JPH0625628B2 - Air conditioner for residential basement - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an air conditioner for a residential basement that controls the air environment of the residential basement to be suitable for living.

[Conventional technology]

In recent years, from the viewpoint of effective use of living space, attempts have been made to use the basement as a living space, which has been receiving attention.

By the way, normally, the relative humidity in the basement is higher than that in the exterior, and fresh outdoor air must be introduced into the basement for use as a living room. Condensation is likely to occur, especially when hot and humid outside air is introduced into the basement room at a temperature lower than the outside temperature, such as during the rainy season.

Therefore, it is necessary to complete the air conditioning by controlling the temperature and humidity to prevent dew condensation on the floor and walls in the basement room, and introducing fresh outside air into the basement room. Therefore, it is essential to install an air conditioner to control the air condition in the basement and a ventilation fan to introduce outside air.

At this time, some kind of control means controls the operation of the air conditioner based on the temperature in the underground room, the temperature outside the room, and the like, and also periodically drives the ventilation fan to introduce fresh outside air.

[Problems to be solved by the invention]

However, when the room temperature is kept at a predetermined temperature by the operation of the air conditioner, if the outside air of a temperature lower or higher than the room temperature is introduced by the ventilation fan, the temperature of the heated or cooled basement will fall or rise to near the outdoor temperature. Then, after ventilation, the air conditioner must be heated or cooled to a predetermined temperature again, and the air conditioner with large power consumption is always in operation, which is very inefficient and economically disadvantageous.

Therefore, in the present invention, a ventilation fan for introducing normal outside air and a heat exchange type ventilation fan are selectively driven and ventilated on the basis of the temperature difference between the outdoor temperature and the indoor temperature. The technical issue is to suppress the change and to efficiently control the air condition in the basement.

[Means for solving problems]

The present invention has been made with the above points in mind,
An indoor temperature sensor that is provided in the residential basement to measure the indoor temperature, an outdoor temperature sensor that is provided outside the basement to measure the outdoor temperature, and a first ventilation fan and heat provided in the basement for introducing outside air. Exchange type second ventilation fan,
When an air conditioner for controlling the environmental condition of the basement and the temperature measured by the both sensors are input to control the operation of the air conditioner and the difference between the indoor temperature and the outdoor temperature during ventilation is smaller than a predetermined value. And a control unit for selectively driving the first ventilation fan and the second ventilation fan when they are large, respectively.

[Action]

Therefore, according to the present invention, the temperature difference between the outdoor temperature and the indoor temperature measured by the outdoor temperature sensor and the indoor temperature sensor during ventilation is derived by the control unit, and when the temperature difference is smaller than a predetermined value. When the temperature is large, the first ventilation fan for introducing the outside air and the second ventilation fan for the heat exchange type are selectively driven by the control unit, the temperature change in the underground room due to the introduction of the outside air is suppressed, and the inside of the underground room can be efficiently operated. The air condition is controlled, and the power consumption can be reduced.

〔Example〕

Next, the present invention will be described in detail with reference to the drawings showing one embodiment thereof.

First, in Fig. 1 showing the outline of the device, (1) is the underground
The basement is located in (2), and the upper part of basement (1) is underground.
Derived to the ground from (2). (3) is the above-ground building, (4a), (4
b) is the first ventilation fan and the second heat exchange type ventilation fan installed on the side wall of the basement (1) exposed above the ground to introduce fresh outside air into the basement (1). At the same time as taking it in, emit carbon dioxide and cigarette smoke. (Five)
Is a heat pump type air conditioner that is installed on the upper wall of the basement (1) and controls the environmental condition of the room, and has the cooling, heating, and dehumidifying operation functions.

(6) and (7) are an indoor temperature sensor and an indoor humidity sensor that measure the indoor temperature and indoor relative humidity of the basement (1), respectively, and (8) and (9) are installed outside the basement (1) to determine the outdoor temperature and An outdoor temperature sensor and an outdoor humidity sensor that respectively measure outdoor relative humidity.

