JPH0213872Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a window-type air conditioner in which the window at the back of the outdoor side can be opened and closed.

[Technical background of the invention and its problems]

Currently, there is an increasing number of window-type air conditioners that have indoor and outdoor sides separated internally and are attached to a window so that the window can be opened and closed. When such a window-type air conditioner is not being operated, the window on the back of the air conditioner can be easily closed, and the conventional lock on the window can be used, which is very convenient. It is something.

However, in such a window-type air conditioner, since the window can be easily opened and closed, the user may mistakenly operate the air conditioner with the window behind the air conditioner closed.

If you operate the air conditioner with the back window closed in this way, an abnormal load will be applied to the compressor, which may cause the refrigeration cycle equipment and electrical components to malfunction, or the room will not cool even when the air conditioner is running. A problem was occurring.

[Purpose of invention]

This invention was made taking the above circumstances into consideration.
To provide a window-type air conditioner that detects operation of the air conditioner with the rear window closed.

[Summary of the idea]

This invention is a window type air conditioner that is attached to a window so that the window can be opened and closed, and is equipped with a temperature sensor that detects the temperature of the intake air outside the room. This is a window type air conditioner that calculates the difference between the detected temperature and the detected temperature after a predetermined period of time has passed, and notifies you of an abnormality if this temperature difference is equal to or greater than a set value.

[Example of idea]

An embodiment of the present invention will be described with reference to FIGS. 1 to 5. As shown in FIGS. 2 and 4, the window type air conditioner equipped with the window closed detection device of this embodiment has an indoor side 1 and an outdoor side 2 separated by a partition plate 3 made of a heat insulating material, and an indoor side 1 and an outdoor side 2 separated by a partition plate 3 made of a heat insulating material. An indoor heat exchanger 4 and an indoor blower 5 are provided on the outside side 2, and an outdoor heat exchanger 6 and an outdoor blower 7 are provided on the outdoor side 2. Furthermore, an electrical parts box 8 and a compressor 9 are installed below the indoor blower 5. An outdoor temperature sensor 10 is attached to the center of the lower part of the outdoor heat exchanger 6, and is input to the inside of the electrical component box 8 by a lead wire.

Further, this window type air conditioner is attached to a window frame 12 by an installation member 11. At this time, the window 13 on the back of the air conditioner can be opened and closed as before the air conditioner was installed.

The refrigeration cycle of this window air conditioner is
This is a heat pump type refrigeration cycle in which a compressor 9, a four-way valve 14, an outdoor heat exchanger 6, a pressure reducing device 15, and an indoor heat exchanger 4 are connected in sequence.

Next, the control circuit portion of this embodiment will be explained.

The operating unit 22 and room temperature sensor 21, which instruct cooling/heating, operation/stop, set temperature, etc., are input, and the compressor 9, four-way valve 14, indoor blower 5, outdoor blower 7, and buzzer 20 are operated according to these inputs. The control means 23 which sends control signals to the power relay 24 and miniature relay 25 forms the center of this control circuit. Further, the control means 23 simultaneously controls the display of the display section 26 that displays cooling, heating, etc.

Next, the window closing detection device will be explained. Outdoor side 2
The outdoor temperature sensor 10 detects the temperature of the outside air being drawn in, and outputs the detected value to the temperature change detection means 30. The temperature change detection means 30 also receives an operation start signal from the control means 23 as input. This temperature change detection means 30 detects a change in outdoor temperature, and in this embodiment, a temperature change Δt in a predetermined time ΔT.
Detect and output. This output is input to the comparison means 36, which compares a preset set value t and this temperature change Δt,
If Δt is greater than t, it is determined that the window is closed and a signal is output. This signal is input to the control means 23, and upon receiving this signal, the control means 23 stops the air conditioner, blinks the display on the display section 26, and sounds the buzzer 20.

The temperature change detection means 30 will be explained in detail below. The temperature change detection means 30 has a timer A31 and a timer B3 which receive the operation start signal from the control means 23.
2, the time-up signal of the timer A31, and the outdoor temperature sensor 10 as inputs.
3. Second storage means B3 which receives the time-up signal of the timer B32 and the outdoor temperature sensor 10 as inputs.
4. It further comprises a calculation means 35 which receives the first storage means A33 and the second storage means B34 as inputs, and the output of this calculation means 35 is used as the output of the temperature change detection means 30.

