JPS6033211B2 - Air conditioning equipment automatic inspection device with function to prevent erroneous operation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic inspection device for air conditioning equipment that is activated by operation of a test switch to automatically inspect air conditioning equipment equipped with an arithmetic control device, and particularly for general use of air conditioning equipment. This is to prevent the occurrence of danger due to unauthorized operation of the test switch by a person.

In general, air conditioning equipment always has a compressor, regardless of whether it is a dedicated cooling unit or a dual-purpose cooling/heating unit. It is designed to control the on/off of the compressor based on the

Therefore, even when testing the operation of a compressor when installing air conditioning equipment, the compressor will not operate unless the room temperature reaches an appropriate temperature, making it impossible to perform the test immediately. Therefore, it is customary to provide air conditioning equipment with a test switch that allows the compressor to operate and perform tests regardless of the room temperature. On the other hand, once the compressor installed in the air conditioner is turned off, even if you try to turn it on again when the cold soot inside has not yet cooled down, it will not be able to start.
There is a risk of large current flowing.

In order to prevent such a risk from occurring, it is common practice to prevent the compressor from being started for about three minutes after it is turned off. Therefore, the above-mentioned test switch loses its meaning unless it is made possible to immediately perform a test by starting the compressor by ignoring such start-up operation disabled processing. Therefore, if the test switch is operated, a large current may be generated due to the above-described inability to start the compressor, so incorrect operation of this type of test switch by a general air conditioner user is extremely dangerous. As a measure to prevent such erroneous operation of the test switch, it is possible to install the test switch inside the lotus body of the air conditioner so that it cannot be operated by general air conditioner users. This increases the burden on service personnel who install and adjust air conditioning equipment because they have to operate switches.

Furthermore, there is a possibility that the service person forgets to turn off the test switch after the test and leaves it in the on state. The purpose of the present invention is to eliminate the above-mentioned drawbacks of the conventional technology, to enable tests to be carried out safely and immediately when necessary without requiring particularly troublesome operations, and to eliminate the risk of accidental detonation by general users. An object of the present invention is to provide an automatic inspection device for air conditioners having a function of preventing operation at a low cost as a consumer device.

That is, the automatic inspection device for air conditioners of the present invention is an automatic inspection device that is activated by operation of a test switch to automatically inspect air conditioners, when the air conditioners are in operation or after the air conditioners have started operating. A determining means for determining and outputting a time within a predetermined time, and a control means for performing the automatic inspection by detecting that the test switch changes from a non-operated state to an operated state at the time of output from the determining means. . The present invention will be described in detail below with reference to the drawings.

First, FIG. 1 shows an example of the basic configuration of an air conditioner exclusively for cooling equipped with an automatic inspection device according to the present invention.

An arithmetic and control unit 1 serves as the center of control for the air conditioner with the illustrated configuration, and a control switch group 6 gives instructions for required operations to the arithmetic and control unit 1. For example, once the operation switch in the control switch group 6 is turned on, the air conditioning equipment is put into operation and the operation indicator light (not shown) lights up, so that other control functions such as the automatic operation switch and the ventilation operation switch are turned on. The desired operating mode is instructed by the setting state of the switch. Therefore, when the cooling operation is instructed, the voltage corresponding to the set resistance value of the temperature setting resistor 8 is changed to A.
- An output relay is supplied to the D conversion circuit 5 to start the cooling compressor if the room temperature is higher than the set temperature based on the set resistance value and the resistance value of the temperature sensor thermistor 7. Activate the combustible relay in group 4. Further, the indoor fan motor is controlled to switch between high speed, medium distance, and low speed depending on the temperature difference between the room temperature and the set temperature. Regarding the room temperature, the arithmetic and control device 1 detects the room temperature via the temperature sensor thermistor 7, and displays the detected room temperature by selectively lighting the display lamp group 3. . Note that the display lamp is shown as a light emitting diode in the figure. In addition, since the output power is insufficient to drive the display lamp group 3 or the sword output relay group 4 with the output value of the arithmetic and control device 1 as it is, an amplifier circuit 2 is inserted. . In order to test run the air conditioner operated with the above-described configuration, a test switch provided in the control switch group 6 is used. By turning on this test switch, for example, the following occurs. Provides inspection functions.

{1} As the original so-called test run function, the cooling mode is also operated, and the compressor is allowed to operate unconditionally, and at that time, as mentioned above, "compressor restart is prohibited for 3 minutes after stopping. Release the lock function.

