JPH0155388B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an air conditioner, particularly to a heating air conditioner.

[Prior Art] Air conditioners have been used for heating and cooling homes, workplaces such as factories, and vehicles such as automobiles and trains. PID control or ON-OFF control has been used to control the temperature inside the air-conditioned room using these air conditioners.

Here, PID control refers to the following operations.

The target temperature in the air-conditioned room is Sv,
If the actual temperature in the air-conditioned room is Tv, the deviation ε is expressed as ε=Sv−Tv. Based on this deviation, the manipulated variable Mv can be determined using the following equation (1).

_Mv =K can be controlled by changing it toward the target temperature Sv.

However, when heating is performed using such PID control, the amount of heating air blown from the air conditioner is set as a manipulated variable at the beginning of the air conditioning operation in order to raise the temperature in the low-temperature air conditioned room. If the amount of heat is increased, or even if the amount of heat is increased while keeping the amount of air constant, the ability to supply the amount of heat may be insufficient, or the temperature in the air-conditioned room may be low, resulting in cold air being blown out and causing harm to humans. This often caused discomfort.

To solve these problems, a device has been proposed that adjusts the air flow rate so that the temperature of the blown air reaches a predetermined value during the initial stage of heating, and adjusts the air flow rate so that the indoor temperature reaches a predetermined value during the original air conditioning control. (Patent No. 56-40040).

However, in this device as well, the decision to shift from the initial heating control to the original air conditioning control was based on the temperature of the blown air. Therefore, in reality, the temperature of the blown air is always controlled to a predetermined value, so the temperature of the blown air does not rise significantly, and the timing to shift to the original control cannot be obtained. In other words, the invention disclosed in JP-A-56-40040 did not achieve its original purpose. In the disclosed invention, even if the control is forcibly shifted to the original one, the room temperature at that time is unknown. Therefore, if a smooth transition cannot be made and there is a large gap between the set temperature and the actual room temperature, there is a risk that the amount of air blown will suddenly increase, causing cold air to blow out.

[Objective of the Invention] The object of the present invention is to reduce discomfort to indoor workers caused by cold air blowing out at the beginning of heating processing by an air conditioner, so-called draft, and to further reduce the discomfort caused by the original control of air conditioning. An object of the present invention is to provide an air conditioner that can smoothly connect to feedback control to a certain predetermined room temperature.

[Structure of the Invention] The gist of the present invention is to provide: a heat exchange means for contacting and exchanging heat with inhaled air; and an air volume adjustment means for adjusting the amount of the heat exchanged air blown into the air-conditioned room. and an air temperature detection means for detecting the temperature of the heat-exchanged air; an indoor temperature detection means for detecting the temperature inside the air-conditioned room; and a temperature detected by the air temperature detection means and the indoor temperature detection means. If the temperature in the air-conditioned room is lower than a predetermined temperature, the air volume adjusting means is driven to adjust the air flow rate so that the temperature of the heat exchanged air reaches the set temperature; , arithmetic control means for driving the air volume adjusting means to adjust the amount of air blown so that the temperature inside the air conditioning room reaches the set temperature when the temperature inside the air conditioning room is equal to or higher than a predetermined temperature; The air conditioner is characterized by:

Next, the basic configuration of the present invention is shown in FIG.

Here, M1 represents heat exchange means, M2 represents air volume adjustment means, M3 represents air temperature detection means, M4 represents indoor temperature detection means, and M5 represents calculation control means.

The air absorbed by the air conditioner M6 having the above-described configuration is heated by the heat exchanger M1, and then supplied into the room to be air conditioned with the amount of air blown being adjusted by the airflow adjustment means M2. The arithmetic control means M5 detects the temperature of the air after passing through the heat exchange means M1 and before being discharged into the air-conditioned room by the air-blowing temperature detection means M3, and also detects the temperature inside the air-conditioned room by the air temperature detection means. M4 detects the temperature, and based on the temperatures of the two, arithmetic processing is performed to drive the air volume adjusting means M2, thereby adjusting the amount of heat-exchanged air blown into the air-conditioned room.

When the temperature inside the air conditioned room is below a predetermined temperature, the air flow rate is adjusted so that the temperature of the heat-exchanged air reaches the set temperature. When the temperature is higher than the predetermined temperature, control is performed to adjust the amount of air blown so that the temperature in the air-conditioned room becomes the set temperature.

