JPH0114841Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an air conditioner that automatically shifts the set value of indoor temperature.

[Technical background of the invention] Conventionally, air conditioners that automatically shift the set value (target value) of the indoor temperature have been operated according to a preprogrammed procedure using an external instruction signal such as a so-called "sleep timer." One method is to shift the temperature setting value to compensate for the outside temperature, and the other is to shift the temperature setting value to compensate for the outside temperature.

[Problems with background technology]

However, with any of the conventional methods, it has been impossible to automatically shift the set temperature in response to an increase or decrease in load, such as an increase in load due to an increase in the number of people indoors during cooling operation. It has been difficult to control the system so that it meets the current situation and achieves energy-saving operation.

[Purpose of invention]

The present invention was developed in order to eliminate the above-mentioned drawbacks, and it is an air conditioner that automatically shifts the set temperature according to the load situation, constantly maintains the room temperature at a comfortable temperature, and at the same time enables energy-saving operation. The purpose is to provide.

[Summary of the idea]

In order to achieve the above object, the present invention determines the load status based on whether or not the room temperature reaches a set temperature within a specified time. The compressor c for circulating the refrigerant in the refrigeration cycle is turned on and off so that the indoor temperature detected by the indoor temperature setting means b becomes equal to the set temperature set by the indoor temperature setting means b.
In the air conditioner to be turned off, a load condition detection means d detects the operation time of the compressor c, a specified time storage means e stores the allowable continuous operation time of the compressor c as a specified time τ, and a compressor from the load condition detection means d. a time determination means f that compares and determines the operating time t and the specified time τ from the specified time storage means e; and the indoor temperature detected by the indoor temperature detection means a and the temperature set by the indoor temperature setting means b. A temperature determining means g that compares and determines the set temperature, a compressor start/stop means h that starts and stops the compressor c based on the determination result of the temperature determining means g, and a temperature determining means g and a time determining means f. Based on the determination result of the air conditioning determining means i, the indoor temperature setting means b determines whether the indoor temperature has reached the set temperature within a specified time, and the air conditioning load increases. The present invention is characterized in that it is provided with a shift/release means j for shifting in the direction or canceling the shift.

[Example of idea]

FIG. 2 is a block diagram showing an embodiment of the present invention. The microcomputer 1 includes a room temperature sensor 2 including a temperature sensing element 2A placed in an atmosphere at room temperature T _A , and a set temperature set in advance from the outside.
It is connected to the temperature setting means 3 in which T _S is stored, and the room temperature T _A and the set temperature T _S are input. Furthermore, as a result of the determination based on the procedure to be described later, the microcomputer 1 activates the compressor 5 for circulating the refrigerant in the refrigeration cycle via the compressor start/stop means 4.
control. On the other hand, compressor start/stop means 4
The output of is inputted to the microcomputer 1 as the operating time of the compressor 5 as the load condition. The inside of the microcomputer 1 memorizes the specified time.
It consists of a ROM, a RAM that temporarily stores predetermined information, and a CPU that controls these.

The operation in such a configuration will be explained below. FIG. 3 is an explanatory diagram showing the control procedure in an embodiment of the cooling operation of the present invention, and FIGS. 4 and 5 are flowcharts showing the control procedure in the first embodiment.

First, regarding the control procedure of the first embodiment, Sections 3 to 5
This will be explained using figures. In FIG. 3, the dash-dotted line shows the control procedure of the first embodiment, the horizontal axis shows time, and the vertical axis shows room temperature _TA . Furthermore, dotted and hatched areas indicate the compressor operation time period, and blank areas indicate the air blowing time period.

When the cooling operation switch is pressed (step), the indoor blower is first operated (step), and when the room temperature _TA is higher than the set temperature _TS , the compressor starts operating (step ~). At the same time, a timer that counts the operating time of the compressor starts (step). then room temperature
A drop in T _A is constantly detected and compared with the set temperature T _S (step). Furthermore, the compressor operating time t is also compared with the specified time τ ₁ (step).

Here, if the room temperature T _A reaches the set temperature T _S within the specified time τ ₁ , the compressor is turned off (step), only air is blown, and at the same time the timer that counts the compressor operating time t is turned off. (step). On the other hand, if the room temperature T _A does not reach the set temperature T _S even though the specified time τ ₁ has been reached, the set temperature T _S is shifted to the lower temperature side by the shift amount α (step), and the compressor is operated. Continue (step ~). Then, when the room temperature T _A reaches the new set temperature (T _S −α), the compressor is turned off (step). In addition,
In this embodiment, the set temperature is shifted only once when the compressor operating time t has exceeded the specified time τ ₁ .

The above is the control for turning off the compressor. Next, the control for turning on the compressor will be explained with reference to FIG. In the above explanation, when the set temperature is being shifted, the shift is canceled (step), and when the shift is not being carried out, the process directly proceeds to the next step. Here, room temperature
An increase in T _A is constantly detected, and the room temperature T _A is compared with the set temperature T _S plus the temperature difference β (T _S + β) (step, ).

