JPS6186817A - Preheating/precooling controller - Google Patents

Abstract

PURPOSE:To prevent the contamination of air due to an overheating or overcooling in a preheating/precooling control mode or a cut-off operation also in said control mode by using the open air in case the difference of enthalpy is less than a fixed level between the inside and the outside of a building. CONSTITUTION:The preheating operation time is calculated from the outside temperature, the room temperature, a solar radiation quantity, the achievement time of the previous day, etc. It is decided from a calendar, the outside temperature, etc. whether the present heating period is close to the midwinter or an intermediate season. In the midwinter the start time for air conditioning operation is accelerated for a heating period. While the blow-out temperature is reduced by a fixed level in mid course of the preheating time to eliminate an overheat condition during the preheating period. Furthermore the calculated preheating operation time is extended by a fixed degree. Then the open air enthalpy is compared with the indoor enthalpy to decide whether the intake of the open air is possible or not during a preheating period. If the intake of the open air is possible, the cut-off operation is released for an indoor air conditioning system. While said comparison of the enthalpy is continued for the fixed period of time when the intake of the open air is impossible. Then the start time for air conditioning operation is accelerated after the fixed period of time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a preheating and precooling device that optimizes the indoor temperature by the start time of normal operation.

[Technical background of the invention and its problems] In order to achieve the optimum temperature with the minimum operating time of the air conditioning system in conventional preheating and precooling control, the indoor air conditioning system was operated at a reduced rate and no outside air was taken in. In other words, if you operate the ventilation fan and air conditioner with the air damper and outside air intake damper closed and the ventilation damper open, ventilation will flow into the room through the ventilation damper and the air will flow to that size. Since outside air cannot be brought in, the air conditioning load is shifted to the eaves, and the temperature inside the room reaches a constant temperature faster than during normal operation.

It's easy to do.

This f''L is the pre-ripening and pre-cooling time, when there are few people in the room and the air in the room is polluted (1-14 crabs stand under the condition of 11 fewer people, and normal continuous air conditioning starts in an actual office building etc.) In the past, when most people were indoors, the four types of indoor air pollution increased during preheating and precooling, and the effects on the human body, etc.1: Audiences were missed.

By setting the conventional preheating and precooling control to the lowest temperature in the summer and the lowest temperature in the winter,
The optimum temperature is reached within a short operating time of the air conditioning system.
That's what I was doing.

For example, set the supply air blowout temperature to 5" in the summer.
By setting the temperature to 17°C, the flow rate of cold water was increased compared to the previous year, and by setting the temperature to, for example, 50°C in winter, the flow rate of steam and water was increased compared to the normal amount.

This is an old office building where 1S worth of people enter the room during the preheating and precooling period before the normal air conditioning operation starts, and my father gets too cold and there are other problems such as being too hot in the winter. It had the drawback of giving me pleasure.

If the air outlet temperature during preheating control is, for example, 50°C, and the normal air outlet temperature is set to, for example, 35°C, σ becomes too high during preheating. ) Even if there is no flea, the air outlet temperature during normal air conditioning operating hours such as during heating in intermediate seasons such as spring and autumn, 1 is also set to 25℃, for example, and is the air outlet during preheating? If there is a large difference from temperature 5, and the temperature rises to 50°C during preheating, it will give you the discomfort of being too hot and be squeezed.

Similarly, in the middle of the cooling season, if the blowout temperature during precooling is, for example, 5℃, the normal blowout temperature is, for example, 20℃.
If the setting is ℃, pre-cool fbil@nakanoi'+ir.

There is a huge difference in temperature between the two, giving the impression that it is too cold.

Conventionally, in order to eliminate such malfunctions, there was a method of moving the normal air conditioning operation start time forward.

That is, the normal continuous air conditioning start time is moved forward by a certain amount of time, and the preheating/retreating preheating operation is performed from that start time. Also, during the preheating operation time, the maximum value is set to 1 degree,
The indoor air conditioning system f-j should be shredded and turned over.C By taking the method 4 above, you can eliminate the indoor air pollution before the start time and the indoor air conditioner becoming too high. This is normal empty! This is merely a change in the operating time, and does not meet the original goal of preheating and precooling control, which is to achieve the optimum temperature within a short time with the minimum amount of energy by performing cut-off operation.

[Object of the Invention] The object of the present invention is to improve the conventional preheating and precooling side as described above, 9.1.
An object of the present invention is to provide a first improved device.

[Summary of the Invention] The present invention provides 4.I! for a certain period of time before the start of normal air conditioning operation.
In preheating and precooling control, in which the air conditioning system inside a building is shut down and the air temperature is increased by 1 degree by a certain value, the air temperature of the air conditioner is changed from the middle of the preheating and precooling operation to normal air conditioning. A comparison is made between the outside air enthalpy and the internal enthalpy during preheating and precooling control with a machine NIL that is operated at a temperature close to the blowout temperature during operation (-1 during preheating and precooling) and allowed to evaporate for a certain period of time (11 during preheating and precooling). Preheating and precooling frost 111 wholesale f? which is characterized by incorporating a function that releases the shut-off operation of the air conditioning system in the building and takes in outside air when the absolute value of the difference is less than a certain value of 1 uli. It is t.

Examples of the invention] Next, the present invention will be explained in detail.

