JPH042858B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an indoor air conditioning method when air conditioning in a building involves multiple rooms or locations.

[Conventional technology]

BACKGROUND OF THE INVENTION An air conditioner for a building usually includes an air conditioner and a duct, and the air conditioner includes a blower and a cooling or heating device. In order to maintain the indoor temperature at a certain predetermined temperature, cold or hot air is supplied through the duct, but the amount of heat required to supply the room varies depending on the time of day, orientation, and thermal characteristics of the room. . In contrast, conventional methods detect the temperature of a representative room among multiple rooms, compare it with the target temperature, and turn on/off the amount of heat supplied by the cooling or heating device of the air conditioner to make up for the difference. are doing.

The same applies to a large room with multiple rooms, where several zones with different thermal conditions are set and the air conditioning is controlled by detecting the temperature of the representative zone.

[Problem that the invention seeks to solve]

In such conventional control methods, temperatures in rooms other than the representative room are not subject to control, and temperature variations tend to increase from room to room. In order to control the temperature of multiple rooms to the required temperature and reduce the variation in temperature between each room, the temperature of as many rooms as possible is detected, and the air flow is adjusted to supply the required amount of heat to each room. It will be necessary to change the .

For this reason, the equipment requires a means to vary the amount of air supplied to each room, a means to vary the amount of air blown by the air conditioner, a means to vary the amount of heat supplied, etc., making the entire equipment complex and large. At the same time, the system becomes expensive in terms of cost.

The purpose of the present invention is to eliminate the disadvantages of the conventional example,
To provide an indoor air conditioning method that can properly and reliably control multiple locations with a comprehensively simple device while keeping the amount of air blown from an air conditioner constant.

[Means to solve the problem]

In order to achieve the above object, the present invention provides the above-mentioned method when a single air conditioner that always blows a fixed amount of air and blows cold and hot air to a plurality of locations via a duct by controlling the on/off of the heat supply means. A damper is installed in each duct to multiple locations, and
Temperature sensors are provided at multiple locations, and the first step of control is to adjust the opening degrees of the multiple dampers so that when one opens, the other closes, according to the temperature difference at each location based on the temperature sensor. The temperature at each location is adjusted to be uniform by changing the distribution ratio of air flow to the The control means performs logical calculations to control the heat supply means on and off according to the required supply amount at each location, and this on/off control is turned on when any of the temperatures at each location does not reach the set temperature. In addition, the operation of the air conditioner is controlled so that it is turned off when both reach the set temperature, and the first stage control is added to the second stage control and this is repeated. .

[Effect]

According to the present invention, the opening degrees of the dampers provided in the ducts from one air conditioner to each location are related to each other so that one is open and the other is closed, depending on the temperature difference between each location. By adjusting, the distribution ratio of the amount of air blown to each location can be changed, and variations in temperature in each room caused by fluctuations in the amount of heat required to be supplied to each location can be reduced. Thereafter, the air conditioner is controlled on and off to maintain the appropriate temperature while keeping the overall amount of air blown from the air conditioner constant. In this case, the air distribution amount can be changed simply by adding a damper to the duct, and can be realized with simple equipment according to the conditions of the building where the air conditioner is installed.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is an explanatory diagram showing an embodiment of the indoor air conditioning system of the present invention, in which 1 and 2 are each room, 11 is a blower 12, and a heat source that produces cold air and warm air for cooling or heating. The air conditioner 11 has a heat supply device 13, and the rooms 1 and 2 and the air conditioner 11 are connected by ducts 5 and 6 that branch out from the middle. This is a so-called package type device that controls temperature by controlling the heat source on and off.

Temperature sensors 3 and 4 for detecting room temperature are provided in the rooms 1 and 2, respectively, and an operating device 14 for controlling the supply amount on and off is attached to the heat supply device 13 of the air conditioner 11. 5 and 6 are provided with distribution type dampers 7 and 8 for controlling air volume.

In the figure, reference numerals 9 and 10 are damper movable motors (module motors) that adjust the opening degrees of the dampers 7 and 8, and as shown in (b), the temperature sensors 3 and 4 are
The temperature detection output signal is introduced into the drive circuit of the motors 9 and 10 via the differential temperature regulator 15. FIG. 2 is a circuit diagram showing an example of such a differential temperature regulator 15.
The detected temperatures T ₁ and T ₂ of temperature sensors 3 and 4 are expressed as −
The voltage converters 17 and 18 convert the voltage into voltage, the difference ΔV between the respective voltages V ₁ and V ₂ is taken, and the damper movable motors 9 and 10 are controlled by the proportional controller 20 that sets the opening degree according to the difference. It is something that is driven. At this time, the motors 9 and 10 rotate forward and backward, and when one damper opens, the other damper closes.

Further, as shown in (c), the outputs of the temperature sensors 3 and 4 are introduced to the operating device 14 via the heat source control device 16.

The equipment configuration has been described above, and the system of the present invention is performed using such equipment by repeating the following two-stage control.

In the first stage of control, the room temperature is detected by the temperature sensors 3 and 4 of the rooms 1 and 2, and the difference in room temperature is used as a deviation signal by the temperature difference regulator 15, which is installed in the ducts 5 and 6 according to the signal. By operating the movable motors 9 and 10 of the dampers 7 and 8, the opening degrees of the dampers 7 and 8 are changed.

At this time, the opening degrees of the temperature difference regulator 15 and the dampers 7 and 8 are set as shown in Figure 3 as an example, and the larger the difference in room temperature, the lower the room temperature during heating, and the higher the room temperature during cooling. Make sure to blow more air into the room. However, the opening degree of the damper is set to be at least a certain value A%, and the damper is set so as not to be fully closed.

As a result, the air distribution amount changes so that the temperature difference between chamber 1 and chamber 2 becomes smaller. In this case, only the ratio of the amount of air blown to chamber 1 and room 2 changes, and the amount of air blown by the blower 12 remains constant.

In the second stage of control, the room temperature is detected by the temperature sensors 3 and 4 of the chambers 1 and 2, a logical operation is performed by the heat source control device 16, and a signal is sent to the operating device 14 to control the heat supply device 13. control on and off.

As shown in FIG. 4, this heat source control device 16 sets a target value T _D and an operating gap 2d, and sets T _D −
A logical operation is performed in which ON and OFF operations are repeated between d and T _D +d. The flow of calculation is the fifth
As shown in the figure, it is as follows.

That is, in the heat source control device 16, the room temperature of room 1 and room 2 detected by temperature sensors 3 and 4 is
A logical operation is performed on T ₁ and T ₂ , and during cooling, if [(T ₁ ≧T _D + d) ∪ (T ₂ ≧ T _D + d), then “ON”, [(T ₁ ≦T _D − d) If ∩(T ₂ ≦T _D −d), it is set to “OFF”, and during heating [(T ₁ ≦T _D −d)
If ∪(T ₂ ≦T _D −d), “ON”, [(T ₁ ≧T _D +
d) If ∩(T ₂ ≧T _D +d), send an “OFF” signal to the operating device 14.

FIGS. 6 and 7 specifically illustrate the results of such control during cooling and heating, respectively. In the case of Figure 6, the points are T ₁ and T ₂
The point turns OFF when both T _D −d is reached, and the point turns ON when either T ₁ or T ₂ reaches T _D +d. On the other hand, in the case of Figure 7, the point is reached when both T ₁ and T ₂ reach T _D +d.
OFF, the point turns ON when either T ₁ or T ₂ reaches T _D −d.

Then, the present invention repeats the on-off control of the heat source in the second stage as described above by adding and repeating the control to reduce the temperature difference between each room by changing the distribution ratio of the amount of air blown to each room in the first stage. , the intended purpose was to eliminate uneven temperatures in each room, and
Temperature control that maintains the target temperature in each room becomes possible.

Among the results of such control, the predicted temperature change during heating is plotted and shown in FIG.

In addition, although the above-mentioned embodiment showed the temperature control method for two rooms, the same applies to the case of a large number of rooms or the control of each zone of a large room.

〔Effect of the invention〕

As described above, the indoor air conditioning system of the present invention always blows a fixed amount of air, and the air is sent to multiple locations via ducts from one air conditioner that supplies cold and hot air by on/off control of the heat supply means. In such cases, by simply adding simple equipment such as a damper to the duct, it is possible to correct the temperature variations caused by differences in the thermal characteristics of each room, and as a result, the overall air volume from the air conditioner remains unchanged. Appropriate control can be performed to ensure that all rooms reach the required temperature uniformly, and the air conditioner can be flexibly adapted to the conditions of the building in which it is installed.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing an embodiment of the indoor air conditioning system of the present invention, Fig. 2 is a circuit diagram showing details of a differential temperature controller, and Fig. 3 is a diagram showing temperature deviation and damper in the first stage of temperature control. Figure 4 is a diagram showing the relationship between the opening degree, Figure 4 is a diagram showing the relationship between temperature and control state in the second stage control, Figure 5 is a flowchart of calculations in the heat source control device,
Figure 6 is a diagram showing changes during cooling according to the diagram in Figure 5, Figure 7 is a diagram showing changes during heating, and Figure 8 is a diagram showing changes during heating.
The figure is a predicted diagram showing the temperature transition according to the present invention during heating. 1, 2... Room, 3, 4... Temperature sensor, 5,
6...Duct, 7,8...Damper, 9,10...
Damper movable motor, 11...Air conditioner, 12...
...Blower, 13...Heat supply device, 14...Operator,
15... Differential temperature regulator, 16... Heat source control device.

Claims (1)

[Scope of Claims] 1. In the case where a single air conditioner that always blows a constant amount of air and supplies cold and hot air by on/off control of a heat supply means to multiple locations via a duct: A damper is installed in each of the ducts, and temperature sensors are installed in multiple locations.
As for stage control, the opening degrees of the plurality of dampers are adjusted so that when one is open, the other is closed, according to the temperature difference at each location based on the temperature sensor, and the distribution ratio of the amount of air blown to each location is changed. As a second stage of control, the temperature at each location is detected by the temperature sensor, and based on the output, a logical operation is performed by the heat source control means to control the heat supply. The means is controlled on and off according to the required supply amount at each location, and this on/off control is turned on when either of the temperatures at each location does not reach the set temperature, and when both locations reach the set temperature. An indoor air conditioning method characterized by controlling the operation of an air conditioner so that it is turned off at times, and adding first-stage control to the second-stage control and repeating the control.