KR20210114711A - Air conditioner unit - Google Patents

Abstract

An air conditioner unit is disclosed. According to the present invention, the air conditioner unit comprises: a refrigeration cycle in which a compressor, an outdoor-side heat exchanger, and an indoor-side heat exchanger are sequentially arranged to form a closed circuit; and a ventilation module disposed between the outdoor-side heat exchanger and the indoor-side heat exchanger, and including an auxiliary heat exchanger, an auxiliary blowing fan and a damper for opening and closing the suction side of the auxiliary blowing fan. In addition, the auxiliary heat exchanger of the ventilation module is connected in series with the outdoor-side heat exchanger and the indoor-side heat exchanger in the refrigeration cycle, and also connected in a parallel structure with the indoor-side heat exchanger for the compressor and the outdoor-side heat exchanger in the refrigeration cycle.

Description

Air conditioner {AIR CONDITIONER UNIT}

The present invention relates to an air conditioner, and more particularly, to an air conditioner having a ventilation module for ventilation.

In general, an air conditioner (also called an air conditioner) is provided with a refrigeration cycle device composed of a compressor, a condenser, a capillary tube, a heat exchanger, etc. It is a device that keeps the indoor atmosphere pleasant by sending it out.

The air conditioner can be divided into an integrated air conditioner and a separate air conditioner according to the installation method.

The integrated air conditioner includes a window type air conditioner or a packaged terminal air conditioner unit (PTAC), which is installed on a window by mounting all of the refrigeration cycle devices in one casing.

In contrast to this, the separate type air conditioner is divided into an indoor unit and an outdoor unit, and an indoor heat exchanger is installed in the indoor unit, and an outdoor heat exchanger and a compressor are installed in the outdoor unit, and are installed indoors and outdoors, respectively.

Among them, the integrated air conditioner includes a casing formed to have a predetermined internal space, an outdoor heat exchanger installed on one side of the casing to exchange heat with outdoor air, and an indoor side installed on the other side of the casing to exchange heat with indoor air. It includes a heat exchanger.

An outdoor air inlet and an outdoor air outlet are provided on the outdoor side of the casing, and an indoor air inlet and an indoor air outlet are provided on the indoor side of the casing.

The outdoor-side heat exchanger includes a compressor, an outdoor-side heat exchanger connected to the compressor through a refrigerant pipe, and an outdoor-side blowing fan located inside the outdoor-side heat exchanger to suck in outdoor air and discharge it toward the outdoor-side heat exchanger. do.

The indoor heat exchanger includes an indoor heat exchanger connected to the outdoor heat exchanger, and an indoor air blowing fan positioned inside the indoor heat exchanger to suck indoor air and discharge it toward the indoor heat exchanger.

The air conditioner having such a configuration is operated in an operation mode of a cooling operation or a heating operation. Recently, an air conditioner having a ventilation module for ventilation has been developed.

An air conditioner having a ventilation module is located between an outdoor heat exchanger and an indoor heat exchanger, and is provided with a vent and an axial fan in a bulkhead that divides the inside of the casing into the outdoor and indoor sides. ) and a filter are installed to selectively open and close the vent as needed, so that the air conditioner can be operated in three operation modes: cooling/heating alone operation, ventilation alone operation, and simultaneous operation.

Accordingly, a ventilation module for introducing outdoor air into the room may be installed in the partition wall, and the ventilation module may include a vent.

However, when outdoor air is supplied to the room without processing such as dehumidification, cooling/heating, etc., there is a problem in that the discomfort of users living in the room increases due to problems such as humidity and temperature difference.

In order to solve these problems, US Patent Publication No. US2017-0016635, Patent Publication No. US2017-0067655, Patent Publication No. US2017-0115014, Patent Publication No. US2017-0115015, Patent Publication No. US2017-0198934, US Patent Registration No. US10247429 and the like disclose an air conditioner and/or a control method of the air conditioner for enabling ventilation without causing discomfort to a user.

However, in the air conditioner and/or control method of the air conditioner disclosed in the above patents, the outside air is purified through an air cleaning filter and then supplied to the room, or the outside air is dehumidified/heated using a heater and then returned to the room. In most cases, it is the air supplied to the room after the dehumidification and cooling/heating treatment is completed, and it effectively reduces the discomfort felt by the user due to the outside air introduced into the room during ventilation (hereinafter referred to as "make up air"). cannot be reduced.

In addition, in some air conditioners, a ventilation module having an auxiliary refrigeration cycle (including one compressor and two heat exchangers (compressor, condenser)) for cooling/heating and dehumidifying the outside air is installed inside the casing of the air conditioner. In some cases, there is a problem in that the equipment cost of the air conditioner increases due to the ventilation module.

Accordingly, there is a demand for an air conditioner capable of effectively reducing a user's discomfort while suppressing an increase in equipment cost as much as possible.

US Patent Publication No. US2017-0016635 US Patent Publication No. US2017-0067655 US Patent Publication No. US2017-0115014 US Patent Publication No. US2017-0115015 US Patent Publication No. US2017-0198934 US Patent Registration No. US10247429

An object of the present invention is to provide an air conditioner capable of supplying optimal make up air to a user while minimizing an increase in equipment cost.

