JP2010038500A - Agricultural air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an agricultural air conditioner, suitable for air-conditioning the interior of a wide plants growing house. <P>SOLUTION: This agricultural air conditioner includes an indoor unit 50 installed in a plastic greenhouse and an outdoor unit 10 connected to the indoor unit 50 by a refrigerant pipe, wherein the indoor unit 50 includes a case storing a blowing fan and an indoor heat exchanger, a back opening part 18 for exposing the indoor heat exchanger is formed on the back face of the case, a front opening part for blowing out the conditioned air sucked from the back opening part 18 by the blowing fan and passed through the indoor heat exchanger is formed on the front of the case, and a flexible duct 61 is fitted to the front opening part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an agricultural air conditioner for air-conditioning a house for plant cultivation (a greenhouse, a plastic house, etc.) used for cultivation of plants and the like.

Conventionally, what uses a greenhouse boiler is known as a thing for heating the inside of the plant cultivation house for agriculture. This greenhouse boiler burns heavy oil to warm the inside of the plant cultivation house. Moreover, as a method of heating without using a boiler, a method using an agricultural air conditioner that performs air-conditioning operation using electricity can be considered.
By the way, in air conditioners for kitchens or factories that are not for agricultural use, an air suction port is formed in the lower exterior panel, and an air outlet is formed in the center of the front exterior panel. There is one in which a duct outlet for connecting a duct is formed (for example, see Patent Document 1).
Japanese Patent No. 2698087

In general, greenhouses targeted for agricultural air conditioners are expected to grow more plants by ensuring a wide acreage, and the floor area of the living room space targeted by ordinary air conditioners Wide compared. For this reason, it may be possible to use a duct in order to air-condition a wide space uniformly.
However, since the above-described air conditioner for a kitchen or factory has a ceiling installation configuration, it is not suitable for installation in a relatively fragile greenhouse. In addition, since the air is sucked in from the lower surface and discharged from the left and right sides of the front surface, the ventilation path in the apparatus is bent and the air resistance is relatively increased, and the layout space of the heat exchanger is restricted, the air flow rate and There are various problems that are not applicable to agricultural air conditioners, such as limited heat exchange capacity.

  Then, the objective of this invention is providing the air conditioning apparatus for agriculture suitable for air-conditioning the inside of a large plant cultivation house.

  In order to solve the above-described problem, the present invention includes an indoor unit installed in a plant cultivation house, and an outdoor unit connected to the indoor unit by a refrigerant pipe, the indoor unit including a blower fan and an indoor unit A case for housing the heat exchanger is provided, and a rear opening for exposing the indoor heat exchanger is formed on the back of the case, and the front of the case is sucked from the back opening by the blower fan. A front opening that blows conditioned air that has passed through the indoor heat exchanger is formed, and a flexible duct through which conditioned air blown from the front opening passes is attached to the front opening. Apply air conditioner.

  In the agricultural air conditioning apparatus according to the present invention, a plurality of the front openings are formed at intervals, and the flexible ducts are respectively attached to the front openings.

  According to the present invention, it includes an indoor unit installed in a plant cultivation house and an outdoor unit connected to the indoor unit by a refrigerant pipe, and the indoor unit houses a blower fan and an indoor heat exchanger. A rear opening for exposing the indoor heat exchanger is formed on the back of the case, and the indoor heat exchanger is sucked into the front of the case from the back opening by the blower fan. A front opening that blows out the conditioned air that has passed is formed, and a flexible duct through which the conditioned air blown out from the front opening passes is attached to the front opening, so that the blowing ability itself can be increased, and The flexible duct makes it possible to efficiently create a temperature environment suitable for plant cultivation.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic view showing a state in which an agricultural air conditioner (agricultural air conditioner) 6 according to the present embodiment is installed in a vinyl house (plant cultivation house) 1 used for cultivation of plants and the like.
The greenhouse 1 is partitioned as a greenhouse by an outer wall 4 that partitions the outer space 2 and the inner space 3, and promotes cultivation of the plant 5 by maintaining the interior at a predetermined temperature. For the outer wall 4, a synthetic resin having excellent heat insulation is used.