In addition, such continuous operation shall be performed for 15 minutes, and after the 15 minutes of continuous operation, the mode shall be set to stop [2]
As a test function for the timer function that automatically turns on and off the operation, the count speed of the timer is increased by 100 times. For example, in response to a case where the timer is set to turn off after one hour, the time setting state of the timer action by the arithmetic and control unit, which is set to turn off after three hours, is inspected. Glue As a test function for the operation of the A-D conversion circuit 5 that supplies the detected output voltage of the thermistor 7 for temperature sensor to the arithmetic and control unit 1, the display lamp group 3 displays the digital signal of the A-D conversion output in the form of a bit display. The bit whose display lamp is lit is set to "1", and the bit whose display lamp is not lit is set to "0".

Regarding this inspection function, in order to prevent misuse, only three switches used for other purposes must be turned on at the same time, so that the inspection is not performed. However, as mentioned above, if the test switch that activates the various inspection functions is operated incorrectly,
There is a risk that the air conditioner itself may malfunction, and there is also a risk that the user may conclude that there is an abnormality in the operation of the air conditioner. Although it is desirable to install the test switch in a location where it cannot be operated, it is not preferable to install the test switch in a hidden position because it increases the burden on the service personnel who operate the test switch and perform the actual inspection.

In contrast, in the present invention, on the premise that the test switch is provided in a position that can be operated by general users, the following safety measures to prevent erroneous operation will be explored.

Note that even if the test switch is provided at a position that can be operated by a single user, it is of course necessary to provide it at a position distinct from other normal control switches. {1}
By turning on the test switch only when the air conditioner is in operation, the air conditioner can be brought into the test condition.

{2) Even if the test switch is turned on in advance when the air conditioner is in a stopped state and the air conditioner starts operating, it will not enter the test state but will immediately return to the normal operating state.

'3' When in the inspection state, the display lamp blinks to indicate that the air conditioner is in operation.

Incidentally, instead of (1-) mentioned above, the following can also be used.

{1}' After the air conditioner starts operating, it will enter the inspection state only if you turn on the test switch within one second, for example, and it will not enter the inspection state even if you turn on the test switch after that one second has passed. do it like this.

By setting the inspection program for the air conditioner configured as shown in Fig. 1 according to the flowchart shown in Fig. 2, the various inspection functions described above can be easily realized, and the test switch design can be easily realized. There is no need to provide another switch to prevent troubles caused by operation, and there is no increase in manufacturing costs.

Further, in order to prevent forgetting to turn off the test switch, a warning may be given by flashing an operation indicator lamp or the like.

As is clear from the above description, according to the present invention, failures in air conditioning equipment due to misoperation of the test switch due to mischief by general users or forgetting to turn off the test switch by service personnel, etc. It can be reliably and easily prevented without any incident, making it the optimal safety measure.Furthermore, the status of the inspection can be easily determined by the flashing of an indicator lamp used for other purposes. , it can be an automatic inspection device that is most suitable for so-called electronically controlled air conditioners.

Although the automatic inspection device of the present invention is mainly intended for application to so-called room coolers as electronically controlled consumer air conditioners, it can also be applied to other consumer air conditioners having similar air conditioners, such as clean heaters. The same effect can be obtained by applying the method to

[Brief explanation of the drawing]

FIG. 1 is a Brolock diagram showing an example of the configuration of an air conditioner to which the automatic inspection device of the present invention is applied, and FIG. 2 is a flowchart showing an example of the inspection mode. 1... Arithmetic control unit, 2... Amplification circuit, 3
・・・・・・Display lamp, 4：Output relay, 5：A-D conversion circuit, 6：Control switch, 7：・・・Thermistor for temperature sensor,
8...Temperature setting resistor. Figure 1 Figure 2

Claims (1)

[Scope of Claims] 1. In an automatic inspection device that is activated by operation of a test switch and automatically inspects air conditioners, when the air conditioner is in operation or within a predetermined time after the air conditioner starts operating. It is characterized by comprising a discriminating means for discriminating and outputting a certain time, and a control means for detecting that the test switch changes from a non-operating state to an operating state at the time of output from the discriminating means, and performs the automatic inspection. An automatic inspection device for air conditioning equipment that has a function to prevent erroneous operation. 2. In the automatic inspection device according to claim 1, the control means controls a display that indicates that the air conditioner is in an operating state to blink when the air conditioner is in the automatic inspection state. 1. An air conditioner automatic inspection device having a function of preventing erroneous operation, characterized by having a display means for displaying.