WO2023017581A1

WO2023017581A1 - Outside air conditioner, outside air conditioning system, and method for operating outside air conditioning system

Info

Publication number: WO2023017581A1
Application number: PCT/JP2021/029632
Authority: WO
Inventors: 尊宣村上
Original assignee: 株式会社エコファクトリー
Priority date: 2021-08-11
Filing date: 2021-08-11
Publication date: 2023-02-16

Abstract

[Problem] To provide an outside air conditioner, an outside air conditioning system, and a method for operating the outside air conditioning system which can promote indoor ventilation and achieve energy conservation by reducing the operating load of a heat source device. [Solution] An outside air conditioner 2 is installed in a room of a building and is provided with: a heat exchanger 22 connected to a heat medium circuit 33 of an air conditioner 3; an air supply filter 23; and, an air supply fan 24. When the air supply fan 24 is driven, an air flow is generated in an enclosure 21 from an introduction port 211 to an air supply port 214, and outside air A introduced from the introduction port 211 is guided by the air flow and cooled or warmed to a prescribed level by the heat exchanger 22 and then supplied from the air supply port 214 to the room, allowing air in the room to be ventilated in a short time.

Description

Outside air conditioner, outside air conditioning system, and method of operating outside air conditioning system

The present invention relates to an outside air conditioner, an outside air conditioning system, and a method of operating the outside air conditioning system. More specifically, the present invention relates to an outdoor air conditioner, an outdoor air conditioning system, and an operating method of the outdoor air conditioning system that can promote indoor ventilation and reduce the operating load of a heat source device to achieve energy saving.

As houses become more airtight and highly insulated, the carbon dioxide concentration increases without adequate ventilation, and especially in new houses, the concentration of formaldehyde and volatile organic compounds (VOC: Vapor Organic Composition) becomes too high. There is Also, inadequate ventilation can lead to high humidity and mold and dust mites, which can lead to allergies. In addition, as a measure to prevent infectious diseases such as the new coronavirus, it is recommended to introduce outside air into the room regularly and avoid closed spaces with poor ventilation as much as possible.

In order to deal with air pollution in such closed spaces, in recent years, so-called 24-hour ventilation systems, which continuously ventilate a fixed amount of air for 24 hours throughout the entire house, have been increasingly adopted.

By adopting this 24-hour ventilation system, it is possible to create a flow of air from the living space (living room, bedroom, etc.) to the non-living space (toilet, dressing room, etc.) in the house, and to replace the air in the room. It is possible to reduce the influence of polluted air on the human body as much as possible. In this 24-hour ventilation system, it is essential to have air supply holes for communication between the room and the outside, which are formed in the walls of the building. properly attached.

The air supply register is equipped with a shutter plate that can be opened and closed by the operation part, and by operating the operation part, the opening and closing degree of the shutter plate can be changed, and the air supply flow rate of the air flowing into the room from the air supply hole can be varied. It is adjustable. Therefore, for example, when using an air supply register (during ventilation), the opening of the shutter plate is fully opened to increase the amount of air supply to promote ventilation, and in bad weather such as a typhoon, the opening of the shutter plate is reduced, or Adjustments such as fully closing and limiting the amount of air supplied to the room are possible.

On the other hand, if the filter attached to the air supply register is not cleaned or replaced and clogged, even if the shutter plate is fully opened, the original amount of air supply cannot be secured. Therefore, there is a problem that the ventilation in the room is not promoted because the ventilation is not promoted and the air supply amount as planned cannot be secured.

In addition, when performing ventilation with an air supply register, since the outside air flows into the room through the air supply hole as it is, for example, in the summer, the temperature inside the room cannot be avoided. , the operating load of the air conditioner at the time of start-up becomes large.

Therefore, Patent Document 1, for example, discloses an outside air conditioner that has a heat exchanger inside a housing that is installed on the outer wall surface of a building and that is interlocked with the operation of the air conditioner. According to the outdoor air conditioner disclosed in Patent Document 1, the heat exchanger circulates the refrigerant supplied from the outdoor unit installed outdoors through the refrigerant pipe, and performs heat exchange with the outside air. It has become.

Since the outside air cooled (or heated) by the heat exchanger of the outside air conditioner is introduced into the room through the communication holes formed in the wall surface, the temperature rise in the room ( or temperature drop) can be suppressed. Therefore, it is possible to reduce the operating load at the start of operation of the air conditioner, and to realize energy saving.

Japanese Patent No. 6407466

By the way, the outdoor air conditioner disclosed in Patent Document 1 is assumed to be installed outdoors, for example, on the outer wall of a typical house or on the outer wall facing the veranda of an apartment complex. For this reason, there is a problem that it is difficult to install it especially in high-rise apartment buildings or office buildings without balconies. Therefore, it has been desired to develop an outdoor air conditioner that can be easily installed in the room of a building and has excellent ventilation performance.

The present invention has been invented in view of the above points, and provides an outdoor air conditioner, an outdoor air conditioning system, and an outdoor air conditioner that can promote indoor ventilation and reduce the operating load of a heat source device to achieve energy saving. It is an object of the present invention to provide a method of operating an outside air conditioning system.

In order to achieve the above object, the outdoor air conditioner of the present invention is an outdoor air conditioner installed indoors in a building, comprising an inlet for introducing outdoor air, and supplying the outdoor air introduced from the inlet into the room. an air supply chamber having an air supply port formed thereon, a housing having an outside air introduction path leading from the introduction port to the air supply chamber, and a heat medium circuit of a heat source device outside the machine, and the outside air introduction A heat exchanger arranged on a road to cool or heat the outside air introduced from the inlet, an air supply fan arranged in the air supply chamber and generating an airflow from the inlet to the air supply port, A supply air filter is provided on the outside air introduction passage and downstream of the heat exchanger for purifying the outside air introduced from the introduction port.

