JPH0336448A - Air conditioner - Google Patents

Abstract

PURPOSE:To diminish noise for improving amenity by reducing the rotating speed of an outdoor fan or a compressor when the noise level detected by a noise sensor provided on the outdoor side exceeds the set noise level. CONSTITUTION:In cooling or heating operation, various kinds of noise are generated from an outdoor apparatus and detected by a noise sensor 13. The noise levels detected by the noise sensor 13 are compared with the set noise level Ns one by one, and when the detected noise level exceeds the set noise level, a driving voltage of a fan motor 6M is reduced by a certain level. When the driving voltage of the fan motor 6M drops, the rotating speed of an outdoor fan 6 is reduced and the noise generated by the outdoor fan 6 is diminished.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) This invention relates to a compressor, an outdoor heat exchanger, and a pressure reducer.

The present invention relates to an air conditioner equipped with a refrigeration cycle formed by sequentially communicating indoor heat exchangers.

(Prior Art) In general, it is desired that air conditioners not only provide comfortable air conditioning such as cooling and heating, but also be able to harmonize well with the environment in which they are installed in various aspects such as shape and usability.

(Problems to be Solved by the Invention) However, the reality is that countermeasures against noise generated from air conditioners are still insufficient, and there is still room for improvement in this regard.

That is, there is not much of a problem when the load is light and the temperature difference between indoors and outdoors is small, but as the load increases, the noise generated from the fan and compressor also increases, causing discomfort to residents.

To deal with this, it may be possible to limit the rotational speed of the fan or compressor to a predetermined value or less, but if this is done, the necessary air conditioning capacity may not be obtained.

In addition, noise includes not only the direct sound from outdoor fans and compressors, but also the vibration noise caused by the vibrations of outdoor fans and compressors being transmitted to walls, etc., and the reality is that countermeasures against these noises are difficult.

This invention has been made in view of the above circumstances, and in any of the air conditioners of claims 1, 2, 3, and 4, when the noise reaches an unacceptable level, The purpose is to reduce noise regardless of its type and improve comfort.

[Structure of the Invention] (Means for Solving the Problem) The air conditioner of claim 1 is an indoor fan that circulates air, which is formed by sequentially communicating a compressor, an outdoor heat exchanger, a pressure reducer, and an indoor heat exchanger. Then, the rotation speed of the outdoor fan or compressor is determined according to the comparison result between a sound sensor provided on the outside of the room, a sound sensor provided that stores the detected sound level of the sound sensor, and a set sound level, and this storage means. and control means for controlling.

The air conditioner according to claim 2 includes: an indoor fan for circulating cool air formed by sequentially communicating a compressor, an outdoor heat exchanger, a pressure reducer, and an indoor heat exchanger; a sound sensor provided on the outdoor side; a sound sensor provided that corrects the sound level detected by the sound sensor and stores it as a set sound level stored in the fan, a detector novel of the sound sensor before the start of operation, and a set sound level stored in the storage means; and control means for controlling the rotation speed of the outdoor fan or the compressor according to the comparison result of the storage means.

The air conditioner according to claim 3 includes: an indoor fan that circulates cold air by sequentially communicating a compressor, an outdoor heat exchanger, a pressure reducer, and an indoor heat exchanger; a sound sensor provided on the indoor side; and the sound sensor. The outdoor fan and the indoor fan according to the comparison result of the provided sound sensor and this storage means, which stores the detected sound level and the set sound level.

Or a control means for controlling the rotation speed of the compressor.

An air conditioner according to a fourth aspect of the present invention includes: an indoor fan for circulating cool air formed by sequentially communicating a compressor, an outdoor heat exchanger, a pressure reducer, and an indoor heat exchanger; A sound sensor provided on the indoor side, a sound level detected by the sound sensor before the start of operation is corrected, and the sound level detected by the sound sensor before the start of operation is corrected, and a sound level detected by the sound sensor before the start of operation and a set sound stored in the storage means are A sound sensor is provided to store the sound level as a level, and a control means for controlling the rotation speed of the outdoor fan, the indoor fan, or the compressor according to the comparison result of the storage means.