As described above, in the present invention, the following two control modes () and () are switched and executed with the predetermined temperature in the air-conditioned room as the boundary.

() If the temperature in the air-conditioned room is less than the specified temperature,
A mode in which the air flow rate is adjusted so that the temperature of the heat-exchanged air reaches the set temperature.

() A mode in which the air flow rate is adjusted so that the temperature in the air-conditioned room is equal to the set temperature when the temperature in the air-conditioned room is higher than the temperature in the air-conditioned room (that is, feedback control of the temperature in the air-conditioned room as the original control).

In this way, during the initial stage of heating, blowing out of cold air is prevented by the control in (). Then, when the temperature in the air-conditioned room rises sufficiently, the control shifts to () and the original control is executed. the above(),()
Switching between each mode is performed by monitoring the temperature in the air-conditioned room.

Therefore, the original air conditioning control is not entered while the gap between the room temperature and the set temperature remains large as in the conventional case, and a smooth mode transition without blowing out cold air is possible.

[Example] Next, an example of the present invention will be described based on the drawings.

FIG. 2 shows a schematic configuration diagram of an embodiment of the present invention.

In the air conditioner 1, an air purifying filter 3, a heat exchanger 5, an air volume adjusting device 7, and a blowing hole 9 are arranged in an air flow passage 2 from the air suction side. The air sucked may be outside air or indoor air that is air-conditioned.

Hot water stored in a heat storage tank 13 is supplied to the heat exchanger 5 by a pump 15 . This hot water is supplied to a two-way valve 1 provided on the hot water outlet side of the heat exchanger 5.
The flow rate is regulated by 7. In addition to the two-way valve 17, a needle valve may be used for hot water circulation control. The air volume adjusting device 7 includes a variable blade angle fan 7a whose blade angle is variable and a motor 7b that rotates the variable blade angle fan 7a. Reference numeral 19 denotes an arithmetic control circuit, including a water temperature sensor 21 that detects the temperature of the hot water that has passed through the heat exchanger 5, an air temperature sensor 23 that measures the temperature of the heat-exchanged air blown out from the air volume adjustment device 7, and The detection signal from the room temperature sensor 25 is input, and the signal is transferred from the heat storage tank 13 to the heat exchanger 5.
A drive signal is sent to the valve opening amount adjusting device 27 of the two-way valve 17 that adjusts the flow rate of hot water supplied to the fan 7a and the blade angle adjusting device 29 that adjusts the blade angle of the variable blade angle fan 7a of the air volume adjusting device 7 that adjusts the air flow rate. is outputting. In addition to the air volume adjustment device 7 as described above, the blade angle of the fan 7a is fixed, and the motor 7b is operated without using the blade angle adjustment device 29.
Even if a rotational speed adjustment device is provided, the air volume adjustment device can be used.

Of the devices described above, the heat exchanger 5 corresponds to the heat exchange means, the air volume adjustment device 7 corresponds to the air volume adjustment means, the air temperature sensor 23 corresponds to the air temperature detection means, and the room temperature sensor 25 corresponds to the indoor room temperature sensor 25. This corresponds to the temperature detection means, and the arithmetic control circuit 19 corresponds to the arithmetic control means.

Further, the combination of the two-way valve 17 and the valve opening amount adjusting device 27 corresponds to the flow rate adjusting means, and the arithmetic control circuit 19 corresponding to the arithmetic control means also serves as the flow rate control means. A control circuit as a flow rate control means may be provided separately from the arithmetic control circuit 19.

The arithmetic control circuit 19 is constituted by a microcomputer as shown in FIG. This arithmetic control circuit 19 includes a CPU 31, a ROM 32 which is a fixed memory in which control programs and various data necessary for arithmetic processing are stored, a RAM 33 which is a memory for temporary storage, and a memory that retains memory even after the power is turned off. It is equipped with a backup RAM 34, which is a memory whose power is backed up by a special battery, an input/output port 35, output ports 36 and 37, and a bus line 38 connecting each element.