When the ventilation fan 4 and the air conditioner 5 are operated with the exhaust damper 1 and the outside air intake damper 2 closed and the ventilation damper 3 opened in the block 1 showing the indoor air conditioning system in Fig. 1, the indoor air conditioning system is
Since the ventilation 6 passes through the ventilation damper 3, becomes the supply air 7, takes in outside air 8, and does not take in 7'L, the %9 adjustment load is reduced, and the room temperature is reached faster than when the normal temperature is turned once. . FIG. 2 shows a step 11 in which the preheating operation time is determined according to the temperature conditions in the room and the indoor temperature, and a step IZ in which the seasonal conditions of summer or winter are determined and added to step 11.
When step 12 determines that it is winter, step Ij3 sets the start time of the air conditioning operation to previous life j and operates it, and when step 12 determines that it is not winter, predetermines the blowout of 7 g degree from the middle of the preheating time. step I4, which involves lowering the temperature difference 'PC' and extending the preheating operation time obtained in step 1 by a certain period of time; step 15, which compares the outside air enthalpy and the indoor enthalpy; a step lb for determining the possibility of intake of outside air; a step 17 for canceling the shut-off operation of the indoor air conditioning system when it is determined in step 16 that the outside air intake 'Jt is acceptable; and step 16; Step 18 in which step 16 is repeated when it is determined that outside air intake t'L is impossible, and step 19 in which the air conditioning operation start time is brought forward after being repeated in step 18. - Shows the preheating and precooling control device provided.

In step 11, the outside temperature and indoor temperature were set to 1 solar radiation.

The preheating operation time is calculated based on the previous day's actual time, etc.

In step 12, it is determined based on the calendar, outside temperature, etc. whether the current heating season is near mid-winter or mid-winter.

In steps 1 and 3, the air conditioning operation start time is brought forward during the heating season, which is close to mid-winter.

In step 14, in the heating period near the intermediate period, in order to eliminate the heat sensation during the preheating time, the degree of blowout is lowered by a certain value from the middle of the preheating time, and the preheating operation obtained in step 11 is reduced for a certain period of time. Extended operation 0 In step 15, the outside air enthalpy and the indoor enthalpy are compared.

In step 16, it is determined whether or not outside air can be taken in during the preheating time.

If outside air can be taken in, in step 17, the shut-off operation of the indoor air conditioning system is canceled.

If it is not possible to take in outside air in step 18, repeat step 16 in the trench at a certain time before the air conditioning operation starts.

After a certain period of time has elapsed, in step 19, the empty*, 1 bright rotation start time is moved forward. Pre-cooling i&li #mo1a1
It is a husk.

Step 14 will be explained below based on FIG.

The vertical axis represents temperature and the horizontal axis represents time.

After preheating starts, the HB is operated at the maximum temperature T for a certain period of time, and when the normal air conditioning operation start time ha approaches, the air temperature is adjusted to the air discharge temperature TA close to the air temperature TN during the normal air conditioning operation time. However, in this case, the room temperature should not reach the specified temperature lf before starting the air conditioning operation.
Step 1 to satisfy the following formula.
Correct the preheating operation time obtained in step 1.

'l' X H= T X HB 10 T
A Let H be the preheating operation time determined in step II.

Steps 15 to 17 will be explained below based on FIG.

In step 51, the indoor enthalpy is calculated from the internal temperature and humidity. At step 52, the outside air enthalpy is calculated from the outside air temperature and outside air iW degree. In step 53, the difference between the shore enthalpy and the outside air enthalpy is determined. In step 16, if the difference in enthalpy obtained in step 53 is less than a certain value, that is, if it is determined that even if outside air is taken in, it will not cause a significant load on the current preheating operation, then in step 17, the entire indoor The cut-off operation of silk reeling is canceled and outside air is taken in.

Make the air in your home vT fresh.

[Missing effects] As described above, according to the present invention, it is possible to prevent air contamination due to excessive heating and cooling during preheating and precooling control in the intermediate period, etc., and due to cut-off operation during preheating and precooling control, and 19 effects can be achieved. be.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a preheating precooling ≦; Figure 44 is a supplementary flowchart V1 of Figure 2. 1...Exhaust damper 2...Outside air intake damper 3.
...Ventilation damper 4...Ventilation fan 5...Air conditioner agent Patent attorney Noriyuki Chika (and 1 other person) Figure 1 Figure 2

Claims (1)

[Claims] A first function that calculates the preheating operation time based on outside air and indoor temperature conditions, and a second function that determines and adds seasonal conditions of summer or winter to this first function, when it is determined that it is winter, a third function that brings forward the start time of air conditioning operation; and when the second function determines that it is not the winter season, lowers the blowout temperature by a predetermined temperature difference from the middle of the preheating time; A fourth function that extends the preheating operation time determined by function 1 by a certain amount of time, a fifth function that compares outside air enthalpy and indoor enthalpy, and the possibility of taking in outside air during the preheating operation time. a seventh function that cancels the shut-off operation of the indoor air conditioning system when it is determined that outside air can be taken in by the sixth function; an eighth function that repeatedly executes the sixth function when it is determined that it is impossible to incorporate the above; and a ninth function that causes the air conditioning operation start time to be brought forward after being repeated by the eighth function. A preheating and precooling control device comprising the following functions.