JP2022130225A - Air conditioning system - Google Patents

Abstract

To provide an air conditioning system capable of developing good air conditioning effects even when used for spot air conditioning by making a greater temperature difference between a sucked air temperature and a blown air temperature in a use side unit.SOLUTION: An air conditioning system 1 includes: a use side unit 10 having a use side heat exchanger 12 and a use side fan 13; and a heat source side unit 20 having a heat source side heat exchanger 22, a heat source side fan 23, and a compressor, where air conditioning operation is carried out with the usage side unit 10 and the heat source side unit 20 pipe-connected with each other. The number of heat transfer pipe rows in the use side heat exchanger 12 is greater than the number of heat transfer pipe rows in the heat source side heat exchanger 22. Thereby, even when used for spot air conditioning, the air conditioning system can blow out cool air having a comfortable temperature to develop good air conditioning effects, while operating suitably for saving energy.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to an air conditioner that performs air conditioning operation by connecting a user side unit and a heat source side unit by piping, and more particularly to an air conditioner for spot air conditioning in which a user side unit and a heat source side unit are integrated.

Patent Document 1 discloses a user-side unit having a user-side heat exchanger and a user-side fan, and a heat-source-side unit having a heat-source-side heat exchanger, a heat-source-side fan, a compressor, and the like. An air conditioner is disclosed that performs air conditioning operation such as cooling by connecting side units with piping.

In addition, as an air conditioner used for cooling or heating large-scale spaces where it is difficult to install ordinary air conditioners, such as factories, workshops, warehouses, gymnasiums, etc., the heat source side unit and the user side unit are integrated. It is known to perform spot air-conditioning in preparation for the target.

For example, Patent Literature 2 discloses an air conditioner in which a heat source side unit and a user side unit are arranged on one frame. The heat source-side unit and the user-side unit are arranged back-to-back so that their air outlets face outward and their air inlets face inward, and a suction space is provided between the user-side unit and the heat source-side unit. ing.

Japanese Unexamined Patent Application Publication No. 2013-200103 JP 2011-94879 A

By the way, since this type of air conditioner is used for spot air conditioning, it is necessary to increase the temperature difference between the intake air temperature and the blowout air temperature to blow the air cooled to a suitable temperature as far as possible. be.

However, in the conventional air conditioner, during cooling, the temperature difference between the intake air temperature of the user-side unit, that is, the ambient temperature, and the blown air temperature is about 10 degrees Celsius. Therefore, when the ambient temperature rises, there is a problem that the blown air cannot be cooled to an appropriate temperature. For example, if the intake air temperature exceeds 40 degrees, the blowing air temperature cannot be lowered to 30 degrees or less. Therefore, in some cases, a sufficient air-conditioning effect cannot be obtained as a countermeasure against heat stroke in summer when the ambient temperature is extremely high.

The present invention has been made in view of the above circumstances, and its object is to increase the temperature difference between the intake air temperature and the blow-out air temperature of the user side unit so that it can be used for spot air conditioning. To provide an air conditioner suitable for saving energy while obtaining a good air conditioning effect even in the case of

An air conditioner of the present invention comprises a user-side unit having a user-side heat exchanger and a user-side fan, and a heat source-side unit having a heat source-side heat exchanger, a heat source-side fan, and a compressor. An air conditioner for performing air conditioning operation by connecting a unit and the heat source side unit with piping, wherein the number of heat transfer tube rows in the user side heat exchanger is larger than the number of heat transfer tube rows in the heat source side heat exchanger. Characterized by

Further, an air conditioner of the present invention comprises a user-side unit having a user-side heat exchanger and a user-side fan, and a heat source-side unit having a heat source-side heat exchanger, a heat source-side fan, and a compressor, An air conditioner in which a user-side unit and the heat source-side unit are arranged back-to-back on a single frame and pipe-connected so that each outlet faces outward and each suction port faces inward, The number of heat transfer tube rows in the use side heat exchanger is larger than the number of heat transfer tube rows in the heat source side heat exchanger.

