JP3102236B2 - Air conditioner forced operation control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forced operation control device for an air conditioner which performs a forced operation in a test operation or the like.

[0002]

2. Description of the Related Art Conventionally, as a forced operation control device for an air conditioner, as shown in FIG. 4, a control board 41 for controlling an indoor unit (not shown) and an outdoor unit (not shown) is provided. There is. The control board 41 is connected to a commercial power supply 40, and includes a microcomputer (hereinafter referred to as a microcomputer) 41a for controlling the indoor unit and the outdoor unit, and a microcomputer 4a.
1a, a remote controller input terminal 41b for connecting a remote controller (hereinafter referred to as a remote controller) 42 for setting operation commands, room temperature values and the like of the indoor unit and the outdoor unit, and forced cooling operation, forced heating operation and normal operation to the microcomputer 41a. A control input terminal 41c for inputting an operation control signal representing any one of the operations. A switch unit 43 provided in an outdoor unit (not shown) is connected to the control input terminal 41c. As shown in FIG. 5, the switch section 43 can be operated in three ways: a “forced heating” selection position 51, a “forced cooling” selection position 52, and a “normal” selection position 53. A slide-type operation switch 50 is provided, and the operation switch 50 is connected to the control input terminal 41 c of the control board 1. When the operation switch 50 is switched to the selection position 51 of "forced heating" or the selection position 52 of "forced cooling" in a test operation after pump-down or installation of the air conditioner, forced operation is started. Then, the operation switch 5 of the switch section 43
When the “0” is switched to the “normal” selection position 53, the forced operation is stopped, and then the operation is returned to the normal operation.
The normal operation can be performed by the operation 2.

[0003]

However, when the air conditioner is manufactured, the operation switch 50 of the switch unit 43 is erroneously operated to switch to the selection position 51 of "forced heating" or the selection position 52 of "forced cooling". There is a problem that they are shipped as they are. Then, after the air conditioner is handed over to the end user, the cooling operation or the heating operation cannot be performed. When such a situation occurs, the countermeasure takes much time and effort, and the reliability of the product is seriously affected.

After performing a trial operation at the time of installation, the operator forgets to reset the operation switch 50 of the switch section 43, that is, to switch the operation switch 50 to the "normal" selection position 53, and to operate the remote controller 42 by operating the remote controller 42. There is a problem that can not be. Also in this case, the failure has a serious effect on the reliability of the product.

Therefore, an object of the present invention is to automatically return to normal operation even if the forced operation is performed before shipment or if the forced operation is performed during a test run at the time of installation, and the forced operation is not reset. It is an object of the present invention to provide a forced operation control device for an air conditioner that can prevent the occurrence of a forced operation.

[0006]

In order to achieve the above object, a forced operation control device for an air conditioner according to a first aspect of the present invention includes a forced operation switch for commanding a forced cooling operation or a forced heating operation, and the forced operation switch. When the forced cooling operation or the forced heating operation is commanded, it is determined whether or not the first time has been measured by the time measuring means for starting time measurement and the first time by the time measuring means. When it is determined that the time has been measured, the first operation of stopping the forced cooling operation or the forced heating operation and returning to the normal operation is performed.
Time determination determination means, forced operation stop command means for stopping forced operation during the forced cooling operation or the forced heating operation, and determining whether a forced operation stop command is issued by the forced operation stop command means. When the stop command determining means and the stop command determining means determine that the forced operation stop command has been issued, it is determined whether or not a second time shorter than the first time has been measured by the timing means. When the means determines that the second time has been measured, the forced cooling operation or the forced heating operation is stopped, and second time measurement determination returning means for returning to normal operation is provided. .

[0007]

According to the forced operation control device for an air conditioner of the first aspect, when the forced cooling operation or the forced heating operation is instructed by the forced operation switch, the time counting means starts counting time. If the first time measurement determination and return means determines that the time measurement means has measured the first time, the forced cooling operation or the forced heating operation is stopped,
Return to normal operation. On the other hand, if the first time counting determination and return means determines that the time counting means has not counted the first time, the forced cooling operation or the forced heating operation is continued.

As described above, after the forced cooling operation or the forced heating operation is started, when the first time elapses,
The normal operation is automatically returned from the forced operation state. Therefore, at the time of inspection, the forced operation switch is set to the forced operation state to perform the forced cooling operation or the forced heating operation, and then, even if the forced operation switch is forgotten and the forced operation state is set, the normal operation is automatically performed. Can be prevented from being shipped with the forced operation switch in the state of the forced operation command at the time of shipment. Also,
After the forced operation at the time of test operation or inspection after installation, forgetting to reset the forced operation switch can be prevented.