An air conditioner according to an embodiment of the present invention includes: a refrigeration cycle in which a compressor, an outdoor heat exchanger, and an indoor heat exchanger are sequentially arranged to form a closed circuit; and a ventilation module disposed between the outdoor-side heat exchanger and the indoor-side heat exchanger, the ventilation module including an auxiliary heat exchanger, an auxiliary blowing fan, and a damper opening and closing a suction side of the auxiliary blowing fan.

At this time, the auxiliary heat exchanger of the ventilation module is connected in series with the outdoor heat exchanger and the indoor heat exchanger in the refrigeration cycle, and in parallel with the indoor heat exchanger for the compressor and the outdoor heat exchanger in the refrigeration cycle. can also be connected.

The outdoor-side heat exchanger may be located on an outdoor side of the casing, and the outdoor-side heat exchanger including the outdoor-side heat exchanger may further include an outdoor-side blowing fan.

The indoor-side heat exchanger may be located on the indoor side of the casing, and the indoor-side heat exchanger including the indoor-side heat exchanger may further include an indoor-side blowing fan.

The ventilation module may further include a filter unit for purifying outside air, and the auxiliary blowing fan may be located on a partition wall dividing the inside of the casing into an outdoor side and an indoor side.

The filter unit and the auxiliary heat exchanger may be located on the suction side located on the outdoor side of the casing among the auxiliary blowing fans, or may be located on the discharge side located on the indoor side of the casing among the auxiliary blowing fans.

The air conditioner of the present embodiment selectively connects the compressor-side end of the first flow path connecting the outdoor-side heat exchanger and the compressor to the inlet or outlet of the compressor according to a mode selected from the cooling mode and the heating mode, and The compressor may further include a flow path switching valve selectively connecting the compressor-side end of the third flow path connecting the side heat exchanger and the compressor to an outlet or an inlet of the compressor.

An air conditioner according to another embodiment of the present invention includes: a casing; a compressor located inside the casing; a partition wall dividing the inside of the casing into an outdoor side and an indoor side; an outdoor heat exchanger located on the outdoor side of the casing and connected to the compressor through a first flow path; an indoor heat exchanger located on the indoor side inside the casing, connected to the outdoor heat exchanger through a second passage, and connected to the compressor through a third passage; and a ventilation module installed on the bulkhead and including a damper for opening and closing the auxiliary heat exchanger, the auxiliary blowing fan, and the suction side of the auxiliary blowing fan.

The inlet or outlet of the auxiliary heat exchanger is connected to the second flow path by a first branch flow path branched from the first branch point of the second flow path, and the outlet or inlet of the auxiliary heat exchanger is located on the indoor side of the first branch point and the second flow path. It is connected to the second flow path by a second branch flow path branched at the second branch point of the second flow path between the connection points of the heat exchanger, and the third flow path is connected to the second branch flow path by a third branch flow path branched from the third branch point. is connected, and outdoor air is selectively supplied to the room through the auxiliary heat exchanger according to the selected operation mode.

The auxiliary heat exchanger of the ventilation module is connected to the outdoor heat exchanger and the indoor heat exchanger in a series structure between the outdoor heat exchanger and the indoor heat exchanger, and the compressor and the outdoor side heat exchanger between the outdoor heat exchanger and the indoor heat exchanger. It can also be connected in parallel with the indoor heat exchanger for the heat exchanger.

Among the second flow paths, a first expansion valve may be positioned between the second branch point and a connection point of the indoor heat exchanger, and a second expansion valve may be positioned in the first branch flow channel, and between the third branch point and the indoor heat exchanger. A first on/off valve may be located in the third flow path of and a fourth opening/closing valve may be located in the second branch flow path.

The damper may open the suction side of the auxiliary blowing fan while the auxiliary blowing fan is operating, and may close the suction side of the auxiliary blowing fan while the auxiliary blowing fan is stopped.

The air conditioner having such a configuration may be operated in various operating modes such as a cooling mode, a heating mode, a ventilation mode, a cooling and ventilation mode, and a heating and ventilation mode.

For example, when the air conditioner is operated in the cooling mode or the heating mode, the outdoor side blowing fan and the indoor side blowing fan are operated, the auxiliary blowing fan is stopped, and the first expansion valve, the first opening/closing valve and the third opening/closing fan are operated. The valve is opened and the second expansion valve, the second opening valve and the fourth opening valve are closed.

As another example, when the air conditioner is operated in the ventilation mode, the outdoor-side blowing fan and the indoor-side blowing fan are stopped, the auxiliary blowing fan is operated, the second expansion valve and the second on-off valve are opened, and the first expansion The valve, the first on-off valve, the third on-off valve, and the fourth on-off valve are each closed.

The auxiliary heat exchanger is connected to the outdoor-side heat exchanger through a second flow path connected to the outdoor-side heat exchanger, and a first branch flow path connected to the second flow path at the first branch point, the second branch flow path, and the second branch flow path; It may be connected to the indoor heat exchanger through the second flow path connected at the second branch point, and may be connected to the outdoor heat exchanger and the indoor heat exchanger in a series structure.