Therefore, if the room temperature T _A is lower than the temperature T _S +β, the air continues to be blown, but as the room temperature T _A rises, when the temperature becomes higher than the temperature T _S +β, the compressor is turned on (step) and the compressor operating time t is counted. Start a timer.
(step). Thereafter, a decrease in the room temperature T _A is constantly detected, and the procedure for turning off the compressor (steps ~〓〓) is the same as the steps ~ above.

In the first embodiment, the indoor load situation is determined by the compressor operating time t, and when the room temperature T _A reaches the set temperature T _S within the specified time τ ₁ , the compressor is turned off and the load increases. In other words, even after the specified time τ ₁ has elapsed, the room temperature T _A remains the set temperature T _S
When the set temperature T _S is not reached, the set temperature T S is shifted, and when the new set temperature (T _S −α) is reached, the compressor is turned off and the shift is immediately released.

Next, a second embodiment will be explained.

The steps from turning on the air conditioner switch (step) to reaching a predetermined room temperature _TA , turning off the compressor, and turning off the timer (step) are the same as in the first embodiment. Thereafter, in the air blowing state, the shift was immediately canceled in the first embodiment, but in the second embodiment, this was not done, and when it was determined that the load had decreased in the compressor on state, that is, within the specified time τ ₂ . The room temperature T _A is the new set temperature (T _S −
When α) is reached, the shift is canceled.

The solid line in FIG. 3 shows the control procedure according to the second embodiment, and FIG. 6 is a flowchart thereof.

After the compressor is turned off and the timer is turned off in the above step, the air blowing state is continued (step 〓〓). Here, an increase in the room temperature T _A is constantly detected, and the room temperature TA is the set temperature T _S (here
It is compared with the temperature (T _S + β) which is the sum of the temperature difference β to the temperature difference β (T _S − α) (step 〓〓, ).

Therefore, if the room temperature T _A is lower than the temperature T _S +β, the air continues to be blown, but as the room temperature T _A rises, when the temperature becomes higher than the temperature T _S +β, the compressor is turned on (step), and the compressor is operated for a time t. Start a timer that counts (Step 〓〓).

Thereafter, if the room temperature T _S does not reach the set temperature T _{S (} here T _S −α) within the specified time τ ₂ , the shift is not canceled and the control described above is repeated, but the set temperature T _S is reached within the specified time τ ₂ . When the load reaches , it is determined that the load has been reduced and the shift is canceled.

In the second embodiment, the shift is not canceled unless it is determined that the load has been reduced, so as is clear from FIG. 3, the indoor temperature is maintained at a lower temperature than in the first embodiment. have a tendency. Therefore, when applied indoors where the load is always large, the cooling effect is large.

In contrast, the first embodiment produces an energy saving effect when applied to room temperature where the load is not large.

Note that the specified times τ ₁ and τ ₂ are the ROM in Fig. 2.
Further, it is possible to set the values to be the same or different depending on the control method.

Further, in the embodiments, an air conditioner that performs cooling has been described, but it is clear that the present invention can also be applied to an air conditioner that performs heating.

[Effect of idea]

This invention automatically shifts the set temperature according to the load situation, so for example, when the number of people in a store increases, or when the outside temperature rises and the room temperature rises due to radiant heat. You can automatically change the temperature setting when the temperature changes. Therefore, when cooling, the set temperature can be initially set higher depending on the load situation, so it is possible to obtain an air conditioner that operates in an energy-efficient manner, and even when the load increases, it can always provide comfortable cooling and comfortable heating. It has the advantage of being able to obtain

[Brief explanation of the drawing]

Figure 1 is a functional block diagram showing the configuration of the present invention.
Figure 2 is a block diagram showing an embodiment of the present invention;
The figure is an explanatory diagram showing the control procedure of the embodiment of the present invention, and FIGS. 4, 5, and 6 are flowcharts thereof. a...Indoor temperature detection means, b...Indoor temperature setting means, c...Compressor, d...Load condition detection means, e...Specified time storage means, f...Time determination means, g...Temperature determination means , h... Compressor start/stop means, i... Air conditioning determination means, j... Shift/release means.

Claims (1)

[Scope of utility model registration request] In an air conditioner that turns on and off a compressor for circulating refrigerant in a refrigeration cycle so that the indoor temperature detected by the indoor temperature detection means becomes equal to the set temperature set by the indoor temperature setting means, load condition detection means for detecting the operating time of the compressor; specified time storage means for storing the allowable continuous operation time of the compressor as a specified time; and the compressor operation time from the load condition detection means and the specified time from the specified time storage means. a time determining means for comparing and determining the indoor temperature detected by the indoor temperature detecting means and a set temperature set by the indoor temperature setting means; Compressor start/stop means for starting and stopping the compressor based on the determination results; and air conditioning determination for determining whether the indoor temperature has reached the set temperature within a specified time based on the determination results of the temperature determination means and the time determination means. and a shift/cancel means for shifting or canceling the set temperature of the indoor temperature setting means in the direction of increasing the air conditioning load based on the determination result of the air conditioning determining means. .