JPH02225929A - Air conditioning and ventilating device - Google Patents

Abstract

PURPOSE:To control the ventilation rate so that it may be the same either in the case of total heat exchanging ventilation or sensible heat exchanging ventilation by serially arranging the total heat exchanging element and the sensible heat exchanging element, and supplying the outdoor air to the indoor heat exchanger by means of an outdoor air suction fan always through the respective heat exchanging elements. CONSTITUTION:In the case of total heat exchanging ventilation, the outdoor air is sucked from the outdoor side inlet 5 into a duct 12 and, after being routed through the total heat exchanging element 3 and the sensible heat exchanging element 4, is delivered from the indoor side outlet 8 through a fan 10 and a heat exchanger 13. On the other hand, the room air is sucked from the indoor side inlet 7 into a duct 15 to pass the upper side of the second duct switching damper 2, and is directed vertically through the total heat exchanging element 3 by means of the first duct switching damper 1 to exchange the total heat with the horizontally flowing outdoor air. In the case of sensible heat exchanging ventilation, the outdoor air is likewise sucked from the outdoor side inlet 5 into the duct 12 and is delivered into the room through the indoor side outlet 8. Meanwhile, the room air is sucked from the indoor side inlet 7 to be vertically routed through the sensible heat exchanging element by means of the second damper 2, and exchances sensible therein with the horizontally flowing outdoor air.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an air conditioning ventilation system that recovers indoor thermal energy to be discharged outdoors, and more specifically relates to an arrangement of an outdoor air suction blower, a total heat exchange element, and a sensible heat exchange element. It is related to the setting.

Conventional technology In recent years, as a means of ventilating a room that is currently being cooled or heated, the method has been to exhaust dirty air from inside the room to the outside, bring in fresh air from outside, and exchange heat between the indoor air and outdoor air. Air conditioning and ventilation systems have come into use that transfer the thermal energy of the exhausted indoor air to outdoor air and recover it indoors.

This type of air conditioning ventilation system uses total heat exchange ventilation during cooling and heating, and sensible heat exchange ventilation when the outside air is humid, such as during the rainy season.
During the spring and autumn seasons, normal ventilation was used.

The configuration of a conventional air conditioning ventilation system is shown in FIGS. 6 and 7. As shown in the figure, the main body 101 includes an outdoor suction port 10.
3, an outside air suction fan 112 that sucks in outside air, and an indoor air discharge fan 111 that exhausts indoor air from the outdoor outlet 102 are provided. In addition, the outside air suction blower 1
A room 115 in which a total heat exchange element 109 and a sensible heat exchange element 110 are arranged vertically is provided on the side of the 12 discharge ports 114.

This room 115 has a total heat exchange element 109 and a sensible heat exchange element 1.
A first ventilation path switching damper 107 provided on the outlet 114 side of the outside air suction blower 112 exchanges sensible heat with the upper and lower total heat exchange elements 109. This is a configuration in which the light is supplied to each of the elements 110.

The upper and lower total heat exchange elements 109 and sensible heat detection elements 110 are further divided into upper and lower parts, and the airflow A passing through the total heat exchange elements 109
The structure is such that the air flows out into the upper ventilation passage 130 and the outflowed air is discharged into the ventilation passage 116. Further, the airflow B passing through the sensible heat exchange element 110 flows out into the lower ventilation passage 131,
The air is discharged into the ventilation passage 116 after passing through a communication passage 132 that connects the lower ventilation passage 131 and the upper ventilation passage 130. Further, a second ventilation path switching damper 108 is provided at a position facing the first ventilation path switching damper 107,
Indoor air sucked through the first indoor suction port 104 is introduced through the indoor air suction port 117 into a room 115 in which the total heat exchange element 109 and the sensible heat exchange element 110 are arranged. Second
The ventilation path switching damper 108 is designed to form an airflow C that sends indoor air to the total heat exchange element 109 and an airflow that sends indoor air to the sensible heat exchange element 110. Switch. and each heat exchange element 109.
The airflows C and D that passed through 11Q are the indoor air discharge blower 1.
11 is arranged, and the outdoor outlet 1
02 is discharged. Further, the indoor air passage 122 is connected to the room 118, and the third ventilation passage switching damper 106 is used to open and close the room. This passage 122 is configured to communicate with the first indoor suction port 104. Reference numeral 119 denotes an indoor heat exchanger, which allows indoor air sucked in through the second indoor suction port 120 to air-condition the room, and also exchanges heat with ventilation air flowing out from the ventilation passage 116. The indoor air circulation blower 121 sucks in air from the second indoor suction port j20, discharges the air after heat exchange through the indoor discharge port 105, and circulates the indoor air. The operation in the above configuration is explained in the 8th section.
This will be explained with reference to FIGS.