When the auxiliary heat exchanger is connected in series and the air conditioner is simultaneously operated in either the cooling mode or the heating mode and in the ventilation mode, the indoor side blowing fan, the outdoor side blowing fan, and the auxiliary blowing fan are are operated, respectively, the first expansion valve, the second expansion valve, the first on-off valve, and the fourth on-off valve are opened, respectively, and the second on-off valve and the third on-off valve are respectively closed.

The auxiliary heat exchanger may be connected to the second flow path through the first branch flow path and to the third flow path through the third branch flow path, and may be connected to the indoor heat exchanger in parallel with respect to the compressor and the outdoor heat exchanger. .

When the auxiliary heat exchangers are connected in parallel and the air conditioner is operated in either the cooling mode or the heating mode and the ventilation mode at the same time, the indoor side blowing fan, the outdoor side blowing fan, and the auxiliary blowing fan are are operated, respectively, the first expansion valve, the second expansion valve, the first on-off valve, the second on-off valve, and the third on-off valve are each opened, and the fourth on-off valve is closed.

The air conditioner selectively connects the compressor-side end of a first flow path connecting the outdoor-side heat exchanger and the compressor to an inlet or outlet of the compressor according to a mode selected from a cooling mode and a heating mode, and the indoor heat exchanger The compressor may further include a flow path switching valve selectively connecting the compressor-side end of the third flow path connecting the exchanger and the compressor to an outlet or an inlet of the compressor.

The ventilation module may further include a filter unit for purifying the outside air, and the filter unit and the auxiliary heat exchanger are located on the suction side located on the outdoor side of the casing among the auxiliary blowing fans, or located on the indoor side of the casing among the auxiliary blowing fans It may be located on the discharge side.

In the air conditioner according to the present invention, a ventilation module having an auxiliary heat exchanger is installed on a partition wall separating an indoor side and an outdoor side of a casing.

Accordingly, the air bypassing the outdoor heat exchanger from the outdoor side flows into the ventilation module, and the air passes through the auxiliary heat exchanger to dehumidify and cool (or heat) it, and then flows into the room.

In the case of such a structure, there is no need for a separate compressor to form a refrigeration cycle for cooling (or heating) and dehumidifying the outside air, so the manufacturing cost of the air conditioner is reduced, the structure is simple, and the control logic is simplified. There is this.

The filter unit and the auxiliary heat exchanger provided in the ventilation module may be installed on the suction side or the discharge side of the auxiliary blowing fan.

When the filter unit and the auxiliary heat exchanger are installed on the suction side of the auxiliary blowing fan, external pollutants are purified and then supplied to the auxiliary blowing fan, thus preventing the auxiliary blowing fan from being contaminated, and the auxiliary heat exchanger is installed inside the casing. It is installed on the outdoor side of the unit, so it is advantageous to block inappropriate noise from entering the room.

On the other hand, when the filter unit and the auxiliary heat exchanger are installed on the discharge side of the auxiliary blowing fan, the filter unit is located on the indoor side of the casing, so that the user can easily replace the filter unit.

In addition, if the suction side of the auxiliary blowing fan is shielded by using a damper when ventilation is not performed, heat energy loss from the outside can be prevented.

In addition, when the air conditioner is simultaneously operated in the cooling mode and the ventilation mode, the air conditioner may be driven in any one connection structure selected from a series structure or a parallel structure if necessary.

For example, when dehumidification is important, a series structure that can maximize dehumidification performance can be used because overheating does not occur in the auxiliary heat exchanger. A parallel structure that can reduce the load may be used.

1 is a diagram schematically showing the configuration of an air conditioner according to an embodiment of the present invention.
2 is a view schematically showing the configuration of a ventilation module according to another embodiment of the present invention.
3 is a diagram illustrating a cycle configuration when the air conditioner according to an embodiment of the present invention is simultaneously operated in a cooling mode and a ventilation mode.
4 is a diagram illustrating a cycle configuration when the air conditioner according to an embodiment of the present invention is simultaneously operated in a heating mode and a ventilation mode.
5 is a table showing whether a blower fan, an expansion valve, and an on/off valve are operated according to an operation mode of the air conditioner according to an exemplary embodiment of the present invention.

Hereinafter, an embodiment disclosed in the present invention will be described in detail with reference to the accompanying drawings, but the same or similar components are assigned the same reference numerals regardless of reference numerals, and redundant description thereof will be omitted.

In the description of the embodiments disclosed in the present invention, when a component is referred to as “connected” or “connected” to another component, it may be directly connected or connected to the other component, but It should be understood that other components may exist in between.

In addition, in describing the embodiments disclosed in the present invention, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in the present invention, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in the present invention, and the technical spirit disclosed in the present invention is not limited by the accompanying drawings, and all changes included in the spirit and scope of the present invention , should be understood to include equivalents or substitutes.

On the other hand, the term "invention" can be replaced with terms such as discloser, document, specification, and description.

The greatest feature of the air conditioner according to the present invention is that one auxiliary heat exchanger is connected in series and parallel to a cycle composed of a compressor and two heat exchangers, and a series or parallel structure is selected as needed. to make up the outside air.

In this regard, the air conditioner according to the present invention includes: a refrigeration cycle in which a compressor, an outdoor heat exchanger, and an indoor heat exchanger are sequentially arranged to form a closed circuit; and a ventilation module disposed between the outdoor heat exchanger and the indoor heat exchanger, the ventilation module including an auxiliary heat exchanger, an auxiliary blowing fan, and a damper opening and closing a suction side of the auxiliary blowing fan, wherein the auxiliary heat exchanger of the ventilation module includes: It is characterized in that it is connected in series with the outdoor heat exchanger and the indoor heat exchanger in the refrigeration cycle, and is also connected in parallel with the indoor heat exchanger with respect to the compressor and the outdoor heat exchanger in the refrigeration cycle.

Hereinafter, an air conditioner according to an embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a diagram schematically showing the configuration of an air conditioner according to an embodiment of the present invention, and FIG. 2 is a diagram schematically showing the configuration of a ventilation module according to another embodiment of the present invention.

3 is a diagram illustrating a cycle configuration when the air conditioner according to an embodiment of the present invention is simultaneously operated in a cooling mode and a ventilation mode, and FIG. It is a view showing the cycle configuration when the mode and the ventilation mode are simultaneously operated. am.

As shown in FIG. 1 , the air conditioner according to an embodiment of the present invention includes a casing 10 .

A portion of the casing 10 is located on the outdoor side, and the remaining portion of the casing 10 is located on the indoor side.

And a partition wall 20 dividing the inside of the casing 10 into an indoor side and an outdoor side is installed inside the casing 10 .

In FIG. 1 , the left side of the partition wall 20 is the outdoor side, and the right side of the partition wall 20 is the indoor side.

A compressor 30 (refer to FIGS. 3 and 4 ) is located on the outdoor side of the inside of the casing 10 , and the compressor 30 is connected to the outdoor heat exchanger HE1 through the first flow path OP1.

The outdoor-side heat exchanger HE1 is located on the outdoor side of the inside of the casing 10 , and the outdoor-side blowing fan F1 is located adjacent to the outdoor-side heat exchanger HE1 .

The outdoor-side heat exchanger HE1 and the outdoor-side blowing fan F1 constitute an outdoor-side heat exchanger.

The outdoor heat exchanger HE1 is connected to the indoor heat exchanger HE2 through the second flow path OP2, and the indoor heat exchanger HE2 is connected to the compressor 30 through the third flow path OP3. .

The indoor heat exchanger HE2 is positioned on the indoor side inside the casing 10 , and the indoor-side blowing fan F2 is positioned between the partition wall 20 and the indoor heat exchanger HE2 .

Here, the indoor-side heat exchanger HE2 and the indoor-side blowing fan F2 constitute an indoor-side heat exchanger.

The partition wall 20 is provided with an auxiliary blowing fan F3 of the ventilation module 40 . The auxiliary blowing fan F3 may be configured as a static pressure centrifugal fan.

Since the static pressure centrifugal fan has a higher static pressure performance than the axial fan, it is possible to realize a large air volume while overcoming the static pressure loss of the filter.

Accordingly, the ventilation amount can be maximized compared to the conventional air conditioner having an axial fan.

The suction side of the auxiliary blowing fan F3 is located on the outdoor side inside the casing 10 , and the discharge side of the auxiliary blowing fan F3 is located on the indoor side inside the casing 10 .

The filter unit FT is located on the suction side of the auxiliary blowing fan F3, and the auxiliary heat exchanger HE3 is located between the filter unit FT and the auxiliary blowing fan F3, and at the lower part of the filter unit FT A damper DA for controlling that external air is supplied to the filter unit FT is positioned.

Accordingly, the damper DA may open and close the suction side of the auxiliary blowing fan F3.

The filter unit FT may include an air cleaning filter for removing fine dust or odor-causing substances and a HEPA filter.

Here, the auxiliary blowing fan F3, the auxiliary heat exchanger HE3, the filter unit FT, and the damper DA constitute the ventilation module 40 according to the embodiment of the present invention.

The inlet or outlet of the auxiliary heat exchanger HE3 is connected to the second flow path OP2 through the first branch flow path BOP1 branched from the first branch point P1 of the second flow path OP2, and the auxiliary heat exchanger ( The outlet or inlet of HE3) is a second flow path by a second branch flow path BOP2 branched at the second branch point P2 between the first branch point P1 and the connection point of the indoor heat exchanger of the second flow path OP2. It is connected to OP2 , and the third flow path OP3 is connected to the second branch flow path BOP2 through the third branch flow path BOP3 branched from the third branch point P3 .

Therefore, the auxiliary heat exchanger (HE3) of the ventilation module 40 is in series structure between the outdoor-side heat exchanger (HE1) and the indoor-side heat exchanger (HE2) to the outdoor-side heat exchanger (HE1) and the indoor-side heat exchanger (HE2). is connected to

That is, the auxiliary heat exchanger HE3 is connected in series with the outdoor heat exchanger HE1 through the second flow path OP2 and the first branch flow path BOP1, and the second branch flow path BOP2 and the second flow path (BOP1). OP2) in series with the indoor heat exchanger (HE2).

In addition, the auxiliary heat exchanger HE3 of the ventilation module 40 is an indoor side heat exchanger for the compressor 30 and the outdoor side heat exchanger HE1 between the outdoor side heat exchanger HE1 and the indoor side heat exchanger HE2. (HE2) is also connected in a parallel structure.

That is, the auxiliary heat exchanger HE3 is connected in parallel to the indoor heat exchanger HE2 through the first branch flow path OP1 , the second branch flow path OP2 , and the third branch flow path OP3 .

In FIG. 1 , the auxiliary heat exchanger HE3 , the filter unit FT, and the damper DA are illustrated as being located on the suction side of the auxiliary blowing fan F3 .

However, as shown in FIG. 2 , the auxiliary heat exchanger HE3 and the filter unit FT may be located on the discharge side of the auxiliary blowing fan F3 .

When the filter unit (FT) and the auxiliary heat exchanger (HE3) are installed on the suction side of the auxiliary blowing fan (F3), the auxiliary blowing fan (F3) is supplied to the auxiliary blowing fan (F3) after the external pollutants are purified. It is possible to prevent contamination by external contaminants, and since the auxiliary heat exchanger HE3 is installed on the outdoor side of the inside of the casing 10, it is advantageous to block inappropriate noise from being introduced into the room.

Contrary to this, when the filter unit FT and the auxiliary heat exchanger HE3 are installed on the discharge side of the auxiliary blowing fan F3, the filter unit FT is located on the indoor side inside the casing 10, so that the user It has the advantage of being easy to replace the part (FT).

In addition, if the suction side of the auxiliary blowing fan F3 is shielded using the damper DA when ventilation is not performed, heat energy loss from the outside can be prevented.

Although not shown, the filter unit FT and the damper DA may be located on the suction side of the auxiliary blowing fan F3 , and the auxiliary heat exchanger HE3 may be located on the discharge side of the auxiliary blowing fan F3 .

The first expansion valve EEV1 is positioned between the second branch point P2 of the second flow passage OP2 and the connection point of the indoor heat exchanger HE2, and the second expansion valve EEV2 is located in the first branch flow passage BOP1. is located

And the first on/off valve V1 is located in the third flow path OP3 between the third branch point P3 and the indoor heat exchanger HE2, and the second on/off valve V2 is located in the third branch flow path BOP3. The third on/off valve V3 is positioned in the second flow path OP2 between the first branch point P1 and the second branch point P2, and the fourth on/off valve V4 is positioned in the second branch flow path BOP2. is located

In the air conditioner of this embodiment, the compressor side end of the first flow path OP1 connecting the outdoor heat exchanger HE1 and the compressor 30 is connected to the compressor 30 according to a mode selected from the cooling mode and the heating mode. In addition to selectively connecting to an inlet or outlet of It further includes a flow path switching valve (50).

The flow path switching valve 50 may be configured as a 4-way valve.

When the air conditioner includes the flow path switching valve 50 , it is possible to operate in the cooling mode and the heating mode by switching the flow direction of the refrigerant.

Hereinafter, an operation mode of the air conditioner having the above configuration will be described with reference to FIGS. 3 to 5 .

In the table of FIG. 5, "O" stands for run and/or open, and "X" stands for stop and/or closed.

The air conditioner of the present invention may be operated in various modes such as a cooling mode, a heating mode, a ventilation mode, a cooling and ventilation mode, and a heating and ventilation mode.

And the opening and closing of the damper (DA) provided in the ventilation module 40 may be linked with the operation of the auxiliary blowing fan (F3).

That is, the damper DA opens the suction side of the auxiliary blowing fan F3 while the auxiliary blowing fan F3 is operating, and the suction side of the auxiliary blowing fan F3 while the auxiliary blowing fan F3 is stopped. closed, and the auxiliary blowing fan F3 is operated when the air conditioner is operated only in the ventilation mode or is operated in the cooling/heating mode together with the ventilation mode.

3 and 4, the state in which the damper DA closes the suction side of the auxiliary blowing fan F3 is shown by a dotted line, and the state in which the damper DA opens the suction side of the auxiliary blowing fan F3 is It is shown with a solid line.

As an example, when the air conditioner is simultaneously operated in one operation mode selected from the cooling mode or the heating mode and the ventilation mode, first, in a state in which the auxiliary heat exchanger (HE3) is connected in series, the indoor ventilation fan ( F2), the outdoor side blowing fan F1, and the auxiliary blowing fan F3 are operated, respectively, the first expansion valve EEV1, the second expansion valve EEV2, the first on-off valve V1, and the fourth The on-off valve V4 is opened, respectively, and the second on-off valve V2 and the third on-off valve V3 are closed, respectively.

And when the auxiliary heat exchanger (HE3) is connected in a parallel structure, the indoor side blowing fan (F2), the outdoor side blowing fan (F1), and the auxiliary blowing fan (F3) are each operated, and the first expansion valve (EEV1), The second expansion valve EEV2 , the first on-off valve V1 , the second on-off valve V2 , and the third on-off valve V3 are opened, respectively, and the fourth on-off valve V4 is closed.

A cycle when the air conditioner is simultaneously operated in the cooling mode and the ventilation mode is shown in FIG. 3 , and a cycle when the air conditioner is simultaneously operated in the heating mode and the ventilation mode is shown in FIG. 4 .

