JPH04302937A - Method of controlling air conditioner - Google Patents

Abstract

PURPOSE:To perform a more comfortable air conditioning throughout all four seasons. CONSTITUTION:Refrigerating cycles (1 to 5) of an air conditioner and its controlling means (6 to 9, 11) are provided. Setting conditions for operation modes such as heating operation, cooling operation, drying operation and monitoring operation and the like to set in program in advance in response to information got from an indoor temperature sensing means 8, an indoor humidity sensing means 9 and an outdoor temperature sensing means 11 are referred and then a compressor 1 or a four-way valve 2 or the like is controlled in an adapted operation mode. When the operation mode is determined, for example, a discrimination is carried out for judging that an indoor humidity is 50% or more or less, an outdoor temperature To is 17 deg.C or less, 17 deg.C to 19 deg.C or 19 deg.C or more and an indoor temperature Tr is Tr2 or more, Tr1 to Tr2 or Tr1 or less in reference to the upper and lower two reference temperatures Tr1 and Tr2 defined for each of months.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the automatic operation of air conditioners, and more particularly to a control method for providing comfortable air conditioning throughout the seasons.

0002

[Prior Art] An air conditioner has a plurality of detection means for detecting indoor temperature, indoor humidity, outdoor temperature, etc., and setting conditions for a plurality of operation modes in which information obtained from these plurality of detection means is preset in a program. In contrast, it is equipped with a control means (microcomputer) that controls the operation of the compressor, outdoor blower, indoor blower, etc., and is designed to operate automatically throughout the year. In addition to heating and cooling, automatic operation modes include dry operation, which reduces the compressor rotation speed and blower air volume, and stops all operations for a predetermined period of time (for example, 15 minutes). There is a monitoring operation, etc., but conventionally, as shown in Figs. 2 and 3, when the outdoor temperature To becomes 17°C or less, a preset indoor temperature judgment reference value (Tr1) is set, regardless of the indoor humidity. , Tr2), the monitoring operation or the heating operation is executed according to the indoor temperature Tr determined by the outdoor temperature To.
is in the range of 17℃ to 19℃, indoor humidity and indoor temperature T
Monitoring operation is executed regardless of the level of r, and the outdoor temperature To
When the temperature exceeds 19°C, cooling operation or monitoring operation is performed depending on the level of the indoor temperature Tr.
The control method was such that when r1≦Tr<Tr2 and the indoor humidity was 50% or more, dry operation was executed.

0003

[Problem to be Solved by the Invention] However, in conventional automatic driving, the indoor temperature determination reference values (Tr1 and Tr2 in Figures 2 and 3) used when determining the driving mode are set to the same value throughout the year. Therefore, there is a risk that, for example, during the rainy season, heating operation may be performed instead of dry operation or monitoring operation, and such operation may cause discomfort to the user. Therefore, an object of the present invention is to provide an air conditioner control method that eliminates such inappropriate operation and provides comfortable air conditioning throughout the year.

0004

[Means for Solving the Problems] The present invention has been made to solve the above-mentioned problems, and it detects indoor temperature, indoor humidity, and outdoor temperature, and uses these information in a heating operation that is preset in a program. In an air conditioner that automatically operates in an appropriate operation mode by comparing the setting conditions of the operation mode such as cooling operation, dry operation, monitoring operation, etc., when determining the operation mode, the indoor temperature We decided to set monthly indoor temperature judgment criteria and change the indoor temperature judgment criteria from month to month.

[0005]

[Function] With the above configuration, when the operation mode is selected and set, the indoor temperature is judged based on the indoor temperature judgment criteria determined for each month, along with the indoor humidity and outdoor temperature, so the seasonal (monthly) This means that the appropriate operating mode will be selected, allowing comfortable air conditioning throughout the year.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. Figure 1 shows the refrigeration cycle of an air conditioner and its control system, where 1 is a compressor, 2 is a four-way valve that switches the flow of refrigerant discharged from compressor 1 according to heating operation, cooling operation, etc., and 3 Reference numeral 4 indicates an outdoor heat exchanger, 4 indicates a throttle means such as a capillary tube, and 5 indicates an indoor heat exchanger, which are connected by pipes in a ring shape as shown in the figure. 6 is an indoor unit control unit provided on the indoor unit side, and 7 is an outdoor unit control unit provided on the outdoor unit side, and the two are connected by a predetermined signal line or the like. Indoor unit control unit 6
An indoor temperature detecting means 8 and an indoor humidity detecting means 9 are connected to the indoor temperature detecting means 8 and indoor humidity detecting means 9 to control an indoor blower 10 and the like. On the other hand, an outdoor temperature detection means 11 is connected to the outdoor unit control unit 7, and is configured to control the compressor 1, the four-way valve 2, the outdoor fan motor 12, and the like. Note that the arrows shown as solid lines in FIG. 1 represent the flow of refrigerant during cooling operation, and the arrows shown as broken lines represent the flow of refrigerant during heating operation.