  A plurality (two in this embodiment) of air conditioners 6 for agriculture are installed in the greenhouse 1 in order to maintain the inside space 3 at a predetermined temperature. The agricultural air conditioner 6 includes an outdoor unit 10 installed in the outer space 2 of the greenhouse 1 and an indoor unit 50 installed in the inner space 3. The outdoor unit 10 and the indoor unit 50 are the greenhouse. 1 is connected by a refrigerant pipe 7 piped in such a manner as to penetrate through the outer wall 4 of one.

FIG. 2 is a perspective view showing an appearance of the outdoor unit 10 used for the agricultural air conditioner 6. FIG. 3 is an exploded perspective view showing the configuration of the equipment housed in the unit case 11 of the outdoor unit 10.
As shown in FIG. 2, the outdoor unit 10 includes a unit case 11 having a substantially rectangular parallelepiped box shape. The unit case 11 includes a bottom plate 12, a top plate 13, a left front panel 14a, a right front panel 14b, and an outer plate 15. Two blower fans 34 and 34, which will be described later, are arranged in parallel vertically on the inside of the left front panel 14a. A front opening (blowing) corresponding to each of the blower fans 34 and 34 is provided on the front surface of the panel 14a. (Openings functioning as outlets) 16, 16 are formed, and the front openings 16, 16 are covered with fan guards 17, 17.

  The interior of the unit case 11 is defined in left and right chambers by a partition plate 31 shown in FIG. The left chamber is used as a heat exchange chamber 35 in which the outdoor heat exchanger 32 is accommodated, and the right chamber is used as a machine room 40. The machine room 40 accommodates equipment constituting a refrigerant circuit such as a compressor 41 disposed below and an accumulator 44 disposed in the vicinity of the compressor 41. An electrical box 47 is disposed below the machine room 40. The electrical box 47 accommodates a power transformer 48 for supplying power to each part of the outdoor unit 10. Further, the machine room 40 is provided with a pipe connection portion 38 that extends from the outdoor heat exchanger 32 and connects the refrigerant pipe.

As shown in FIG. 3, the outdoor heat exchanger 32 is formed in a shape that is bent in a substantially L shape in a plan view, and the short portion 32 a of the outdoor heat exchanger 32 is a left side surface of the heat exchange chamber 35. And the longitudinal portion 32b of the outdoor heat exchanger 32 is assembled to the unit case 11 along the back surface of the heat exchange chamber 35. Here, on the side surface and back surface of the unit case 11 (more specifically, substantially the entire side surface and back surface of the heat exchange chamber 35), a back surface opening (opening functioning as a suction port) 18 opens from the side surface to the back surface. The outdoor heat exchanger 32 is exposed (exposed) to the outside through the rear opening 18. Further, a fingered 19 which is a mesh plate member through which air can flow is attached to the back surface opening 18, and the fins of the outdoor heat exchanger 32 are covered from the outside by the fingered 19.
Thus, by exposing (exposing) the outdoor heat exchanger 32 from the left side surface and the back surface of the unit case 11, a large contact area with the outside air can be secured and the heat exchange rate can be increased. Moreover, in this structure, the outdoor heat exchanger 32 is formed in the height substantially the same as the case height of the unit case 11, and, thereby, the outdoor heat exchanger is extended up and down on the left side surface and the back surface of the unit case 11. The heat exchange area which occupies the whole unit case 11 can be ensured more widely.

