Air conditioning system

Abstract

To provide an air conditioning system with high-performance air supply capacity that can efficiently and stably supply cool or warm air to a space to be air-conditioned. [Solution] An air conditioning system utilizing a vapor compression type refrigeration cycle comprises a user-side unit 10 equipped with a user-side heat exchanger 12 that cools or heats the air sent to the space to be air-conditioned, and a user-side blower fan 13 that sends the air cooled or heated by the user-side heat exchanger 12 to the space to be air-conditioned. The user-side blower fan 13 is an axial flow fan having a first propeller fan 30 and a second propeller fan 31 that has the same rotation center as the first propeller fan 30 and rotates in the opposite direction to the first propeller fan 30. With this configuration, the air cooled or heated by the user-side heat exchanger 12 can be efficiently sent to a long distance by the user-side blower fan 13.

Description

Technical Field

[0001] The present invention relates to an air conditioner, and particularly to a blowing technology of a user-side unit in an air conditioner using a refrigeration cycle.

Background Art

[0002] Conventionally, in an air conditioner using a vapor compression refrigeration cycle, it is known to provide a blowing fan such as a propeller fan in the user-side unit. Specifically, the user-side unit is provided with a user-side heat exchanger and a user-side blowing fan, and the air cooled or heated by the user-side heat exchanger is sent to the air-conditioned space by the user-side blowing fan.

[0003] For example, Patent Document 1 discloses an air conditioner including a user-side unit provided with a user-side heat exchanger and a user-side blowing fan. The air cooled or heated by the user-side heat exchanger is sent to the space requiring air conditioning by the user-side blowing fan.

[0004] Further, the air conditioner disclosed in the same document includes a heat source-side unit provided with a heat source-side heat exchanger and a heat source-side blowing fan and connected to the user-side unit via a refrigerant pipe, and a movable pedestal on which the user-side unit and the heat source-side unit are placed.

[0005] This type of air conditioner is used for spot air conditioning, etc. that efficiently cools or heats a working space, etc. by sending cold air or warm air near workers, etc. in a large space where it is difficult to install a normal air conditioner, such as a factory, a workplace, a warehouse, a gymnasium, etc.

[0006] Also, for example, Patent Document 2 discloses that in this type of mobile air conditioner, a duct for guiding the air cooled or heated by the user-side heat exchanger to the air-conditioned space is attached to the air outlet of the user-side unit.

[0007] This configuration, in which a duct is attached to the air outlet of the user-side unit, allows for efficient delivery of air from the user-side unit of the air conditioning system to the space requiring air conditioning, without requiring extensive renovation work on factories, warehouses, or other spaces that need air conditioning. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Japanese Patent Publication No. 2024-86478 [Patent Document 2] Japanese Patent Publication No. 2024-2277 [Overview of the project] [Problems that the invention aims to solve]

[0009] However, the conventional air conditioning systems described above needed improvement to further enhance the airflow performance of the user-side fan, enabling them to efficiently deliver cool or warm air to areas requiring cooling or heating.

[0010] Specifically, the conventional air conditioning system disclosed in Patent Document 1 has a movable configuration in which the user-side unit and the heat source-side unit are mounted on a single frame, and has excellent air conditioning performance that can powerfully blow cool air or the like towards the space to be air-conditioned, even in large spaces such as factories.

[0011] However, in locations where it is difficult to move air conditioning equipment due to narrow space or obstruction of work, even better airflow performance may be required to ensure that the air for cooling or heating reaches spaces far from the air conditioning equipment.

[0012] Furthermore, a configuration utilizing ducts, as disclosed in Patent Document 2, has excellent airflow performance, enabling the delivery of cool air to distant spaces where it is needed.

[0013] However, since the system utilizes ducts, duct manufacturing is required, and even when using the air conditioning, tasks such as duct assembly, installation, and removal are necessary. Therefore, there is sometimes a need for an air conditioning system that can be easily used without installing ducts and has excellent airflow capacity to suitably blow cool or warm air into the air-conditioned space.

[0014] Furthermore, in the conventional air conditioning system described above, one user-side blower fan is provided in the user-side unit. With such a configuration, there is a problem in that if the user-side blower fan stops due to a malfunction or other reason, it becomes impossible to supply cool air to the air-conditioned space.

