JPH02267444A - Air conditioner - Google Patents

Abstract

PURPOSE:To provide a pleasant and comfortable environment compared to the environment where room temp. is controlled at a constant state by a method wherein the maximum space cooling and heating capacity and the minimum one are changed so that the room temp. is varied between the high and low temp. set values near a set temp. and also with the condition that the max. rising and falling time are not exceeded. CONSTITUTION:As for a space cooling and heating capacity, a variable means (d) varies the capacity of a generating means (a) for a space cooling and heating capacity from the output of an arithmetic means (c) for cooling and heating capacity which determines the cooling and heating capacity based on the input from a room temp. detector (b). A shifting arithmetic means e (g) changes the operation into the maximum cooling (minimum heating) capacity operation when the operation temp. reaches a high temp. set value which is higher by about 0.5 or 1.5 (deg) during the temp. rising period of the cooling (heating) operation and changes the operation into the minimum cooling (the maximum heating) capacity operation when the operating temp. reaches a low temp. set value lower by about 0.5 to 1.5 deg.C during the temp. falling period of the cooling (heating) operation. When the respective operation periods of the maximum and minimum cooling (heating) capacity reach a fixed time, a switching arithmetic means f(h) changes the maximum cooling (heating) capacity operation with the minimum cooling (heating) capacity operation before the high temp. set value or the prescribed low temp. set value is reached.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to an air conditioner.

(Prior art) Fig. 4 is an electric circuit diagram of an early air conditioner which is the first conventional example, Fig. 5 is a flowchart explaining the operation of the air conditioner shown in Fig. 4, and Fig. 6 is a diagram of the air conditioner shown in Fig. 4. The control characteristic diagram of the air conditioner shown in Figure 7 is the second conventional example, and for example, the electrical circuit diagram of the air conditioner shown in the Mitsubishi room air conditioner catalog (created in September 1982), and Figure 8 is the second conventional example. FIG. 7 is a flowchart for controlling the operation of the second conventional example, and FIG. 9 is a slJ control characteristic diagram of the conventional example shown in FIG. 7. First, the air conditioner shown in the electrical circuit diagram of FIG. 4 will be described. Drawing 4th
In the figure, 1 is a power switch, 2 is a temperature detector made of a thermistor or something similar to detect the room temperature, 3 is an A/D converter, and 4 is a switch section for setting a set temperature, etc. 5 is a microcomputer, which includes an input circuit 8, a CPU 9. Memory 10. It has an output circuit 11. The output of the switch section 4 and the output from the temperature detector 2 are input to the input circuit 8 via the A/D converter 3. The heating and cooling capacity start/stop device 12 controls the on/off of the compressor 6 based on the output from the output circuit 11 .

Next, the operation of the air conditioner will be described in the case of cooling operation using the flowchart shown in FIG. When the power switch 1 is turned on, operation starts. Step 5
In step a, the set temperature Ts is set, and in step 5b, the room temperature Tr detected by the temperature detector 2 is input manually. Next, in step 5c, the temperature difference (ΔT) is calculated from the set temperature and the room temperature, and if the room temperature Tr does not exceed the set temperature Ts in step 5d, the operation of the compressor 6 is stopped by the cooling/heating capacity start/stop device 12 in step 5e. It will be done. If the room temperature exceeds the set temperature in step 5d, the compressor 6 is turned off by the cooling/heating capacity start/stop device 12 in step 5f. In this way, the cooling operation is performed so that the temperature Tr is maintained near the set temperature Ts. FIG. 6 shows a control characteristic diagram in this case.

As shown in Figure 6, there is a time delay in the temperature sensor, so there is a control range for on/off, and when the air conditioner is turned off, it cannot be restarted for a certain period of time.When the air conditioner is turned off, the room temperature drops. In the part a of the figure, the occupants felt cold, and when they turned it on again, the room temperature rose too much, and in the part a of the figure, the occupants felt hot.

