JPH0756403B2 - Air conditioner operation control method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method of controlling the operation of a compressor used in an air conditioner, and more specifically, dividing room temperature into a plurality of zones, The present invention relates to an operation control method for an air conditioner that switches operating frequencies.

[Conventional example] Conventionally, in this type of air conditioner, for example, the room temperature and the set temperature (temperature set by the remote control device) detected by a temperature sensing element such as a thermistor provided in the indoor unit. The operating frequency of the compressor is switched according to the difference between the temperature and the room temperature so that the room temperature approaches the set temperature.

By the way, the room temperature control method, which is one of the operation control methods for the compressor, divides the room temperature into a plurality of zones and switches the operation frequency of the compressor according to the zones. That is, for example, as shown in FIG.
It shall be divided into Y, G, A, B, and C zones. At this time, it comes to C zone when room temperature detected by the thermistor or the like (T _R) is B zone when less than the set temperature (Ts), further temperature (Ts-α ₂₎ below. On the other hand, it comes to Y zone when A zone is G zone, the temperature (Ts + α ₃₎ or more in higher than the temperature (Ts + α ₁₎ when higher than room (T _R) is the set temperature (Ts).

Here, to describe the heating operation, for example, when the room temperature (T _R) is in the C zone, due to the large difference between the set temperature, the operating frequency of the compressor is highest. When the room temperature (T _R) is entered to elevated B zone, the difference between the set temperature is small, the operating frequency is lowered. Further, when the room temperature (T _R) is entered to elevated A zone, its operating frequency is further lowered. However, at room temperature _{(T R)} is increased, the temperature (Ts + α ₁₎
When it enters the G zone beyond, the operating frequency is the value that makes the air conditioner the minimum capacity (minimum value; eg 30Hz)
Can be lowered to. Nevertheless, to rise at room temperature (T _R), when entering the Y zone beyond the temperature (Ts + α _3), the operation of the compressor is stopped. The room temperature (T
_{Although the} case where _{R 1} ) is zone up has been described, when the zone is down, the operating frequency of the compressor is increased on the contrary. In this case, as shown in the figure, the boundary temperatures divided into a plurality of zones are set low.

Also, room temperature _{(T R)} a predetermined time in the same zone (e.g. 3
When it stays for a while, the operating frequency of the compressor is changed to make the indoor environment more comfortable. That is, for example, when the zone remaining for the predetermined time is the A zone higher than the set temperature (Ts), the operating frequency is lowered, and conversely, when the zone is the B and C zones lower than the set temperature (Ts), the operating frequency is lowered. It is designed to raise the frequency.

In this way, change the operating frequency of the compressor for each zone,
The indoor temperature is kept close to the set temperature.

[Problems to be Solved by the Invention] In the above operation control method, the operating frequency of the compressor is kept constant before the zone where the operation of the compressor is stopped so that the air conditioner has the minimum operating capacity. Value (eg 30
There is a zone (G zone) fixed at (Hz) to prevent the compressor from turning on and off.

However, for example, when the room temperature (Ts) enters the G zone from the A zone, the operating frequency is not always constant, so the difference between the operating frequency when entering the G zone and 30 Hz may become large. , At that time, I felt uncomfortable. In particular, when the set temperature (Ts) is contained in the A zone before the G zone, the operating frequency of the compressor becomes higher as the heating load becomes higher (for example, as the outside air temperature becomes lower), so the operating frequency of the G zone becomes 30 Hz. However, there is a problem in that the comfort of the vehicle is reduced due to a further increase in the difference between the above and the unpleasant feeling.

The present invention has been made in view of the above problems, and an object thereof is to provide an operation control method of an air conditioner capable of improving comfort.

To achieve the above object [Means for Solving the Problems] The present invention divides the room into a plurality zones based on the difference between the set by the remote controller or the like temperature (Ts) and ambient temperature (T _R), An air conditioner that switches the operating frequency of a compressor in accordance with those zones, of the plurality of zones, a zone in which the operation of the compressor is stopped (Y
Upon room temperature the issued to the previous zone zone) (G zone) (T _R) enters the operating circumferential speed of the compressor in the operation control method for a minimum value of the air conditioner, it is the detected When the room temperature (T _R ) enters the G zone, it has operating frequency determination control means for determining the operating frequency of the compressor in the G zone according to the operation frequency when the room temperature (T _R ) enters the G zone. The gist is that the above-mentioned minimum value is changed according to the operating frequency at the time of entering the G zone.

