JPH04198649A - Inverter with 1/f fluctuation function for air conditioning - Google Patents

Abstract

PURPOSE:To provide a 1/f fluctuation device in a space saving and at low cost by a method wherein a control circuit is controlled by means for setting a reference frequency acting as a reference for an inverter operation, a reference step setting means, a period setting means, a manual 1/f fluctuation selection means and a remote 1/f fuzzy selection means. CONSTITUTION:A signal from a remote frequency setting means 4 or a manual frequency setting means disposed in an inverter 1 is received at an inverter 9 through a control circuit 6. The number of rotation of a motor 7 for driving a fan 8 is made variable. A reference frequency required when the motor is operated in reference to the reference frequency is set such that a signal inputted from a remote frequency setting means 4 under a remote operation or the manual frequency setting means 5 under a manual operation is set by a reference frequency setting means 10, a setting is carried out with a reference step setting means 11 for varying an amplitude of frequency and time for outputting 1/f fluctuation, and a period for determining a degree of 1/f fluctuation feeling is set by a period setting means 12. A changing-over between a normal inverter operation and 1/f fluctuation operation is set by a manual 1/f fluctuation selection means 13 under the manual operation.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an inverter device with a 1/f fluctuation function for air conditioning that expands the range of use of a 1/f fluctuation air conditioning system.

BACKGROUND OF THE INVENTION In recent years, air conditioners that utilize fluctuating wind have become popular.

Conventionally, this type of fluctuation air conditioner has been constructed as shown in FIG. In the figure, 21 is an inverter, a converter section 22 performs DC conversion, and a power circuit section 23 performs DC charging. Then, the control circuit section 24 receives a signal of 1/f fluctuation from an external DDC (direct digital controller) 25, and sends a frequency setting signal to an inverter section 26 that converts it into AC.
The operating frequency of the fan 28 was changed, and the rotation speed of the fan 28 was changed to generate a 1/f fluctuation wind.

On the other hand, as shown in FIG. 3, the 1/f fluctuation signal is at a reference frequency of 29 degrees, which is the standard for inverter operation.
A 1/f fluctuation period of 11°31 was created in the DDC 6, and a signal was sent to the control circuit section 5 of the inverter 21 to realize 1/f fluctuation operation.

Problems to be Solved by the Invention However, in such a conventional configuration, a dedicated controller (DDC 6) is required to generate the 1/f fluctuation, which increases the cost of the control panel and wiring. Therefore, even when it is desired to install a 1/f fluctuation device, there is a problem in that it is not cost effective.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an inverter with a 1/f fluctuation function for air conditioning, which allows a 1/'f fluctuation device to be obtained in a space-saving manner and at a low cost.

Means for Solving the Problems In order to achieve the above object, the inverter with a 1/f fluctuation function for air conditioning according to the present invention includes a reference frequency setting means that serves as a reference for inverter operation, and a means for setting an output frequency when creating a 1/f fluctuation. A reference step setting means for creating fluctuations, a period setting means for changing the period of 1/f fluctuation, and a manual step setting means for changing the period of 1/f fluctuation.
A local 1/f fluctuation selection means for performing fluctuation operation and a remote 1/f fluctuation selection means for performing 1/f fluctuation operation using a switch provided remotely.
This is an inverter having a 1/f fluctuation function using f fluctuation selection means and a control circuit controlled by each of these means.

Function: The inverter with a 1/f fluctuation function for air conditioning according to the present invention has the above-mentioned configuration, so that the 1/f fluctuation operation can be performed within the function of the inverter. It becomes unnecessary.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2. As shown in the figure, the inverter 1 includes a converter section 2 that converts alternating current into direct current, a power circuit section 3 that charges the direct current voltage from this converter section 2, and a remote station wave number setting means 4 or An inverter section 9 is provided which receives a signal inputted from a hand-held frequency setting means 5 which is manually operated at hand via a control circuit section 6 to vary the rotational speed of a motor 8 that drives a fan 7.

As a function for performing 1/f fluctuation, a signal input from the remote station wave number setting means 4 or the local frequency setting means 5 is used to obtain a reference frequency necessary when the motor 8 normally operates. A reference frequency setting means 10 for setting a reference frequency, a reference step setting means 11 for changing the amplitude and time of a frequency that produces 1/f fluctuation, and a period setting means 12 for setting a period for determining the degree of 1/f fluctuation feeling are provided. There is.

Furthermore, as means for switching between normal inverter operation and 1/f fluctuation operation, a local 1/f fluctuation selection means 13 and a remote 1/f fluctuation selection means 14 are provided.

To explain the operation in the above configuration, a signal from the remote frequency setting means 4 or the local frequency setting means 5 provided in the inverter 1 is received by the inverter section 9 via the control circuit section 6, and the motor drives the fan 7. The reference frequency (shown in FIG. 3) required for the reference operation of the motor 7 by varying the rotation speed of the motor 8 is determined by the remote station wave number setting means 4 during remote operation or by the local frequency setting means 5 during manual operation. Reference frequency setting means 1
0, set by the reference step setting means 11 that changes the amplitude and time of the frequency that produces l/f fluctuation,
/f A cycle that determines the degree of fluctuation is set by the cycle setting means 12. Switching between normal inverter operation and 1/f fluctuation operation is performed using the local 1/f fluctuation selection means 13 in the case of assisted operation, or by the remote 1/f fluctuation selection means 13 in the case of external operation.
The f-fluctuation selection means 14 can receive signals from the outside and perform operations.

Effects of the Invention As is clear from the above description of the embodiments, according to the present invention, an inverter that controls the rotation speed by changing the normal motor frequency can be switched to 1/f fluctuation control when necessary. Therefore, when performing 1/f fluctuation control, there is no need to provide a separate controller for generating 1/f fluctuation (this has the effect of allowing 1/f fluctuation air conditioning to be performed in a space-saving and low-cost manner). The resulting inverter with a 1/f fluctuation function for air conditioning can be provided.

[Brief explanation of the drawing]

FIG. 1 is a circuit block diagram of an air conditioner with a 1/f fluctuation function according to an embodiment of the present invention, FIG. 2 is a circuit block diagram of a conventional 1/f fluctuation air conditioner, and FIG.
It is a f fluctuation pattern diagram. 1... Inverter, 10... Reference frequency setting means, 11... Reference step setting means,
12... Frequency setting means, 13... Local 1/f fluctuation selection means, 14... Remote 1/f fluctuation selection means. Name of agent: Patent attorney Akira Koeji and two others Figure 1

Claims (1)

[Claims] Reference frequency setting means serving as a reference for inverter operation;
A reference step setting means for creating a fluctuation in the output frequency when creating a /f fluctuation, a period setting means for changing the period of the 1/f fluctuation, and a hand 1 for manually performing the 1/f fluctuation operation.
1 by means of /f fluctuation selection means and a remotely installed switch.
An inverter with a 1/f fluctuation function for air conditioning, comprising a remote 1/f fluctuation selection means for performing a /f fluctuation operation, and a control circuit for controlling an air conditioner controlled by the respective means.