When the case in which the air conditioner is operated in the cooling mode and the ventilation mode in a state in which the auxiliary heat exchanger HE3 is connected in a parallel structure will be described with reference to FIG. 3 , the refrigerant compressed in the compressor 30 flows through the first flow path OP1 ) through the outdoor heat exchanger (HE1).

And most of the refrigerant discharged from the outdoor heat exchanger (HE1) flows along the second flow path (OP2), passes through the third on-off valve (V3) and the first expansion valve (EEV1), and then passes through the indoor heat exchanger (HE2) The refrigerant supplied to and discharged from the indoor heat exchanger HE2 flows along the third flow path OP3 and passes through the first opening/closing valve V1 and then is recovered by the compressor 30 .

Then, the remaining portion of the refrigerant discharged from the outdoor heat exchanger HE1 flows along the first branch flow path BOP1 branched from the first branch point P1 and passes through the second expansion valve EEV2, and then the auxiliary heat exchanger (HE3) is supplied.

And, since the fourth on-off valve V4 is closed, the refrigerant discharged from the auxiliary heat exchanger HE3 flows along the second branch flow path BOP3, and then branches off at the third branch point P3. BOP3), and then joins with the refrigerant flowing through the third flow path OP3 after passing through the second opening/closing valve V2 at the third branch point P3.

During this operation, the outdoor air introduced through the filter unit FT is cooled and dehumidified while passing through the auxiliary heat exchanger HE3, and then blown into the room.

Next, referring to FIG. 3 for a case in which the air conditioner is operated in the cooling mode and the ventilation mode while the auxiliary heat exchanger HE3 is connected in series, the refrigerant compressed in the compressor 30 is the first It is supplied to the outdoor heat exchanger HE1 through the flow path OP1.

And the refrigerant discharged from the outdoor heat exchanger HE1 flows along the second flow path OP2, flows into the first branch flow path BOP1 branched at the second branch point P2, and flows along the first branch flow path BOP1. After passing through the second expansion valve (EEV2) installed in the auxiliary heat exchanger (HE3) is supplied.

At this time, since the third on-off valve V3 is blocked, the flow of the refrigerant through the second flow path OP2 between the first branch point P1 and the second branch point P2 is limited.

And the refrigerant discharged from the auxiliary heat exchanger (HE3) flows along the second branch flow path (BOP2), passes through the fourth on-off valve (V4), and then flows into the second flow path (OP2) at the second branch point (P2), Thereafter, it is supplied to the indoor heat exchanger HE2 after passing through the first expansion valve EEV1 .

At this time, since the second opening/closing valve V2 is blocked, the flow of the refrigerant through the third branch flow path BOP3 is limited.

In addition, the refrigerant discharged from the indoor heat exchanger HE2 flows along the third flow path OP3 , passes through the first on/off valve V1 , and then is recovered by the compressor 30 .

During this operation, the outdoor air introduced through the filter unit FT is cooled and dehumidified while passing through the auxiliary heat exchanger HE3, and then blown into the room.

Hereinafter, a case in which the air conditioner is operated in the heating mode and the ventilation mode while the auxiliary heat exchanger HE3 is connected in a parallel structure will be described with reference to FIG. 4 .

Most of the refrigerant compressed in the compressor 30 is supplied to the indoor heat exchanger HE2 through the third flow path OP3, and the refrigerant discharged from the indoor heat exchanger HE2 flows along the second flow path OP2. As it flows, it passes through the first expansion valve (EEV1) and the third on-off valve (V3) and then is supplied to the outdoor heat exchanger (HE1), and the refrigerant discharged from the outdoor heat exchanger (HE1) passes through the first flow path (OP1). through the compressor 30 .

At this time, since the fourth opening/closing valve V4 is blocked, the flow of the refrigerant through the second branch flow path BOP2 is limited.

And the remaining portion of the refrigerant compressed in the compressor 30 flows along the third branch flow path BOP3 branched at the third branch point P3, passes through the second on/off valve V2, and then in the auxiliary heat exchanger HE3. The refrigerant supplied and discharged from the auxiliary heat exchanger HE3 flows along the first branch flow path BOP1 and passes through the second expansion valve EEV2, and then flows along the second flow path OP2 and the first branch point After joining at (P1), it is supplied to the outdoor side heat exchanger (HE1).

During this operation, the outdoor air introduced through the filter unit FT is heated and dehumidified while passing through the auxiliary heat exchanger HE3 and blown into the room.

Next, a case in which the air conditioner is operated in the heating mode and the ventilation mode while the auxiliary heat exchanger HE3 is connected in series will be described with reference to FIG. 4 , the refrigerant compressed in the compressor 30 is the third As it flows along the flow path OP3, it passes through the first on/off valve V1, is supplied to the indoor heat exchanger HE2, and the refrigerant discharged from the indoor heat exchanger HE2 flows along the second flow path OP2. After passing through the first expansion valve EEV1, it flows into the second branch flow path BOP2 branched at the second branch point P2, and then passes through the fourth on-off valve V4 and then the auxiliary heat exchanger HE3 ) is supplied to

At this time, since the third on-off valve V3 is blocked, the flow of the refrigerant through the second flow path OP2 between the first branch point P1 and the second branch point P2 is limited.