(Function) In the air conditioner of claim 1, when the detected sound level of the sound sensor provided on the outdoor side exceeds a set sound level, the air conditioner of claim 2 is characterized in that the rotation speed of the outdoor fan or the compressor is changed. , Before the start of operation, the sound level detected by the sound sensor installed outside the room is corrected and stored as the set sound level.

The air conditioner according to claim 3, wherein during operation, when the sound level detected by the sound sensor exceeds a memorized set sound level, the number of rotations of the outdoor fan or the compressor is changed. When the sound level detected by the sound sensor exceeds the set sound level, the outdoor fan,
In the air conditioner according to claim 4, which is characterized by the number of rotations of an indoor fan or a compressor, before the start of operation, the detected sound level of a sound sensor provided outside the room is corrected, and the corrected sound level is stored as a set sound level. . During operation, when the sound level detected by the sound sensor exceeds the stored set sound level, the rotational speed of the outdoor fan, indoor fan, or compressor is reduced.

(Example) Hereinafter, a first example of the present invention will be described with reference to the drawings. This first embodiment corresponds to the air conditioner of claim 1.

'In Fig. 1, 1 is a compressor, and a four-way valve 2, an outdoor heat exchanger 3, a pressure reducer such as an expansion valve 4, and an indoor heat exchanger 5 are successively connected to the compressor 1 to form a heat pump type refrigeration cycle. are doing.

That is, during cooling operation, the refrigerant flows in the direction of the solid arrow shown in the figure, and the outdoor heat exchanger 3 acts as a condenser and the indoor heat exchanger 5 acts as an evaporator. During heating operation, the four-way valve 2 is switched to flow the refrigerant in the direction of the dashed arrow in the figure, and the indoor heat exchanger 5
is used as a condenser, and the outdoor heat exchanger 3 is used as an evaporator.

An outdoor fan 6 is provided near the outdoor heat exchanger 3 to circulate outdoor air through the outdoor heat exchanger 3.

An indoor fan 7 is provided near the indoor heat exchanger 5 to circulate indoor air through the indoor heat exchanger 5.

Further, numeral 10 denotes a control section that performs overall control of the air conditioner, and is composed of a microcomputer and its peripheral circuits. The compressor 1, four-way valve 2, fan motors 6M, 7M, remote control light receiving section 11, and sensor circuit 12 are connected to this control section 10.

A sound sensor 13 is connected to the sensor circuit 12 .

Here, the remote control light receiving section 11 is used for remote control operation! Transmission signal (optical signal) from (not shown)
, and provides the received data to the control unit 10.

The sensor circuit 12 performs signal processing such as amplification on the output signal of the sound sensor 13 and provides the result to the control unit 10 as detected sound data.

As the sound sensor 13, a sensor that converts sound pressure into an electrical signal, such as a microphone, or a sensor that converts sound pressure into an optical signal, such as an optical microphone, can be used.

Then, the control unit 10 controls the rotation speed of the outdoor fan 6 according to the comparison result between the sound sensor 13, which is detected by the sound sensor 13, and the sound sensor, which is stored as a predetermined set level Ns, and this storage means. and control means for controlling.

On the other hand, the outdoor unit is shown in FIG.

An outdoor unit 20 is equipped with the compressor 1, a four-way valve 2, an outdoor heat exchanger 3, an expansion valve 4, an outdoor fan 6, a sound sensor 13, and the like. This outdoor unit 20 has a wire guard 21 covering the intake holes on the entire surface, and a connecting pipe 22 from the lower side of the side to the indoor unit (not shown).
is derived.

The crossover pipe 22 is connected to the refrigerant pipe 23.2 as shown in FIG.
4 is covered with a heat insulating material 25, and the heat insulating material 25 and the electrical wiring 26 are covered with a tape 27.

Here, the internal configuration of the outdoor unit 20 is shown in FIGS. 4 and 5.

