JPH0460331A - Air conditioner with ventilating function - Google Patents

Abstract

PURPOSE:To perform a ventilating operation without damaging a cooling or a heating operation by a method wherein when an air conditioning operation is carried out, a certain difference is set in a rotational speed in such a way as the amount of blown air of a suction side blower is lower than that of a blowing side blower and then fresh air (surrounding air) is fed into an air passage with its air amount difference. CONSTITUTION:During a heating operation, a volume 40 at an operating part 37 is rotated toward a ventilation amount adjusting region 41a in response to a ventilation amount when a ventilation is to be carried out. Then, a control part 35 energizes a solenoid 30 and releases a ventilation port 10. The control part 35 outputs a control signal to a rated rotating means 41 and sets the number of revolution of a blown side blower 33, which is set by the indoor heat exchanging temperature, equal to the number of revolution at the time of operation. Consequently, a control signal to be controlled to a duty ratio corresponding to a rotational displacement of the volume 40 is outputted to a switching circuit 32c for a suction side blower 32 from the number of revolution variable circuit 42 for ventilation so as to reduce the number of revolution of the suction side blower 32. With such an arrangement, an amount of blown indoor air is not changed, a sucking volume of the indoor air is reduced and the surrounding air corresponding to the a difference volume between the suction air volume and the blown air volume is fed into an air passage and then a ventilation in which a preference is given to air suction can be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) This invention relates to an air conditioner with a ventilation function that can perform ventilation without impairing heating and cooling operations.

(Prior Art) Conventionally, there is an air conditioner with a ventilation function as shown in FIG.

To explain this air conditioner with ventilation function, it includes an indoor air side unit 1. Outdoor air side unit 2. A structure in which a compressor unit 3 and a compressor unit 3 are combined is used. Specifically, as shown in FIG. 5, the indoor air unit 1 generally has an inlet 4 (suction part) and an outlet 5 (outlet part) on the outside, and has an inlet 4 and an outlet inside. Exit 5
A unit main body 7 configured to have an air passage 6 communicating with the
An indoor heat exchanger 8 and an indoor air blower 9 are installed in the air passage 6 (corresponding to the main body of the air conditioner), and the suction side (upstream side ) has a structure in which a ventilation opening 10 is provided. Note that 11 is an opening/closing damper that opens and closes the ventilation port 10.

The indoor air unit 1 fixes the Uni-Soto main body 7 to the outer surface of the indoor wall 12, and connects the inlet 4 and outlet 5 to the air-conditioned space via the intake duct 13 and the air supply duct 14. It is installed in communication with the room 15. Note that this installation allows the ventilation port 10 to directly open to the outside.

The outdoor air side unit 2 is configured by providing an outdoor air heat exchanger 2] and an outdoor air blower 22 in the unit main body 20. Furthermore, the compressor unit 3 includes a compressor,
For example, a hermetic compressor 2 in which a compressor part and a motor part (none of which are shown) for driving the compressor part are provided in a hermetic case.
5. Constructed with a four-way valve 26.

The hermetic compressor 25 is connected to the four-way valve 26 through the refrigerant pipe 27. The indoor heat exchanger 8° pressure reducing device 28 and the outdoor heat exchanger 21 are connected in sequence to form a heat pump type refrigeration cycle 29 capable of air-conditioning operation. However, the pressure reducing device 28 is provided in the indoor air side unit 1 or the outdoor air side unit 2.

If the operation section (not shown) is operated for heating, the four-way valve 26 is switched to the heating side, and the hermetic compressor 25 is switched to the heating side.
And each blower started operating on 9.22. This creates a heating cycle and heats the room.