According to the air conditioner of the present invention, it comprises a user side unit having a user side heat exchanger and a user side fan, and a heat source side unit having a heat source side heat exchanger, a heat source side fan and a compressor. The number of heat transfer tube rows in the side heat exchanger is greater than the number of heat transfer tube rows in the heat source side heat exchanger. As a result, the ambient air sucked into the user-side unit is blown out from the windward side of the user-side heat exchanger to the leeward side while sufficiently repeating heat exchange. The temperature difference can be increased.

Therefore, the air conditioner can blow out suitable cool air, and exhibits a good air conditioning effect even when used for spot air conditioning. In addition, since the heat source side heat exchanger has a small number of heat transfer tube rows, excellent heat exchange efficiency can be obtained. Therefore, the air conditioner is also excellent in energy saving.

Specifically, during cooling, the temperature difference between the intake air temperature and the blowing air temperature of the user side unit can be set to about 15 degrees. As a result, the temperature of the air blown from the user side unit can be lowered to 25 degrees or less even in a high temperature state such as in summer when the temperature of the intake air exceeds 40 degrees. Therefore, spot air conditioning by an air conditioner is also effective as a countermeasure against heat stroke.

Further, according to the air conditioner of the present invention, the user-side unit and the heat source-side unit are arranged on one frame, and each outlet is directed outward and the inlet is directed inward. They may be arranged back to back. With such a configuration, the air conditioner can be easily moved to the vicinity of a place requiring cooling in a large space such as a factory or warehouse. Therefore, the air cooled to a suitable temperature by the utilization side heat exchanger can be suitably blown to the object to be cooled.

Further, according to the air conditioner of the present invention, the number of heat transfer tube rows in the use side heat exchanger may be twice or more the number of heat transfer tube rows in the heat source side heat exchanger. With such a configuration, for example, even in a high outside air temperature state such as an extremely hot day, the air conditioning apparatus exchanges heat with the user-side heat exchanger to bring the air supplied to the object to be cooled to a suitable temperature. can.

Further, according to the air conditioner of the present invention, the blowing air velocity of the user side fan may be set higher than the blowing air velocity of the heat source side fan. As a result, air cooled to a suitable temperature can be suitably blown toward a distant object to be cooled.

Further, according to the air conditioner of the present invention, the user side fan and the heat source side fan may be propeller fans. As a result, a large amount of air cooled to a suitable temperature can be blown out far away while parts are shared, and spot air-conditioning in a wide space such as a factory can be performed satisfactorily.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows schematic structure of the air conditioner which concerns on embodiment of this invention. Fig. 2 is a perspective view showing the vicinity of the pipe outlet of the air conditioner according to the embodiment of the present invention; 1 is a cross-sectional view showing a schematic configuration of a user-side heat exchanger of an air conditioner according to an embodiment of the present invention; FIG. 1 is a cross-sectional view showing a schematic configuration of a heat source side heat exchanger of an air conditioner according to an embodiment of the present invention; FIG.

Hereinafter, air conditioners according to embodiments of the present invention will be described in detail based on the drawings.
FIG. 1 is a diagram showing a schematic configuration of an air conditioner 1 according to an embodiment of the present invention.
As shown in FIG. 1 , the air conditioner 1 is a device that performs an air conditioning operation, and has a user side unit 10 and a heat source side unit 20 mounted on a pedestal 40 . Specifically, the air conditioner 1 is a movable powerful spot air conditioner in which a user side unit 10 and a heat source side unit 20 are integrated.

The user-side unit 10 is a device that mainly cools or heats the user-side air and supplies it. The user-side unit 10 has a configuration corresponding to an indoor unit of a general package air conditioner.

Specifically, the user-side unit 10 has a housing 11 that is a substantially box-shaped housing made of a metal plate material or the like, and a user-side heat exchanger that is a part that constitutes a refrigeration cycle is housed inside the housing 11 . 12 and a user side fan 13 are provided. This user side fan 13 is a propeller fan, and is rotationally driven by a motor (not shown).

The heat source side unit 20 is a device that mainly releases heat to or absorbs heat from the air on the exhaust side. The heat source side unit 20 has a configuration corresponding to an outdoor unit of a general packaged air conditioner.

