JP3451873B2 - Air conditioner - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an air conditioner.

[0002]

2. Description of the Related Art In an air conditioner equipped with a refrigerant circuit, the indoor heat exchanger can function as a condenser to heat the room. In this case, an indoor temperature sensor or the like is usually provided, and the compressor or the indoor fan is controlled based on the output of the indoor temperature sensor or the like to keep the room at a constant temperature. However, immediately after the start of the operation of the air conditioner, the user may request a comfortable heating feeling as soon as possible. Therefore, in such a case, in the conventional air conditioner, in such a case, the compression capacity of the compressor is maximized, while the rotation speed of the indoor fan is reduced to perform the immediate warming operation to minimize the blown-out air volume. It has been designed to meet the above immediate warming demand by continuously blowing hot air directly to the user while preventing the temperature from decreasing.

[0003]

However, in the above-described conventional air conditioner, when the immediate warming operation is performed for a long time in response to the immediate warming request of the user, the indoor or outdoor temperature and other conditions may occur. It is also expected that the indoor heat exchanger may overheat, or conversely, its temperature may drop and the comfort of use may be impaired. Therefore, in the above air conditioner, a timer is provided to forcibly stop the immediate warming operation when a predetermined time (for example, 30 minutes) elapses after the immediate warming operation is started. Therefore, there is a problem that the warm-up operation may be stopped immediately before the user gets a sufficient feeling of heating.

Further, in the above conventional air conditioner, in order to prevent a temperature drop in the indoor heat exchanger, the blown air volume is minimized during the immediate warming operation as described above. Then, the hot air is blown directly to the user to immediately meet the demand for warming. On the other hand, on the other hand, there is a problem that the warm air blown by the user soon rises toward the ceiling and accumulates because of the small amount of blown air, making it difficult to quickly raise the temperature of the entire room. It was

The present invention has been made in order to solve the above-mentioned conventional drawbacks, and the purpose thereof is to continue until the user obtains a sufficient feeling of heating, and further, to promptly raise the temperature of the entire room. It is to provide an air conditioner capable of immediate warming, which is also possible.

[0006]

Therefore, an air conditioner according to a first aspect of the present invention comprises an indoor heat exchanger 4 and an indoor fan 6 for pumping the conditioned air heat-exchanged by the indoor heat exchanger 4 into the room. In the air conditioner configured as described above, the control means 5 and the indoor heat exchanger temperature detecting means 13 are provided, and when there is an immediate warming request during the heating operation in which the indoor heat exchanger 4 functions as a condenser, the control means is provided. 5 forcibly sets the set room temperature to the upper limit
When the indoor heat exchanger temperature TC detected by the indoor heat exchanger temperature detection means 13 becomes higher than a predetermined first reference temperature TH1, the air volume of the indoor fan 6 is set to the temperature. Is set to be an amount of warm air immediately larger than that during normal operation, while the indoor heat exchanger temperature TC is equal to the first reference temperature T.
When it becomes lower than the second reference temperature TH2 which is set lower than H1, it is characterized by performing the immediate warming control in which the air volume of the indoor fan 6 becomes the air volume in the normal operation.

In the air conditioner according to the first aspect, the temperature T of the indoor heat exchanger 4 is provided by providing the indoor heat exchanger temperature detecting means 13.
C is being monitored. And the indoor heat exchanger temperature TC is the first
Since the air volume of the indoor fan 6 is increased when the temperature becomes higher than the reference temperature TH1, the indoor heat exchanger 4
It is possible to prevent overheating. Further, when the indoor heat exchanger temperature TC becomes lower than the second reference temperature TH2, the air volume of the indoor fan 6 is set to the air volume during normal operation, so that the indoor heat exchanger temperature TC becomes abnormal. It is possible to prevent the deterioration.

The air conditioner according to a second aspect of the present invention is the above-mentioned immediate warm air.
The air volume is larger than the maximum air volume during normal operation.
It is characterized by being.

In the air conditioner according to claim 2, the normal operation
When the indoor heat exchanger 4 is made to exert its heat exchange capacity over time,
Moreover, it becomes possible to strongly blow warm air into the room.