The operation and output of each part of this air conditioner will be explained below with reference to FIG. First, when an operating signal is input from the operation unit 22 to the control means 23, the control means 23 turns on the air conditioner, that is, turns on the compressor 9 and the indoor/outdoor blowers 5 and 7, and also sends a signal to the temperature change detection means 30. Sends a signal to start operation. In the temperature change detection means 30, timer A31 and timer B32 start operating in response to this signal. Then, the timer A31 outputs a time-up output to the first storage means A33 at the lapse of time T1 after the operation start signal is input. The first storage means A33 stores the detected temperature t01 of the outdoor temperature sensor 10 when receiving this time-up output. Further, the timer B32 outputs a time-up signal after T2 time (T1<T2) has elapsed after the operation start signal was input. The second storage means B34 receives this time-up signal and stores the temperature T02 detected by the outdoor temperature sensor 10 at time T2. Both storage means A, B 33 and 34 output the stored detected temperatures to the calculation means 35. The calculation means 35 calculates the detected temperature t01 at time A1 stored in the first storage means A33 and the detected temperature stored in the second storage means B34.
The absolute value |t02−t01| of the difference between t02 (t02−t01) is determined and output. And the comparison means 36 uses this absolute value |
Compare t02−t01｜ with set value t, and from set value t｜
Output is performed to the control means 23 only when t02−t01| is large.

In other words, when the window behind the air conditioner is open, as shown in Figure 5a, there is almost no change in the outdoor temperature after the air conditioner is operated, so |t02−t01|
is approximately 0, which is lower than the set value t, and the comparison means 36 does not output. On the other hand, if the window behind the air conditioner is closed,
|t02'-t01| increases abnormally as shown in FIG. 26 and the buzzer 20, the display on the display unit 26 blinks, and the buzzer 20 sounds to notify of the abnormality. Also, when heating is performed with the windows closed, the same behavior as shown in Figure 5c occurs when cooling.
t02″−t01″｜ is an abnormally large value and comparison method 3
6 outputs to the control means 23.

As described above, according to this embodiment, since the closing of the window behind the window is detected by detecting the change in the temperature of the intake air outside the room, it is possible to reliably detect the closing of the window.
Since the air conditioner is stopped and the user is notified of the abnormality by a buzzer or display, the air conditioner can be protected and the user can be notified to close the window.

Furthermore, since the present invention detects changes in the temperature of the outdoor intake air, it is also possible to detect a situation in which outdoor air cannot be drawn in for some reason even if the window is open, such as an abnormality due to a malfunction of an outdoor blower.

[Effect of idea]

According to the present invention, the difference between the intake air temperature after a certain period of time has elapsed since the start of operation and the intake air temperature after a further predetermined period of time has elapsed, and if this temperature difference is greater than a set value, the window is closed. Since an abnormality is reported, it is possible to notify the window closed state reliably and early.

In other words, just before the start of operation, the windows are normally closed, so the outdoor side becomes quite hot due to the influence of sunlight, making it difficult to accurately detect the suction temperature.
In this invention, a window closing abnormality is detected based on the difference between the intake air temperature after a certain period of time has elapsed from the start of operation when the suction air temperature is stable, and the suction air temperature after a further predetermined period of time. It can be identified early without having to worry about it.

[Brief explanation of the drawing]

Fig. 1 is a control block diagram of a window-type air conditioner to which a window closed detection device according to an embodiment of the present invention is applied, Fig. 2 is a cross-sectional view of the air conditioner, and Fig. 3 is a control block diagram of the same air conditioner. FIG. 4 is a longitudinal sectional view of the air conditioner, and FIG. 5 is a graph showing changes in outdoor temperature of the air conditioner from the start of operation. 1... Indoor interior, 2... Outdoor temperature sensor, 10... Outdoor temperature sensor, 23... Control means, 36... Comparison means.

Claims (1)

[Scope of utility model registration request] In a window type air conditioner, which is installed in a window so that the indoor side and the outdoor side are separated internally, and the outdoor side faces outdoors and the window can be opened and closed, the air conditioner is installed on the outdoor side and controls the temperature of the intake air on the outdoor side. a temperature sensor for detecting; a first storage means connected to the temperature sensor for storing the temperature detected by the temperature sensor after a certain period of time has elapsed from the start of operation; and a first storage means connected to the temperature sensor. a second storage means for storing the detected temperature of the temperature sensor after a predetermined period of time has passed since the temperature was stored; and a second storage means for storing the detected temperature stored in the first storage means and the second storage means A calculating means for calculating the difference between the detected temperature and the detected temperature, a comparing means for outputting a signal when the temperature difference calculated by the calculating means is greater than or equal to a set value, and a notifying means for notifying an abnormality by the output of the comparing means. A window-type air conditioner characterized by: