JPS63286646A - Control of duct type air conditioner - Google Patents

Abstract

PURPOSE:To save power, by a method wherein a thermal load is determined by a set temperature and an indoor temperature to determine the opening degree of a shutter for each room while the rotating speed of a fan is controlled by the condition of the opening degree of the shutters for respective rooms. CONSTITUTION:When there is a difference between an indoor temperature, detected by the indoor temperature sensor 23 of a controller 21, provided in a room, and a set temperature, set in the temperature setter 24 of the controller 21, it is decided whether the difference is larger than a predetermined temperature difference or not. When it is larger, shutters 16, 17 are fully opened and when it is smaller, the shutters are half opened. When there is no temperature difference, the shutters are fully closed and above-described decisions are repeated. Next, a demanding level is determined as 0.5 when the shutters are half opened, as 1.0 when they are fully opened and as 0 when they are fully closed while the rotating speed of a fan is determined to stop it when the demanding level is 0, to run slowly when the demanding level is 0.5, to run in medium speed when said level is 1.5-2.0 and to run in a high speed when the level is 2.5-3.0. According to this method, air-conditioning feeling may be improved by a given air blow-off speed and useless operations of a heat source apparatus and the fan may be eliminated.

Description

Detailed Description of the Invention (Industrial Application Field) This invention is a so-called duct-type device that has one indoor unit and blows and circulates conditioned air to multiple rooms via a blowing and circulation duct. The present invention relates to a method of controlling an air conditioner.

(Prior Art) A method of having one indoor unit and blowing and circulating air-conditioned air to each room through a ventilation and circulation duct is known, for example, as disclosed in Japanese Patent Laid-Open No. 61-91425. It is. In such an example, two ducts are used, and when in cold air mode, one duct blows cold air to each room, and the other duct sucks in air from the room, and when in heating mode, It is configured so that warm air is sent through one duct and blown out to each room, and the air from the room is sucked in through the other duct.The shutters provided at the air outlet and inlet of each room are opened and closed, respectively. Capacity can be controlled by opening it halfway. The document states that the shutter opening/closing control may be controlled manually or electrically.

Further, Japanese Patent Application Laid-Open No. 61-262542 discloses a technical idea of estimating the heat load from the set temperature and the detected temperature and determining the opening degree of the damper of the air outlet of each room based on the estimated heat load. According to this invention.

In order to suppress fluctuations in the duct internal pressure, the damper operation order is determined, and the duct internal pressure is sensed by a pressure sensor installed in the duct, and the rotation of the blower is controlled based on this. The internal pressure of the duct is kept constant.

(Problems to be Solved by the Invention) However, the prior art example does not provide a specific example of controlling a duct type air conditioner. That is, the capacity control is only an example of opening/closing control of the shutters of the air outlet and suction port.

Therefore, when the number of unused rooms increases, the pressure inside the duct increases because the rotational speed of the fan is constant, which increases the amount of air per hour (heat supply amount) supplied from the outlet. However, the noise at the outlet becomes louder, and the control of the air conditioning capacity of one room affects the air conditioning capacity of the other room, resulting in unstable temperature control.

Also, on the rear side, the inconvenience of the previous example is resolved to some extent, but
The blower is a driven device that is determined by a pressure sensor in the duct, and the rotation of the blower is not controlled by the state of the shutter, so it has the disadvantage that there are many unnecessary operations of the blower.

Therefore, it is an object of the present invention to save power by controlling the operation of a blower that keeps the wind speed at the outlet substantially constant based on the state of the shutter provided at the outlet.

(Means for Solving the Problems) The gist of the present invention is to have an indoor unit having a heat exchanger and a blower that generate cold air or hot air, and to pass the cold air or hot air through a plurality of blower and circular air ducts. In a duct-type air conditioner that has shutters on both the outlet and the inlet and supplies and sucks air into the room through a suction device, heat is collected from the set temperature set by the temperature setting device and the room temperature. The load is determined and the opening degree of the shutter in each room is determined, and the required level of the rotational speed of the blower is determined from the opening degree of the shutter in each room, and the rotational speed of the blower is thereby controlled. It's what I did.