The interior of the casing of the outdoor unit 20 is divided into an air chamber 32 and a component chamber 33 by a partition plate 31. Air chamber 3
2 is provided with an outdoor heat exchanger 3 and an outdoor fan 6. The compressor 1 and the electrical parts box 34 are provided in the parts chamber 33, and the refrigerant pipes 23, 24 are led out through packed valves 35, 35.

The electrical component box 34 houses the control section 10 described above.

The upper air sound sensor 13 is attached to the surface of the partition plate 31 located on the air chamber 32 side.

Next, the operation of the above configuration will be explained with reference to FIG. 6.

When a remote control type operating device is used to start a cooling operation, the compressor 1 is turned on and a cooling cycle is formed. Then, the outdoor fan 6 is turned on, and outdoor air circulates through the outdoor heat exchanger 3. Further, the indoor fan 7 is turned on, and indoor air is circulated through the indoor heat exchanger 5.

As a result, cold air is blown into the room.

Further, when a heating operation is started using a remote control operating device, the compressor 1 is turned on, the four-way valve 2 is switched, and a heating cycle is formed.

Then, the outdoor fan 6 is turned on, and outdoor air circulates through the outdoor heat exchanger 3. Further, the indoor fan 7 is turned on, and indoor air is circulated through the indoor heat exchanger 5. As a result, warm air is blown into the room.

Various sounds are generated in the outdoor unit 20 before the start of operation, and these sounds are detected by the sound sensor 13.

The control unit 10 successively compares the detected sound level (noise level) N of the sound sensor 13 and the setter level Ns, and when the detected sound level N exceeds the setter level Ns (NaN8), drives the fan motor 6M. Reduce the voltage to a specified level.

When the drive voltage to the fan motor 6M decreases, the rotation speed of the outdoor fan 6 is reduced, and the noise generated from the outdoor fan 6 is reduced.

Here, when considering the noise of the air conditioner outdoors, as shown in FIG. 7, the overall sound consists of the sound of the outdoor fan and the sound other than the outdoor fan.

The main sound other than this outdoor fan is the sound of the compressor.

Therefore, by reducing the sound of the outdoor fan 6 as described above, the noise can be suppressed within an allowable range, and it is comfortable not only for the resident in question but also for the resident in the neighboring house.

In addition, noise is not only the sound emitted directly from the outdoor fan 6 and compressor 1, but also the vibration sound emitted when the vibrations of the outdoor fan 6 and compressor 1 are transmitted to walls, etc.; It can be detected by the sensor 13 and thus the noise can be reduced regardless of its type.

In the above embodiment, the detected sound level N of the sound sensor 13 is
When exceeds the setter level Ns (NaNs),
Although the rotation speed of the outdoor fan 6 is reduced, as shown in FIG. 8, the driving voltage to the compressor 1 may be lowered to reduce the rotation speed of the compressor 1.

If the compressor 1 is of variable capacity type, the output frequency (also referred to as operating frequency) of the inverter circuit may be lowered to reduce the rotation speed of the compressor 1. Moreover, both the rotation speed of the outdoor fan 6 and the rotation speed of the compressor 1 may be reduced.

Also, regarding the mounting position of the sound sensor 13, please refer to the partition plate 3.
It is not limited to the position shown in FIG.

That is, the surface b1 located on the parts chamber 33 side of the partition plate 31; the inside of the electrical component box 34; the outer peripheral surface d1 located on the air chamber 32 side of the electrical component box 34; the side wall e1 of the compressor 1; the front surface of the outdoor heat exchanger 3; f1 Upper part h of outdoor heat exchanger 3
1 Below the outdoor fan 6 1, on the front outside of the casing of the outdoor unit 20 j 1 On the back outside of the casing of the outdoor unit 20 j-1 On the inside of the back of the casing of the outdoor unit 20 m1 wire, inside of guard 21 n1 base part of fan monitor 6M o1 inside of cap part of wire guard 21 p1 position away from outdoor unit 20 q1 outer circumference of tape of crossover piping 22 r1 outside part of packed pulp 35 s1 of packed valve 35 It may be attached at any position, such as on the inner part t.

Next, a second embodiment of the invention will be described.

This second embodiment corresponds to the air conditioner of claim 2.

In this case, the control unit 10 includes a storage means for correcting the sound level N detected by the sound sensor 13 before the start of power-on before the start of operation, and storing the result of the calculation as the setter level Ns;
A sound sensor installed to store the sound level N detected by the sound sensor 13 before the start of operation and the setter level Ns stored above;
A control means for controlling the rotation speed of the outdoor fan 6 according to the comparison result of the storage means is provided.

The other configurations are the same as in the first embodiment.

The operation of such a configuration will be explained with reference to FIG. 9.

When the power is turned on, the control unit 10 takes in the detected sound level (noise level) N of the sound sensor 13, adds or subtracts a correction value α to the detected sound level N, and internally uses this calculation result as the setter level Ns. Store in memory.

When the operation starts, the control unit 1o sets the detected sound level N of the sound sensor 13 and the setter level N stored in the internal memory.
s and the detected sound level N is the setter level Ns.
(N≧Ns), the drive voltage to the fan motor 6M is lowered to a predetermined level.

When the drive voltage to the fan motor 6M decreases, the rotation speed of the outdoor fan 6 is reduced, and the noise generated from the outdoor fan 6 is reduced.

By reducing the sound of the outdoor fan 6 in this way, the noise can be suppressed within an allowable range, and it is comfortable not only for the resident but also for the residents of the neighboring house.

In addition, noise is not only the sound emitted directly from the outdoor fan 6 and compressor 1, but also the vibration sound emitted when the vibrations of the outdoor fan 6 and compressor 1 are transmitted to walls, etc.; It can be detected by the sensor 13 and thus the noise can be reduced regardless of its type.

In particular, since the setter level Ns is determined based on the surrounding environmental sounds before the start of operation, optimal control that matches changes in the environment is possible.

For example, there is a difference in the level of noise perceived by residents during the day and night, and even if the sound level is high during the day, it is normal for residents not to perceive it as noisy, and it is difficult to adequately follow such environmental changes. can.

In this embodiment, when the detected sound level N exceeds the setter level Ns, the rotation speed of the outdoor fan 6 is reduced, but the drive voltage to the compressor 1 is lowered and the rotation speed of the compressor 1 is reduced. You may also do so.

If the compressor 1 is of variable capacity type, the output frequency (also referred to as operating frequency) of the inverter circuit may be lowered to reduce the rotation speed of the compressor 1. Moreover, both the rotation speed of the outdoor fan 6 and the rotation speed of the compressor 1 may be reduced.

A third embodiment of this invention will be described. This embodiment corresponds to the air conditioner of claim 3.

First, the configuration of the refrigeration cycle and its surroundings is the same as that in FIG. 1, but the sound sensor 13 is provided in the indoor unit shown in FIGS. 10 and 11 in the first and second embodiments. It is different from the example.

Reference numeral 40 denotes an indoor unit, which has a suction grill 41, an outlet grill 42, a display panel 43, and a remote control light receiving section 11 on its entire surface.

45 is a remote control operation device.

A heat insulating material 46 is provided inside the outdoor unit 40, and a ventilation path 47 is formed from the intake grill 41 to the outlet grill 42.

In this ventilation path 47, an air purifier 48 and an indoor heat exchanger 5 are sequentially arranged toward the suction grille 41, and an indoor fan 7 is arranged near the outlet grille 42. Also,
The blowout grille 42 is provided with a blowout louver 49.

A sound sensor 13 is attached to the remote control light receiving section 11.

On the other hand, the control unit 10 controls the rotation speed of the indoor fan 7 according to the comparison result between the sound level N detected by the sound sensor 13 and the sound sensor provided, which is stored as a predetermined setter level Ns, and this storage means. and control means for controlling.

Next, the operation of the above configuration will be explained with reference to FIG. 12.

When the operation controller 45 is used to start the cooling operation, the compressor 1 is turned on and a cooling cycle is formed. Then, the outdoor fan 6 is turned on, and outdoor air circulates through the outdoor heat exchanger 3. Further, the indoor fan 7 is turned on, and indoor air is circulated through the indoor heat exchanger 5. As a result, cold air is blown into the room.