When a forced operation stop command is issued by the forced operation stop command means during the forced cooling operation or the forced heating operation, the stop command determination means determines that the forced operation stop operation has been performed, and Even if the first time has not elapsed, the operation is returned to the normal operation.

In this way, if the forced operation stop command is issued by the forced operation stop command means from the start of the forced cooling operation or the forced heating operation to the time measurement of the first time by the time measuring means, the normal operation is started. Since the operation is restored, the operation can be returned to the forced operation without waiting for the time measuring means to measure the first time. As described above, since the normal operation can be returned without waiting for the end of the first time measurement during the forced operation, even if the forced operation is performed due to an erroneous operation, the operation can be immediately canceled.

However, when the stop command determining means determines that the forced operation stop command has been issued, the second time determination determining and returning means determines that the second time shorter than the first time has been measured. When the forced cooling operation or the forced heating operation is stopped and the operation is returned to the normal operation, the second timing determination and return unit determines that the forced cooling operation is not performed for the second time. Continue the operation or forced heating operation.

As described above, during the forced cooling operation or the forced heating operation, even if the forced operation stop command is issued before the time measurement of the first time is completed, the time measuring means measures the time of the second time. Until the operation is completed, the operation cannot be returned to the normal operation. Therefore, when the forced operation is started, a time for checking the matching between the pipe and the wiring is always secured.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an air conditioner forced operation control apparatus according to the present invention will be described in detail with reference to an embodiment.

FIG. 1 is a block diagram of a forced operation control device for an air conditioner according to an embodiment of the present invention. Reference numeral 1 denotes a control board connected to a commercial power supply 10 and disposed in an indoor unit (not shown); Is a remote controller connected to a remote control input terminal 1b provided on the control board 1; a remote controller for setting an operation command and a room temperature value of an indoor unit and an outdoor unit (not shown); and 3, a control input terminal 1c provided on the control board 1. And a switch unit for instructing a forced cooling operation and a forced heating operation. The switch unit 3 is provided in an outdoor unit (not shown).

As shown in FIG. 2A, the switch section 3 includes a push button switch 21 for "forced cooling" and a push button switch 22 for "forced heating". And constitute an example of the forced operation switch. The push button switches 21 and 22 also serve as forced operation stop command means for stopping forced operation.
During forced cooling, push button switch 21 for "forced cooling"
Is operated again, and at the time of forced heating, the forced operation stop command is issued by operating the push button switch 22 for "forced heating" again to return. An operation stop switch (not shown) may be provided near the switch unit 3 as the forced operation stop command means. Further, the status of the forced operation is confirmed by a display unit (not shown) for performing the cooling / heating display during the normal operation.

Further, with the microcomputer 1a for the control board 1, the microcomputer 1a is, counting the first timer TM ₁ and the second time t ₂ to time the first time t ₁ (<t ₁₎ And a second timer TM ₂ that performs
Constitute an example of timing means by M ₁ and the second timer TM _2. The second time t ₂ is a time slightly longer than the time for checking the matching between the pipe and the wiring. Also,
The microcomputer 1a includes first time determination return means, stop command determination means, and second time determination return means constituted by software. The first timing determination return means, it is determined whether the first time t ₁ of the first timer TM ₁ is completed, the first time t ₁ of the first timer TM ₁ is terminated If it is determined that the operation has been performed, the forced operation is stopped and the operation is returned to the normal operation. Further, the stop command determining means determines whether or not a forced operation stop command is issued by the push button switches 21 and 22 of the switch unit 3 after the start of the forced operation. Further, the second timing determination and return unit may include:
If it is determined that the stop command determination means is forced operation stop command, to determine whether the second time t ₂ of the second timer TM ₂ is finished, the second timer TM ₂ second 2
Stop the forced operation when the time t ₂ has been finished, and so that to return to normal operation.

In the forced operation control device for an air conditioner having the above configuration, the microcomputer 1a operates according to a flowchart shown in FIG. During the forced operation, the remote controller 2 cannot perform the normal operation.

First, when the power supply 10 is turned on, it is checked in step S1 whether a forced operation (cooling or heating) operation is being performed. That is, the push button switch 21 for “forced cooling” is pressed by the switch unit 3 or the push button switch 2 for “forced heating”
It is checked whether or not 2 is pressed. And
If the switch unit 3 has not been operated for forced operation in step S1, that is, if the push button switch 21 or the push button switch 22 has not been pressed, the process proceeds to step S6, in which normal operation processing is performed. On the other hand, if the operation of the switch unit 3 is forcibly operated in step S1, that is, if the push button switch 21 or the push button switch 22 is pressed, the process proceeds to step S2.

