor 14 is provided in the vicinity of the indoor blower 12. The indoor temperature sensor 14 detects the temperature of the air taken in by the indoor blower 12, that is, the indoor temperature of the air-conditioned space.

(Outdoor unit)
The outdoor unit 20 includes a compressor 21, a refrigerant flow path switching device 22, an expansion valve 23, an outdoor heat exchanger 24, and an outdoor blower 25. The compressor 21 sucks in the low-temperature and low-pressure refrigerant, compresses the sucked refrigerant, and discharges the high-temperature and high-pressure refrigerant. As the compressor 21, for example, an inverter compressor or the like in which the capacity, which is the amount of refrigerant delivered per unit time, is controlled by changing the compressor frequency or the like is used. The operation of the compressor 21 and the compressor frequency are controlled by the control device 30.

The refrigerant flow path switching device 22 is, for example, a four-way valve, and switches between cooling operation and heating operation by switching the flow direction of the refrigerant. The refrigerant flow path switching device 22 is not limited to the four-way valve described above, and may be used in combination with, for example, other valves.

The expansion valve 23 is composed of, for example, a valve or a capillary capable of controlling the opening degree of an electronic expansion valve or the like, and expands the refrigerant. When the expansion valve 23 is an electronic expansion valve, the opening degree of the expansion valve 23 is controlled by the control device 30. In the example shown in FIG. 1, the expansion valve 23 is provided in the outdoor unit 20, but the present invention is not limited to this, and the expansion valve 23 may be provided in, for example, the indoor unit 10.

The outdoor heat exchanger 24 exchanges heat between the outdoor air supplied from the outdoor blower 25 and the refrigerant supplied from the compressor 21. Specifically, the outdoor heat exchanger 24 functions as a condenser during the cooling operation. Further, the outdoor heat exchanger 24 functions as an evaporator during the heating operation.

The outdoor blower 25 supplies air to the outdoor heat exchanger 24. The rotation speed of the outdoor blower 25 is controlled by the control device 30. By controlling the rotation speed, the amount of air blown to the outdoor heat exchanger 24 is adjusted. As the outdoor blower 25, for example, a centrifugal fan or a multi-blade fan driven by a motor such as a DC fan motor is used.

In the air conditioner 1 according to the first embodiment, the compressor 21, the refrigerant flow path switching device 22, the indoor heat exchanger 11, the expansion valve 23, and the outdoor heat exchanger 24 are connected in an annular shape by the refrigerant pipe 2. 3. The refrigerant circuit 3 is configured. Then, the refrigerant circulates inside the refrigerant circuit 3 while repeating compression and expansion to form a heat pump.

(Control device)
The control device 30 performs the operation of the entire air conditioner 1 including the indoor unit 10 and the outdoor unit 20 based on, for example, a setting by the user's operation for a remote controller (not shown) and various information received from each part of the air conditioner 1. Control. In particular, the control device 30 has the compressor frequency of the compressor 21, the rotation speed of the indoor blower 12, and the vertical wind direction plates 16a and 16b and the left and right wind direction plates 17a, which will be described later, based on the indoor temperature supplied from the indoor temperature sensor 14. The angle of 17b and the like are controlled.

FIG. 2 is a functional block diagram showing an example of the configuration of the control device 30 of FIG. The control device 30 is composed of hardware such as a circuit device that realizes various functions by executing software on an arithmetic unit such as a microcomputer. In this example, the control device 30 is provided outside the outdoor unit 20 and the indoor unit 10, but the present invention is not limited to this, and the control device 30 may be provided in any of the outdoor unit 20 and the indoor unit 10.

As shown in FIG. 2, the control device 30 includes a temperature comparison unit 31, a rotation speed determination unit 32, a frequency determination unit 33, a vertical angle determination unit 34, a left / right angle determination unit 35, an operation control unit 36, and a storage unit 37. ing. Note that, in FIG. 2, only the portion related to the first embodiment is illustrated, and the illustration and description of the other portions are omitted.

Temperature comparing unit 31, the indoor temperature _{T a} which is supplied from the indoor temperature sensor 14 is compared with the set temperature _{T SET} for the room temperature stored in the storage unit 37, than the room temperature _{T a} is the set temperature _{T SET} Judge whether it is expensive or not. The temperature comparison unit 31 supplies the comparison result to the rotation speed determination unit 32, the frequency determination unit 33, the vertical angle determination unit 34, and the left / right angle determination unit 35.