Further, the air conditioner of claim 3 is an indoor heat exchanger.
Exchanger 4 and conditioned air that has undergone heat exchange in this indoor heat exchanger 4
Air conditioning comprising an indoor fan 6 for pumping air into the room
In the machine, the control means 5 and the indoor heat exchanger temperature detection means 1
3 and the indoor heat exchanger 4 functions as a condenser.
When there is an immediate warming request during heating operation,
5 is the indoor heat detected by the indoor heat exchanger temperature detecting means 13.
The exchanger temperature TC is higher than the predetermined first reference temperature TH1.
When it becomes, the air volume of the indoor fan 6 is lower than that during normal operation.
Large indoor air heat exchanger temperature TC
Is a second reference temperature set lower than the first reference temperature TH1
When the temperature becomes lower than TH2, indoor fan
Immediate warming control to make the air volume of 6 the air volume during normal operation
In addition, the above immediate warm air volume is
Is larger than the maximum air volume set by the remote control
It is characterized by the air volume .

In the air conditioner according to claim 3, the indoor heat exchanger is
The temperature T of the indoor heat exchanger 4 is provided by providing the exchanger temperature detecting means 13.
C is being monitored. And the indoor heat exchanger temperature TC is the first
When the temperature becomes higher than the reference temperature TH1, the indoor fan 6
Because the air volume is increased, the indoor heat exchanger 4
It is possible to prevent overheating. Also the above indoor heat exchange
When the converter temperature TC becomes lower than the second reference temperature TH2
The air volume of the indoor fan 6 becomes the air volume during normal operation.
Therefore, the indoor heat exchanger temperature TC is abnormally low.
It is possible to prevent the fall. Besides, it is warmed immediately
The air volume is set by the remote control during normal operation.
Since the air volume is larger than the maximum air volume
When the indoor heat exchanger 4 is made to exert its heat exchange capacity over time,
Moreover, it becomes possible to strongly blow warm air into the room.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, specific embodiments of the air conditioner of the present invention will be described in detail with reference to the drawings.

FIG. 3 is a block diagram showing an embodiment of the air conditioner of the present invention. In this air conditioner, as shown in the figure, a discharge pipe 1a and a suction pipe 1b of a compressor 1 are connected to a four-way switching valve 10, and an outdoor fan 11 is arranged in parallel with this four-way switching valve 10. The outdoor heat exchanger 2, the capillary tube 3, and the indoor heat exchanger 4 are sequentially connected to the first gas pipe 19
a, first liquid pipe 19b, second liquid pipe 19c, and second gas pipe 1
They are connected in an annular shape by 9d. The indoor heat exchanger 4 is provided in the indoor unit, and the indoor unit further includes an indoor fan 6. The indoor fan 6 is driven by an induction fan motor 6a that has five taps L, LM, M, MH, and H sequentially from the low speed rotation side and is configured to be able to switch the rotation speed. 5 in the figure
Is a control unit (control means), which is configured by an integrated circuit including a function of a microcomputer. The control unit 5 inputs the output of the indoor heat exchanger temperature sensor (indoor heat exchanger temperature detecting means) 13, and controls the rotation speed switching of the fan motor 6a and the refrigerant circuit. In the figure, 9 is an accumulator provided to prevent liquid compression in the compressor 1, 7 is a liquid shutoff valve, and 8 is a gas shutoff valve, which prevent refrigerant leakage during piping work. It is provided to prevent it.

The air conditioner can perform heating operation, cooling operation, and dehumidifying operation based on commands from a remote controller (not shown). When performing the heating operation, the four-way switching valve 10 is switched in the direction of the broken line shown in FIG. 3 to allow the refrigerant to flow in order from the compressor 1 to the indoor heat exchanger 4, the capillary tube 3, and the outdoor heat exchanger 2, The indoor heat exchanger 4 functions as a condenser, and the outdoor heat exchanger 2 functions as an evaporator. In accordance with the remote control operation by the user, the connection tap of the fan motor 6a is selected from LM, M, and MH, and the indoor fan 6 is operated. Then, the amount of heat absorbed by the outdoor heat exchanger 2 is released into the room through the refrigerant,
As a result, the room temperature is raised and heating is performed. This heating operation is performed when the indoor temperature detected by an indoor temperature sensor (not shown) is lower than the set indoor temperature set by the user using a remote controller or the like. On the other hand, in the case of performing the cooling operation, the four-way switching valve 10 is switched to the solid line direction shown in the same figure, the refrigerant is circulated in the direction opposite to that in the heating operation, and the indoor heat exchanger 4 is made to function as an evaporator. At the same time, the outdoor heat exchanger 2 functions as a condenser. Also in this case, the indoor fan 6 is operated by selecting the connection tap of the fan motor 6a from LM, M, and MH according to the remote control operation by the user. Then, the amount of heat absorbed in the room is released to the outside of the room through the refrigerant to lower the temperature of the room and perform cooling. The dehumidifying operation is performed in the same manner as the cooling operation in the refrigerant circuit, and the indoor fan 6 is set to the minimum air volume.