Here, since the outside air conditioner is installed inside the building, it can be installed inside the building even if it is difficult to install it on the outer wall of the building, such as in an upper floor of an apartment building without a veranda or the like, or in an office building. Therefore, it is possible to increase the degree of freedom in installation.

Also, an air supply chamber formed with an inlet for introducing outside air, an air supply port for supplying the outside air introduced from the inlet into the room, and a housing formed with an outside air introduction path leading from the inlet to the air supply chamber By providing the above, the outside air can be introduced from the introduction port, and the introduced outside air can be supplied into the room through the outside air introduction passage.

In addition, by providing a heat exchanger that is incorporated in the heat medium circuit of the heat source device outside the machine and arranged on the outside air introduction path to cool or heat the outside air introduced from the introduction port, the air conditioner as the heat source device By incorporating a heat exchanger in the heat medium circuit of the cooling water circulator (including refrigerants such as CFC gas and alternative gases, hot water or cold water, gas for heating or cooling, etc.), the air after heat exchange can be transferred to the room. Air can be supplied to the

The heat exchanger incorporated in the heat medium circuit of the heat source device outside the machine lowers the indoor temperature to the target temperature in a short time, for example, when performing cooling operation using an air conditioner as the heat source device. Therefore, the operating load of the air conditioner can be reduced.

In addition, for example, by using a fin-tube type heat exchanger that is compact and lightweight and has good heat exchange efficiency, it is possible to reduce the size and weight of the entire outdoor air conditioner while securing the installation space for the heat exchanger in the housing. Therefore, the installation area of the outdoor air conditioner in the room of the building can be minimized.

In addition, by providing an air supply fan that is arranged in the air supply chamber and generates an air flow from the inlet to the air supply port, the outside air introduced from the inlet is efficiently guided to the air supply port, and a constant supply of air is provided. By securing the air volume, it is possible to promote indoor ventilation.

In addition, by providing an air supply filter that is arranged on the outside air introduction passage and downstream of the heat exchanger and purifies the outside air introduced from the introduction port, PM2.5, pollen, or virus components contained in the outside air are removed. (hereinafter referred to as "pollutants, etc.") can be removed, and fresh outside air can always be supplied to the room.

In addition, the crossing angle between the direction of outside air introduced from the introduction port and the axial direction of the outside air introduction passage is approximately 90 degrees. Various devices can be installed in the spatial space.

In addition, the outside air introduction path is partitioned into a first partitioned chamber on the upstream side and a second partitioned chamber on the downstream side, and an opening that communicates the first partitioned chamber and the second partitioned chamber at a predetermined position. It has a partition plate with holes formed therein, the heat exchanger is arranged in the first compartment, and the main body portion composed of the fins of the heat exchanger and the heat transfer tubes connected to the fins corresponds to the opening holes. If it is fixed to the partition plate, the entire amount of outside air introduced from the inlet can pass through the heat exchanger and flow into the second compartment.

Furthermore, the outside air introduced from the inlet can change the flow direction by colliding with the partition plate, so that turbulence can be generated in the first compartment. The turbulent state of outside air increases the chances of contact with the heat exchanger arranged in the first compartment, thereby promoting heat exchange and increasing the efficiency of heat exchange.

In addition, when the heat exchanger is installed at an inclination angle of approximately 45 to 75 degrees with respect to the axial direction of the outside air introduction passage, the heat exchanger can be installed in a limited space. Therefore, it is possible to prevent an increase in the size of the housing that accommodates the heat exchanger. Furthermore, during cooling operation of the air conditioner, the condensed water adhering to the heat exchanger can be smoothly drained vertically downward according to the inclination of the fins of the heat exchanger. Therefore, it is possible to prevent the flow of air from becoming stagnant due to the stagnation caused by the surface tension of the condensed water or water droplets narrowing the air circulation portion of the heat exchanger.

In addition, if the air supply port has a wind direction plate that partitions into a plurality of flow paths that allow the outside air that has passed through the outside air introduction passage to be supplied into the room, the direction of the outside air supplied from the air supply port It is possible to uniformly supply the outside air to the entire room by improving the efficiency.

In addition, if the inlet has an inlet filter that has at least one of the functions of insect repellent, dust removal, deodorization, and antibacterial, it removes contaminants contained in the outside air introduced from the inlet, and fresh Air can be introduced into the outside air introduction passage.

Further, in the case where there is a drain portion between the inlet and the heat exchanger for discharging the condensed water that drips from the heat exchanger to the outside of the machine, for example, during the cooling operation of the air conditioner connected to the outside air conditioner, Since the condensed water generated from the heat exchanger can be received by the drain portion and discharged to the outside of the apparatus, it is possible to prevent corrosion due to the condensed water remaining inside the housing.

The drain section includes a water receiving section for receiving the condensed water dripping from the heat exchanger, a trap section for storing the condensed water dripped into the water receiving section, and a drainage channel for guiding the condensed water from the water receiving section to the trap section. , the condensed water that drips from the heat exchanger is first received by the water receiving portion, and is stored in the trap portion through the drainage channel. Since the condensed water stored in the trap portion can be discharged to the outside of the machine as it is, the condensed water can be reliably discharged to the outside of the machine.