The rotation speed determination unit 32 determines the rotation speed of the indoor blower 12 based on the comparison result supplied from the temperature comparison unit 31 and the condensation temperature of the indoor heat exchanger 11 supplied from the pipe temperature sensor 13. The rotation speed determination unit 32 supplies the rotation speed information indicating the determined rotation speed to the operation control unit 36.

The frequency determination unit 33 determines the compressor frequency of the compressor 21 based on the comparison result supplied from the temperature comparison unit 31. The frequency determination unit 33 supplies the operation control unit 36 with frequency information indicating the determined compressor frequency.

The vertical angle determining unit 34 determines the operation including the opening degree and the angle of the vertical wind direction plates 16a and 16b based on the comparison result supplied from the temperature comparing unit 31. The vertical angle determining unit 34 supplies the vertical angle information indicating the determined operation of the vertical wind direction plates 16a and 16b to the motion control unit 36.

The left-right angle determination unit 35 determines the operation including the angles of the left-right wind direction plates 17a and 17b based on the comparison result supplied from the temperature comparison unit 31. The left-right angle determination unit 35 supplies the left-right angle information indicating the operation of the determined left-right wind direction plates 17a and 17b to the operation control unit 36.

The operation control unit 36 generates control information for controlling the rotation speed of the indoor blower 12 based on the rotation speed information supplied from the rotation speed determination unit 32, and supplies the control information to the indoor blower 12. Further, the operation control unit 36 generates control information for controlling the compressor frequency of the compressor 21 based on the frequency information supplied from the frequency determination unit 33, and supplies the control information to the compressor 21. Further, the motion control unit 36 generates control information for controlling the operation of the vertical wind direction plates 16a and 16b based on the vertical angle information supplied from the vertical angle determination unit 34, and supplies the control information to the vertical wind direction plates 16a and 16b. do. Furthermore, the motion control unit 36 generates control information for controlling the operation of the left and right wind direction plates 17a and 17b based on the left and right angle information supplied from the left and right angle determination unit 35, and causes the left and right wind direction plates 17a and 17b to generate control information. Supply.

The storage unit 37 stores various setting information regarding the compressor frequency, the room temperature, the condensation temperature of the compressor 21, and the operations of the vertical wind direction plates 16a and 16b and the left and right wind direction plates 17a and 17b. The storage unit 37 reads out various setting information stored in response to requests from each of the temperature comparison unit 31, the rotation speed determination unit 32, the frequency determination unit 33, the vertical angle determination unit 34, and the left / right angle determination unit 35. Supply to each.

[Structure of indoor unit]
Next, the arrangement of each component in the indoor unit 10 will be described. FIG. 3 is a side view showing an example of the structure of the indoor unit 10 of FIG. FIG. 4 is a front view showing an example of the structure of the indoor unit 10 of FIG. As shown in FIGS. 3 and 4, the indoor unit 10 has an indoor heat exchanger 11, an indoor blower 12, a pipe temperature sensor 13, and an indoor temperature sensor 14 arranged in a housing.

Further, the housing of the indoor unit 10 is provided with a suction port (not shown) for sucking indoor air and an air outlet 15 for sending air into the room. The air outlet 15 is provided with a plurality of vertical wind direction plates 16a and 16b, and a plurality of left and right wind direction plates 17a and 17b corresponding to each of the vertical wind direction plates.

The vertical angles of the vertical wind direction plates 16a and 16b are adjusted based on the control of the control device 30. By adjusting the vertical angle of the vertical wind direction plates 16a and 16b, the vertical air blowing direction from the air outlet 15 can be adjusted. Each of the vertical wind direction plates 16a and 16b operates independently of each other. The vertical wind direction plates 16a and 16b have a horizontal angle of 0 ° with respect to the floor surface, a vertical upper angle of + α °, and a vertical lower angle of −α °.

The angles of the left and right wind direction plates 17a and 17b are adjusted in the left-right direction based on the control of the control device 30, and the left-right direction of air blown from the air outlet 15 is adjusted. The left and right wind direction plates 17a and 17b operate independently of each other. The left and right wind direction plates 17a and 17b have an angle of 0 ° when the indoor unit 10 is viewed from the front, an angle of + θ ° in the right direction, and an angle of −θ ° in the left direction.

In the examples shown in FIGS. 3 and 4, a plurality of vertical wind direction plates 16a and 16b and a plurality of left and right wind direction plates 17a and 17b are provided, but the present invention is not limited to this, and for example, one vertical wind direction plate and one, respectively. Left and right wind direction plates may be provided.

[Operation of air conditioner]
Next, the operation of the refrigerant in the air conditioner 1 having the above configuration will be described. In the example shown in FIG. 1, the state shown by the solid line of the refrigerant flow path switching device 22 is the state of the heating operation mode. Here, only the operation of the refrigerant in the heating operation mode related to the present invention will be described, and the description of the cooling operation mode will be omitted.

(Heating operation mode)
In the heating operation mode, the refrigerant flow path switching device 22 is switched so that the discharge side of the compressor 21 and the indoor heat exchanger 11 are connected, and the outdoor heat exchanger 24 and the suction side of the compressor 21 are connected. Be done. The low-temperature and low-pressure refrigerant is compressed by the compressor 21 and discharged as a high-temperature and high-pressure gas refrigerant. The high-temperature and high-pressure gas refrigerant discharged from the compressor 21 flows out from the outdoor unit 20 via the refrigerant flow path switching device 22 and flows into the indoor unit 10.

The high-temperature and high-pressure gas refrigerant that has flowed into the indoor unit 10 flows into the indoor heat exchanger 11. The high-temperature and high-pressure gas refrigerant that has flowed into the indoor heat exchanger 11 exchanges heat with the indoor air taken in by the indoor blower 12 and condenses, becomes a high-pressure liquid refrigerant, and flows out of the indoor heat exchanger 11. The high-pressure liquid refrigerant flowing out of the indoor heat exchanger 11 flows out from the indoor unit 10 and flows into the outdoor unit 20.

The high-pressure liquid refrigerant that has flowed into the outdoor unit 20 flows into the expansion valve 23. The high-pressure liquid refrigerant that has flowed into the expansion valve 23 is decompressed by the expansion valve 23 to become a low-temperature low-pressure gas-liquid two-phase refrigerant that flows into the outdoor heat exchanger 24. The low-temperature, low-pressure gas-liquid two-phase refrigerant that has flowed into the outdoor heat exchanger 24 exchanges heat with the outdoor air, absorbs and evaporates heat, becomes a low-temperature, low-pressure gas refrigerant, and flows out of the outdoor heat exchanger 24. The low-temperature low-pressure gas refrigerant flowing out of the outdoor heat exchanger 24 passes through the refrigerant flow path switching device 22 and is sucked into the compressor 21.

(Blower control)
Next, the ventilation control by the air conditioner 1 according to the first embodiment will be described. The air conditioner 1 according to the first embodiment has a first mode and a second mode as a blowing mode, and blows air in either the first mode or the second mode based on the room temperature. In the following, the heating operation will be described as an example.

(1st mode)
The first mode is a mode for improving the comfort of the feet by fixing the angles of the vertical wind direction plates 16a and 16b and the angles of the left and right wind direction plates 17a and 17b to blow air. Controller 30, when the room temperature T _a detected by the indoor temperature sensor 14 is larger than the set temperature T _SET, performing the blowing according to the first mode. The set temperature T _SET is stored in advance in the storage unit 37.

FIG. 5 is a schematic view for explaining the first mode. As shown in FIG. 5, in the first mode, the control device 30 sets the compressor frequency of the compressor 21 from the frequency during normal operation to the set frequency f _FIO , and continues the operation of the compressor 21. The set frequency f _FIO is a lower limit frequency at which the airflow reaches the floor surface, and is stored in advance in the storage unit 37.

Further, the control device 30 sets the rotation speed of the indoor blower 12 to the set rotation speed N _FIO, and turns the indoor blower 12 ON or OFF to perform intermittent operation. The set rotation speed N _FIO is stored in advance in the storage unit 37. Further, the control device 30 changes the angles of the vertical wind direction plates 16a and 16b to the downward or closed state.

Here, the ON / OFF timing of the indoor blower 12 and the angles of the vertical wind direction plates 16a and 16b are determined based on the condensation temperature CT of the indoor heat exchanger 11. In the first embodiment, two determination values of _{temperature T 1} and temperature T _{2 are preset for the condensation temperature CT.} Then, the condensation temperature CT changes up and down between _{the temperature T 1} and the temperature T _2.

At this time, the indoor blower 12 starts the operation when the condensation temperature CT exceeds the _{temperature T 1} , and stops the operation when the _{condensation temperature CT falls below the temperature T 2.} The angles of the vertical wind direction plates 16a and 16b are set to −90 ° when the condensation temperature CT exceeds the _{temperature T 1,} and are set to the closed state when _{the condensation temperature CT falls below the temperature T 2.}

As shown in FIG. 5, when the operation of the indoor blower 12 is stopped (time t ₀ ), the condensation temperature CT of the indoor heat exchanger 11 rises _{from the temperature T 2} to the temperature T _1. When the condensation temperature CT _{reaches the temperature T 1} , the indoor blower 12 starts operation and the angles of the vertical wind direction plates 16a and 16b are set to −90 ° (time t ₁ ).

During the operation of the indoor blower 12, the indoor heat exchanger 11 is cooled by the blower, so that the condensation temperature CT drops from the temperature T _{1 to the temperature T 2.} Then, when the condensation temperature CT _{drops to the temperature T 2,} the operation of the indoor blower 12 is stopped, and the angles of the vertical wind direction plates 16a and 16b are set to the closed state (time t ₂ ).

After that, in the same manner, while the indoor blower 12 is stopped, the condensation temperature CT rises from the temperature T _{2 to the temperature T 1} , and when the condensation temperature CT _{reaches the temperature T 1} , the operation of the indoor blower 12 is started. At the same time, the angles of the vertical wind direction plates 16a and 16b are set to −90 ° (time t ₃ ). Further, when the condensation temperature CT _{drops to the temperature T 2} , the operation of the indoor blower 12 is stopped, and the angles of the vertical wind direction plates 16a and 16b are set to the closed state.

As described above, in the first mode, the vertical wind direction plates 16a and 16b are set downward while _{the compressor 21 operates at the set frequency f FIO} and the indoor blower 12 operates _{intermittently at the rotation speed N FIO.} The air is blown. As a result, the air blown intermittently from the indoor unit 10 reaches the floor surface, so that the comfort of the feet of the occupants can be improved.

The temperature T ₁ corresponds to the "first threshold value" in the present invention. Further, the temperature T ₂ corresponds to the "second threshold value" in the present invention.

(Second mode)
In the second mode, the vertical wind direction plates 16a and 16b are swung up and down at a set angle, and the left and right wind direction plates 17a and 17b are swung left and right at a set angle to blow air, and the air is circulated in the entire indoor space. This is a mode for making the temperature uniform. The second mode is a mode to be executed after the first mode, the control device 30, if the indoor temperature T _a detected by the indoor temperature sensor 14 is larger than the set temperature T _{SET +} [Delta] T, the second Performs ventilation according to the mode.

FIG. 6 is a schematic view for explaining the second mode. In FIG. 6, the vertical wind direction plate 16a and the left and right wind direction plates 17a provided on the left side of the indoor unit 10 when viewed from the front are respectively indicated by "L", and the vertical wind direction plate 16b and the left and right wind direction plates 16b provided on the right side are respectively. Each of the wind direction plates 17b is indicated by "R".

As shown in FIG. 6, in the second mode, the control device 30 sets the compressor frequency to the set frequency f _SIG and sets the rotation speed of the indoor blower 12 in a state where the operation of the compressor 21 is continued. The rotation speed _{is set to N SIG} , and the indoor blower 12 is continuously operated. The set frequency f _SIG and the set rotation speed N _SIG are stored in advance in the storage unit 37.

Further, the control device 30 swings the vertical wind direction plates 16a and 16b and the left and right wind direction plates 17a and 17b. The vertical wind direction plates 16a and 16b can swing in the range of −α ° to + α °, where the horizontal angle with respect to the floor surface is 0 °. The angle α ° at this time is a preset value. Further, the vertical wind direction plates 16a and 16b swing in opposite directions. That is, when the vertical wind direction plate 16a swings upward in the positive direction, the vertical wind direction plate 16b swings downward in the negative direction. Further, when the vertical wind direction plate 16a swings downward, the vertical wind direction plate 16b swings upward.

