JP2005134026A - Air conditioner with ventilator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To resolve a problem in a conventional air conditioner with a ventilator provided in an outdoor unit wherein a height dimension of the outdoor unit becomes high and there is an installation constraint of no being able to carry out suspension installation in an apartment or the like, and a problem wherein a ventilation duct drawn indoors is cooled by outdoor air and condensation water adheres to a ventilation duct outer face when outdoor air of a dew point or lower of indoor air flows backward in a state of carrying out humidification in heating during the winter season since a reverse flow phenomenon of air flowing from the outdoors into a room occurs when the room becomes a negative pressure with respect to the outdoors due another ventilation system ventilating a whole of the room. <P>SOLUTION: The air conditioner with the ventilator is provided with the ventilator in an outer face of the outdoor unit, and an in-duct back flow check valve is built in an interior. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an air conditioner that can be reduced in size by combining a ventilator with an air conditioner, and to which a ventilation function is added without impairing the installation restrictions and appearance of the outdoor unit.

In a conventional air conditioner with a ventilator, a ventilator comprising a ventilation fan and a ventilating duct for conveying the ventilating air is arranged inside the air conditioner outdoor unit, and the ventilator is connected to the ventilating duct and connected to the other open port. The same piping hole as the refrigerant piping of the air conditioner is used, and it is provided indoors.
(For example, refer to Patent Document 1).

Japanese Unexamined Patent Publication No. 2000-205593 (pages 3 to 4, FIGS. 1, 7, and 8)

  The conventional air conditioner equipped with a ventilator in the outdoor unit is configured as described above, and the ventilator is provided in the upper part of the outdoor unit. Therefore, the height of the outdoor unit becomes high, and it is impossible to install the ceiling in an apartment or the like. There has been a problem that installation restrictions occur.

  In addition, if the room becomes negative with respect to the outside due to another ventilation system that ventilates the whole room, a reverse flow phenomenon occurs in which air flows from the outside to the inside of the room, so the room air is heated and humidified in winter. When outdoor air below the dew point temperature flows backward, there is a problem that the ventilation duct drawn into the room is cooled by the outdoor air and the condensed water adheres to the outer wall of the ventilation duct.

  The present invention has been made to solve the above-described problems, and a first object is to arrange a ventilator on a side surface of a refrigerant pipe connection side of an outdoor outer shell, and to set the width dimension of the refrigerant pipe attachment portion. By making it almost the same as the cover, it is possible to obtain an air conditioner with a ventilation function that has the same installation characteristics as a product without a ventilation function.

  In addition, the second object is to provide a member for preventing the backflow of air in the duct, thereby preventing the problem that condensed water adheres to the outer wall of the ventilation duct when a backflow phenomenon occurs in which air flows from the outside to the inside of the room. An air conditioner with a ventilation function having a mechanism capable of performing the above is obtained.

  An air conditioner with a ventilating function according to the present invention is an air conditioner in which a heat exchanger, an outdoor fan, an electrical component box, and a compressor are arranged in the outer shell of the outdoor unit. Ventilation device is provided.

  An air conditioner with a ventilation function according to the present invention is an air conditioner in which a heat exchanger, an outdoor fan, an electrical component box, and a compressor are arranged in an outer unit of an outdoor unit. In addition to having a ventilation function constituted by a ventilation fan and a ventilation duct, a member for preventing a backflow of air in the ventilation duct is provided.

The air conditioner with a ventilator according to the present invention is provided with a ventilator on the outer side surface of the outdoor unit, and has the same width as that of the cover of the refrigerant pipe mounting portion, so that the outer size of the outdoor unit remains unchanged. It has an effect that an air conditioner with a ventilation function can be installed due to installation restrictions.

  Further, the air conditioner with a ventilator of the present invention is an air conditioner in which a heat exchanger, an outdoor fan, an electrical component box, and a compressor are arranged in an outer unit of an outdoor unit. Has a ventilation function composed of a ventilation fan and a ventilation duct, and has a member to prevent the backflow of air in the ventilation duct, so that air flows back from the outside to the inside of the ventilation duct. This has the effect of preventing and eliminating the problem of condensation on the ventilation duct.

Embodiment 1 FIG.
FIG. 1 is a perspective view of an air conditioner with a ventilation function according to Embodiment 1 of the present invention, and FIG. 2 is a perspective view of the outdoor unit according to Embodiment 1 of the present invention with a part of the panel removed, and a ventilation device. FIG. 3 is a sectional view showing a ventilator according to Embodiment 1 of the present invention, FIG. 4 is an exploded perspective view showing the ventilator according to Embodiment 1 of the present invention, and FIG. 5 is Embodiment 1 of the present invention. FIG. 6 is an exploded perspective view showing the flow prevention valve of the ventilator according to the first embodiment of the present invention, and FIG. 7 shows the ventilator according to the second embodiment of the present invention. FIG. 7 is a perspective view showing a backflow prevention valve of the ventilator.

In the figure, an air conditioner indoor unit 1 includes a heat exchanger 2a, an outdoor fan 2b, an electrical component box 2c, and a compressor 2d arranged in an outer shell 2e of the outdoor unit 2 and connected by a refrigerant pipe 1a. The ventilator 4 is connected to the outer side surface 2f of the outdoor unit 2 and has a size that is substantially the same as the width of the cover 3 of the refrigerant pipe 1a. The ventilation device 4 is connected to the indoor unit 1 through a ventilation duct 5.

The ventilator 4 includes a ventilator body 4a provided with an air passage 4b, a main body cover 4c, a ventilation fan 4d disposed in the air passage 4b, and a suction port provided with a connection port 4e of the main body cover 4c. A bell mouth 4g is provided between the side 4f and the ventilation fan 4d. Moreover, it has the structure which has the exhaust port 4i which discharges air outside in the blowing side 4h behind the ventilation fan 4d. The connection port 4e portion of the suction side 4f is provided with a backflow prevention valve 6 that is opened when air flows from the ventilation duct 5 and is closed when air flows out toward the ventilation duct 5. The backflow prevention valve 6 includes a thin membrane-like valve 6a and a frame-like holder 6b that holds the membrane. The holding portion of the valve 6a has a gap 6c that does not hinder the movement of the valve itself, and the thin valve 6a Has the function of opening and closing with a slight pressure difference due to its own weight.

  Next, the operation will be described. In the normal air conditioner, the refrigerant in the heat exchanger 2a exchanges heat with the operation of the compressor 2d in the outdoor unit 2 to cool the refrigerant and carry it to the indoor unit 1, and the heat exchanger in the indoor unit 1 (Not shown) and room air exchange heat to cool the room air.

  When the air conditioner is in a ventilation operation, in the ventilation device 4 configured as described above, the ventilation fan 4d is driven to drive the ventilation duct 5 that connects the outdoor unit 2 and the indoor unit 1 through the connection port 4e. The room is ventilated by inhaling harmful substances in the room from the suction side 4f and blowing them out from the exhaust port 4i through the blowing side 4h of the ventilation device 4.

At this time, a backflow prevention valve 6 is provided at the ventilation duct connection port 4e on the suction side 4f of the ventilation device 4, and this backflow prevention valve 6 is formed of a thin membrane-like valve 6a and a frame-like shape that holds the membrane. Usually, the valve 6a is held in a closed state by covering the frame-shaped holder 6b, but the holding portion of the valve 6a is a gap 6c that does not hinder the movement of the valve itself. When the ventilation blower 4d is operated and becomes negative pressure, the thin valve 6a is lifted away from the frame-shaped holder 6b because the weight of the thin valve 6a is only a slight weight. It becomes an open state.

  In this ventilation device, when the ventilation fan 4d is stopped, when the room is ventilated by another ventilation system, the indoor side becomes negative pressure, so that the air outside the room flows backward through the ventilation duct 5. In this case, since the valve 6a of the backflow prevention valve 6 is closed, it functions to prevent backflow.

  As described above, the ventilator according to the present invention is provided on the outer side surface of the product and has the same external dimensions as the conventional product. Therefore, the ventilator can be installed under the same installation conditions and has a built-in check valve. Thus, there is an effect that the air can be prevented from flowing backward from the outdoor side toward the indoor side in the ventilation duct, and the problem of dew condensation on the ventilation duct can be solved.

Embodiment 2. FIG.
In the first embodiment described above, the membrane-like backflow prevention valve 6 is incorporated, but a second embodiment having a conical backflow prevention valve in place of the frame-shaped holder will be described. FIG. 7 is a cross-sectional view showing a ventilator according to Embodiment 2 of the present invention, FIG. 8 is a perspective view showing a backflow prevention valve of the ventilator according to Embodiment 2 of the present invention, and (a) is an explanatory diagram of a closed state, (B) is explanatory drawing of an open state. In the ventilator configured in the same manner as in the first embodiment, a conical backflow prevention valve 7 having a similar function in a different shape will be described instead of the backflow prevention valve 6 shown in the first embodiment.

The conical backflow prevention valve 7 is formed into a cylindrical bottom portion 7a and a conical thin film, and has a plurality of cuts 7c from the apex 7b of the cone, and can be opened and closed in a petal shape. It has the function of opening and closing with a slight pressure difference due to the flexibility of the elastic body.

  Next, the operation will be described. The backflow prevention valve 14 usually has a conical shape, which is the shape when the elastic body is molded, but when the ventilation blower 4d is operated and becomes negative pressure, air will flow from the cylindrical bottom surface 7a toward the apex 7b. Therefore, a plurality of cuts 7c provided from the apex 7b of the cone are opened, and the conical portion is opened in a petal shape to be in an open state.

  When the ventilation blower 4d of the ventilation device 4 according to the second embodiment is stopped, when the room is ventilated by another ventilation system, the indoor side becomes negative pressure, so that the outdoor side via the ventilation duct 5 is provided. When the air is going to flow backward, air tends to flow from the conical apex 7b of the conical backflow prevention valve 7 toward the bottom 7c. The plurality of cuts 7c provided from the apex 7b are closed by receiving a force in the closing direction and function to prevent backflow.

  As described above, the problem of dew condensation on the ventilation duct 5 can be solved by incorporating the conical backflow prevention valve 7 as in the first embodiment.

It is a perspective view of the air conditioner with a ventilation function in Embodiment 1 of this invention. It is a perspective view which removes a part of panel and shows the outdoor unit in Embodiment 1 of this invention. It is sectional drawing which shows the ventilation apparatus in Embodiment 1 of this invention. It is a disassembled perspective view which shows the ventilation apparatus in Embodiment 1 of this invention. It is sectional drawing which shows the backflow prevention valve of the ventilator in Embodiment 1 of this invention. It is a disassembled perspective view which shows the flow prevention valve of the ventilation apparatus in Embodiment 1 of this invention. It is sectional drawing which shows the ventilation apparatus in Embodiment 2 of this invention. It is a perspective view which shows the backflow prevention valve of the ventilator in Embodiment 2 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Air conditioner indoor unit, 2 Air conditioner outdoor unit, 2a Heat exchanger, 2b Outdoor fan, 2c Electrical component box, 2d Compressor, 3 Cover of refrigerant piping, 4 Ventilation device, 4a 4b 4c 4d Ventilation fan, 4e connection port, 4f inlet side, 4g bell mouth, 4h outlet side, 4i exhaust port, 5 ventilation duct, 6 backflow prevention valve, 6a thin valve, 6b holder, 6c clearance, 7 conical backflow prevention valve, 7a cylindrical bottom, 7b Cone apex, 7c cut.

Claims (5)

In an air conditioner in which a heat exchanger, an outdoor fan, an electrical component box, and a compressor are arranged in the outer shell of the outdoor unit, a ventilation device is provided on the outer side surface of the outdoor unit. Air conditioner with function. The air conditioner with a ventilator according to claim 1, wherein the ventilator is arranged on a side surface of the outdoor unit outer wall on the refrigerant pipe connection side, and the width dimension thereof is substantially the same as that of the refrigerant pipe cover. In an air conditioner in which a heat exchanger, an outdoor fan, an electrical component box, and a compressor are arranged in the exterior of the outdoor unit, the indoor unit or the outdoor unit has a ventilation function configured by a ventilation fan and a ventilation duct. An air conditioner with a ventilation function, characterized by having a member for preventing backflow of air in the ventilation duct. 4. The air conditioner with a ventilator according to claim 3, wherein the air conditioner is equipped with a thin membrane valve and a frame-like holder for holding the membrane, and the holding portion of the valve includes a backflow prevention valve having a gap. 4. A conical backflow prevention valve which is formed into a thin conical film shape and has a plurality of cuts from the apex of the cone and opens and closes with a slight pressure difference in a petal shape. Air conditioner with ventilator.

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