Furthermore, when a heating operation is started using the operation controller 45, the compressor 1 is turned on, the four-way valve 2 is switched, and a heating cycle is formed.

Then, the outdoor fan 6 is turned on, and outdoor air circulates through the outdoor heat exchanger 3. Further, the indoor fan 7 is turned on, and indoor air is circulated through the indoor heat exchanger 5. As a result, warm air is blown into the room.

Various sounds are generated in the indoor unit 40 before the start of operation, and these sounds are detected by the sound sensor 13.

The control unit 10 successively compares the detected sound level (noise level) N of the sound sensor 13 and the setter level Ns, and when the detected sound level N exceeds the setter level Ns (NaNs), drives the fan motor 7M. Reduce the voltage to a specified level.

When the drive voltage to the fan motor 7M decreases, the rotation speed of the indoor fan 7 is reduced, and the noise generated from the indoor fan 7 is reduced.

By reducing the sound of the indoor fan 7 in this way, the noise can be suppressed within an allowable range, which is comfortable for the residents.

In addition, the noise is not only the sound directly emitted from the indoor fan 7, but also the vibration sound emitted when the vibration of the indoor fan 7 is transmitted to walls, etc.;
3 can be detected and therefore the noise can be reduced regardless of its type.

In the above embodiment, the detected sound level N of the sound sensor 13 is
exceeded the setter level Ns (NkNs), the rotation speed of the indoor fan 7 was reduced, but as shown in FIG. You may also do so.

If the compressor 1 is of variable capacity type, the output frequency (also referred to as operating frequency) of the inverter circuit may be lowered to reduce the rotation speed of the compressor 1. Further, the rotation speed of the outdoor fan 6 may be reduced.

Furthermore, an indoor fan 7, a compressor 1. A plurality of rotation speeds of the outdoor fan 6 may be reduced.

Furthermore, the mounting position of the sound sensor 13 is not limited to the remote control light receiving section 11;
It may be installed in any position shown by the arrow in Figure 1.

That is, the lower part a1 of the outlet grille 42, the upper part of the outlet grille 42, the inside c1 of the operation controller 45, the entire surface d1 of the indoor heat exchanger 5, the entire upper part e of the casing of the indoor unit 40, and the heat insulating material 4.
It may be attached to any position such as the upper surface h1 of the housing of the indoor unit 40, the left side 11 of the outlet grille 42, and the right side j of the outlet grille 42.

A fourth embodiment of this invention will be described. This fourth embodiment corresponds to the air conditioner of claim 4.

In this case, the control unit 10 includes a storage means for correcting the sound level N detected by the sound sensor 13 before the start of power-on before the start of operation, and storing the result of the calculation as the setter level Ns;
A sound sensor installed to store the sound level N detected by the sound sensor 13 before the start of operation and the setter level Ns stored above;
A control means for controlling the rotation speed of the indoor fan 7 according to the comparison result of the storage means is provided.

The other configurations are the same as the jl13 embodiment.

The operation of this configuration will be explained with reference to FIG. 14.

When the power is turned on, the control unit 10 takes in the detected sound level (noise level) N of the sound sensor 13, adds or subtracts a correction value α to the detected sound level N, and internally uses this calculation result as the pre-setting level Ns. Store in memory.

When the operation starts, the control unit 10 sets the detected sound level N of the sound sensor 13 and the pre-setting level N stored in the internal memory.
s and the detected sound level N is the pre-setting level Ns.
(NaNs), the drive voltage to the fan motor 7M is lowered to a predetermined level.

When the drive voltage to the fan motor 7M decreases, the rotation speed of the indoor fan 7 is reduced, and the noise generated from the indoor fan 7 is reduced.

By reducing the sound of the indoor fan 7 in this way, the noise can be suppressed within an allowable range, which is comfortable for the residents.

