JPH06265188A - Total heat exchanger - Google Patents

Abstract

PURPOSE:To use the outside air to perform a comfortable ventilation at an adequate temperature by controlling the opening degree of a bypass damper corresponding to the difference between the outside and room temperatures based on signals from temperature sensors. CONSTITUTION:Temperature sensors 12 and 13 are installed outside and inside a room, and the opening degree of a bypass damper 11 is controlled according to the difference between the outside and room temperatures based on signals from the sensors 12 and 13. That is, when the difference between the outside and room temperatures is not higher than a specified value (6-7 deg.C, for example), ventilation takes place with the bypass damper 11 opened full to lead the exhaust air C into a normal exhaust path 7, so that the room is cooled or heated by the outside air A. When the temperature difference is the specified value or higher, ventilation is carried out with the exhaust air C mainly led into a total heat exchange exhaust path 6, so that cooling or heating is performed at a specified temperature to avoid the uncomfortable feeling. Thus, a comfortable ventilation at an adequate temperature can be carried out by using the outside air A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a total heat exchanger which opens and closes a bypass damper to switch between an exhaust passage for total heat exchange ventilation and an exhaust passage for normal ventilation.

[0002]

2. Description of the Related Art A conventional total heat exchanger is shown in FIG.
An air supply fan 3 and an exhaust fan 4 are provided on both sides of the total heat exchange element 2 provided in the main body 1A, respectively.
To the exhaust D from the exhaust fan 4, the exhaust passage 6 for total heat exchange ventilation passing through the total heat exchange element 2 by the fully closed position a of the bypass damper 5A, and the total heat exchange element 2 at the fully open position b. An ordinary ventilation exhaust passage 7 is provided. Further, there is provided an air supply passage 8 through which the outside air A from the outside passes through the total heat exchange element 2 and reaches the air supply B from the air supply fan 3.

In this total heat exchanger, conventionally, during cooling and heating, the bypass damper 5A is switched from the fully open position b to the fully closed position a, and the total heat exchange passage 6 performs heat exchange between the supply air A and the return air C. We perform total heat exchange ventilation to recover the heat of the return air.

In addition, there is a temperature difference between the indoor air and the outdoor air when the air is not cooled in the winter or when the heating is not performed in the summer, and it may be possible to cool or heat the outdoor air.

[0005]

However, when the outside air is used for cooling and heating, if the temperature difference between the inside and outside is large, the season close to winter is cold, and the season close to summer is too hot, which is uncomfortable in terms of feeling. There is a problem to feel.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a total heat exchanger that uses the outside air to perform proper ventilation at a suitable temperature.

[0007]

According to the present invention, in a total heat exchanger that opens and closes a bypass damper to switch between the exhaust passage for total heat exchange ventilation and the exhaust passage for normal ventilation, each of the outdoor portion and the indoor portion A temperature sensor is provided, and control means is provided for controlling the opening degree of the bypass damper according to the difference between the outside air temperature and the room temperature based on the signals from both temperature sensors.

It is preferable that the control means is composed of a control panel attached to the main body, and is connected to the control motors of both temperature sensors and the bypass damper and the control panel of the cooling and heating machine.

[0009]

In the total heat exchanger configured as described above, when the difference between the outside air temperature and the room temperature is smaller than a predetermined value (for example, 6 to 7 ° C), the opening degree of the bypass damper is fully opened and the return air is returned. To the exhaust passage for normal ventilation to perform ventilation, and to cool or heat the room by outside air.

If the temperature difference is larger than a predetermined value,
The return air is mainly guided to the exhaust passage for total heat exchange ventilation to perform ventilation, and cooling and heating is performed at a predetermined temperature to eliminate discomfort.

[0011]

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

In FIG. 1, parts corresponding to those in FIG. 2 are designated by the same reference numerals, and duplicated description will be omitted.

In FIG. 1, a bypass damper 5 is rotatably provided at a corner of the total heat exchange element 2 on the side of the return air C via a control motor 11, and the control motor 11 is connected to a main body 1 by an electric wire L1. It is connected to a control means, that is, a control panel 10 attached to the side surface of the. An indoor temperature sensor 12 that detects an indoor temperature is provided at the return air port 1a of the main body 1, and an outdoor air temperature sensor 13 that detects an outdoor temperature is provided at the air supply port 1b. 1
2 and 13 are control boards 10 by electric wires L2 and L3, respectively.
It is connected to the. An air conditioner control panel (not shown) is connected to the control panel 10.

Next, the control mode will be described with reference to FIG.

