JP2009221977A - Method of controlling expansion of number of compressors to be operated - Google Patents

Abstract

Kind Code: A1 In a compressor group consisting of a plurality of unit control compressors whose number of operations is controlled and a constant operation compressor which is always operated, the compressor type of the compressor group corresponding to the amount of air used on the use side We provide a method for controlling the number of operating compressors to determine the number of units and make the life of all compressors uniform.
For example, the number of operating units of six unit control compressors is changed, and the number of constantly operating compressors is set to three. The selection of this combination covers all nine compressors and considers using each compressor on average.
[Selection] Figure 3

Description

  The present invention relates to a compressor that is actually operated in a group of compressors that are expanded with a plurality of compressors that are controlled in accordance with the amount of air used and a plurality of compressors that are always operated regardless of the amount of air used. The present invention relates to a compressor operation number expansion control method in which operation control is performed in accordance with the amount of air used.

Usually, a plurality of compressors are arranged, and a method of controlling the number of compressors operated corresponding to the amount of air used is employed. However, depending on the user, there are cases where the amount of air used is small even when all of a plurality of compressors whose operation is controlled are operated, but in the prior art, this was handled as an optional specification. Examples of conventional operation control methods for a plurality of compressors include “Patent Document 1” and “Patent Document 2”.
Japanese Patent Laid-Open No. 2003-56924 (FIG. 1) JP-A-6-272669 (FIG. 1)

“Engine heat pump” of “Japanese Patent Application Laid-Open No. 2003-56924” of “Patent Document 1” averages the number of times of use of a plurality of compressors, and does not relate to expansion number control.
In addition, the “method and apparatus for controlling the number of operation control of compressors” in “Japanese Patent Laid-Open No. Hei 6-272669” in “Patent Document 2” equalizes the life of a plurality of compressors and is different from the present invention described later. To do.
That is, “Patent Document 1” and “Patent Document 2” relate to operation control of a plurality of compressors, but employ means and methods relating to the expansion number corresponding to a larger amount of air usage as described above. is not. For users who expect a large amount of air to be used, there is no problem if the number of compressors for controlling the number of units is increased, but the number of compressors for controlling the number of units has a certain unit standard as a compressor manufacturer. It is not generally done to prepare a unit control compressor having a number larger than this number as a standard specification.
Therefore, it is necessary to prepare a compressor corresponding to each time as a special specification for a user who uses a large amount of air more than the standard, which is very troublesome.

  On the other hand, even the above-mentioned user with a large amount of air usage does not always have a large amount of air usage and may change. In this case, there arises a problem that the additional compressor does not sufficiently perform its function. Therefore, there has been a demand for a compressor control method that can easily cope with users exceeding the standard specification and can cope with changes in the amount of air used by the users.

  The present invention has been invented based on the above requirements, and the standard specification unit control compressor can smoothly cope with the case where the amount of air used is insufficient, and further responds to changes in the amount of air used by the user. An object of the present invention is to provide a method for controlling the number of operating compressors so that all compressors can be used on average.

  In order to achieve the above object, the present invention provides a plurality of compressors whose operation number is controlled (hereinafter referred to as a unit control compressor) and a plurality of compressors that are always operated. (Provisionally referred to as a compressor for continuous operation) is a method for controlling the number of operating a plurality of compressors, wherein the method changes the combination of the plurality of compressors for controlling the number of units and the compressor for continuous operation. It is characterized by selectively controlling the compressor to be operated in accordance with the required air amount on the use side.

  According to the compressor operation number expansion control method of claim 1 of the present invention, in addition to the standard specification number control compressor, a constant operation compressor is provided, and further, a combination of these compressors is used to change the number of units used. In addition, it is possible to smoothly cope with a user having a large amount of air used, and to cope with a change in the amount of air used. Furthermore, the average life of the compressors can be equalized by using all the compressors on average.

