JPH079306B2 - Air conditioner - Google Patents

Description

TECHNICAL FIELD The present invention relates to an air conditioner that controls a sensible temperature to a constant level.

[Conventional technology]

Conventionally, the air conditioner, for example, during heating operation, compares the set temperature with the detected indoor temperature, when the indoor temperature is higher than the set temperature, stops the operation of the compressor, in the opposite case,
The compressor was operated to control the room temperature.

In addition to the control to bring the room temperature close to the set temperature,
Considering the outside temperature at the beginning and end of the cooling season,
An air conditioner has been proposed in which the cooling motion at bedtime is controlled by a timer to prevent the cooling of the sleep due to an unnecessary blowing operation. FIG. 7 shows a control circuit diagram of this kind of air conditioner disclosed in, for example, Japanese Patent Publication No. 59-50899. In the figure, 51 and 52 are first resistors for room temperature, which are connected in series between the power supply terminal + B and the ground and are composed of a thermistor or the like, and form a room temperature detecting portion. 53 has one contact 53a, the room temperature sensor 5
An analog switch connected to the connection point between 1 and the first resistor 52, 54 is a temperature setting variable resistor connected between the other contact 53b of the analog switch 53 and the ground, and the other contact
One end connected to 53b is the power supply terminal + via the second resistor 55.
It is connected to B and forms a temperature setting part. 56 is an A / D converter connected to the analog switch 53, 57 is a one-chip microcomputer connected to the analog switch 53 and the A / D converter 56, and controls the operation of the fan motor and compressor motor described later. Form.
58 and 59 are the power supply terminal + B and the microcomputer 5, respectively.
An operation switch and a stop switch connected between 7 and one end of each of which is connected to the microcomputer 57 is grounded via the third and fourth resistors 60 and 61. 62 and 63 are timer switches and timer time setting slide switches connected between the power supply terminal + B and the microcomputer 57, and 64,65,66,67,68,69,70 are connection between the timer switch 62 and the microcomputer 57. Fifth to eleventh resistors respectively connected between each one terminal of the point and the slide switch 63, each connection point of the microcomputer 57 and the ground, and the timer switch 62, the slide switch 63, and the resistors 64-70. Form a timer setting section.

Reference numeral 71 denotes a switching first transistor whose base is connected to a first output terminal 57a of the microcomputer 57 via a biasing twelfth resistor 72, and an emitter of which is grounded. 73 is a thirteenth resistor connected between the base and emitter of the first transistor 71, and 74a is a power supply terminal + B and a first resistor.
A coil of the first relay connected between the collector of the transistor 71, a first diode 75 connected in parallel with the coil 74a of the first relay, and 74b, 76 both power supply terminals + B, -B.
The first relay contacts and the fan motor are connected in series between them, and a fan motor power supply control section is formed by the transistor 71 and the first relay.

Reference numeral 77 denotes a second switching transistor whose base is connected to the second output terminal 57b of the microcomputer 57 via the fourteenth biasing resistor 78, and the emitter of which is grounded. 79 is a fifteenth resistor connected between the base and the emitter of the second transistor 77, and 80a is a power supply terminal + B and a second resistor.
The coil of the second relay connected between the collector of the transistor 77, 81 is the coil of the second relay, the second diode is connected in parallel to 80a, and 80b and 82 are both power supply terminals + B,
It is a contact of a second relay and a compressor connected in series between −B, and a compressor power supply control unit is formed by the transistor 77 and the second relay.

The microcomputer 57 includes a temperature comparison means for comparing the temperature of the room temperature detecting unit input via the converter 56, that is, the detected room temperature with the set temperature of the setting unit input via the converter 56, and timer setting. Timer counter means for counting the timer time set by the unit, and
It is provided with a temperature comparison means, a discrimination processing means to which the output of the timer setting section is input, and the like.

Further, the temperature comparison means has a memory for holding the set temperature, and the discrimination processing means discriminates based on the output of the temperature comparison means when the room temperature is equal to or higher than the set temperature and when the room temperature is lower than the set temperature by 2 ° C. It has a function, a function of discriminating whether or not the timer is operating, and a control function of controlling the start / stop of the two motor power feeding control units based on the outputs of the both discriminating functions and preset data of the control means.

Next, the operation will be described based on the flowchart shown in FIG.