Further, the operation control method of the present invention is such that the operating frequency in the G zone is increased in direct proportion to the operating frequency when entering the G zone.

[Operation] Since the above method, when room temperature (T _R) enters the G zone, according to the operating frequency of the compressor at that time to enter,
Its operating frequency is changed. That is, the operating frequency in the G zone becomes a value other than the minimum value as the operating capacity of the air conditioner, and the operating frequency at the time of entering the G zone becomes higher as the operating frequency becomes higher. Therefore, for example, the operating frequency f when entering the G zone is 30 (Hz) ≤ f <50 (H
In the case of the range of z), the operating frequency in the G zone is set to 30 (Hz), and the operating frequency f is 51 (Hz) ≦ f <
When it is in the range of 70 (Hz), the operating frequency in the G zone is set to 40 (Hz) and the operating frequency f is 71 (H
z) ≤ f <90 (Hz), the operating frequency in the G zone is set to 60 (Hz), and the operating frequency f is 91 (Hz) ≤ f <110 (Hz). In this case, the operating frequency in the G zone is set to 80 (Hz), and when the operating frequency f is in the range of f> 110 (Hz), the operating frequency in the G zone is 100 (H).
z).

In this way, the difference between the operating frequency in the G zone and the operating frequency in the G zone does not become large, the room temperature does not change rapidly, and the person does not feel uncomfortable.

[Examples] Examples of the present invention will be described below with reference to the drawings.

In FIG. 1, the air conditioner includes a setting device 1 such as a remote controller for setting the indoor temperature, a room temperature detector 2 such as a thermistor for detecting the indoor temperature, a set temperature (Ts) by the setting device 1 and a room temperature. calculating the difference between the room temperature (T _R) which is detected by the detector 2, and determines the operating frequency, and outputs a control circuit 3 to issue a command to the operating frequency, the inverter control signal based on the command inverter The section 4 and the compressor 5 driven by the inverter control signal at the operating frequency are provided. Incidentally, the control circuit 3 has a zone determination function of room temperature room temperature for partitioning (T _R) into a plurality zones (T _R) set and the detected room temperature (T _R). Although not shown, the air conditioner is provided with other necessary circuits and the like.

Next, the operation of the operation control method applied to the air conditioner having the above configuration will be described based on the flowchart of FIG.

First, assuming that the air conditioner is in a heating operation and the temperature (Ts) is set by a remote controller or the like, the control circuit 3 determines the operating frequency of the compressor 5, so that the room temperature detector 1 is used. with room temperature _{(T R)} is detected (step ST1), the set temperature (Ts) and its ambient temperature _(T R)
Is calculated, and the operating frequency command of the compressor 5 is issued according to the calculated value. Then, based on the operation frequency command, the compressor 5 is driven by the inverter unit 4 so that the room temperature approaches the set temperature and is maintained at the temperature near the set temperature.

Here, as shown in FIG. 4, the detected room temperature (T
_{When R)} is in the A zone, that is, when a certain air conditioner to the previous zone zone to a minimum operating capacity, some kind of room temperature (T _R) is increased by the influence, upon entering the G zone (Step ST2), operating frequency f of the compressor 5
Is determined to be 30 (Hz) ≦ f <50 (Hz) (step ST3). If it is within that range, the operating frequency of the compressor 5 is determined to be 30 (Hz), and a command for this operating frequency is issued (step ST4). Then, in the inverter unit 4, the compressor 5 is driven at the operation frequency of 30 (Hz) based on the operation command (step ST5). That is, when the room temperature (T _R ) changes from the A zone to the G zone, the operating frequency f is changed to a value that is not so different, so that people in the room do not feel uncomfortable.

On the other hand, when the operating frequency f of the compressor 5 is 50 (Hz) or higher, 51
When it is determined that the value is within the range of (Hz) ≤ f <70 (Hz) (step ST6), the operating frequency of the compressor 5 is set to 40 (Hz), which is small when entering the A zone to the G zone. It is decided and a command for this operating frequency is issued (step ST
7). Then, in the inverter unit 4, the compressor 5 is driven at the operation frequency of 40 (Hz) based on the operation command (step ST5).

When it is determined that the operating frequency f of the compressor 5 is 70 (Hz) or more and 71 (Hz) ≤ f <90 (Hz) (step ST8), the operation of the compressor 5 is performed. Frequency is A
60 (Hz) with little difference when entering the G zone from the zone
Is determined and a command for this operating frequency is issued (step ST9). Then, in the inverter unit 4, the compressor 5 is driven at the operation frequency of 60 (Hz) based on the operation command (step ST5).