Embodiments of the compressor operation number expansion control method of the present invention will be described below in detail with reference to the drawings.
In the following embodiments, the number of compressors for controlling the number of units is six and the number of compressors for regular operation is three. However, the present invention is not limited to this.
As shown in FIG. 1, in this embodiment, compressors 1 to 4 are arranged in the compressor room 100 on the first floor, and five compressors 5 to 9 are arranged in the compressor room 200 on the second floor. It is assumed that On the other hand, a control panel 3 including a control unit 1 and a constant ON unit 2 is disposed on an operation panel of a compressor (not shown). The control unit 1 has six operation units No. 1 to No. 6, and the always-on unit is provided with three operation units A, B, and C, respectively. FIG. 2 shows cycles (a), (b), and (c) of three embodiments described below, but the cycles are limited to those of (a), (b), and (c). Not what you want.

  FIG. 3 shows the cycle (a) of the first embodiment, in which No. 1, No. 2, No. 3 are connected to the No. 1, No. 2 and No. 3 operation sections of the control unit 1, and No. 4, No. 5, The state in which No. 6 machine is connected to No4, No5, No6 operation part of control unit 1 is shown. In this case, a state in which the No. 7, No. 8, and No. 9 units are always connected to the operation units A, B, and C of the ON unit 2 is shown. That is, in this embodiment, No. 1, No. 2, No. 3, No. 4, No. 5, No. 5, and No. 6 are compressors to be controlled, and No. 7, No. 8, No. 9 are compressors that are always operated. . As an example, all compressors from No. 1 to No. 6 may be operated depending on the amount of air used, and all of No. 1 to No. 6 may not be operated, and the combination is freely selected.

  In the first embodiment, the No. 7, No. 8, and No. 9 units are connected to the always-on unit 2. However, when these three compressors are always connected to the always-on unit 2, these three compressors are always connected. The lifespan is shorter than other Units 1, 2, 3, 4, 4, 5, and 6.

  Example 2 shows the cycle (b) of FIG. 2, and as shown in FIG. 4, the first, second, and third machines are connected to the operation parts of the A, B, and C of the ON unit 2 at all times. No. 4 of the operation unit of the control unit 1, No. 5 is connected to No. 2, No. 6 is connected to No. 3, No. 7 is connected to No. 4, No. 8 is connected to No. 5, and No. 9 is connected to No. 6.

  Example 3 shows the cycle (c) of FIG. 2, and as shown in FIG. 5, the No. 4, No. 5, and No. 6 units are connected to the operation parts of the A, B, and C units of the always-on unit 2, and the control is performed. No. 7 unit, No. 8 unit, No. 3 unit No. 9, No. 4 unit No. 1, No. 5 unit No. 2 and No. 6 unit No. 6 are connected to the operation unit No. 1 of the unit 1 respectively.

  As described above, according to the present invention, the number of operating units can be freely changed in accordance with the air usage on the use side. In addition, the life of the entire compressor can be made constant by changing the always-on compressor. In the present invention, the combination examples as described above are shown. However, the present invention is not limited to the above-described embodiments, and those of the same technical category are of course applied.

  The present invention is applied to a user who uses a relatively large amount of compressor air, and is arbitrarily set according to the content (large or small) of the amount of air used, and its usage range is extremely wide. .

The block diagram which shows the whole structure of this invention. The combination table | surface which shows several pieces (3 pieces) of the combination cycle of this invention. Explanatory drawing which shows the connection state of the operation part of Example 1, and a compressor. Explanatory drawing which shows the connection state of the operation part of Example 2 and a compressor. Explanatory drawing which shows the connection state of the operation part and compressor of Example 3. FIG.

Explanation of symbols

1 control unit 2 always-on unit 3 control panel 100 first floor compressor room 200 second floor compressor room

Claims (1)

  Operation of a plurality of compressors composed of a plurality of compressors whose operation number is controlled (hereinafter referred to as a unit control compressor) and a plurality of compressors that are always operated (provisionally referred to as a constant operation compressor) A method for controlling the number of units, wherein the method selectively controls a compressor to be operated in accordance with a required air amount on the use side while changing a combination of a plurality of the unit control compressors and a compressor for continuous operation. Characteristic compressor expansion control method.

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