The compressor 6 was developed to solve this problem.
It attempts to vary the cooling and heating capacity by changing the rotation speed of the
Since the heating and cooling capacity is controlled so that the room temperature reaches the set temperature, the room temperature can be controlled to be equal to the set temperature. FIG. 7 is an electrical circuit diagram of a second conventional air conditioner with variable heating and cooling capacity. In Figure 7 of the drawing, the same symbols as in Figure 4 are the same.
or a corresponding portion. Further, reference numeral 5 denotes a microcomputer equipped with a heating and cooling capacity calculation means for calculating the heating and cooling capacity according to the room temperature detected by the temperature detector 2, and an input circuit 8. CPU9. It has a memory 10 and an output circuit 11. The output of the switch section 4 and the output from the temperature detector 2 are input to the input circuit 8 via the A/D converter 3. The heating and cooling capacity variable device 12 controls the rotation speed of the compressor 6 based on the output from the output circuit 11h).

Next, we will discuss the operation of the second conventional air conditioner in the eighth section.
The case of cooling operation will be explained using the flowchart shown in the figure. When the power switch 1 is turned on, operation starts. In step 8a, the set temperature Ts is set, and in step 8b, the room temperature Tr detected by the temperature detector 2 is input. Next, in step 8c, the temperature difference (ΔT) is calculated from the set temperature Ts and the room temperature Tr, and in step 8d, if the room temperature Tr exceeds the set temperature Ts, the process proceeds to step 8e, and the room temperature Tr is calculated from the temperature difference (ΔT). is approaching the set temperature Ts, the cooling capacity is gradually lowered and the room temperature reaches the set temperature Ts.
The cooling capacity is calculated such that when the temperature rises above a certain range centered on , the cooling capacity is increased. According to this calculated cooling capacity, the rotation speed of the compressor 6 is controlled by the cooling/heating capacity variable device 12 in step 8f. Through this control, room temperature control is performed so that the room temperature becomes equal to the set temperature, as shown in the control characteristic diagram of FIG.

[Problem to be solved by the invention]

As described above, in conventional air conditioners, the room temperature is always controlled to a set temperature that is comfortable for the occupants. The purpose of using an air conditioner was to escape from heat and cold, and to create an environment that was neither hot nor cold.

However, nowadays there is a need for a comfortable environment that goes one step further than this neither hot nor cold environment. It is said that people feel hot or cold when the body's body temperature regulation function works to maintain body temperature at an appropriate level when the amount of heat produced and the amount of heat released are not equal. In a moderate environment, the amount of heat produced and the amount of heat dissipated by a person are equal, the body temperature is maintained at an appropriate value, and the body temperature regulation function does not work.
Humans have no sense of cold or heat. FIG. 10 shows the results of the sensory experiment. Normally, a person's sense of comfort, such as ``comfortable 1r unpleasant j,'' has a quadratic relationship with temperature, with the sense of comfort increasing at a moderate temperature.However, as shown in the temperature range X in the figure, a person's sense of comfort The variation Y also tends to increase at moderate temperatures.It is also seen that the level is low and it is never comfortable.

As described above, conventional air conditioners have the problem that although they can create an environment that is neither cold nor hot, they cannot create a comfortable environment.

This invention was made in order to solve the problems of the conventional example as described in 5. It is possible to change the room temperature between a high temperature set value and a low temperature set value in the vicinity of the set temperature without exceeding the maximum rise and fall time. By switching between the maximum cooling and heating capacity and the minimum heating and cooling capacity, the set temperature can be set lower for heating and higher for cooling, which is economical and at the same time stimulates the user's physiological functions and cerebrum. The aim is to provide a more pleasant and comfortable environment compared to conventional environments where the room temperature is controlled at a constant level.