Further, FIG. 2 is a block diagram showing the configuration of the device, the same symbols as in FIG. 1 show the same things, and (10) is a control unit composed of a microcomputer, etc. The measured values of (6), (7) and both outdoor sensors (8), (9) are constantly input, and both ventilation fans (4a), (4b) and air conditioners ( 5) Each operation control is performed to control the inside of the basement (1) to a comfortable air environment, and it operates according to the program shown in the flowchart of FIG. The control unit (10) has a function of converting the relative humidity into an absolute humidity based on the input values of the temperature and the relative humidity, a function of converting the dew point temperature from the absolute humidity, and an outdoor temperature and an indoor temperature. A function for calculating the temperature difference is provided.

Next, the operation of the above embodiment will be described with reference to the flow chart of FIG.

Now, as shown in FIG. 3, in step S1, the control unit (10) controls the heating operation of the air conditioner (5) based on the measured value of the indoor temperature sensor (6) and the preset indoor temperature set value. If it is determined whether or not, if the result of the determination is negative, that is, NO, the process proceeds to step S2, and in step S2, the control unit (10) determines whether or not the air conditioner (5) should be cooled. If the result of the determination is NO and the result of the determination is NO, the process returns to step S1 again.

On the other hand, if the result of the determination in step S1 is YES, the air conditioner (5) is heated by the control unit (10) for a constant t1 time in step S3, and in step S4 the t1
After the operation of the air conditioner (5) is stopped by the control unit (10) after a lapse of time, the control unit (10) is operated based on the measured values of the indoor and outdoor temperature sensors (6) and (8) in step S5 before ventilation. ), The temperature difference Ts between the outdoor temperature To and the indoor temperature Ti (=
It is determined whether or not | To−Ti |) is larger than a preset threshold value T, and if the result of the determination is YES, then in step S6, the control unit (10) causes the second The ventilation fan (4b) is driven for a constant t2 time, ventilation is performed while the temperature change in the basement (1) is suppressed, and if the result of the determination in the step S5 is NO, in step S7, the control unit (1
0), the first ventilation fan (4a) is driven for the fixed time t2 to perform ventilation, and then in step S8, the time t2
After the lapse of time, the control unit (10) stops the second ventilation fan (4b) or the first ventilation fan (4a), and then returns to step S1 again.

If the indoor temperature Ti is lower than the preset indoor temperature set value, the heating operation operation of the air conditioner (5) is repeated by the processing of steps S1 and S3 as described above, and the ventilation operation after step S4 is performed. Is repeated, and these routines are repeated until the indoor temperature Ti becomes equal to the set value, and when the indoor temperature Ti becomes equal to the set value, both steps S1 and S2 pass NO and stand by.

Next, if the result of the determination in step S2 is YES,
In step S9, the air conditioner (5) is cooled by the control unit (10) for the constant t1 hour, and in step S10, the air conditioner (5) is operated by the control unit (10) after the lapse of the t1 time.
After the operation is stopped, whether or not the temperature difference Ts between the outdoor temperature To and the indoor temperature Ti is larger than the preset threshold value T by the control unit (10) in step S11 prior to ventilation. If the judgment is made and the result of the judgment is YES,
In step S12, the control unit (10) controls the second ventilation fan.
(4b) is driven for the fixed time t2, ventilation is performed while the temperature change in the basement (1) is suppressed, and the step S11 is performed.
If the result of the determination is NO, in step S13, the control unit (10) drives the first ventilation fan (4a) for the constant t2 time to perform ventilation, and then in step S14, the t2 time elapses. After that, the control unit (10) controls the second ventilation fan.
(4b) or the first ventilation fan (4a) is stopped, and then the process returns to step S1.

If the indoor temperature Ti is higher than the preset indoor temperature set value, the cooling operation of the air conditioner (5) is repeated by the processing of steps S2 and S9 as described above, and the ventilation operation after step S10 is performed. These routines are repeated until the indoor temperature Ti becomes equal to the set value, and when the indoor temperature Ti becomes equal to the set value,
NO is passed through both steps S1 and S2 to enter the standby state.

