JPH0650181B2 - Air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention introduces underfloor air into an indoor unit of a separate type air conditioner to ventilate and cool a room using natural cool air. The present invention relates to an air conditioner capable of increasing the operating rate of the device and reducing the power cost.

[Conventional technology]

A so-called separate type air conditioner in which an outdoor unit and an indoor unit are separated is often used as an air conditioner for cooling a room.

In such a separate type air conditioner, the heat medium in the outdoor unit releases the stored latent heat to the atmosphere, is cooled, and is conducted to the indoor unit through the pipe connecting the outdoor unit and the indoor unit. Then, the room is cooled by exchanging heat with the air in the room in the indoor unit.

[Problems to be Solved by the Invention]

Therefore, the air in the room circulates between the indoor unit and the indoor unit in a state of being isolated from the outside air, and the indoor unit does not have a function of ventilating the room.

On the other hand, before and after midsummer, that is, in the early summer, early autumn, and at night, it is often sufficient to lower the temperature of the room by 2 to 4 degrees relative to the outside air, but even in such a case, the separate type In this air conditioner, a general air conditioner that circulates the heat medium between the outdoor unit and the indoor unit must be used, resulting in high power cost and high cost.

The inventors, as a result of earnest research to solve the above problems,
It has been found that the temperature of the underfloor air is 4 to 5 degrees lower than the temperature of the outside air, and the temperature of the room can be lowered by introducing the underfloor air into the room.

The present invention is based on the provision of a damper that can selectively introduce room air and underfloor air into a duct that communicates with a ventilation path of an indoor unit. Aims to provide an air conditioner that can cool and ventilate using underfloor air, reduce power costs, and increase device utilization efficiency.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, in the air conditioner of the present invention, a room in which a heat exchanger through which a heat medium from an outdoor unit passes is provided in a ventilation path that connects an air intake and an air outlet and has a fan. A machine is arranged with the outlet facing the room, and the intake has a room vent through the room and through which room air passes and an underfloor through the floor and through which underfloor air passes and the room vent And a duct with a damper for selectively opening and closing the underfloor vent.

Further, the damper can electrically perform the opening / closing operation by a detection output of a sensor that detects a temperature of room air and a temperature of underfloor air.

Furthermore, the damper includes a first damper that opens and closes the room vent, and a second damper that opens and closes the underfloor vent, and the first and second dampers are the first and second dampers. The latches that can selectively release the dampers are respectively held at the closed positions, and the first and second dampers are selectively opened when the latches are released by negative pressure generated by driving the fan. It can also be formed.

[Action]

Since the duct with the underfloor air vent through which the underfloor air passes is provided at the intake of the indoor unit, the underfloor air can be guided to the room, the room can be ventilated, and in the middle period or the night before and after the midsummer. Can cool the room with the underfloor air without operating the outdoor unit. Since the duct is provided with a damper that selectively opens and closes the room ventilation port and the underfloor ventilation port, when the room is air-conditioned, cooling by a heating medium using an outdoor unit, ventilation by underfloor air, or cooling is selectively performed. It is possible to increase the operating rate of the device and measure the effective use of the device.

Also, if the damper is formed to open and close with a sensor that detects the temperature of the room air and the temperature of the underfloor air, it is possible to automatically switch between cooling by the heating medium and ventilation and cooling using the underfloor air. It also improves usability and helps reduce power costs.

Further, in the case where the first and second dampers are provided with latches that can be respectively disengaged and formed so that the latches can be selectively released, the dampers can be switched without using power, and power can be saved. The structure is simplified and the cost of the device can be reduced.

〔Example〕

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

1 to 7, an air conditioner 1 of the present invention is a device for cooling a room R, and an indoor unit 4 arranged in the room R and a pipe 5 for circulating a heat medium between the indoor units 4. And an outdoor unit 6 connected via.

The indoor unit 4 is housed in the box body 12 provided on the floor body C of the room R. In addition, the outdoor unit 6 is provided below the floor C and on the floor base surface E.
And in the underfloor space H surrounded by the cloth foundation G.

The underfloor space H communicates with the outside air through a ventilation port J provided in the cloth foundation G.

The outdoor unit 6 draws in the air in the underfloor space H and exchanges heat with the heat medium, and the air heated to a high temperature is exhausted to the outside through an exhaust duct 43 passing through the cloth foundation G.

The indoor unit 4 has an air intake 7 on the lower surface, a front surface and a room R.
An air passage 10 in which a fan F capable of supplying air from the intake 7 to the air outlet 9 is interposed is formed inside the base body 41 provided with the air outlet 9 facing the air outlet 9, and the air passage 10 extends from the outdoor unit 6 to the air passage 10. A heat exchanger 11 is provided which can exchange heat with the air flowing through the ventilation passage 10 by driving the fan F through which the heat medium passes.

The indoor unit 4 has a connecting pipe 42 for connecting the pipe body 5 through which the heat medium passes.
Is installed.

The box body 12 includes a front plate 44 and a rear plate 4 which are erected on the front and rear sides.
5 has a box-like shape of a lower opening in which an upper plate 47 is installed on the upper edge of a rectangular frame having both end portions surrounded by side plates 46, 46, and the front plate 44 has an opening having a relatively large area. It comprises a cabinet 13 having a portion K, and a cover body 50 which covers the opening portion K and which has an outlet grill 2 and an intake grill 49 provided above and below.

As shown in FIG. 4, the cabinet 13 is provided with a pair of crosspieces 52, 52 extending in the front-rear direction and at the same height and having a rectangular cross section on the inner side surfaces of the side plates 46, 46 arranged on both sides. The slide shelf 14 is bridged over the upper surfaces of the crosspieces 52, 52. The slide shelf 14 can also be slid back and forth on the crosspieces 52, 52 by removing the cover body 50, and can also be removed from the crosspieces 52, 52.

The indoor unit 4 can be attached to the slide shelf 14 by fixing the mounting bracket 53 provided below the indoor unit 4 on the slide shelf 14 using a fixture such as a bolt. In addition, the slide shelf 14 is provided with a cut portion 54 which is aligned and cut with the intake 7 of the indoor unit 4.

Since the indoor unit 4 is attached to the retractable slide shelf 14 provided in the box body 12 in this manner, the indoor unit 4 can be attached outside the box body 12, and the workability of attaching the indoor unit 4 is improved. Can be improved.

The box 12 is installed on the floor C as described above,
An opening D formed of a rectangular hole smaller than the installation area of the box 12 is formed in the floor C below the box 12, and the opening D is connected to the intake 7 of the indoor unit 4. Duct 1
5 is inserted.

The duct 15 is an upper duct 15A located above the floor C.
And a lower duct 15B protruding from the floor C to the underfloor 13.

The upper duct 15A is air-tightly connected to the intake 7 of the indoor unit 4 by a flange projecting at the upper end of the upper duct 15A, and the lower duct 15A is attached to the lower end of the base body 56 having a hollow rectangular cross section.
The flange 57 for B connection is projected.

On the front surface of the upper duct 15A, there is provided a room vent 16 through which the air in the room R passing through the intake grill 49 of the box 12 and entering the box 12 can be introduced into the upper duct 15A. Inside the room, a room vent 16 and a damper 17 for selectively opening and closing the inside of the upper duct 15A below the room vent 16 are provided.

In the present embodiment, the damper 17 engages a damper shaft 59, which is inserted through the upper duct 15A below the room vent 16 and along the room vent 16, with the reduction motor M fixed to the upper duct 15A. The damper shaft 59 is provided with blades 60 made of a plate that can be tilted by the operation of the reduction motor M. The blade 60 closes the room ventilation hole 16 by standing and the duct 1 below the room ventilation hole 16
By venting the inside of 5A and collapsing horizontally, the room vent 16 is opened and the air in the duct 15A below the room vent 16 is blocked.

The lower duct 15B is placed on the floor C above the opening D, and is box-shaped with an upper part opened to surround the through hole 20 provided in the center of the cover plate 19 that covers the opening D. And a chamber 22 forming

The chamber 22 is provided with an underfloor vent 21 that allows the underfloor B and the inside of the lower duct 15B to communicate with each other.

Further, the cover plate 19 is provided with a hole portion 24 through which the tube body 5 can be inserted.

