JPH09152180A - Air conditioning by air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make air reach almost the floor following heat exchange of the air even when the indoor temperature has reached the vicinity of a set point. SOLUTION: When the indoor temperature Ti is in a prescribed range including a set temperature Tm (102, 104; Y), the supply of air is directed most downward (108) and, when the set air volume is in a weak-draft mode or lower, a shift to an air-volume node is effected (110; Y, 112). The switching frequency of an inverter circuit is controlled (116-122) in a manner of putting the coil temperature Tc of the coil in an indoor heat exchanger in a prescribed range including a set temperature T40.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning method for an air conditioner, and more particularly to a first air volume mode and a second air volume having a larger air volume per unit time than the first air volume mode.
The air temperature mode is set to any one of a plurality of air flow modes including the air flow mode, and the temperature inside the room is set by sending conditioned air that has undergone heat exchange to any of the air flow directions set to any one of the air flow directions including directly below. The present invention relates to an air conditioning method for an air conditioner that controls a controlled temperature.

[0002]

2. Description of the Related Art Conventionally, an air conditioning method for an air conditioner has set a heat-exchanged indoor air to one of a strong wind mode, a medium wind mode, a weak wind mode, and a slight wind mode in which the amount of air per unit time decreases in order. When the indoor temperature reaches near the set temperature, the air volume mode is changed from the weak air mode to the slight air mode, and the indoor temperature is controlled to reach the set temperature. doing.

By the way, in the air conditioning method of the air conditioner, particularly when the air conditioner is operated in the heating mode, regardless of the air volume mode set until the temperature of the room reaches the vicinity of the set temperature, the medium air mode or There is a so-called foot heating control that blows heat-exchanged air into the room in a strong wind mode with the wind direction being the lowest.

As described above, the foot heating control blows the heat-exchanged air into the room in the medium wind mode to the strong wind mode with the wind direction being the lowest, so that the warm air reaches the vicinity of the floor surface and the user Warm air reaches to the feet, improving comfort.

[0005]

However, in the foot heating control, when the difference between the room temperature and the set temperature is large, the air that has been heat-exchanged in the normal strong wind mode and the medium wind mode is blown into the room, so that the room temperature is controlled. When the temperature reaches near the set temperature, the air volume mode is changed from the weak wind mode to the light wind mode. Therefore, when the temperature in the room reaches the vicinity of the set temperature, warm air does not reach the vicinity of the floor surface, and the comfort feeling is reduced.

The present invention has been made in view of the above facts, and air conditioning of an air conditioner capable of reaching the floor surface by the heat-exchanged air even when the temperature in the room reaches near the set temperature. The purpose is to provide a method.

[0007]

To achieve the above object, the invention according to claim 1 includes a plurality of first air volume modes and a second air volume mode in which the air volume per unit time is larger than that of the first air volume mode. The indoor air is supplied to the heat exchanger at the set air volume mode, and the conditioned air that has been heat-exchanged by this heat exchanger is blown into the room to set the room temperature to the set temperature. In the air conditioning method of the air conditioner controlled to, when the predetermined condition is satisfied, the conditioned air is blown into the room in the second air volume mode regardless of the set air volume mode, and the air and heat in the room The temperature of the heat exchanger to be replaced is detected, and the detected temperature is controlled within a predetermined range.

That is, the air conditioning method of the air conditioner according to the present invention has a plurality of air volume modes including a first air volume mode and a second air volume mode having a larger air volume per unit time than the first air volume mode. The air in the room is supplied to the heat exchanger in any one of the set air volume modes, and the conditioned air heat-exchanged by the heat exchanger is blown into the room to control the temperature of the room to the set temperature. Note that this control is called indoor temperature control.

Here, in the plurality of air volume modes, for example,
There are a slight wind mode, a weak wind mode, a medium wind mode, and a strong wind mode in which the amount of air per unit time increases in order. Then, the first air volume mode corresponds to the light wind mode and the weak wind mode, and the second air volume mode corresponds to, for example, the medium wind mode and the strong wind mode.

The mode in which the indoor temperature control is operated is the heating operation. The air volume mode and the set temperature of the room temperature may be set when, for example, an instruction signal is transmitted by the remote controller and received.
It may be set when a predetermined button is pressed from an operation panel or the like connected to the air conditioner.

Further, according to the present invention, when a predetermined condition is satisfied, the conditioned air is blown into the room in the second air flow mode regardless of the set air flow mode, and heat is exchanged with the detected indoor air. Keep the temperature of the heat exchanger within the specified range. Note that this control is called foot control.

In this way, even if the indoor temperature control is switched to the foot control and the temperature in the room reaches the vicinity of the set temperature, the air that has been heat-exchanged in the second air volume mode is irrespective of the set air volume mode. Since the air is blown into the room, the heat-exchanged and warmed air easily reaches the vicinity of the floor surface, which allows the warm air to reach the feet of the user to improve the comfort.

Here, when a predetermined condition is satisfied,
For example, the first mode in which a predetermined signal is transmitted from the remote controller and the signal is received, the second mode in which a predetermined button is turned on from the operation panel or the like, and the one-to-one mode or the second mode
In addition to the above aspect, there is a third aspect in which the temperature of the room is taken in and the temperature of the taken room is a predetermined temperature, for example, 4 [° C.] or lower than the set temperature of the set room temperature.

According to a second aspect of the present invention, any one of a plurality of air volume modes including a first air volume mode and a second air volume mode having a larger air volume per unit time than the first air volume mode is set. The indoor air is supplied to the heat exchanger with the air volume of, and the conditioned air that has been heat-exchanged by this heat exchanger is blown into the room in any one of a plurality of wind directions, including the most downward direction, and the temperature of the room is increased. In the air conditioning method of the air conditioner for controlling the temperature to a set temperature, when a predetermined condition is satisfied, it is the second air volume mode regardless of the set air volume mode and the most regardless of the set wind direction. It is characterized in that the temperature of a heat exchanger that exchanges heat with the air in the room is detected while the conditioned air is blown downward, and the detected temperature is controlled within a predetermined range.

Comparing the invention according to claim 1 with the invention according to claim 2, the invention according to claim 2 is heat-exchanged to a set wind direction out of a plurality of wind directions including the most downward direction. It is possible to ventilate the indoor air, and when the predetermined conditions are met, the most downwardly-exchanged air is ventilated regardless of the set wind direction. The difference is that they are added.

In this way, when the predetermined condition is satisfied,
Regardless of the set wind direction, the air that has undergone the most downward heat exchange is blown into the room, so the warm air that has undergone heat exchange arrives and comfort is improved.

According to a third aspect of the present invention, any one of a plurality of air volume modes including a first air volume mode and a second air volume mode having a larger air volume per unit time than the first air volume mode is set. The indoor air is supplied to the heat exchanger with the air volume of, and the conditioned air that has been heat-exchanged by this heat exchanger is blown into the room in any one of a plurality of wind directions, including the most downward direction, and the temperature of the room is increased. In the air conditioning method of the air conditioner for controlling the temperature to a set temperature, when a predetermined condition is satisfied, it is the second air volume mode regardless of the set air volume mode and the most regardless of the set wind direction. The temperature of the heat exchanger that exchanges heat with the air in the room is detected while blowing the conditioned air downward, and the detected temperature is controlled within a predetermined range, and the lowest air direction. Other than down When incorporating the change instruction signal to change direction, so that for blowing air which is the heat exchanger to the other wind direction chamber into the room.

Comparing the invention according to claim 2 with the invention according to claim 3, the invention according to claim 3 indicates that the change instruction for changing the most downward wind direction to another wind direction other than the downward wind direction. The difference is that when a signal is taken in, that is, when the change instruction signal is input or received, the heat-exchanged air is blown to another wind direction in the room.

By the way, if the foot control is continued, the temperature in the room may rise above the set temperature, impairing the comfort of the user. Therefore, the temperature in the room is detected, and the detected temperature in the room is higher than the set temperature by a predetermined temperature, for example, 3
When [° C] rises, it is possible to switch to indoor temperature control, or for a predetermined time from when the predetermined condition is satisfied, for example,
The room temperature control may be switched to after one hour, two hours, or the like. As a result, it is possible to reduce the loss of comfort.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings.