[0015] The present invention has been made in view of the above circumstances, and its object is to provide an air conditioning system having high performance air supply capacity that can efficiently and stably supply cool or warm air to a space to be air-conditioned. [Means for solving the problem]

[0016] The air conditioning system of the present invention is an air conditioning system that utilizes a vapor compression type refrigeration cycle, and comprises a user-side unit equipped with a user-side heat exchanger for cooling or heating air sent to a space to be air-conditioned, and a user-side blower fan for sending the air cooled or heated by the user-side heat exchanger to the space to be air-conditioned, wherein the user-side blower fan is an axial flow fan having a first propeller fan and a second propeller fan having the same center of rotation as the first propeller fan and rotating in the opposite direction to the first propeller fan. [Effects of the Invention]

[0017] The air conditioning system of the present invention is an air conditioning system that utilizes a vapor compression type refrigeration cycle and comprises a user-side unit equipped with a user-side heat exchanger that cools or heats the air sent to the space to be air-conditioned, and a user-side blower fan that sends the air cooled or heated by the user-side heat exchanger to the space to be air-conditioned, wherein the user-side blower fan is an axial flow fan having a first propeller fan and a second propeller fan that has the same rotation center as the first propeller fan and rotates in the opposite direction to the first propeller fan. With this configuration, the air cooled or heated by the user-side heat exchanger can be efficiently sent to a long distance by the user-side blower fan.

[0018] Specifically, the user-side blower fan has a first propeller fan and a second propeller fan that rotate in opposite directions. This allows the swirling component of the air blown out by the first propeller fan to be recovered by the second propeller fan, which rotates in the opposite direction. As a result, compared to the case where air is blown out by a single blower fan, the diffusion of air in the radial direction of rotation can be suppressed, and a highly efficient airflow with high linearity can be formed, allowing a large amount of cool air to reach distant locations.

[0019] Therefore, the air conditioning system of the present invention can efficiently supply cooling or heating air to spaces far away, which was difficult with conventional air conditioning systems, and can perform highly efficient air conditioning operation.

[0020] Further, the air conditioner of the present invention includes a heat source side heat exchanger and a heat source side blower fan, a heat source side unit provided with the heat source side blower fan and connected to the utilization side unit via a refrigerant pipe, and a movable pedestal on which the utilization side unit and the heat source side unit are placed. The utilization side unit and the heat source side unit may be arranged back to back such that the air outlet from the utilization side blower fan and the air outlet from the heat source side blower fan face in opposite directions. With such a configuration, the user can easily move the air conditioner. Then, the air conditioner can efficiently blow suitable cold air or warm air with high linearity toward the air conditioning target space that requires cooling or heating, and can blow out the waste heat air of cooling or heating to the space opposite to the air conditioning target space. Therefore, high-efficiency cooling or heating operation can be performed.

[0021] Further, in the air conditioner of the present invention, a plurality of utilization side blower fans having the same form may be provided in the utilization side unit. Thus, by providing a plurality of utilization side blower fans capable of sending air in a linear and highly efficient flow, a large amount of cold air or warm air can be efficiently supplied to a remotely located air conditioning target space.

[0022] Also, by providing a plurality of utilization side blower fans, even if one utilization side blower fan stops, air for air conditioning can be supplied using other utilization side blower fans. Therefore, even if a failure or the like occurs in the utilization side blower fan, the influence on the air conditioning target space due to the failure can be minimized, and stable air conditioning operation can be performed.

[0023] Further, in the air conditioner of the present invention, the utilization side blower fans may be provided in a plurality of rows and columns on one surface of the housing of the utilization side unit. With such a configuration, high-efficiency and stable air blowing can be performed by a plurality of utilization side blower fans for a remotely located air conditioning target space that requires cold air or the like.

[0024] In addition, in the air conditioner of the present invention, at least one of the user-side blower fans may be provided such that the direction of the rotation axis is different from that of the other user-side blower fans. Thereby, the direction of the air blown from some of the user-side blower fans can be changed, and cooled or heated air can be supplied to a wide range of the remote air-conditioning target space.

[0025] In addition, in the air conditioner of the present invention, a plurality of the user-side units may be provided for one of the heat source-side units. Thereby, by using a plurality of user-side units having excellent blowing performance, stable and highly efficient cooling or heating with a large supply air volume can be performed for a remote air-conditioning target space.

[0026] In addition, in the air conditioner of the present invention, the user-side unit may be provided so as to be arranged in a plurality of rows and a plurality of columns as viewed from the air-conditioning target space. Thereby, by using a plurality of user-side units capable of highly linear blowing, stable and highly efficient cooling or heating with a large supply air volume can be performed for a remote air-conditioning target space.

[0027] In addition, in the air conditioner of the present invention, at least one of the user-side units may be provided such that the direction of the rotation axis of the user-side blower fan is different from that of the other user-side units. Thereby, for some of the user-side units, the blowing direction can be changed, and cooled or heated air can be supplied to a wide range of the remote air-conditioning target space.

Brief Description of the Drawings

[0028] [Figure 1] It is a side view showing a schematic configuration of an air conditioner according to an embodiment of the present invention. [Figure 2] It is a perspective view showing a schematic configuration of a user-side blower fan of an air conditioner according to an embodiment of the present invention. [Figure 3] It is a perspective view showing a schematic configuration of an air conditioner according to another embodiment of the present invention. [Figure 4]A perspective view showing a schematic configuration of an air conditioning system according to yet another embodiment of the present invention. [Figure 5] This is a plan view showing a schematic configuration of an air conditioning system according to yet another embodiment of the present invention. [Figure 6] This is a plan view showing a schematic configuration of an air conditioning system according to another embodiment of the present invention. [Modes for carrying out the invention]

[0029] Hereinafter, an air conditioning system 1 according to an embodiment of the present invention will be described in detail with reference to the drawings. Figure 1 is a side view showing a schematic configuration of an air conditioning device 1 according to an embodiment of the present invention. As shown in Figure 1, the air conditioning device 1 is a portable, powerful spot air conditioner in which a user-side unit 10 and a heat source-side unit 20 are integrally mounted on a frame 40.

[0030] The air conditioning system 1 is a device capable of at least one of cooling and heating, and can provide air conditioning for large spaces where it is difficult to install conventional packaged air conditioners or other air conditioning units. The air conditioning system 1 may be used, for example, for air conditioning in various factories, workshops, warehouses, and gymnasiums.

[0031] The user-side unit 10 is a device that primarily cools or heats the air on the user side and supplies it to the air-conditioned object. The user-side unit 10 has a configuration equivalent to the indoor unit of a typical packaged air conditioner.

[0032] Specifically, the user-side unit 10 has a housing 11 which is a roughly box-shaped enclosure made of a metal plate or the like, and a user-side heat exchanger 12 and a user-side blower fan 13, which are components that make up the refrigeration cycle, are provided inside the housing 11.

[0033] The heat source unit 20 is a device that primarily releases or absorbs heat from the refrigerant to air that is not subject to air conditioning. The heat source unit 20 has a configuration equivalent to the outdoor unit of a typical packaged air conditioner.

[0034] Specifically, the heat source unit 20 has a housing 21 which is a roughly box-shaped enclosure made of a metal plate or the like, and a heat source heat exchanger 22 and a heat source blower fan 23, which are components that make up the refrigeration cycle, are provided inside the housing 21.

[0035] The user-side heat exchanger 12 of the user-side unit 10 is a heat exchanger that cools or heats the air supplied to the space to be air-conditioned, and is connected to the heat source-side heat exchanger 22 of the heat source-side unit 20 via refrigerant piping 28.

[0036] More specifically, the user-side heat exchanger 12 and the heat source-side heat exchanger 22 are connected via a compressor (not shown) that compresses the low-pressure refrigerant to a high pressure, an expansion valve (not shown) that expands the high-pressure refrigerant to a low pressure, refrigerant piping 28, and other refrigerant piping (not shown). Thus, the user-side heat exchanger 12 and the heat source-side heat exchanger 22 constitute a vapor compression type refrigeration cycle circuit. The refrigerant used in the refrigeration cycle is, for example, an HFC refrigerant.

[0037] The housing 11 of the user-side unit 10 has an air intake port 15 for drawing in air and an air outlet port 16 for blowing out air. Inside the air intake port 15, a user-side heat exchanger 12 is provided to perform heat exchange between the air drawn in from outside the housing 11 and the refrigerant. As a result, for example, during cooling operation, the user-side heat exchanger 12 acts as an evaporator, and the air drawn in from outside is cooled by the refrigerant that evaporates inside the user-side heat exchanger 12.

[0038] The air outlet 16 is equipped with a user-side blower fan 13 that sends the air inside the housing 11, which has been cooled or heated through heat exchange with the user-side heat exchanger 12, to the space to be air-conditioned. The user-side blower fan 13 is, for example, a propeller fan. Details of the user-side blower fan 13 will be described later.

[0039] A fan guard 14 is provided at the outlet 16. The fan guard 14 is made of a synthetic resin material or the like and surrounds the outer circumference of the user-side blower fan 13, forming a roughly cylindrical shape, for example. The fan guard 14 also covers the outlet side of the user-side blower fan 13 so that air can flow through it.

[0040] The fan guard 14 may also be used as an airflow guide to adjust the direction of airflow supplied by the user-side blower fan 13. That is, the fan guard 14 may be equipped with a variable airflow adjustment plate (not shown) to adjust the airflow. With this configuration, the air cooled or heated by the user-side heat exchanger 12 can be efficiently directed towards the air-conditioned space.

[0041] The housing 21 of the heat source unit 20 has an air intake port 25 for drawing in air and an air outlet port 26 for blowing out air. Inside the air intake port 25, there is a heat source side heat exchanger 22 that performs heat exchange between the air drawn in from the outside and the refrigerant. As a result, for example, during cooling operation, the refrigerant in the heat source side heat exchanger 22 is cooled by the air flowing in from the air intake port 25. In other words, the air drawn in from the air intake port 25 is heated by heat exchange with the refrigerant in the heat source side heat exchanger 22.

[0042] The outlet 26 is equipped with a heat source side blower fan 23 that sends the air inside the housing 21, which has exchanged heat with the heat source side heat exchanger 22, to the outside. The heat source side blower fan 23 is, for example, a propeller fan and is rotationally driven by a motor (not shown). For example, two heat source side blower fans 23 are provided, one above the other.

[0043] A fan guard 24 is provided at the outlet 26. The fan guard 24 is made of a metal material or a synthetic resin material, and covers the outlet side of the heat source side blower fan 23 so that air supplied from the heat source side blower fan 23 can flow through. In addition, the fan guard 24 may be arranged in pairs, for example, one above the other, to correspond to the two heat source side blower fans 23 which are arranged vertically.

[0044] Furthermore, the fan guard 24 may be used as an airflow guide to adjust the direction in which the air supplied by the heat source side blower fan 23 is blown out. Specifically, the fan guard 24 has an outer frame that surrounds the outer circumference of the heat source side blower fan 23, for example, in a roughly rectangular shape, and a variable airflow adjustment plate (not shown) may be provided inside the fan guard 24 to adjust the airflow. With this configuration, the air heated or cooled by the heat source side heat exchanger 22 can be efficiently blown out in a direction away from the space to be air-conditioned.

[0045] The frame 40 is a platform that integrally supports the user-side unit 10 and the heat source-side unit 20 so that they can move freely, and is formed from, for example, angle steel, channel steel, or other steel materials. A base 41 is formed at the lower part of the frame 40, with its outer circumference forming a roughly rectangular frame shape when viewed from above. The heat source-side unit 20 is fixed to the upper part of the base 41.

[0046] Although not shown in the diagram, the frame 40 may consist of a user-side frame on which the user-side unit 10 is placed, and a heat source-side frame on which the heat source-side unit 20 is placed. In such a configuration, the user-side frame and the heat source-side frame may be connected via a hinge or the like so as to be able to rotate horizontally.

[0047] The frame 40 has a user-side unit mounting base 42 for mounting the user-side unit 10. Specifically, the user-side unit mounting base 42 is formed to protrude upward from the top of the base 41. This allows the bottom of the user-side unit 10 to be fixed at a higher position than the bottom of the heat source-side unit 20.

[0048] For example, the user-side unit 10 may be placed on the user-side unit mounting base 42 such that the top surface of the user-side unit 10 and the top surface of the heat source-side unit 20 are at approximately the same height. By positioning the user-side unit 10 at a higher position in this way, the position of the air outlet 16 of the user-side unit 10 is raised, allowing the cool or warm air for air conditioning to be blown widely and efficiently into the workspace.

[0049] The upper part of the user-side unit 10 and the upper part of the heat source-side unit 20 may be detachably connected and fixed by a connecting member 44. The connecting member 44 supports the upper part of the user-side unit 10 and the upper part of the heat source-side unit 20, suppressing deformation of the air conditioning system 1 due to vibrations during transport or use.

[0050] Wheels 43 are provided near the lower corners of the base 41. The wheels 43 are, for example, casters with rubber wheels, and one end may be a fixed wheel that can move in a predetermined direction, while the other end may be a swivel wheel that can change direction. With the wheels 43 provided, the frame 40 is configured to be movable while integrally supporting the user-side unit 10 and the heat source-side unit 20.

[0051] A drain pan (not shown) may be provided below the user-side unit 10 and the heat source-side unit 20. The drain pan is a component for receiving moisture that adheres to and drips from the user-side heat exchanger 12 of the user-side unit 10 or the heat source-side heat exchanger 22 of the heat source-side unit 20, and draining it into a drain pipe (not shown). By providing a drain pan, moisture dripping from the user-side heat exchanger 12 or the heat source-side heat exchanger 22 can be collected and drained effectively, preventing moisture from splashing into the workspace.

[0052] Figure 2 is a perspective view showing the schematic configuration of the user-side blower fan 13 of the air conditioning unit 1. As shown in Figure 2, the user-side blower fan 13 is an axial flow fan having a fan 30 as a first propeller fan and a fan 31 as a second propeller fan.

[0053] Figure 2 schematically shows the rotation directions of fans 30 and 31 with arrows. The airflow direction is also schematically shown with a dashed-dotted arrow. Fans 30 and 31 have approximately the same center of rotation, but rotate in opposite directions. That is, fan 31 rotates approximately coaxially with fan 30, and when viewed from the front of the user-side unit 10 (see Figure 1), i.e., looking from the air outlet direction towards the outlet 16, it rotates in the opposite direction to fan 30.

[0054] The user-side blower fan 13 may be equipped with two fan motors 32 and 33. The fan motors 32 and 33 have substantially the same axis of rotation; for example, one fan motor 32 rotates the fan 30, and the other fan motor 33 rotates the fan 31. The fan motors 32 and 33 rotate in opposite directions when viewed from the front.

[0055] The positional relationship between the fans 30 and 31 and the fan motors 32 and 33 that drive them can take various forms. For example, as shown in Figure 2, the two fans 30 and 31 may be arranged facing each other, with the fan motor 32 located on the intake side of fan 30, i.e., towards the inside of the housing 11, and the fan motor 33 located on the discharge side of fan 31, i.e., towards the outside of the housing 11. In other words, the two fan motors 32 and 33 may be arranged facing each other. In such a configuration, the two fan motors 32 and 33 can be motors of the same specifications that rotate in the same direction as individual motors before assembly.

[0056] Alternatively, contrary to the example shown in Figure 2, although not shown in the illustration, a configuration in which two fan motors 32 and 33 are provided between fan 30 and fan 31 is also possible. That is, the two fan motors 32 and 33 may be arranged back-to-back with their output shafts facing opposite directions. With such a configuration, fan motors 32 and 33 can be of the same specifications, and fan 30 and fan 31 can be driven to rotate in opposite directions.

[0057] Although not shown in the diagram, a configuration in which a fan motor 32 is provided on the intake side of fan 30 and a fan motor 33 is provided on the intake side of fan 31 is also possible. Alternatively, a configuration in which a fan motor 32 is provided on the discharge side of fan 30 and a fan motor 33 is provided on the discharge side of fan 31 is also possible. In this configuration, fan motors 32 and 33 rotate in opposite directions, and fans 30 and 31 rotate in opposite directions when viewed from the front.

