JP2001248877A - Air conditioner and controlling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide and air conditioner and controlling method in which power saving is realized by reducing waiting time power consumption. SOLUTION: An air conditioner comprising means 7 for preheating refrigerating machine oil in a compressor 6 is provided, as one operation control mode, with a waiting time power saving control mode for stopping operation of the preheating means 7 when operation of the compressor 6 is stopped. Since operation of the preheating means 7 is stopped as operation of the compressor 6 is stopped when the waiting time power saving control mode is set as an operation control mode, power consumption of the preheating means 7 is reduced as compared with a case where the preheating means 7 is actuated upon stoppage of operation of the compressor 6 and operated until operation of the compressor 6 is started. Since total waiting time power consumption of the air conditioner is reduced correspondingly, power saving is promoted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner and a control method thereof.

[0002]

2. Description of the Related Art Conventionally, in an air conditioner, after the operation of the compressor is stopped, the compressor is operated to prevent the so-called "stagnation" of the compressor from occurring at the next startup and delaying the start of the operation. The compressor is provided with a crankcase heater, and during a standby period from the stop of the operation of the compressor to the next start-up, the temperature of the refrigerating machine oil inside the compressor is preheated by the crankcase heater. Is maintained at or above a predetermined temperature.

[0003]

However, according to the conventional method of continuously operating the crankcase heater during the standby period when the operation of the compressor is stopped, the power consumption of the crankcase heater increases. The majority of the standby power consumption (that is, the power consumption during the standby period of the compressor) of the air conditioner as a whole (about 80%),
This is not preferable from the viewpoint of power saving of the air conditioner.

Accordingly, an object of the present invention is to propose an air conditioner and a control method for the air conditioner, which can promote power saving as a whole device by reducing standby power consumption. .

[0005]

Means for Solving the Problems In the present invention, the following configuration is adopted as specific means for solving such problems.

In the first aspect of the present invention, in the air conditioner provided with the preheating means 7 for preheating the refrigerating machine oil in the compressor 6, the operation control mode that can be set is the surplus heat when the operation of the compressor 6 is stopped. It is characterized in that a standby power saving control mode for stopping the operation of the means 7 is provided.

According to a second invention of the present application, in the air conditioner according to the first invention, the standby power saving mode is set before the compressor 6 starts operating.
Is operated.

According to the third aspect of the present invention, in the air conditioner provided with the preheating means 7 for preheating the refrigerating machine oil in the compressor 6, the operation control mode that can be set is a time period from when the operation of the compressor 6 is stopped. Until there is an operation request for the compressor 6, the operation of the preheating means 7 is stopped. If there is an operation request for the compressor 6, the preheating means 7 is operated, and then the compressor 6 is operated. It is characterized by having a standby power saving control mode to be started.

According to a fourth aspect of the present invention, in the air conditioner according to the first, second or third aspect, the operation of the compressor 6 is controlled by the operation of the preheating means 7. Is started when the temperature rises above a predetermined temperature.

According to a fifth aspect of the present invention, in the air conditioner according to the fourth aspect, the oil temperature of the refrigerating machine oil is determined based on the operation time of the preheating means 7.

According to a sixth aspect of the present invention, in the air conditioner according to the fourth aspect, the oil temperature of the refrigerating machine oil is determined based on the discharge pipe temperature of the compressor 6.

In the seventh invention of the present application, the first, second, and second
In the air conditioner according to the third, fourth, fifth or sixth invention, the standby power control mode can be set by the remote controller 3.

According to an eighth aspect of the present invention, in the control method for an air conditioner provided with a preheating means 7 for preheating the refrigerating machine oil in the compressor 6, in the control method of the air conditioner, the residual heat means corresponds to the stop of the operation of the compressor 6. 7 is characterized in that it is possible to set a standby power saving control mode in which the operation of the control unit 7 is stopped.

According to a ninth aspect of the present invention, in the method for controlling an air conditioner according to the eighth aspect, when the operation of the compressor 6 is started, the preheating means 7 is provided prior to the start of the operation.
Is operated.