In the lower duct 15B, the chamber 22 is inserted into the through hole portion 20 from the room R side, the through hole portion 20 is projected to the underfloor B and the cover plate 19 is placed on the floor body C, and The cover plate 19 and the floor C are fixed at the peripheral edge with screws or the like.

Further, in the upper duct 15A, the flange 57 is brought into contact with the cover plate 19 and the flange 57 and the cover plate 19 are bolted together, whereby the upper duct 15A and the lower duct 15B are integrally connected to form the duct 15. .

Therefore, the lower duct 15B is electrically connected to the intake 7 of the indoor unit 4 via the upper duct 15A, and the duct 15 is provided with a damper 17 for selectively opening and closing the room vent 16 and the underfloor 21. .

The blowout port 9 of the indoor unit 4 is connected to the blowout grill 2 provided in the box body 12 by a blowout duct 62.

In this embodiment, the blowout grill 2 has a hole 51 in the cover body 50.
A pair of first wing pieces 2 parallel to the inside of the outer frame 25 attached to the
An inner frame body 27 having 6 and 26 is tiltably supported, and the first wing piece 2 is provided between the first wing pieces 26 and 26.
A second blade piece 29 is provided which is orthogonal to 6 and 26 and is tiltable.

Therefore, by tilting the first blade 26, it is possible to change the wind direction of the air discharged from the indoor unit 4 in the vertical direction, and by tilting the second blade 29, the air can be moved to the left and right. The wind direction can be changed in the direction of.

Further, in this embodiment, the opening and closing of the damper 17 is electrically operated by the detection output of the sensor.

A first sensor 32 for detecting the temperature of the air in the room R is located near the intake grill 49 of the box 12, and a temperature of the air in the underfloor space H is located near the underfloor vent 21 of the underfloor B. A second sensor 33 is provided. A humidity sensor capable of detecting the humidity of the room R and the underfloor space H is also attached to the first and second sensors 32 and 33, and the detection output of each of the first and second sensors 32 and 32 is the indoor unit 4 And is led to an arithmetic unit 64 provided in the computer and having a built-in computer. In addition, calculator 64
Outputs a signal for operating the reduction motor M for opening and closing the damper 17. Further, in the present embodiment, a wireless manual operation device 65, which is separated from the box body 12, is provided, and its signal is transmitted to the receiver 66 provided in the box body 12 and connected to the arithmetic unit 64 by using radio waves as a medium. Transmitted.

The manual operation unit 65 can individually turn on and off the indoor unit 4 and the outdoor unit 6 via the computing unit 64, and the damper 17 can be manually operated.
Can be opened and closed.

However, the first and second sensors 32 and 33 detect the respective temperatures and transmit the detection output to the arithmetic unit 64. The arithmetic unit 64 calculates the output signals of both sensors 32 and 33 and the temperature of the room R is below the floor B. When the temperature is higher than the temperature, both the indoor unit 4 and the outdoor unit 6 are operated, and as shown in FIG.
7 opens the room vent 16 and closes the underfloor 21.

Therefore, the air in the room R enters the indoor unit 4 from the intake 7 from the intake grill 49 to the room ventilation port 16 and the upper damper 17A. When the heat medium sent to the air flows through the heat exchanger 11, the air passing through the ventilation passage 10 of the indoor unit 4 exchanges heat with the heat medium by the heat exchanger 11, becomes cold air, and blows out from the outlet 9. The gas is discharged into the room R through the grill 2 and the room R can be cooled.

On the other hand, when the temperature of the room R is lower than the temperature of the underfloor B, the signal of the computing unit 64 stops the outdoor unit 6 and operates only the indoor unit 4, while the damper 17 is turned off as shown in FIG. , The room vent 16 is closed and the underfloor vent 21 is opened.

Therefore, the underfloor air is sucked by the fan F of the indoor unit 4 from the underfloor vent 21 to the lower damper 15B and the upper damper 15.
After passing through A, it flows into the indoor unit 4 and is discharged into the room R through the outlet 9 and the outlet grill 2 while keeping the temperature of the underfloor air without performing heat exchange with the heat medium by the heat exchanger 11. R cooling and ventilation can be performed.