The left and right wind direction plates 17a and 17b can swing in the range of −θ ° to + θ °, where the angle when the indoor unit 10 is viewed from the front is 0 °. The angle θ ° at this time is a preset value. Further, the left and right wind direction plates 17a and 17b swing in opposite directions. That is, when the left and right wind direction plates 17a swing to the right in the positive direction, the left and right wind direction plates 17b swing to the left in the negative direction. When the left and right wind direction plates 17a swing to the left, the left and right wind direction plates 17b swing to the right.

The control device 30 controls the swing direction so that when the vertical wind direction plates 16a and 16b and the left and right wind direction plates 17a and 17b are swung, the airflow circulates throughout the space. Further, the speeds of the vertical wind direction plates 16a and 16b and the left and right wind direction plates 17a and 17b are the same. That is, the time required for the angles of the vertical wind direction plates 16a and 16b to change from + α ° to −α ° and the time required for the angles of the left and right wind direction plates 17a and 17b to change from + θ ° to −θ ° are the same. The speed of the swing is controlled so as to be.

Specifically, as shown in FIG. 6, at time t _11, the control device 30, the angle of the horizontal flaps 16a are + alpha °, as the angle of the vertical airflow direction plate 16b is-.alpha. ° flapping 16a And 16b are controlled. Further, the control device 30 controls the left and right wind direction plates 17a and 17b so that the angle of the left and right wind direction plates 17a is −θ ° and the angle of the left and right wind direction plates 17b is + θ °.

At time _{t 12,} the control device 30, angle-.alpha. ° of horizontal flaps 16a, controls the horizontal flaps 16a and 16b so that the angle of vertical airflow direction plate 16b is + alpha °. Further, the control device 30 controls the left and right wind direction plates 17a and 17b so that the angle of the left and right wind direction plates 17a is + θ ° and the angle of the left and right wind direction plates 17b is −θ °.

At time _{t 13,} the control device 30, similar to the case at time _{t 11,} to control the horizontal flaps 16a and 16b, and the vertical louvers 17a and 17b. At time _{t 14,} the control device 30, similar to the case at time _{t 12,} to control the horizontal flaps 16a and 16b, and the vertical louvers 17a and 17b.

At time _{t 15,} the control device 30, the angle of the horizontal flaps 16a are + alpha °, the angle of vertical airflow direction plate 16b to control the horizontal flaps 16a and 16b so that the-.alpha. °. Further, the control device 30 controls the left and right wind direction plates 17a and 17b so that the angle of the left and right wind direction plates 17a is + θ ° and the angle of the left and right wind direction plates 17b is −θ °.

At time _{t 16,} the control device 30, angle-.alpha. ° of horizontal flaps 16a, controls the horizontal flaps 16a and 16b so that the angle of vertical airflow direction plate 16b is + alpha °. Further, the control device 30 controls the left and right wind direction plates 17a and 17b so that the angle of the left and right wind direction plates 17a is −θ ° and the angle of the left and right wind direction plates 17b is + θ °.

At time _{t 17,} the control device 30, similar to the case at time _{t 15,} to control the horizontal flaps 16a and 16b, and the vertical louvers 17a and 17b. At time _{t 18,} the control device 30, similar to the case at time _{t 16,} to control the horizontal flaps 16a and 16b, and the vertical louvers 17a and 17b.

That is, in the second mode, during the period from the time t ₁₁ to t _18, the air from the left side of the outlet 15 of the indoor unit 10 in the order of "the top left → the bottom right → the top left → the bottom right → the top right → lower left → upper right → lower left" Is blown. In addition, air is blown from the right side of the air outlet 15 in the order of "lower right → upper left → lower right → upper left → lower left → upper right → lower left → upper right".

In the first embodiment, the vertical wind direction plates 16a and 16b and the left and right wind direction plates 17a and 17b are controlled in this way. This allows the airflow to circulate throughout the space. Further, by executing the second mode after the first mode, the air locally warmed in the first mode is circulated by the air flow blown by the second mode, so that the temperature of the entire space is made uniform. Can be done.