According to a tenth aspect of the present invention, in a method for controlling an air conditioner having a preheating means 7 for preheating refrigerating machine oil in a compressor 6, the operation of the compressor 6 from the time when the operation of the compressor 6 is stopped is stopped. Until there is a request, the operation of the preheating means 7 is stopped, and when an operation request for the compressor 6 is made, the preheating means 7 is operated and then the compressor 6 is started. The control mode can be set.

In the eleventh invention of the present application, the eighth and ninth embodiments
Alternatively, in the control method of the air conditioner according to the tenth aspect, the operation of the compressor 6 is started after the refrigerating machine oil rises to a predetermined oil temperature or higher by the operation of the preheating means 7.

According to a twelfth aspect of the present invention, in the method for controlling an air conditioner according to the eleventh aspect, after the preheating means 7 is operated for a predetermined time, the operation of the compressor 6 is started. And

According to a thirteenth aspect of the present invention, in the air conditioner control method according to the eleventh aspect, after the discharge pipe temperature of the compressor 6 rises to a predetermined temperature, the compressor 6
The operation is started.

According to a fourteenth aspect of the present invention, in the air conditioner control method according to the eighth, ninth, tenth, eleventh, or twelfth aspect, the setting of the standby power saving control mode is performed by the remote controller 3. The operation is performed by the following operation.

[0020]

According to the present invention, the following effects can be obtained by adopting such a configuration.

(A) According to the air conditioner according to the first invention of the present application, in the apparatus provided with the preheating means 7 for preheating the refrigerating machine oil in the compressor 6, the operation control mode that can be set is the above-mentioned compression mode. When the operation of the compressor 6 is stopped, the operation of the compressor 6 is stopped when the standby power saving mode is set as the operation control mode. As a result, the operation of the preheating means 7 is stopped, so that, for example, as in the conventional case, the preheating means 7 is operated at the same time as the operation of the compressor 6 is stopped, and this residual heat is maintained during a standby period until the compressor 6 starts operating. Compared with the case where the operation of the means 7 is continued, the standby power consumption of the air conditioner as a whole is reduced by the reduced power consumption of the residual heat means 7 and the power saving is promoted.

(B) According to the air conditioner according to the second aspect of the present invention, in the operation in the standby power saving mode, the preheating means 7 operates before the compressor 6 starts operating. Since the oil temperature of the refrigerating machine oil in the compressor 6 is increased, the operation of the compressor 6 is stopped while the operation of the preheating means 7 is stopped. As a result, good air-conditioning characteristics are ensured at an early stage, and as a result, both power saving by reducing standby power consumption and improvement in air-conditioning characteristics are achieved.

(C) According to the air conditioner according to the third aspect of the present invention, in the air conditioner having the preheating means 7 for preheating the refrigerating machine oil in the compressor 6, the operation control mode which can be set is as follows. The operation of the preheating means 7 is stopped from the time when the operation of the compressor 6 is stopped until the operation request for the compressor 6 is issued, and the operation of the preheating means 7 is operated when the operation request for the compressor 6 is received. After that, the compressor 6 has a standby power saving control mode for starting the operation of the compressor 6,
In the state where the above-mentioned standby power saving control mode is set,
The operation of the preheating means 7 is stopped during a period from when the operation of the compressor 6 is stopped to when there is an operation request for the compressor 6, so that the operation of the compressor 6 is stopped together with the operation of the compressor 6 as in the related art. Compared to the case where the operation of the preheating means 7 is continued during the standby period until the operation of the preheating means 7 and the operation of the compressor 6 is started, the air conditioning is reduced by the power consumption of the preheating means 7. The standby power consumption of the entire machine is reduced, and its power saving is promoted. On the other hand, when there is an operation request for the compressor 6, the operation of the compressor 6 is started after the operation of the preheating means 7, so that the operation of the compressor 6 is started at the time of starting the operation of the compressor 6. Since the oil temperature of the refrigerating machine oil in the compressor 6 is increased, the start-up of the operation of the compressor 6 is promoted, and good air conditioning characteristics are secured early. That is, according to the air conditioner of the present invention, it is possible to achieve both power saving by reducing standby power consumption and improvement in air conditioning characteristics.