Specifically, the heat source side unit 20 has a housing 21 which is a substantially box-shaped housing made of a metal plate material or the like, and a heat source side heat exchanger which is a part constituting a refrigeration cycle inside the housing 21. 22 and a heat source side fan 23 are provided. This heat source side fan 23 is also a propeller fan, and is rotationally driven by a motor (not shown).

The housings 11 and 21 of the user-side unit 10 and the heat-source-side unit 20 are both designed for outdoor installation, and the user-side unit 10 is made with substantially the same specifications as the heat-source-side unit 20 in terms of weather resistance and waterproofness. there is

The user-side heat exchanger 12 of the user-side unit 10 is connected to the heat source-side heat exchanger 22 of the heat source-side unit 20 via refrigerant piping 28 . Specifically, the user-side heat exchanger 12 and the heat source-side heat exchanger 22 include a compressor (not shown) that compresses a low-pressure refrigerant to a high pressure, an expansion valve (not shown) that expands a high-pressure refrigerant to a low pressure, and refrigerant pipes. 28 and other refrigerant pipes (not shown) to form a vapor compression refrigeration cycle circuit. As the refrigerant used in the refrigerating cycle, for example, an HFC refrigerant or the like is adopted.

FIG. 2 is a perspective view showing the vicinity of the pipe outlet 27 of the air conditioner 1. As shown in FIG.
As shown in FIG. 2, the housing 21 of the heat source side unit 20 is formed with a pipe outlet 27 through which a refrigerant pipe 28 connected to the user side unit 10 is inserted. The piping outlet 27 is, for example, a knockout hole. The pipe outlet 27 is closed by a pipe outlet block plate 30 with the refrigerant pipe 28 inserted therein.

1 and 2, similarly to the heat source side unit 20, the housing 11 of the user side unit 10 is formed with a pipe outlet 17 through which a refrigerant pipe 28 connected to the heat source side unit 20 is inserted. there is The piping outlet 17 is, for example, a knockout hole. The pipe outlet 17 is closed by a pipe outlet block plate 30 with the refrigerant pipe 28 inserted therein.

Referring to FIG. 1, a housing 11 of a user-side unit 10 is formed with a suction port 15, which is an opening for sucking ambient air, and a blowout port 16, which is an opening for blowing out air. The suction port 15 is provided with a user-side heat exchanger 12 that exchanges heat between the air sucked from the surroundings and the refrigerant. As a result, for example, during cooling operation, the air sucked from the surroundings is cooled by the refrigerant that evaporates in the user-side heat exchanger 12 .

Further, the air outlet 16 is provided with a wind direction guide 14 for adjusting the flow direction of the air sent by the user side fan 13 . The wind direction guide 14 has an outer peripheral portion that surrounds the outer periphery of the user-side fan 13 and has, for example, a substantially cylindrical shape.

The inside surrounded by the outer peripheral portion of the wind direction guide 14 is an opening leading to a blowout port 16 through which air flows. A variable wind direction adjusting plate (not shown) for adjusting the flow of air is provided inside the wind direction guide 14 . With such a configuration, the air cooled or heated by the utilization side heat exchanger 12 can be efficiently flowed toward the work space that requires it.

The housing 21 of the heat source side unit 20 is formed with a suction port 25 that is an opening for sucking air and a blowout port 26 that is an opening for blowing out air. The suction port 25 is provided with a heat source side heat exchanger 22 that exchanges heat between the air sucked from the surroundings and the refrigerant. As a result, for example, during 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 exchanges heat with the refrigerant in the heat source side heat exchanger 22 and is heated.

Further, the air outlet 26 is provided with a wind direction guide 24 for adjusting the blowing direction of the air sent by the heat source side fan 23 . The wind direction guide 24 has, for example, a substantially rectangular outer frame surrounding the heat source side fan 23, and is made of a metal plate material, a resin plate material, or the like.

The mount 40 is a stand that integrally supports the user side unit 10 and the heat source side unit 20 . The pedestal 40 is made of, for example, angle steel, channel steel, other steel materials, or the like. A base 41 is formed below the mount 40 and has a substantially rectangular frame-like outer periphery when viewed from above. The heat source side unit 20 is fixed to the top of the base 41 .

A user-side unit installation table 42 on which the user-side unit 10 is installed is formed on the gantry 40 . The user-side unit installation table 42 is formed to protrude upward from the top of the base 41 so that the bottom of the user-side unit 10 can be supported at a position higher than the bottom of the heat source-side unit 20 .

By providing the user-side unit installation table 42 on the upper part of the base 41, the user-side unit 10 is fixed at a high position. Since the user-side unit 10 is provided at a high position in this way, the position of the blow-out port 16 of the user-side unit 10 is raised, and cold air and warm air for air conditioning can be blown widely and efficiently to the work space. can be done.

A drain pan 43 is provided on the upper portion of the user-side unit installation table 42 . The drain pan 43 is a member for receiving dripping water adhering to the user-side heat exchanger 12 of the user-side unit 10 and draining it to a water pipe (not shown). By providing the drain pan 43, water dripping from the user-side heat exchanger 12 of the user-side unit 10 can be collected and suitably drained, and the water can be prevented from scattering in the working space.

Wheels 44 are provided near corners of the lower portion of the base 41 . The wheels 44 are, for example, casters having rubber wheels or the like, and may be a fixed wheel that can move in a predetermined direction on one end side and a flexible wheel that can change direction on the other end side. By providing the wheels 44 , the gantry 40 is configured to be movable while integrally supporting the user side unit 10 and the heat source side unit 20 .

The user-side unit 10 and the heat-source-side unit 20 are provided on the mount 40 such that the suction port 15 and the suction port 25 for sucking air are opposed to each other. That is, the user-side unit 10 and the heat source-side unit 20 are arranged back-to-back so that the user-side heat exchanger 12 side and the heat source-side heat exchanger 22 side face each other.

In other words, the user-side unit 10 and the heat source-side unit 20 are arranged so that the air outlet 16 of the user-side unit 10 and the air outlet 26 of the heat source-side unit 20 face outward so that they blow air in opposite directions. It is

As described above, the user-side unit 10 and the heat-source-side unit 20 face the suction port 15 and the suction port 25 inward, and the air outlet 16 and the air outlet 26 are directed in opposite directions so that air is blown out in opposite directions. By arranging in such a manner, efficient air conditioning is realized for large-scale factories, distribution warehouses, and the like.

That is, the cooled or heated air can be efficiently blown from the outlet 16 of the user unit 10 to the working area to be air-conditioned. Then, exhaust heat air for air conditioning can be discharged to a space away from the space requiring air conditioning from the blowout port 26 of the heat source side unit 20 facing the opposite side to the blowout port 16 of the user side unit 10. can.

FIG. 3 is a cross-sectional view showing a schematic configuration of the utilization side heat exchanger 12. As shown in FIG. FIG. 4 is a cross-sectional view showing a schematic configuration of the heat source side heat exchanger 22. As shown in FIG.
3 and 4, the utilization side heat exchanger 12 is formed so that the number of heat transfer tube rows is greater than the number of heat transfer tube rows of the heat source side heat exchanger 22 . For example, the number of heat transfer tube rows in the utilization side heat exchanger 12 is preferably twice or more the number of heat transfer tube rows in the heat source side heat exchanger 22 . Specifically, in this embodiment, the heat source side heat exchanger 22 has two rows of heat transfer tubes (see FIG. 4), whereas the utilization side heat exchanger 12 has four rows of heat transfer tubes. (see Figure 3).

Specifically, the utilization-side heat exchanger 12 and the heat source-side heat exchanger 22 are fin-and-tube heat exchangers, and a large number of heat exchangers are arranged so as to be stacked substantially horizontally at predetermined intervals. It has a replacement fin F. In the heat exchange fins F, heat transfer tubes extending in the horizontal direction substantially perpendicular to the heat exchange fins F are arranged in a plurality of stages in the vertical direction and in a plurality of rows in the horizontal direction substantially along the heat exchange fins F. P is formed.