The angle control between the vertical wind direction plates 16a and 16b and the left and right wind direction plates 17a and 17b is not limited to this example, and any kind of control can be performed as long as the airflow sent from the air outlet 15 can be circulated throughout the space. It may be a direction and an order. Further, when the airflow is sent upward from the air outlet 15, the air volume may be larger than that when the airflow is sent downward. This is to allow the airflow to reach the inner side of the space opposite to the position where the indoor unit 10 is provided.

FIG. 7 is a schematic view for explaining the state of the indoor space by the conventional ventilation control. FIG. 8 is a schematic view for explaining the state of the indoor space by the ventilation control of the first embodiment.

As shown in FIG. 7, the air sent from the conventional indoor unit is circulated only in a part of the indoor space by the temporary swing operation. Therefore, temperature unevenness occurs between the region where air circulates and the region where air does not circulate. Then, when the suction air of the indoor unit reaches the set temperature in a state where the temperature unevenness occurs, the compressor turns off even though the entire indoor space does not reach the set temperature.

On the other hand, as shown in FIG. 8, in the first embodiment, the indoor unit 10 fixes the wind direction downward by the first mode, causes the airflow to reach the vicinity of the floor surface, and then performs the second mode. Swing the wind direction to circulate the air throughout the room. Therefore, the temperature of the entire space can be made uniform. Further, since the compressor 21 does not turn off the thermostat when the local indoor space reaches the set temperature, the frequency of the thermo-turning off can be reduced.

(Blower processing)
FIG. 9 is a flowchart showing an example of the flow of the air blowing process using the first and second modes in the air conditioner 1 according to the first embodiment. In step S1, the indoor temperature sensor 14 detects the room temperature _{T a,} and supplies the detected indoor temperature _{T a} of the temperature comparing section 31.

In step S2, the temperature comparing unit 31, the indoor temperature _{T a} detected in step S1, compared with the set temperature _{T SET} stored in the storage unit 37, higher than the room temperature _{T a} is the set temperature _{T SET} Judge whether or not. If the room temperature _{T a} is equal to or less than the set temperature _{T SET;} (step S2 No), the flow returns to step S1.

If the room temperature _{T a} is higher than the set temperature _{T SET;} (step S2 Yes), in step S3, the blowing process according to the first mode is executed. In step S3, the rotation speed determination unit 32 supplies the operation control unit 36 with rotation speed information for _{setting the rotation speed of the indoor blower 12 to either NFIO} or 0 based on the condensation temperature of the indoor heat exchanger 11. do. The frequency determination unit 33 supplies the operation control unit 36 with frequency information for setting the compressor frequency of the compressor 21 to f _FIO. The vertical angle determining unit 34 supplies the vertical angle information for making the angles of the vertical wind direction plates 16a and 16b downward to the motion control unit 36. The left-right angle determining unit 35 supplies the operation control unit 36 with left-right angle information for making the angles of the left-right wind direction plates 17a and 17b downward.

The operation control unit 36 controls the indoor blower 12, the compressor 21, the vertical wind direction plates 16a and 16b, and the left and right wind direction plates 17a and 17b based on the rotation speed information, the frequency information, the vertical angle information, and the horizontal angle information. Output control information. Then, the indoor blower 12, the compressor 21, the vertical wind direction plates 16a and 16b, and the left and right wind direction plates 17a and 17b each operate based on the received control information.

In step S4, the indoor temperature sensor 14 detects the room temperature _{T a,} and supplies the detected indoor temperature _{T a} of the temperature comparing section 31. In step S5, the temperature comparing section 31 determines the room temperature _{T a} detected in step S4, compared with the set temperature _{T SET} + [Delta] T, whether the indoor temperature _{T a} is higher than the set temperature _{T SET} + [Delta] T do. If the room temperature _{T a} is equal to or less than the set temperature _{T SET} + _ΔT; (step S5 No), the process returns to step S4.

If the room temperature _{T a} is higher than the set temperature _{T SET} + _ΔT; (step S5 Yes), in step S6, the blowing process according to the second mode is executed. In step S6, the rotation speed determination unit 32 supplies the operation control unit 36 with the rotation speed information for setting the rotation speed of the indoor blower 12 to N _SIG. The frequency determination unit 33 supplies the operation control unit 36 with frequency information for setting the compressor frequency of the compressor 21 to f _SIG. The vertical angle determining unit 34 supplies the vertical angle information for swinging the vertical wind direction plates 16a and 16b to the motion control unit 36. The left-right angle determining unit 35 supplies the left-right angle information for swinging the left-right wind direction plates 17a and 17b to the operation control unit 36.