As shown in FIG. 1, the air conditioner according to the present embodiment (hereinafter referred to as "air conditioner 10") includes an indoor unit 1
2 and the outdoor unit 14, and between the indoor unit 12 and the outdoor unit 14 is a thick pipe (diameter 9.52 [mm]) refrigerant pipe 15A for circulating the refrigerant.
And a thin pipe (diameter 6.35 [mm]) of the refrigerant pipe 15B are provided, and one end of each is connected to the heat exchanger 16 in the indoor unit 12.

On the other hand, in the outdoor unit 14, the other end of one refrigerant pipe 15A is connected to the valve 18. The valve 18 is connected to a four-way valve 22 via a muffler 20A. In addition, the four-way valve 22 is connected to both sides of a pipe line to which the accumulator 24, the compressor 26 and the muffler 20B are connected, and is further connected to one of the heat exchangers 28. In addition, the other side of the heat exchanger 28 is
The other end of the refrigerant pipe 15B is connected via a heating capillary tube 30, a strainer 32, and a valve 34.

As a result, a closed refrigerant circulation path, that is, a refrigerating cycle is formed between the indoor unit 12 and the outdoor unit 14, and the operation mode is changed to the cooling mode (defrosting (drying) by switching the four-way valve 22. )mode)
Alternatively, it is switched to the heating mode. Note that FIG. 1 shows the flow of the refrigerant in each operation mode.

FIG. 2 shows a schematic structure of an electric circuit in the indoor unit 12, and FIG. 3 shows a schematic structure of an electric circuit in the outdoor unit 14.

As shown in FIG. 2, the indoor unit 12
A power supply board 38, a control board 40, and a power relay board 60A are provided in the. AC power for operating the air conditioner 10 is supplied to the power supply board 38, and a motor power supply 46 for outputting power for driving various motors in the indoor unit 12 and power for a control circuit are output. A control circuit power supply 48, a serial circuit power supply 50 that outputs electric power for the serial circuit, and a fan motor 42 (DC brushless motor, also see FIG. 1) that drives a crossflow fan that blows temperature-controlled air toward the room. A drive circuit 44 for driving is provided. The power relay board 60A is provided with a power relay 60 for opening and closing a contact 58 of a power supply circuit to the outdoor unit 14 and a temperature fuse.

The control board 40 has a serial circuit 5
2, a drive circuit 54 for driving the upper and lower flap motors 62 for adjusting the wind direction, and a serial circuit 52, a drive circuit 44,
A microcomputer (microcomputer) 56 for controlling the operation of the air conditioner 10 is connected to the driving circuit 54, and a power relay 60 is connected to the drive circuit 54 via a temperature fuse.

The drive circuit 44 changes the DC voltage supplied from the motor power source according to the signal from the microcomputer 56, and adjusts the rotation speed of the fan motor 42, that is, the amount of air blown from the indoor unit 12 by the cross flow fan. ing. For example, the supply voltage to the fan motor 42 is 12V
By changing it in 256 steps in the range of up to 36 V, it is possible to finely adjust the air flow rate. At this time, the microcomputer 56 controls the upper and lower flap motors 62 as necessary to control not only the air volume from the indoor unit 12 but also the wind direction.

Further, the microcomputer 56 displays the operating state and the operation mode of the air conditioner 10 by using an LED or the like, and also displays a self-diagnosis result on a display board 68 provided with a receiving circuit of a remote controller and a service person by lighting or blinking. Multiple service LEDs 118 for operation, operation changeover switch 1
22, room temperature sensor 74 for detecting room temperature and heat exchanger 1
A heat exchanger temperature sensor 76 for detecting the temperature of the refrigerant coil in 6 is connected.