Based on the measured values of the indoor temperature sensor (6) and the indoor humidity sensor (7), the absolute humidity and its dew point temperature in the basement (1) are derived by the control unit (10), and the basement (1) is When the air conditioner causes condensation on the surface or wall, the air conditioner (5) is forcibly switched to the dehumidifying operation by the control unit (10), and when the indoor absolute humidity reaches the indoor humidity set value, or the outdoor When the absolute humidity becomes almost equal to, the air conditioner (5) can be switched back to the original cooling or heating operation again.

If the indoor and outdoor temperatures To and Ti are both 10 ° C. and the indoor temperature setting value is 20 ° C., the air conditioner is processed by steps S1 and S3 in the flowchart of FIG.
(5) is heated for t1 hour, after which the air conditioner (5) is stopped and the ventilation movement of the ventilation fan is performed.

At this time, assuming that the indoor temperature Ti has risen only up to 13 ° C., if the threshold value T in the determination of step S5 is, for example, 5 [° C.], the temperature difference Ts between the outdoor and the indoor is “3”.
At (= 13 ° C-10 ° C), which is smaller than the threshold value T = 5 [° C], the first ventilation fan (4a) is driven for t2 hours for ventilation, while the indoor temperature Ti is If the temperature rises to 18 ° C, the temperature difference Ts between the outside and the inside of the room is “8” (=
18 ° C-10 ° C), which is larger than the threshold value T = 5 [° C], the heat exchange type second ventilation fan (4b) is t2 in order to suppress the temperature change in the basement (1). It will be driven for a period of time to perform ventilation.

Therefore, heating by the air conditioner (5) allows the basement (1)
When ventilation is performed in a state where the temperature inside has risen close to the set value, the heat exchange type second ventilation fan (4b) is selectively driven, so by driving the first ventilation fan (4a), The indoor temperature that has risen close to the set value drops to near the outdoor temperature, and it is not necessary to repeat heating from the beginning, and power consumption can be reduced by shortening the operating time of the air conditioner (5).

By the way, even in the case of the cooling operation, the power consumption can be reduced by shortening the operation time of the air conditioner (5) as in the heating operation described above.

In the above-described embodiment, the heating and cooling operations of the air conditioner (5) are performed for t1 hours and then the ventilation operation of the ventilation fan is performed. However, during continuous heating and cooling operations of the air conditioner (5), the ventilation fan It goes without saying that the ventilation operation may be performed.

It goes without saying that the operating time t1 of the air conditioner (5), the driving time t2 of the ventilation fans (4a) and (4b), and the threshold value T of the temperature difference can be changed as appropriate.

〔The invention's effect〕

As described above, according to the air conditioner for a residential basement of the present invention, the outside air is introduced when the difference between the outdoor temperature and the indoor temperature is smaller than or larger than a predetermined value.
Since the control unit selectively drives the ventilation fan and the second heat exchange type ventilation fan, it is possible to suppress the temperature change in the basement due to the introduction of outside air during ventilation, and reduce the operating time of the air conditioner. Can be reduced and the air condition in the basement can be efficiently controlled, which is very economical and its effect is extremely large.

[Brief description of drawings]

The drawings show an embodiment of an air conditioner for a residential basement according to the present invention. FIG. 1 is a schematic sectional view, FIG. 2 is a block diagram, and FIG. 3 is a flow chart for explaining the operation. (1) …… basement, (4a), (4b) …… first and second ventilation fans,
(5) …… Air conditioner, (6) …… Indoor temperature sensor, (8) …… Outdoor temperature sensor, (10) …… Control unit.

Claims (1)

[Claims] 1. An indoor temperature sensor installed in a residential basement room to measure an indoor temperature, an outdoor temperature sensor installed outside the basement room to measure an outdoor temperature, and an outdoor air installed in the basement room. And a heat exchange type second ventilation fan, an air conditioner for controlling the environmental condition in the basement, and the temperature measured by the both sensors are input to control the operation of the air conditioner and to ventilate the room during ventilation. When the difference between the temperature and the outdoor temperature is smaller than or larger than a predetermined value, the first ventilation fan and the second ventilation fan respectively.
An air conditioner for a residential basement, comprising: a control unit that selectively drives the ventilation fan.