Buffer circuits 39 and 4 are connected to the input/output port 35.
0, 41, the detection signals of the water temperature sensor 21, the air temperature sensor 23, and the room temperature sensor 25 are inputted via the multiplexer 42 and the A/D converter 43, and the drive circuits 44, 45 are inputted via the output ports 36, 37.
A drive signal is output to the drive circuits 44 and 45.
receives the drive signal and outputs a drive current to the valve opening amount adjustment device 27 and the blade angle adjustment device 29. Furthermore, 46
represents a clock circuit that sends a clock signal serving as a control timing to the CPU 31, ROM 32, RAM 33, etc. at predetermined intervals.

Next, an example of control by the arithmetic control circuit 19 applied to the embodiment described above will be explained.

FIG. 4 shows a flowchart of an example of the control.

Here, 110 represents an initial setting step, in which the arithmetic control circuit 19 also initializes various data, flags, counters, etc. used in arithmetic operations. 120 represents a step in which the previous control mode is set to 1. For example, it is set by setting a flag indicating that the previous control mode was 1. 130 represents a step of determining the control mode based on the detection signal from the room temperature sensor 25. 140 represents a step for determining whether the control mode is set to 1 or not. 150 is control mode 1
represents the step of performing arithmetic processing to control the 160 represents a step for determining whether the control mode is set to 2 or not. 170 represents a step for performing arithmetic processing for controlling in control mode 2. 180 represents a step for performing arithmetic processing for controlling in control mode 3.
190 represents a step of reading the water temperature into the memory as Tw based on the detection signal from the water temperature sensor 21. 200 represents arithmetic processing for performing PID control of the two-way valve 17 for hot water circulation control. 210 represents a step in which output processing is performed based on the control data calculated in each of the above-mentioned corresponding steps.

FIG. 5 shows details of the process for determining the control mode in step 130 above.

Here, 310 stores the temperature inside the air conditioner in memory based on the signal detected from the room temperature sensor 25.
Represents the step of reading as Tr. 320 represents a step for determining whether the previous mode is 1 or not. That is, after the process of step 210 in FIG. 4, the process returns to step 130 again to form a loop, and it is determined whether the mode of the process immediately before returning to step 130 is 1. 330 represents a step of determining whether the indoor temperature Tr is equal to or higher than a predetermined temperature T _L. 340 represents the step of setting the control mode to 1. 350 represents a step for setting the control mode to 2. 360 represents a step for determining whether the previous mode was 2 or not.
370 represents a step of determining whether the room temperature Tr is equal to or higher than a predetermined temperature Tu. 380 has control mode 3
Represents the step to be set. 390 is the indoor temperature Tr
This represents the step of determining whether or not the temperature _TLL is higher than or equal to a predetermined temperature TLL. 400 represents a step for setting the control mode to 2. 410 represents a step for setting control mode 1. For 420, the indoor temperature Tr is the predetermined temperature Ts
This represents the step of determining whether or not the above is true. 430 represents the step of setting the control mode to 2.
440 represents the step of setting the control mode to 3.

The above-described respective predetermined temperatures have a relationship of Tu>Ts>T _L >T _LL .

There are two predetermined temperatures, T _L and T _LL , because
This _is provided as _a hysteresis to prevent hunting between control modes.
This is the predetermined temperature when transitioning from 1 to 1.

The respective temperatures are, for example, Tu=20℃, Ts=19℃,
T _L = 15°C, T _LL = 13°C.

Next, FIG. 6 shows the contents of the arithmetic processing in control mode 1.

Here, 510 represents a step of reading the air blowing temperature as Tf based on the detection signal from the air temperature sensor 23. 520 represents a step of determining whether or not the air conditioner 1 has just been started by checking a flag. 530 adjusts the blade angle amount of the variable blade angle fan 7a of the air volume adjustment device 7, and adjusts the air volume Q to the maximum air volume.
Represents the step set to 100%. In other words, set the air flow to the maximum. 540 represents a step of determining whether or not the air blowing temperature Tf is equal to or higher than a predetermined temperature _T10 .
550 is a new Q by adding a predetermined amount a to the current air volume Q.
represents the step to be set as . 560 represents a step of subtracting a predetermined amount b from the current air flow rate Q and setting that value as a new Q. 570 represents a step of determining whether the air volume Q is greater than 100% as a result of calculation. 580 has air volume Q of 100%
Represents the step to be set. 590 represents a step for determining whether the air volume Q is equal to or greater than its lower limit value _Q0 . Q ₀ is generally about 10 to 15%, but may be 0%, that is, the air blowing is stopped. 600 represents a step for setting the value of _Q0 .

Next, FIG. 7 shows the content of the arithmetic processing in control mode 2 at step 170 in FIG. 4. Here, 610 represents the PID calculation of the air volume Q. The PID calculation refers to the process of calculating the value of the air volume Q using equation (1) described in the prior art section.

In this case, Q is calculated so that when the indoor temperature Tr is lower than the target temperature T ₀ , the air volume is increased, and when Tr is higher than the target temperature T ₀ , the air volume is decreased.
T ₀ is set, for example, to 180°C. 620 represents a step for determining whether the air volume Q is greater than or equal to the lower limit value _Q0 . 630 represents a step for setting the air volume Q to the lower limit value _Q0 .

Next, FIG. 8 shows the content of the arithmetic processing in control mode 3 in step 180 of FIG. 4. Here, 710 represents the step of setting the lower limit value Q ₀ of the air volume Q. 720 represents a step in which the hot water circulation control two-way valve 17 is fully closed.

First, when the air conditioner 1 of this embodiment starts operating, step 110 shown in FIG. 4 is executed to perform initial settings. Next, in step 120, the previous control mode is set to 1. Then step 130
is executed. Turning now to FIG. 5, first, at step 310, the indoor temperature Tr is read. Next, in step 320, it is determined whether or not the previous control mode is 1. However, in the first process, the previous control mode was set to 1 in step 120 of FIG. It is determined as “YES”. Next, step 330 is executed, and it is determined whether the indoor temperature Tr read in step 310 is equal to or higher than a predetermined temperature _TL . If Tr is less than T _L and the determination is "NO", the control mode is set to 1 in step 340, and the process in step 130 ends.

Next, returning to FIG. 4, it is determined in step 140 whether the control mode is 1 or not. Step 130 above
Since the control mode is set to 1 in step 340, it is determined as "YES", and then in step 150
is executed, and the arithmetic processing of control mode 1 is performed.

This process is executed as shown in FIG. 6 above. First, in step 510, the air blowing temperature Tf is read.
Next, in step 520, it is determined whether or not the operation of the air conditioner 1 has just started. Since it has just started, it is determined as "YES",
Next, in step 530, the air volume Q is set to a value of 100%. In other words, the blade angle of the fan 7a of the air volume adjustment device 7 is adjusted by the blade angle adjustment device 29 so that the air volume is maximized. Next, in step 540, it is determined whether the air blowing temperature Tf is equal to or higher than a predetermined temperature _T10 . If the air coming out of the heat exchanger 5 has not yet been sufficiently heated and Tf is less than _T10 , the determination is "NO", and then step 560 is executed and the air volume Q is set smaller by b. Ru. Then step 590
In step 560, it is determined whether or not the value of Q set in step 560 is greater than or equal to the lower limit value _Q0 . If it is greater than or equal to the lower limit, it is determined as "YES" and Q remains unchanged, and if it is less than that, it is determined as "NO". It is determined that _Q0 is set to Q, and
The process of step 150 ends. Next, returning to Fig. 4, the water temperature Tw is read in step 190.
At step 200, two-way valve 1 is set based on the water temperature Tw.
PID control calculation of the valve opening amount of 7 is performed. This PID
In the control calculation, the valve opening amount is controlled using the same equation as equation (1) described in the prior art. PID control is performed to increase the opening area of the valve 17 when the temperature of the water discharged from the heat exchanger 5 is lower than the target temperature, and to decrease the opening area of the valve 17 when the water temperature is higher than the target temperature. is being carried out.

Next, in step 210, the blade angle adjusting device 2 is adjusted according to the value of the air volume Q based on the determined control mode.
9 to adjust the air volume by the air volume adjustment device 7, and further, drive the valve opening amount adjustment device 27 in accordance with the control amount of the two-way valve 17 obtained in step 200 above to adjust the air volume of the two-way valve 17. Processing is performed to control the amount of valve opening. After this, the process returns to step 130.

If the process of step 130 is performed again next time,
If the indoor temperature Tr is still below the predetermined temperature T _L , the control mode is set to 1 again in step 130. Next, when the arithmetic processing of control mode 1 is performed in step 150, a value in which the air volume Q is further reduced by b is set as the air volume Q in step 560, and a two-way valve for keeping the water temperature constant is set. 17 of
PID control calculations will be performed.

