JP3056615B2 - Heat exchange ventilation air conditioning system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchange ventilation air conditioning system for simultaneously performing ventilation and air conditioning for cooling and heating in a building.

[0002]

2. Description of the Related Art In recent years, in offices and houses, not only air conditioning for cooling and heating but also indoor IAQ (air quality) has been highlighted. In particular, high airtightness is increasing in houses, and an air conditioning system with low noise and comfortable ventilation is required.

Conventionally, there has been an air conditioner (air conditioner) for cooling and heating and a heat exchange type ventilation device such as a so-called air conditioning ventilation fan for a house. In particular, air-conditioning ventilation fans that are effective for ventilation during air-conditioning are now attracting attention again as energy savings. Also, a heat exchange ventilation air conditioning unit combining these is considered. The configuration will be described with reference to FIG.

[0004] As shown in the figure, in a heat exchange ventilation unit 102 installed in the ceiling 101, air in a room 104 is sucked from an air opening 103, and is divided into an air 106a and an exhaust 106b at a branch portion 105. The air 106 a passes through the indoor blower 107 and the indoor heat exchanger 108, and is supplied to the room 104 through the air supply port 109. On the other hand, the exhaust gas 106 b passes through the heat exchange element 110 and is exhausted to the outdoor 112 by the outdoor blower 111. At this time, outdoor fresh air 113 is supplied to the other passage of the heat exchange element 110 by the indoor blower 107, heat is exchanged by the heat exchange element 110, and fresh air close to the temperature and humidity of the indoor air is provided. Air 113 is ring air 1
06a , passes through the indoor blower 107, and is heated or cooled by the indoor heat exchanger 108.
Air was supplied to the room 04, and air conditioning was being performed.

In order to reduce noise, in addition to taking measures against the blower itself, a blower that does not use a motor or a blade, which is a fundamental source of noise of the blower, has been proposed.
There is a ventilator (blower) like 28. Hereinafter, the configuration will be described with reference to FIG.

As shown in the figure, a blower 114 has a throttle portion 115 formed by reducing a diameter of a part of a cylindrical portion. A nozzle 116 penetrates a wall of the blower 114 and an injection port at the tip thereof. Reference numeral 117 is located substantially at the center of the throttle unit 115.

In the above-described configuration, when the pressurized air 118 is injected from the injection port 117 of the nozzle 116, the air inside the blower main body 114 is attracted to the throttle portion 115, and the attracting action is generated from the left side of the drawing. The air flows to the right along with the pressurized air 118, so that the air can be blown without using the electric motor and the blades.

[0008]

In such a configuration of the conventional heat exchange ventilation unit 102, since the indoor blower 107 simultaneously supplies the indoor air 106a and the outdoor air 113, the actual problem is the air circulation. It is difficult to adjust the balance between air supply and air supply due to the resistance of the duct and the like. For this reason, a separate air supply blower is provided to adjust the balance, but the number of blowers increases to three, and as a result, the heat exchange ventilation air conditioning unit itself becomes large, the input increases, and There is a problem that generated noise is increased.

Even if a blower 114 as shown in FIG. 5 is used to solve the problem, when the pressurized air 118 is supplied from the outdoor air, the external air is directly introduced into the room,
There has been a problem that the indoor comfort is impaired and the load of cooling and heating increases, which is against energy saving.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is a first object of the present invention to provide a heat exchange ventilation air-conditioning system which has low noise, low input, energy saving, and balance of fresh air introduction. Aim.

A second object of the present invention is to provide a heat exchange ventilation air-conditioning system capable of further reducing noise and reducing the size of the system.

A first object of the present invention for achieving the first object is as follows.
Means, in a return air passage communicating between the indoor air return port and the indoor air supply port, an indoor heat exchanger for cooling and heating the room,
A branch portion is provided in the return air passage of an air conditioning unit including an induction blower that induces air by blowing out pressurized air, and a pressurized air supply unit that supplies pressurized air to the induction blower. Connecting an exhaust duct for exhausting part of the indoor air passing through the indoor return air outlet to the outside,
An air supply duct for providing a heat exchange element and an air blower in the exhaust duct, and for supplying air from outside to the room,
A flow path is formed so as to intersect with the exhaust duct and the heat exchange element, and the air supplied to the pressurized air supply means supplies outdoor air after passing through the heat exchange element in the air supply duct. Connected, and blows out the outdoor air pressurized by the pressurized air supply means toward the indoor side of the induction blower, so that the air flowing through the return air passage according to the pressurized outdoor air amount is reduced. attract, mixing the air flowing through the return air passage and the outdoor air, depending on the outdoor air quantity
Adjust the return air volume to balance the fresh air introduction
The heat exchange ventilation air conditioning system supplies air from the air supply port.

