JPH07243729A - Refrigeration unit - Google Patents

Abstract

(57) [Summary] [Configuration] In the microcomputer 1 and the memory 2, if the initial setting value is required depending on the content of the information of whether the initial setting value is set or not in the data of the memory 2, the initial setting value is automatically set. Set.
A control device that resets the setting value by changing the information of whether or not to set the initial setting value of the memory 2 with an external switch even after the setting value is changed. [Effect] Without entering the initial setting value each time the operation is started,
Even after changing the set value, you can easily reset the initial set value. Further, even if the memory contents are destroyed or lost due to some circumstances, the memory contents can be judged after the power is turned on and the initial setting value can be set, and the operation of the device under abnormal conditions can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control function for a refrigerating unit having a microcomputer, wherein a plurality of set values can be changed and an initial set value is automatically set.

[0002]

2. Description of the Related Art In a refrigeration unit, a microcomputer is not used and automatic setting cannot be performed.

As a similar control system, there is a remote controller for an air conditioner, but in that case, when the power is turned on, only the standard temperature is set with the set temperature as the initial setting value (Hitachi building multi-air conditioner "set free FX, FS" catalog). .

[0004]

In order to operate the refrigerating unit, it is necessary to input various set values such as the inside temperature, the alarm temperature, and the defrosting time. Further, there is a problem that the initial set values are not known when it becomes necessary to restore the initial set values again after changing these set values according to the operating conditions.

An object of the present invention is to provide a control system which automatically initializes a plurality of set values when the power is turned on and resets the set values even after the setting is changed.

Furthermore, if the contents of the memory that stores various set values are destroyed or lost (due to the consumption of the backup battery, etc.), when the power is turned on again and the operation is resumed, the set values become abnormal and the device becomes abnormal. I was afraid to drive.

[0007]

[Means for Solving the Problems] The above problem is to determine the contents of memory data when the power is turned on, write the initial set value when the data is lost or completely used for the first time, and restore the initial set value after changing the set value. To return, the content of the memory data is changed by pressing the external switch, and it is solved by writing the initial setting value.

[0008]

[Operation] It is necessary to set an initial setting value in a part of the memory data,
It becomes possible to give information for judging whether or not to judge the contents, and change it to the initial setting value. Further, since this information is constantly checked during the operation of the refrigeration unit, each set value can be changed unless it is determined that the initial set value needs to be set. Then, by pressing the external switch, it becomes necessary to set the initial setting value, so that it is possible to change the initial setting value even after the operation.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a block diagram of the control device. FIG. 2 shows a flowchart when the power is turned on and the microcomputer starts from the reset state. FIG. 3 shows a flowchart for changing the set value and resetting to the initial set value. Figure 1
The block diagram shown in Figure 1 is a microcomputer 1, a memory that stores and retains information about whether or not to set various setting values and initial setting values, not only when the power is turned on, but also when there is a power failure. 2 A reset circuit that starts the microcomputer from the reset state. 3, a display unit for displaying various setting values, a setting switch for inputting the setting values, and a setting initialization switch 6 for initializing the setting values. The operation will be described below.

When the power is turned on, the microcomputer operates according to the flowchart of FIG. After executing the reset process, check the contents of the memory data. This is two values of "55H" and "00H" as information indicating whether or not to set the initial setting value. If "55H", the setting is not necessary, and "00H".
If so, distinguish it from the setting required. Therefore, if the content of the memory data is "55H", do not change the setting value to the initial setting value, and proceed to the setting value changing process with the setting switch 5. Then, each can be changed by the setting switch 5, and each set value in the memory 2 is changed. on the other hand,
In the case of "00H", "55H" is written in the memory data as information indicating whether or not it is necessary to set the initial setting value, and then all the initial setting values are automatically set in the memory 2.

When the power is turned on at the start of operation, the program of this apparatus is always processed according to the flow chart of FIG. 2. Therefore, when the memory contents including various set values are destroyed or lost due to some reason (the information indicating whether or not the setting is necessary). (If it changes to a value other than "55H"), it is automatically set again to the initial setting value, so that it is possible to prevent the apparatus from setting an abnormal setting value. That is, abnormal operation of the device can be prevented.

Next, a method of resetting all the set values to the initial set values during or after the operation will be described with reference to the flowchart of FIG. When the setting initialization switch 6 is pressed, "00H" is written in the memory data as information indicating whether or not it is necessary to set the initial setting value of the memory data, and then the memory data "55H" or "00H" similar to the processing of FIG. ", And all the set values are rewritten to the initial set values.

[0013]

According to the present invention, when the memory is first used, the initial setting can be automatically performed according to the application, and even after the setting value is changed, it can be automatically returned to the initial setting value by the input of the external switch.

[Brief description of drawings]

FIG. 1 is a block diagram of a control device of the present invention.

FIG. 2 is a flowchart of the present invention.

FIG. 3 is a flowchart of the present invention.

[Explanation of symbols]

1 ... Microcomputer, 2 ... Memory, 3 ... Reset circuit, 4 ... Display part, 5 ... Setting switch, 6 ... Setting initialization switch.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Watanabe 390 Muramatsu, Shimizu City, Shizuoka Prefecture Hitachi Ltd. Air Conditioning Systems Division

Claims (1)

[Claims] 1. A refrigerating unit comprising a plurality of setting switches and a display unit, wherein each setting value required for operation is controlled by a memory and a microcomputer which retains a memory when power is cut off.