[Means for solving the three problems] Therefore, in this invention, the heating and cooling capacity is generated,
A heating and cooling capacity generation means whose capacity can be varied; a room temperature detection means for detecting the room temperature; a heating and cooling capacity calculation means for determining the heating and cooling capacity based on the input from the room temperature detection means; and an output from the heating and cooling capacity calculation means. The cooling/heating capacity variable means changes the capacity of the cooling/heating capacity generation means, and when the temperature reaches a high temperature set value approximately 0.5 to 1.5 (deg) higher than the set temperature during the temperature rise during cooling operation, the maximum cooling capacity operation is performed. , switching calculation means for switching to minimum cooling capacity operation when a low temperature setting value approximately 0.5 to 1.5 [deg] lower than the set temperature is reached during the temperature drop in the cooling operation, and each of the maximum and minimum cooling switching calculation means for switching between maximum cooling capacity operation and minimum cooling capacity operation before reaching the high temperature setting value or the low temperature setting value when the capacity operation time reaches a certain time; 0.5 to 1.5 (deg
) When a high high temperature set value is reached, the minimum heating capacity operation is started, and during the temperature decrease in the heating operation, the temperature is lowered to approximately 0 below the set temperature.
．． 5 to 1.5 [deg] switching calculation means for switching to maximum heating capacity operation when a lower low temperature set value is reached; and when each of the maximum and minimum heating capacity operation times reaches a certain time, the high temperature set value Alternatively, the above objective is achieved by an air conditioner comprising switching calculation means for switching between maximum heating capacity operation and minimum heating capacity operation before the low temperature setting value is reached.

[Effect]

In the air conditioner according to the present invention, the heating and cooling capacity generation means generates the heating and cooling capacity, the room temperature detection means detects the room temperature, the heating and cooling capacity calculating means determines the heating and cooling capacity based on the input of the room temperature, and the heating and cooling capacity variable means determines the heating and cooling capacity. The capacity of the cooling/heating capacity generating means is changed based on the output from the cooling/heating capacity calculating means, and the switching calculating means (e) adjusts the temperature by approximately 0.5 to 1.5 [deg] from the set temperature during the temperature rise during cooling operation.
When the high temperature setting value is reached, the maximum cooling capacity operation is performed.
During cooling operation down, the set temperature is 90.5 to 1.5
(deg) When a low low temperature set value is reached, the operation is switched to the minimum cooling capacity operation, and when the maximum and minimum cooling capacity operation time reaches a certain time, the high temperature set value is set. Or, switch between maximum cooling capacity operation and minimum cooling capacity operation before the low temperature setting value is reached, and on the other hand, while the temperature is rising during heating operation, the temperature decreases to about 0 below the set temperature.
．． 5 to 1.5 (deg) When the high temperature set value is reached, the switching calculation means (g) sets the minimum heating capacity operation, and during the temperature decrease in the heating operation, the temperature is lowered to about 0 from the set temperature.
．． When a low temperature setting value of 5 to 1.5 degrees is reached, the switching calculation means (g) switches to the maximum heating capacity operation. In addition, when the maximum and minimum heating capacity operation time reaches a certain time, the switching calculation means (H)
Switch between maximum heating capacity operation and minimum heating operation before the high temperature set value or low temperature set value is reached.

