JP2002071184A - Ventilating air conditioning method and system thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilating air conditioning system that ensures energy saving and confortableness. SOLUTION: A ventilating apparatus 2 capable of performing heat exchange ventilation and ordinary ventilation not followed by heat exchange, and an air conditioning apparatus 3 capable of bringing air conditioning atmosphere with the aid of circulation of indoor air, are disposed such that fresh air taken into a room disposing the ventilating apparatus 2 therein is directed toward a suction side of indoor air of the air conditioning apparatus 3. There is constructed ventilating air conditioning means where a ventilating function and an air conditioning function have relevance. Outdoor air enthalpy is estimated from outdoor temperature and outdoor humidity and indoor air enthalpy is estimated from indoor temperature and indoor humidity. Upon cooling operation of the air conditioning apparatus 3 the ventilating apparatus 2 is operated in ordinary ventilation when the outdoor air enthalpy is lower than the indoor air enthalpy, and fresh air taken into the room is dehumidified and cooled in the air conditioning apparatus 3 and is sent into the room.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilator having a ventilation function capable of performing heat exchange ventilation by supply and exhaust through a heat exchanger and ordinary ventilation without heat exchange, and heat-processes indoor air. The present invention relates to a ventilation air conditioning method and a ventilation air conditioning system using an air conditioner that performs an air conditioning function.

[0002]

2. Description of the Related Art In a ventilator having a heat exchange ventilation function, a plurality of primary passages for passing an exhaust flow as a primary airflow and a plurality of secondary passages for supplying a supply airflow as a secondary airflow are internally independent. Many of the hexahedrons that intersect as-is and incorporate a laminated heat exchanger. Basically, in the center of the main body casing formed in a hexahedral box shape, the heat exchanger turns the four corners formed by the surfaces where the primary passage and the secondary passage are opened up and down and left and right. The structure which incorporated in the sideways state is taken. In the main body casing, an exhaust ventilation path with the primary path of the heat exchanger as a part of the path and an air supply path with the secondary path of the heat exchanger as a part of the path are formed independently over the entire path. Has been established.

An exhaust fan and an air supply fan are incorporated on the left and right sides of the heat exchanger. The exhaust fan forms an exhaust air flow from the room air in the exhaust air passage, and the air supply fan forms an air flow from the outside air in the air supply air passage. You. A bypass ventilation path bypassing the heat exchanger is provided on the side of the heat exchanger. By opening the switching damper, the exhaust air flows through the bypass ventilation path to enable ordinary ventilation without heat exchange. ing.

[0004] An air conditioner which performs an air conditioning function for thermally processing indoor air is provided with a heat exchanger for circulating a heat medium and a circulating blower for circulating room air through the heat exchanger. A technique has been proposed in which such a ventilation device or a ventilation device using ordinary air supply and an air conditioning device are installed in one room and linked to each other to provide a highly comfortable atmosphere in the room as a ventilation air conditioning system. For example, JP 2000-
Japanese Patent Application Laid-Open No. 121132 discloses an air conditioner provided with room temperature detecting means for detecting room temperature and external air temperature detecting means for detecting an outside air temperature, and having outside air intake means for controlling the intake of outside air according to the temperature relationship between the inside and outside of the room. ing. This air conditioner suppresses the intake of outside air when the outside air temperature is higher than the indoor temperature during the cooling operation, and suppresses the intake of outside air when the outside air temperature is lower than the indoor temperature during the heating operation, thereby reducing the heat load. It is possible to take in outside air with a suppressed increase. As for switching between heat exchange ventilation and normal ventilation of a ventilation device having a heat exchange function, Japanese Patent Application Laid-Open No. 9-178241 discloses an operation control technique for automatically performing the operation by using information of an air conditioner.

As shown in FIG. 6, a heat exchange ventilator 50 and an air conditioner 51 are connected by a monitor line 52, and a cooling and heating operation signal and an indoor temperature setting signal of the air conditioner 51 are used as control information. The controller 53 automatically switches between heat exchange ventilation and normal ventilation. The indoor air temperature detector 54 for detecting the temperature of the indoor air sucked from the indoor air inlet is also provided in the heat exchange ventilator 50 itself.
And an outside air temperature detector 55 for detecting the temperature of the outside air sucked from the outdoor outside suction port. The information obtained from the air conditioner 51 and the room air temperature detector 54 and the outside air temperature detector 5 are provided.
From the temperature information obtained from 5, the switching between heat exchange ventilation and ordinary ventilation is performed to obtain energy saving and comfort.