The unit case 11 is provided with a motor base 46 extending vertically between the outdoor heat exchanger 32 and the left front panel 14a, and the air in the outdoor unit 10 is transferred to the motor base 46 from the front opening 16. , 16 are attached to the front of the case through two blower fans 34. In this case, the fan motors 33, 33 that drive the blower fans 34, 34 are arranged in a line in the vertical direction with the motor shaft facing the front of the case with respect to the motor base 46, and rotate by receiving power supply from the power transformer 48.
That is, when the blower fans 34 are driven, outside air is sucked from the rear opening 18 of the unit case 11, passes through the outdoor heat exchanger 32, and is heat-exchanged. Are respectively discharged from the front openings 16 and 16. In the present configuration, since the blower fans 34 are arranged above and below, the upper air is forcedly exhausted by the upper blower fan 34, and the lower air is forcedly exhausted by the lower blower fan 34, whereby the outdoor heat exchanger 32. The heat exchange is forcibly promoted, and heat generated from the compressor 41 and the power transformer 48 accommodated in the machine room 40 is released to the outside of the outdoor unit 10. In addition, a propeller fan type is applied to these blower fans 34, and the blower capacity can be increased as compared with a sirocco fan having the same motor capacity.

  Since the outdoor unit 10 has a specification to be installed outdoors, the unit case 11 has a waterproof structure that does not affect the operation even when exposed to rainwater or the like. Further, the fan motors 33 and 33 and the electrical box 47 accommodated in the interior are also waterproof.

  The outer shape of the outdoor unit 10 is configured such that the length in the width direction is longer than the length in the depth direction of the outdoor unit 10 in order to ensure the largest possible rear surface area for taking in air. In addition, since the entire rear surface is composed of the outdoor heat exchanger 32 (exposed from the back), the depth direction is shortened compared to the structure in which the outdoor heat exchanger 32 is included in the outdoor unit 10. The installation area in the depth direction is not increased.

  The outdoor unit 10 is substantially the same as an outdoor unit used for a general-purpose air conditioner that air-conditions a living room (at least main components are an outdoor heat exchanger 32, a unit case 11, a compressor 41, an accumulator 44, and a fan. The motor 33, the blower fan 34, and the electrical box 47 are the same). That is, the outdoor unit 10 can be used in the same configuration for both the general-purpose air conditioner and the agricultural air-conditioner 6, and can be used as a general-purpose outdoor unit as the agricultural air-conditioner 6. The total cost can be reduced.

FIG. 4 is a diagram showing the indoor unit 50 used for the agricultural air conditioner 6. FIG. 5 is a plan view of the indoor unit 50.
This indoor unit 50 is shared with the above-described outdoor unit 10 (that is, the same outdoor unit as that used for a general-purpose air conditioner) and can be used (at least the main part, the indoor heat exchanger 52). (Same as the outdoor heat exchanger 32), the unit case 11, the fan motor 33, and the blower fan 34 are the same), and its external configuration and external shape are substantially the same as those of the outdoor unit 10 (see FIG. 2). It is. In the following description, components that are used in the indoor unit 50 and that are the same as the components of the outdoor unit 10 will be described with the same reference numerals.

  The indoor unit 50 includes a unit case 11 having a waterproof structure. The interior of the indoor unit 50 is defined by left and right chambers by a partition plate 31 in the same manner as the outdoor unit 10. The left chamber is a heat exchange chamber 53 in which an indoor heat exchanger 52 (the same parts as the outdoor heat exchanger 32) is accommodated, and the right chamber is a machine chamber 54. In the upper part of the machine room 54, a waterproof electrical box 56 is disposed. The machine room 54 is provided with a pipe connection portion 58 that extends from the indoor heat exchanger 52 and connects the refrigerant pipe. 4 shows a state in which the right front panel 14b, the top plate 13, and the fingered 19 are removed for convenience of explanation.