(Embodiment) An embodiment of the present invention will be described below based on the drawings. Fig. 1 is an electric circuit diagram showing an embodiment of an air conditioner according to the present invention, and the figure is a conventional electric circuit diagram ( (Fig. 7).Furthermore, Fig. 2 is a flowchart for controlling the operation of this embodiment, and Fig. 3 is a control characteristic diagram of this embodiment.In Fig. 1, 1 is a power switch. Yes, 2
is a temperature detector for detecting room temperature consisting of a thermistor or something similar that constitutes the room temperature detection means (b),
3 is an A/D converter, 4 is a switch section for operating modes, etc.
Reference numeral 5 denotes a microcomputer, and this microcomputer 5 determines the heating and cooling capacity using the output from the heating and cooling capacity calculating means (c), which determines the heating and cooling capacity manually from the room temperature detection means (b), and the heating and cooling capacity calculation means (c). Cooling and heating capacity variable means (d) that changes the capacity of the generation means (a)
When the temperature is rising during cooling operation, the temperature is approximately 0.5 below the set temperature.
When the high temperature set point that is between 1.5 and 1.5 (deg) higher is reached, the maximum cooling capacity operation is started, and during the cooling operation, the low temperature set point that is approximately 0.5 to 1.5 (deg) lower than the set temperature is reached. When the operating time of each of the maximum and minimum cooling capacities reaches a certain time, the switching calculation means (e) switches to the minimum cooling capacity operation, and when the maximum and minimum cooling capacity operation times reach a certain time, the maximum cooling capacity is switched to the maximum cooling capacity before the high temperature setting value or the low temperature setting value is reached. A switching calculation means (to) for switching between operation and minimum cooling capacity operation, and when the temperature reaches a high temperature set value approximately 0.5 to 1.5 (deg) higher than the set temperature during heating operation, the minimum heating capacity operation is activated. and a switching calculation means (g) for switching to the maximum heating capacity operation when a low temperature set value approximately 0.5 to 1.5 (deg) lower than the set temperature is reached during the temperature decrease in the heating operation; switching calculation means (H) for switching between the maximum heating capacity operation and the minimum heating capacity operation before the high temperature set value or the low temperature set value is reached when each minimum heating capacity operation time reaches a certain time; It is composed of an input circuit 7, a CPU 8, a memory 9, and an output circuit 10. In addition, the input circuit 7 includes a switch section 4 for setting a set temperature, an operation mode, etc., and a room temperature detected by the temperature detector 2, which is connected to an A/D converter.
It is input via the conversion device 3. Heating and cooling capacity variable means (
(b) The heating and cooling capacity variable device 11 changes the rotational speed of the compressor 6 based on the output from the output circuit 10, thereby controlling the heating and cooling capacity.

Next, the operation of this embodiment will be explained with reference to FIGS. 1, 2, and 3 regarding cooling operation.

FIG. 2 is a flowchart including the heating and cooling capacity calculation means stored in the microcomputer 5. First, when the power switch 1 (FIG. 1) is turned on, the flowchart shown in FIG. 2 starts. Set temperature Ts in step 2a
is set.

In step 2b, the cumulative time t is reset, and in step 2c
Make initial settings for maximum cooling capacity and change modes. Next, in step 2d, the room temperature detected by the temperature detector 2 is input, and in step 2f, if the mode is normal, in step 2e, the cooling capacity is calculated and operated from the difference between the set temperature and the room temperature, and the set temperature is reached. to control equipment.

Everything up to this point is completely the same as the conventional example. Next switch 4
This embodiment, which has a characteristic when the operation mode is set to the change mode, will be described below. Even if the operation mode is in the change mode in step 2f, if the room temperature is higher than the high temperature set value Th by 1 (deg) or more in step 2g, the same operation as in the normal mode is performed in step 2e. The high temperature set value Th is a temperature 0.5 to 1.5 (deg) higher than the set temperature.

The reason why the determination is made in step 2g is that if the temperature is extremely higher than the set temperature, it may not fall within the comfortable range. When the operation mode is the change mode and the room temperature becomes lower than Th+1, the operation mode becomes the change mode and the process proceeds to step 2h.

In step 2h, the cooling capacity is determined. If the cooling capacity is the maximum, the process proceeds to step 21, and if the cooling capacity is the minimum, the process proceeds to step 2p. In this embodiment, in the initial stage of the change mode, the maximum cooling capacity is initialized in the static system 2c, so the process proceeds to step 21. In step 21, the operation time is integrated, and in step 2j, if the room temperature Tr is higher than the low temperature set value TJ2, and in step 2, the operation time t is smaller than the fixed time to, step 2I1. Proceed to
Maximum cooling capacity operation is performed and the process returns to step 2j. Therefore, when the room temperature Tr is higher than the low temperature set value T2 and the operating time t is within a certain period of time, the maximum cooling capacity operation is continued.