As long as Tr<T _L , the air volume gradually decreases by repeating the above process. This corresponds to the state from time tm ₀ to tm ₁ in FIG.

Here, the top graph in Figure 9 represents the amount of change in air volume Q over time, the second represents the change in air temperature Tf over time, the third represents the change in indoor temperature Tr over time, and the fourth represents the change in indoor temperature Tr over time. is a graph showing changes in water temperature Tw over time.

Until time tm ₁ , the air volume Q decreases stepwise, the air temperature Tf gradually increases, the room temperature Tr also gradually increases, and the water temperature Tw only decreases initially and remains constant at the predetermined temperature T ₂₀ thereafter. It can be seen that it has changed. After the air volume Q continues to decrease by b for each process, if the air volume Q reaches a value less than the lower limit value _Q0 , in step 590 during the calculation process of control mode 1 in FIG. If the answer is NO, step 600 is then executed, and the air volume Q is set to the lower limit value _Q0 .

After this, even if the same process is repeated, the air volume Q will be set to a constant state at the lower limit value _Q0 .
This applies between time points tm ₁ and tm ₂ in the graph of FIG. During this period, Q is constant at Q ₀ , and furthermore, Tf
is gradually increasing, and Tr is also gradually increasing. Tw is
Constant at T ₂₀ .

After such processing, the air blowing temperature Tf reaches the predetermined value T ₁₀
If the above is reached, select "YES" at step 540 in step 150 for performing the arithmetic processing of control mode 1.
will be judged. Step 550 is then executed,
A process is performed in which a value obtained by adding a predetermined value a to Q is further set as the air volume Q. From this, it can be seen that the air volume Q gradually increases after the time _tm2 when Tf becomes _T10 or more, as shown in FIG. Further, the air blowing temperature Tf is maintained at a constant level at approximately the predetermined value _T10 . In addition, the indoor temperature Tr is gradually increasing. The water temperature Tw is still maintained at a constant level. However, since the air volume Q is increasing during this time, the opening amount of the two-way valve 17 is controlled to be larger.

After this, when the room temperature Tr becomes equal to or higher than the predetermined temperature _TL due to an increase in the room temperature Tr, the previous control mode is changed in step 320 of the control mode determination process in FIG. 5 based on the room temperature in step 130 in FIG. Since it is 1, the determination is ``YES'', and then in step 330 it is determined whether Tr is greater than or equal to <sub>TL</sub> . Since Tr is greater than or equal to <sub>TL</sub> , the determination is ``YES'', and step 350 is then executed, and the control mode is set to 2. Therefore, in FIG. 4, the determination in step 140 is ``NO'', and the determination in step 160 is ``YES'', and the process proceeds to step 170, which is the control mode 2 arithmetic processing.

In the graph of FIG. 9, this corresponds to time tm ₃ .

Moving on to the calculation process in step 170, first, in step 610 of FIG. 7, a PID calculation of Q is performed.
In this PID calculation, the control amount is determined by the difference between the target temperature T ₀ and the above-mentioned temperature, as shown in equation (1) above, and the control amount in this case is the adjustment of the air volume Q. In this process, if the actual room temperature Tr is higher than T ₀ , the air volume Q is controlled to decrease. Conversely, if Tr is lower, the air volume Q is controlled to increase.

Next, the process moves to step 20, and if Q is greater than or equal to _Q0 , the process of step 170 is immediately terminated. If Q is less than Q ₀ , the value of Q ₀ is set for Q, and the process of step 170 ends. Then, in step 210, the air volume is adjusted according to the calculated Q.

After this, when the process returns to step 130 again, it is determined in step 320 that the previous control mode was 2, so it is determined as "NO", and then in step 360, the previous control mode is 2. Since there is, the determination is ``YES'' and step 370 is executed.
Here, it is determined whether the indoor temperature Tr is equal to or higher than a predetermined temperature Tu, and if it is not equal to or higher than Tu, a "NO" determination is made. Then, in step 390, it is determined whether or not Tr is equal to or higher than _TLL . Here, if Tr is T _LL or more, it is determined as "YES", and then step 400 is executed, the control mode is further set to 2, and step 400 is executed.
Finish processing 130.

