JPH02238240A - Air-conditioner - Google Patents

Abstract

PURPOSE:To assure comfortable environment by controlling air-conditioning capability such that room temperature exchanges between high and low temperature set values in the vicinity of set temperature without exceeding maximum increasing and decreasing times. CONSTITUTION:Once an operation mode is set to an ordinary one and an air-conditioner is started to be actuated at time t1, cooling capability is lowered as room temperature is lowered since the cooling capability is determined by a difference between set temperature Ts and the room temperature Tr. The room temperature Tr has in a short time a small difference between it and the set temperature Ts and is stabilized together with the cooling capability. Once the operation mode is altered to a change mode at time t2, high cooling capability operation is attained at the time t2 and the room temperature is lowered to low temperature set value t1. As the room temperature Tr reaches the low temperature set value T1 at time t3, low cooling capability operation is attained and the room temperature is raised to high temperature set value Th. As the room temperature Tr reaches the high temperature set value Th at time t4, high cooling capability operation is attained, and the temperature Tr is again lowered toward the low temperature set value t1. Further, as are the cases at times t8 and t11, the cooling capability is switched for further operation after the elapse of given time t0 even through the room temperature does not reach the high and low set value Th or T1.

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 for controlling 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 embodiment, and FIG. 9 is a 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. In FIG. 4 of the drawing, 1 is a power switch, 2 is a temperature detector for detecting room temperature, which is made of a thermistor or something similar,
3 is an A/D converter, and 4 is a switch section for setting a set temperature and the like. 5 is a microcomputer, and input circuit 8. It has a CPU 9, 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 human power 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 explained in the case of cooling operation using the flowchart shown in FIG. When the power switch l 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 in step 5d, if the room temperature Tr does not exceed the set temperature Ts, in step 5e, the compressor 6 is operated by the cooling/heating capacity start/stop device 12. will be held. 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 once the air conditioner is turned off, it cannot be restarted for a certain period of time.If the air conditioner is turned off, the room temperature will drop too much. , In part a of the figure, the occupants feel cold, and when they turn it on again, the room temperature rises too much, and part b of the figure
There was a problem with residents feeling the heat.

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 an air conditioner with variable heating and cooling capacity according to the second embodiment. In FIG. 7 of the drawing, the same reference numerals as in FIG. 4 indicate the same or corresponding parts. Further, 5 is a microcomputer equipped with a heating and cooling capacity calculating means for calculating the heating and cooling capacity according to the room temperature detected by the temperature detector 2, and has a human power circuit 8, a CPU 9, a memory 10, and an output circuit 11. ing. 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 l2 controls the rotation speed of the compressor 6 based on the output from the output circuit 11.

Next, we will discuss the operation of the air conditioner according to the second embodiment 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 T' 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 Tr, the cooling capacity is gradually lowered and the room temperature reaches the set temperature Ts.
When the temperature rises above a certain range centered around , 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.

(Problems to be Solved by the Invention) As described above, in conventional air conditioners, the room temperature is always controlled at a constant temperature so that the set temperature 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 value 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 are equal, the body temperature is maintained at an appropriate value, and the body temperature regulation function does not function, so people do not feel cold or hot. FIG. 10 shows the results of the sensory experiment. Usually, the sense of comfort, such as ``comfortable'' and ``uncomfortable,'' 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, the variation Y in people's sense of comfort also tends to increase at moderate temperatures. Also, the level is low and you can see that it will never become comfortable.

As described above, although conventional air conditioners can create an environment that is neither cold nor hot, the problem is that they cannot create a comfortable environment. This invention was made in order to solve the problems of the conventional method as described above, and it is possible to change the room temperature between a high temperature setting value close to the set temperature and a low temperature setting value without exceeding the maximum rise and fall time. By controlling the heating and cooling capacity, the set temperature can be set lower for heating and higher for cooling.
The purpose is to provide a comfortable environment that is economical, stimulates the user's physiological functions and the brain, and is more comfortable than the conventional environment where the room temperature is controlled at a constant level.

(Means for solving the problem) Therefore, in this invention, generating cooling and heating capacity,
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 high temperature setting value reaches a high temperature set value approximately 0.5 to 1.5 (deg) higher than the set temperature during the temperature rise during cooling/heating operation, high cooling is performed during cooling. A switching calculation means that switches to high capacity operation during heating and low heating capacity operation during heating, and a switching calculation means that switches to low heating capacity operation during heating and cooling operation, and during temperature decrease during cooling and heating operation, approximately 0.5 to 1.5 (de
g) switching calculation means for switching to low cooling capacity operation during cooling and switching to high heating capacity operation during heating when a low low temperature set value is reached; The above objective is achieved by an air conditioner comprising switching calculation means for switching between high cooling/heating capacity operation and low cooling/heating capacity operation after the low temperature setting value is reached.