The operation control unit 36 controls the indoor blower 12, the compressor 21, the vertical wind direction plates 16a and 16b, and the left and right wind direction plates 17a and 17b based on the rotation speed information, the frequency information, the vertical angle information, and the horizontal angle information. Output control information. Then, the indoor blower 12, the compressor 21, the vertical wind direction plates 16a and 16b, and the left and right wind direction plates 17a and 17b each operate based on the received control information.

In step S7, the indoor temperature sensor 14 detects the room temperature _{T a,} and supplies the detected indoor temperature _{T a} of the temperature comparing section 31. In step S8, the indoor temperature _{T a} detected in step S7, by comparing the thermo OFF temperature _{T OFF} which is stored in the storage unit 37, whether or not the room temperature _{T a} is higher than the thermo-OFF temperature _{T OFF} to decide. The thermo-OFF temperature T _OFF is set to a value higher than the set temperature T _{SET + ΔT.}

If the room temperature _{T a} is higher than the thermo-OFF temperature _{T OFF} (step S8; Yes), the operation control unit 36, in step S9, and outputs the control information for stopping the operation of the compressor 21, the process steps Return to S1.

On the other hand, if the indoor temperature _{T a} is less than or equal to the thermo OFF temperature _{T OFF;} (step S8 No), the process proceeds to step S10. In step S10, the indoor temperature sensor 14 detects the room temperature _{T a,} and supplies the detected indoor temperature _{T a} of the temperature comparing section 31.

In step S11, the temperature comparing section 31 determines the room temperature _{T a} detected in step S10, is compared with the set temperature _{T SET} + [Delta] T, whether the indoor temperature _{T a} is higher than the set temperature _{T SET} + [Delta] T do. If the room temperature _{T a} is higher than the set temperature _{T SET} + _ΔT; (step S11 Yes), the process returns to step S6. If the room temperature _{T a} is equal to or less than the set temperature _{T SET} + _ΔT; (step S11 No), the process returns to step S1.

As described above, the air conditioning apparatus 1 according to the first embodiment, when the room temperature T _a is higher than the set temperature T _SET, the control mode, by fixing the air blowing direction from the air outlet 15, the indoor This is the first mode in which the blower 12 is operated intermittently. The air conditioner 1, the control mode is a first mode, when the room temperature T _a is higher than the set temperature T _{SET +} [Delta] T, the control mode, by swinging the blowing direction of the air outlet 15, The mode is changed to the second mode in which the indoor blower 12 is continuously operated.

By operating in the first mode in this way, the air blown from the indoor unit 10 reaches the floor surface, so that the comfort of the feet of the occupants can be improved. Further, by operating in the second mode after the first mode, the air flows in various directions of the space, so that the air flow can be circulated throughout the space and the temperature of the entire space can be made uniform. Then, by circulating air throughout the space to make the temperature of the entire space uniform, it is possible to reduce the frequency of thermo-off caused by warming a local space such as around the indoor unit 10.

Further, the control device 30, when the condensation temperature CT exceeds the temperature T _1, to set the angle of the horizontal flaps 16a and 16b downward, and sets the angle of the vertical louvers 17a and 17b in the front direction, Set the rotation speed of the indoor blower 12 to the set rotation speed N _FIO . Then, when the condensation temperature CT _{exceeds the temperature T 2} , the control device 30 sets the vertical wind direction plates 16a and 16b to the closed state and stops the indoor blower 12. As a result, the air blown intermittently reaches the floor surface, so that the comfort of the feet of the occupants can be improved.

Further, in the air conditioner 1, when the control mode is the second mode, the vertical wind direction plates 16a and 16b swing in different directions, and the left and right wind direction plates 17a and 17b swing in different directions. As a result, the air flows in various directions in the space, so that the air flow can be circulated throughout the space.

Although the first embodiment of the present invention has been described above, the present invention is not limited to the first embodiment of the present invention described above, and various modifications and applications are made without departing from the gist of the present invention. Is possible. For example, in the above-mentioned example, the case where the blower treatment according to the first embodiment is applied during the heating operation has been described as an example, but the present invention is not limited to this, and the blower treatment may be applied during the cooling operation.