[0013] A second means for achieving the second object is an exhaust air blower for exhausting air by blowing out pressurized air into an exhaust duct, and a blower for the exhaust air blower. An exhaust air supply means for supplying compressed air is provided outside the room to provide a heat exchange ventilation system for exhausting room air.

[0014]

According to the first aspect of the present invention, the pressurized air supplied to the induction blower is heat-exchanged with the exhaust air by the heat exchanging element by the above-described first means, and becomes air close to the temperature and humidity of the room. By mixing with the return air of the air conditioner, the air-conditioning unit can save energy, and the intake air blower can reduce the input with low noise and balance the introduction of fresh outside air.

Further, by providing the exhaust air blower and the exhaust pressurized air supply means for the exhaust air with the configuration of the second means, the noise can be further reduced and the system can be downsized.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG.

As shown in the figure, an indoor heat exchanger 4 for cooling and heating the room and a pressurized air are blown into a return air passage 3 communicating the indoor air return port 1 and the indoor air supply port 2. An induction blower 5 that induces air by being caused to be provided,
A blower fan 6, which is a pressurized air supply unit that supplies pressurized air to the induction blower 5, is installed, and is connected to the induction blower 5 by a connection pipe 7. Return air passage 3
A branch portion 8 is provided therein, an exhaust duct 9 for exhausting a part of the indoor air to the outside of the room is connected, and a heat exchange element 10 and a blower 11 for exhaust are installed in the exhaust duct 9. I have. An air supply duct 12 for supplying air from the outside to the room.
Has a flow path formed so as to intersect with the exhaust duct 9 at the heat exchange element 10, and the air supply duct 12 is connected to the blower fan 6 after passing through the heat exchange element 10.

FIG. 2 shows details of the structure of the induction blower 5.
This will be described with reference to FIG. As shown in the drawing, the induction blower 5 is a trumpet-shaped ventri 15 that smoothly connects the conical cylinder 14 and the cylinder 13, and is located inside the end of the venturi 15 on the side of the conical cylinder 14, An orifice 17 that forms an annular gap 16 between the outer peripheral portion and the conical cylindrical portion 14, and fixes the orifice 17, surrounds the orifice 17 and the venturi 15, and has a cylindrical shape formed outside thereof. The first duct 7 is connected to the suction port 19 of the orifice 17, and the second duct is connected to the discharge port 20 of the venturi 15.
Duct 10 is connected. A connection cylinder 21 that communicates with the inside of the pressure chamber 18 is protrudingly provided on the pressure chamber 18 of the induction blower 1, and is connected to the blower fan 6 by a connection pipe 7 (not shown).

The induced blowing will be described with reference to the configuration of the induced blowing device 5. The pressurized air flows into the pressure chamber 18 of the induction blower 5 through the connection tube 21, and is blown out from the gap 16 toward the discharge port 20 into the venturi 15. At this time, an attraction action occurs in which the air inside the venturi 15 is drawn to the discharge port 20, and the air flow flows from the suction port 19 to the discharge port 20 by this attraction action.

Next, the operation of the heat exchange ventilation air conditioning system will be described. The induction blower 5 of FIG. 1 is installed in a direction opposite to the drawing of the induction blower 5 of FIG. 2, and the direction of air flow is opposite to that of FIG.

The indoor air flows from the indoor air return port 1 to the branch portion 8.
Through the ventilating device 5 shown in FIG. When the blower fan 6 is operated, the outside air that has passed through the heat exchange element 10 is sucked into the blower fan 6 from the air supply duct 12, becomes pressurized air, is blown out from the connection pipe 7 through the connection pipe 21, and is blown out from the gap 16, and the indoor air Is attracted, along with the outside air blown out,
After being heated or cooled by the indoor heat exchanger 4, the air is supplied into the room through the indoor air supply port 2. The indoor heat exchanger 4 is connected to an outdoor unit 22 via a refrigerant pipe 21 to form a heat pump cycle (not shown), and is cooled by switching a four-way valve (not shown) in the outdoor unit 22. And heating operation is enabled.

On the other hand, the air passing through the exhaust duct 9 from the branch portion 8 is heat-exchanged with the above-described air supply by the heat exchange element 10 and then exhausted outside by the outdoor blower 11. As the heat exchange element 10, a total heat exchange element for exchanging temperature and humidity is mainly used. Therefore, outdoor air supplied to the air supply duct 12 is high in both temperature and humidity at the time of cooling, but compared to outside air. In order to exchange total heat with indoor air having low temperature and humidity, the temperature becomes close to the indoor temperature and humidity. Therefore, the air is pressurized by the blower fan 6, supplied to the induction blower 5, and then cooled by the heat exchanger 4. Even in this case, the cooling load is reduced as compared with the case where the outside air is directly introduced, and energy can be saved. Further, the amount of the induced air (return air) can be adjusted by the amount of the pressurized air (outside air), so that the introduction of outside air can be balanced.