[0058] Although not shown in the diagram, it is also possible to have a configuration in which only one fan motor 32 rotates both fans 30 and 31, i.e., both fan 30 and fan 31. In this way, by providing two fans 30 and 31 that rotate in opposite directions on a nearly coaxial axis, the air cooled or heated by the user-side heat exchanger 12 can be efficiently sent to a distant location by the user-side blower fan 13.

[0059] Specifically, the user-side blower fan 13 has a first propeller fan 30 and a second propeller fan 31 that rotate in opposite directions. Therefore, the swirling component of the air blown out by fan 30 can be recovered by the fan 31 which rotates in the opposite direction.

[0060] As a result, compared to conventional air conditioning systems that use a single fan to blow out air, the diffusion of air in the radial direction of rotation of the user-side fan 13 can be suppressed. Therefore, the user-side fan 13, which has two fans 30 and 31 that rotate in opposite directions, can form a highly efficient airflow with high linearity that can deliver a large amount of cool air over long distances.

[0061] Thus, the air conditioning system 1 can efficiently supply cooling or heating air to spaces far away, which was difficult with conventional air conditioning systems, and can perform highly efficient air conditioning operation.

[0062] Furthermore, as explained with reference to Figure 1, the air conditioning system 1 includes a movable frame 40 on which the user-side unit 10 and the heat source-side unit 20 are mounted. The user-side unit 10 and the heat source-side unit 20 are arranged back-to-back such that the air outlet 16 from the user-side blower fan 13 and the air outlet 26 from the heat source-side blower fan 23 face in opposite directions.

[0063] This configuration allows users to easily move the air conditioning unit 1. The air conditioning unit 1 can efficiently blow highly linear and suitable cool or warm air toward the air-conditioned space requiring cooling or heating using the user-side blower fan 13, which has two fans 30 and 31 that rotate in opposite directions. The heat source-side blower fan 23 can blow out the waste heat air from the cooling or heating process toward the space opposite to the air-conditioned space. Therefore, highly efficient cooling or heating operation can be performed.

[0064] Next, with reference to Figures 3 to 4, air conditioning devices 101 and 201 according to other embodiments of the present invention will be described in detail. Components that have the same or similar functions and effects as those in the embodiments already described will be denoted by the same reference numerals, and their descriptions will be omitted.

[0065] Figure 3 is a perspective view showing the schematic configuration of an air conditioning system 101 according to another embodiment of the present invention, and is a view of the user-side unit 10 as seen from the outlet 16 side. As shown in Figure 3, the air conditioning system 101 is provided with a plurality of user-side blower fans 13 of the same form in the user-side unit 10.

[0066] As already explained with reference to Figure 2, the user-side blower fan 13 is an axial flow fan having a fan 30 as a first propeller fan and a fan 31 as a second propeller fan that has the same rotation center as fan 30 and rotates in the opposite direction to fan 30.

[0067] Furthermore, as shown in Figure 3, the user-side blower fans 13 may be arranged in multiple rows and columns on one surface of the housing 11 of the user-side unit 10 so as to blow air in substantially the same direction. Specifically, the user-side blower fans 13 may be arranged on the front of the housing 11 so as to blow air in front of the user-side unit 10, for example, in 2 to 3 rows vertically and 2 to 3 columns horizontally.

[0068] In this way, by providing multiple user-side blower fans 13 that can deliver air in a linear and highly efficient flow, highly efficient and stable airflow can be achieved by multiple user-side blower fans 13. Therefore, a large amount of cool or warm air can be efficiently supplied to an air-conditioned space located far away.

[0069] Furthermore, by providing multiple user-side blower fans 13, even if one user-side blower fan 13 stops, the other user-side blower fans 13 can be used to supply air for air conditioning to the air-conditioned space. Therefore, even if a user-side blower fan 13 malfunctions, the impact on the air-conditioned space due to the malfunction can be minimized, and stable air conditioning operation can be achieved.

[0070] Furthermore, the configuration with multiple user-side blower fans 13 allows each user-side blower fan 13 to be miniaturized. That is, the desired airflow can be obtained even with smaller user-side blower fans 13. Therefore, the manufacturing of user-side blower fans 13 having two fans 30 and 31 that rotate in opposite directions becomes easier, and productivity is improved.

[0071] Figure 4 is a perspective view showing a schematic configuration of an air conditioning system 201 according to yet another embodiment of the present invention, and shows the user-side unit 10 and the heat source-side unit 20 as seen from the outlet 16 side. As shown in Figure 4, there may be multiple user-side units 10.

[0072] Specifically, the air conditioning system 201 may have multiple user-side units 10, for example, 2 to 10 units, connected to a single heat source-side unit 20. Furthermore, the user-side units 10 may be arranged in multiple stages and multiple rows when viewed from the air-conditioning air outlet side, i.e., the air-conditioning target space side, for example, in 2 to 3 stages vertically and 2 to 3 rows horizontally. This allows for stable, highly efficient cooling or heating with a large supply of air to a remote air-conditioning target space by utilizing multiple user-side units 10, each equipped with a user-side blower fan 13 that has excellent airflow performance and is capable of highly linear airflow.

[0073] Although not shown in the diagram, the user-side units 10, which are provided in multiple units for a single heat source-side unit 20, may each be configured to have multiple user-side blower fans 13, as shown in Figure 3. This allows for excellent airflow performance and the use of compact and highly productive user-side blower fans 13.

[0074] Figure 5 is a plan view showing a schematic configuration of an air conditioning system 301 according to yet another embodiment of the present invention. As shown in Figure 5, at least one user-side unit 10 may be provided such that the direction of the rotation axis of the user-side blower fan 13 is oriented in a different direction from that of the other user-side blower fans 13. With such a configuration, the direction of airflow can be changed for some of the user-side units 10 to supply cooled or heated air to a wide area of ​​the air-conditioned space located far away.

[0075] Specifically, for example, in a configuration where the user-side units 10 are arranged in three rows, that is, three units lined up horizontally when viewed from the air-conditioned space, the central user-side unit 10a is provided such that the rotation axis of the user-side blower fan 13 faces approximately forward. The left and right user-side units 10b may be provided such that the rotation axes of the user-side blower fans 13 spread outwards to the left and right toward the front, that is, toward the direction of airflow.

[0076] In other words, the central user unit 10a is configured to blow cooled or heated air out in a direction approximately forward, while the left and right user units 10b are configured to blow air out diagonally to the front left and right outwards. This makes it possible to provide cool or warm air over a long distance and over a wide area.

[0077] Furthermore, the user-side unit 10 may have adjustable mounting angles and positions relative to the base 40 (see Figure 1) or the like, so that the direction of rotation of the user-side blower fan 13, i.e., the direction of airflow, can be adjusted. This allows the direction of rotation of the user-side blower fan 13 to be adjusted according to the space to be air-conditioned, enabling efficient supply of cool or warm air within a suitable range.

[0078] Furthermore, the user-side unit 10 may be provided with an angle-adjustable user-side blower fan 13 so that the angle of the rotation axis of the user-side blower fan 13 relative to the housing 11 can be adjusted, that is, so that the direction of airflow can be adjusted. This allows for appropriate adjustment of the supply of cool or warm air to correspond to the location of users who require cooling or heating, thereby enabling highly efficient air conditioning.

[0079] Figure 6 is a plan view showing the schematic configuration of the air conditioning system 301, and illustrates another example in which the direction of airflow from the user-side blower fan 13 is adjusted. As shown in Figure 6, for example, the central user-side unit 10a may be positioned at a different angle, similar to the left and right user-side units 10b, to allow adjustment of the direction of rotation of the user-side blower fan 13 and suitably adjust the direction of airflow.

[0080] Specifically, for example, the left and right user-side units 10b may be positioned diagonally so that the rotation axis of the user-side blower fan 13 points outwards to the front left and right, and the central user-side unit 10a may also be positioned diagonally so that the rotation axis of the user-side blower fan 13 points to the front right or left.

[0081] This allows the orientation of the user-side units 10a and 10b to be suitably adjusted according to the location, size, etc., of the space to be air-conditioned, thereby efficiently supplying air for air conditioning. For example, even when the personnel arrangement in the work area of ​​the space to be air-conditioned, such as a manufacturing line or logistics warehouse, is asymmetrical in front of the air conditioning unit 301, the orientation of the central user-side unit 10a can be changed to adjust the direction of airflow according to the arrangement of workers. Therefore, cool or warm air can be effectively supplied to workers who require air conditioning.

[0082] Furthermore, as shown in Figure 3, in an air conditioning system 101 having a plurality of user-side blower fans 13 on the front of the housing 11, although not shown, at least one user-side blower fan 13 may be provided such that the direction of its rotation axis, i.e., the direction of air discharge, is different from that of the other user-side blower fans 13.

[0083] Even with this configuration, as shown in Figures 5 and 6, the direction of the air blown out from some of the user-side blower fans 13 can be changed to supply cooled or heated air to a wide area of ​​the air-conditioned space located far away.

[0084] Furthermore, the direction of the rotation axis of the user-side blower fan 13 is not limited to the examples shown in Figures 5 and 6, and various configurations are possible. For example, when there are two air-conditioned spaces requiring cooling or heating located at different locations, adjusting the direction of airflow from the user-side blower fan 13 makes it possible to provide suitable cool or warm air to each air-conditioned space.

[0085] For example, although not shown in the diagram, the direction of the rotation axis of each user-side blower fan 13 may be set so that the air blown out from each user-side blower fan 13 forms a swirling flow. This allows for efficient supply of cool or warm air to distant spaces where air conditioning is required.

[0086] It should be noted that the present invention is not limited to the above embodiments. For example, the user-side blower fan 13 having two fans 30 and 31 that rotate in opposite directions may be used in a user-side unit 10 that is not mounted on a stand 40. Even in a fixed user-side unit 10 that is not mounted on such a mobile stand 40, for example, the user-side blower fan 13 will exhibit excellent airflow performance. The present invention can be modified in various ways without departing from its essence. [Explanation of symbols]

[0087] 1, 101, 201, 301: Air conditioning equipment 10, 10a, 10b: User-side units 11: Housing 12: User side heat exchanger 13: User-side blower fan 14: Fan Guard 15: Inlet 16:Air outlet 20: Heat source side unit 21: Housing 22:Heat source side heat exchanger 23: Heat source side blower fan 24: Fanguard 25: Inlet 26:Air outlet 28: Refrigerant piping 30: Fan (First propeller fan) 31: Fan (Second propeller fan) 32: Fan motor 33: Fan motor 40: Stand 41: Base 42: Installation stand for user-side unit 43 :Wheel 44: Connecting member

Claims

1. An air conditioning system that utilizes a vapor compression type refrigeration cycle, The system comprises a user-side unit equipped with a user-side heat exchanger for cooling or heating the air supplied to the space to be air-conditioned, and a user-side blower fan for supplying the air cooled or heated by the user-side heat exchanger to the space to be air-conditioned. The air conditioning device is characterized in that the user-side blower fan is an axial flow fan having a first propeller fan and a second propeller fan that has the same rotation center as the first propeller fan and rotates in the opposite direction to the first propeller fan.

2. A heat source side unit is provided with a heat source side heat exchanger and a heat source side blower fan, and is connected to the user side unit via refrigerant piping, The system comprises a movable frame on which the user-side unit and the heat source-side unit are mounted, The air conditioning system according to claim 1, characterized in that the user-side unit and the heat source-side unit are arranged back-to-back such that the air outlet from the user-side blower fan and the air outlet from the heat source-side blower fan face in opposite directions.

3. The air conditioning device according to claim 1 or 2, characterized in that the user-side unit is provided with a plurality of user-side blower fans of the same form.

4. The air conditioning device according to claim 3, characterized in that the user-side blower fan is provided in multiple rows and columns on one side of the housing of the user-side unit.

5. The air conditioning device according to claim 3, characterized in that at least one of the user-side blower fans is provided such that the direction of its rotation axis is oriented in a different direction from that of the other user-side blower fans.

6. The air conditioning system according to claim 2, characterized in that a plurality of user-side units are provided for one heat source-side unit.

7. The air conditioning system according to claim 6, characterized in that the user-side units are arranged in multiple rows and columns when viewed from the space to be air-conditioned.

8. The air conditioning device according to claim 6, characterized in that at least one of the user-side units is provided such that the direction of the rotation axis of the user-side blower fan is oriented in a different direction from that of the other user-side units.

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