In addition, if the chassis is set up on a stainless steel base installed on the installation surface, there is no need to adjust the horizontal or vertical position of the chassis with respect to the installation surface. Installation work on the installation surface becomes easy. In addition, since the horizontal and vertical positions of the housing can be maintained, for example, the air supply fan installed inside the housing can be properly driven, and the condensed water from the heat exchanger can be directed vertically downward. can be discharged. Furthermore, since the base is made of a stainless steel material, the surface of the base is prevented from getting dirty and is less likely to be scratched, resulting in a good appearance.

In addition, when one side of the housing has a door for opening and closing the opening, opening and closing the door allows easy access to the internal equipment of the outdoor air conditioner. It becomes possible to improve maintainability. Neglecting to maintain the internal equipment (air supply fan, air supply filter, heat exchanger, etc.) of the outside air conditioner may cause clogging of the air supply filter, staining of the housing, and generation of mold. Therefore, by performing regular maintenance, it is possible to stably drive the outdoor air conditioner for a long period of time and to constantly supply fresh air to the room.

In addition, if the air supply fan is configured such that the sirocco fan, the wind tunnel surrounding the sirocco fan, and the casing can be separated, the sirocco fan, which needs to be replaced periodically, can be easily replaced. .

In order to achieve the above object, the outdoor air conditioning system of the present invention includes a heat source device having a heat medium circuit in which a refrigerant circulates, and a heat source device installed in a room of a building to introduce outside air into the room through an inlet for introducing outside air. A housing in which an outside air introduction path leading to an air supply port for supplying air is formed, a heat exchanger that cools or heats the outside air introduced from the introduction port and is located on the path of the heat medium circuit, and the air supply port is formed. an air supply fan that is arranged in an air supply chamber and generates an air flow from the introduction port to the air supply port; an outside air conditioner having a supply air filter for purifying the filtered outside air.

With the above configuration, as described above, the heat exchanger of the outdoor air conditioner is incorporated in the heat medium circuit of the heat source device, so the air after heat exchange can be supplied to the room. The heat exchanger incorporated in the heat medium circuit of the heat source device can lower the indoor temperature to the target temperature in a short time, for example, when performing cooling operation using an air conditioner as the heat source device. Therefore, the operating load of the air conditioner can be reduced.

Further, the heat source device is an air conditioner having an indoor unit and an outdoor unit connected by a heat medium circuit, and the heat medium circuit includes a first refrigerant pipe for sending refrigerant from the outdoor unit to the indoor unit, When the second refrigerant pipe that sends the refrigerant from the outdoor air conditioner to the outdoor unit and the third refrigerant pipe that sends the refrigerant from the outdoor air conditioner to the outdoor unit are provided, the air conditioner and the outdoor air conditioner can be connected by a simple pipe structure. can be integrated.

By configuring the heat medium circuit as described above, during cooling operation, the refrigerant that has become a low-temperature liquid in the pressure reducer of the outdoor unit is sent to the indoor unit through the first refrigerant pipe, cooling the heat exchanger of the indoor unit. do. Part of the refrigerant that has cooled the heat exchanger of the indoor unit is sent to the outside air conditioner through the second refrigerant pipe to cool the heat exchanger of the outside air conditioner. After that, the refrigerant returns to the outdoor unit through the third refrigerant pipe, becomes a low-temperature liquid in the decompressor, and is sent to the first refrigerant pipe again. By repeating this cycle, the indoor unit and the heat exchanger of the outdoor air conditioner are efficiently cooled, promoting indoor ventilation and keeping the indoor temperature at the target temperature.

On the other hand, during heating operation, the cycle is opposite to that during cooling operation described above. That is, the refrigerant that has become a high-temperature gas in the outdoor unit is sent to the outdoor air conditioner through the third refrigerant pipe, and the heat of the refrigerant warms the heat exchanger of the outdoor air conditioner. Furthermore, the refrigerant is sent to the indoor unit through the second refrigerant pipe, warms the heat exchanger of the indoor unit, returns to the outdoor unit through the first refrigerant pipe, becomes a high-temperature gas in the compressor, and becomes a third refrigerant again. is sent to the refrigerant piping. By repeating this cycle, the indoor unit and the heat exchanger of the outdoor air conditioner can be efficiently warmed, promoting indoor ventilation and maintaining the indoor temperature at the target temperature.

In addition, if there is a duct that connects the inlet and a through hole formed through the wall surface of the building, outside air can be introduced to the outside air conditioner through the duct. Therefore, even if there is no window in the room where the outside air conditioner is installed, outside air can be introduced from the outside through the duct. At this time, a large amount of outside air can be taken into the outside air conditioner by an airflow that is generated by an air supply fan arranged in the air supply chamber and directed from the introduction port to the air supply port. Therefore, even in a wide room, ventilation can be performed in a short time.

To achieve the above object, the method of operating an outside air conditioning system of the present invention includes a heat source device having a heat medium circuit in which a refrigerant circulates, a heat exchanger connected to the heat medium circuit, and an inlet Outside air conditioner installed in the room of a building that supplies outside air introduced into the inside of the housing from the air supply port toward the room by the air supply fan through the heat exchanger provided on the way of the outside air introduction path. A method of operating an outside air conditioning system comprising: circulating a refrigerant in the heat medium circuit; generating an airflow directed from the inlet to the air supply port by the air supply fan; and introducing from the inlet passing said outside air through said heat exchanger; passing said outside air that has passed through said heat exchanger through a supply air filter located downstream of said heat exchanger to clean said outside air; and supplying the outside air cleaned by passing through the air supply filter toward the interior of the room from the air supply port.

Here, as a method of operating the outside air conditioning system, by providing a step of circulating the refrigerant in the heat medium circuit, the refrigerant passes through the heat exchanger of the outside air conditioner and circulates in the heat medium circuit. The heat exchanger can be cooled or heated.