(D) According to the air conditioner according to the fourth aspect of the present invention, when the oil temperature of the refrigerating machine oil rises to a predetermined temperature or more by the operation of the preheating means 7, the compressor 6
Is started, the effect of accelerating the start-up of the compressor 6 at the start of the operation is further ensured, and the effects described in the above (a), (b) or (c) become more remarkable. is there.

(E) According to the air conditioner of the fifth aspect of the present invention, the oil temperature of the refrigerating machine oil is determined based on the operation time of the preheating means 7, so that the oil temperature is determined, for example. Compared with the case of the direct detection configuration, the means for detecting the oil temperature and the operation control system of the compressor 6 based on the oil temperature are simplified, and the effect described in the above (d) is realized by a cheaper configuration. Is what you can do.

(F) According to the air conditioner of the sixth aspect of the present invention, the oil temperature of the refrigerating machine oil is determined based on the discharge pipe temperature of the compressor 6, so that, for example, the oil temperature As compared with the case of detecting the oil temperature directly, the means for detecting the oil temperature and the operation control system of the compressor 6 based on the oil temperature are simplified, and the effect described in the above (d) can be reduced by a more inexpensive structure. It can be realized.

(G) According to the air conditioner according to the seventh invention of the present application, the above (a), (b), (c), (d),
The following specific effects are obtained in addition to the effects described in (e) or (f). That is, in the air conditioner according to the present invention, the standby power control mode can be set by the remote controller 3, so that the user of the air conditioner can arbitrarily set the standby power control mode according to his / her own preference and wait. It is possible to select between an energy-saving operation in which the power consumption is suppressed and a comfortable operation in which the start-up of the compressor 6 is emphasized. For example, the setting is such that the setting is fixedly set when the air conditioner is shipped from the factory. Compared to the case, the preference of the user can be accurately reflected on the air conditioning characteristics.

(H) According to the control method of the air conditioner according to the eighth aspect of the present invention, in the control method of the air conditioner provided with the preheating means 7 for preheating the refrigerating machine oil in the compressor 6, When the standby power saving mode is set as the operation control mode, it is possible to set the standby power saving mode in which the operation of the preheating means 7 is stopped in response to the stop of the operation of the machine 6. Since the operation of the preheating means 7 is stopped when the operation of the compressor 6 is stopped, the preheating means 7 is operated at the same time as the operation of the compressor 6 is stopped and the operation of the compressor 6 is started, as in the related art. The standby power consumption of the air conditioner as a whole is reduced by an amount corresponding to the reduction in the power consumption of the preheating means 7 as compared with the case where the operation of the preheating means 7 is continued during the standby period until the power saving. Is promoted.

(I) According to the control method of the air conditioner according to the ninth invention of the present application, when the operation of the compressor 6 is started, the preheating means 7 is operated prior to the operation. Therefore, when the operation of the compressor 6 is started, the oil temperature of the refrigerating machine oil in the compressor 6 has already been raised. Therefore, the operation of the preheating means 7 is stopped while the operation of the compressor 6 is stopped. Although the control is intended to save power, it is possible to obtain a good air conditioning characteristic at an early stage by promoting the start-up of the compressor 6 at the start of operation.

According to the air conditioner control method according to the tenth aspect of the present invention, in the air conditioner control method including the preheating means 7 for preheating the refrigerating machine oil in the compressor 6, The operation of the preheating means 7 was stopped from the time when the operation of the compressor 6 was stopped until the operation request for the compressor 6 was received, and the operation of the preheating means 7 was started when the operation request for the compressor 6 was received. Later, since the standby power saving control mode for starting the operation of the compressor 6 can be set, in the state where the standby power saving mode is set, the compressor 6 starts operating when the compressor 6 is stopped. Until there is an operation request for the compressor 6, the operation of the preheating means 7 is stopped, so that the preheating means 7 is activated and the compressor 6
As compared with the case where the operation of the preheating means 7 is continued during the standby period until the start of the operation of the air conditioner, the standby power consumption of the air conditioner as a whole decreases by the reduced power consumption of the preheating means 7. The power saving is promoted. On the other hand, when there is an operation request for the compressor 6, the operation of the compressor 6 is started after the operation of the preheating means 7, so that the operation of the compressor 6 is started at the time of starting the operation of the compressor 6. Since the oil temperature of the refrigerating machine oil in the compressor 6 is increased, the start-up of the operation of the compressor 6 is promoted, and good air conditioning characteristics are secured early. That is, according to the control method of the air conditioner according to the present invention, it is possible to perform an operation that achieves both power saving by reducing standby power consumption and improvement in air conditioning characteristics.