Further, when it is determined that the operating frequency f of the compressor 5 is 90 (Hz) or more and 91 (Hz) ≤ f <110 (Hz) (step ST8), the operation of the compressor 5 is performed. The number of laps is 80 when entering the G zone from the A zone.
(Hz), and a command for this operating frequency is issued (step ST9). Then, in the inverter unit 44, the compressor 5 is driven at the operation frequency of 80 (Hz) based on the operation command (step ST5).

Furthermore, the operating frequency f of the compressor 5 is 110 (H
z) or more (step ST8), the operating frequency of the compressor 5 is set to 100 (Hz) with a small difference when entering from the A zone to the G zone, and this operating frequency command is issued. (Step ST9). Then, in the inverter unit 4, the compressor 5 operates based on the operation command.
It will be driven at an operating frequency of 100 (Hz) (step ST5).

Thus, at room temperature (T _R) is upon entering the G zone from the A zone, the operation frequency f of the compressor 5 in G zone
Is switched to a value having a small difference from the frequency at which the A zone enters the G zone. Therefore, the higher the operating frequency f when entering the G zone, the higher the operating frequency f when entering the G zone.

Here, as an example, as shown in FIG.
When the compressor 5 is driven at an operating frequency of 80 (Hz) and the room temperature (T _R ) is in the zone A (area a in the figure), the room temperature (T
_It is assumed that _R ) has risen (solid line in the figure) and that the G zone has been entered. In this case, since the operating frequency is 80 (Hz), the operating frequency step ST of the compressor 5 in the G zone
It is set to 60 (Hz) by 8 and ST9. Then, as shown in solid line in the figure, room temperature (T _R) is the descent rate of the conventional 30 (H
z) is smaller than the case (dashed line in the figure),
The discomfort in the room can be suppressed to a small level, and when the temperature is controlled to the set temperature (Ts) after that, the discomfort can be performed without causing the discomfort.

In the above embodiment, when the room temperature (T _R ) is zoned up to the G zone, the value of the operating frequency range at the time of zone up and the value of the G zone operating frequency are not always the second value.
It does not have to be the same as the value shown in the flowchart of the figure.

[Effects of the Invention] As described above, according to the air conditioner of the present invention,
Operation control method at room temperature which is detected (T _R) is to the minimum value the operating frequency of the compressor in the previous G zone Y zone to stop controlling the operation of the compressor (minimum operating capacity of the air conditioner) In the above, the minimum value of the operating frequency in the G zone is changed according to the operating frequency of the compressor when the room temperature is zoned up to the G zone, and the higher the operating frequency at the time of zone up is, the higher the minimum value is. As a result, when the room temperature is zoned up to the G zone, there is little change in the operating frequency of the compressor, it is not necessary to change the room temperature suddenly, it does not cause discomfort to people, and it is effective in improving comfort. There is.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, and is a schematic block diagram of an air conditioner to which an operation control method is applied. FIG. 2 is a flow chart diagram for explaining the operation control method.
FIG. 4 is a graph for explaining the operation control method described above.
FIG. 1 is a graph for explaining a conventional air conditioner operation control method. In the figure, 1 is a temperature setting device (remote control or the like), 2 is a room temperature detector (thermistor or the like), 3 is a control circuit (microcomputer), 4 is an inverter section, and 5 is a compressor.

Claims (2)

[Claims] 1. A divided the room into multiple zones based on the difference between the set by the remote controller or the like Temperature (Ts) and ambient temperature (T _R), an air conditioner switch the operating frequency of the compressor depending on their zone the one of the plurality zones, upon the room temperature where the detected to the previous zone (G zone) of the compressor zone to stop the operation of (Y zone) (T _R) falls, the operating frequency of the compressor in the operation control method of the lowest trough of an air conditioner, the operating frequency of the room temperature to be detected (T _R) in response to the operation frequency when entering the G zone, determines the operating frequency of the compressor at the G zone a decision control unit, the room temperature (T _R) is upon entering the G zone, an air conditioner, characterized in that said minimum value be changed according to the operation frequency detected when the currently entering the G zone Operation control method. 2. The operation control method for an air conditioner according to claim 1, wherein the minimum value is set to be higher as the operating frequency when entering the G zone is higher.