[0006]

In the technical field of ventilation and air conditioning related to ventilation and air conditioning, most of the above-mentioned conventional technologies use temperatures such as the indoor temperature and the outside air temperature as judgment materials for the control operation. Heat is a form of energy,
Even if the heat is measured only at the temperature which is a factor indicating the strength, and the control is performed based on the measured temperature, the comfort and the energy saving may not be exhibited. For example, even if the outdoor temperature is lower than the indoor temperature, if the humidity is higher outside the room than inside the room, the cooling load increases due to the introduction of the outside air.

In a ventilating air-conditioning system in which a ventilation device having a heat-exchange ventilation function and an air-conditioning device are connected, it is possible to efficiently cool the room (external air cooling) by taking in outside air without exchanging heat. In a method of measuring heat only by temperature, for example, even in the case of morning and evening in summer, it is difficult to perform effective ventilation operation, and depending on the situation, energy saving and comfort may not be obtained.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to develop a ventilation and air-conditioning method capable of obtaining energy saving and comfort. The purpose is to develop a ventilation and air conditioning system that can provide comfort and comfort.

[0009]

Means for Solving the Problems To achieve the above object, the invention of claim 1 provides a ventilation system by exchanging heat between outside air taken into a room and room air exhausted from the room to the outside through a heat exchanger. A ventilation device that can perform heat exchange ventilation that performs heat exchange and ordinary ventilation that does not involve heat exchange, and an air conditioning device that can circulate air in the room to create an air-conditioned atmosphere in the room The ventilation air-conditioning means having the relevance between the ventilation function and the air-conditioning function is arranged by arranging the outside air to be directed toward the indoor air suction side of the air conditioner, and the ventilation air-conditioning means is calculated from the outdoor temperature and the outdoor humidity. Means for controlling the operation of heat exchange ventilation and ordinary ventilation based on the outdoor air enthalpy and the indoor air enthalpy calculated from the indoor temperature and the indoor humidity is adopted.

In order to achieve the above object, a second aspect of the present invention is to provide a heat exchange ventilator for exchanging heat between an outside air taken into a room and room air exhausted from the room to the outside through a heat exchanger, A ventilator that can perform normal ventilation without heat exchange and an air conditioner that circulates air in the same room to create an air-conditioned atmosphere in the room Ventilation air-conditioning means having ventilation function and air-conditioning function are arranged so as to face the suction side of room air, and this ventilation air-conditioning means is controlled by the outdoor temperature and outdoor humidity from the outdoor air enthalpy, The indoor air enthalpy is calculated from the indoor temperature and the indoor humidity.If the outdoor air enthalpy is lower than the indoor air enthalpy during the cooling operation of the air conditioner, the ventilator is operated with normal ventilation. , Employing a means for controlling so as to blow into the room to outside air incorporated into the room and dehumidification cooling in the air conditioner.

In order to achieve the above object, the invention according to claim 3 provides a heat exchange ventilator for exchanging heat by exchanging heat between outside air taken into a room and room air exhausted from the room to the outside through a heat exchanger; A ventilator that can perform normal ventilation without heat exchange and an air conditioner that circulates air in the same room to create an air-conditioned atmosphere in the room Ventilation air-conditioning means having ventilation function and air-conditioning function are arranged so as to face the suction side of room air, and this ventilation air-conditioning means is controlled by the outdoor temperature and outdoor humidity from the outdoor air enthalpy, The indoor air enthalpy is calculated from the indoor temperature and the indoor humidity.If the outdoor air enthalpy is lower than the indoor air enthalpy during the cooling operation of the air conditioner, the ventilator is operated with normal ventilation. , So as to blow into the room to outside air incorporated into the room and dehumidification cooling in the air conditioner, when the outdoor air enthalpy is higher than the indoor air enthalpy,
Means is employed in which the ventilation device is operated by heat exchange ventilation, and the outside air taken into the room is controlled to be dehumidified and cooled by the air conditioner and blown into the room.

According to a fourth aspect of the present invention, there is provided a control circuit according to the second or third aspect, wherein the outdoor air enthalpy is lower than the indoor air enthalpy and the indoor temperature> Set temperature>
At the time of the outdoor temperature, means for controlling the air conditioner to be in the air blowing operation is employed.

According to a fifth aspect of the present invention, in order to achieve the above object, the control circuit in the means according to any one of the second to fourth aspects allows the outside air temperature to be lower than the room temperature during the heating operation of the air conditioner. In this case, a means is employed in which the ventilation device is operated by heat exchange ventilation, and the temperature of the outside air taken into the room is raised by the air conditioner to be blown into the room.

[0014]

1 to 4 show a ventilation and air-conditioning system according to this embodiment, and FIG. 5 shows a control operation. As shown in FIG. 1 to FIG. 3, the system configuration of this ventilation air conditioning system includes a heat exchange ventilator 2 provided with a heat exchanger 1, and heat processing of indoor air to make the room an air-conditioned atmosphere (cooling or heating atmosphere). And an air conditioner 3 which performs an air conditioning function to be connected by a signal line 4. As shown in FIG. 3, the heat exchange ventilator 2 is configured by incorporating a heat exchanger 1, an exhaust fan 6, and an air supply fan 7 into a main body box 5. The heat exchanger 1 performs air-to-air heat exchange, and includes a plurality of linear primary passages for passing a primary airflow (exhaust flow) and a plurality of linear secondary passages for passing a secondary airflow (supply airflow). And cross each other in an independent state inside, the entrance and exit end of the primary passage is open on two opposing surfaces, the entrance and exit end of the secondary passage is open on the other two opposing surfaces, and both edges are closed to form a hexahedron Have been.

The main body box 5 is formed in a box shape having an open side surface in the room, and the heat exchanger 1 is removably incorporated at a substantially central portion of the inside thereof. In the main body box 5, an exhaust ventilation path having a primary path of the heat exchanger 1 as a part of the path and an air supply ventilation path having a secondary path of the heat exchanger 1 as a part of the path extend over the entire path. They are configured to be separated from each other. The air supply fan 7 is incorporated in a part of the air supply passage, and the exhaust fan 6 is incorporated in a part of the exhaust air passage. A detachable decorative panel 8 is attached to an open portion on the indoor side surface of the main body box 5.

The exhaust ventilation passage has an indoor suction port 9 opened on one side of the decorative panel 8 attached to the main body box 5 as an inlet end, and passes through a primary passage of the heat exchanger 1 from a suction port of the exhaust fan 6. A series of passages facing the air outlet and having an outdoor air outlet facing the outdoor as an outlet end. The air supply passage has an outdoor suction opening opened on one side of the main body box 5 as an inlet end, and passes from a suction opening of the air supply fan 7 to a blow outlet through a secondary passage of the heat exchanger 1,
This is a series of passages having an indoor outlet 10 opened on the opposite side of the indoor inlet 9 of the decorative panel 8 as an outlet end. The outdoor suction port and the outdoor air outlet are each connected to the outside (often outdoors).

The exhaust ventilation passage is provided with a bypass ventilation passage (not shown) that branches off upstream of the heat exchanger 1 and bypasses the heat exchanger 1 to communicate with the outside. A switching damper (not shown) that normally closes the bypass ventilation path is provided, and this switching damper is driven and opened by a geared motor or the like, so that exhaust gas bypassing the heat exchanger 1 is opened. A flow stream is formed and normal ventilation without heat exchange can be performed. If the bypass ventilation passage is closed, the supply air flow and the exhaust air flow pass through the heat exchanger 1, and heat exchange ventilation with continuous heat exchange is performed.

The switching damper, the air supply fan 7 and the exhaust fan 6 are controlled by a control circuit 11 including a CPU for controlling the operation of the heat exchange ventilator 2, so that heat exchange ventilation and ordinary ventilation through a bypass ventilation path are selectively performed. And energy saving and comfort are obtained. The control circuit 11 includes an outdoor temperature detecting means 1 for detecting the temperature of outdoor air before passing through the heat exchanger 1 sucked from the outdoor suction port.
2 and an outdoor humidity detecting means 13 for detecting the humidity of outdoor air before passing through the heat exchanger 1 sucked from the outdoor suction port, are connected via a signal line 4.