That is, the high-temperature, high-pressure gaseous refrigerant compressed by the hermetic compressor 25 passes through the four-way valve 26 and enters the indoor heat exchanger 8.
will be introduced in When this refrigerant passes through the indoor heat exchanger 8, the indoor air blower 9 causes the air intake duct 19 to pass through the indoor heat exchanger 8.
It exchanges heat with the indoor air that has flowed into the air duct 6 from the refrigerant, giving the indoor air the heat of the refrigerant. It is blown out into the room 15. On the other hand, the refrigerant in the indoor heat exchanger 8 is cooled and condensed (liquefied) by the above heat exchange.Then, this refrigerant is depressurized when passing through the pressure reducing device 28, and has a low temperature. It becomes a low-pressure liquid refrigerant. When this liquid refrigerant passes through the outdoor heat exchanger 21, it absorbs heat from the outside air (atmosphere) and evaporates (vaporizes), becoming a gaseous refrigerant.

Then, this gaseous refrigerant passes through the four-way valve 26, is sucked into the hermetic compressor 25 again, and is compressed, repeating the heating cycle to warm the room 15 to be heated.

During such heating operation, when ventilating the room, it is sufficient to open the ventilation port 10 of the indoor air unit 1.

That is, the ventilation opening 10 is opened by the operation of the indoor air blower 9.
Outside air (atmospheric air) is sucked in from the air passage 6 (because the upstream side of the air passage 6 becomes negative pressure). Then, this outside air is blown out into the room 15 through the indoor heat exchanger 8 and the air supply duct 14, as described above, while mixing with the indoor air sucked in from the suction duct 13. As a result, fresh outside air is introduced into the room 15, and as a result, the room 15 is ventilated.

In addition, during cooling, the four-way valve 26 only switches to the cooling side.
It has the same effect.

(Problems to be Solved by the Invention) Incidentally, an air conditioner with a ventilation function is required to perform cooling and heating while quickly exchanging indoor air with fresh outdoor air.

However, as in the above-mentioned conventional air conditioner with a ventilation mechanism, the suction force of the indoor air blower 9 on the downstream side of the air path is transferred to the ventilation port 10.
Although fresh air can be taken in through the ventilation opening 10, indoor air cannot be exhausted from the ventilation opening 10 due to the structure. In other words, regarding exhaust air, indoor 1
Only passive exhaustion of indoor air can be performed through the gap 5, and no consideration has been given to actively exhausting dirty indoor air through the ventilation opening 10.

Furthermore, the amount of air taken in, that is, the ventilation amount, is determined by the opening degree of the ventilation port 10, the air flowing in the intake duct 13, the air volume, or the performance of the indoor air blower 9, so there is a degree of freedom in adjusting the ventilation amount. There are few.

That is, in order to adjust the ventilation amount, the intake duct 13
It is necessary to adjust the opening degree of the ventilation port 10 while detecting the amount of air flowing through the air supply duct 14, detect the amount of air flowing inside the air supply duct 14, and judge whether the necessary intake amount has been secured based on the difference between these air amounts. Therefore, the amount of ventilation that can be adjusted considerably is restricted. Therefore, sufficient comfort cannot be obtained indoors.

This invention was made with attention to these circumstances,
The purpose of this is to provide ventilation with a function that allows fresh air to be taken in and dirty indoor air to be exhausted without impairing indoor air conditioning, and the amount of ventilation can be freely adjusted. Our goal is to provide a harmonizing machine.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, an air conditioner with a ventilation function of the present invention includes an air conditioner main body having a suction part and an outlet part communicating with a room. , an air passage provided in the air conditioner main body and communicating the suction part and the outlet part, an indoor heat exchanger provided in this air passage, and the air sandwiching the indoor heat exchanger. A pair of suction side blowers and a blowout side blower, which are provided on the suction side and the blowout side of the air passage, and which circulate indoor air into the air passage, and a pair of suction side blower and an outlet side blower, which are provided on the suction side of the air passage sandwiching the indoor heat exchanger, and which communicate with the outdoors. a normally closed ventilation port that communicates with the vent, an opening/closing means for opening the closed ventilation port during ventilation, a rotation speed variable means for varying the rotational speed of at least one of the suction side blower and the blowout side blower, and the suction side blower for ventilation. The present invention is provided with an adjusting means for adjusting the difference in rotational speed between the side blower and the outlet side blower.

(Function) According to the air conditioner with ventilation function of the present invention, during air conditioning (cooling/heating) operation, the ventilation port is opened and the air flow rate of the suction side blower is made smaller than the air flow rate of the outlet side blower by the adjustment means. By making a difference in rotational speed, fresh air (outside air) will flow into the air path through the ventilation openings by the amount of air obtained by the difference in air volume between the two blowers. This fresh air then exchanges heat with the indoor air flowing in from the suction part in the indoor heat exchanger, and is blown out into the room from the blow-off part.

However, fresh air is drawn into the room.

On the other hand, if the adjustment means is used to vary the rotational speed so that the air volume of the suction side blower is larger than the air volume of the outlet side blower, the amount of air obtained from the difference in air volume between the two blowers will be removed from the suction section. The dirty indoor air that has flowed into the room is exhausted outside through the ventilation openings.

Therefore, both fresh air can be taken in and dirty indoor air can be exhausted without impairing indoor air conditioning. Moreover, the intake air volume and exhaust volume (both ventilation volumes) can be freely adjusted from 0 to the maximum ventilation volume by simply changing the difference between the rotational speed of the suction side blower and the rotational speed of the outlet side blower. Therefore, there is a large degree of freedom in adjusting ventilation volume.

(Example) The present invention will be described below based on an example shown in FIGS. 1 to 3. However, since the parts in FIGS. 1 and 2 are the same as those described in the "Prior Art" section above, the same parts are given the same reference numerals and their explanations are omitted, and in this section, The different parts, that is, the main parts of the invention, will be explained.

This embodiment is different in that a plurality of blowers are used to enable ventilation on the suction side and the exhaust side.

That is, the ventilation port 10 of the indoor air side unit 1 is provided with an opening/closing damper 31 (opening/closing means) that is opened and closed by a solenoid 30, for example. The solenoid 30 used is one in which the opening/closing damper 31 is biased toward the closing side using an elastic member, and when excited, the opening/closing damper 31 is actuated toward the opening side. As a result, the damper 31 normally opens and closes the ventilation port 10.
It is blocked by

Further, in the air passage section 6a on the upstream side of the indoor air side unit 1 across the indoor heat exchanger 8, a suction side blower 32 constituted by, for example, a centrifugal blower is provided. and,
The suction part of this suction side blower 32 is connected to the suction port 4 of the unit main body 7, so that indoor air can flow into the air passage 6 through the suction side blower 32. Also, the air passage section 6b on the downstream side across the indoor heat exchanger 8 on the opposite side.
is provided with an outlet side blower 33 which is constructed of the same blower as the suction side blower 32 described above. The outlet of this blower 33 is connected to the outlet 5 of the unit main body 7, so that the air in the air passage 6 can be blown out into the room 15 through the outlet a133. . Note that each of the blowers 32 and 33 has a structure in which fans 32b and 33b are directly connected to fan motors 32a and 33a, each of which is composed of, for example, a transistor motor.

On the other hand, 35 is a control section composed of, for example, a microcomputer and its peripheral circuits. An operating section 37 is connected to this control section 35 . The operation unit 37 is also provided with a switch button 38 for switching between air conditioning and heating, a slide knob 39 for setting the air conditioning temperature, and a volume 40 (adjustment means) with a rotary switch that adjusts the ventilation amount. , it is possible to input operation signals necessary for ventilation.

The control section 35 includes an inverter circuit 25a1 connected to the motor section of the hermetic compressor 25, a four-way valve 26, a switching circuit 32C1 connected to the fan motor 32a of the suction side blower 32, and a fan motor 33a of the blowout side blower 33.
A switching circuit 3301 connected to the outdoor air blower 22 and a drive circuit 30a connected to the solenoid 30 are connected. The control unit 35 switches the four-way valve 26 according to the air conditioning switching signal input from the operation unit 37, and also uses the indoor temperature input from an indoor temperature sensor (not shown) and the set temperature set by the slide knob 39. The rotation speed of the hermetic compressor 25 is varied according to the difference (air conditioning load). In addition, the control unit 35 is configured to, depending on the indoor heat exchanger temperature input from an indoor heat exchanger sensor (not shown) (detects the temperature of the indoor heat exchanger 8),
A cooling/heating rotation speed variable means 36 for outputting a signal for varying the duty ratio to the switch circuits 32c and 33c is built-in, and includes a suction side blower 32 and an outlet side blower 3.
3 can be varied according to the temperature of the indoor heat exchanger 8 while maintaining the same rotation speed (same air volume). Note that this rotational speed variation is only performed during cooling and heating.

Further, the control unit 35 is configured to start ventilation operation in accordance with a signal from the volume 40.

That is, for example, the rotary volume 40 is at the intermediate position 4.
A rotary switch with 0a as the OFF position and other positions as the ON position is used. Note that the volume 40 has a region counterclockwise from the intermediate position 40a as a ventilation amount adjustment region 41a that prioritizes intake, and a region in the opposite clockwise direction as a ventilation amount adjustment region 41b that prioritizes exhaust. The control section 35 is configured to energize the solenoid 30 as an ON signal is input from the rotary switch of the volume 40. The control unit 35 has a built-in constant rotation means 41 that outputs a signal to the switching circuit 33c of the blower side blower 33 to maintain the current duty ratio when an ON signal is manually inputted from the volume 40. The switching circuit 3 is connected to the switching circuit 35 in accordance with the rotational displacement of the volume 40 of the operation unit 37.
A ventilation rotation speed variable means 42 (corresponding to the adjustment means together with the constant rotation means 41) for outputting a signal for varying the duty ratio is built into the ventilation rotation speed control device 2c.

When the ventilation rotation variable means 42 rotates the volume 40 counterclockwise, that is, to the ventilation amount adjustment region 41a that prioritizes intake air, the rotation speed of the fan motor 32a decreases from the rotation speed when the volume is turned on. It is supposed to be done. At the same time, when the volume 40 is turned clockwise, that is, to the ventilation amount adjustment area 41b that prioritizes exhaust air, the rotation speed of the fan motor 32a changes to the level where the volume is turned ON.
The rotation speed is set to increase from the hour. In other words, if the volume 40 is rotated from the intermediate position 40a to the left and right, the rotational speed (
The difference in rotational speed) can be adjusted continuously. Utilizing the difference in air volume at this time, it is possible to operate ventilation that prioritizes intake air (ventilation that primarily uses intake air) or ventilation that prioritizes exhaust air (ventilation that primarily uses exhaust air). .

Next, the operation of the air conditioner configured as described above will be explained.

For example, when performing heating, the switching button 35 of the operation section 37
to the heating side, and slide the slide knob 39 to set the set temperature.

As a result, the four-way valve 26 is switched to the heating side in accordance with the instruction signal from the control section 35, and the hermetic compressor 25 and each of the blowers 22, 32, and 33 start operating.

Then, the refrigerant is compressed by the hermetic compressor 25. Then, the compressed high temperature and high pressure gaseous refrigerant is transferred to the four-way valve 2.
6 and is introduced into the indoor heat exchanger 8. When this refrigerant passes through the indoor heat exchanger 8, the suction side blower 3
2, the refrigerant exchanges heat with the indoor air flowing into the air passage 6 from the intake duct 19, and imparts the heat amount of the refrigerant to the indoor air.

As a result, indoor air is heated and becomes warm air. Then, this warm air is sucked into the blower side blower 33 and blown out from the air duct 14 into the room 15.