In the case of total heat exchange ventilation, as shown in FIG. 8, outdoor air is sucked in by the outdoor air suction blower 112 through the outdoor side suction port 103, passes over the first ventilation path switching damper 1oa, and is completely heated. The air passes through the exchange element 109 and the upper ventilation passage 130, flows into the ventilation passage 116, and is supplied into the room from the indoor side discharge port 106. In addition, the indoor air is sucked into the indoor air suction port 117 [from the first indoor air suction port 104], and
The air passes above the ventilation path switching damper 108, passes through the total heat exchange element 109, and is then discharged by the indoor air discharge blower 111.
It is discharged from the outdoor discharge port 102. In this case, the third ventilation path switching damper 106 is closed.

In the case of sensible heat exchange ventilation, as shown in FIG. The air passes through the heat exchange element 110 and the lower ventilation passage 131, passes through the communication passage 132, flows into the ventilation passage 116, and is supplied into the room from the indoor side discharge port 106. In addition, indoor air is sucked in through the first indoor suction port 104 and
The air passes through the lower side of the ventilation path switching damper 108, passes through the sensible heat exchange element 110, and is discharged to the outdoor outlet 102 by the indoor air discharge blower 111. In this case = the third ventilation path switching damper 108 is closed.

In the case of normal ventilation, as shown in FIG. 10, outdoor air is sucked in by the outdoor air suction blower 112 through the outdoor side suction port 103, and is passed through the lower side of the first ventilation path switching damper 107 to the sensible heat exchange element. 110 and the lower ventilation passage 131,
The air flows into the ventilation passage 116 and is supplied into the room through the indoor outlet 106. In addition, a portion of the indoor air is sucked in through the first indoor suction port 104, passes through the indoor air passage 122, the third ventilation path switching damper 106, and is then sent to the indoor air discharge blower 111 through the outdoor outlet 102. more excreted. The remaining indoor air is sucked in through the first indoor air inlet 104, passes through the indoor air inlet 117, passes above the second ventilation path switching damper 108, passes through the total heat exchange element 109, and is used for indoor air discharge. The outdoor outlet 10 is opened by the blower 111.
It is discharged from 2. In this case, the third ventilation path switching damper 106 is open.

Problems to be Solved by the Invention However, in the configuration of the conventional air conditioning ventilation system, the path for the outside air sucked in by the outside air suction blower 112 to reach the ventilation passage 118 is a total heat exchanger than in the case of sensible heat exchange ventilation. Since there are more connecting passages 132 than during ventilation, there will be a difference in the amount of ventilation air supplied indoors during total heat exchange ventilation and sensible heat exchange ventilation, and the balance between indoor pressure and outdoor pressure will be disrupted, causing doors and windows to close. It became difficult to open and close, and drafts were coming in. In addition, during normal ventilation, a part of the indoor air passes through the first indoor suction port 117, passes through the total heat exchange element 109, and is then exhausted by the indoor air discharge blower 111. The pressure loss of the element 109 caused a decrease in the exhaust air volume.

The present invention solves these problems, and there is no difference in ventilation air volume in either total heat exchange ventilation or sensible heat exchange ventilation, and even in normal ventilation, there is no decrease in exhaust air volume. The purpose is to provide air conditioning ventilation equipment.

Means for Solving the Problems In order to solve this problem, the present invention provides an outdoor air ventilation path for introducing outdoor air into an indoor heat exchanger, a total heat exchange element arranged in series in this outdoor air ventilation path, and a sensible heat exchange element; an outdoor air suction blower arranged in the outdoor air ventilation path between the indoor heat exchanger and the sensible heat exchange element; A blower for discharging indoor air that performs heat exchange between indoor air or discharges indoor air to the outdoors without passing through each of the heat exchange elements, and an outdoor air ventilation path in which each of the heat exchange elements is located are used to separate two rooms. The room is divided into sections, and the one room is divided into sections.
A side surface is connected to the indoor air intake port, and the other side is connected to the indoor air outlet side as an indoor air ventilation path, and the air in the indoor air ventilation path is introduced into the other room through each of the heat exchange elements. , a heat exchange air ventilation passage leading to the indoor air outlet side, and a first ventilation passage switching damper for controlling the introduction of indoor air to the total heat exchange element in the indoor air ventilation passage; This is an air conditioning ventilation system in which the R heat exchange element is provided with a second ventilation path switching damper that controls the introduction of indoor air.