As shown in FIG. 3, the outdoor unit 14
Is provided with a rectifier circuit 78 and a control board 80, and a terminal 82 provided on the 3P terminal board 14A.
A to 82C are 3P terminal boards 1 of the indoor unit 12, respectively.
2A is connected to terminals 84A to 84C (see FIG. 2) by wiring not shown, receives power supply, and communicates with the indoor unit 12 by the microcomputer 56.
A serial signal is transmitted / received in accordance with the control signal from the device, the frequency of the AC power supplied to the compressor 26 (for example, between 18 Hz and 150 Hz) is controlled, and the operation of each device is controlled.

A serial circuit 86 is provided on the control board 80, and a serial signal is transmitted to and received from the serial circuit 52 of the indoor unit 12. Further, the control board 80 has a plurality of noise filters 88A, 88B, 88 for removing noise.
C, a switching power supply 92 that supplies electric power to an inverter circuit 90 that drives the compressor 26, and a microcomputer 94
Is provided.

In the air conditioner 10, fuzzy calculation is performed from the room temperature and the set temperature, and the frequency for driving the compressor 26 output from the inverter circuit 90 is changed to change the rotation speed of the compressor 26 and adjust the cooling / heating capacity. It is supposed to do. That is, the difference between the current room temperature and the preset temperature is calculated, and the change amount of the difference per unit time is calculated. Then, the frequency of the compressor, which is previously determined by the fuzzy inference rule according to the difference and the amount of change of the difference per unit time, is fetched from the map, and the inverter circuit 9 is operated at this frequency.
Control 0.

The fuzzy control is not the only option, and the operation may be performed based on feedback control such as PID control.

The four-way valve 22 in the outdoor unit 14 is connected to the control board 80, and the four-way valve 2
The operation mode is switched by switching between the two. Further, the fan motor 96 (see also FIG. 1) of the heat exchanger 28 and the fan motor capacitor 96A are connected to the control board 80, and the microcomputer 94 of the control board 80 has an outside air temperature sensor for detecting the outside air temperature. 98A, a coil temperature sensor 98B that detects the temperature of the refrigerant coil in the heat exchanger 28, and a compressor temperature sensor 98C that detects the temperature of the compressor 26.
Is connected, while operating the fan motor 96, detecting the operating state of the compressor 26 and the outside air temperature,
The compressor 26 is driven.

Next, the operation of this embodiment will be described with reference to the flow chart showing the control routine (see FIG. 4).

This routine is performed by setting the temperature Tm (for example, 2
8 [℃]) and after starting the operation in the heating mode to perform the heating operation to reach the set temperature Tm, the remote controller sends an instruction or starts the operation in the set temperature Tm and the heating mode. The instruction to perform the foot heating control is transmitted from the remote controller or the like together with the instruction to perform, and the operation is started when the instruction is received. It should be noted that this routine is repeatedly executed every predetermined time.

When this routine starts, step 1
At 02, the room temperature Ti is fetched from the room temperature sensor 74, and it is judged whether or not the fetched room temperature Ti is equal to or lower than a value obtained by adding a predetermined temperature t1 (for example, 3 [° C.]) to the set temperature Tm.

Here, the time S when this routine starts
As shown in the diagram (see FIG. 5) showing the relationship between the elapsed time from 0 and the room temperature Ti (see FIG. 5), the room temperature Ti is usually lower than the set temperature Tm when the operation in the heating mode is started. Therefore,
An affirmative decision is made in step 102. In this case, in step 104, the room temperature Ti is changed from the set temperature Tm to the predetermined temperature t2.
(For example, 4 [° C.]) It is determined whether or not it is larger than the subtracted value.

Room temperature Ti is from set temperature Tm to predetermined temperature t2
If it is less than or equal to the subtracted value (time S0 to time S1),
In step 128, normal temperature control, ie room temperature T
The heat-exchanged air is blown in the set air volume mode and in the set wind direction so that i becomes the set temperature Tm,
This routine ends.

When this routine is completed and a predetermined time has elapsed, this routine is executed again and the above-described processing (steps 102, 104, 128) is executed. As a result, as shown in FIG. 6, the room temperature Ti becomes lower than the set temperature Tm.
Rise to approach.