The utilization side heat exchanger 12 is provided with four rows of heat transfer tube groups P, that is, a heat transfer tube row P11, a heat transfer tube row P12, a heat transfer tube row P13, and a heat transfer tube row P14. is provided with two rows of heat transfer tube groups P, that is, a heat transfer tube row P21 and a heat transfer tube row P22.

In other words, the utilization-side heat exchanger 12 is provided with approximately four rows of heat transfer tubes P11, P12, P13, and P14 in the blowing direction A indicated by the arrows. Two rows of heat transfer tube rows P21 and P22 are provided in the blowing direction B indicated by .

The refrigerant entering the heat exchanger 12 first flows in the heat transfer tube array P11 in the horizontal direction and the vertical direction, which is the extending direction of the heat transfer tube array P, and then flows through the heat transfer tube arrays P12 to P14 in sequence. Become. The utilization-side heat exchanger 12 may be formed so that the refrigerant flows in a branched manner through the heat transfer tube groups P of the heat transfer tube arrays P11 to P14.

Likewise, the refrigerant in the heat source side heat exchanger 22 first flows in the horizontal direction and the vertical direction, which are the extending directions of the heat transfer tube group P, in the heat transfer tube row P21, and then flows through the heat transfer tube row P22. . Further, the heat source side heat exchanger 22 may be formed so that the refrigerant flows in a branched manner through the heat transfer tube groups P of the heat transfer tube lines P21 and P22.

With reference to FIG. 1, with the above configuration, ambient air sucked into user-side unit 10 is blown out from the windward side of user-side heat exchanger 12 toward the leeward side while sufficiently repeating heat exchange. As a result, for example, during cooling, the temperature difference between the intake air temperature and the blowout air temperature of the user unit 10 can be made about 15 degrees.

As a result, for example, even if the temperature of the intake air exceeds 40 degrees on a hot day or the like, the temperature of the blown air can be lowered to 25 degrees or less. Therefore, the air conditioner 1 can send cool air of a suitable temperature to the user, which is also effective as a countermeasure against heat stroke, which was difficult with conventional air conditioners.

In addition, since the number of heat transfer tube rows in the heat source side heat exchanger 22 is small, unlike the case where the number of heat transfer tube rows in the heat source side heat exchanger 22 is increased, there is no concern that power consumption during cooling will be affected. That is, the heat source side heat exchanger 22 having a small number of heat transfer tube rows provides excellent heat exchange efficiency. Therefore, the air conditioning apparatus 1 can supply air cooled to a suitable temperature even if the ambient temperature is high, and has low power consumption and excellent energy saving.

Moreover, in the air conditioner 1 according to the present embodiment, a particularly powerful user-side fan 13 is mounted. Specifically, the user side fan 13 is installed so as to have a greater blowing capacity than the heat source side fan 23 . That is, the blowing air velocity of the user side fan 13 may be set higher than the blowing air velocity of the heat source side fan 23 . For example, the user-side fan 13 has a powerful air-blowing ability to blow air from the air outlet 16 at a wind speed of 5 m/s.

In addition, since the user-side fan 13 is a propeller fan like the heat-source-side fan 23, it is possible to use common parts, and in a large-scale workshop such as a factory, the airflow is strong in a straight line and the temperature difference is greater than that of the surrounding air. It can send a cold blast over long distances. Therefore, it is possible to efficiently cool or heat only the work space targeting the space where the user works.

As described above, in the present embodiment, the number of heat transfer tube rows in the utilization side heat exchanger 12 is four, and the number of heat transfer tube rows in the heat source side heat exchanger 22 is two. And the number of heat transfer tube rows of the heat source side heat exchanger 22 is not limited to this.

For example, when the number of heat transfer tube rows in the heat source side heat exchanger 22 is two, the number of heat transfer tube rows in the utilization side heat exchanger 12 should be three or more. Further, for example, when the number of heat transfer tube rows in the heat source side heat exchanger 22 is three, the number of heat transfer tube rows in the utilization side heat exchanger 12 should be four or more.
Further, instead of increasing the number of heat transfer tube rows for the entire utilization side heat exchanger 12, a configuration may be adopted in which the number of heat transfer tube rows is partially increased.