On the other hand, the refrigerant in the indoor heat exchanger 8 is cooled and condensed (liquefied) by the above heat exchange. Then, this refrigerant is depressurized when passing through the pressure reducing device 28, and becomes a low-temperature, low-pressure liquid refrigerant. When this liquid refrigerant passes through the outdoor heat exchanger 21, it absorbs heat from the outside air (atmosphere) and evaporates (vaporizes).
It becomes a gaseous refrigerant. Then, this gaseous refrigerant passes through the four-way valve 26, is sucked in again from the hermetic compressor 25, and is compressed. By repeating this heating cycle,
The room 15 to be heated is heated.

During such heating operation, when performing ventilation, for example, ventilation with priority given to intake air, the volume 40 of the operation unit 37 should be moved to the intermediate position 40.
It rotates counterclockwise from a to the ventilation amount adjustment area 41a side by an amount corresponding to the desired ventilation amount. Then the volume is 40
The rotation switch is turned ON. The control unit 35 receives the ON signal from the rotary switch 40, excites the solenoid 30, and opens the ventilation port 10. In addition, the control unit 35 outputs a control signal to the constant rotation means 41 according to the human power of the ON signal, and keeps the rotation speed of the blower side blower 33 set at the indoor heat exchanger temperature constant at the rotation speed at the time when the volume 40 is operated. I'm going to do it. Specifically, as shown in FIG. 3, the blower side blower 33 constantly rotates at a rotation speed N1 in a medium rotation speed range.

At the same time, the ventilation rotation speed variable circuit 42 sends a volume 40 to the switching circuit 32c of the suction side blower 32.
A control signal is output to control the duty ratio according to the rotational displacement. Then, the rotation speed of the suction side blower 32 becomes the third
As shown in the figure, the rotation speed N2 is lower than the rotation speed N1.
decreases to.

As a result, the indoor air side unit 1 becomes the air blowing amount ffi Q + obtained by the blowing air volume or the rotation speed N, and the suction air volume becomes the air blowing amount Q2 (<Q
l). In other words, the amount of indoor air blown out remains unchanged.
The amount of indoor air sucked decreases to "Q2".

Then, outside air flows into the air path 6 from the ventilation opening 10 in an amount corresponding to the difference (Q, -02) between the intake air amount and the outlet air amount. As a result, mixed air of fresh outside air and indoor air is blown out into the room 15 via the indoor heat exchanger 8.

Here, the amount of air supplied is greater than the amount of air taken in, but the difference between them, that is, the amount of air (QI Q2), is exhausted to the outside through a gap in the room 15 or the like.

Therefore, ventilation can be performed with priority given to intake air.

Also, when performing ventilation that prioritizes exhaust air instead of giving priority to intake air,
The volume 40 of the operation unit 37 is rotated clockwise from the intermediate position 40a toward the ventilation amount adjustment area 41b by an amount corresponding to the desired ventilation amount. Then, as described above, the control unit 35 excites the solenoid 30 by turning on the rotation switch of the volume 40. At the same time, constant rotation means 4
1 to keep the rotational speed of the blower side blower 33 constant at the rotational speed ' at the time when the volume 40 was operated, for example, the same rotational speed N1 as described above.

In addition, from the ventilation rotation speed variable circuit 42, the suction side blower 32
A control signal for controlling the duty ratio according to the rotational displacement of the volume 40 is output to the switching circuit 32c. Then, the rotational speed of the suction side blower 32 increases from the rotational speed N1 to a higher rotational speed N3, as shown in FIG.

As a result, in the indoor air side unit 1, the blown air volume becomes the air blown amount Q1 obtained at the rotation speed N, and the intake air amount becomes the air blown amount Q3 (>Ql) obtained at the rotation speed N3 (>Nl). That is, the indoor air intake amount increases to "Q3" without changing the indoor air blowout amount, that is, the hot air blowout amount.

Then, since the increased amount of suction is not sent into the room 15, an amount of indoor air corresponding to the increased amount of suction (Q3 Ql) is exhausted from the ventilation port 10 to the atmosphere.