In addition, the noise is not only the sound directly emitted from the indoor fan 7, but also the vibration sound emitted when the vibration of the indoor fan 7 is transmitted to walls, etc.;
3 can be detected and therefore the noise can be reduced regardless of its type.

In particular, since the pre-setting level Ns is determined based on the indoor environmental sound before the start of operation, optimal control that matches changes in the environment is possible.

For example, there is a difference in the level of noise perceived by residents during the day and night, and even if the sound level is high during the day, it is normal for residents not to perceive it as noisy, and it is difficult to adequately follow such environmental changes. can.

Note that in this embodiment, when the detected sound level N exceeds the pre-setting level Ns, the rotation speed of the indoor fan 7 is reduced, but the drive voltage to the compressor 1 is lowered and the rotation speed of the compressor 1 is reduced. You may also do so.

If the compressor 1 is of variable capacity type, the output frequency (also referred to as operating frequency) of the inverter circuit may be lowered to reduce the rotation speed of the compressor 1. Further, the rotation speed of the outdoor fan 6 may be reduced.

Furthermore, an indoor fan 7, a compressor 1. A plurality of rotation speeds of the outdoor fan 6 may be reduced.

Here, when measuring the level of noise transmitted to a predetermined position q in the room under the usage conditions shown in FIG. 15, the data shown in FIG. 16 was obtained.

■ is the noise caused by the indoor fan 7, ■ is the vibration sound of the indoor unit 40, ■ is the noise from the wall based on the vibration of the indoor unit 40, ■ is the vibration sound of the outdoor unit 20, ■ is the noise caused by the outdoor fan 6, ■ is the noise caused by the compressor 1, and ■ is the overall synthetic noise.

This shows that by reducing the sound of at least one of the outdoor fan 6, the indoor fan 7, and the compressor 1, the level of noise transmitted to the residents can be reduced.

[Effects of the Invention] As described above, according to the present invention, the air conditioner of claim 1 circulates cold air formed by sequentially communicating a compressor, an outdoor heat exchanger, a pressure reducer, and an indoor heat exchanger. The rotation of the outdoor fan or compressor is determined based on the comparison result between the indoor fan ε, the sound sensor installed on the outside of the room, the installed sound sensor that stores the detected sound level of this sound sensor and the set sound level, and this storage means. Since the present invention includes a control means for controlling the number of noises, if the noise reaches an unacceptable level, the noise can be reduced regardless of the type, and comfort can be improved.

The air conditioner according to claim 2 includes: an indoor fan for circulating cool air formed by sequentially communicating a compressor, an outdoor heat exchanger, a pressure reducer, and an indoor heat exchanger; a sound sensor provided on the outdoor side; a sound sensor provided for correcting the sound level detected by the sound sensor of the fan and storing it as a sound level detected by the sound sensor before the start of operation and a set sound level stored in the storage means; and a control means for controlling the rotation speed of the outdoor fan or the compressor according to the comparison result of the means, so that when the noise reaches an unacceptable level, the noise can be reduced regardless of the type, Comfort can be improved.

I can figure it out.

An air conditioner according to a third aspect of the present invention includes: an indoor fan for circulating cool air formed by sequentially communicating a compressor, an outdoor heat exchanger, a pressure reducer, and an indoor heat exchanger; a sound sensor provided on the indoor side; and the sound sensor. The outdoor fan and the indoor fan according to the comparison result of the provided sound sensor and this storage means, which stores the detected sound level and the set sound level.

Alternatively, since the compressor is provided with a control means for controlling the rotation speed of the compressor, when the noise reaches an unacceptable level, the noise can be reduced regardless of the type, and comfort can be improved.

The air conditioner according to claim 4 includes a refrigeration cycle in which a compressor, an outdoor heat exchanger, a pressure reducer, and an indoor heat exchanger are connected in sequence;
an indoor fan that circulates outdoor air to the outdoor heat exchanger; a sound sensor installed on the indoor side; The output of the outdoor fan, indoor fan, or compressor is determined according to the comparison result between the sound sensor detected by the sound sensor, the set sound stored in the storage means, and the sound sensor stored as one novel. Since the motor is equipped with a control means for controlling the rotation speed, when the noise reaches an unacceptable level, the noise can be reduced regardless of the type, and comfort can be improved.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of the refrigeration cycle and its peripheral parts in the first to fourth embodiments of the present invention, FIG. 2 is an external perspective view of the outdoor unit of the first embodiment and the second embodiment, FIG. 3 is a cross-sectional view of the configuration of the crossover piping in FIG. 2, FIGS. 4 and 5 are views each showing the internal configuration of FIG. 2, and FIG. 6 explains the operation of the first embodiment. FIG. 7 is a flowchart for explaining the noise level in the same embodiment, FIG. 8 is a flowchart for explaining the operation of a modified example of the same embodiment, and FIG. 9 is a diagram for explaining the operation of a modified example of the same embodiment. The flowchart for explaining the action, Figure 10 is '
11 is a diagram showing the internal configuration of FIG. 10, FIG. 12 is a flowchart for explaining the operation of the third embodiment,
FIG. 13 is a flowchart for explaining the operation of a modified example of the same embodiment, FIG. 14 is a flowchart for explaining the operation of the fourth embodiment, and FIGS. 15 and 16 are for the third embodiment and FIG. It is a figure which shows the measurement data of the noise level concerning 4th Example. 1...Compressor, 3...Outdoor heat exchanger, 5...Indoor heat exchanger, 6...Outdoor fan, 7...Indoor fan,
DESCRIPTION OF SYMBOLS 10... Control part, 13... Sound sensor, 20... Outdoor unit, 40... Indoor unit.

Claims (4)

[Claims] (1) A refrigeration cycle that sequentially connects a compressor, an outdoor heat exchanger, a pressure reducer, and an indoor heat exchanger, an outdoor fan that circulates outdoor air to the outdoor heat exchanger, and an indoor heat exchanger that circulates outdoor air to the indoor heat exchanger. An indoor fan that circulates air, a sound sensor installed outside the room, a comparison means that compares the sound level detected by the sound sensor and a set sound level, and a comparison between the outdoor fan or the compressor according to the comparison result of the comparison means. An air conditioner characterized by comprising a control means for controlling the number of rotations of the air conditioner. (2) A refrigeration cycle in which a compressor, an outdoor heat exchanger, a pressure reducer, and an indoor heat exchanger are connected in sequence, an outdoor fan that circulates outdoor air to the outdoor heat exchanger, and an indoor heat exchanger to the indoor heat exchanger. an indoor fan that circulates air; a sound sensor installed outside the room; a storage device that corrects the sound level detected by the sound sensor before the start of operation and stores it as a set sound level; Comparing means for comparing the detected sound level and the set sound level stored in the storage means;
An air conditioner characterized by comprising: control means for controlling the rotation speed of the outdoor fan or the compressor according to the comparison result of the comparison means. (3) A refrigeration cycle in which a compressor, an outdoor heat exchanger, a pressure reducer, and an indoor heat exchanger are connected in sequence, an outdoor fan that circulates outdoor air to the outdoor heat exchanger, and an indoor heat exchanger to the indoor heat exchanger. An indoor fan that circulates air; a sound sensor installed indoors; a comparison means that compares the sound level detected by the sound sensor with a set sound level; An air conditioner characterized by comprising a fan or a control means for controlling the rotation speed of a compressor. (4) A refrigeration cycle in which a compressor, an outdoor heat exchanger, a pressure reducer, and an indoor heat exchanger are connected in sequence, an outdoor fan that circulates outdoor air to the outdoor heat exchanger, and an indoor heat exchanger to the indoor heat exchanger. an indoor fan that circulates air; a sound sensor provided on the indoor side; a storage means that corrects the sound level detected by the sound sensor before the start of operation and stores it as a set sound level; Comparing means for comparing the detected sound level and the set sound level stored in the storage means;
An air conditioner characterized by comprising: a control means for controlling the rotation speed of the outdoor fan, the indoor fan, or the compressor according to the comparison result of the comparison means.