And the refrigerant discharged from the auxiliary heat exchanger HE3 flows along the first branch flow path BOP1 and passes through the second expansion valve EEV2, and then flows into the second flow path OP2 at the first branch point P1 and , is then supplied to the outdoor heat exchanger HE1 and then recovered to the compressor 30 through the first flow path OP1.

At this time, since the second opening/closing valve V2 is blocked, the flow of the refrigerant through the third branch flow path BOP3 is limited.

During this operation, the outdoor air introduced through the filter unit FT is heated and dehumidified while passing through the auxiliary heat exchanger HE3 and blown into the room.

In addition, the flow path switching valve 50 switches the flow path so that the refrigerant flow described above is achieved in the cooling mode and the heating mode, respectively.

Next, a case in which the air conditioner operates only in the cooling/heating mode will be described with reference to FIGS. 3 and 4 .

When the air conditioner operates only in cooling/heating mode, it is desirable to operate with the auxiliary heat exchanger (HE3) connected in series, because the outdoor heat exchanger (HE1) (when operating in cooling mode) ) or the refrigerant supplied to the auxiliary heat exchanger (HE3) among the refrigerants discharged from the indoor heat exchanger (HE2) (when operating in the heating mode) cannot be used for indoor cooling/heating.

Therefore, when the auxiliary heat exchanger (HE3) is operated in the cooling mode in a state in which the auxiliary heat exchanger (HE3) is connected in series, the auxiliary blowing fan (F3) is stopped, and the suction side of the auxiliary blowing fan (F3) is indicated by a dotted line in FIGS. 3 and 4, respectively. As shown, it is closed by the damper DA.

And the outdoor-side blowing fan F1 and the indoor-side blowing fan F2 are operated, the second expansion valve EEV2, the second on-off valve V2, and the fourth on-off valve V4 are shielded, and the first expansion valve The valve EEV1, the first on-off valve V1, and the third on-off valve V3 are opened.

According to this, cooling/heating air is supplied to the room, but the make up air is not supplied to the room.

Next, when the air conditioner is operated only in ventilation mode, it is preferable to operate using only the auxiliary heat exchanger (HE3) without using the indoor heat exchanger (HE2), because the indoor heat exchanger (HE2) This is because the load of the compressor 30 can be reduced compared to the case of using it together with the auxiliary heat exchanger HE3.

Accordingly, when the air conditioner is operated only in the ventilation mode, the auxiliary blowing fan F3 is operated, the outdoor side blowing fan F1 and the indoor side blowing fan F2 are stopped, and the second expansion valve EEV2 and The second on-off valve V2 is opened, and the first expansion valve EEV1 , the first on-off valve V1 , the third on-off valve V3 , and the fourth on-off valve V4 are closed, respectively. In this case, the compressor 30 may be operated at a low frequency.

In the above description, a case in which the ventilation mode is set by the user has been described as an example, but the ventilation module may be intermittently driven using various air quality sensors that detect _{CO 2 , odor, fine dust, and the like.}

For example, ventilation only mode does not work while the air conditioner is operating in cooling/heating mode, and intermittently automatically and intermittently based on data detected by the air quality sensor while the air conditioner is not operating in cooling/heating mode can work

The above detailed description should not be construed as restrictive in all respects and should be considered as illustrative. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention.

10: casing 20: bulkhead
30: compressor 40: ventilation module
50: flow changeover valves HE1 to HE3: heat exchanger
F1 to F3: Blowing fan OP1 to OP3: Flow path
BOP1 to BOP3: branch flow path FT: filter unit
DA: dampers EEV1 to EEV2: expansion valve
V1 to V4: on-off valve

Claims (20)

a refrigeration cycle in which a compressor, an outdoor-side heat exchanger, and an indoor-side heat exchanger are sequentially arranged to form a closed circuit; and
A ventilation module disposed between the outdoor heat exchanger and the indoor heat exchanger, the ventilation module including an auxiliary heat exchanger, an auxiliary blowing fan, and a damper for opening and closing a suction side of the auxiliary blowing fan
including,
The auxiliary heat exchanger of the ventilation module is connected in series with the outdoor-side heat exchanger and the indoor-side heat exchanger in the refrigeration cycle, and is connected to the indoor heat exchanger with respect to the compressor and the outdoor-side heat exchanger in the refrigeration cycle. An air conditioner that is also connected in parallel with the side heat exchanger. In claim 1,
The outdoor-side heat exchanger is located on an outdoor side of the casing, and the outdoor-side heat exchanger including the outdoor-side heat exchanger further includes an outdoor-side blowing fan. In claim 2,
The indoor heat exchanger is located on the indoor side of the casing, and the indoor heat exchanger including the indoor heat exchanger further includes an indoor air blowing fan. In claim 3,
The ventilation module further includes a filter unit for purifying external air, and the auxiliary blowing fan is located in a partition wall dividing the inside of the casing into an outdoor side and an indoor side. In claim 4,
The filter unit and the auxiliary heat exchanger are located on the suction side of the auxiliary blowing fan located on the outdoor side of the casing. In claim 4,
The filter unit and the auxiliary heat exchanger are located on a discharge side of the auxiliary blowing fan located on the indoor side of the casing. 7. In any one of claims 1 to 6,
According to a mode selected from the cooling mode and the heating mode, the compressor side end of the first flow path connecting the outdoor heat exchanger and the compressor is selectively connected to an inlet or outlet of the compressor, and the indoor heat exchanger and and a flow path switching valve selectively connecting the compressor-side end of a third flow path connecting the compressor to an outlet or an inlet of the compressor. casing;
a compressor located inside the casing;
a partition wall dividing the inside of the casing into an outdoor side and an indoor side;
an outdoor-side heat exchanger located outside the casing and connected to the compressor through a first flow path;
an indoor heat exchanger located indoors in the casing, connected to the outdoor heat exchanger through a second passage, and connected to the compressor through a third passage; and
Ventilation module installed on the bulkhead and including a damper for opening and closing an auxiliary heat exchanger, an auxiliary blowing fan, and a suction side of the auxiliary blowing fan
including,
The inlet or outlet of the auxiliary heat exchanger is connected to the second flow path by a first branch flow path branched from the first branch point of the second flow path, and the outlet or inlet of the auxiliary heat exchanger is connected to the first branch point and the second flow path. It is connected to the second flow path by a second branch flow path branched from the second branch point of the second flow path between the connection points of the indoor heat exchanger of the second flow path,
The third flow path is connected to the second branch flow path by a third branch flow path branched from a third branch point,
An air conditioner in which outdoor air is selectively supplied to a room through the auxiliary heat exchanger according to a selected operation mode. In claim 8,
The auxiliary heat exchanger of the ventilation module is connected to the outdoor-side heat exchanger and the indoor-side heat exchanger in a series structure between the outdoor-side heat exchanger and the indoor-side heat exchanger, and the outdoor-side heat exchanger and the indoor-side heat exchanger An air conditioner that is also connected between the heat exchangers in parallel with the indoor heat exchanger for the compressor and the outdoor heat exchanger. In claim 9,
In the second flow path, a first expansion valve is positioned between the second branch point and a connection point of the indoor heat exchanger, a second expansion valve is positioned in the first branch flow channel, and the third branch point and the indoor heat exchanger A first opening/closing valve is located in a third flow path between An air conditioner in which a fourth on-off valve is located in the second branch flow path. In claim 10,
The damper opens the suction side of the auxiliary blowing fan while the auxiliary blowing fan is operating, and closes the suction side of the auxiliary blowing fan while the auxiliary blowing fan is stopped. In claim 11,
When operating in the cooling mode or heating mode, the outdoor-side blowing fan and the indoor-side blowing fan are operated, the auxiliary blowing fan is stopped, and the first expansion valve, the first on-off valve, and the third on-off valve are an air conditioner in which the second expansion valve, the second open valve, and the fourth open valve are closed. In claim 11,
When operating in the ventilation mode, the outdoor-side blowing fan and the indoor-side blowing fan are stopped, the auxiliary blowing fan is operated, the second expansion valve and the second opening/closing valve are opened, the first expansion valve; The first on-off valve, the third on-off valve, and the fourth on-off valve are each shielded. In claim 11,
The auxiliary heat exchanger is
connected to the outdoor heat exchanger through a second flow path connected to the outdoor heat exchanger, and the first branch flow path connected to the second flow path at the first branch point;
connected to the indoor heat exchanger through the second branch flow path, and the second flow path connected to the second branch flow path and the second branch point;
An air conditioner connected to the outdoor-side heat exchanger and the indoor-side heat exchanger in the series structure. 15. In claim 14,
When any one operation mode selected from a cooling mode or a heating mode and a ventilation mode are simultaneously operated while the auxiliary heat exchangers are connected in the series structure, the indoor side blowing fan, the outdoor side blowing fan, and the auxiliary blowing fan are an air conditioner in which each of the first expansion valve, the second expansion valve, the first on-off valve, and the fourth on-off valve is opened, and the second on-off valve and the third on-off valve are respectively closed Device. In claim 11,
The auxiliary heat exchanger is
It is connected to the second flow path through the first branch flow path, and is connected to the third flow path through the third branch flow path,
An air conditioner connected to the indoor heat exchanger in the parallel structure with respect to the compressor and the outdoor heat exchanger. 17. In claim 16,
In a state in which the auxiliary heat exchanger is connected in the parallel structure, when any one operation mode selected from a cooling mode or a heating mode and a ventilation mode are simultaneously operated, the indoor side blowing fan, the outdoor side blowing fan, and the auxiliary blowing fan are an air conditioner in which each of the first expansion valve, the second expansion valve, the first on-off valve, the second on-off valve, and the third on-off valve is opened, and the fourth on-off valve is closed . 18. In any one of claims 8 to 17,
According to a mode selected from the cooling mode and the heating mode, the compressor side end of the first flow path connecting the outdoor heat exchanger and the compressor is selectively connected to an inlet or outlet of the compressor, and the indoor heat exchanger and and a flow path switching valve selectively connecting the compressor-side end of a third flow path connecting the compressor to an outlet or an inlet of the compressor. In claim 18,
The ventilation module further includes a filter for purifying external air. In paragraph 19,
The filter unit and the auxiliary heat exchanger are located on the suction side of the auxiliary blowing fan located on the outdoor side of the casing, or located on the discharge side of the auxiliary blowing fan located on the indoor side of the casing.

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