In addition, by providing the step of generating an airflow directed from the inlet to the air supply port by the air supply fan, it is possible to generate an airflow in the air supply direction within the housing of the outside air conditioner. Therefore, the ventilation of the room can be promoted by efficiently guiding the outside air introduced from the inlet to the air supply port.

Further, by providing the step of passing the outside air introduced from the inlet port through the heat exchanger, the outside air introduced into the outside air conditioner is heated or cooled by heat exchange with the heat exchanger, and after heat exchange of air can be supplied toward the room. Therefore, when the air conditioner is used as the heat source device for cooling operation, the temperature in the room can be lowered to the target temperature in a short period of time, so the operating load of the air conditioner can be reduced.

In addition, by providing a step in which the outside air that has passed through the heat exchanger passes through an air supply filter located downstream of the heat exchanger to purify the outside air, contaminants and the like contained in the outside air are removed and the air is always fresh. Outdoor air can be supplied indoors.

By providing the process of supplying the outside air cleaned by passing through the supply air filter toward the room from the air supply port, the fresh air cleaned by the supply air filter is cooled or heated by the heat exchanger. Ventilation of the room can be promoted by supplying fresh outside air into the room from the air supply port.

Further, the step of passing the outside air introduced from the inlet through the heat exchanger includes a step of making the flow of the outside air introduced from the inlet into a turbulent state in the first compartment, and a step of making the flow of the outside air introduced from the inlet into a turbulent state. In the case of having a step of exchanging heat with the outside air in the heat exchanger and a step of flowing the heat-exchanged outside air into the second compartment, the outside air introduced from the inlet collides with the partition plate. turbulence can be generated in the first compartment because the flow direction is changed. Due to the turbulence of the ambient air, the entire volume of the ambient air is facilitated in heat exchange by the heat exchanger located in the first compartment. Since the entire amount of outside air that has undergone heat exchange in the first compartment flows into the second compartment, it is possible to prevent outside air that has not undergone heat exchange from flowing into the second compartment.

According to the outdoor air conditioner, the outdoor air conditioning system, and the method of operating the outdoor air conditioning system of the present invention, it is possible to promote indoor ventilation, reduce the operating load of the heat source device, and save energy.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which shows the general view of the outside air conditioning system which concerns on embodiment of this invention. It is a perspective view which shows the internal structure of an outside air conditioner. It is a side view which shows the internal structure of an outside air conditioner. FIG. 3 is a plan view showing an installation state of the outdoor air conditioner in a room;

Hereinafter, the outside air conditioner, the outside air conditioning system, and the method of operating the outside air conditioning system according to the embodiments of the present invention will be described with reference to the drawings for understanding of the present invention. In each figure, for convenience of explanation, when the outdoor air conditioner is installed on a horizontal surface, the upward direction is the upward direction, the opposite direction to the upward direction is the downward direction, and the axial direction represented by the upward and downward directions is the vertical direction. The vertical direction is defined as the horizontal direction respectively.

As shown in FIG. 1, the outdoor air conditioning system 1 according to the embodiment of the present invention is composed of an outdoor air conditioner 2 and an air conditioner 3. The outdoor air conditioner 2 is installed indoors in a building, and includes a heat exchanger 22 , an air supply filter 23 , and an air supply fan 24 inside a housing 21 . The detailed structure of the outdoor air conditioner 2 will be described below with reference to FIGS. 2 and 3. FIG.

In the following description, the air conditioner 3 is provided as the heat source device of the outside air conditioning system 1, and outside air processing using cold and hot heat of the refrigeration cycle of the air conditioner 3 as a heat medium will be mainly described. Instead of 3, for example, cold and hot heat from a cooling water circulating device, or cold and hot heat using geothermal heat or waste heat as a heat source may be used as a heat medium for the outside air treatment.

The housing 21 is erected on a base 27 made of stainless steel installed on the installation surface, and is formed of a heat-insulating panel in the shape of a substantially rectangular prism that is vertically long. An inlet 211 for introducing the outside air A is formed on the lower side of one side of the housing 21, and an air supply port 214 for supplying the outside air A introduced from the inlet 211 toward the room is formed on the upper side. It is Although the internal structure of the outdoor air conditioner 2 cannot be visually recognized from the outside, for convenience of explanation, FIGS.

Here, the housing 21 does not necessarily have to be made up of heat insulating panels. However, by configuring the housing 21 with heat insulating panels, it is possible to prevent the occurrence of dew condensation due to the temperature difference between the inside and outside of the housing 21, and to prevent malfunctions caused by dew condensation in each device housed inside the housing 21. can be prevented.

Also, the housing 21 does not necessarily have to be installed via the base 27 with respect to the installation surface. However, by installing the housing 21 on the base 27, there is no need to adjust the horizontal position or the vertical position of the housing 21 with respect to the installation surface. become a thing. In addition, since the horizontal and vertical positions of the housing 21 can be maintained, the mounting position of the air supply fan 24, which will be described later, is appropriate, and the condensed water from the heat exchanger 22 can be discharged vertically downward. can be done.

Also, the material of the base 27 does not have to be stainless steel. However, by forming the base 27 from a stainless steel material, the surface is prevented from being stained and is less likely to be scratched, resulting in a good external appearance.

Also, the shape of the housing 21 does not necessarily have to be a substantially quadrangular prism. It may have a shape such as a prism other than a quadrangular prism or a cylinder.

The inlet 211 is connected by a duct 4 to a through-hole 5 formed in the wall surface W of the room where the outdoor air conditioner 2 is installed, and fresh outdoor air A is always introduced into the housing 21 through the duct 4. It's like

A mesh inlet filter 25 is installed in the inlet 211 . The inlet filter 25 is a filter for trapping substances having relatively large particle diameters, such as insects and dust, which mainly enter the inside of the housing 21 together with the outside air A. As shown in FIG.

Here, it is not always necessary to install the inlet filter 25. However, by installing the inlet filter 25, as described above, it is possible to keep the inside of the housing 21 clean, and the inside of the housing 21 can be kept clean. It is possible to prevent failures caused by insects and dust entering various devices that are connected to the device.

Also, the inlet filter 25 may be provided with a deodorizing and antibacterial function by applying a predetermined coating. Furthermore, the mesh shape and mesh size of the inlet filter 25 can also be appropriately changed according to the purpose.

Inside the housing 21 , an outside air introduction path 216 is formed along the vertical direction of the housing 21 for guiding the outside air A introduced from the introduction port 211 to the air supply port 214 . The crossing angle between the direction in which the outside air A is introduced and the axial direction of the outside air introduction passage 216 is approximately 90 degrees. The outside air introduction passage 216 is partitioned by a partition plate 28 into a first partitioned chamber R1 on the upstream side (introduction port 211 side) and a second partitioned chamber R2 on the downstream side (air supply port 214 side). An opening 29 is formed in the approximate center of the partition plate 28, and the first partitioned chamber R1 and the second partitioned chamber R2 are communicated in both directions through the opening 29. A heat exchanger 22, which will be described later, is installed so as to face the first compartment R1.

Here, it is not always necessary to have the partition plate 28. However, by partitioning the outside air introduction path 216 into the first compartment R1 and the second compartment R2 by the partition plate 28, the entire amount of the outside air A introduced from the introduction port 211 is heated by the heat exchanger 22. It can be exchanged and flowed into the second compartment R2. Also, the outside air A introduced into the first compartment R1 from the inlet 211 collides with the partition plate 28 to change the direction of flow, and the outside air A is brought into a turbulent state in the first compartment R1. be able to. The turbulent outside air A has an increased chance of coming into contact with the heat exchanger 22 installed in the first compartment R1, so that the heat exchange of the outside air A can be further promoted.

The heat exchanger 22 can exchange heat with the outside air A introduced into the inlet 211. The heat transfer tube 221 has a meandering shape in which straight portions and folded portions are alternately continuous, and the heat transfer tube 221 It is a so-called fin tube type consisting of a plurality of fins 222 intersecting with each other.

The heat exchanger 22 is fixed to the partition plate 28 via known fixing means such as a mounting stay so that the main body portion composed of the heat transfer tubes 221 and the fins 222 corresponds to the opening hole 29 of the partition plate 28. . As shown in FIG. 3, the heat exchanger 22 is positioned at approximately 65 degrees (approximately 25 degrees with respect to the horizontal axis) toward the introduction port 211 with respect to the vertical axis direction of the housing 21 (the axial direction of the outside air introduction passage 216). is fixed inside the housing 21 so as to have an inclination angle of .

Here, the heat exchanger 22 does not necessarily have to be fixed so that the main body including the heat transfer tubes 221 and the fins 222 corresponds to the opening 29 of the partition plate 28 . However, by installing the main body of the heat exchanger 22 so as to correspond to the opening holes 29 of the partition plate 28, the outside air A heat-exchanged by the heat exchanger 22 passes through the opening formed in the main body to the opening holes 29. Therefore, the efficiency of inflow of outside air A from the first compartment R1 to the second compartment R2 can be enhanced.

Also, the heat exchanger 22 does not necessarily need to be installed to face the first compartment R1. However, by installing the heat exchanger 22 so as to face the first compartment R1, the entire amount of the outside air A can be heat-exchanged by the heat exchanger 22, and the condensed water dripping from the heat exchanger 22 Since all of the water is dripped into the water receiving portion 261, which will be described later, the condensed water does not accumulate inside the housing 21, and malfunctions of the internal devices caused by the condensed water can be prevented.

Also, the heat exchanger 22 does not necessarily have to be installed at a predetermined angle of inclination with respect to the vertical axis direction of the housing 21 . However, by installing the heat exchanger 22 so as to have a predetermined inclination angle with respect to the vertical axis direction of the housing 21, the heat exchanger 22 can be installed in a limited space. 21 can be prevented from increasing in size.

Further, by installing the heat exchanger 22 at a predetermined inclination angle, it is possible to achieve a rectifying effect for guiding the outside air A introduced from the inlet 211 into a vertically upward flow within the housing 21 . can be done. Further, during cooling operation of the air conditioner 3, the condensed water adhering to the heat exchanger 22 can be drained smoothly according to the inclination of the fins of the heat exchanger 22. As a result, it is possible to prevent stagnation due to the surface tension of condensed water and water droplets from narrowing the air circulation portion of the heat exchanger 22 and stagnation of the air flow.

Also, the installation angle of the heat exchanger 22 with respect to the vertical axis direction is not necessarily limited to approximately 65 degrees on the introduction port 211 side. It suffices if the entire amount of the outside air A introduced from the inlet 211 can be efficiently passed through the heat exchanger 22. can be changed as appropriate within the range of the inclination angle.

The heat exchanger 22 has a first inlet/outlet pipe 223 and a second inlet/outlet pipe 224 connected to the heat transfer pipes 221 . The ends of the first inlet/outlet pipe 223 and the second inlet/outlet pipe 224 protrude outside the housing 21 and are connected to the second refrigerant pipe in the heat medium circuit 33 connected to the air conditioner 3 described later via a joint. 332 and the third refrigerant pipe 333 can be connected and removed.

With the above configuration, the heat exchanger 22 circulates the refrigerant supplied from the outdoor unit 32 of the air conditioner 3 through the heat medium circuit 33, and can exchange heat with the outside air A. It's becoming The supply of this refrigerant is started when the air conditioner 8 starts operating, and stops when the air conditioner 8 stops operating. That is, the heat exchanger 22 has a structure that does not require a separate new power source because its operation is interlocked with the operation of the air conditioner 3 .

The air supply filter 23 is a filter device for purifying the outside air A by capturing contaminants and the like contained in the outside air A introduced from the inlet 211 . Similarly to the heat exchanger 22, the air supply filter 23 is inclined at a predetermined angle (approximately 45° ) on the downstream side of the heat exchanger 22 and in the second compartment R2.

Here, the air supply filter 23 does not necessarily have to be installed at a predetermined inclination angle with respect to the vertical axis direction of the housing 21 . However, by installing the air supply filter 23 at a predetermined inclination angle with respect to the vertical axis direction of the housing 21, the air supply filter 23 can be installed in a limited space. can prevent erosion.

Further, the installation angle of the air supply filter 23 with respect to the vertical axis direction is not necessarily limited to approximately 45 degrees on the introduction port 211 side. can be efficiently passed through the air supply filter 23, for example, the inclination angle can be changed appropriately in the range of about 30 degrees to 60 degrees toward the inlet 211 side with respect to the vertical axis direction of the housing 21. can be done.

The inlet filter 25 described above is a filter intended to trap relatively large particle size substances (insects and dust) contained in the outside air A, but the inlet filter 23 traps The mesh size of the filter is smaller than that of the inlet filter 25 because it is intended to capture fine particles that cannot be filtered.

An air supply chamber 212 is formed by a ceiling plate 213 in the upper part of the housing 21 . A communication hole (not numbered) is formed in the ceiling plate 213 so that the outside air A can communicate between the outside air introduction path 216 and the air supply chamber 212 . In addition, on the side surface of the air supply chamber 212, an air supply port 214 for blowing out the outside air A toward the room is formed at a total of three locations, the front side and the left and right side sides of the side surface of the housing. The outside air A introduced into the body 21 can be supplied from the air supply port 214 in three directions. A plurality of wind direction plates 215 are installed at the air supply port 214 at predetermined intervals.

Here, the wind direction plate 215 does not necessarily have to be installed. However, since the directivity of the outside air A at the time of air supply can be improved by installing the wind direction plate 215, the outside air A is evenly supplied to the entire room, so that the ventilation of the room can be promoted. .

An air supply fan 24 is installed in the air supply chamber 212 to generate an air flow from the introduction port 211 to the air supply port 214 along the outside air introduction path 216 . The air supply fan 24 includes fan blades 243 , a motor (not shown) for driving the fan blades 243 , a main body 241 housing the fan blades 243 and the motor, and a nozzle 244 connected to the main body 241 . ing.

The fan blades 243 are configured such that, for example, the sirocco fan, the wind tunnel surrounding the sirocco fan, and the casing can be separated, so that the sirocco fan that needs to be replaced periodically can be easily replaced. ing.

A main body 241 of the air supply fan 24 is suspended from the ceiling surface of the housing 21 by a fixing bracket 242, and is connected to a switch 245 for turning on the power to the motor and a controller 246 for setting the rotation speed of the motor. there is When the switch 245 is operated to turn on the power, the motor rotates at the rotation speed set by the controller 246, thereby driving the fan blades 243 connected to the motor.

Due to the rotation of the fan blades 243, an airflow is generated in the housing 21 from the introduction port 211 toward the air supply port 214 in the arrow direction in FIG. As a result, the outside air A can be introduced from the introduction port 211 to the outside air introduction path 216 and further supplied from the air supply port 214 into the room.

The number of rotations of the motor is set to approximately 2200 to 2300 rpm in normal operation, but is not limited to this. Based on the number of installed outdoor air conditioners 2, etc., it is possible to appropriately change so as to obtain the required ventilation volume.

A drain section 26 is installed vertically below the heat exchanger 22 to receive condensed water generated in the heat exchanger 22 and discharge it to the outside of the outside air conditioner 2 . The drain portion 26 includes a water receiving portion 261 for receiving condensed water dripped from the heat exchanger 22, a trap portion 263 for storing the condensed water dripped into the water receiving portion 261, and guiding the water from the water receiving portion 261 to the trap portion 263. It is composed of a drainage channel 262 for

A drain hole 264 communicating with a drainage channel 262 is formed at a predetermined position in the water receiving portion 261, and a slope having a predetermined inclination angle is formed toward the drain hole 264. Therefore, all of the condensed water dripped onto the water receiving portion 261 is drained from the drain hole 264 to the drainage channel 262 through the slope.

The trap part 263 is installed on the side surface of the housing 21 and has a predetermined volume for temporarily storing the condensed water drained through the drainage channel 262 . The trap portion 263 has an operation portion that can open and close a discharge hole (not shown) by, for example, pushing and pulling operations. Condensed water can be discharged outside the machine.

One of the sides of the housing has a door structure that can be opened and closed, and at the time of maintenance of the outdoor air conditioner 2, opening the door makes it easy to repair the equipment inside and replace parts. It is possible to do

Also, when the outdoor air conditioner 2 is installed indoors, it may be connected to a fixed object 6 such as a pillar in the room with a connecting member 7, as shown in FIG. By connecting the external air conditioner 2 to a fixed object with the connecting member 7 in this way, the fixation of the outdoor air conditioner 2 becomes strong, and the safety can be ensured by preventing the external air conditioner 2 from overturning in the event of an earthquake.

The air conditioner 3 has an indoor unit 31 installed in the upper part of the room of the building and an outdoor unit 32 installed outdoors. The heat medium circuit 33 is composed of a first refrigerant pipe 331, a second refrigerant pipe 332, and a third refrigerant pipe 333. The outdoor unit 32 and the indoor unit 31 are directly connected by the first refrigerant pipe 331. It is connected to the. Further, as described above, the indoor unit 31 and the outdoor air conditioner 2 are connected by the second refrigerant pipe 332 , and the outdoor air conditioner 2 and the outdoor unit 32 are connected by the third refrigerant pipe 333 .

Here, the air conditioner 3 does not necessarily have to consist of the indoor unit 31 and the outdoor unit 32. As long as the air conditioner 3 has the heat medium circuit 33, for example, an indoor installation type air conditioner that does not have the outdoor unit 32 can be used.

Next, the method of operating the outside air conditioning system 1 will be explained. In addition, below, the example at the time of cooling operation as an operation mode of the air conditioner 3 is mainly demonstrated.

<Operation of air conditioner>
First, when the operation of the air conditioner 3 is started, the refrigerant that has become a low-temperature liquid in the pressure reducer (not shown) of the outdoor unit 32 is sent to the indoor unit 31 through the first refrigerant pipe 331, and the indoor unit 31 Cool the heat exchanger (not shown).

<Cooling of the heat exchanger of the outdoor air conditioner>
Part of the refrigerant that has cooled the heat exchanger of the indoor unit 31 is sent to the outside air conditioner 2 through the second refrigerant pipe 332 to cool the heat exchanger 22 of the outside air conditioner 2 . The refrigerant that has cooled the heat exchanger 22 returns to the outdoor unit 32 again through the third refrigerant pipe 333 , becomes a low-temperature liquid in the pressure reducer, and is sent to the first refrigerant pipe 331 again. By repeating the above cycle, the heat exchanger of the outside air conditioner 2 is efficiently cooled.

<Generation of airflow in outside air conditioner>
When the power of the motor of the outside air conditioner 2 is turned on, the motor rotates at a preset number of revolutions, thereby rotating the fan blades 243 of the air supply fan 24 . Rotation of the fan blades 243 generates an airflow in the outside air introduction passage 216 from the introduction port 211 toward the air supply port 214 .

<Cooling outside air>
Rotation of the fan blades 243 introduces outside air A from the inlet 211 into the first compartment R1. At this time, if the inlet filter 25 is installed at the inlet 211, insects and dust introduced together with the outside air A are captured. The outside air A introduced into the first compartment R1 becomes turbulent in the first compartment R1, and heat exchange by the heat exchanger 22 is promoted. That is, the outside air A introduced at the outside temperature is cooled to a predetermined level by contact with the heat exchanger 22 .

<Purification of outside air>
The entire amount of the outside air A cooled by the heat exchanger 22 flows into the second compartment R2 and passes through the supply air filter 23 installed in the second compartment R2 to remove contaminants and the like contained in the outside air A. is captured and cleaned.

<Supply of outside air into the room>
The outside air A cleaned through the air supply filter 23 flows into the air supply chamber 212 through the outside air introduction passage 216 and is supplied into the room through the air supply port 214 . The outside air A supplied into the room is cooled to a predetermined level by the heat exchanger 22 . Therefore, it is possible to reduce the time required for the temperature of the air conditioner 3 to reach the target temperature by supplying the outside air A into the room, so that the load on the air conditioner 3 can be reduced. Furthermore, since contaminants and the like are removed by the air supply filter 23, fresh outside air A is always supplied into the room. At this time, by operating an exhaust fan (not shown) installed in the room, the ventilation of the room can be further promoted.

When the air conditioner 3 is in heating operation, the cycle is the reverse of that in cooling operation. That is, the refrigerant that has become a high-temperature gas in the outdoor unit 32 is sent to the outdoor air conditioner 2 through the third refrigerant pipe 333, and the heat of the refrigerant warms the heat exchanger 22 of the outdoor air conditioner 2. Furthermore, the refrigerant is sent to the indoor unit 31 through the second refrigerant pipe 332, warms the heat exchanger 22 of the indoor unit 31, and then returns to the outdoor unit 32 through the first refrigerant pipe 331, and the high-temperature gas is and is sent to the third refrigerant pipe 333 again. By repeating this cycle, the indoor unit 31 and the heat exchanger 22 of the outdoor air conditioner 2 are efficiently warmed, promoting indoor ventilation and maintaining the indoor temperature at the target temperature.

As described above, the outdoor air conditioner, the outdoor air conditioning system, and the method of operating the outdoor air conditioning system according to the present invention can promote indoor ventilation and reduce the operating load of the heat source device to achieve energy saving. It has become.

1 outside air conditioning system 2 outside air conditioner 21 housing 211 inlet 212 air supply chamber 213 ceiling plate 214 air supply port 215 wind direction plate 216 outside air introduction path 217 communication hole 22 heat exchanger 221 heat transfer tube 222 fins 223 first inlet/outlet pipe 224 second inlet/outlet pipe 23 air supply filter 24 air supply fan 241 main body 242 fixing bracket 243 fan blade 244 nozzle 245 switch 246 controller 25 inlet filter 26 drain section 261 water receiving section 262 drainage channel 263 trap section 264 drain hole 27 base 28 partition plate 29 aperture 3 air conditioner 31 indoor unit 32 outdoor unit 33 heat medium circuit 331 first refrigerant pipe 332 second refrigerant pipe 333 third refrigerant pipe 4 duct 5 through hole 6 fixed object 7 connection Member A Outside air R1 First compartment R2 Second compartment W Wall

Claims

An outdoor air conditioner installed indoors in a building,
An inlet for introducing outside air, an air supply chamber formed with an air supply port for supplying the outside air introduced from the introduction port into the room, and a housing formed with an outside air introduction path leading from the introduction port to the air supply chamber body and
a heat exchanger incorporated in a heat medium circuit of an external heat source device and arranged on the outside air introduction path for cooling or heating the outside air introduced from the introduction port;
an air supply fan arranged in the air supply chamber and configured to generate an airflow from the introduction port toward the air supply port;
an air supply filter that is arranged on the outside air introduction passage and downstream of the heat exchanger and that purifies the outside air introduced from the introduction port.
The outside air introduction path is partitioned into a first partitioned chamber on the upstream side and a second partitioned chamber on the downstream side, and the first partitioned chamber and the second partitioned chamber are communicated at a predetermined position. Having a partition plate with an opening hole,
The heat exchanger is arranged in the first compartment, and a main body portion comprising fins of the heat exchanger and heat transfer tubes connected to the fins is fixed to the partition plate so as to correspond to the opening holes. rice field,
The outdoor air conditioner according to claim 1.
an angle of intersection between a direction of outside air introduced from the inlet and an axial direction of the outside air introduction passage is approximately 90 degrees;
3. The outdoor air conditioner according to claim 1, wherein the heat exchanger is installed at an inclination angle of approximately 45 degrees to 75 degrees on the inlet side with respect to the axial direction of the outdoor air introduction passage.
4. The air supply port according to any one of claims 1 to 3, wherein the air supply port has a wind direction plate that partitions into a plurality of flow paths that allow the outside air that has passed through the outside air introduction path to be supplied toward the room. Outside air conditioner.
The outdoor air conditioner according to any one of claims 1 to 4, wherein the inlet has an inlet filter having at least one of insect repellent, dust removing, deodorizing, and antibacterial functions.
Having a drain portion between the inlet and the heat exchanger for discharging condensed water dripping from the heat exchanger to the outside of the machine,
the drain portion includes a water receiving portion that receives condensed water dripping from the heat exchanger;
a trap portion for storing dew condensation water dripped onto the water receiving portion;
The outdoor air conditioner according to any one of claims 1 to 5, further comprising a drainage channel for guiding condensed water from the water receiver to the trap.
The outdoor air conditioner according to any one of claims 1 to 6, wherein the housing is erected on a base made of a stainless steel material installed on an installation surface.
The outdoor air conditioner according to any one of claims 1 to 7, wherein one side surface of the housing has a door portion for opening and closing an opening.
The outdoor air conditioner according to any one of claims 1 to 8, wherein the air supply fan is configured such that a sirocco fan, a wind tunnel surrounding the sirocco fan, and a casing are separable.
a heat source device having a heat medium circuit in which a refrigerant circulates;
A housing installed in a room of a building and formed with an outside air introduction path leading to an air supply port for supplying outside air introduced from an introduction port for introducing outside air into the room, cooling or heating the outside air introduced from the introduction port a heat exchanger on the path of the heat medium circuit, an air supply fan arranged in an air supply chamber in which the air supply port is formed and generating an air flow from the introduction port toward the air supply port, on the outside air introduction path An outside air conditioning system, comprising: an outside air conditioner provided downstream of the heat exchanger and having a supply air filter for purifying outside air introduced from the inlet.
The heat source device is an air conditioner having an indoor unit and an outdoor unit connected by the heat medium circuit,
The heat medium circuit is
a first refrigerant pipe that sends refrigerant from the outdoor unit to the indoor unit;
a second refrigerant pipe that sends refrigerant from the indoor unit to the outdoor air conditioner;
11. The outdoor air conditioning system according to claim 10, further comprising a third refrigerant pipe that sends refrigerant from the outdoor air conditioner to the outdoor unit.
The outside air conditioning system according to claim 10 or 11, further comprising a duct that connects the introduction port and a through hole formed through a wall surface of the building.
A heat source device having a heat medium circuit in which a refrigerant circulates, and a heat exchanger connected to the heat medium circuit. Outside air introduced into the housing from an inlet is provided in the middle of the outside air introduction path by an air supply fan. and an outdoor air conditioner installed in a room of a building that supplies air from an air supply port toward the room through the heat exchanger that is installed,
A step of circulating a refrigerant in the heat medium circuit;
generating an airflow directed from the inlet to the air supply port by the air supply fan;
a step of passing the outside air introduced from the inlet through the heat exchanger;
a step of cleaning the outside air by passing the outside air that has passed through the heat exchanger through a supply air filter located downstream of the heat exchanger;
A method of operating an outside air conditioning system, comprising: supplying the outside air cleaned by passing through the air supply filter through the air supply port toward the interior of the room.
The outside air introduction path is partitioned into a first partitioned chamber on the upstream side and a second partitioned chamber on the downstream side by a partition plate having an opening hole formed at a predetermined position, and the heat exchanger includes fins and the fins. is installed on the side of the first compartment via the partition plate so that the main body including the heat transfer tube connected to the opening corresponds to the opening hole,
The step of allowing the outside air introduced from the inlet to pass through the heat exchanger,
making the flow of the outside air introduced from the inlet into a turbulent state in the first compartment;
a step of heat-exchanging the outside air in a turbulent state with the heat exchanger;
14. The method of operating an outdoor air conditioning system according to claim 13, comprising the step of allowing the heat-exchanged outside air to flow into the second compartment.