As described above, according to the heat exchange ventilation air conditioning system of the first embodiment of the present invention, the pressurized air supplied to the induction blower is the outdoor air after heat exchange with the exhaust air by the heat exchange element. As a result, the air that is close to the temperature and humidity in the room is mixed with the return air from the room, and while the energy-saving of the air conditioner is ensured, the input is low and the input is low, and the introduction of fresh outside air is balanced by the induction blower. Can be.

Next, a second embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. Since the configuration and operation are the same as those of the first embodiment, detailed description will be omitted.

Here, in order to exhaust indoor dirty air to the outside of the room, an exhaust air blower 23 and a blower fan 2 having the same structure as the air blower 5 are installed in the exhaust duct 9.
4 are installed.

With the above configuration, since the exhaust air induction blower 23 and the exhaust blower fan 24 are installed in the exhaust duct 9, a normal fan is not used as a heat exchange ventilation air conditioning system, so that noise can be reduced. Further, by installing the exhaust air blower 23 and the exhaust blower fan 24 outside the room, the size of the entire system can be reduced.

As described above, according to the heat exchange ventilation air-conditioning system of the second embodiment of the present invention, the exhaust air is provided with the exhaust air blower and the exhaust blower fan, and is installed outdoors to further reduce noise and reduce system noise. Can be downsized.

In the embodiment of the present invention, the exhaust air blower 23 is installed outside the room, but it may be installed indoors behind the ceiling.
The effect remains the same. In addition, the exhaust air blower 23 and the exhaust blower fan 24 may be integrated and installed outside the room, which has the effect of further reducing the size of the system.

[0029]

As is clear from the above embodiments, according to the present invention, the pressurized air supplied to the induction blower is the outdoor air after heat exchange with the exhaust air by the heat exchange element. By mixing the air near the temperature and humidity inside the room with the return air from the room, the air conditioner is kept energy-saving, while the input is low and the input is low due to the outdoor air blower.
Thus, it is possible to provide a heat exchange ventilation air conditioning system that adjusts the amount of return air and balances the introduction of fresh outside air.

Further, by providing an exhaust air blower and an exhaust blower fan for the exhaust air and installing the air blower outdoors, it is possible to provide a heat exchange ventilation air conditioning system capable of further reducing noise and reducing the size of the system.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a heat exchange ventilation air conditioning system according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the induction blower.

FIG. 3 is a configuration diagram of a heat exchange ventilation air conditioning system according to a second embodiment.

FIG. 4 is a configuration diagram of a conventional heat exchange ventilation air conditioning unit.

FIG. 5 is a sectional view of a conventional blower body.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 indoor return air opening 2 indoor air supply opening 3 return air passage 4 indoor heat exchanger 5 induction blower 6 blower fan (pressurized air supply means) 8 branch 9 exhaust duct 10 heat exchange element 11 exhaust blower 12 air supply Duct 23 Exhaust air blower 24 Exhaust blower fan

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-332323 (JP, A) JP-A-4-103927 (JP, A) JP-B-60-53819 (JP, B2) (58) Field (Int.Cl. ⁷ , DB name) F24F 1/00 441 F04F 5/20 F24F 7/08 101

Claims (2)

(57) [Claims] 1. An indoor heat exchanger for cooling and heating the room in a return air passage communicating between the indoor air return port and the indoor air supply port, and an attraction for inducing air by blowing out pressurized air. A branch portion is provided in the return air passage of an air conditioning unit including a blower and a pressurized air supply unit that supplies pressurized air to the induced blower, and a portion of room air passing through the indoor return air port is provided. The air duct is connected to an exhaust duct for exhausting the air to the outside of the room, a heat exchange element and a blower for exhaust are provided in the exhaust duct, and the air supply duct for supplying air from outside to the room is the exhaust duct. Forming a flow path so as to intersect with the heat exchange element, the air supplied to the pressurized air supply means is connected to supply the outdoor air after passing the heat exchange element in the air supply duct, Outdoor air pressurized by the pressurized air supply means, By blowing the air to the indoor side of the induction blower, the air flowing through the return air passage is attracted according to the amount of the outdoor air pressurized, and the outdoor air and the air flowing through the return air passage are mixed. , Depending on the outdoor air amount
Adjust the return air volume to balance the fresh air
And a heat exchange ventilation air conditioning system for supplying air from the air supply port. 2. An exhaust air blower for inducing air by blowing out pressurized air into an exhaust duct, and an exhaust air supply means for supplying pressurized air to the exhaust air blower. The heat exchange ventilation system according to claim 1, which is provided outside the room and exhausts room air.