When the room temperature Ti rises in this way and the room temperature Ti reaches the value obtained by subtracting the predetermined temperature t2 from the set temperature Tm (time S1), the determination at step 104 is affirmed, and at step 106, Step 10 of this routine
In the flag F for identifying whether or not 8 to 114 have been executed at least once, the step (10
It is determined whether or not 0 indicating that (8 to 114) has not been executed is substituted. When 0 is assigned to the flag F, the above steps (108 to 11) are executed even once.
Since 4) has not been executed, in step 108, the upper and lower flap motors 62 are driven so that the wind direction is downward, and in step 110, the air volume mode is set to the weak wind mode or lower (weak wind mode, slight wind mode). Judge whether it is set or not. If it is set to the weak wind mode or lower, the medium wind mode is set in step 112, and the process proceeds to step 114, and the medium wind mode and the strong wind mode in which the air volume per unit time is larger than that in the weak wind mode are set. If so, go to step 114. In step 114, 1 indicating that the above steps (108 to 114) have been executed at least once is assigned to the flag F, and the process proceeds to step 116. Even if the affirmative determination is made in step 106, the process proceeds to step 116.

In step 116, the coil temperature Tc of the refrigerant coil in the heat exchanger 16 is calculated from the heat exchange temperature sensor 76.
To a predetermined temperature T40 (for example, 40 [° C.]) at a predetermined temperature t3
(For example, 1.5 [° C.]) It is determined whether or not it is larger than the added value, and if the coil temperature Tc is larger than the added value of the predetermined temperature T40I and the predetermined temperature t3, step 118.
Then, in order to reduce the rotation speed of the compressor 26, the switching frequency of the inverter circuit 90 is reduced, and this routine is finished. On the other hand, if the coil temperature Tc is less than or equal to the value obtained by adding the predetermined temperature t3 to the predetermined temperature T40, step 12
0, the coil temperature Tc is from the predetermined temperature T40 to the predetermined temperature t4.
(For example, 1.5 [° C.]) It is determined whether the value is smaller than the subtracted value. If the coil temperature Tc is smaller than the value obtained by subtracting the predetermined temperature t4 from the predetermined temperature T40, step 1
At 22, the switching frequency of the inverter circuit 90 is increased in order to increase the rotation speed of the compressor 26, and this routine ends.

When the inverter circuit is controlled so that the coil temperature Tc of the refrigerant coil in the heat exchanger 16 is within a predetermined range including the predetermined temperature T40, as shown in FIG.
There is a case where the room temperature Ti rises, and finally the room temperature Ti exceeds a value obtained by adding the predetermined temperature t1 to the set temperature Tm (S2). In this case, a negative determination is made in step 102, the wind direction is switched to the initially set wind direction in step 124, the air volume mode is set to the initially set air volume mode in step 126, and the process proceeds to step 128. .

The frequency may be increased / decreased by fuzzy control as in the room temperature control. That is, if the room temperature is replaced by the coil temperature Tc and the set temperature is replaced by the set temperature T40, the room temperature control algorithm can be used as it is.

According to the present embodiment described above, when the room temperature is equal to or lower than the value obtained by adding the predetermined temperature to the set temperature and larger than the value obtained by subtracting the predetermined temperature from the set temperature, normal temperature control is not performed. , The frequency of the inverter circuit is controlled so that the coil temperature of the refrigerant coil in the heat exchanger is within a predetermined range including the predetermined temperature, and heat is exchanged downward in the medium wind mode regardless of the set air volume mode. Since the air is blown into the room, even if the room temperature reaches the vicinity of the set temperature, the air volume mode is maintained in the medium air mode, so the warm air reaches the feet and the comfort is improved.

In addition to the operation of the present embodiment described above, the timer is started when the instruction to perform the foot heating control transmitted from the remote controller or the like is received, and the predetermined time (from the time when the instruction to perform the foot heating control is received ( For example, the normal temperature control may be performed when 1 hour, 2 hours, or the like) has elapsed.

In addition to the operation of the present embodiment described above, the wind direction switched in step 108 may be changed to the wind direction designated by an instruction from a remote controller or the like.

Further, in addition to the operation of this embodiment described above, the temperature control may be performed when an instruction to cancel the foot heating control is received from a remote controller or the like.