The air conditioner 3 is provided with an air conditioning function for subjecting the room air to heat processing to make the room an air-conditioned atmosphere. As shown in FIG. A circulation blower 15 that circulates through the air is provided. The circulation blower 15 and the heat medium circulation system are
Switching between cooling and heating and operation control with the set temperature as a target value are performed by a control circuit 16 that controls the operation of the apparatus. The control circuit 16 includes an indoor temperature detecting means 18 for detecting the temperature of the indoor air before passing through the heat exchanger 14 sucked through the suction port 17 and passing through the heat exchanger 14 sucked through the suction port 17. The indoor humidity detecting means 19 for detecting the humidity of the indoor air before the operation is connected via the signal line 4. The heat exchange ventilator 2 and the air conditioner 3 are arranged close to each other so that the outside air taken into the room of the heat exchange ventilator 2 is directed to the room air inlet 17 side of the air conditioner 3. Relevant ventilation and air conditioning means are configured. The control circuit 16 of the air conditioner 3 and the control circuit 11 of the heat exchange ventilator 2
The connection between them is also made by a signal line 4 so that signals can be exchanged.

The heat exchange ventilator 2 can independently perform a heat exchange ventilation operation and a normal ventilation operation, and the air conditioner 3 can also independently perform a cooling and heating operation. Control circuit 11 of heat exchange ventilator 2
Controls the operation of the ventilation air-conditioning unit by the operation shown in the flowchart of FIG. 5 during the cooling operation. In addition,
The flowchart of FIG. 5 is specifically described for the program at the time of cooling setting.

Step 2 in the flowchart of FIG.
1, the indoor temperature detecting means 18 and the indoor humidity detecting means 19
The indoor temperature T1 and the indoor humidity H1, which are the detected values of the indoor air, are fetched from the air conditioner 3 via the signal line 4 and the energy of the indoor air is obtained from the indoor temperature T1 and the indoor humidity H1 based on the humid air chart in step # 2. Is calculated. Then, in step # 3, the outdoor temperature T2 and the outdoor humidity H2, which are the detection values of the outdoor temperature detecting means 12 and the outdoor humidity detecting means 13, are taken. The outdoor air enthalpy h2 indicating the amount of energy of the outdoor air is calculated based on the calculated value, and the process proceeds to step # 5.
In step # 5, it is determined whether or not the indoor air enthalpy h1 is larger than the outdoor air enthalpy h2. If the indoor air enthalpy h1 is larger than the outdoor air enthalpy h2, the process proceeds to step # 6, and in step # 6, it is determined whether cooling is possible only by introducing outside air. This determination is for determining whether or not the condition of indoor temperature T1> set temperature> outdoor temperature T2 is satisfied.

In step # 5, the indoor air enthalpy h1
If is not larger than the outdoor air enthalpy h2, it is determined that the amount of energy of the outdoor air is larger than the amount of energy of the indoor air, and the cooling by the introduction of the outside air is not suitable, and it is determined in step # 7 whether the ventilation operation is necessary. The determination here is based on a standard different from the amount of energy of the indoor air and the outdoor air, such as the degree of contamination of the indoor air. If indoor temperature T1> set temperature> outdoor temperature T2 in step # 6, in step # 8, the air blower 15 for the air conditioner 3 is operated, the heat medium circulation is stopped, and the heat exchange ventilator 2 is operated. A process for performing a normal ventilation operation without heat exchange is performed, and the process proceeds to step # 12. As a result, outside air is blown into the room from the indoor outlet 10 of the heat exchange ventilator 2 into the room, is drawn in from the inlet 17 of the air conditioner 3, and is blown into the room from the outlet without any processing.
The outside air blown into the room is circulated in the room by the circulation blower 15, and the room is naturally cooled by introducing the outside air.

Then, in step # 12, it is determined whether or not the set temperature> the indoor temperature T1. If the set temperature> the indoor temperature T1, the process for stopping the ventilation / air-conditioning means is performed in a step # 13. Return to the processing of. When it is not possible to introduce and cool the outside air in step # 6, that is,
If it is not possible to bring the indoor temperature T1 close to the set temperature only by introducing the outside air, in step # 9, the air conditioner 3 is operated in the cooling mode, and the heat exchange ventilator 2 is operated in the normal ventilation mode without heat exchange. And the process proceeds to step # 12. As a result, outside air is blown into the room from the indoor outlet 10 of the heat exchange ventilator 2 into the room, is drawn in from the inlet 17 of the air conditioner 3, passes through the heat exchanger 14, is dehumidified and cooled, and is blown out. From the room. The dehumidified and cooled outside air blown into the room is circulated in the room by the circulation blower 15, and the room is brought into a cooling atmosphere by introducing the outside air and processing the air conditioner 3.

If it is determined in step # 7 that the ventilation operation is necessary, in step # 10, the air conditioner 3 is caused to perform the cooling operation, and the heat exchange ventilation device 2 is subjected to the heat exchange ventilation operation involving heat exchange. And proceed to step # 12. As a result, heat is exchanged with the exhaust flow into the room, and the outside air having recovered heat is blown into the room from the indoor outlet 10 of the heat exchange ventilator 2 and is sucked through the suction port 17 of the air conditioner 3, and the heat exchanger 14, the air is dehumidified, cooled, and blown out from the outlet into the room. The dehumidified and cooled outside air blown into the room is circulated in the room by the circulation blower 15, and the room is brought into a cooling atmosphere by introducing the outside air and processing the air conditioner 3. The heat of the room air sucked and exhausted by the heat exchange ventilator 2 is recovered in the heat exchanger 1 of the heat exchange ventilator 2 to reduce the cooling load. If it is determined in step # 7 that the ventilation operation is unnecessary, in step # 11, the air conditioner 3 is caused to perform the cooling operation and the heat exchange ventilation device 2 is stopped, and the process proceeds to step # 12.

In winter, when the ventilation operation is instructed by the user, the control circuit 1 of the heat exchange ventilator 2
1, when the outdoor temperature T2 is sufficiently lower than the indoor temperature T1, the heat exchanger ventilator 2 is operated to perform a heat exchange operation, and the temperature of the outside air taken into the room is increased by heat exchange.
And let it blow into the room. Accordingly, even when the outside air temperature is low and heat is exchanged between the exhaust streams and supplied to the room and a sense of cool air remains, the air is heated by the air conditioner 3 and then supplied to the room without generating a sense of cool air. The room can be ventilated without compromising comfort.

As described above, by controlling the ventilation and the air conditioning based on the indoor air enthalpy h1 and the outdoor air enthalpy h2, it is possible to exhibit comfort and energy saving. The normal ventilation operation of the heat exchange ventilator 2 is performed by stopping the exhaust fan 6 and operating only the air supply fan 7 in addition to the method of opening the bypass ventilation path that bypasses the heat exchanger 1. It is also possible.

[0027]

According to the first aspect of the present invention, it is possible to obtain a ventilation air-conditioning method capable of achieving energy saving and comfort.

According to the second aspect of the present invention, it is possible to obtain a ventilation and air conditioning system capable of obtaining energy saving and comfort during cooling.

According to the third aspect of the present invention, it is possible to obtain a ventilation and air conditioning system capable of obtaining energy saving and comfort during cooling.

According to the fourth aspect of the present invention, it is possible to appropriately perform natural cooling by introducing outside air together with the effect according to the second or third aspect.

According to the fifth aspect of the present invention, in addition to the effect according to any one of the second to fourth aspects, ventilation without a feeling of cool air during the heating operation becomes possible, and the comfort is improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a ventilation air conditioning system according to an embodiment.

FIG. 2 is a configuration diagram of a heat exchange ventilator of a ventilation air conditioner according to the embodiment.

FIG. 3 is a configuration diagram of an air conditioner of a ventilation air conditioner according to the embodiment.

FIG. 4 is a configuration diagram illustrating a heat exchange ventilation device of the ventilation air-conditioning unit according to the embodiment during a normal ventilation operation.