When the room temperature Tr becomes equal to or lower than the low temperature setting value T1 (
In step 2j), when the operating time t becomes longer than the certain time to, the process branches to step 2, the minimum cooling capacity is set in step 2m, and the operating time t is increased in step 2n.
is reset, and the process returns to step 2d. Next, if the initial setting is the minimum cooling capacity, the operation mode is set to change mode in step 2f, and the room temperature is set to Th+ in step 2g.
Since the temperature is lower than 1 and the minimum cooling capacity is set in step 2h, the process proceeds to step 2p. In step 2p, the operating time t is integrated, and in step 2q, the room temperature Tr is lower than the high temperature set value Th, and in step 2r, the operating time t is
If is smaller than the fixed time to, proceed to step 2S,
Perform minimum cooling capacity operation.

Return to step 2p. Therefore, the temperature setting value T of chamber 4Tr is
h, and when the operating time t is within the fixed time to, the minimum cooling capacity operation is continued.

When the room temperature Tr is equal to or higher than the high temperature set value Th (
In step 2q), when the operating time t becomes longer than the fixed time to, the process branches to step 2r, sets the maximum cooling capacity in step 2t, resets the integrated operating time t in step 2n, and returns to step 2d. As a result, the chamber ATr changes between the high temperature set value Th and the low temperature set value TJ2, rising and falling within a certain period of time to. Moreover, this change is large when the temperature drops during cooling and when the temperature rises during heating (in the case of heating), and small when the temperature rises during cooling and when the temperature falls during heating.

Next, the characteristics of this embodiment when the operating side m<cooling operation) will be explained using FIG. 3.

FIG. 3 is a control characteristic diagram when this embodiment is also operated in a cooling mode. The horizontal axis is time, and the vertical axis is temperature and cooling capacity. Set the operation mode to normal mode and start at time t1.
When the air conditioner starts operating, the room temperature Tr decreases toward the set temperature Ts shown by the broken line. Since the cooling capacity is determined from the difference between the set temperature Ts and the room temperature Tr, the cooling capacity decreases as the room temperature decreases, and eventually the difference between the room temperature Tr and the set temperature Ts becomes smaller and becomes stable along with the cooling capacity. When the change mode is set at time t2, the maximum cooling capacity operation is performed at time t2, and the low temperature set value TI1 is set.

descend to. At time T3, the room temperature Tr changes to the low temperature set value TJ2
When this happens, the minimum cooling capacity operation starts and the temperature rises to the high temperature setting Th. When the room temperature Tr reaches the high temperature set value Th at time t4, maximum cooling capacity operation is started, and the room temperature Tr again decreases toward the low temperature set value TJl. Also, time t8. Like tll, even if the high temperature set value Th or the low temperature set value T1 is not reached, the cooling capacity is switched and operation continues after a certain period of time to has elapsed. In this way, while detecting the room temperature Tr, the maximum cooling capacity and the minimum cooling capacity are repeated without exceeding the maximum value to of the rise/fall time, so the room temperature Tr is determined by the temperature set value Th near the set temperature and the low temperature set value TI1. and within the maximum rise and fall time. This change in room temperature Tr stimulates the temperature-receptive function of the user's skin, and the human body temperature regulating function works. The functioning of the body temperature regulation function can be thought of as activating the user's physiological functions and cerebral activity level. By selecting the high temperature set value Th and low temperature set value TIL so as not to make the user uncomfortable, the user will not feel uncomfortable even if the room temperature Tr changes, and compared to the normal mode where the room temperature Tr is controlled to be constant. creating a comfortable, cozy and healthy environment. In the case of cooling, this change in room temperature is larger when the temperature drops than when the temperature rises, and in the case of heating, the change is larger when the temperature rises than when the temperature falls. In this way, the user can feel a clear sense of comfort due to the large temperature change when the cooling temperature drops and when the heating temperature rises, greatly improving the user experience of the device. Figure 11 shows the human thermal sensation (
The relationship between the sensation of hot and cold) and room temperature Tr was determined from several experiments. It can be seen that compared to curve A where the room temperature is constant, curve B where the room temperature is changed makes the user feel cooler even at the same temperature. When the room temperature Tr is changed, the same thermal sensation can be obtained even if the set temperature is higher than when the room temperature Tr is not changed, which is economically effective.

