JP2925916B2 - Air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly to a structure of an air conditioner provided with a heat recovery heat exchanger.

[0002]

2. Description of the Related Art As shown in FIG. 9, a ventilation heat recovery unit 301 including a heat recovery heat exchanger, an air filter 302, an air conditioning heat exchanger 303, and a humidifier 304 are provided in a housing 300. An air conditioner including a blower 305 and the like is described in, for example, Japanese Patent Application Laid-Open No. Hei 5-248661.
Are known.

In this type, the ventilation heat recovery unit 3
01 is introduced through the ventilation path 306 on the back side of the air conditioner 01, and the indoor air passes through the air filter 302, is sent to the air-conditioning heat exchanger 303, and is air-conditioned there.
The air is humidified by the humidifier 304 and returned to the room through the ventilation path 307 through the blower 305.

[0004]

However, if the ventilation heat recovery unit 301 is arranged in the ventilation path to the air conditioning heat exchanger 303 as in the prior art, there is a problem that the ventilation resistance increases.

In particular, the space between the ventilation heat recovery unit 301 and the air filter 302 is narrow due to the storage space, and the air 308 passing therethrough receives a large ventilation resistance. There is a problem that efficiency is reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art and to provide an air conditioner capable of minimizing the ventilation resistance in the ventilation path of an air conditioning heat exchanger. .

[0007]

SUMMARY OF THE INVENTION The present invention provides a heat recovery heat exchanger for exchanging heat between discharged indoor air and introduced outdoor air, and an air conditioner for controlling the temperature of the drawn indoor air. An air conditioner comprising a heat exchanger for heat recovery, and arranging the heat exchanger for heat recovery in a ventilation heat recovery unit case, and arranging the ventilation heat recovery unit case in a ventilation path of an air conditioning heat exchanger. The cross section of the ventilation heat recovery unit case on the secondary side is smaller than the cross section of the ventilation heat recovery unit case on the primary side of the ventilation passage.

A heat recovery heat exchanger and an air conditioning heat exchanger are provided, and the heat recovery heat exchanger is disposed in a ventilation heat recovery unit case. In an air conditioner arranged in a ventilation path on a primary side of a heat exchanger, a secondary side of the ventilation heat recovery unit case is formed to have a tapered shape.

Further, a heat recovery heat exchanger and an air conditioning heat exchanger are provided, and the heat recovery heat exchanger is arranged in a ventilation heat recovery unit case. In an air conditioner arranged in a ventilation path on a primary side of a heat exchanger, a side surface of the ventilation heat recovery unit case is formed substantially parallel to an end surface of the heat recovery heat exchanger.

[0010]

In the air conditioner in which the cross-sectional area on the secondary side of the ventilation heat recovery unit case is smaller than the cross section on the primary side, the cross section of the ventilation passage on the secondary side of the ventilation heat recovery unit case becomes large.

The ventilation heat recovery unit case is arranged on the primary side of the air conditioning heat exchanger, and the ventilation heat recovery unit case whose secondary side is tapered has a large ventilation resistance. The cross section of the ventilation path on the primary side of the exchanger becomes larger.

Further, in the case where the side surface of the ventilation heat recovery unit case is formed substantially parallel to the end face of the heat recovery heat exchanger, the cross section of the ventilation path becomes larger than that of the conventional case which is not substantially parallel. .

[0013]

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

In FIG. 1, reference numeral 1 denotes a main body of an air conditioner. This main body 1 is installed, for example, in a room 46 on the second floor so that the room 46 and the room 47 on the first floor can be simultaneously air-conditioned. Has become. The main body 1 has a housing 100, in which a ventilation heat recovery unit 2 and an air conditioning unit 3 are housed, as shown in FIG.

The structure of the ventilation heat recovery unit 2 will be briefly described. As shown in FIG. 3, a ventilation heat recovery unit case 150 is provided.
0, an exhaust blower 21 and a heat recovery heat exchanger 23 are housed therein.

After the outside air OA taken in through the outside air intake blower 20 and the room air RA 'taken in through the exhaust air blower 21 undergo heat exchange in the heat recovery heat exchanger 23, the above-mentioned outside air OA is exchanged. Is the supply air S
A is sent to the air conditioning unit 3 described below.
Note that the room air RA 'is exhausted as exhaust air EA.

As shown in FIG. 2, the air conditioning unit 3 includes an air purifier 4 including a dust collecting filter 5 and a deodorizing filter 6, an air conditioner heat exchanger 7 for heating and cooling circulating air, A humidifier 8 in which porous hydrophilic resin plates 8a are stacked and a blower 9 for air circulation are sequentially housed in the direction of air flow. The heat exchanger 7 has
Via a refrigerant pipe, a refrigerant compressor, a four-way valve, an outdoor heat exchanger, and a decompression device housed in an outdoor unit (not shown) are sequentially connected.

When the main body 1 is installed in the room 46 on the second floor, the air duct 11 connected to the blower 2 is provided between the wall of the room 46 and the main body 1.

An opening 12 is provided at the upper end of the air duct 11.
The opening 12 is connected to an air supply duct 36 located in the ceiling 35 of the second floor. This air supply duct 36 is connected to the outlet chamber 34 on the second floor.
The floor blowing chamber 34 is attached to the ceiling plate 33 of the room 46 on the second floor.

An opening 1 is provided at the lower end of the air duct 11.
The diverter chamber 13 is connected to the opening 14 at the ceiling 40 of the room 47 on the first floor. The air supply duct 41 is connected to the opening 15 (FIG. 2) on the side surface of the diverter chamber 13. Is connected. The air supply duct 41 is connected to an outlet chamber 39 on the first floor, and the outlet chamber 39 on the first floor is attached to a ceiling plate of a room 47 on the first floor.

Further, a suction grille 37 is provided on the wall surface of the room 46 on the second floor, and an air intake duct 38 is connected to the suction grille 37.

The intake duct 38 is arranged on the ceiling 35 of the room 46 on the second floor, and is connected to the return air inlet 10 on the back side of the ventilation heat recovery unit 2. An exhaust port 42 for exhausting internal air is provided on the outer wall of the building.

In this type, when air conditioning is performed through the heat recovery heat exchanger 23, first, the blower 20, the blower 21, and the blower 9 are driven with reference to FIG.

When this is driven, the outdoor air OA and the indoor air RA 'are taken into the heat recovery heat exchanger 23 as schematically shown in FIG. Here, the indoor air after the heat exchange is exhausted outside as the exhaust air EA from the exhaust port 42 through the blower 21, and the outdoor air after the heat exchange passes through the air filter 4 and is subjected to heat exchange for air conditioning. Through the blower 9 and through the blower 9 to each of the blowing chambers 34, 3
9 and is supplied indoors as supply air SA.

When the heat is not passed through the heat recovery heat exchanger 23, the blower 9 is driven. Then, the room air RA is sucked from the suction grill 37, passes through the intake duct 38, the return air inlet 10 on the back side of the ventilation heat recovery unit 2, and the air filter 4, bypasses the ventilation heat recovery unit 2, and directly passes therethrough. The air passes through the air-conditioning heat exchanger 7 and is supplied to the room as the supply air SA through the blower 9.

Reference numeral 200 denotes an outdoor unit, in which a compressor 201 and an outdoor heat exchanger 202 are built.

In the above floor-standing type air conditioner, referring to FIG. 6, if the space between the ventilation heat recovery unit 2 and the air filter 4 is narrow, the air passing therethrough will have a large ventilation resistance. Therefore, the heat exchange efficiency of the air-conditioning heat exchanger 7 decreases.

According to this embodiment, as apparent from FIGS. 7 and 8, the ventilation heat recovery unit case 150 is devised in order to reduce the ventilation resistance.

In FIG. 7, a ventilation heat recovery unit case 150 includes a top plate 151, a side plate 152, and a back plate 153.
And an inspection door 154, and a top plate 151 and a side plate 15
A heat insulating material is stuck to 2 and a part of back plate 153. Further, a center partition plate 161 and a blower partition plate 162 are provided inside the unit case 150, and as shown in FIG. 8, the blowers 20, 21 are partitioned by the respective partition plates.

The ventilation heat recovery unit case 150 is formed so that the cross-sectional area on the downstream side is smaller than the cross-sectional area on the upstream side in the direction of air flow.

More specifically, in the lower region 150a of the unit case 150, as shown in FIG. 7, both ends are cut off obliquely, and thus the unit case 150 is formed in a tapered shape. As shown in FIG. 8, a heat recovery heat exchanger 23 is provided in the lower region 150a of the unit case 150.

The heat recovery heat exchanger 23 includes rails 163 and 163 provided on the side plate 152 of the unit case 150.
The heat recovery heat exchanger 23 is disposed such that the end surface 23 a of the heat recovery heat exchanger 23 is substantially parallel to the tapered side surface 165 of the ventilation heat recovery unit case 150. The dimension A between the side surface 165 and the end surface 23a is set to 50 mm. The dimension A is set such that the ventilation amount of the present invention does not become 99% or less of the conventional ventilation amount (the conventional ventilation amount having the portion B (see FIG. 8)).

According to this, referring to FIG. 6, the room air introduced from return air inlet 10 passes through the back side of ventilation heat recovery unit 2 and passes through heat recovery heat exchanger 23 and air filter 4. And reaches the air-conditioning heat exchanger 7.

At this time, the ventilation heat recovery unit case 150
Is formed such that the cross-sectional area on the downstream side is smaller than the cross-sectional area on the upstream side in the lower region 150a, so that the passage area increases by that much.

Accordingly, since the ventilation resistance of the air passing therethrough decreases, a large amount of air flows, so that the heat exchange efficiency of the air conditioning heat exchanger 7 can be improved. Specifically, the ventilation resistance is reduced by 4 mmH ₂ O as compared with the conventional one having the portion B (see FIG. 8).

As described in this embodiment, when the unit 2 and the air filter are close to each other, the effect of reducing the ventilation resistance according to the present invention is great. Due to this effect, the power of the blower 9 can be reduced, and the blow to the air filter 4 can be made more uniform.

Although the present invention has been described based on one embodiment, it is apparent that the present invention is not limited to this.

[0038]

As described above, according to the present invention, the ventilation passage on the secondary side of the ventilation heat recovery unit case can be enlarged, and the ventilation resistance of the air flowing through the ventilation passage is reduced accordingly. Therefore, air can easily flow through the ventilation path, and the heat exchange rate of the air-conditioning heat exchanger can be improved.

In the case where the ventilation heat recovery unit case is arranged in the ventilation path on the primary side of the air conditioning heat exchanger,
By increasing the cross section of the primary-side ventilation path with a large ventilation resistance and reducing the ventilation resistance of this primary-side ventilation path, the heat exchange rate of the air conditioning heat exchanger is improved. Can be done.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state where an air conditioner according to the present invention is arranged on the second floor.

FIG. 2 is an explanatory diagram showing an internal structure of the air conditioner according to the present invention.

FIG. 3 is an explanatory diagram of a ventilation heat recovery unit.

FIG. 4 is an explanatory diagram showing a ventilation path of the air conditioner of FIG. 1;

FIG. 5 is a perspective view showing a heat recovery heat exchanger of the ventilation heat recovery unit.

FIG. 6 is a sectional view showing an embodiment of the air conditioner according to the present invention.

FIG. 7 is a perspective view showing a ventilation heat recovery unit case.

FIG. 8 is a front view showing the ventilation heat recovery unit case.

FIG. 9 is a sectional view showing a conventional air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Ventilation heat recovery unit 3 Air conditioning unit 7 Air conditioning heat exchanger 23 Heat recovery heat exchanger 23a End face of heat recovery heat exchanger 150 Ventilation heat recovery unit case 165 Side surface of ventilation heat recovery unit case

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F24F 3/147

Claims (3)

(57) [Claims] 1. A heat recovery heat exchanger for exchanging heat between discharged indoor air and introduced outdoor air, and an air conditioning heat exchanger for controlling the temperature of the drawn indoor air,
In the air conditioner in which the heat recovery heat exchanger is disposed in the ventilation heat recovery unit case and the ventilation heat recovery unit case is disposed in the ventilation path of the air conditioning heat exchanger, the ventilation of the primary side of the ventilation path is performed. An air conditioner wherein the cross section of the ventilation heat recovery unit case on the secondary side is smaller than the cross section of the heat recovery unit case. 2. A heat recovery heat exchanger for exchanging heat between discharged indoor air and introduced outdoor air, and an air conditioning heat exchanger for controlling the temperature of the drawn indoor air,
An air conditioner in which the heat exchanger for heat recovery is disposed in a ventilation heat recovery unit case and the ventilation heat recovery unit case is disposed in a ventilation path on the primary side of an air conditioning heat exchanger, wherein the ventilation heat recovery unit An air conditioner, wherein a secondary side of a case is tapered. 3. A heat recovery heat exchanger for exchanging heat between discharged indoor air and introduced outdoor air, and an air conditioning heat exchanger for controlling the temperature of the drawn indoor air,
An air conditioner in which the heat exchanger for heat recovery is disposed in a ventilation heat recovery unit case and the ventilation heat recovery unit case is disposed in a ventilation path on the primary side of an air conditioning heat exchanger, wherein the ventilation heat recovery unit An air conditioner wherein a side surface of a case is formed substantially parallel to an end surface of a heat recovery heat exchanger.