First, turn on the power and set the analog switch 53 to the other contact.
When the variable resistor 54 is connected to 53b and adjusted, the voltage divided by the second resistor 55 and the variable resistor 54 is used as a set temperature by the analog switch 53 and the A / D converter 56 to be the temperature comparison means of the microcomputer 57. The input temperature is input and stored in the memory of the temperature comparison means. Now, as shown by the alternate long and short dash line in FIG.
-50) It is assumed that the memory stores 27 ° C.

Next, when the operation switch 58 is pressed at time t0 shown in FIG. 9 (S-51), a fan motor drive command signal is sent from the discrimination processing means of the microcomputer 57 to the first transistor 71 via the first output terminal 57a. The output causes the first transistor 71 to turn on, and the coil of the first relay from the power supply terminal + B.
Current flows through the first transistor 71 through 74a, the contact 74b of the first relay is closed, and the fan motor 76 is powered (S-52). As shown in FIG. The motor 76 is driven to perform the blowing operation.

Next, when the timer time is set to, for example, t5 by the slide switch 63 and then the timer switch 62 is pressed (S-53), the timer counter means of the microcomputer 57 starts time measurement (S-54) to start the timer operation. It starts (S-55), and until the time set at t5 reaches the timer setting time (S-56), whether or not the room temperature detected by the room temperature sensor 51 is higher than the stored set temperature of 27 ° C is micro. The temperature is compared by the temperature comparing means of the computer 57 (S-57).

Then, as shown in FIGS. 9 (a) and 9 (c), when the set temperature is higher than 27 ° C. (S-57), the second output terminal 57b is output from the microcomputer 57 determination processing means to the second output terminal 57b.
The compressor drive command signal is output to the transistor 77 of the second relay, the second transistor is turned on, current flows through the coil 80a of the second relay, and the contact 80b of the second relay is closed, so that the compressor 8
2 is powered and the compressor 82 is driven to perform cooling operation (S-58, 59).

On the other hand, when the room temperature becomes lower than 27 ° C. (S-57), the discrimination processing means of the microcomputer 57 outputs a compressor stop command, the compressor drive command signal at the second output terminal 57b disappears, and the second relay The coil 80a is not energized and its contact 8
0b is opened, and the drive of the compressor 82 is stopped (S-60).

That is, the room temperature is 2 ° C lower than the preset temperature of 27 ° C by 25 ° C.
Until the temperature reaches (S-61, S-62), the discrimination processing means of the microcomputer 57 controls the start / stop of the compressor 82 based on the output of the temperature comparison means. The fan motor 76
Continues to be driven (S-52).

Then, during the timer operation (S-61), when the room temperature drops to 25 ° C. at t3 ′ and becomes 2 ° C. lower than the set temperature of 27 ° C. (S-62), at this time, the determination processing means determines that the fan motor and the compressor are operating. The stop command is output, and the fan motor and compressor drive command signals from the output terminals 57a and 57b are no longer output, and both motors 76 and 82 are output as shown in FIGS. 9B and 9C.
Is stopped and the air conditioner is completely stopped (S-63), as shown in FIG. 9 (a), from t3 'to t5, that is, t3'.
From the time to the end of the timer setting time (S-64)
If the room temperature does not return to the set temperature of 27 ° C. (S-66), both motors 76 and 82 continue to stop and the drive mechanism is held in a complete stop.

Further, as shown in FIG. 10, the slide switch 63 sets the timer time to T3, and within the timer setting time T3, the room temperature becomes 25 ° C. at T1 and the room temperature becomes again from the set temperature of 27 ° C. at T2. If it becomes higher, from T0 to T2, the operation is the same as in the case of FIG. 9 described above, from T1 to T2.
Sometimes the fan motor 76 also stops.

Then, at T2 when the room temperature again rises to 27 ° C., the determination processing unit releases the stop command for the fan motor 76, the fan motor drive command signal is output again from the output terminal 57a, and the fan motor 76 is driven again. The discrimination processing means also releases the compressor stop command and the compressor 82 is driven again. Thereafter, the start / stop of the compressor 82 is controlled in the same manner as in the case of FIG. 9 until the timer setting time is reached, and the timer setting time is set. Then (S-56), both motors 76, 82 are stopped and the air conditioner is completely stopped (S-67).