Then, in step S2, the first timer TM
₁ and the start of the second counting of the timer TM _2, step S3
The forcible operation is performed after forcibly switching the four-way switching valve of the outdoor unit (not shown) to the cooling position or the heating position.

Thereafter, it is checked in step S4 whether the forced operation has been stopped. If the forced operation has been stopped, that is, if the push button switch 21 or the push button switch 22 of the switch section 3 is reset. If the operation has returned, the process proceeds to step S7, whereas if the operation for stopping the forced operation has not been performed, the process proceeds to step S5.

[0021] Next in is from the forced operation begins at step S5 of the first timer TM ₁ confirms whether or not it is completed to the first count of the time t _1. Then, the elapsed time t from the forced driving started in step S5 is in the case of t ₁ following the first time, the process returns to step S3, and continues the forcible driving process. On the other hand, the elapsed time t after the start of the forced operation in step S5 is the first time.
If the value exceeds the time t _1, as well as to stop the forced operation, and returns to normal operation, the process proceeds to step S6, performs the process of normal operation.

Further, it is from the forced operation begins at step S7 the second timer TM ₂ confirms whether or not it is completed to the second counting time t _2. Then, the elapsed time t from the forced operation start in step S7 in the case of t ₂ following the second time, the process returns to step S3, and continues the forcible driving process. On the other hand, along with the elapsed time t from the forced driving started in step S7, if it exceeds t ₂ a second time to stop the forced operation, and returns to normal operation, the process proceeds to step S6, the process of normal operation Do.

[0023] Thus, after the forced operation start, the first time t ₁ of the first timer TM ₁ has elapsed, the automatic return to normal operation, push button switch 21 of the switch unit 3 during inspection , 22 and forgetting to return to the normal operation in the forced operation state, the shipment does not enter the forced operation state. In addition, when a push-button switch 21 for “forced cooling” or a push-button switch 22 for “forced heating” of the switch unit 3 is operated at the time of a trial operation or an inspection after installation, the push-button switch 21 Alternatively, forgetting to reset the push button switch 22 can be prevented.

If the forced operation is stopped before the first time t ₁ of the first timer TM ₁ expires during the forced cooling operation or the forced heating operation, the forced cooling operation or the forced heating operation is stopped. Thus, even if the push button switch 21 for “forced cooling” or the push button switch 22 for “forced heating” of the switch unit 3 is erroneously operated, the second timer TM _If the second time t2 of ₂ has ended, the forced operation can be stopped immediately.

Further, in a trial operation or an inspection after the installation, the forced operation is not stopped even if the forced operation stop operation is performed by the time the second time t ₂ of the second timer TM ₂ ends. Therefore, at least until the _second time t2 elapses from the start of the forced operation, the time for checking the matching of the piping and wiring of the air conditioner can be secured.

[0026] Incidentally, depending on conditions such as the length and thickness of the piping of the air conditioner, as a forced operation time during pump-down to collect refrigerant, a first time t ₁ of the first timer TM ₁ is sufficiently If not, the forced operation is performed by operating the push button switch 21 or the push button switch 22 of the switch unit 3 again.

In the above embodiment, the air conditioner which performs the cooling operation and the heating operation is used, but the air conditioner which performs either the cooling operation or the heating operation is forcibly operated by the air conditioner of the present invention. A control device may be applied.

Further, in the flowchart of FIG. 3, if the stop operation of the forced operation is in step S4, the process proceeds to step S7, the second timer TM ₂ is the second time t ₂
Although it has been confirmed whether or not the time measurement has been completed, step S7 may be omitted, and the process may immediately proceed to step S6 to return to the normal operation.

Further, although the push button switch 21 and the push button switch 22 shown in FIG. 2A are used for the switch section 3 as the forced operation switch, the forced operation switch is not limited to this, and FIG. As shown, a slide switch 25 having a "forced cooling" selection position 27 and a "forced heating" selection position 28, and a push button switch for commanding the forced cooling operation or the forced heating operation selected by the slide switch 25 26 may be combined.

Although the status of the forced operation is displayed using a display unit (not shown) for performing the cooling / heating display during the normal operation, a push button switch with a display LED may be used as the forced operation switch. A display LED or the like for displaying the status of the forced operation may be provided near the forced operation switch.