After this, similarly, the determination in step 160 is ``YES'', and the arithmetic processing of control mode 2 in step 170 is executed. After that, Tr becomes more than Tu or
Control mode 2 will continue unless it becomes less than _TLL .

During this period, it corresponds to tm ₃ to tm ₄ in FIG. Q temporarily decreases in order to raise Tr to T ₀ , but when Tr reaches approximately T ₀ , Q becomes approximately constant. During this period, Tf rises once due to a decrease in Q, but remains almost flat as Q becomes constant.
Tw is also constant.

Normally, in this control mode 2, the inside of the air-conditioned room 11 is maintained in a comfortable state.

However, if sudden heat generation occurs in the air-conditioned room 11 for some reason, the indoor temperature
Tr may exceed a predetermined temperature Tu. In this case, since the previous control mode was 2 in step 360 of FIG. 5, it is determined as "YES".
Next, in step 370, since Tr is equal to or greater than Tu, a determination of "YES" is made, and then in step 380, the control mode is set to 3.

As a result, "NO" is determined at steps 140 and 160 in the flowchart of FIG. 4, and step 180 is then executed to perform control mode 3 arithmetic processing. This calculation process is the 8th
As shown in the figure, step 710 is performed in which the lower limit value _Q0 is set for the air flow rate Q, and then step 720 is performed in which the two-way valve 17 for hot water circulation control is fully closed. Then, as shown in FIG. 4, step 210 is executed and control output processing is performed.

If step 130 is executed again after this,
At step 360, since the previous control mode has already been set to 3, the determination is "NO", and then at step 420, it is determined whether Tr is higher than the predetermined temperature Ts. Since Tr is greater than or equal to Ts, the determination is ``YES'', and step 440 is then executed, and the control mode continues to be set to 3 in the same way. Thereafter, the state of control mode 3 continues unless Tr becomes less than Ts.

The processing during this period represents the state after time _tm5 shown in FIG. During this period, Q is fixed at ₀ , Tf increases once but gradually decreases, and Tr also increases once but gradually decreases.

After this, when Tr becomes less than Ts at tm ₆ , a determination of "NO" is made in the process of step 420 in FIG. 5, and then step 430 is executed to set the control mode to 2. As a result, "YES" is determined at step 160 in the flowchart of FIG. 4, and step 170 is then executed to perform control mode 2 arithmetic processing. In other words, we will return to the PID calculation of Q. The state after time tm ₆ in FIG. 9 is shown.

Furthermore, although not shown in FIG. 9, after returning to control mode 2, if the room temperature Tr becomes less than the predetermined temperature _TLL , a determination of "NO" is made in step 390 in FIG. 5, and then step 410 is made. is executed and the control mode is set to 1. In other words, the air volume Q is controlled so that the air blowing temperature Tf is kept constant.

As mentioned above, from time tm ₀ in Figure 9
Since the room temperature Tr is quite low during tm ₃ ,
Performing control in control mode 1 to perform control adapted to the heat supply capacity of the air conditioner, and
Prevents cold air from blowing out (draft) and prevents worker discomfort. Also from time TM ₃ to TM ₅
By performing control in control mode 2 throughout the period, the indoor temperature can be controlled to an appropriate target temperature T ₀ . Furthermore, by performing control processing in control mode 3 between time points tm ₅ and tm ₆ , the amount of air blown can be minimized and energy can be saved. Also, as shown in Figure 10, when the control mode is increasing from 1, 2, and 3, the boundary between the control modes is set at room temperature.
For Tr, T _L and Tu are used, and conversely, when the control mode decreases from 3 to 2 to 1, the boundaries of the control modes are Ts and T _LL , and by providing hysteresis when the control mode changes, the difference between the control modes is This can prevent hunting and the like.

The switching judgment between each mode is based on the value of the room temperature Tr. Then, Mode 2 shifts from Mode 1 at the initial stage of heating or Mode 3 when the temperature rises abnormally.
In (original control), the room temperature Tr is feedback-controlled to the target temperature To. Like this mode 2
Since the room temperature Tr is checked at the time of mode transition and the transition to room temperature control is determined based on the result, a large gap does not occur between the room temperature Tr and the target temperature To at the time of mode transition. Therefore, the transition is smooth and no shocks such as cold air blowing out occur during the transition.