(Function) Therefore, the opening degree of the shutter of the air outlet is determined by the thermal load determined from the set temperature set by the temperature setting device and the temperature in the room, and the rotation of the blower is determined based on the opening degree of the shutter in each room. The desired level of speed is determined and the blower is sped up at the desired speed to achieve the objective.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

1 and 2, an example in which the duct type air conditioner 1 is installed in a house is shown, and there are three rooms R□.

R2, R, is air conditioned.

The duct type air conditioner 1 includes an indoor unit 2 having at least a blower, etc., a duct 10 for blowing air to each part E4 Rt to R1, and a duct 10
and a surrounding wind duct 11.

The indoor unit 2 includes a blower 5 and a heat exchanger 6 inside the main body case 4.
, 7, and the heat exchanger 7 is a heater that uses hot water for heating.

The duct 3 includes a blower duct 10 that supplies conditioned air blown from the indoor unit 2 to each room R1 to R3, and each part/a.
Circulating air duct 11 that takes in air from R engineering to R3 and returns it to the indoor unit 2
They are placed as appropriate in the ceiling of the room, etc. A suction device 12 having an air outlet 14 and an inlet 15 is provided at a position corresponding to each part MR□ to R1 of the air duct 3.

The suction/blowing device Fi 212 is provided with a suction port 15 above the case 13 and a blowout port 14 below the case 13, each of which has a shutter 1.
6.17 is placed. The shutters 16 and 17 are rotated in conjunction with each other from fully closed to fully open by respective actuators 18 and 19 as described below. Note that the air outlet 14 is provided with a variable grille 20 that can change the air blowing direction, and although this is also not shown, it is rotated approximately 90 degrees from the horizontal direction to the vertical direction by an actuator.

21 is a controller provided in each part JR□~R3,
The main switch 2 of the controller 21 includes a main switch 22, a room temperature sensor 23, and a temperature setting device 24.
When 2 is pressed, the room temperature and set temperature are input to the control device 25 such as a microcomputer. As a result, the air outlet 14. Shutter 16 of suction port 15
．． The opening degree of the fan 17 and the rotation speed of the blower 5 are controlled according to a program predetermined in the control device 25.

Air outlet 14. An example of controlling the shutters 16 and 17 of the suction port 15 is performed as shown in FIG. That is, starting from a start step 101, the temperature sensor 2 in the room of the controller 21 installed in the room starts in the next step 102.
The room temperature is taken in from step 3, and the set temperature from the temperature setting device 24 is taken in in the next step 103. If it is determined in step 104 that there is a temperature difference between the set temperature and the room temperature, the process proceeds to step 105 and it is determined whether the temperature is equal to or higher than a predetermined temperature (for example, 5° C.).

If the temperature is above the predetermined temperature, the process proceeds to step 107 and the shutters 16, 17 are fully opened, and if the temperature is below the predetermined temperature, the process proceeds to step 106 and the shutters 16, 17 are half-opened.

If there is no temperature difference between the set temperature and the room temperature in step 104, the process proceeds to step 108, and the shutter 16 is closed.
．． 17 is fully opened and steps 106°107.108
After the process is executed, the process proceeds to return step 109, returns to start step 101 again, and the above-mentioned judgment is repeated.

As described above, the shutter 16 in each part mRx to R1
．． 17 is determined, and accordingly, the rotational speed of the blower becomes, for example, as shown in Table 1 below.

Table-1 As shown in Table-1, the opening degree of the shutter 16.17 is 0.5 when half open, 1.0 when fully open, and 0 when fully closed.
The required level is determined as follows, and the rotation speed of the blower is determined accordingly. In other words, if the required level is O, it will stop, if it is 0.5, it will be slow, if it is 1.0, it will be slow, and if it is 1.5 to 2, it will be slow.
．． 0 is medium speed, and 2.5 to 3.0 is high speed.