Here, check whether the intake air volume is greater than the air supply volume or the difference (Q3
Q.) Fresh air flows into the room 15 from outside.

Therefore, ventilation can be performed with priority given to exhaust air.

Note that such ventilation can be performed not only during heating but also during cooling.

Therefore, it is possible to perform ventilation by taking in fresh air and exhausting dirty indoor air without sacrificing heating, cooling, or air conditioning. Moreover, the ventilation amount can be easily adjusted from the ventilation amount "0" to the maximum ventilation amount by simply changing the difference in the rotational speed (rotational speed) between the suction side blower 32 and the outlet side blower 33. , it is possible to achieve high air quality in the room 15 (comfortable air-conditioned space).

In addition, since the ventilation amount is adjusted by the difference in rotation speed, there is no need for a device to adjust the opening of the ventilation openings as in the past.
The structure around the 10 ventilation holes has the advantage of being simple.

In one embodiment, the rotation speed of the blower side blower 33 is constant and the rotation speed of the suction side blower 32 is varied. The rotation speed of the blower side blower 33 may be variable.

Of course, the same effect as in the embodiment can be obtained by changing the rotational speeds of both the suction side blower 32 and the blowout side blower 33 to obtain the rotational speed difference necessary for intake and exhaust. In this case, the change in ventilation volume is expressed as "inhalation volume".
From "0" to the maximum airflow volume of the blower on the outlet side, the exhaust volume is "0".
” to the maximum air flow rate of the suction side blower.

In addition, in the above-mentioned embodiment, a volume with a rotary switch is used to adjust the ventilation amount by continuously changing the volume. Good too.

For example, selection buttons for "strong,""medium," and "weak" may be provided, and the ventilation amount may be set by operating the selection buttons.

[Effects of the Invention] As explained above, according to the present invention, ventilation can be performed by taking in fresh air and exhausting dirty indoor air without impairing indoor air conditioning.

Moreover, the ventilation amount can be determined simply by changing the difference between the rotational speed of the suction side blower and the rotational speed of the outlet side blower.
The amount of ventilation can be adjusted freely from the maximum amount to the maximum amount, and there is a great degree of freedom in adjusting the amount of ventilation.

[Brief explanation of drawings]

Figures 1 to 3 show one embodiment of the present invention.
The figure shows the configuration of an air conditioner with a ventilation function to which this invention is applied together with the control system, Figure 2 is a sectional view showing the indoor air side unit, and Figure 3 shows the performance of the suction side blower and the outlet side blower. 4 is a diagram showing a general air conditioner, and FIG. 5 is a sectional view showing a conventional indoor air side unit with a ventilation function. 7... Unit main body (air conditioner main body), 6... Air path, 8... Indoor heat exchanger, 10... Ventilation opening, 31
- Opening/closing damper (opening/closing means), 32... Suction side blower, 33... Outlet side blower, 32c, 33c... Switching circuit (rotation speed variable means) 35... Control section,
40... Rotary volume with rotation switch (adjustment means), 41... Constant rotation means (rotation speed variable means)

Claims (1)

[Claims] An air conditioner main body having a suction part and a blowout part communicating with a room; an air passage provided within the air conditioner body communicating the suction part and the blowout part; and an air conditioner provided within the air passage. an indoor heat exchanger, a pair of suction side blower and outlet side blower which are provided on the suction side and the blowout side of the air passage sandwiching the indoor heat exchanger and circulate indoor air through the air passage; A normally closed ventilation port provided on the suction side of the air passage sandwiching the inner heat exchanger and communicating with the outdoors, an opening/closing means for opening the ventilation port during ventilation, and at least one of the suction side blower and the blowout side blower. An air conditioner with a ventilation function, comprising: a rotation speed variable means for varying the rotation speed of the air conditioner; and an adjustment means for adjusting the difference in rotation speed between the suction side blower and the outlet side blower during ventilation.