JPS62751A - Control device of air conditioner - Google Patents

Abstract

PURPOSE:To enable effective utilization of capability of an air conditioner, by a method wherein the detecting values of a room temperature and an open air temperature are compared with the reference values of a room temperature and an open air temperature, respectively, to determine maximum operation frequency of the air conditioner. CONSTITUTION:A room temperature detecting value 11 detected by a room temperature detecting means 1 and an open air temperature detecting value 31 detected by an open air temperature detecting means 3 are inputted to a room temperature comparing means 21 and an open air temperature comparing means 22, respectively. The room temperature detecting value 11 is compared with a room temperature reference value Ti by the room temperature comparing means 21, and if the room temperature detecting value 11 is below the Ti, maximum operation frequency instruction is set to Fmax. When the room temperature detecting value 11 exceeds the Ti, the open air temperature detecting value 31 is compared with an open air reference value To by the open air temperature comparing means 22, and when the open air detecting temperture 31 exceeds the To, maximum operation frequency instruction is set to FH, and when below the To, the maximum operation frequency instruction to Fmax. With this, if an open air temperature is below the To even when a room temperature exceeds the Ti during heating operation, the maximum operation frequency is adjusted to the Fmax, and this enables provision of maximum heating capability.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a control device for determining the maximum operating frequency of a variable capacity air conditioner.

BACKGROUND OF THE INVENTION In recent years, variable capacity air conditioners have become increasingly popular, and various control devices have been devised to optimally operate them.

An example of the above-mentioned air conditioner control device will be described below with reference to the drawings.

FIG. 4 is a configuration diagram of a conventional maximum operating frequency control device for a variable capacity air conditioner.

In the figure, 1 is a room temperature detection means, 11 is a room temperature detection value,
2 is maximum operating frequency determining means, 21 is room temperature comparison means,
The room temperature detection value 11 detected by the room temperature detection means 1 and the room temperature reference value Ti are compared by the room temperature comparison means 21, and based on the comparison, the maximum operation frequency determination means 2 issues the maximum operation frequency instruction.

The operation of the air conditioner control device configured as described above will be described below.

First, during heating operation of a variable capacity air conditioner, the search power key ≠
It can be compared with the standard room temperature value Ti.

At this time, conventionally, as shown in FIG. 5, if the room temperature is below Ti, the maximum operating frequency is controlled to be FH if it is above Fmax 1T i. Here, FH is the operating frequency at which the air conditioner exhibits standard performance during heating operation, and is determined by taking into consideration that the operating current does not exceed the limit value even when the room temperature and outside temperature are high, so-called heavy loads. It is something that Furthermore, Fmax is the operating frequency at which the air conditioner exhibits its maximum capacity (for example, JP-A-58-228
Publication No. 724).

Problems to be Solved by the Invention In the above configuration, only the room temperature is detected, so even when the outside temperature is low, if the room temperature is Ti or higher, the maximum operating frequency is FH.

However, when the outside temperature is low, the load is light and the operating current is reduced, so it is possible to operate at a higher frequency, and conventional control devices have the problem of not being able to fully utilize the air conditioner's capacity. Ta.

In view of the above-mentioned problems, the present invention detects room temperature and outside temperature and determines the maximum operating frequency from both.
The present invention provides a control device that more effectively utilizes the capabilities of the air conditioner.

Means for Solving the Problems In order to solve the above problems, the air conditioner control device of the present invention includes detection means for detecting room temperature and outside temperature, detection means for detecting these detected values, a room temperature reference value, and an outside temperature reference value. The apparatus is equipped with means for determining the maximum operating frequency of an air conditioner, which has a comparison means for comparing the values.

Effect of the present invention With the above-described configuration, during heating operation of the variable capacity air conditioner, if the outside temperature is low even if the room temperature is T1 or higher, this is detected by the outside temperature detection means, the maximum operating frequency is set to Fmax, and the maximum heating is performed. You will gain abilities.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of an air conditioner control device in an embodiment of the present invention.

In FIG. 1, 1 is a room temperature detection means, 11 is a room temperature detection value, 2 is a maximum operating frequency determining means, 21 is a room temperature comparison means,
22 is an outside temperature comparison means, 3 is an outside temperature detection means, and 31 is an outside temperature detection value. The room temperature detection value 11 and the room temperature reference value Ti are compared by the room temperature comparison means 21, and the outside temperature detection value 31 and the outside temperature reference value TO are compared by the outside temperature comparison means 22, and based on this, the maximum operating frequency determination means 2 determines the maximum operating frequency. It issues an operating frequency instruction.

The operation of the air conditioner control device configured as described above will be described below with reference to FIGS. 1 to 3.

First, Figure 2 shows the relationship between the room temperature, outside temperature, and maximum operating frequency during heating operation.When the room temperature is T1 or higher and the outside temperature is To or higher, the maximum operating frequency is FH. In other cases, Fmax is set.

FIG. 3 is a determination flowchart of the maximum operating frequency determining means 2 during heating operation. The operation will be explained below based on the flowchart.

First, the room temperature detected by the room temperature detection means 1 is detected.

Next, the detected room temperature value 11 is compared with the room temperature reference value Ti by the room temperature comparison means 2.
1 and if the detected room temperature value 11 is less than or equal to Ti, the maximum operating frequency instruction is set to Fmax.

Further, if the detected room temperature value 11 is more than Ti, the detected outside temperature value 31 is further compared with the outside temperature reference value To by the outside temperature comparison means 22, and if the detected outside temperature value 31 is 10 or more, the maximum operating frequency instruction is set to FH. , To, it is set as Fmax.

As described above, according to this embodiment, by providing the room temperature and outside temperature detection means, the room temperature and outside temperature comparison means, and the maximum operating frequency determination means, even if the room temperature is T1 or higher during heating operation, the outside temperature If is less than To, the maximum operating frequency becomes Fmax, and the maximum heating capacity can be obtained.

Effects of the Invention As described above, the present invention provides a room temperature detection means, an outside temperature detection means, and a maximum operating frequency determining means having a comparison means for comparing these detected values with respective reference values. Even if the room temperature is above the room temperature reference value T1, if the outside temperature is below the outside temperature reference value To, the maximum operating frequency is set to Fmax, and the maximum heating capacity can be obtained at low outside temperatures.

[Brief explanation of drawings]

Fig. 1 is a block diagram of the maximum operating frequency control device during heating operation of an air conditioner according to an embodiment of the present invention, and Fig. 2 shows room temperature, outside temperature, and maximum operating frequency during heating operation of an air conditioner according to an embodiment of the present invention. FIG. 3 is a flowchart for determining the frequency of the maximum operating frequency determining means in FIG. 1, FIG. 4 is a block diagram of the maximum operating frequency control device during heating operation of a conventional air conditioner, and FIG. FIG. 2 is a diagram showing the relationship between room temperature, outside temperature, and maximum operating frequency during conventional heating operation. 1...Room temperature detection means, 2...Maximum operating frequency determination means, 3...Outside temperature detection means, 21
. . . Room temperature comparison means, 22 . . . Outside temperature comparison means. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 1 - Senon Sode Tateyaku Figure 2 Figure 3

Claims (1)

[Claims] A room temperature comparison that compares a control device that controls the operation of a variable capacity air conditioner with a room temperature detection means, an outside temperature detection means, and each detection value obtained from the detection means with a room temperature reference value and an outside temperature reference value. 1. A control device for an air conditioner, comprising: a means for comparing an air conditioner, an outside temperature comparing means, and a maximum operating frequency determining means for determining a maximum operating frequency of the air conditioner based on these signals.