[Effect]

In the air conditioner according to the present invention, the heating and cooling capacity generating means generates the heating and cooling capacity, the room temperature detecting means detects the room temperature, the heating and cooling capacity calculating means determines the heating and cooling capacity by human power of the room temperature, and the heating and cooling capacity is used to generate the heating and cooling capacity. The cooling/heating capacity generating means is used as a variable cooling/heating capacity means by changing the capacity of the cooling/heating capacity generating means, and during the temperature rise during the cooling/heating operation, it is approximately 0.5 to 1.0% lower than the set temperature.
When the high temperature setting value reaches 5 (deg) high, the switching calculation means (e) switches to high cooling capacity operation during cooling,
During heating, it switches to low heating capacity operation, while during cooling/heating operation, the temperature decreases by approximately 0.5 to 1.5 below the set temperature.
(deg) When the low temperature setting value is reached, the switching calculation means (to) switches to low cooling capacity operation during cooling,
During heating, switch to high heating capacity operation. Further, when the high/low cooling/heating capacity operation time reaches a certain time, the switching calculation means (g) switches between the high cooling/heating capacity operation and the low cooling/heating capacity operation before reaching the high temperature setting value or the low temperature setting value.

〔Example〕

An embodiment of the present invention will be described below based on the drawings. FIG. 1 is an electrical circuit diagram showing an embodiment of an air conditioner according to the present invention, and the diagram is the same as the conventional electrical circuit diagram (FIG. 7). Further, FIG. 2 is a flowchart for controlling the operation of this embodiment, and FIG. 3 is a control characteristic diagram of this embodiment. In Figure 1 of the drawings, l is a power switch, and 2
is a temperature detector for detecting room temperature consisting of a thermistor or something similar that constitutes the room temperature detection means (port),
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 of the heating and cooling capacity generating means (a) by human power from the room temperature detection means (portion), and operates a heating and cooling capacity calculating means (ha) which serves as the heating and cooling capacity variable means (ii). ), approximately 0.5 to 1 below the set temperature during temperature rise during air conditioning operation.
．． 5 (deg) When a high high temperature setting value is reached, the switching calculation means (e) switches to high cooling capacity operation during cooling and to low heating capacity operation during heating; 5 to 1.5 (de
g) When the low temperature setting value is reached, the switching calculation means switches to low cooling capacity operation during cooling and high heating capacity operation during heating, and when the high/low cooling capacity operation time reaches a certain time, high temperature setting It includes a switching calculation means (g) for switching between high cooling/heating capacity operation and low cooling/heating capacity operation before reaching the set value or low temperature setting value, and is composed of an input circuit 7, a CPU 8, a memory 9, and an output circuit 10. ing. Further, the input circuit 7 is manually inputted with a switch unit 4 for setting a set temperature, an operation mode, etc., and the room temperature detected by the temperature detector 2 via the A/D converter 3.

