JPS6030925A - Air conditioning device - Google Patents

Abstract

PURPOSE:To perform a suitable operation for causing a room temperature at a desired time to be set as a predetermined room temperature by a method wherein a rise-up time is produced in response to the preset function and the operation is started when the rise-up time is longer than the period of time remaining until the predertemined time. CONSTITUTION:To a control circuit 5 are connected a time setting circuit 1 for setting a time requiring an air conditioning operation and a room temperature, a temperature setting circuit 2, a room temperature sensor 3 for sensing a room temperature and a correction circuit 4 for setting in four steps the correction in load in response to the size, arrangement and structure, etc. of the air conditioned room. This control circuit 5 performs a comparison and calculation of the signals from the time setting circuit 1, temperature setting circuit 2, room temperature sensor 3 and the correction circuit 4, generates a signal for a relay driver 6 so as to control the operation of each of the units constituting the air conditioning device. When the time setting circuit 1 is operated, a correction value C, predetermined room temperature thetas and a room temperature thetaa are read. And then, the calculation of thetas-thetaa+C having the predetermined room temperature thetas and the sensed room temperature thetaa added to the correction value C is performed. In response to the result of this calculation theta, the rise-up time T2 is calculated by the function set in advance in the control circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an air conditioner that controls room temperature to a set temperature.

[Technical background of the invention and its problems]

BACKGROUND ART Conventionally, a start timer for an air conditioner such as a heat pump type air conditioner or a fan heater is configured to set the time at which the air conditioner is to start operating and a desired room temperature. Such air conditioners require a start-up time for the room temperature to reach the set temperature after the start timer starts operation, so the user should set the start time earlier by the start-up time in advance. Kana (wasn't it?

However, this setting depends on the user's experience and intuition.
When load fluctuations occur due to changes in room temperature or outside temperature, operation cannot be performed as desired by the user.

An example of heating operation of the air conditioner will be described below.

For example, if the operation start timer is set at time A so that the room temperature reaches the set room temperature at time B, as shown in Fig. is required, and the room temperature reaches the set room temperature at time C, which is later than set time B.

When the load increases in this way, the desired room temperature cannot be obtained at set time B, causing discomfort to the user.

In addition, as shown in Figure 2, if the difference between the set room temperature and the room temperature is small and the load is small, the set room temperature will be reached at time earlier than set time B, and electricity will be wasted between time and -B. There was a drawback.

As described above, when all the operation start times are set by relying on the user's experience and intuition, inconveniences occur in response to unpredictable load fluctuations.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an air conditioner that automatically starts operating at an optimal time to bring the room temperature at a set time to the set room temperature.

[Summary of the invention]

The present invention was made by focusing on the fact that the causes of variations in the rise time of an air conditioner are the initial room temperature (the room temperature before air conditioning) and the set room temperature set in the air conditioner.

Below, the fluctuation of the rise time in the air conditioner is explained in the third section.
This will be explained in detail with reference to FIGS.

FIG. 3 is a graph showing changes in initial room temperature and rise time, with the outside temperature being constant and the set temperature being drawn using three parameters: high, medium, and low. In this graph, the rise time decreases as the initial room temperature becomes higher. Further, at this time, the lower the set room temperature is, the shorter the rise time is. This shows that the rise time can almost be determined once the initial room temperature and the set room temperature are determined.

In addition, in an air conditioner that exchanges heat with outside air, as shown in Figure 4, it is not only the initial room temperature and the set temperature (the outside temperature is also one of the factors that fluctuates the rise time. Changes in outside temperature and rise time are shown assuming that the temperature is constant, but as the outside temperature becomes higher, the rise time decreases.

As described above, the start-up time of an air conditioner can be almost predicted once the initial room temperature, set room temperature, and in some cases outside temperature are determined, so the present invention sets the time and sets the room temperature at this set time, At least one of the room temperature and the outside temperature is detected, and the rise time is derived from the detected temperature and the set room temperature using a pre-built function, and when this rise time is greater than the remaining time until the set time, full operation is started. , an air conditioner It that performs optimal IC operation to bring the room temperature at the set time to the set room temperature.
It is.

[Embodiments of the invention]

An embodiment of the present invention will be described with reference to FIGS. 5, 6, and 7. FIG. 5 is a block diagram of this embodiment, which includes a time setting circuit 1 that sets the air conditioning time and the desired room temperature at that time, a temperature setting circuit 2, a room temperature sensor 3 that detects the room temperature, and the correction of the load on the size, arrangement, structure, etc. of the air-conditioned room.
A correction circuit 4 for setting the stage is connected to the control@1 circuit 5. This control circuit 5 compares signals from the time setting circuit 1, temperature setting circuit 2, room temperature sensor 3, and correction circuit 4.
It performs calculations and issues signals to the relay driver 6 to control the operation of each device that makes up the air conditioner.

Next, the operation of the air conditioner of this embodiment during heating operation is shown in flowchart 1 in FIG.

First, the user sets a correction value Ck level determined by the time TI desired by the user, the desired room temperature 08 at this time, and the room in which the air conditioner is installed.

Thereafter, when the time setting circuit 1 is operated, the correction value C1 is read from the correction circuit 4, the set room temperature O8 is read from the temperature setting circuit 2, and the room temperature θa detected by the room temperature sensor 3 is read. and,
The calculation θa ('a + C) is performed by adding the correction value C to the difference between the set room temperature θG and the detected room temperature θa. According to this calculation result θ, the rise time T2 is calculated from a function pre-installed in the control circuit. This function divides the calculation result θ into five divisions θ, 13.13≦0, 15.15≦θ, 17.17≦.
It is determined which of the categories θ and 19.19≦θ it belongs to, and a rise time T2 corresponding to each of the categories to which it belongs is given. The division in this function and the corresponding rise time T2 are determined by the capacity of the air conditioner, the heat capacity of the room,
Approximate calculations are made from heat transfer coefficients, etc., and the optimal values obtained through experimental corrections are incorporated.

Next, the remaining time is calculated. This remaining time calculation is performed by subtracting the time t from the start of operation of the circuit from the time T1 set in the time setting circuit 1 to obtain a value ΔT'r. Then, a comparison is made between the remaining time ΔT and the previously determined rise time T2. As a result of this comparison, when the rise time T2 becomes one less than the remaining time ΔT, an operation start signal is sent to the relay driver 6, and the air conditioner starts operating f.
2 becomes larger than the remaining time ΔT, the process returns to reading the room temperature Oa, and the calculation comparison of the rise time T2 and the remaining time ΔT is repeated.

As described above, the air accumulation system of this embodiment operates, but -
As an example, FIG. 7 shows a case where the set time Ts=6 (hours later), no correction C=0, and the set room temperature θ5-21°C.

In this case, the room temperature θa after 5 hours is approximately 6°C. Therefore, the calculation θ=θ5-Oa-f-C becomes 15, which is 1
Since it belongs to 5≦0〈17, the corresponding rise time is T
2 = 30 (minutes). At this time, the remaining time is △
'I' = 'l't - t = 60 (minutes), so ΔT
The comparison judgment of ≦T2 becomes NO and the air conditioner does not operate, and the process from detection of room temperature Oa to judgment of △T≦T2 is repeated again. After 5 hours and 20 minutes, the room temperature θa =
5℃, the addition θ=16 and the rise time is T2=
30 (minutes).

Also, since the remaining time at this time is ΔT=40 (minutes), △'
If 1≦T2, the judgment is NO and the air conditioner will not operate.

After another 5 hours and 30 minutes, room temperature θa = 4.5℃, calculation 0:= 16.5, △'r::30 (min) and 1
Change. The rise time at this time is T2-30 (minutes), and the judgment of ΔT≦T2 becomes Yes, and the air conditioning charge starts heating operation. Due to this heating operation, air conditioning is performed to reach the set temperature of 21° C. after 6 hours, which is the set time.

As described above, according to the present invention, the rise time is derived at any time from the set temperature, the actual detected room temperature, and the correction value, and this rise time is compared with the machine time up to the preset setting and time. If the remaining time becomes smaller than the rise time, the air conditioner starts operating, so the operation is started in approximately the shortest time for the room temperature at the set time to reach the set room temperature.

Next, as a second embodiment, as shown in the flowchart of Figure 8, a function F(θS, θa,
, C).

(This function F (θ8, θa, C) is an approximate expression determined experimentally.) Then, by comparing T2, which is the calculation result, and the remaining time ΔT, it is determined whether or not to start operation of the air conditioner. are doing. In this embodiment, since the rise time T2 is derived by the function F(θ8, A, C) θ, it is possible to control the operation start time more precisely than in the first embodiment.

〔Effect of the invention〕

According to the present invention, the rise time is derived from the set room temperature and the detected temperature obtained by detecting at least one of the room temperature and the outside temperature, and the operation of the air conditioner is started earlier than the set time according to this rise time. Therefore, even if load fluctuations due to changes in room temperature or outside temperature occur, operation will be performed for approximately the shortest time necessary to bring the room temperature to the set room temperature at the set time when air conditioning is required. Therefore, once the user sets the desired time and room temperature for air conditioning, the air conditioner will automatically operate according to changes in the room temperature or outside temperature, so there is no need for the user to set the time in advance. (It is very convenient to use.

[Brief explanation of the drawing]

Figure 1 is a graph showing the hourly change in room temperature at the start of operation when the air conditioner is under heavy load using a conventional start timer. Fig. 3 is a graph showing the rise time vs. initial room temperature change in a general air conditioner when the outside temperature is constant, and Fig. 4 is a graph showing the rise time - initial room temperature change when the initial room temperature is constant for the same equipment. It is a graph showing changes. Fig. 5 is a block diagram of the part that controls the operation of an air conditioner according to an embodiment of the present invention, Fig. 6 is a flowchart showing the control of the air conditioner, and Fig. 7 shows the changes in room temperature when the air conditioner is used. The graph shown in FIG. 8 is a flowchart showing the control of the air conditioner according to the second embodiment of the present invention. 1... Time setting circuit 2... Temperature setting circuit 3...
Room temperature sensor 4... Correction circuit 5... Control circuit 6.
...Relay driver's representative patent attorney Nori Chika Fumoto Yu (and 1 other person)

Claims (2)

[Claims] (1) A time setting means for setting all the times when air conditioning is required; a room temperature setting means for setting the room temperature at the set time of the time setting means; and a temperature detection means for detecting either the room temperature or the outside temperature. Then, the rise time is calculated from the detected temperature obtained by the temperature detection means and the room temperature setting of the room temperature setting means using a pre-installed function, and the remaining time between this rise time and the time set in the time setting means is calculated. An air conditioner characterized by comprising: a control means that performs a comparison with time and issues an operation start signal when the rising time is shorter than the remaining time. (2) The air conditioner according to claim 1, wherein the control means calculates the rise time by correcting it based on the size, arrangement, structure, etc. of the air conditioned room.