Although the above embodiment has been described with a selection switch between the normal mode and the change mode, it is also possible to always enter the change mode without a selection switch.

In addition, although all of the above has been described about cooling operation, the same applies to heating operation, and by changing the configuration for cooling operation to the configuration for heating operation, it similarly acts as heating operation, and the same applies to heating operation. It is possible to achieve the following effects. Further, similar effects can be obtained in all air conditioners whose cooling and heating capacities can be varied.

〔Effect of the invention〕

As described above, in this invention, by switching the maximum cooling and heating capacity and the minimum heating and cooling capacity so that the room temperature changes between a high temperature set value and a low temperature set value near the set temperature and without exceeding the maximum rise and fall time, The temperature can be set lower for heating and higher for cooling, which is economical and at the same time stimulates the user's physiological functions and cerebrum, creating an environment where the room temperature is controlled at a constant level. compared to
It has the effect of providing a pleasant and comfortable environment.

[Brief explanation of drawings]

Fig. 1 is an electric circuit diagram of an embodiment of an air conditioner according to the present invention, Fig. 2 is a flowchart showing the operation of Fig. 1, Fig. 3 is a control characteristic diagram of this embodiment, and Fig. 4 is an initial An electric circuit diagram of the first conventional example of an air conditioner, FIG. 5 is a flowchart for controlling the operation shown in FIG. 4, FIG. 6 is a control characteristic diagram of this conventional example, and FIG. 7 is a diagram of the conventional air conditioner. 2. An electric circuit diagram of the conventional example, FIG. 8 is a flowchart for controlling the operation of the second conventional example shown in FIG. 7, FIG. 9 is a control characteristic diagram thereof, and FIG. FIG. 11 is a characteristic diagram showing the relationship between thermal sensation and room temperature. (A>--Heating and cooling capacity generating means (B)...Room temperature detection means (C)...Cooling and heating capacity calculation means (D)----
--- Air conditioning capacity variable means 2 --- Temperature detector 4 --- Switch section 5 --- Microcomputer 6 --- Compressor 11 --- Air conditioning In the drawings of the capacity (generation) variable device, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] An air conditioner characterized by comprising the following means (a) to (h). (a) Cooling and heating capacity generation means that generates heating and cooling capacity and whose capacity can be varied. (b) Room temperature detection means for detecting room temperature. (c) Heating and cooling capacity calculation means for determining the heating and cooling capacity based on the input from the room temperature detection means. (d) A heating and cooling capacity variable means for changing the capacity of the heating and cooling capacity generating means based on the output from the heating and cooling capacity calculation means. (E) During the temperature rise during cooling operation, approximately 0.0% below the set temperature.
When a high temperature setting value of 5 to 1.5 [deg] is reached, maximum cooling capacity operation is performed, and while the temperature is decreasing during the cooling operation,
A switching calculation means that switches to minimum cooling capacity operation when a low temperature set value approximately 0.5 to 1.5 [deg] lower than the set temperature is reached. (f) A switching calculation means for switching between the maximum cooling capacity operation and the minimum cooling capacity operation before the high temperature setting value or the low temperature setting value is reached when the respective maximum and minimum cooling capacity operation times reach a certain time. (G) During the temperature rise during heating operation, approximately 0.0% below the set temperature.
When a high temperature setting value of 5 to 1.5 [deg] is reached, the minimum heating capacity operation is started, and while the temperature is decreasing during the heating operation,
A switching calculation means that switches to maximum heating capacity operation when a low temperature set value approximately 0.5 to 1.5 [deg] lower than the set temperature is reached. (H) A switching calculation means for switching between the maximum heating capacity operation and the minimum heating capacity operation before the high temperature set value or the low temperature set value is reached when the respective maximum and minimum heating capacity operation times reach a certain time.