Further, in the first embodiment, the case where the two vertical wind direction plates 16a and 16b and the two left and right wind direction plates 17a and 17b are configured has been described, but this is not limited to this example. For example, three or more vertical wind direction plates are provided side by side in the width direction when viewed from the front of the indoor unit 10, and the width of the three or more left and right wind direction plates corresponds to each of the above vertical wind direction plates. It may be configured to be provided side by side in the direction. In this case, in the second mode, each of the plurality of vertical wind direction plates swings in different directions in the vertical direction. Further, each of the plurality of left and right wind direction plates swings in different directions to the left and right.

Further, for example, the air conditioner 1 may be configured to detect the temperature in the space by using an infrared sensor or the like. As a result, the temperature unevenness in the space is detected, and the air can be blown intensively to the place where the temperature unevenness occurs, so that the temperature of the entire indoor space can be efficiently made uniform.

1 Air conditioner, 2 Refrigerant piping, 3 Refrigerant circuit, 10 Indoor unit, 11 Indoor heat exchanger, 12 Indoor blower, 13 Pipe temperature sensor, 14 Indoor temperature sensor, 15 Outlet, 16a, 16b Vertical wind direction plate, 17a, 17b Left and right wind direction plate, 20 outdoor unit, 21 compressor, 22 refrigerant flow path switching device, 23 expansion valve, 24 outdoor heat exchanger, 25 outdoor blower, 30 control device, 31 temperature comparison unit, 32 rotation speed determination unit, 33 Frequency determination unit, 34 vertical angle determination unit, 35 left / right angle determination unit, 36 motion control unit, 37 storage unit.

Claims (5)

An air conditioner including an outdoor unit having a compressor and an indoor unit having an indoor heat exchanger.
An indoor blower that supplies indoor air to the indoor heat exchanger,
A vertical wind direction plate provided at the air outlet of the indoor unit to adjust the vertical wind direction,
A left and right wind direction plate provided at the air outlet of the indoor unit to adjust the wind direction in the left and right direction,
An indoor temperature sensor that detects the indoor temperature and
As the control mode, the first mode in which the indoor blower is operated intermittently with the air blowing direction by the vertical wind direction plate and the left and right wind direction plates fixed, and the air blowing direction by the vertical air direction plate and the left and right wind direction plates are swung. It has a second mode in which the indoor blower is continuously operated while the indoor blower is operated, and includes the indoor blower, the vertical wind direction plate, and a control device for controlling the left and right wind direction plates according to the control mode.
The control device is
When the indoor temperature detected by the indoor temperature sensor is higher than the set temperature, the control mode is set to the first mode.
When the control mode is the first mode and the room temperature detected by the room temperature sensor is higher than the second set temperature higher than the set temperature, the control mode is changed from the first mode to the second mode. An air conditioner characterized by being set to a mode. Further equipped with a pipe temperature sensor for detecting the condensation temperature of the indoor heat exchanger,
The control device is
The air conditioner according to claim 1, wherein when the control mode is the first mode, the ON / OFF timing of the intermittent operation of the indoor blower is determined based on the condensation temperature. The control device is
It has a storage unit that stores a first threshold value and a second threshold value lower than the first threshold value with respect to the condensation temperature.
When the condensation temperature exceeds the first threshold value, the angle of the vertical wind direction plate is set downward, the angle of the left and right wind direction plates is set in the front direction, and the rotation speed of the indoor blower is set. Set to number,
The air conditioner according to claim 2, wherein when the condensation temperature exceeds the second threshold value, the vertical wind direction plate is set to a closed state and the indoor blower is stopped. The vertical wind direction plate is composed of a plurality of vertical wind direction plates provided side by side in the width direction when viewed from the front.
The claim is characterized in that the left and right wind direction plates are composed of a plurality of left and right wind direction plates provided side by side in the width direction when viewed from the front so as to correspond to each of the plurality of upper and lower wind direction plates. Item 3. The air conditioner according to any one of Items 1 to 3. When the control mode is the second mode,
The plurality of vertical wind direction plates swing in different directions up and down,
The air conditioner according to claim 4, wherein the plurality of left and right wind direction plates swing in different directions.

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