The indoor heat exchanger 52 is formed by applying the same components as the outdoor heat exchanger 32 and bent in a substantially L shape in plan view in the same manner as described above, and the short portion 52a of the indoor heat exchanger 52 is formed. The unit case 11 is assembled along the left side surface of the heat exchange chamber 53 and the longitudinal portion 52 b of the indoor heat exchanger 52 along the back surface of the heat exchange chamber 53. The unit case 11 is also formed with a back opening 18 that opens to the side and back of the unit case 11, and the back opening 18 is attached to the unit case 11 when the indoor heat exchanger 52 is assembled to the unit case 11. The outdoor heat exchanger 32 is exposed (exposed) to the outside.
That is, the indoor heat exchanger 52 is exposed from the left side surface and the back surface of the unit case 11, thereby ensuring a wide contact area with the outside air (the air in the house 1) and improving the heat exchange efficiency. It is possible to secure a wide air intake port (= rear opening 18) of the indoor unit 50. In addition, since the indoor heat exchanger 52 and the outdoor heat exchanger 32 have the same shape and the same size, it is easy to balance the amount of heat exchange between the room and the outside, and the layout is advantageous for improving energy consumption efficiency. Can be.

In addition, the fan motors 33 and 33 and the propeller fan type blower fans 34 and 34 provided in the vicinity of the indoor heat exchanger 52 are also connected to the outdoor unit 10 via the motor base 46 in the unit case 11 of the indoor unit 50. Front opening portions (opening portions functioning as blowout ports) 16 and 16 that are attached with the same structure and correspond to each of the blower fans 34 and 34 are formed.
These two fan motors 33, 33 are rotated by receiving power supply from the electrical box 56, respectively, and drive the blower fans 34, 34. When the blower fans 34 and 34 are driven, outside air is sucked from the rear opening 18 of the unit case 11, passes through the indoor heat exchanger 52, exchanges heat, and the heat-exchanged air (also referred to as conditioned air). Are discharged from the front openings 16, 16 of the unit case 11, respectively. Also in this indoor unit 50, since the blower fans 34 are arranged vertically, heat exchange in the outdoor heat exchanger 32 can be performed efficiently, the ventilation path in the unit can be made straight, and the blower fan 34 can be made. , 34 is a propeller fan type, so that the air blowing capacity can be increased as compared with a sirocco fan having the same motor capacity.

Moreover, the flexible ducts 61 and 61 are each attached to the front opening parts 16 and 16 of the unit case 11 at the indoor unit 50 of this structure (refer FIG. 4, FIG. 5). The flexible ducts 61 and 61 are ducts that can be freely bent and stretched and contracted. In this embodiment, round ducts having substantially the same diameter as the round front openings 16 and 16 are applied. .
The flexible ducts 61, 61 have flange portions 62, 62 at the base end portion, and a screw hole (not shown) for screwing the flange portion 62 is formed in the unit case 11 of the indoor unit 50. The part 62 is fastened to the unit case 11 with screws. FIG. 4 shows a state where the flexible ducts 61 and 61 are removed.
Thus, by connecting the flexible ducts 61 and 61 to the front openings 16 and 16 of the indoor unit 50, all the conditioned air heat-exchanged by the indoor heat exchanger 52 is passed through the flexible ducts 61 and 61 into the greenhouse 1. Can be supplied. Since the flexible ducts 61 and 61 have a degree of freedom in adjustment in the bending direction and length, the degree of freedom in the supply position of the conditioned air and the blowing direction can be improved.

  By the way, it is desired that the greenhouse 1 targeted by the agricultural air conditioner 6 grows more plants 5 by securing a large planting area. Large compared to the floor space. Therefore, the agricultural air conditioner 6 is required to be suitable for air-conditioning a wide air-conditioned space. On the other hand, the indoor unit 50 of the agricultural air conditioner 6 is not problematic in terms of its appearance and loudness compared to an indoor unit installed in a living room space (including a kitchen or a factory). Furthermore, unlike an indoor unit installed in the living room space, water is splashed by watering or the like performed in the house, so it is necessary to have a waterproof structure.

Therefore, unlike an indoor unit installed in a living room space, it is not necessary to enhance the appearance by adopting a structure that sucks indoor air from the lower surface or front surface and blows it out from the front surface.
Moreover, it is difficult to increase the heat exchange area of the indoor heat exchanger in the structure in which air is sucked in from the lower surface or the front surface and blown out from the front surface. That is, unlike the structure in which the heat exchanger is exposed outside the unit case, the indoor heat exchanger must be included in the unit case, so that the heat exchanger becomes small. In other words, in order to ensure the same heat exchange area, the outer shape of the unit case must be increased, and in order to increase the size, a dedicated design as the agricultural air conditioner 6 is required.
Furthermore, it is not necessary to use a silent fan such as a sirocco fan installed in a living room, and a blower fan 34 that can suck in / out a large amount of air even if the sound is somewhat loud is used. Is a good idea.
Furthermore, since the outdoor unit is configured with a waterproof structure, a dedicated design for the waterproof structure is not required, and there is no problem even if water is applied to the indoor unit 50 by watering or the like.

  Therefore, the indoor unit 50 is made as common as possible with the components of the outdoor unit 10, thereby reducing the air resistance and ensuring a wide heat exchange area by sucking from the rear opening 18 and blowing out from the front surface. The air blowing capacity can be increased by using the propeller fan type air blowing fan 34, and the unit case 11, the electrical box 56, and the fan motor 33 have a waterproof structure in which the original outdoor unit 10 is configured. In addition, since it is applied to the indoor unit 50 of the agricultural air conditioner 6, it is possible to eliminate the need for a dedicated design related to component arrangement, waterproof structure, and the like.

  In addition, since the flexible ducts 61 and 61 are connected to the front openings 16 and 16 of the indoor unit 50, a large volume of conditioned air blown by the propeller fan-type blower fan 34 is passed through the flexible ducts 61 and 61 at various positions and It can be blown out from the blowing direction. In addition, the flexible ducts 61 and 61 can be laid out on the ground or suspended from the ceiling, so that various layouts are possible. Therefore, the degree of freedom of adjustment of the final air outlet of conditioned air is increased, and even in an air conditioner that uses air that is difficult to blow out high-temperature conditioned air, such as a greenhouse boiler, a large conditioned space can be efficiently air-conditioned. The temperature environment suitable for plant cultivation can be quickly and appropriately created while harmonizing and saving energy.

  Moreover, since the outdoor unit 10 and the unit case 11 are made common in the indoor unit 50 and the area of the rear surface for taking in air is as large as possible, the length in the width direction is the same as that of the outdoor unit 10. Is long. That is, the length in the width direction of the indoor unit 50 is longer than the length in the depth direction. Further, since the entire rear surface is constituted by the indoor heat exchanger 52, the indoor unit is compared with a structure in which the indoor heat exchanger 52 is accommodated inside the indoor unit 50 as in an indoor unit installed in a living room space. The depth direction of 50 is configured to be shorter.

  The indoor unit 50 is shared based on the outdoor unit 10, but unlike the outdoor unit 10, the compressor 41 and the accumulator 44 are not provided as shown in FIG. 4. This is because the compressor 41 and the accumulator 44 are installed in the outdoor unit 10 and need not be further provided in the indoor unit 50 as a refrigerant circuit. In this case, the indoor unit 50 can be reduced in size by not installing the compressor 41 and the accumulator 44. However, in order to share the other parts of the outdoor unit 10 and the indoor unit 50, the same unit The case 11 is used to have the same outer shape.

  In addition, in the interior of the indoor unit 50, for example, when the installation positions of the indoor unit 50 and the outdoor unit 10 are close, a receiver tank (not shown) is installed in a space where the compressor 41 and the accumulator 44 are not installed. It is installed. Thereby, this empty space can be used effectively.

  Next, adjustment of the flexible ducts 61 and 61 of the agricultural air conditioner 6 will be described. As shown in FIG. 1, in the inner space 3 of the greenhouse 1, a plurality of rows of cultivation spaces 70 (for example, cocoons) extending in a strip shape are provided with intervals of work passages. ing. When two agricultural air conditioners 6 are installed in a rectangular parallelepiped greenhouse 1, the corner having the longest distance between the corners of the four corners 1a, 1b, 1c, and 1d of the greenhouse 1 is used. Indoor units 50 and 50 of each agricultural air conditioner 6 are installed in the vicinity of 1b and 1d. Of course, the indoor units 50, 50 may be installed in the vicinity of the corners 1a, 1c instead of this layout. That is, two indoor units 50 are installed diagonally in the greenhouse 1.

When the indoor units 50, 50 are installed diagonally (near the corners 1b, 1d), as shown in FIG. 1, when viewed from above, a pair of upper and lower flexible ducts 61 of the indoor unit 50 installed near the corner 1b. Are laid out toward the diagonal (corner 1d side), and similarly, the pair of upper and lower flexible ducts 61 of the indoor unit 50 installed in the vicinity of the corner 1d is directed toward the diagonal (corner 1b side). Laid out. Thereby, even when the indoor units 50 and 50 are arranged close to each other along the rear wall 4 of the greenhouse 1, conditioned air is blown out from the indoor units 50 and 50 toward the center of the greenhouse 1 in a top view. In addition, it is possible to eliminate the deviation of the room temperature in the top view (horizontal view).
In a side view, as shown in FIG. 6, the upper flexible duct 61 of the indoor units 50, 50 is slightly upward, and the lower flexible duct 61 is drawn on the ground or the like so as to harmonize with the vicinity of the ground. Blow out the air. Thereby, conditioned air can be blown out into the upper space and the lower space of the greenhouse 1, and the uneven indoor temperature in the vertical direction can be eliminated. Thereby, the inner space 3 of the greenhouse 1 can be air-conditioned uniformly.

Also, in the greenhouse 1, the cultivation height may be changed depending on the plant 5 and the cultivation method. In short, when growing the plant 5 near the ground (for example, cucumber, radish, lettuce), When growing plants 5 on a height of a cultivation stand (for example, cocoons) and when growing plants 5 on a plant cultivation shelf that is about the height of a person (for example, vine shrubs such as strawberries, pears, apples, etc.) Plant).
In this structure, it is also possible to adjust the direction and length of the flexible duct 61 according to the cultivation height of such a plant 5, and to create the desired temperature distribution environment suitable for cultivation of the plant 5. Specifically, when growing the plant 5 in the vicinity of the ground, adjusting the direction and length of the flexible duct 61 to make the temperature distribution in the vicinity of the ground appropriate, and growing the plant 5 at the height of a person's waist In the case of adjusting the orientation and length of the flexible duct 61 to make the temperature distribution appropriate based on the height of the person's waist, and growing the plant 5 at the height of the person's head, For example, it is adjusted to the direction and length of the flexible duct 61 that makes the temperature distribution appropriate based on the height above the human head.

As described above, according to the present embodiment, the indoor unit 50 is structured to be sucked from the rear opening 18 and blown out from the front openings 16, 16, and the blower fan 34 is made to be a propeller fan type. Since the capacity itself can be enhanced and the flexible duct 61 through which the conditioned air blown out from the front openings 16 and 16 passes is attached, the inside of the greenhouse 1 can be air-conditioned both uniformly and in a spot by the flexible duct 61. It is possible to efficiently create a temperature environment suitable for plant cultivation.
Moreover, since the flexible duct 61 is provided, the orientation of the front openings 16 and 16 of the indoor unit 50 is not restricted, and it is appropriate to place the indoor unit 50 close to the outer wall 4 of the greenhouse 1 as shown in FIG. Temperature environment can be created and the degree of freedom of arrangement of the indoor unit 50 can be improved. Moreover, even when the space of the greenhouse 1 is wide or the ceiling is high, an appropriate temperature environment can be efficiently created by changing the direction and length of the flexible duct 61 according to this space. Can do. Moreover, even when the cultivation height changes by changing the type of the plant 5 to be cultivated, it is not necessary to change the layout of the indoor unit 50.
When the flexible duct 61 is removed from the indoor unit 50, the fan guards 17 and 17 similar to the outdoor unit 10 can be attached using the screw holes of the unit case 11 of the indoor unit 50.