Function: With this configuration, the outdoor air supplied indoors is always drawn in from the outdoor air suction port by the outdoor air suction blower, passes through the total heat exchange element and the sensible heat exchange element, and is discharged to the indoor heat exchanger. The passageway is the same in both heat exchange ventilation and sensible heat exchange ventilation, so the ventilation air volume is the same.

In addition, in the case of normal ventilation, the air exhausted from the room is sucked in from the indoor air intake by the indoor air discharge blower, and is exhausted from the outdoor air outlet without passing through each heat exchange element. This will not cause a decrease in air volume.

EXAMPLE Hereinafter, an example of the present invention will be explained with reference to FIGS. 1 to 5.

The configuration of the air conditioning ventilation system in this example is shown in FIGS. 1 and 2. As shown in the figure, an outdoor air ventilation passage 12 is provided in the main body 11, which introduces outdoor air from the outdoor side suction port 6 and leads it out to a heat exchanger 13 arranged near the indoor side discharge port 8. . In this outdoor air ventilation path 12, a total heat exchange element 3 and a sensible heat exchange element 4 are provided in series. Each of these heat exchange elements 3 and 4 is configured to exchange heat by causing outdoor air to flow in the horizontal direction and indoor air to flow in the vertical direction. Further, a centrifugal outdoor air suction M blower 10 is installed in the middle of the outdoor air ventilation path 12 located on the leeward side of the heat exchange element 3.4.
is arranged so that outdoor air is exposed to the heat exchanger 13. Furthermore, the interior of the main body 11 is divided into two chambers by the outdoor air ventilation passage 12 in which the heat exchange element 3.4 is located. In other words, an indoor air ventilation passage 16 is formed upwardly, with one side communicating with the first indoor suction lower and the other side communicating with an indoor air discharge passage 14 in which a centrifugal indoor air discharge blower 9 is arranged. A heat exchange air ventilation path 16 is formed below into which the air that has passed through the heat exchange element 3.4 flows, and this ventilation path 1e is also connected to the indoor air discharge ventilation path 14. In the indoor air ventilation passage 16.

First and second ventilation path switching dampers 1 for passing incoming indoor air in the longitudinal direction of each heat exchange element 3.4
, 2 are provided. Further, an outdoor outlet 6 is provided to guide air from the indoor air discharge ventilation path 14 to the outdoors.

In addition, 17 is a second indoor side suction port, and the indoor air circulation blower 18 sucks the indoor air from this suction port 17, passes it through the indoor heat exchanger 13, and then returns it to the indoor side discharge port 8. Discharge more.

The operation of the above configuration will be explained with reference to FIGS. 3 to 5.

As shown in FIG. 3, during total heat exchange ventilation, outdoor air is sucked into the outdoor air ventilation passage 12 from the outdoor side suction port 6 provided in the main body 11, and the total heat exchange element 3, sensible heat exchange element 4
After passing through the outdoor air suction blower 10. Air is supplied from the indoor side discharge port 8 via the indoor heat exchanger 13. on the other hand,
Indoor air flows through the indoor air ventilation path 1 from the first indoor suction lower.
5, passes above the second ventilation path switching damper 2 (closed state), passes through the total heat exchange element 3 in the vertical direction by the first ventilation path switching damper 1 (open state), and crosses the total heat exchange element 3. After the total heat exchange with the outdoor air flowing in the direction, the indoor air enters the heat exchange air ventilation path 1e, and is exhausted through the outdoor outlet 6 by the indoor air discharge blower 9.

During sensible heat exchange ventilation, as shown in FIG. 4, outdoor air is sucked into the outdoor air ventilation path 12 through the outdoor air suction port 6 provided in the main body 11, and passes through the total heat exchange element 3 and the sensible heat exchange element 4. After that, air is supplied into the room through the indoor outlet 8 by the outdoor air suction blower 1o. On the other hand, indoor air is sucked in from the indoor suction lower, passes vertically through the sensible heat exchange element by the second ventilation path switching damper 2 (open state), and when passing through, the outdoor air flowing horizontally and the sensible heat Make an exchange. After heat exchange, the indoor air passes through a heat exchange air ventilation passage 16,
The indoor air is exhausted from the outdoor outlet 6 via the indoor air discharge passage 14 . Note that the first ventilation path switching damper 1 may be in either an open or closed state. That is, the second ventilation path switching damper 2 causes all the indoor air flowing into the indoor air ventilation path 16 to flow to the sensible heat exchange element 4, and no indoor air flows to the leeward side.