Air conditioning capacity variable device 1 which is air conditioning capacity variable means (port)
1 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, high cooling capacity is set and initial settings for the change mode are made. 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, a description will be given of this embodiment, which has a characteristic when the operation mode is changed to the change mode with the switch 4. Even if the operation mode is variable mode in step 2f, the room temperature reaches the high temperature set value Th in step 2g.
If it is 1 degree or more higher than that, the same operation as in the normal mode is performed in step 2e. The high temperature set value Th is 0.5 to f.f. higher than the set temperature. 5 (deg) high 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 variable mode and the room temperature becomes lower than Th+1, the operation mode becomes the variable mode and the process proceeds to step 2h. In step 2h, the cooling capacity is determined. If the cooling capacity is a high cooling capacity, which is an increase of, for example, 20% of the current cooling and heating capacity, the process goes to step 21; Step 2p for cooling capacity
Proceed to. In this embodiment, in the initial stage of the change mode, the high cooling capacity is initially set in step 2c.
Proceed to step 21. In step 21, the operating time is integrated, and in step 2j, if the room temperature Tr is higher than the low temperature set value T2, and in step 2k, the operating time t is smaller than the fixed time to, the process proceeds to step 22, where high cooling capacity operation is performed, Return to step 2i. Therefore, when the room temperature Tr is higher than the low temperature set value TIL and the operating time t is within a certain period of time, the high cooling capacity operation is continued. When the room temperature Tr is equal to or lower than the low temperature set value T2 (step 2j),
If the operating time t is longer than the certain time to, step 2k
Then, the process branches off, sets the cooling capacity to low in step 2m, resets the accumulated operating time t in step 2n, and returns to step 2d. Next, if the initial setting is low cooling capacity, in step 2f the operation mode is the change mode, in step 2g the room temperature is also lower than Th+1, and in step 2h the cooling capacity is set to low, so step 2
Proceed to p. In step 2p, the operating time t is integrated, and in step 2q, if the room temperature Tr is lower than the high temperature set value Th, and in step 2r, the operating time t is smaller than the fixed time to, the process proceeds to step 2s, where low cooling capacity operation is performed. , return to step 2p. Therefore, the room temperature Tr is the high temperature set value Th
lower, and when the operating time t is within the fixed time to,
Continues low cooling capacity operation. Room temperature Tr is high temperature set value Th
is equal to but higher (step 2q), and if the operating time t becomes longer than the certain time to, branching occurs in step 2r, high cooling capacity is set in step 2t, and step 2
Reset the operating time t accumulated with n, and proceed to step 2.
Return to d. As a result, the room temperature Tr repeatedly rises and falls between the high temperature set value Th and the low temperature set value TJ2 within a certain period of time to.

Next, the characteristics during operation control (cooling operation) of this embodiment 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. When the operation mode is set to the normal mode and the air conditioner starts operating at time t, 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, high cooling capacity operation is started at time t2, and the temperature decreases to the low temperature set value TJl. When the room temperature T' reaches the low temperature set value Tu at time t3, low cooling capacity operation starts, and the high temperature setting T
It rises to h. At time t4, the room temperature Tr changes to the high temperature set value Th
At this point, high cooling capacity operation is started, and the room temperature Tr again decreases toward the low temperature set value Tu.

Also, time tI! As l+tl1, high temperature set value Th
Alternatively, even if the low temperature setting 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 chamber iTr, the maximum value to
Since the high cooling capacity and low cooling capacity are repeated without exceeding the set temperature, the room temperature T' changes between the high temperature set value Th and the low temperature set value T1 near the set temperature, 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's 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, low temperature set value TIL, maximum rise/fall time to, high cooling capacity, and low cooling capacity so as not to make the user uncomfortable, the user will not feel uncomfortable even if the room temperature Tr changes. Therefore, compared to the normal mode where the room temperature Tr is controlled at a constant level, the environment becomes more comfortable, pleasant and healthy. 1st
Figure 1 shows the relationship between a person's thermal sensation (feeling of hot and cold) and room temperature Tr during cooling operation, which 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 regarding 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 has the effect of can be done.

[Effects of the Invention] As described above, in this invention, the heating and cooling capacity is controlled so that the room temperature changes between the high temperature setting value and the low temperature setting value in the vicinity of 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, so it is possible to control the room temperature at a constant level. It has the effect of providing a pleasant and comfortable environment compared to the surrounding 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. Electrical 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 its control characteristic diagram, and Fig. 10 is the characteristic showing the experimental results of human comfort feeling. 11 are characteristic diagrams showing the relationship between human thermal sensation and room temperature. (B)・11 Cooling and heating capacity generating means (x) 11 Room temperature detection means (c)11 Cooling and heating capacity calculating means (2) 1.1 Cooling and heating capacity variable means (e), (f). (g) 11 Switching calculation means 2-1 Temperature detector 4-Switch section 5-1 Microcomputer 6.11 Compressor

Claims (1)

[Scope of Claims] An air conditioner characterized by comprising the following means (a) to (g). (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 (a) based on the output from the heating and cooling capacity calculation means (c). (e) Approximately 0 below the set temperature during temperature rise during cooling/heating operation
．． A switching calculation means for switching to high cooling capacity operation during cooling and switching to low heating capacity operation during heating when a high temperature set value 5 to 1.5 (deg) higher is reached. (F) Approximately 0 from the set temperature during the temperature drop during air conditioning operation
．． When a low temperature setting value of 5 to 1.5 (deg) lower is reached, switching calculation means switches to low cooling capacity operation during cooling, and switches to high heating capacity operation during heating. (g) A switching calculation means for switching between high cooling and heating capacity operation and low heating and cooling capacity operation before the high temperature setting value or the low temperature setting value is reached when the high/low heating and cooling capacity operation time reaches a certain time.