As described above, when the underfloor air is guided to the room R, the outdoor unit 6 is stopped, and therefore the cooling by the heat medium is not performed, so that the power cost required for the air conditioning is greatly reduced. By providing the first and second sensors 32 and 33 respectively with sensors for detecting humidity, the damper 17 can be operated by the difference in humidity as in the case of the temperature difference.

FIG. 8 shows another embodiment of the present invention.

In this embodiment, the duct 15 is provided with a room vent 16 and an underfloor vent 21, and the room vent 16 and the underfloor vent 21 are opened by a negative pressure generated by driving a fan F provided in the indoor unit 4. First damper 17A and second damper
The respective dampers 17B are provided.

Latches 35 and 36 for locking the opening of the first and second dampers 17A and 17B are attached to the first and second dampers 17A and 17B, respectively.
Is operated by one operation tool 69 to move the first damper 17
When A is locked, the second damper 17B is disengaged, and when the first damper 17A is disengaged, the second damper 17B is disengaged.
The damper 17B is formed so as to engage with it.

Therefore, when the latch 35 of the first damper 17A is released, the negative pressure of the fan F causes the room air to flow into the room vent 1.
The underfloor air can enter through the underfloor vent 21 by releasing the latch 36 of the second damper 17B.

In this way, the room vent 16 and the underfloor vent 21 can be selectively opened and closed by forming the engagement and disengagement of the two latches so as to operate in reverse to each other and utilizing the negative pressure of the fan F.

As described above, the present invention can be modified into various aspects.

〔The invention's effect〕

As described above, the air conditioner of the present invention is provided with an indoor unit and an outdoor unit, and at the intake of the indoor unit, a room ventilation hole through which room air passes and an underfloor ventilation hole through which underfloor air passes, and the two ventilation holes. Since it has a damper that selectively opens and closes
Even with a separate type air conditioner, it is possible to cool and ventilate the room with outside air.In addition, in the case of outside air cooling, since the underfloor air that is cooler than the room is introduced, the underfloor air can be removed before or after midsummer or at night. Since the outdoor unit can be stopped at the time of introduction, the power cost can be reduced and the utilization efficiency of the device can be improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the present invention, FIG. 2 is a perspective view showing a main part thereof, FIG. 3 is a perspective view showing an indoor unit, a duct and a box body in a disassembled state, and FIG. Is an exploded perspective view showing the attachment of the box body and the indoor unit, FIG. 5 is a perspective view showing the blowout grill, FIGS. 6 and 7 are sectional views showing the operation, and FIG. 8 is a sectional view showing another embodiment. Is. 4 ... Indoor unit, 5 ... Tube, 6 ... Outdoor unit, 7 ... Intake, 9 ... Blowout port, 10 ... Ventilation passage, 11 ... Heat exchanger, 12 ... Box, 15 ...... Duct, 16 …… Room vent, 17 …… Damper, 17A …… First damper, 17B …… Second damper, 21 …… Underfloor vent, 22 …… Chamber, 31 …… First Sensor, 32 ... Second sensor, 35, 36 ... Latch, B ... Underfloor, F ... Juan, R ... Room.

Claims (3)

[Claims] 1. An indoor unit in which a heat exchanger through which a heat medium from an outdoor unit passes is provided in an air passage that connects an air intake and an air outlet and has a fan, and the air outlet is arranged toward the room. At the same time, the intake has a room vent that communicates with the room and through which room air passes and an underfloor vent that communicates under the floor and through which underfloor air passes, and a damper that selectively opens and closes the room vent and the underfloor vent. An air conditioner equipped with a duct equipped with. 2. The air conditioner according to claim 1, wherein the damper electrically performs the opening / closing operation by a detection output of a sensor that detects a temperature of room air and a temperature of underfloor air. 3. The damper includes a first damper that opens and closes the room vent, and a second damper that opens and closes the underfloor vent, and the first and second dampers include the first and second dampers. The latches that can selectively release the second damper are held at the respective closed positions, and the first and second dampers are selectively opened when the latches are released due to the negative pressure generated by driving the fan. The air conditioner according to claim 1, wherein: