JPS59142342A - Optimum starting method of air conditioner - Google Patents

Abstract

PURPOSE:To enable a room temperature to surely reach a set temperature at a predetermined time by a method wherein the time to issue a starting instruction is determined by subtracting the sum of the delay time ranging from the issue of the starting instruction to the actual starting of an air conditioner, the offset time ranging from the starting of the air conditioner to the starting of room temperature change, and a precooling-heating time required for the room temperature to reach the set temperature from the predetermined time. CONSTITUTION:An air conditioner starts at the time t2 and a room temperature thetar starts to change after the lapse of an offset time To, which is determined by the thermal inertia of a room, at the time t3 and reaches a set temperature theta5 after the lapse of a precooling-heating time Tp, which is obtained based upon the estimated value of room temperature change coefficient, at the predetermined time t4. Accordingly, when the predetermined time t4, at which the room temperature thetar reaches the set temperature thetas, is determined, the time t1 to issue a starting instruction can be calculated according to the following formula: t1=t4-Td-To-Tp whereby, the delay time Td and the offset time To are constants for every air conditioner to be stored in memory based upon actual results and the like.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an optimal starting method for effectively operating an air conditioner such as a fan coil unit.

[Prior art]

Generally, when starting an air conditioner, in order to ensure that the room temperature reaches the set temperature at the time when the target room starts to be used, a predetermined time for the room temperature to reach the set temperature is determined according to the start time of use, and the heat capacity of the room is set. The startup time is determined earlier than the predetermined time, taking into account the room temperature change coefficient determined according to
Depending on this startup time, the control device sends a startup command to the air conditioner.

However, in reality, there is thermal inertia in the room, and the room temperature does not start changing immediately even when the air conditioner is turned on, and there is an offset time between when the air conditioner is turned on and when the room temperature changes. However, in the past, this offset time was not taken into account, resulting in the drawback that the room temperature did not reach the set temperature at a predetermined time.

[Object and structure of the invention]

The present invention has the purpose of fundamentally eliminating the drawbacks of the conventional art, and in order to achieve this purpose, in the first invention,
The delay time from when the startup command is sent until the air conditioner actually starts, the aforementioned offset time, and the precooling heat time from when a change occurs in the room temperature until the room temperature reaches the set temperature are calculated from a predetermined time. On the other hand, in the second invention, in consideration of the case where there is no delay time, the offset time and the pre-cooling heat time are subtracted from the predetermined time, and thereby the start command is sent. The time shall be determined.

EXAMPLES] Hereinafter, the present invention will be described in detail with reference to figures showing examples.

□Figure 1 is a block diagram of the entire configuration, including the main controller MCT
TE terminal equipment such as keyboards and cathode ray tube display devices.
The main controller MCT is connected to the terminal controller TCTI = TCT7L through a common transmission path, and data can be freely input by the operator and outputted to the operator by transmitting and receiving data with these terminals. It is connected to and transmits and receives data between them.

Further, to each terminal controller TCTI to TCTn, a temperature sensor T, a humidity sensor H, a status contact of a fan motor FM, etc. are connected as local sensors, and a motor control valve MV for controlling the air conditioner is connected. and electromagnetic switch MS etc. are connected, and each terminal controller TC
T1 to TCTm make control decisions based on data transmission and reception with the main controller MCT, each detection force of each sensor T and H, and the status contact of the fan motor FM, and control the motor valve Mv and electromagnetic switch. The air conditioner is locally controlled by sending a control output to an MS or the like.

('ml device MCT and terminal controller TCTI-TCTh consist of a processor such as a microprocessor and a memory, etc., and the processor executes instructions stored in the memory and accesses predetermined data to the memory. The memory of the terminal controllers TCTl to 1'CTn stores control data, and based on this, control such as starting and stopping the air conditioner is performed. It becomes.

FIG. 2 is a diagram showing the state of change in the room temperature θr with respect to the transition of time t. Although a startup command is sent from the terminal controller Tα at the sending time tl, each air conditioner starts at the same time and the power load situation becomes excessive. After a delay time Td provided to avoid this, the actual start-up control output is sent out, and at time t2 the air conditioner starts up.
The change in room temperature θr begins at time t3 after an offset time To determined according to the thermal inertia of the room, and at a predetermined time t4 after a precooling heat time 'rp determined based on the estimated value of the room temperature change coefficient, the room temperature changes. or reaches the set temperature θB.

Therefore, if the predetermined time t4 at which the room temperature θr reaches the set temperature θS is determined, the start command sending time t
l can be found.

tl=t4-Td-To-Tp...
(1) Delay time Td and offset time TO
are conditions determined for each air conditioner, and these values can be stored in memory based on actual results, etc.
Since the precooling heat time 'rp changes depending on the season, etc., it may be determined by the following equation.

Tp=lθS-θR1/Ki...
t21θR...Room temperature Ki at time t8...Estimated value of room temperature change coefficient, Kl
is determined by the following formula. , Ki-α・K1-1+(
1-α)Ki-t...(3)α...
・Correction coefficient △ K1-1 ... Estimated room temperature change coefficient value K1- of the previous day
1... Actual measured value of room temperature change coefficient on the previous day, Ki-
x is Δθ-1θB-θR1 and Δt= on the previous day
It may be determined by the following formula based on t+-ta.

K1-1=Δθ/Δt (4)
That is, in the terminal controller TCT, (1) to (4)
In addition to calculating the expression, the sending time tl is calculated using the expression (1).
If we determine this, store it in memory, perform a timing operation, and send out a start command when the sending time ti matches the current time, the room temperature or will surely reach the set temperature θB at the predetermined time 1+. will be reached.

Note that if the delay time Td is not provided, the air conditioner will start immediately in response to the sending of the starting command, so the sending time tl in this case will be expressed by the following equation.

tl = tΦ-To-Tp...
(5) However, depending on the conditions, K1 may be fixed, or the offset time TO may be modified sequentially depending on the situation. The present invention can be modified in various ways, such as using the configured control circuit. .

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, the room temperature reliably reaches the set temperature at a predetermined time, so it can be used to start an air conditioner that performs cooling or heating, or both. is obtained.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention; FIG. 1 is a block diagram of the entire configuration, and FIG. 2 is a diagram showing the relationship between time changes and changes in room temperature. TCTI - TCT le... terminal controller, MS ・
...Electromagnetic switch, r...Temperature sensor, Td
...delay time, TO...offcent time, 'r
p... Pre-cooling heat time, tl... Delivery time, 1
+...Predetermined time, θr...room temperature, θS...set temperature.

Claims (1)

[Scope of Claims] g) A delay time from when a start command is sent to an air conditioner until the air conditioner actually starts, and an offset time from when the air conditioner starts until a change in room temperature occurs. and calculate the pre-cooling heat time from when the room temperature changes until the room temperature should reach the set temperature based on the estimated value of the room temperature change coefficient, and An optimal method for starting an air conditioner, characterized in that the sending time of the starting command is determined by subtracting the delay time, the offset time, and the precooling heat time from the predetermined time when the start command should be sent. (2) In response to sending a start command to the air conditioner, the offset time from when the air conditioner starts until a change in room temperature occurs is stored, and after the change occurs in the room temperature, the room temperature returns to the set temperature. The pre-cooling heat time until the desired temperature is reached is determined based on the estimated value of the room temperature change coefficient, and the offset time and the pre-cooling heat time are subtracted from the predetermined time at which the room temperature should reach the set temperature to determine the sending time of the startup command. An optimal method for starting an air conditioner, characterized by determining the following.