[Effects of the Invention] As detailed above, the air conditioner of the present invention has the following features: a heat exchange means for contacting and exchanging heat with the inhaled air; An air flow rate adjusting means for adjusting the amount of air being blown; an air temperature detecting means for detecting the temperature of the heat-exchanged air; an indoor temperature detecting means for detecting the temperature in the air-conditioned room; the air blowing temperature detecting means; If the temperature inside the air-conditioned room is less than a predetermined temperature based on the temperature detected by the indoor temperature detection means, the air volume adjustment means is driven so that the temperature of the heat exchanged air reaches the set temperature. On the other hand, when the temperature inside the air-conditioned room is higher than a predetermined temperature, the air volume adjustment means is driven to adjust the airflow amount so that the temperature inside the air-conditioned room reaches the set temperature. Equipped with arithmetic control means, it is possible to prevent drafts in the initial stage of heating and to perform control appropriate to the heat supply capacity, and in steady state, the room temperature can be controlled close to the set value, making it possible to always provide comfortable heating. .

In particular, switching between each mode is performed by monitoring the temperature within the air-conditioned room.

Therefore, the original air conditioning control is not entered while the gap between the actual room temperature and the set temperature remains large as in the conventional case, and a smooth mode transition without blowing out cold air is possible.

[Brief explanation of drawings]

Fig. 1 is a basic configuration diagram of the present invention, Fig. 2 is a schematic system diagram showing an embodiment of the present invention, Fig. 3 is a block diagram of its arithmetic control circuit, and Fig. 4 is an application to the arithmetic control circuit. FIG. 5 is a detailed flowchart of the control mode determination part, FIG. 6 is a detailed flowchart showing the calculation process of control mode 1, and FIG. 7 is the calculation of control mode 2. Detailed flowchart showing the process,
FIG. 8 is a detailed flowchart showing the arithmetic processing of control mode 3, FIG. 9 is a graph showing the processing operation of this embodiment, and FIG. 10 is a graph showing mode setting conditions. 1...Air conditioner, 5...Heat exchanger, 7...
Air volume adjustment device, 11... Air-conditioned room, 17...
Two-way valve, 19...Arithmetic control circuit, 21...Water temperature sensor, 23...Air temperature sensor, 25...Room temperature sensor, 27...Valve opening amount adjustment device, 29...Blade angle adjustment device.

Claims (1)

[Scope of Claims] 1. A heat exchange means that contacts the drawn air and performs heat exchange; an air volume adjustment means that adjusts the amount of the heat exchanged air blown into the air conditioned room; an air temperature detection means for detecting the temperature of the air; an indoor temperature detection means for detecting the temperature inside the air-conditioned room; based on the temperatures detected from the air temperature detection means and the indoor temperature detection means; When the temperature inside the air-conditioned room is lower than a predetermined temperature, the air volume adjustment means is driven to adjust the air flow rate so that the temperature of the heat-exchanged air reaches the set temperature; an arithmetic control means for driving the air volume adjusting means to adjust the amount of air blown so that the temperature in the air-conditioned room reaches the set temperature when the temperature of the air conditioner is equal to or higher than a predetermined temperature; harmonization device. 2. The heat exchange means is supplied with heat by the circulation of the heat medium, and the flow rate adjustment means adjusts the flow rate of the heat medium circulating through the heat exchange means, and the temperature of the heat medium discharged from the heat exchange means is adjusted to its set temperature. 2. The air conditioner according to claim 1, further comprising a flow rate control means for controlling said flow rate adjustment means so that said flow rate adjustment means is controlled such that said flow rate adjustment means is controlled so that said flow rate adjustment means is controlled so that said flow rate adjustment means is controlled so that said flow rate adjustment means is controlled to have a flow rate control means. 3. When the temperature in the air-conditioned room is higher than the second predetermined temperature, which is a temperature exceeding the predetermined temperature, the calculation control means drives the air volume adjustment means to adjust the air flow to the lower limit value, and causes the heat exchange means to circulate. 3. The air conditioner according to claim 1, wherein the air conditioner controls the flow rate of the heat medium to zero by driving a flow rate adjusting means for adjusting the flow rate of the heat medium.