During operation, the control panel 10 determines whether or not the room temperature is higher than a predetermined temperature T1 (for example, 26 ° C.) based on a signal from the indoor temperature sensor 12 as shown in FIG. 2 (step S1). If YES, a control signal is output to the air conditioner control panel to cool the air conditioner (step S
2). Therefore, based on the signals from both temperature sensors 12 and 13, it is determined whether the outside air temperature is lower than the room temperature (step S3). When NO, that is, when the outside air temperature is higher than the room temperature, a control signal is output to the control motor 11, the bypass damper 5 is closed, the return air C is guided to the exhaust passage 6 for total heat exchange ventilation, and total heat exchange ventilation operation is performed. (Step S
4) The procedure returns, and if YES, the procedure moves to step S9.

When step S1 is NO, that is, when the room temperature is lower than 26 ° C., the room temperature is the predetermined temperature T2 (for example, 14 ° C.).
C.) is determined (step S5). YE
If S, that is, if the room temperature is lower than 14 ° C., a control signal is output to the air conditioner control panel to heat the air conditioner (step S6). Therefore, it is determined whether the outside air temperature is lower than the room temperature (step S7). If YES, that is, if the outside air temperature is lower than 14 ° C, the control motor 1
1, the control signal is output to 1, the bypass damper 5 is closed, the return air C is guided to the exhaust passage 6 for total heat exchange ventilation, total heat exchange ventilation is performed (step S8), and if return and NO,
Go to step S9.

In step S9, that is, when the room temperature is 24 ° C. or lower and 14 ° C. or higher, that is, when the outside air temperature is lower than the room temperature during the cooling operation or higher than the room temperature during the heating operation between the predetermined temperatures T1 and T2, the air conditioner is operated. Perform the same interim ventilation operation as when not operating. That is, the control board 10 determines whether or not the temperature difference between the room temperature and the outside air temperature is smaller than a predetermined value T3 (for example, 6 to 7 ° C.) based on the signals from both temperature sensors 12 and 13 (step S10). If YES (if small), a control signal is output to the control motor 11, the opening degree of the bypass damper 5 is fully opened, and the return air is flowed to the exhaust passage 7 for normal ventilation to perform normal ventilation (step S
11) and return.

When step S10 is NO, that is, when the temperature difference is larger than the predetermined value, the opening degree of the bypass damper 11 is reduced and the flow rate of the return air to the exhaust passage 6 for total heat exchange ventilation is increased to mainly increase the total heat. Exchange ventilation (step S1
2) It is determined whether or not the opening is such that the difference between the supply air temperature and the indoor temperature is T3 (step S13). If NO, the process returns to step S12, and if YES, the process returns.

In step S13 of the present example, the control motor is controlled by opening the opening at which the temperature difference (difference between the supply air temperature and the room temperature) becomes T3 from the difference between the outside air temperature and the room temperature based on the preprogrammed calculation. However, the supply air temperature sensor 14 may be separately provided so that the temperature difference between the outside air temperature sensor 13 and the supply air temperature sensor 14 becomes T3.

[0020]

Since the present invention is constructed as described above, the outside air is utilized to provide a suitable temperature and comfortable ventilation.
Energy saving can be achieved.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention.

FIG. 2 is a control flowchart.

FIG. 3 is a side sectional view showing a conventional example.

[Explanation of symbols]

 A ... Outside air a ... Bypass damper fully closed position B ... Air supply b ... Bypass damper fully opened position C ... Return air D ... Exhaust air L1, L2, L3 ... Electric wire 1, 1A ... Main body 1a ... Recirculation air inlet 1b ... Air inlet 2 ... Total heat exchange element 3 ... Air supply fan 4 ... Exhaust fan 5, 5A ... Bypass damper 6.・ ・ Exhaust passage for total heat exchange ventilation 7 ・ ・ ・ Exhaust passage for normal ventilation 8 ・ ・ ・ Air supply passage 10 ・ ・ ・ Control panel 11 ・ ・ ・ Control motor 12 ・ ・ ・ Indoor temperature sensor 13 ・ ・ ・ Outside air temperature Sensor 14 ... Supply air temperature sensor

Claims (1)

[Claims] 1. A total heat exchanger that opens and closes a bypass damper to switch between a total heat exchange ventilation passage and a normal ventilation passage,
The total heat is characterized by providing temperature sensors both outdoors and indoors, and providing control means for controlling the opening degree of the bypass damper according to the difference between the outside air temperature and the room temperature based on the signals from both temperature sensors. Exchanger.