[0031]

As is apparent from the above description, the forced operation control device for an air conditioner according to the first aspect of the present invention instructs forced cooling operation or forced heating operation by a forced operation switch, and the forced operation switch by the forced operation switch. When the cooling operation or the forced heating operation is instructed, the time counting means starts time counting, and the first time counting determination and return means determines whether or not the first time counting means has timed the first time. Means first
When it is determined that the time has been measured, the forced cooling operation or the forced heating operation is stopped to return to the normal operation, and the forced operation stop command means performs the forced operation during the forced cooling operation or the forced heating operation. Command to stop,
The stop command determining means determines whether or not the forced operation stop command has been issued by the forced operation stop command means. If the stop command determining means determines that the forced operation stop command has been issued, Determining whether a second time shorter than the first time has been measured by the time-measuring means, and performing a forced cooling operation or a forced heating operation when the time-measuring means determines that the second time has been measured. Is stopped to return to normal operation.

Therefore, according to the forced operation control device for an air conditioner of the first aspect of the invention, the forced cooling operation or the forced heating operation is commanded by the forced operation switch, and the forced cooling operation or the forced heating operation is started. When the timer measures the first time, the forced cooling operation or the forced heating operation is stopped and the operation returns to the normal operation. Therefore,
Operate the forced operation switch to the forced operation state during inspection,
After performing the forced cooling operation or the forced heating operation, even if the user forgets to switch the forced operation switch and is in the forced operation state, the system can automatically return to the normal operation.
It is possible to prevent the forced operation switch from being shipped with the forced operation command. Further, after performing the forced operation at the time of the test operation or the inspection after the installation, it is possible to prevent the forced operation switch from being forgotten to be reset.

When a forced operation stop command is issued by the forced operation stop command means during the forced cooling operation or the forced heating operation, the stop command determining means determines that the forced operation stop operation has been performed, and measures the time. Since the normal operation is resumed without waiting for the means to measure the first time, the forced operation can be canceled immediately even if the operation is forced due to an erroneous operation.

When the stop command judging means judges that the forced operation stop command has been issued, the second timed judgment judging / returning means judges whether the forced cooling operation or the forced cooling operation has been performed when it is judged that the second time has been measured. Stop the heating operation and return to normal operation. Therefore, even if a forced operation stop command is issued during the period from the start of the forced cooling operation or the forced heating operation to the timing of the first time by the timing unit, the timing of the second time is terminated by the timing unit. Until the normal operation is resumed, the forced cooling operation or the forced heating operation can always be ensured as a check time for the matching of pipes and wiring when the forced cooling operation or the forced heating operation is started.

[Brief description of the drawings]

FIG. 1 is a block diagram of a forced operation control device for an air conditioner according to the present invention.

FIG. 2 (a) is a front view of a switch of the forced operation control device for the air conditioner, and FIG. 2 (b) is a front view of a switch of another example of the forced operation control device for the air conditioner. FIG.

FIG. 3 is a flowchart showing an operation of a microcomputer of the forced operation control device.

FIG. 4 is a block diagram of a conventional forced operation control device for an air conditioner.

FIG. 5 is a front view of a switch of the forced operation control device.

[Explanation of symbols]

1 ... control board, 1a ... microcomputer, 1b ... remote control input terminal, 1c ... control input terminal, 2 ... remote controller, 3 ... switch unit, 10 ... utility power, TM ₁ ... first timer, TM ₂ ... second timer .

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Keiya Sato 1000-2 Oya, Okamoto-cho, Kusatsu-shi, Shiga 2 Daikin Industries, Ltd. Shiga Works (58) Field surveyed (Int. Cl. ⁷ , DB name) F24F 11/02

Claims (1)

(57) [Claims] When a forced cooling operation or a forced heating operation is instructed by a forced operation switch (21, 22) for instructing a forced cooling operation or a forced heating operation, and and timer means starts clocking (TM _1, TM _2), it is determined whether the timed said clock means (TM _1, TM ₂₎ by a first time (t _1), the time measuring means (TM ₁ , T
If M ₂₎ is judged to have timed the first time (t _1), to stop the forced cooling operation or the forced heating operation, the first timing determination return means for returning to the normal operation (S
5), a forced operation stop command means (21, 22) for stopping the forced operation during the forced cooling operation or the forced heating operation, and a forced operation stop command by the forced operation stop command means (21, 22). Stop command determining means for determining whether or not the
(S4), when the stop command determination means (S4) determines that the forced operation stop command has been issued, the _second time shorter than the first time (t ₁ ) by the time counting means (TM ₁ , TM ₂ ). It is determined whether or not the time (t ₂ ) has been measured, and when the timing means (TM ₁ , TM ₂ ) determines that the second time (t ₂ ) has been measured, the forced cooling operation or the forced cooling operation is performed. A forced operation control device for an air conditioner, comprising: second timed determination return means (S7) for stopping heating operation and returning to normal operation.