During normal ventilation, the first and second
The ventilation path switching damper 1.2 is closed, and indoor air is sucked into the indoor air ventilation path 16 from the first indoor suction lower. This sucked indoor air passes above the second ventilation passage switching damper 2 and above the first ventilation passage switching damper 1, flows out into the indoor air discharge ventilation passage 14, and is then moved by the indoor air discharge blower 9. The air is exhausted from the outdoor outlet 6.

As described above, according to this embodiment, the total heat exchange element 3 and the sensible heat exchange element 4 are arranged in series, and the outdoor air is constantly passed through each heat exchange element, and the indoor heat is exchanged by the outdoor air suction blower 1o. By discharging into the container 13, the ventilation air volume is the same in both total heat exchange ventilation and sensible heat exchange ventilation. Furthermore, when normally ventilated room air is exhausted, it does not pass through either the total heat exchange element 3 or the sensible heat exchange element 4, so the exhaust air volume can be secured without being affected by pressure loss.

Effects of the Invention As is clear from the explanation of the embodiments above, according to the present invention, the ventilation air volume is the same in both total heat exchange ventilation and sensible heat exchange ventilation, so the indoor pressure and outdoor pressure are the same. Tonaυ, the doors and windows will not be difficult to open or close, and drafts will not come in. Also, when exhausting indoor air using normal ventilation, the air volume does not decrease, so the exhaust air volume can be secured without increasing the capacity of the blower. .

[Brief explanation of the drawing]

FIG. 1 is a plan sectional view showing an air conditioning ventilation system according to an embodiment of the present invention, FIG. 2 is a sectional view of the same side, and FIG. 3 is an explanatory diagram showing the flow of air during operation of the total heat exchange ventilation. Figure 4 is an explanatory diagram showing the flow of wind when operating the same sensible heat exchange ventilation, Figure 5 is an explanatory diagram showing the flow of wind when operating the same normal ventilation, and Figure 6 is an explanatory diagram showing the flow of the wind when operating the conventional air conditioning ventilation system. 7 is a sectional view of the same side, FIG. 8 is an explanatory diagram showing the flow of wind during the total heat exchange ventilation operation, and FIG. 9 is a cross-sectional view of the same side.
FIG. 10 is an explanatory diagram showing the flow of air during the same sensible heat exchange ventilation operation, and FIG. 10 is an explanatory diagram showing the flow of air during the same normal ventilation operation. 1... First ventilation path switching damper, 2...
... Second ventilation path switching damper, 3 ... Total heat exchange element, 4 ... Sensible heat exchange element, 5 ...
...Outdoor side suction port, 6...Outdoor side outlet port, 9.
...Blower for discharging indoor air, 10...Blower for sucking outdoor air, 11... Main body, 12...
...Outdoor air ventilation duct, 14...Indoor air discharge duct, 15...Indoor air ventilation duct, 16...
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Claims (1)

[Claims] an outdoor air ventilation path for introducing outdoor air into the indoor heat exchanger;
A total heat exchange element and a sensible heat exchange element arranged in series in the outdoor air ventilation passage, and an outdoor air suction blower arranged in the outdoor air ventilation passage between the indoor heat exchanger and the sensible heat exchange element. , passing indoor air through each of the heat exchange elements;
An indoor air discharge blower that performs heat exchange between outdoor air and indoor air or discharges indoor air to the outdoors without passing through each of the heat exchange elements, and an outdoor air ventilation path in which each of the heat exchange elements is located. The room is divided into two rooms, one side of which is connected to the indoor air inlet, the other side of which is an indoor air ventilation path that connects to the indoor air outlet, and the other room is where the indoor air is The air in the ventilation passage is introduced through each of the heat exchange elements and is led out to the indoor air outlet side, and the indoor air ventilation passage is provided with a heat exchange air passage that introduces air through each of the heat exchange elements and leads it out to the indoor air outlet side. An air conditioning ventilation system including a first ventilation path switching damper that controls the introduction of air, and a second ventilation path switching damper that controls the introduction of indoor air to the sensible heat exchange element.