Air conditioning system

Abstract

To provide an air conditioner that has a small installation area, is easy to move, and can send cooled or heated air at a suitable temperature with excellent air conditioning performance to the air-conditioned space. 【Solution means】A user-side unit 10 having a user-side heat exchanger 12 and a user-side fan 13, a heat source-side unit 20 having a heat source-side heat exchanger 22, a heat source-side fan 23, and a compressor, and a movable pedestal 30 on which the user-side unit 10 and the heat source-side unit 20 are placed. The air conditioner is configured to send air cooled or heated by the user-side heat exchanger 12 to the air-conditioned space by the user-side fan 13. The user-side unit 10 and the heat source-side unit 20 are arranged back to back such that the user-side air outlet 16 from which air from the user-side fan 13 blows out and the heat source-side air outlet 26 from which air from the heat source-side fan 23 blows out are outward in opposite directions. A plurality of user-side fans 13 are provided in the user-side unit 10.

Description

Technical Field

[0001] The present invention relates to an air conditioner for a movable spot air conditioner, and more particularly to an air conditioner in which a user-side unit and a heat source-side unit are placed on a movable stand and integrated.

Background Art

[0002] A mobile air conditioner that performs spot air conditioning is known as an air conditioner used for cooling or heating large-scale spaces where it is difficult to install a normal air conditioner, such as factories, workplaces, warehouses, gymnasiums, etc. As this type of air conditioner, there is one in which a user-side unit and a heat source-side unit are integrally provided on a movable stand.

[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 blower fan, a heat source-side unit provided with a heat source-side heat exchanger and a heat source-side blower fan and connected to the user-side unit via a refrigerant pipe, and a movable stand on which the user-side unit and the heat source-side unit are placed.

[0004] In the air conditioner disclosed in the same document, an air outlet is formed at one location on the outer surface of the housing of the user-side unit, and one user-side blower fan for sending the air inside the housing, which has exchanged heat between the refrigerant and the user-side heat exchanger, to the outside is provided at the air outlet.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In this type of air conditioner, sufficient cooling capacity to cool the air so that the air supplied to the air-conditioned space reaches a suitable temperature, or sufficient heating capacity to heat the air, is required. For example, in order to supply air at a suitable temperature to the air-conditioned space in response to an increase in the area of the air-conditioned space due to the enlargement of a facility or the like, it is necessary to further enhance the air-conditioning capacity of the air conditioner.

[0007] In addition, in order to cope with rising outdoor air temperatures such as extremely hot days and sweltering days, which are presumably due to the influence of recent climate change in recent years, or in order to cope with low outdoor air temperatures due to abnormal cold waves, it is necessary to further improve the cooling or heating capacity of the air conditioner.

[0008] However, in conventional air conditioners, there is a limit to the improvement of the cooling or heating capacity. For example, in summer when the ambient temperature becomes very high due to the rise in the outdoor air temperature, a sufficient air-conditioning effect for heatstroke prevention may not be obtained.

[0009] In addition, in order to obtain the necessary cooling capacity or heating capacity, it may be considered to increase the number of installed air conditioners. However, when the number of air conditioners is increased, the space occupied by the air conditioners increases, making the air conditioners obstructive, and there is a problem that the working space and storage space, which are the original intended uses of the facility space such as factories and warehouses, become narrower.

[0010] In addition, in order to enhance the cooling or heating capacity, it may be considered to increase the size of the air conditioner. However, even by increasing the size of the air conditioner, the floor area occupied by the air conditioner increases. Also, when the height of the air conditioner is increased to make it larger without increasing the occupied area, there is a problem that the air conditioner becomes unstable and difficult to move.

[0011] In addition, when the temperature difference between the ambient temperature and the blown-out air temperature from the air conditioner becomes large in order to enhance the cooling or heating capacity, the amount of condensed water generated in the air conditioner increases, and there is also a problem that the condensed water drips below the air conditioner or scatters around.

[0012] The present invention has been made in view of the above circumstances, and an object thereof is to provide an air conditioner that has a small installation area, is easy to move, exhibits excellent air conditioning performance, and can send cooled or heated air at a suitable temperature to an air-conditioned space.