(G) According to the method for controlling an air conditioner according to the eleventh aspect of the present invention, after the refrigerating machine oil rises to a predetermined oil temperature or higher by the operation of the preheating means 7, the operation of the compressor 6 is started. Since it is started, the start-up promoting action at the start of the operation of the compressor 6 is further ensured,
The effects described in the above (h), (li) or (nu) are more remarkable.

(ヲ) According to the control method of the air conditioner according to the twelfth aspect of the present invention, the increase in the oil temperature of the refrigerating machine oil in the compressor 6 is indirectly performed based on the operation time of the preheating means 7. , And the operation of the compressor 6 is started based on the detected oil temperature. Therefore, for example, the oil temperature is detected as compared with a control in which the oil temperature is directly detected and the operation of the compressor 6 is started. The means for detection and the operation control system of the compressor 6 based on the oil temperature are simplified, and the effect described in (1) above can be realized with less expensive control.

According to the air conditioner control method according to the thirteenth aspect of the present invention, an increase in the oil temperature of the refrigerating machine oil is indirectly detected based on the temperature of the discharge pipe of the compressor 6. , The operation of the compressor 6 is started on the basis of, for example, a means for detecting the oil temperature as compared with a control in which the operation of the compressor 6 is started by directly detecting the oil temperature. In addition, the operation control system of the compressor 6 based on the oil temperature is simplified, and the effect described in (1) above can be realized with less expensive control.

(F) According to the control method of the air conditioner according to the fourteenth invention of the present application, the above (h), (h),
In addition to the effects described in (nu), (ru), (ヲ) or (wa), the following specific effects are obtained. That is, in the air conditioner according to the present invention, since the setting of the standby power saving mode is performed by operating the remote controller 3, the user of the air conditioner can freely set the setting according to his / her preference. To select an energy-saving operation in which the standby power consumption is suppressed and a comfortable operation in which the startup of the compressor 6 is emphasized. For example, the setting is fixedly set when the air conditioner is shipped from the factory. In this case, the user's preference can be accurately reflected on the air conditioning characteristics as compared with the case where the air conditioning is performed.

[0035]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on embodiments shown in the accompanying drawings.

FIG. 1 shows an air conditioner Z according to an embodiment of the present invention. The air conditioner Z is a “split type air conditioner”, and is an indoor unit 1 installed indoors.
And an outdoor unit 2 installed outdoors are connected by a communication pipe (not shown).

The indoor unit 1 has a conventionally well-known structure, and includes a heat exchanger and a fan (both not shown) inside thereof and a control unit beside the heat exchanger and the like. 4 are stored. On the front side of the indoor unit 1 is provided a receiving unit 10 for receiving an operation signal from the remote controller 3, and the operation signal received by the receiving unit 10 is input to the control unit 4.

The outdoor unit 2 has a conventionally well-known structure, in which a heat exchanger and a fan (both not shown) are disposed, and the outdoor unit 2 is disposed beside these heat exchangers. Is provided with a compressor 6 and a control unit 5, respectively. The compressor 6 has a crankcase heater 7.
(Corresponding to "preheating means" in the claims), and a temperature sensor 8 and a timer 9 are provided. The temperature signal output from the temperature sensor 8 and the time signal output from the timer 9 are both input to the control unit 5 as one of the control elements of the compressor 6 and the crankcase heater 7. The control unit 4 on the indoor unit 1 side and the control unit 5 on the outdoor unit 2 side are connected so as to be capable of bidirectional communication.