Next, FIG. 2 is a flow chart showing a control routine executed by the control section 5. This control routine is executed when the air conditioner is operating, that is, when any one of the heating operation, the cooling operation, and the dehumidifying operation is being performed. Then, in step S1, it is determined whether or not a powerful SW provided in the remote controller (not shown) is turned on. This powerful SW is turned on when the user wants the air conditioner to operate immediately. When the powerful SW is not turned on, the routine proceeds to step S2, and the above-mentioned normal heating, cooling, and dehumidifying operations are performed, while when the powerful SW is turned on, the routine proceeds to step S3. Determine the operation mode with.

In step S3, it is determined whether the operation mode is heating operation. When not in heating operation,
When the operation mode is the heating operation while the cooling operation or the dehumidification operation is performed immediately in step S4, the operation proceeds to step S5. That is, it is determined that there is an immediate demand for warming up here. Then, in this step S5, the set indoor temperature is forcibly set to the maximum upper limit temperature, and the indoor heat exchanger temperature TC detected by the indoor heat exchanger temperature sensor 13 is immediately warmed air amount start temperature (first reference temperature). It is determined whether it is higher than TH1. And the indoor heat exchanger temperature TC is immediately the warm air flow start temperature T
If it is not higher than H1, the operation proceeds to step S6 to perform the cold air prevention operation or the normal operation. On the other hand, when the indoor heat exchanger temperature TC is higher than the immediate warm air amount start temperature TH1, the process proceeds to step S7 to perform the immediate warming operation.

Next, the immediate warm-up control by the control unit 5 will be described with reference to the time chart shown in FIG. First, it is assumed that the heating operation is turned on at time t ₀ and the indoor heat exchanger temperature TC starts to rise gradually from here. Then, at time t ₁ , the user turns on the powerful SW of the remote controller to immediately request the warming. That is, at this time t ₁ , the control by the control unit 5 proceeds to step S5 of the flowchart shown in FIG. However, since the indoor heat exchanger temperature TC has not yet reached the quick heating air volume initiation temperature TH1, but the control of the control unit 5 is always proceeding to step S6, the indoor heat exchanger at time t ₂ the temperature T
Until C reaches the normal air volume start temperature TH3, the cold air prevention operation is performed in step S6. That is, the connection tap of the fan motor 6a is set to L, and the air volume of the indoor fan 6 is set to a cold air volume that is smaller than the minimum air volume set by the remote controller during normal operation. When the At time t ₂ the indoor heat exchanger temperature TC reaches the normal air flow initiation temperature TH3, LM connection tap of the fan motor 6a according air volume setting by remote control, M, as either MH, the air volume of the indoor fan 6 remote control Perform normal operation with the set air volume.

Next, the indoor heat exchanger temperature TC reaches the warm air flow rate start temperature TH1 immediately at time t ₃ . Therefore, the control of the control unit 5 proceeds to step S7 of the flowchart shown in FIG. Then, at this time t ₃ , the connection tap of the fan motor 6a is set to H so that the air volume of the indoor fan 6 becomes an immediate warm air volume larger than the maximum air volume set by the remote controller during normal operation, and the control unit 5 has it. Activate the clock function. The hot air blowing direction at this time is the same as that during normal operation, and is, for example, downward blowing. The indoor heat exchanger temperature TC is gradually decreased by increasing the air volume of the indoor fan 6. Then, at time t ₄ , the indoor heat exchanger temperature TC becomes lower than the immediate warm air amount release temperature (TH2). However, at this time t ₄ , it is still time t ₃
Since a predetermined instant warm air flow rate maintenance time (first reference time) T1 has not elapsed since, the above immediate warm air flow rate is maintained as it is.
Then, at time t _{5 when the} immediate warm air amount maintenance time T1 has elapsed from time t ₃ , the connection tap of the fan motor 6a is set to one of LM, M, and MH according to the air amount setting by the remote controller, and the air amount of the indoor fan 6 is normally operated. Set as the remote control air volume at that time. And actuates the clock function of the control unit 5 at the same time, usually air volume maintaining time from the time t ₅ (second reference time) counting from T2 has elapsed.

By making the air volume of the indoor fan 6 smaller than the immediate warm air volume, the temperature TC of the indoor heat exchanger is maintained at time t _5.
The temperature gradually rises, and immediately at time t ₆ , the warm air volume start temperature TH1
Reach However, since from the time t ₅ still in the time t ₆ has not passed the normal air flow maintaining time T2, further maintaining the air volume of the indoor fan 6 to the remote control set air volume. Time t ₇ and the time t ₅ Normal air volume maintaining time T2 from has elapsed
In, the connection tap of the fan motor 6a is again set to H, and the air volume of the indoor fan 6 is immediately set to the warm air volume. In Figure 1,
Although the indoor heat exchanger temperature TC from the time t ₇ is somewhat reduced, thereafter it maintains the temperature higher than the quick heating air volume release temperature TH2. Therefore, the air volume of the indoor fan 6 is immediately maintained at the warm air volume until the user turns off the powerful SW of the remote controller.

In the air conditioner configured and controlled as described above, the indoor heat exchanger temperature sensor 13 detects the indoor heat exchanger temperature TC, and the indoor heat exchanger temperature TC is a predetermined immediate warm air flow start temperature. When it becomes higher than TH1, the air volume of the indoor fan 6 is set to the immediate warm air volume, while when the indoor heat exchanger temperature TC becomes lower than a predetermined instant warm air volume release temperature TH2, the air volume of the indoor fan 6 becomes normal. It is set as the remote control air volume during operation. In this way, the indoor heat exchanger 4 is overheated or the indoor heat exchanger temperature TC becomes abnormal by changing the air volume of the indoor fan 6 and performing immediate warming control while monitoring the indoor heat exchanger temperature TC. It is possible to prevent the deterioration. Therefore, it is not necessary to forcibly release the warm-up operation immediately by the timer function, etc., and the user can get a sufficient feeling of heating and turn off the powerful SW of the remote control.
The warm-up operation can be continued immediately until. Further, since the air volume of the indoor fan 6 is made larger than the maximum air volume during the normal operation to perform the warm-up operation immediately, the heat exchange capacity of the indoor heat exchanger 4 is fully exerted to effectively use the heat quantity of the refrigerant. In addition, the temperature of the entire room can be raised quickly by spreading the blown warm air to every corner of the room.

Further, in the above air conditioner, the air volume of the indoor fan 6 is set to the instant warm air volume, and then the predetermined instant warm air volume maintenance time T1 is set.
The warm air volume is maintained as it is until the time elapses. Depending on the indoor / outdoor temperature and other conditions, the indoor heat exchanger temperature TC immediately changes to the warm air volume release temperature TH2 for a short time after the user turns on the powerful SW of the remote controller.
It may be lower than the above. In such a case, if the user turns on the powerful SW and immediately returns to the warm air volume and then immediately returns to the air volume during normal operation, the user may be confused that it is a device failure. Absent. However, in the air conditioner, regardless of the indoor heat exchanger temperature TC, the immediate warm air volume is maintained as it is until the instant warm air volume maintenance time T1 elapses, so the above-mentioned error may occur to the user. Can be avoided. When the warm air volume immediately returns to the remote control air volume set during normal operation, the remote control air volume is maintained regardless of the indoor heat exchanger temperature TC until the normal air volume maintenance time T2 elapses. Therefore, it is possible to prevent hunting from occurring in the indoor fan 6, the air volume of the indoor fan 6 changes many times in a short time, and such a change causes annoying noise, which deteriorates user comfort. Can be avoided.

Although specific embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. For example, in the above, the immediate warm air volume is set to be larger than the maximum air volume during normal operation, but the immediate warm operation may be performed as an air volume that is larger than the remote control set air volume during normal operation before the start of immediate warm operation. Further, in the above, the set room temperature is forcibly set to the maximum upper limit temperature in accordance with the immediate warming request, but the excellent effect of the present invention is not necessarily obtained unless the maximum upper limit temperature is set in this way. Furthermore, in the above, the immediate warming request is generated by the remote control operation of the user. However, for example, the immediate warming request is generated based on the output value of the indoor temperature sensor,
It may be generated at the start of operation. The air conditioner includes a compressor having a fixed compression capacity that is driven at a predetermined commercial frequency, but the present invention is applied to an air conditioner that includes a compressor that is controlled to have a variable compression capacity. You can also

[0023]

According to the air conditioner of the first aspect, it is possible to prevent overheating of the indoor heat exchanger and abnormal temperature drop of the indoor heat exchanger. Therefore, it is possible to continue the warm-up operation immediately until the user gets a sufficient feeling of heating and improve the comfort of use. In addition, since the air volume of the indoor fan is increased and the warm-up operation is performed immediately, it is possible to quickly raise the temperature of the entire room. In particular, according to the second aspect , it is possible to obtain a more immediate warming effect and to increase the temperature of the entire room more quickly.

Further, in the air conditioner of claim 3 , the indoor heat exchanger is
It is possible to prevent overheating of the heat exchanger and abnormal temperature drop of the indoor heat exchanger.
It Therefore, it is necessary to warm up immediately until the user gets a sufficient feeling of heating.
It is possible to continue rolling and improve user comfort.
It In addition, the air volume of the indoor fan is increased to perform warm-up operation immediately.
Therefore, it is possible to increase the temperature of the entire room quickly.
It becomes Noh. Moreover, the above immediate warm air volume is
Air volume that is larger than the maximum air volume set by the remote control
Therefore, the heat exchange capacity higher than that during normal operation is
While exerting it on the exchanger, it blows warm air strongly into the room
It becomes possible to obtain a more immediate warming effect.
In fact, it is possible to raise the temperature of the entire room more quickly.
It becomes Noh.

[Brief description of drawings]

FIG. 1 is a time chart illustrating immediate warming control of an air conditioner of the present invention.

FIG. 2 is a flowchart showing control by a control unit of the air conditioner.

FIG. 3 is a block diagram of the air conditioner.

[Explanation of symbols]

4 Indoor heat exchanger 5 control unit 6 indoor fan 13 Indoor heat exchanger temperature sensor

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-61-173045 (JP, A) JP-A-4-86446 (JP, A) JP-A-5-141755 (JP, A) JP-A-8- 233345 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) F24F 11/02-11/08

Claims (3)

(57) [Claims] 1. An air conditioner comprising an indoor heat exchanger (4) and an indoor fan (6) for sending conditioned air, which has been heat-exchanged by the indoor heat exchanger (4), indoors. Means (5) and indoor heat exchanger temperature detection means (13) are provided, and when there is an immediate warming request during heating operation in which the indoor heat exchanger (4) functions as a condenser, the control means (5) is provided. ) Forcibly sets the set room temperature to the maximum upper limit temperature
The control means (5), when the indoor heat exchanger temperature (TC) detected by the indoor heat exchanger temperature detection means (13) becomes higher than the predetermined first reference temperature (TH1),
The air volume of the indoor fan (6) is set to a larger immediate warm air volume than during normal operation, while the indoor heat exchanger temperature (TC) is set lower than the first reference temperature (TH1) to a second reference temperature (TH2). The air conditioner is characterized by performing immediate warming control in which the air flow rate of the indoor fan (6) is set to the air flow rate during normal operation when the air flow rate becomes even lower than that of (1). 2. The immediate warm air volume is the maximum during normal operation.
Claims characterized in that the air volume is larger than the large air volume.
1 air conditioner. 3. An indoor heat exchanger (4) and this indoor heat exchanger
A room where the conditioned air that has undergone heat exchange in the device (4) is pumped into the room
Control in an air conditioner comprising a fan (6)
Means (5) and indoor heat exchanger temperature detection means (13) are provided.
In this case, the indoor heat exchanger (4) functions as a condenser.
When there is a demand for immediate warming during the operation of the cell, the above control means
(5) is detected by the indoor heat exchanger temperature detection means (13)
The indoor heat exchanger temperature (TC) is the predetermined first reference temperature (T
When it becomes higher than H1), the wind of the indoor fan (6)
The amount of warm air is immediately larger than that during normal operation.
The indoor heat exchanger temperature (TC) is the first reference temperature (TH
Than the second reference temperature (TH2) set lower than 1)
When it becomes lower, the air volume of the indoor fan (6) is reduced.
It is configured and configured to perform immediate warm-up control with the air volume during normal operation.
In addition, the above immediate warm air volume is
An air conditioner having an air volume that is larger than the maximum air volume set by the air conditioner.