Although this embodiment shows the case where the number of rooms is three, it can also be applied to control a plurality of other rooms, and even in that case, the required level is 1.0. It is determined by adding 0.5 for half-open and O for closed.

Further, in this embodiment, the shutter is provided at both the air outlet and the suction port and is controlled, but it may also be provided only at the air outlet. In that case, the shutter is controlled as in the previous embodiment, and is controlled in the same manner. The following effects can be obtained.

(Effects of the Invention) As described above, according to the present invention, the heat load is determined from the set temperature and the room temperature, the opening degree of the shutter in each room is determined, and the shutter in each room is set at 14 degrees. Since the required level of the rotation speed of the blower is determined from this, and the rotation speed of the blower is determined by this, it is possible to always blow air from the outlet at a constant blowing speed, and it is possible to fully open the air. , cold air or warm air can be sent to every corner of the room without being affected by the half-open opening, resulting in a good air conditioning feeling.

In addition, since the rotation speed of the blower is controlled according to the condition of the shaft, it can be automatically stopped when all outlets are fully closed, eliminating unnecessary operation of the heat source unit and blower. be.

[Brief explanation of drawings]

FIG. 1 is a dry diagram of a duct type air conditioner showing an embodiment of the present invention, FIG. 2 is a sectional view of a suction device, and FIG. 3 is a flowchart showing an example of shutter control. 1... Duct type air conditioner, 2... Indoor unit, 5...
Blower, 6, 7... Heat exchanger, 12... Blowing device. 14...Blowout port, 15...Suction port, 16.17...
·Shutter. Figure 3 Procedural Amendment (Spontaneous) Date 1, June 1985, Case Indication 1988 Patent Application No. 122080 2, Name of Invention Method for Controlling Duct Type Air Conditioner 3, Person Making Amendment Case and Relationship between patent applicant representative Yukio Itagaki and 1 other person6, a7be;y≧ of the scope of patent claims to be amended, Detailed Description of the Invention Column (1) Amend the scope of claims as shown in the attached sheet do. (2) Mei II + total, page 2, line 1, ``kanfu'' is corrected to ``ren kite.'' (3) The statement i'F, page 2, line 2, ``!0 wind'' is corrected to ``reen kite''. (4) On page 2, line 6 of the specification, the phrase ``Blowing and returning conditioned air through a return duct'' is amended to ``Blowing and returning conditioned air through a ventilation duct.'' (5) On page 4, line 13 of the specification, the phrase ``kanfu'' is amended to read ``renkite.'' (6) On page 5, line 16 of the specification, the phrase "kanfu" is amended to read "renkite." (7) In the third line of page 6 of the specification, the phrase "kanfu" is amended to read "renkite." Claims: An indoor unit having a heat exchanger and a blower that generates cold air or hot air, and the cold air or hot air is sent to a plurality of rooms through a blower and a ventilation duct, with shutters installed at both the outlet and the inlet. In a duct-type air conditioner that supplies and sucks air through a suction device, the heat load is determined from the set temperature set by the temperature setting device and the room temperature, and the opening degree of the shutter in each room is determined. A method for controlling a duct type air conditioner, characterized in that the required level of the rotational speed of the blower is determined from the opening degree of the shutter in each room, and the rotational speed of the blower is thereby controlled. .

Claims (1)

[Scope of Claims] An indoor unit having a heat exchanger and a blower that generates cold air or hot air, and the cold air or hot air is sent to a plurality of rooms through a blower and a circulation duct to both an outlet and an inlet. In a duct type air conditioner that supplies and sucks air through a suction device that has a shutter, the heat load is determined from the set temperature set by the temperature setting device and the room temperature, and the heat load is determined by the shutter of each room. A duct type air conditioner characterized in that the degree of opening is determined and the required level of the rotational speed of the blower is determined from the degree of opening of a shutter in each room, thereby controlling the rotational speed of the blower. control method.