Further, in the above-described embodiment, the air conditioner in which the route for circulating the refrigerant is changed and the heating mode and the cooling mode (dry mode) are switched has been described as an example, but the present invention is not limited to this. The present invention can also be applied to an air conditioner in which warm water is heated by a gas burner or the like in the heating mode and heat is exchanged using the warm water. In this case, the gas burner or the like is controlled so that the temperature of the portion where heat is exchanged by using hot water falls within the predetermined range.

[0049]

As described above, according to the present invention, the second air volume mode is switched regardless of the set air volume mode even when the indoor temperature control control is switched to the foot control so that the indoor temperature reaches the vicinity of the set temperature. Since the air that has been heat-exchanged with the air is blown into the room, it is easy for the air that has been heat-exchanged and warm to reach the vicinity of the floor surface, which allows warm air to reach the feet of the user and improve comfort. Have.

[0050]

[Brief description of the drawings]

FIG. 1 is a schematic view of a refrigerant pipeline of an air conditioner according to this embodiment.

FIG. 2 is a schematic configuration diagram of an electric circuit of an indoor unit.

FIG. 3 is a schematic configuration diagram of an electric circuit of an outdoor unit.

FIG. 4 is a flowchart showing a control routine of the present embodiment.

FIG. 5 is a diagram showing a relationship between an elapsed time from a time when the control routine of the present embodiment is started and room temperature.

[Explanation of symbols]

 10 Air Conditioner 12 Indoor Unit 14 Outdoor Unit 16, 28 Heat Exchanger 26 Compressor 74 Room Temperature Sensor 76 Heat Exchange Temperature Sensor 56, 94 Microcomputer 90 Inverter Circuit

Front page continuation (72) Inventor Takashi Fudo 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Kensuke Matsumoto 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd.

Claims (3)

[Claims] 1. Indoor air at an air volume of any one of a plurality of air volume modes including a first air volume mode and a second air volume mode in which the air volume per unit time is larger than that of the first air volume mode. Is supplied to the heat exchanger, and the conditioned air that has been heat-exchanged by this heat exchanger is blown into the room to control the room temperature to the set temperature. In this case, the conditioned air is blown into the room in the second air volume mode regardless of the set air volume mode, the temperature of the heat exchanger that exchanges heat with the air in the room is detected, and the detected temperature is An air conditioning method for an air conditioner, comprising controlling within a predetermined range. 2. The indoor air with an air volume of any one of a plurality of air volume modes including a first air volume mode and a second air volume mode in which the air volume per unit time is larger than that of the first air volume mode. Is supplied to the heat exchanger, and the conditioned air that has been heat-exchanged by this heat exchanger is blown into the room in any one of a plurality of wind directions including the most downward direction to bring the room temperature to the set temperature. In the air conditioning method of an air conditioner to be controlled, when a predetermined condition is satisfied, the conditioned air is in the second air volume mode regardless of the set air volume mode and is the lowest in the downward direction regardless of the set wind direction. And a temperature of a heat exchanger for exchanging heat with the air in the room are detected, and the detected temperature is controlled within a predetermined range. 3. The indoor air with an air volume of any one of a plurality of air volume modes including a first air volume mode and a second air volume mode in which the air volume per unit time is larger than that of the first air volume mode. Is supplied to the heat exchanger, and the conditioned air that has been heat-exchanged by this heat exchanger is blown into the room in any one of a plurality of wind directions including the most downward direction to bring the room temperature to the set temperature. In an air conditioning method of an air conditioner to be controlled, when a predetermined condition is satisfied, the conditioned air is in a second air volume mode regardless of the set air volume mode, and the air conditioning is at the lowest position regardless of the set wind direction. Detecting the temperature of a heat exchanger that exchanges heat with the air in the room while sending air into the room, controls the detected temperature within a predetermined range, and sets the most downward wind direction other than downward. Change finger to change to the wind direction When incorporating the signal, to blow the air which is the heat exchanger to the other wind direction chamber into the room, the air conditioning method of an air conditioner, characterized in that.