In addition, in the case of normal operation in which the time is not set by the timer, S-50 to S-55, S-57, S-58, or S-6 in FIG.
The operations of 0 and S-59 are repeated until the stop switch 59 is pressed.

Therefore, according to the above-mentioned conventional example, the room temperature is 27
Until the temperature drops by 2 ° C to 25 ° C by a predetermined temperature, the fan motor 76 continues to be driven and the compressor 82 is controlled to start / stop selectively between the cooling operation and the air blowing operation as in the conventional case. However, when the room temperature drops to 25 ° C, not only the compressor 82 but also the fan motor 76 is stopped to prevent unnecessary blow operation and save electricity, and to cool down due to unnecessary blow during timer operation. Can be prevented.

When the room temperature once drops to 25 ° C and then rises again to 27 ° C, the fan motor 76 and the compressor 82 are driven again before the end of the timer setting time to selectively perform the cooling operation and the air blowing operation. The temperature can be controlled at room temperature.

[Problems to be solved by the invention]

Since the conventional air conditioner is configured as described above, even if the room temperature reaches the set temperature of the air conditioner, people in the room may feel colder or hotter than that temperature, and It was difficult to control properly.

The present invention has been made to solve the above problems, and an object thereof is to bring the sensible temperature close to the set temperature.

[Means for solving problems]

An air conditioner according to the present invention has a room temperature detecting means for detecting an indoor temperature, a temperature sensitive resistance element, and a heater for heating the temperature sensitive resistance element. Temperature rise value detection means for detecting the temperature rise value of the affected temperature sensitive resistance element, and sensible temperature calculation means for calculating the sensible temperature based on the output of the room temperature detection means and the output of the temperature rise value detection means. A temperature setting means for setting the room temperature, and a control means for controlling the operation of the compressor based on the difference between the set temperature set by the temperature setting means and the sensible temperature calculated by the sensible temperature calculating means. It is a thing.

[Action]

The air conditioner according to the present invention controls the room temperature by controlling the operation of the compression based on the difference between the set temperature set by the temperature setting means and the sensible temperature calculated by the sensible temperature calculating means, thereby setting the sensible temperature at the set temperature. Approach to.

Example of Invention

An embodiment of the present invention will be described below with an example of heating operation.
In FIG. 1, 58, 59 and 82 indicate the same parts as in FIG.
Reference numeral 1 denotes a temperature sensitive resistance element as a room temperature detecting sensor. Two
Is a temperature rise value detector, temperature sensitive resistance element 2r and heater 2h
The temperature sensitive resistance element 2r is heated by the heater 2h, and the increased temperature is detected by the temperature sensitive resistance element 2r.
At this time, if the temperature of the wall or floor is lower than room temperature,
Since the radiant energy outflow from 2r increases and heat is taken away,
Further, since the temperature-sensitive resistance element 2r is cooled when the airflow speed, that is, the wind speed, the temperature rise value detected by the temperature-sensitive resistance element 2r becomes lower than that when the temperature of the wall or floor is the same as room temperature and there is no airflow. That is, the temperature rise value detector 2 can simultaneously detect the influence of the radiant energy outflow amount and the air flow velocity by detecting the temperature rise value of the temperature sensitive resistance element 2r. On the other hand, when the temperature of the wall or floor is the same as room temperature and there is no airflow, the temperature rise value of the temperature sensitive resistance element 2r is used as the reference temperature rise value, and the memory 3m of the microcomputer 3 described below is used.
I remember it. Reference numeral 3 denotes a microcomputer as a sensible temperature calculating means and a control means, which is composed of an input circuit 3i, an output circuit 3o, a CPU 3p and a memory 3m, and is connected from the temperature sensitive resistance element 1 through an A / D converter 4 and an input circuit 3i. Input room temperature and A / D from the temperature rise value detector 2
The sensible temperature is calculated from the temperature rise value of the temperature-sensitive resistance element 2r input via the converter 5 and the input circuit 3i. For example, in the case of heating operation, when the calculated sensible temperature is higher than the set temperature, the compressor power is fed. The operation of the compressor 82 is stopped via the circuit 6, and at the opposite time, the compressor 82 is operated.
The memory 3m stores information on the reference temperature increase value.

Next, the operation in the heating operation will be described based on the flowchart of FIG.