  Although the best mode for carrying out the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications and changes can be made based on the technical idea of the present invention. . For example, in this embodiment, the greenhouse 1 is used as a plant cultivation house. However, a glass house other than the greenhouse 1 may be used, and an agricultural air conditioner that air-conditions a known plant cultivation house. The present invention can be widely applied to.

In the present embodiment, the compressor 41 and the accumulator 44 are installed on the outdoor unit 10 side and are not installed in the indoor unit 50. However, the reverse may be possible. In other words, the compressor 41 and the accumulator 44 can be arranged on the indoor unit 50 side, and not installed on the outdoor unit 10 side. Originally, the compressor 41 is installed in an outdoor unit that is disposed outside the living room space because an operation sound is generated. However, in the case of the agricultural air conditioner 6 configured in this way, the quietness of the inner space 3 is not required, and instead it may be desired to reduce the sound of the outer space 2 during driving at night. Excellent effect in some cases.
In this case, when the receiver tank is installed, the space in the indoor unit 50 can be effectively used by arranging the receiver tank on the indoor unit 50 side where the compressor 41 and the accumulator 44 are not installed. .

Further, in the present embodiment, the air in the inner space 3 is taken in by the indoor unit 50, but the air in the outer space 2 is forcibly taken into the inner space 3 by forcing the air in the outer space 2 by the indoor unit. It can also be done.
Moreover, in this embodiment, although the two indoor units 50 are arrange | positioned in the greenhouse 1, it is not restricted to this, When the volume of the greenhouse 1 is small, only one indoor unit 50 is installed. It is good also as a structure, and when the volume of the greenhouse 1 is large, it is good also as a structure which installs many indoor units 50 (in this case, many outdoor units 10).

It is a schematic diagram which shows the state which installed the air conditioner for agriculture in the greenhouse used for cultivation of a plant etc. It is an external appearance perspective view of the outdoor unit used for an agricultural air conditioner. It is a disassembled perspective view which shows the structure of the apparatus accommodated in the unit case of an outdoor unit. It is a perspective view which shows the indoor unit used for the agricultural air conditioner. It is a top view of an indoor unit. It is a figure for demonstrating adjustment of the flexible duct of an indoor unit.

Explanation of symbols

1 greenhouse (house for plant cultivation)
2 outer space 3 inner space 4 outer wall 5 plant 6 agricultural air conditioner (agricultural air conditioner)
7 Refrigerant piping 10 Outdoor unit 11 Unit case 16 Front opening 18 Rear opening 32 Outdoor heat exchanger 34 Blower fan 50 Indoor unit 52 Indoor heat exchanger 61 Flexible duct

Claims (2)

An indoor unit installed in a plant cultivation house;
An outdoor unit connected to the indoor unit by a refrigerant pipe,
The indoor unit includes a case that houses a blower fan and an indoor heat exchanger, and a rear opening that exposes the indoor heat exchanger is formed on a rear surface of the case, and the blower is formed on a front surface of the case. A front opening that blows in conditioned air sucked from the back opening by the fan and passed through the indoor heat exchanger is formed, and a flexible duct through which the conditioned air blown out from the front opening passes is attached to the front opening. Agricultural air conditioner characterized by that.   2. The agricultural air conditioner according to claim 1, wherein a plurality of the front openings are formed at intervals on a front surface of the case, and the flexible ducts are respectively attached to the front openings. apparatus.

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