JP3101369B2 - Air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner provided with a control device for automatically switching between heating, dehumidifying and cooling operation modes.

[0002]

2. Description of the Related Art An air conditioner having heating, dehumidification, and cooling operation modes is disclosed in Japanese Utility Model Publication No. 63-1151.

[0003] Recently, a system equipped with a control device for automatically switching these operation modes in accordance with room temperature is also commercially available.

[0004]

In the above-described air conditioner, the dehumidifying operation is always performed when the room temperature is in a range of, for example, 15 ° C. to 26 ° C.

[0005] In this temperature range, during the rainy season of June to July,
Although it was comfortable during the long rainy season in October, it was sometimes more comfortable to perform the heating operation in the winter and spring seasons other than that time, and the operation was not always performed in a comfortable operation mode.

[0006] The present invention provides an air conditioner that operates in an operation mode according to a calendar.

[0007]

SUMMARY OF THE INVENTION The present invention relates to an air conditioner provided with a control device for automatically switching operation modes of heating, dehumidification, cooling and air blowing according to the relationship between outside air temperature and room temperature. The apparatus has a selection means for selecting an operation mode according to the calendar when both the outside air temperature and the room temperature are within the predetermined temperature range, and performs control regardless of the calendar outside the predetermined temperature range. If the outside air temperature is lower than a first temperature set in a predetermined temperature range and the room temperature is higher than a second temperature set in the predetermined temperature range, the air blowing operation is performed in the same manner as in the blowing operation. Heating control means for performing a heating operation when the room temperature is lower than the first temperature and the room temperature is lower than the second temperature; and an outside air temperature higher than the first temperature and a room temperature in a range of the predetermined temperature. Cooling operation if higher than the upper limit The same in which room temperature is provided, and a cooling control means for dehumidifying or blowing operation is lower than the upper limit of the range of the predetermined temperature.

[0008]

In this air conditioner, when both the outside air temperature and the room temperature are within the predetermined temperature range, the operation mode is automatically selected according to the calendar, and the control is performed independently of the calendar outside the predetermined temperature range. When the outside air temperature is lower than a preset first temperature within a predetermined temperature range and the room temperature is higher than a preset second temperature within a predetermined temperature range. Similarly, when the outside air temperature is lower than the first temperature and the room temperature is lower than the second temperature, the heating operation is performed, and the outside air temperature is higher than the first temperature and the room temperature is the upper limit of the predetermined temperature range. If the temperature is higher than the predetermined value, the cooling operation is performed, and if the room temperature is lower than the upper limit of the predetermined temperature range, the dehumidifying or blowing operation is performed.

[0009]

An embodiment of the present invention will be described with reference to the drawings.

1 is an air conditioner, 2 is a variable capacity compressor,
3 is a four-way valve, 4 is an outdoor heat exchanger, 5 is a decompression device, 6 is an indoor heat exchanger, and these are respectively connected by refrigerant pipes.

8 is an outside air temperature sensor for detecting the outside air temperature, 9 is a room temperature sensor for detecting the room temperature, and 10 is a control for automatically switching the operation mode of heating, dehumidification and cooling in accordance with the relationship between the outside air temperature and the room temperature. The device 11 is provided with a timer circuit for calculating a calendar, and when the outside air temperature is 15 ° C. to 20 ° C. and the room temperature is in a temperature range of 15 ° C. to 26 ° C. [predetermined temperature range], it is 5 to 10 months If it is, a selecting means for selecting the dehumidifying operation, and if it is 11 to April, a selecting means for selecting the heating operation, and 12 is a control means for controlling the four-way valve 3, the indoor fan 13, the outdoor fan 14, and the compressor 2.

Reference numeral 15 denotes a setting device such as a remote controller for setting an automatic operation mode or one of the operation modes by a user. Reference numeral 16 denotes a switch for performing a specific dehumidifying operation slightly different in control from the dehumidifying operation.

The control device of the air conditioner 1 configured as described above includes a selection unit, a heating control unit, and a cooling control unit. As shown in FIG. 2, the selection means determines that both the outside air temperature and the room temperature are within a predetermined temperature range (the outside air temperature is 15 ° C.).
~ 20 ° C, room temperature is 15 ° C or higher to 26 ° C), the dehumidification operation is performed from May to October, and the heating operation is performed from 11 to April. Select the operation mode. The heating control means performs control regardless of the calendar outside the predetermined temperature range, and the outside air temperature is lower than a preset first temperature (18 ° C.) within the predetermined temperature range and When the room temperature is higher than a second temperature (24 ° C.) set in advance within the range of the predetermined temperature, the air blowing operation is performed similarly, and the outside air temperature is lower than the first temperature and the room temperature is the second temperature. If it is lower than this, the heating operation is performed. The cooling control means is configured such that the outside air temperature is higher than the first temperature and the room temperature is the upper limit (26 °) of the predetermined temperature range.
When the temperature is higher than C), the cooling operation is performed, and when the room temperature is lower than the upper limit of the predetermined temperature range, the dehumidifying or blowing operation is performed.