FIG. 2 shows the operating modes such as cooling operation, heating operation, and monitoring operation that are applied when the humidity detected by the indoor humidity detection means 9 is 50% or less, and their setting conditions. The operating modes such as cooling operation, heating operation, monitoring operation, and dry operation, which are applied when the humidity detected by the humidity detection means 9 is 50% or more, and their setting conditions are shown. FIG. 4 is a monthly temperature calendar (a list of monthly indoor temperature determination reference values) that is applied when determining the operation mode shown in FIGS. 2 and 3. In addition, the symbol Tr written in FIGS. 2 to 4 is the indoor temperature, To is the outdoor temperature, Tr1 is the lower limit value for determining the indoor temperature determined by month, and Tr2 is the indoor temperature determined by month. This is the upper limit value for classifying temperature.

The control means (microcomputer) consisting of the two control units 6, 7, etc. is programmed with operating mode setting conditions as shown in FIGS. 2 to 4 in advance. The microcomputer is the indoor temperature detection means 8
The information obtained from the indoor humidity detecting means 9 and the outdoor temperature detecting means 11 is compared with the operating mode setting conditions set in the program, and the operating mode is selected and set. When the operation mode is selected, the control means operates the compressor 1, the four-way valve 2, and the outdoor blower 11 according to a predetermined program.
, controls the indoor blower 10, etc. Operation modes for automatic operation include heating operation, cooling operation, dry operation, monitoring operation, etc. Among these, the humidity detected by the indoor humidity detection means 9 is involved in selecting the operation mode. 2
As is clear from FIG. 3, for example, during the rainy season, when the indoor temperature Tr satisfies the condition Tr1≦Tr<Tr2 and the outdoor temperature To satisfies the condition To≧19°C, dry operation is performed. This is only when making a decision on whether to operate the vehicle or monitor operation.

FIG. 5 is a very simple representation of the part related to the present invention in a complicated operation flowchart of an air conditioner. In step ST1, the indoor temperature Tr, the outdoor temperature To,
When the indoor humidity is detected, the process proceeds to step ST2. In step ST2, Tr1 and Tr2 for the current month are called out from the monthly temperature calendar shown in FIG. Step S
At T3, the indoor temperature Tr detected at step ST1,
It is determined which conditions in FIG. 2 or 3 the outdoor temperature To and humidity match, respectively, and the operation mode is determined accordingly, and the process proceeds to step ST4. Step ST4 repeatedly executes the operations of steps ST1 to ST3.

0010

[Effects of the Invention] If the air conditioner is controlled by the control method described above, the operation modes such as heating operation, cooling operation, dry operation, monitoring operation, etc. can be determined monthly based on the indoor temperature, indoor This is done while taking into account humidity, outdoor temperature, etc., so comfortable air conditioning is achieved throughout the year.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a refrigeration cycle and its control system showing one embodiment of the present invention.

FIG. 2 is a diagram showing operation modes and setting conditions for the present invention and a conventional example.

FIG. 3 is a diagram showing operation modes and setting conditions for the present invention and a conventional example.

FIG. 4 is a monthly temperature calendar showing one embodiment of the present invention.

FIG. 5 is a control flowchart showing one embodiment of the present invention.

[Explanation of symbols]

1 Compressor 2 Four-way valve 3 Outdoor heat exchanger 4 Squeezing means (capillary tube) 5 Indoor heat exchanger 6 Indoor unit control unit 7 Outdoor unit control unit 8 Indoor temperature detection means 9 Indoor humidity detection means 10 Indoor fan motor 11 Outdoor temperature detection means 12 Outdoor fan motor

Claims (1)

[Claims] [Claim 1] Detects the indoor temperature, indoor humidity, and outdoor temperature, and compares this information with the pre-programmed operating mode setting conditions such as heating operation, cooling operation, dry operation, monitoring operation, etc. In an air conditioner that is configured to automatically operate in an operating mode, a monthly indoor temperature judgment reference value is provided for indoor temperature judgment in determining the operating mode, and the indoor temperature judgment standard is A method for controlling an air conditioner, characterized by controlling the air conditioner so as to change it monthly.