In this embodiment, the temperature sensor 8 is configured to indirectly detect the oil temperature of the refrigerating machine oil in the compressor 6 by detecting the discharge pipe temperature of the compressor 6. However, the present invention is not limited to such a configuration. In addition, for example, the configuration may be such that the temperature of the casing of the compressor 6 is detected to detect the oil temperature of the refrigerating machine oil therein, A configuration that directly detects the oil temperature of the refrigerating machine oil in 6 or the like can be appropriately adopted.

Incidentally, the crankcase heater 7
Is turned on and off in the opposite direction to the operation of the compressor 6 in order to prevent a delay in the rise of the operation when the operation is restarted after the operation of the compressor 6 is stopped,
The basic control mode is that the compressor 6 is continuously turned on during a standby period after the operation of the compressor 6 is stopped, and is turned off when the compressor 6 is restarted. 6, during the standby period of the crankcase heater 7
Is continuously ON, power consumption during the standby period increases, which hinders power saving of the air conditioner Z as described above.

Therefore, in the air conditioner Z of this embodiment, the present invention is applied to prevent the start-up delay at the start of the operation after the compressor 6 is stopped, and to keep the compressor 6 in the standby period. In order to make it possible to reduce the power consumption during operation as much as possible, the user can arbitrarily set and cancel the setting as one of the operation control modes in the remote controller 3 in a “standby power saving mode”. Is set. In the “standby power saving control mode”, signals (“setting signal” and “non-setting signal”, as described later) corresponding to the presence or absence of the setting are input to the control unit 4 of the indoor unit 1, These signals are used for controlling the compressor 6 and the crankcase heater 7 as part of the standby power saving control in the control unit 5 as described later.

Hereinafter, the standby power saving control by the control unit 4 and the control unit 5 will be specifically described with reference to flowcharts shown in FIGS. In the flowchart, the “standby power saving control mode”
Are simply abbreviated as “standby mode”, and “crankcase heater” is abbreviated as “C / H”.

FIG. 2 shows a judgment process of the standby power saving control based on the setting operation of the remote controller 3. That is, the setting and cancellation of the “standby power saving control mode” in the remote controller 3 can be arbitrarily selected by the occupant of the room according to his / her preference. For this reason, the presence or absence of the setting of the "standby power saving mode" in the remote controller 3 is determined in step Q1. Here, when the control unit 4 of the indoor unit 1 determines that the “standby power saving control mode” is set, a “setting signal” is transmitted from the indoor unit 1 to the control unit 5 of the outdoor unit 2. You. On the other hand, when the control unit 4 of the indoor unit 1 determines that the “standby power saving control mode” is not set, the “unset” is sent from the indoor unit 1 to the control unit 5 of the outdoor unit 2. A signal is transmitted. Based on the reception of the “setting signal” or “non-setting signal”, the control unit 5 of the outdoor unit 2 controls the compressor 6 and the crankcase heater 7.

FIG. 3 shows the contents of control in the control unit 5 on the outdoor unit 2 which is performed in response to a signal from the control unit 4 on the indoor unit 1 side. Hereinafter, this will be described in detail.

First, in step S1, it is determined whether or not a "setting signal" indicating that the "standby power control mode" has been set is received from the indoor unit 1 (in other words, if the indoor occupant is saved). The “standby power saving mode” is operated by operating the remote controller 3 with the intention of power operation.
Has been performed, or has the setting operation of the “standby power saving control mode” been performed with the intention of driving with an emphasis on comfort by accelerating the startup of the compressor 6).

Here, when it is determined that the "setting signal" has not been received (in other words, since the "non-setting signal" has been received, the indoor resident does not request the standby power saving control,
If it is considered that the execution of the normal operation control is requested), it is determined in step S10 whether the compressor 6 is currently in the "OFF operation" or the "ON operation". Therefore, in this case, as before,
The operation of the crankcase heater 7 is controlled in accordance with the operation of the compressor 6. That is, when it is determined that the compressor 6 is currently in the “OFF operation”, the crankcase heater 7 is turned “ON”, and the compressor 6 is turned on in preparation for the restart of the compressor 6. Preheating is performed to maintain the temperature of the refrigerating machine oil therein (step S11). On the other hand, if it is determined that the compressor 6 is currently "ON", it is not necessary to preheat the compressor 6, and therefore the crankcase heater 7 is set to "OFF". (Step S12).

On the other hand, if it is determined in step S1 that the "setting signal" has been received from the indoor unit 1 (in other words, the indoor occupant has requested execution of the standby power saving control). Then, it is determined whether or not the air conditioner Z has been stopped (step S2). Here, if it is determined that the stop operation has been performed, the crankcase heater 7 is turned off (step S9).

The "OFF operation" of the crankcase heater 7 in step S9 includes a case where the "OFF operation" is maintained and a case where the "OFF operation" is forcibly changed to "OF operation".
Both cases when changing to "F operation" are included. That is,
In a state where the standby power saving control is already performed upon receiving the “setting signal” at the time when the stop operation is performed, as described later, even if the compressor 6 is “ON”, the “OFF operation” is performed. Even if the crankcase heater 7 is turned off
"Operation" (see step S7), so that the "off operation" of the crankcase heater 7 is maintained with this stop operation. On the other hand, when the “setting signal” is received in a state where the normal control is performed in response to the “non-setting signal” (that is, the “standby power saving in the air conditioner Z operating state”). Control mode ”is set), the crankcase heater 7 is turned“ OFF ”when the compressor 6 is“ ON ”,
When the compressor 6 is in the "OFF operation", the crankcase heater 7 is in the "ON operation". Therefore, in the former case, the "OFF operation" is maintained, and in the latter case, the "OFF operation" is maintained. Forcibly switching from "ON operation" to "OFF operation" is performed. Therefore, when a stop operation is performed after the “setting signal” is received, the crankcase heater 7 is always set to the “OFF operation”. As a result, power consumption due to the operation of the crankcase heater 7 during the standby period of the compressor 6 is avoided, thereby realizing standby power saving.

On the other hand, in step S2, the air conditioner Z
If it is determined that the stop operation has not been performed, in other words, if it is determined that the air conditioner Z is in the operating state, the operation state of the compressor 6 is subsequently determined in step S3. Then, here, the compressor 6 is turned on
In this case, it is determined that the normal operation control has been performed before the standby power saving control based on the reception of the “setting signal” is started. In normal operation control, the compressor 6 is turned on.
"Crank case heater 7"
Is set to "OFF operation"("OFFoperation" is maintained), and "ON operation" of the compressor 6 thereafter is permitted.

On the other hand, in step S3, it is determined that the compressor 6 is in the "OFF operation". In this case, the operation of the air conditioner Z is not performed until after the "setting signal" is received. Two cases are conceivable: a case where the operation is performed, and a case where the air conditioner Z is already operated before the reception of the “setting signal” and the compressor 6 is “OFF operation”.

Here, the former case is a case where the compressor 6 is restarted after waiting, and a case where it is necessary to prevent a delay in the rise of the operation of the compressor 6. Therefore, in this case, first, the compressor 6 is preheated by turning on the crankcase heater 7 to increase the temperature of the refrigerating machine oil therein (step S4). The “ON operation” of the crankcase heater 7 is performed until the discharge pipe temperature of the compressor 6 becomes equal to or higher than X degrees (step S5) or until the Y time elapses from the “ON operation” of the crankcase heater 7. (Step S6) is continued. When either of these conditions is satisfied, it is considered that the oil temperature of the refrigerating machine oil has already risen to a temperature at which no delay in the rise of operation occurs, and therefore, if any of these conditions is satisfied, The crankcase heater 7 is turned off (step S7), and the compressor 6 is turned on.
That is, restart is permitted (step S8). As a result, despite the fact that the crankcase heater 7 is turned off during the standby period of the compressor 6 to save the standby power, the “sleep” when the operation of the compressor 6 is restarted is reliably prevented. Will be. The saving of standby power and the "prevention of stagnation" of the compressor 6 are compatible.

On the other hand, in the latter case, the crankcase heater 7 is already in the "ON operation", and the temperature of the discharge pipe of the compressor 6 is already X degrees or higher (step S5). Immediately, the crankcase heater 7 is turned off (step S7), and the compressor
N operation ", that is, the restart is permitted (step S8).

As described above, by executing the control shown in FIGS. 2 and 3, the crankcase heater 7 is turned off during the standby period of the compressor 6 to reduce standby power. Nevertheless, a delay in startup when the operation of the compressor 6 is restarted is reliably prevented, and both a reduction in standby power and an improvement in air conditioning characteristics by promoting the startup of the compressor 6 are realized.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of an air conditioner according to an embodiment of the present invention.

FIG. 2 is a control flowchart in a method for controlling an air conditioner of the present invention.

FIG. 3 is a control flowchart in the control method of the air conditioner of the present invention.

[Explanation of symbols]

1 is an indoor unit, 2 is an outdoor unit, 3 is a remote controller,
4 and 5 are control units, 6 is a compressor, 7 is a crankcase heater, 8 is a temperature sensor, 9 is a timer, 10 is a receiving unit,
Z is an air conditioner.

Claims (14)

[Claims] An air conditioner provided with a preheating means (7) for preheating refrigerating machine oil in a compressor (6), wherein a settable operation control mode is provided when the operation of the compressor (6) is stopped. An air conditioner comprising a standby power saving control mode for stopping the operation of the preheating means (7). 2. The air conditioner according to claim 1, wherein the standby power saving mode operates the preheating means (7) prior to starting the operation of the compressor (6). . 3. An air conditioner provided with a preheating means (7) for preheating refrigerating machine oil in a compressor (6), wherein the operation of the compressor (6) is stopped as a settable operation control mode. Until the operation request for the compressor (6) is made, the operation of the preheating means (7) is stopped, and when the operation request for the compressor (6) is made, the preheating means (7) is operated. An air conditioner having a standby power saving mode for starting operation of the compressor (6) after the operation. 4. The compressor according to claim 1, 2 or 3, wherein the compressor (6) is started to operate after the oil temperature of the refrigerating machine oil rises to a predetermined temperature or more by the operation of the preheating means (7). An air conditioner characterized by the following. 5. The air conditioner according to claim 4, wherein the oil temperature of the refrigerating machine oil is determined based on an operation time of the preheating means (7). 6. The air conditioner according to claim 4, wherein an oil temperature of the refrigerating machine oil is determined based on a discharge pipe temperature of the compressor (6). 7. The air conditioner according to claim 1, wherein the standby power saving mode is settable by a remote controller (3). 8. A method for controlling an air conditioner comprising a preheating means (7) for preheating refrigerating machine oil in a compressor (6), wherein the method comprises the steps of: A control method for an air conditioner, wherein a standby power control mode for stopping operation of a residual heat means (7) can be set. 9. The control method for an air conditioner according to claim 8, wherein when the operation of the compressor (6) is started, the preheating means (7) is operated prior to the start of the operation. 10. A method for controlling an air conditioner comprising a preheating means (7) for preheating refrigerating machine oil in a compressor (6), the method comprising: Until there is an operation request for 6), the operation of the preheating means (7) is stopped, and if there is an operation request for the compressor (6), the operation of the preheating means (7) is started. A method for controlling an air conditioner, wherein a standby power control mode for starting operation of a compressor (6) can be set. 11. The operation of the compressor (6) according to claim 8, 9 or 10, wherein the operation of the compressor (6) is started after the refrigerating machine oil rises to a predetermined oil temperature or higher by the operation of the preheating means (7). Air conditioner control method. 12. The method for controlling an air conditioner according to claim 11, wherein the operation of the compressor (6) is started after the preheating means (7) is operated for a predetermined time. 13. The control method for an air conditioner according to claim 11, wherein the operation of the compressor (6) is started after the discharge pipe temperature of the compressor (6) rises to a predetermined temperature. . 14. The control method for an air conditioner according to claim 8, wherein the setting of the standby power saving mode is performed by operating a remote controller (3). .