FIG. 5 is a flowchart illustrating a control operation of the control circuit according to the embodiment;

FIG. 6 is a functional block diagram of a conventional air conditioner.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 heat exchanger, 2 heat exchange ventilator, 3 air conditioner, 6 exhaust fan, 7 air supply fan, 9 indoor suction port, 10 indoor air outlet, 11 control circuit, 12
Outdoor temperature detecting means, 13 Outdoor humidity detecting means, 1
5 Circulating blower, 17 suction port, 18 indoor temperature detecting means, 19 indoor humidity detecting means.

Claims (5)

[Claims] 1. A heat exchange ventilator in which heat is exchanged through a heat exchanger between outside air taken into a room and room air exhausted from the room to the outside through a heat exchanger, and ordinary ventilation without heat exchange can be performed. A ventilation device capable of circulating air in the room and an air conditioning device capable of creating an air-conditioned atmosphere in the room are arranged such that outside air taken into the room of the ventilation device is directed to a suction side of room air of the air conditioning device. To form a ventilation air-conditioning unit having a relevance between the ventilation function and the air-conditioning function. The ventilation air-conditioning unit includes the outdoor air enthalpy calculated from the outdoor temperature and the outdoor humidity, and the indoor air calculated from the indoor temperature and the indoor humidity. A ventilating air conditioning method that controls the operation of heat exchange ventilation and normal ventilation by enthalpy. 2. It is possible to perform heat exchange ventilation in which heat is exchanged between the outside air taken into the room and room air exhausted from the room to the outside through a heat exchanger, and normal ventilation without heat exchange. A ventilation device capable of circulating air in the room and an air conditioning device capable of creating an air-conditioned atmosphere in the room are arranged such that outside air taken into the room of the ventilation device is directed to a suction side of room air of the air conditioning device. A ventilation air-conditioning system in which the ventilation function and the air-conditioning function are related to each other, and the ventilation air-conditioning system is controlled by the control device as follows.
The control means calculates the outdoor air enthalpy from the outdoor temperature and the outdoor humidity, and the indoor air enthalpy from the indoor temperature and the indoor humidity, and when the outdoor air enthalpy is lower than the indoor air enthalpy during the cooling operation of the air conditioner. Controls the ventilator to operate with normal ventilation, and to dehumidify and cool the outside air taken into the room by the air conditioner to blow the air into the room. 3. A heat exchange ventilator in which heat is exchanged between the outside air taken into the room and room air exhausted from the room to the outside through a heat exchanger, and ordinary ventilation without heat exchange is performed. A ventilation device capable of circulating air in the room and an air conditioning device capable of creating an air-conditioned atmosphere in the room are arranged such that outside air taken into the room of the ventilation device is directed to a suction side of room air of the air conditioning device. A ventilation air-conditioning system in which the ventilation function and the air-conditioning function are related to each other, and the ventilation air-conditioning system is controlled by the control device as follows.
The control means calculates the outdoor air enthalpy from the outdoor temperature and the outdoor humidity, and the indoor air enthalpy from the indoor temperature and the indoor humidity, and when the outdoor air enthalpy is lower than the indoor air enthalpy during the cooling operation of the air conditioner. Operate the ventilator with normal ventilation, dehumidify and cool the outside air taken into the room with the air conditioner, and send it to the room.If the outdoor air enthalpy is higher than the room air enthalpy, the ventilation device The operation is performed by heat exchange ventilation, and the outside air taken into the room is controlled to be dehumidified and cooled by the air conditioner and sent to the room. 4. The ventilation / air-conditioning system according to claim 2, wherein the control circuit is configured to control when the outdoor air enthalpy is lower than the indoor air enthalpy and the indoor temperature> the set temperature> the outdoor temperature. Is a ventilation air-conditioning system that controls the air conditioner to operate as a blower. 5. The ventilation air conditioning system according to any one of claims 2 to 4, wherein the control circuit activates the ventilation device when the outside air temperature is lower than the room temperature during the heating operation of the air conditioning device. A ventilating air-conditioning system that is operated by heat exchange ventilation, and controls so that the outside air taken into the room is heated by the air conditioner and blown into the room.