When the operation switch 58 is turned on (STEP-1), the room temperature is detected by the temperature sensitive resistance element 1 (STEP-2), and the temperature of the temperature sensitive resistance element 2r heated by the heater 2h is detected by the temperature rise value detector 1. Elevated value is detected (STEP-3). Next, the microcomputer 3 calculates the difference between the reference temperature rise value stored in the memory 3m and the temperature rise value of the temperature sensitive resistance element 2r, and the temperature obtained by multiplying this temperature difference by a constant is calculated from the detected room temperature. By subtracting the radiant energy outflow rate and airflow velocity, the total detected temperature is calculated (STEP-4). The difference between the reference temperature rise value and the temperature rise value of the temperature sensitive resistance element 2r is the temperature sensitive resistance element 2r due to the influence of the radiant energy outflow amount and the air velocity.
Corresponds to the decrease in temperature. Further, just as the temperature of the temperature-sensitive resistance element 2r decreases due to the influence of the radiant energy outflow amount and the air flow velocity, the temperature-sensitive resistance actually sensed by a person relative to room temperature also decreases due to the influence thereof, so the temperature-sensitive resistance element 2r There is a certain relationship between the decrease in the temperature of s and the decrease in the sensible temperature with respect to room temperature. Therefore, the sensible temperature can be obtained by using the detected decrease in the room temperature and the temperature of the temperature-sensitive resistance element 2r.
That is, the total detected temperature calculated as described above is substantially equal to the sensible temperature. Then, the calculated total detected temperature is compared with the set temperature (STEP-5), and the comparison result is
When the total detected temperature is higher than the set temperature, the microcomputer 3 stops the operation of the compressor 82 via the compressor power feeding circuit 6 (STEP-6). Conversely, when the total detected temperature is lower than the set temperature. , Operate the compressor 82 (STEP-7),
Make the total detected temperature equal to the set temperature.

If the stop switch is turned on during room temperature control (STEP-8),
The compressor 82 is stopped by the microcomputer 3 (ST
EP-9), the compressor 82 waits until the operation switch 58 is turned on.

Room temperature when heating the air conditioner, total detected temperature,
The relationship between the wall temperature, the air flow, and the operation of the compressor will be described with reference to FIG. When the airflow velocity occurs (t1), the room temperature is kept as it is, but the temperature rise value detector 2 is cooled, and the total detected temperature is lowered. This temperature drop is a temperature equal to the cold sensation felt by the air conditioner user at the wind speed of the airflow. The air conditioner operates the compressor 82 until the total detected temperature reaches the set temperature (t1 to t2), and stops the compressor 82 when the total detected temperature becomes the same as the set temperature (t2). After that, when the total detected temperature falls below the set temperature (t3), the compressor is operated again. When the air velocity disappears (t4), the total detected temperature rises by a temperature equal to the cold sensation felt by the wind velocity. Then, if the total detected temperature is higher than the set temperature, the compressor is stopped, and if it is lower than the set temperature, the operation of operating the compressor is continued (t4 to t5). When the wall temperature drops (t5), the room temperature is the same, but the temperature rise value detector 2
Is cooled and the total detected temperature is lowered. This temperature drop is a temperature equal to the cold sensation that an air conditioner user feels due to an increase in radiant energy emission to the wall. The air conditioner operates the compressor until the total detected temperature reaches the set temperature (t5 to t6), and stops the compressor when the total detected temperature becomes the same as the set temperature (t6). After that, when the total detected temperature falls below the set temperature (t7), the compressor is operated again.

In the above embodiment, the reference temperature increase value information is information stored in advance in the memory 3m, but the reference temperature increase value detected as described below may be used.

Explaining based on the flowchart of FIG. 4 (in the flowchart, STEP-1 to STEP-9 are the same as the operation shown in FIG. 2), the stop switch 59 is turned on (STEP-8), and the compressor 82 After operation stop (STEP-9), does t1 hour elapse (S
TEP-10), or when the operation switch 58 is turned on before the lapse of t1 time (STEP-11), the temperature-sensitive resistance element 1 and the temperature rise value detector 2 respectively detect the room temperature and the temperature-sensitive resistance element 2r. The temperature is detected (STERP-12, 13) and the reference temperature rise value is calculated by the microcomputer 3 (STERP-1
4) Store this value in memory 3m (STEP-15). Since there is little variation in the reference temperature rise value obtained in this way, the precision error in comparison with the room temperature by the temperature sensitive resistance element 1 is small, and more accurate temperature control can be performed.

In the above embodiment, an example in which the total detected temperature is calculated by the room temperature and the temperature rise value of the temperature sensitive resistance element 2r, and the room temperature is controlled based on the calculated temperature has been described. Also in the above, when the outside air temperature drops, the temperature at the feet also drops and the temperature near the head rises, so that humans feel as if they are in the air at a temperature lower than the average room temperature.

FIG. 5 shows an example of an air conditioner improved in this respect as well. In the drawings, the same or corresponding parts are designated by the same reference numerals. Explaining based on the flowchart shown in FIG. 6,
The temperature sensing resistance element 1 is used to measure the room temperature (STEP-20), the temperature rise value detector 2 is used to measure the temperature rise value of the temperature sensing resistance element 2r (STEP-21), and the temperature sensing resistance is set via the A / D converter 7. Element 8
Since the outdoor temperature is detected by (STEP-22), the temperature closer to the sensible temperature can be calculated (STEP-23), and the room temperature can be controlled to an appropriate temperature.

〔The invention's effect〕

As described above, according to the present invention, the room temperature detecting means for detecting the room temperature, the temperature sensitive resistance element and the heater for heating the temperature sensitive resistance element are provided, and the radiant energy outflow amount and the air flow heated by the heater are provided. Temperature rise value detecting means for detecting a temperature rise value of the temperature sensitive resistance element affected by speed, and a sensible temperature for calculating a sensible temperature based on an output of the room temperature detecting means and an output of the temperature rise value detecting means. Calculation means,
A configuration including temperature setting means for setting a room temperature and control means for controlling the operation of the compressor based on the difference between the set temperature set by the temperature setting means and the sensible temperature calculated by the sensible temperature calculating means Therefore, the compressor can be operated to control the room temperature based on the difference between the set temperature set by the temperature setting means and the sensible temperature calculated by the total detected temperature calculating means, and the sensible temperature can be brought close to the set temperature.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is an operation flowchart, FIG. 3 is a timing chart of a compressor,
FIG. 4 is an operation flow chart, FIG. 5 is a view showing another embodiment, FIG. 6 is an operation flow chart, FIG. 7 is a view showing a conventional control circuit example of an air conditioner, and FIG. 8 is an operation flow chart. 9 (a)-(c) and 10 (a)-
(C) is a timing chart. In the figure, 1 ... Temperature-sensitive resistance element, 2 ... Radiant airflow mixing detector, 3 ... Microcomputer, 82 ... Compressor,
Is. In the drawings, the same reference numerals indicate the same or corresponding parts.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Sakuo Sugawara 2-14-40 Ofuna, Kamakura-shi, Kanagawa Mitsubishi Electric Corp. Product Research Laboratory (72) Inventor Hiroyuki Umemura 3-18-1 Oga, Shizuoka-shi, Shizuoka No. Mitsubishi Electric Co., Ltd. Shizuoka Works (72) Inventor Kenji Matsuda 3-18-1, Oka Shizuoka City, Shizuoka Prefecture Mitsubishi Electric Co., Ltd. Shizuoka Works (72) Inventor Hidenori Ishioka 3-18, Oka Shizuoka City, Shizuoka Prefecture No. 1 in Shizuoka Plant of Mitsubishi Electric Corporation (56) Reference JP-A-49-68546 (JP, A) JP-A-56-91138 (JP, A)

Claims (1)

[Claims] 1. A room temperature detecting means for detecting an indoor temperature, a temperature-sensitive resistance element and a heater for heating the temperature-sensitive resistance element,
The temperature rise value detecting means for detecting the temperature rise value of the temperature sensitive resistance element which is heated by the heater and is influenced by the radiant energy outflow amount and the air flow velocity, the output of the room temperature detecting means and the temperature rise value detecting means. On the basis of the difference between the sensible temperature calculated by the sensible temperature calculating means for calculating the sensible temperature based on the output, the temperature setting means for setting the room temperature, and the temperature set by the temperature setting means. An air conditioner comprising: a control unit that controls the operation of the compressor.