In the above description, it can be seen that the housing 11 of the user side unit 10 has substantially the same outdoor installation specification as the housing 21 of the heat source side unit 20, but the size and shape of the housing 11 and the housing 21 are limited to the same. is not. The use side heat exchanger 12 and the heat source side heat exchanger 22 may also have different sizes and shapes.

For example, from the viewpoint of energy saving, it is preferable that the number of heat transfer tube rows in the heat source side heat exchanger 22 is small. Therefore, in order to increase the heat exchange efficiency of the heat source side heat exchanger 22, the air blowing area, that is, the area seen from the air blowing direction B, may be configured to be large. That is, the air passage area of the heat source side heat exchanger 22 may be larger than that of the utilization side heat exchanger 12 without increasing the number of heat transfer tube rows of the heat source side heat exchanger 22 . For example, the height dimension of the heat source side heat exchanger 22 may be larger than the height dimension of the utilization side heat exchanger 12 when viewed from the blowing directions A and B.

Also, the heat source side fans 23 may be provided in a larger number than the user side fans 13 . For example, two heat source side fans 23 may be provided. With such a configuration as well, it is possible to obtain the air conditioner 1 that is capable of blowing out suitable cold air even when the ambient temperature is high and that is excellent in energy saving.

Further, the air conditioner 1 according to the above-described embodiment has a movable configuration in which the user-side unit 10 and the heat source-side unit 20 are mounted on a common pedestal 40 and integrated. not to be The air conditioner 1 may be configured such that the user side unit 10 and the heat source side unit 20 are installed at different positions.

Even if the user-side unit 10 and the heat source-side unit 20 are not integrated and are installed at separate positions, the number of heat transfer tube rows in the user-side heat exchanger 12 is the same as that of the heat source-side heat exchanger 22. With a configuration in which the number of rows of heat tubes is greater than the number of arrays, the intake air can be cooled to a low temperature with a large temperature difference. As a result, it is possible to obtain the air conditioner 1 that is excellent in air conditioning performance and energy saving performance that can efficiently send suitably cooled low-temperature air to the object to be cooled.

It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

1 Air conditioner 10 User side unit 11 Housing 12 User side heat exchanger 13 User side fan 14 Wind direction guide 15 Suction port 16 Air outlet 17 Piping outlet 20 Heat source side unit 21 Housing 22 Heat source side heat exchanger 23 Heat source side fan 24 Wind direction guide 25 Suction port 26 Air outlet 27 Piping outlet 28 Refrigerant pipe 30 Piping outlet blocking plate 40 Frame 41 Base 42 User side unit installation base 43 Drain pan 44 Wheel F Heat exchange fin P Group of heat transfer tubes P11, P12, P13, P14 Heat transfer tube row P21, P22 Heat transfer tube row A Blowing direction B Blowing direction

Claims (5)

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;
An air conditioner that performs air conditioning operation by connecting the user side unit and the heat source side unit with piping,
An air conditioner, wherein the number of heat transfer tube rows in the use side heat exchanger is greater than the number of heat transfer tube rows in the heat source side heat exchanger. 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;
An air conditioner in which the user-side unit and the heat source-side unit are arranged back-to-back on a single frame and pipe-connected so that the air outlet of each unit faces outward and the suction port faces inward. ,
An air conditioner, wherein the number of heat transfer tube rows in the use side heat exchanger is greater than the number of heat transfer tube rows in the heat source side heat exchanger. 3. The air conditioner according to claim 1, wherein the number of heat transfer tube rows in the use side heat exchanger is two or more times the number of heat transfer tube rows in the heat source side heat exchanger. 4. The air conditioner according to any one of claims 1 to 3, wherein the blowing air velocity of the user side fan is set higher than the blowing air velocity of the heat source side fan. The air conditioner according to any one of claims 1 to 4, wherein the user side fan and the heat source side fan are propeller fans.

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