Means for Solving the Problems

[0013] The air conditioner of the present invention includes a user-side unit having a user-side heat exchanger and a user-side fan, a heat source-side unit having a heat source-side heat exchanger, a heat source-side fan, and a compressor, and a movable pedestal on which the user-side unit and the heat source-side unit are placed. It is an air conditioner that uses a vapor compression refrigeration cycle to send the air cooled or heated by the user-side heat exchanger to the air-conditioned space by the user-side fan. The user-side unit and the heat source-side unit are arranged back-to-back so that the user-side air outlet from which the air from the user-side fan blows out and the heat source-side air outlet from which the air from the heat source-side fan blows out face outward in opposite directions, and a plurality of the user-side fans are provided in the user-side unit.

Effects of the Invention

[0014] The air conditioner of the present invention includes a user-side unit having a user-side heat exchanger and a user-side fan, a heat source-side unit having a heat source-side heat exchanger, a heat source-side fan, and a compressor, and a movable pedestal on which the user-side unit and the heat source-side unit are placed. The air conditioner sends the air cooled or heated by the user-side heat exchanger to the air-conditioning target space by the user-side fan. The user-side unit and the heat source-side unit are arranged back to back such that the user-side air outlet from which the air from the user-side fan blows out and the heat source-side air outlet from which the air from the heat source-side fan blows out face outward in opposite directions. A plurality of the user-side fans are provided in the user-side unit. Thus, without increasing the size of the pedestal and greatly expanding the installation area of the air conditioner, the air volume of the air that exchanges heat with the user-side heat exchanger can be increased by using a plurality of user-side fans, and the air-conditioning capacity of the air conditioner can be improved. Then, the air cooled or heated to a suitable temperature by the user-side heat exchanger can be efficiently sent out by a plurality of user-side fans and supplied to the air-conditioning target space.

[0015] Further, in the air conditioner of the present invention, the user-side fans may be arranged in a plurality of upper and lower rows along one surface of the user-side unit. Thus, the air-conditioning performance can be enhanced without enlarging the pedestal and expanding the installation area of the user-side unit. Therefore, the cooling or heating capacity can be increased while maintaining a small floor area occupied by the air conditioner.

[0016] Also, since the user-side fans are provided in a plurality of upper and lower rows in the user-side unit, even without a user-side unit installation base that raises the installation surface of the user-side unit on the pedestal, suitable air blowing can be performed from the upper user-side fans toward a distant air-conditioning target space. Therefore, the number of components constituting the pedestal can be reduced and productivity can be enhanced.

[0017] In addition, in the air conditioner of the present invention, two utilization-side fans may be provided vertically. With such a configuration, the utilization-side unit can be formed into a suitably shaped and well-balanced shape, and the utilization-side fans and the utilization-side heat exchanger can be set to suitable sizes and arrangements respectively. Therefore, an air conditioner with a suitable size that can be easily moved and installed can exhibit excellent air conditioning performance.

[0018] In addition, in the air conditioner of the present invention, a plurality of utilization-side air outlets are formed in the utilization-side unit so as to correspond to the plurality of utilization-side fans respectively, and a utilization-side air direction guide for adjusting the flow direction of the air sent by the utilization-side fans may be provided at each of the utilization-side air outlets. Thereby, the air sent to the utilization-side fans and sent out from the utilization-side air outlets can be efficiently guided in an appropriate direction and supplied to the air-conditioned target space.

[0019] In addition, in the air conditioner of the present invention, the utilization-side fans and the heat source-side fans are propeller fans, and the blowing air speed of the utilization-side fans may be set to be greater than the blowing air speed of the heat source-side fans. Thereby, the air sent out from the utilization-side unit by the utilization-side fans can be efficiently supplied toward a remotely located air-conditioned target space.

[0020] In addition, in the air conditioner of the present invention, the utilization-side unit and the heat source-side unit are formed to be at the same height and may be connected by a connecting support member at the upper part. With such a configuration, excellent cooling or heating performance can be obtained, and the utilization-side unit and the heating-side unit can be prevented from tipping over or the like. The user can apply force to the upper part of the utilization-side unit or the heat source-side unit to safely and easily move the air conditioner.

[0021] In addition, in the air conditioner of the present invention, a drain tank space into which a movable drain tank for storing condensed water generated in the utilization-side unit or the heat source-side unit can be inserted may be formed in the pedestal. Thereby, it is possible to prevent the surrounding floor surface, production products, stored products, etc. from getting wet due to the condensed water dripping or scattering from the air conditioner during high-output air-conditioning operation in which the temperature difference from the ambient temperature becomes large.

[0022] Further, in the air conditioner of the present invention, a plurality of the heat source-side fans are provided in the heat source-side unit, the heat source-side fans are arranged in a plurality of stages vertically along one surface of the heat source-side unit, and a plurality of the heat source-side blow-out ports are formed in the heat source-side unit so as to correspond to the plurality of the heat source-side fans respectively, and a heat source-side air-direction guide for adjusting the flow direction of the air sent by the heat source-side fan may be provided in each of the heat source-side blow-out ports. With such a configuration, an air conditioner can be obtained that has a small installation area, is easy to move, exhibits excellent air-conditioning performance, and can send cooled or heated air at a suitable temperature to the air-conditioning target space.

Brief Description of the Drawings

[0023] [Figure 1] It is a perspective view showing a schematic configuration of an air conditioner according to an embodiment of the present invention. [Figure 2] It is a side view showing a schematic configuration of an air conditioner according to an embodiment of the present invention. [Figure 3] It is a side view showing a drain tank space of an air conditioner according to an embodiment of the present invention. [Figure 4] It is a side view showing a state in which a drain tank of an air conditioner according to an embodiment of the present invention is inserted. [Figure 5] It is a perspective view showing a schematic configuration of an air conditioner according to another embodiment of the present invention. [Figure 6] It is a perspective view showing a schematic configuration of an air conditioner according to another embodiment of the present invention.

Mode for Carrying Out the Invention

[0024] Hereinafter, the air conditioner according to an embodiment of the present invention will be described in detail based on the drawings. FIG. 1 is a perspective view showing a schematic configuration of an air conditioner 1 according to an embodiment of the present invention. The air conditioner 1 is a device that performs air conditioning operation using a vapor compression refrigeration cycle. Specifically, it is a device that supplies cold air or warm air to a local air conditioning target space that requires cooling or heating in large-scale facilities such as factories, workplaces, warehouses, and gymnasiums.

[0025] As shown in FIG. 1, the air conditioner 1 is a movable powerful spot air conditioner that integrates a utilization-side unit 10 and a heat source-side unit 20. Specifically, the air conditioner 1 has a utilization-side unit 10 and a heat source-side unit 20 placed on a pedestal 30.

[0026] FIG. 2 is a side view showing a schematic configuration of the air conditioner according to an embodiment of the present invention. Referring to FIGS. 1 and 2, the utilization-side unit 10 is a device that mainly cools or heats the utilization-side air and supplies it to the air conditioning target space. The utilization-side unit 10 has a configuration corresponding to the indoor unit of a general package air conditioner.

[0027] Specifically, the utilization-side unit 10 has a housing 11 that is a substantially box-shaped body formed from a metal plate material or the like, and a utilization-side heat exchanger 12 and a utilization-side fan 13, which are components constituting a refrigeration cycle, are provided inside the housing 11.

[0028] The heat source-side unit 20 is a device that mainly radiates or absorbs heat from the refrigerant to the air outside the air conditioning target. The heat source-side unit 20 has a configuration corresponding to the outdoor unit of a general package air conditioner.

[0029] Specifically, the heat source-side unit 20 has a housing 21 that is a substantially box-shaped body formed from a metal plate material or the like, and a heat source-side heat exchanger 22 and a heat source-side fan 23, which are components constituting a refrigeration cycle, are provided inside the housing 21.

[0030] The housing 11 of the utilization-side unit 10 and the housing 21 of the heat-source-side unit 20 are both formed in an outdoor installation specification, and the utilization-side unit 10 has a specification substantially equivalent to that of the heat-source-side unit 20 in terms of weather resistance and waterproofness.

[0031] The utilization-side heat exchanger 12 of the utilization-side unit 10 is connected to the heat-source-side heat exchanger 22 of the heat-source-side unit 20 via a refrigerant pipe 27. Specifically, the utilization-side heat exchanger 12 and the heat-source-side heat exchanger 22 are connected via a compressor (not shown) that compresses low-pressure refrigerant into high-pressure, an expansion valve (not shown) that expands high-pressure refrigerant into low-pressure, the refrigerant pipe 27, and other refrigerant pipes (not shown), constituting a vapor compression refrigeration cycle circuit. The refrigerant used in the refrigeration cycle is, for example, an HFC refrigerant or the like.

[0032] In the housing 11 of the utilization-side unit 10, a suction port 15 that is an opening for sucking ambient air into the interior of the housing 11 and a blowout port 16 that is an opening serving as a utilization-side blowout port for blowing air out from the interior of the housing 11 are formed.

[0033] The utilization-side heat exchanger 12, which performs heat exchange between the air sucked from the surroundings and the refrigerant, is provided at the suction port 15. The utilization-side heat exchanger 12 is, for example, a fin-and-tube type heat exchanger. For example, during cooling operation, the air sucked from the surroundings is cooled by the refrigerant evaporating in the utilization-side heat exchanger 12.

[0034] Incidentally, the number of rows of heat transfer tubes of the utilization-side heat exchanger 12, that is, the number of rows of heat transfer tubes in the direction in which air flows, is, for example, 2 rows. The number of rows of heat transfer tubes of the utilization-side heat exchanger 12 may also be 3 rows, 4 rows, or 5 rows or more. Also, the number of rows of heat transfer tubes of the utilization-side heat exchanger 12 may be more than the number of rows of heat transfer tubes of the heat-source-side fan 23. By setting the number of rows of heat transfer tubes of the utilization-side heat exchanger 12 to 2 rows or more, for example, the temperature of the blown-out air during cooling operation can be lowered, and excellent effects such as heatstroke prevention measures on sweltering days can be expected.

[0035] In the air conditioner 1 according to this embodiment, a plurality of air outlets 16 are formed in the user-side unit 10. Specifically, a pair of upper and lower air outlets 16 are formed on one surface of the housing 11 of the user-side unit 10, that is, the left surface in FIG. 2.

[0036] Each air outlet 16 is provided with a user-side fan 13 that blows out the air in the housing 11 that has exchanged heat with the user-side heat exchanger 12 to the outside. That is, a plurality of user-side fans 13, for example, two in the vertical direction, are provided corresponding to the plurality of formed air outlets 16 respectively. The user-side fan 13 is, for example, a propeller fan or the like and is rotationally driven by a motor (not shown).

[0037] With the configuration in which a plurality of user-side fans 13 are provided in this way, without increasing the size of the pedestal 30 and greatly expanding the installation area of the air conditioner 1, the air volume of the air that exchanges heat with the user-side heat exchanger 12 by using the plurality of user-side fans 13 can be increased, and the air-conditioning capacity of the air conditioner 1 can be improved. Then, the air cooled or heated to a suitable temperature by the user-side heat exchanger 12 can be efficiently sent out by the plurality of user-side fans 13 and widely and effectively supplied to the air-conditioned target space.

[0038] In particular, in the air conditioner 1, the user-side fans 13 are arranged in a plurality of upper and lower rows along the front surface of the user-side unit 10. Thereby, the air-conditioning performance can be improved without enlarging the pedestal 30 and expanding the installation area of the user-side unit. Therefore, the cooling or heating capacity of the air conditioner 1 can be increased while maintaining a small floor area occupied by the air conditioner 1.

[0039] Also, since the user-side fans 13 are provided in a plurality of upper and lower rows, without providing a user-side unit installation base or the like that raises the installation surface of the user-side unit 10 on the pedestal 30, suitable air blowing can be performed from the upper user-side fan 13 toward the remote air-conditioned target space. Therefore, the number of components constituting the pedestal 30 can be reduced and the productivity can be increased.

[0040] In addition, with the configuration in which two utilization-side fans 13 are provided vertically, the utilization-side unit 10 takes a suitable form with good balance. Also, the utilization-side fans 13 and the utilization-side heat exchanger 12 can each have suitable sizes and arrangements. Therefore, the air conditioner 1 of a suitable size can exhibit excellent air conditioning capacity.

[0041] Note that the blowing air speed of the utilization-side fan 13 may be set to be greater than the blowing air speed of the heat source-side fan 23. Thereby, the air sent out from the utilization-side unit 10 by the utilization-side fan 13 can be efficiently supplied toward a remote air conditioning target space.

[0042] In the air conditioner 1 according to the present embodiment, a particularly powerful utilization-side fan 13 is mounted. Specifically, the utilization-side fan 13 has a powerful blowing ability to blow out air at a wind speed of 8 m / s from the air outlet 16. Thereby, the cooled or heated air can be delivered far away, and a wide indoor space or the like can be efficiently cooled or heated.

[0043] In addition, at each air outlet 16, a wind direction guide 14 for adjusting the flow direction of the air sent by the utilization-side fan 13 is provided. The wind direction guide 14 has an outer peripheral portion surrounding the outer periphery of the utilization-side fan 13, for example, in a substantially cylindrical or substantially polygonal cylindrical form.

[0044] The inside surrounded by the outer peripheral portion of the wind direction guide 14 is an opening connected to the air outlet 16 through which air flows. Inside the wind direction guide 14, a variable wind direction adjustment plate (not shown) for adjusting the air flow is provided. With such a configuration, the air cooled or heated by the utilization-side heat exchanger 12 can be efficiently flowed toward the air conditioning target space that requires it.

[0045] Thus, in the air conditioner 1, a plurality of air outlets 16 are formed in the user-side unit 10 so as to correspond to the plurality of user-side fans 13 respectively, and a wind direction guide 14 for adjusting the flow direction of the air sent by the air outlet 16 is provided at each air outlet 16. Thereby, the air cooled or heated by the user-side heat exchanger 12, sent to the user-side fan 13, and sent out from the air outlet 16 can be efficiently guided in an appropriate direction and supplied to the air-conditioned space.

[0046] In the housing 21 of the heat source-side unit 20, a suction port 25 which is an opening for sucking air into the inside of the housing 21 and an air outlet 26 which is an opening serving as a heat source-side air outlet for blowing air from the inside of the housing 21 to the outside are formed.

[0047] A heat source-side heat exchanger 22 for performing heat exchange between the air sucked from the surroundings and the refrigerant is provided at the suction port 25. The heat source-side heat exchanger 22 is, for example, a fin-and-tube type heat exchanger. For example, during the cooling operation, the refrigerant in the heat source-side heat exchanger 22 is cooled and condensed by the air flowing in from the suction port 25. In other words, the air sucked from the suction port 25 is heated by exchanging heat with the refrigerant in the heat source-side heat exchanger 22.

[0048] Note that the number of rows of heat transfer tubes of the heat source-side heat exchanger 22, that is, the number of rows of heat transfer tubes in the direction in which air flows, is, for example, 2 rows. The number of rows of heat transfer tubes of the heat source-side heat exchanger 22 may be 3 rows, 4 rows or 5 rows or more.

[0049] A plurality of air outlets 26 are provided on the outer surface of the heat source-side unit 20, that is, the right surface in FIG. 2, and a plurality of heat source-side fans 23 are provided in the heat source-side unit 20 so as to correspond to the respective air outlets 26. For example, two air outlets 26 are formed so as to be arranged vertically, and the heat source-side fans 23 are also provided in two upper and lower stages so as to correspond to the air outlets 26.

[0050] With such a configuration, the heat source side unit 20 can efficiently discharge the high-temperature air heated by the refrigerant through the waste heat of the cooling operation or the air that has been cooled to a low temperature by absorbing heat from the refrigerant as the heat source of the heating operation, towards the outside away from the air-conditioning target space. Therefore, an air conditioner 1 with a small installation area, easy to move, and excellent air-conditioning performance can be obtained.

[0051] Each air outlet 26 is provided with a fan guard 24 that covers the air outlet 26. The fan guard 24 has an outer frame portion, for example, in a substantially rectangular shape that surrounds the outer periphery of the heat source side fan 23, and is formed from a metal plate material, a resin plate material, or the like.

[0052] The fan guard 24 may be formed to have a wind direction guide mechanism for adjusting the flow direction of the blown air, similar to the wind direction guide 14 of the utilization side unit 10. That is, a variable wind direction adjustment plate (not shown) for adjusting the air flow may be provided inside the fan guard 24.

[0053] By providing the heat source side fans 23 in two upper and lower stages in this way, and providing the fan guards 24 having a wind direction guide mechanism at the corresponding upper two-stage air outlets 26, it is possible to discharge the air unnecessary for air conditioning in a direction away from the air-conditioning target space. Therefore, an air conditioner 1 with a small installation area, easy to move, and excellent air-conditioning performance can be obtained.

[0054] The pedestal 30 is a pedestal that integrally supports the utilization side unit 10 and the heat source side unit 20. The pedestal 30 is formed from, for example, angle steel, channel steel, or other steel materials. The outer periphery of the pedestal 30 is formed in a substantially rectangular frame shape in a top view, and the utilization side unit 10 and the heat source side unit 20 are fixed to the upper part of the pedestal 30.

[0055] Near the corner at the bottom of the pedestal 30, wheels 31 are provided. The wheels 31 are, for example, casters having rubber wheels or the like, and may be fixed wheels with one end side movable in a predetermined one direction and swivel wheels with the other end side capable of changing direction. By providing the wheels 31, the pedestal 30 is configured to be movable while integrally supporting the usage-side unit 10 and the heat-source-side unit 20.

[0056] The usage-side unit 10 and the heat-source-side unit 20 are provided on the pedestal 30 such that the suction ports 15 and 25 that each suck air face each other. That is, the usage-side unit 10 and the heat-source-side unit 20 are arranged back to back such that the usage-side heat exchanger 12 side and the heat-source-side heat exchanger 22 side face each other.

[0057] In other words, the usage-side unit 10 and the heat-source-side unit 20 are arranged such that the air outlets 16 of the usage-side unit 10 and the air outlets 26 of the heat-source-side unit 20 face outward so that each blows air in the opposite direction.

[0058] As described above, by arranging the usage-side unit 10 and the heat-source-side unit 20 such that the suction ports 15 and 25 face each other inward and the air outlets 1� and 26 face in the opposite directions so as to blow air in the opposite directions, efficient air conditioning for large-scale factories, logistics warehouses, etc. is achieved.

[0059] That is, the cooled or heated air can be efficiently blown from the air outlet 16 of the usage-side unit 10 to the working area to be air-conditioned. And, from the air outlet 26 of the heat-source-side unit २० facing the opposite side of the air outlet 16 of the usage-side unit 10, the exhaust heat air for air conditioning can be discharged to a space away from the space that requires air conditioning.

[0060] Also, in the air conditioner 1, the usage-side unit 10 and the heat-source-side unit 20 are formed to be at the same height. Thereby, the handling performance of the air conditioner 1 is improved and excellent air conditioning performance is obtained.

[0061] In addition, the user side unit 10 and the heat source side unit 20 are connected at the upper part by a connecting support member 28. With such a configuration, excellent cooling or heating performance can be obtained, and the user side unit 10 and the heat source side unit 20 can be prevented from tipping over or the like. For example, the user can apply a force to the upper part of the user side unit 10 or the heat source side unit 20 to safely and easily move the air conditioner 1.

[0062] A drain pan 32 is provided below the user side unit 10 at the upper part of the pedestal 30. The drain pan 32 is a member for receiving moisture that adheres to and drips from the user side heat exchanger 12 and the housing 11 of the user side unit 10. By providing the drain pan 32, the condensed water dripping from the user side unit 10 can be collected and properly drained, and moisture can be prevented from scattering into the air-conditioned space.

[0063] Although not shown in the figure, the drain pan 32 may be provided below the heat source side unit 20. That is, the drain pan 32 is provided in at least one of the user side unit 10 and the heat source side unit 20.

[0064] Also, the bottom plate (not shown) of the housing 11 of the user side unit 10 or the bottom plate (not shown) of the housing 21 of the heat source side unit 20 may be formed to receive all the condensed water dripping from the user side unit 10 or the heat source side unit 20, like the drain pan 32.

[0065] A drain tank 34 (see FIG. 3) for storing the moisture that drips into and converges in the drain pan 32 may be provided below the drain pan 32. For example, the pedestal 30 is provided with a drain tank space 33 into which the drain tank 34 can be inserted.

[0066] FIG. 3 is a side view showing the drain tank space 33 of the air conditioner 1 according to the embodiment of the present invention. As shown in FIG. 3, the pedestal 30 is formed with a drain tank space 33 for inserting the drain tank 34.

[0067] The drain tank 34 is a container that stores condensation water that drips from the user-side unit 10, is received and collected in the drain pan 32. The drain tank 34 is mounted on a movable drain tank stand 35 supported by tank stand support casters 36, and is configured to be movable.

[0068] A drain tank space 33 is formed in the frame 30 below the drain tank 34, that is, below the user-side unit 10. Specifically, a space is secured near the end of the frame 30 on the user-side unit 10 side (near the left end in Figure 3), and below the drain pan 32, with a height and width that allows the drain tank 34 to pass through, thus forming the drain tank space 33.

[0069] Because such a drain tank space 33 is formed, the drain tank 34 can be easily inserted below the drain pan 32 from near the end of the support frame 30 on the user-side unit 10 side.

[0070] Figure 4 is a side view showing the state in which the drain tank 34 of the air conditioning system 1 according to an embodiment of the present invention is inserted. As shown in Figure 4, the formation of a drain tank space 33 allows the drain tank 34 to be placed below the drain pan 32. This allows condensation water generated in the user-side unit 10 and dripped onto the drain pan 32 to be stored in the drain tank 34. Therefore, during high-output air conditioning operation where the temperature difference with the ambient temperature is large, it is possible to prevent the surrounding floor surface, products, and stored items from getting wet due to condensation water dripping or splashing from the air conditioning unit 1. Thus, the air conditioning unit 1 can perform high-performance air conditioning operation.

[0071] Although not shown in the diagram, as mentioned above, the drain pan 32 may be provided below the heat source unit 20 to receive condensation water generated on the heat source unit 20. If the drain pan 32 is provided below the heat source unit 20, the drain tank space 33 may be formed below the drain pan 32, i.e., below the heat source unit 20. The drain tank space 33 may also be formed so that the drain pan 32 can be easily inserted from near the end of the frame 30 on the heat source unit 20 side (near the right end in Figure 4).

[0072] Next, examples of modifications to the 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.

[0073] Figure 5 is a perspective view showing a schematic configuration of an air conditioning system 101 according to another embodiment of the present invention. Referring to Figure 5, the user-side unit 10 and the heat source-side unit 20 may be formed to have different heights. For example, the housing 11 of the user-side unit 10 and the housing 21 of the heat source-side unit 20 may have different height, width, and depth dimensions. Even in this configuration, the air cooled or heated by the user-side heat exchanger 12 (see Figure 2) can be efficiently blown out from the multiple vertically arranged user-side outlets 16 formed on the user-side unit 10 toward the space to be air-conditioned.

[0074] Figure 6 is a perspective view showing a schematic configuration of an air conditioning system 201 according to another embodiment of the present invention. As shown in Figure 6, the airflow guide 14, which is a user-side airflow guide, may be provided with a reducer 17 and an elbow 18. The reducer 17 and elbow 18 are duct members that adjust the direction of airflow that is cooled or heated by the user-side heat exchanger 12 (see Figure 2) and sent out by the user-side fan 13 (see Figure 2).

[0075] Specifically, the reducer 17 is a pipe fitting with different diameters, and is installed so that the airflow area is narrowed, with the larger diameter portion on the upstream side, i.e., on the housing 11 side of the user-side unit 10, and the smaller diameter portion on the downstream side, i.e., on the side of the space to be air-conditioned. In addition, the inner diameter of the outer end of the reducer 17 is formed to a fitting dimension corresponding to the outer diameter of the elbow 18, so that the elbow 18 can be easily inserted and fixed. By providing the reducer 17, the cooled or heated air can be powerfully blown toward the space to be air-conditioned at an increased airflow velocity.

[0076] The elbow 18 is, for example, a curved pipe fitting that changes the direction of airflow, such as a 45-degree elbow that changes the flow direction by 45 degrees, or a 90-degree elbow that changes the flow direction by 90 degrees. The elbow 18 is attached to the reducer 17 so that the outlet 16 is oriented in a suitable direction, such as upward, downward, left, right, or diagonally, so that the blown air is directed toward the space to be air-conditioned. By providing such an elbow 18, cooled or heated air can be efficiently supplied to a specific space that requires air conditioning. Therefore, high-performance spot air conditioning can be performed.

[0077] Furthermore, although not shown in the figures, the outer surfaces of the reducer 17 and elbow 18 may be provided with insulating members made of, for example, synthetic resin material. By covering the outer periphery of the reducer 17 and elbow 18 with insulating members that have excellent heat insulation properties, condensation during cooling operation is reduced, and highly efficient air conditioning operation with less heat loss can be achieved.

[0078] Although not shown in the diagram, the elbow 18 may be connected to the upstream side, i.e., the housing 11 side of the user unit 10, and the reducer 17 may be connected to the downstream side, i.e., the air-conditioned space side. The air direction guide 14 may also be configured to be connected to only one of the reducer 17 or the elbow 18. Furthermore, other pipe fittings of different diameters that change the airflow area, such as the reducer 17, or other curved pipe fittings that change the direction of airflow, such as the elbow 18, may be further connected to the tip of the reducer 17 or the elbow 18.

[0079] Furthermore, although not shown in the diagram, an extension duct may be connected to the airflow guide 14 to guide the conditioned air to a distant space to be air-conditioned. Specifically, the reducer 17 or elbow 18 may be configured to accommodate an extension duct (not shown). By attaching the extension duct to the reducer 17 or elbow 18 in this way, cooled or heated air can be efficiently supplied to a distant space to be air-conditioned. Therefore, high-performance spot air conditioning can be performed in large spaces.

[0080] Although not shown in the diagram, a flexible duct tube made of a flexible synthetic resin such as polyethylene or flexible polyvinyl chloride may be connected to the tip of the air direction guide 14, for example, the tip of the elbow 18. With this configuration, air can be efficiently delivered to the space where cool or warm air is needed via the flexible duct tube. Therefore, highly efficient spot cooling becomes possible.

[0081] Furthermore, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. [Explanation of Symbols]

[0082] 1, 101, 201 Air conditioning system 10 User Units 11 Housing 12 User side heat exchanger 13. User-side fans 14 Wind Direction Guide 15 Inlet 16 Air outlet 17 Reducer 18 Elbow 20 Heat source side unit 21 Housing 22 Heat source side heat exchanger 23 Heat source side fan 24 Fan Guard 25 Inlet 26 Air outlet 27 Refrigerant Piping 28 Connecting support material 30 mounting bases 31 wheels 32 Drain pan 33 Drain tank space 34 Drain Tank 35 Drain tank stand 36 Tank stand support casters

Claims

1. A user-side unit having a user-side heat exchanger and a user-side fan, A heat source side unit having a heat source side heat exchanger, a heat source side fan, and a compressor, The system comprises a movable frame on which the user-side unit and the heat source-side unit are mounted, An air conditioning system that uses a vapor compression type refrigeration cycle to send air cooled or heated in the heat exchanger on the user side to the space to be air-conditioned using the fan on the user side, The user-side unit and the heat source-side unit are arranged back-to-back such that the user-side outlet from which air is blown out from the user-side fan and the heat source-side outlet from which air is blown out from the heat source-side fan face outwards in opposite directions. An air conditioning system characterized in that the user-side unit is provided with a plurality of user-side fans.

2. The air conditioning device according to claim 1, characterized in that the user-side fans are arranged in multiple rows vertically along one surface of the user-side unit.

3. The air conditioning device according to claim 2, characterized in that two of the user-side fans are provided.

4. The user-side unit is provided with multiple user-side outlets, each corresponding to one of the multiple user-side fans. The air conditioning device according to any one of claims 1 to 3, characterized in that each of the aforementioned user-side air outlets is provided with a user-side airflow guide for adjusting the direction of airflow delivered by the user-side fan.

5. The air conditioning device according to claim 4, characterized in that the user-side fan and the heat source-side fan are propeller fans, and the discharge air velocity of the user-side fan is set to be greater than the discharge air velocity of the heat source-side fan.

6. The air conditioning device according to claim 4, characterized in that the user-side unit and the heat source-side unit are formed to be at the same height and are connected at the top by a connecting support member.

7. The air conditioning device according to claim 4, characterized in that the frame has a drain tank space into which a movable drain tank for storing condensation water generated in the user-side unit or the heat source-side unit can be inserted.

8. The heat source side unit is provided with multiple heat source side fans. The heat source side fans are arranged in multiple rows vertically along one side of the heat source side unit. The heat source side unit is provided with a plurality of heat source side outlets, each corresponding to a plurality of heat source side fans. The air conditioning device according to claim 4, characterized in that each of the heat source side outlets is provided with a heat source side airflow guide for adjusting the direction of airflow delivered by the heat source side fan.

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