For this reason, in the rainy season of June to July or in the long rainy season of September to October, the dehumidifying operation for dehumidification is automatically selected in the slightly chilly season of November to April. Therefore, the vehicle is automatically operated in an optimal operation mode according to the season.

In the air conditioner 1, when the switch 16 is pressed when the operation mode is the cooling operation or the dehumidifying operation, the air conditioner 1 is controlled as shown on the right side of FIG.

When the room temperature is 16 to 30 ° C. and the outside air temperature is 22 ° C. or higher, the frequency f applied to the compressor 2 is controlled to 18 Hz, the indoor fan 13 is operated intermittently, and the cooling tends to be slightly large. Dehumidification operation is performed.

Further, when the room temperature is 16-30 ° C. and the outside air temperature is 22
When the temperature is lower than 0 ° C., the applied frequency f to the compressor 2 is controlled to 12 Hz, the indoor fan 13 is operated intermittently, and a cooling-type dehumidifying operation with a small temperature drop is performed.

When the room temperature is 30 ° C. or higher, a cooling operation for maintaining the room temperature at 30 ° C. is performed.

In the air conditioner 1, when the switch 16 is pressed when the operation mode is the heating operation, the air conditioner 1 is controlled as shown on the left side of FIG.

When the room temperature is lower than 10 ° C., a heating operation for maintaining the room temperature at 10 ° C. is performed.

When the room temperature is 10 ° C. or more and less than 22 ° C., the heating operation is performed so that the outside air temperature is plus 5 ° C.

When the outside air temperature is, for example, 10 ° C. and the relative humidity is 80%, the relative humidity can be reduced to about 58% and 60% or less at the room temperature of the outside air temperature plus 5 ° C. Similarly, when the ambient temperature is 13 ° C., the relative humidity can be lowered to 60% or less at the room temperature of the ambient temperature plus 5 ° C., as in the example where the room temperature is set to the ambient temperature plus 5 ° C. in most cases. Humidity can be reduced to 60% or less.

For this reason, by controlling the room temperature to the outside air temperature plus 5 ° C., the relative humidity can be controlled to a substantially predetermined value without providing a humidity sensor.

[0024]

According to the present invention, in an air conditioner having a control device for automatically switching operation modes, when both the outside air temperature and the room temperature are within a predetermined temperature range, the operation mode is changed according to the calendar. It is automatically selected and performs control regardless of the calendar when the temperature is outside the predetermined temperature range. The outside air temperature is lower than the first temperature set in the predetermined temperature range and the room temperature is lower than the predetermined temperature. When the outside air temperature is lower than the first temperature and the room temperature is lower than the second temperature, a heating operation is performed when the outside air temperature is higher than a second temperature set in advance in the range, and the outside air temperature is lower. When the temperature is higher than the first temperature and the room temperature is higher than the upper limit of the predetermined temperature range, the cooling operation is performed, and when the room temperature is lower than the upper limit of the predetermined temperature range, the dehumidifying or blowing operation is performed. In this way, when the cooling and heating can be sufficiently judged based on the outside temperature, the cooling (dehumidification) operation and the heating (blowing) operation are performed regardless of the calendar. When reliable operation cannot be selected at the outside temperature, automatic operation can be performed in an optimal operation mode according to the calendar.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an air conditioner showing one embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an operation mode during automatic operation of the air conditioner.

FIG. 3 is an explanatory diagram showing a specific dehumidifying operation of the air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air conditioner 10 Control device 11 Selection means

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kazunobu Hosogai 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (56) References JP-A-63-306344 (JP, A) JP-A Sho 62-272045 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 11/02 F25B 13/00

Claims (1)

(57) [Claims] An air conditioner provided with a control device for automatically switching operation modes of heating, dehumidification, cooling and air blowing according to a relationship between an outside air temperature and a room temperature. selection means for selecting the operating mode according to the calendar but when both located within a predetermined temperature, before
If the temperature is outside the specified temperature range, control is performed regardless of the calendar.
The outside air temperature is set in advance within the range of the predetermined temperature.
The room temperature is lower than the first temperature and the room temperature is within the predetermined temperature range.
Blow operation when the temperature is higher than the preset second temperature
And the outside air temperature is lower than the first temperature and the room temperature
Heating is performed when the temperature is lower than the second temperature.
Control means, and the outside air temperature is higher than the first temperature and
If the room temperature is higher than the upper limit of the predetermined temperature range,
Room operation is also room temperature from the upper limit of the predetermined temperature range
Cooling control means to perform dehumidification or air blowing operation when the temperature is low
An air conditioner characterized by comprising: