JP3318829B2 - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce energy loss by providing a fan for passing and circulating the air into and around an object to be heated or cooled, and an air conditioner for blowing heated or cooled air forcibly thereby making uniform the velocity of air flow arriving at the object to be heated or cooled. SOLUTION: A box 4 with a vent is stacked to close a ventilation face 6 and contained in the containing chamber 2 of of the precooling box 1 of an air conditioner. Cooling is then started to supply cold heat from a heat source unit to the cooler 8a of a precooler 8 and a fan 7 is operated along with the fan 8b of the precooler 8 to blow the air in a ventilation chamber 3 to the containing chamber 2 side thus lowering the pressure in the ventilation chamber 3. The air blown into the containing chamber 2 is sucked by the precooler 8 and cooled by the cold heat of the cooler 8a before being blown into the containing chamber 2 by means of the fan 8b. Since the air flow passes substantially uniformly through a wind passage 9 defined by stacking the box 4 with a vent and reaches an object to be cooled at a uniform velocity, energy loss can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly, to circulating air at a differential pressure to uniformly blow an object such as an object to be cooled or an object to be cooled or heated. The present invention relates to an air conditioner capable of performing the following.

[0002]

2. Description of the Related Art In general, air conditioning in a room is performed through a circulation path in which cooled or heated air is blown out from an air outlet of an air conditioner to circulate through the room, and the air is sucked in from an inlet to be cooled or heated again. Is going. At this time, in order to ensure that the object to be cooled or heated in the room is cooled or heated so that air is sucked into the suction port, the pressure in the space near the suction port is positively reduced to circulate air. May be used.

FIG. 12 shows, for example, Japanese Patent Application Laid-Open No. 57-16768.
FIG. 1 is a side view showing an example of a conventional differential pressure type pre-cooling device disclosed in Japanese Unexamined Patent Publication (Kokai) No. H10 (1998). A side wall surface 22 having a suction port 21 is provided below the side wall of the storage 20.
An opening 23 is provided in the upper part of the second unit 2, and a differential pressure ventilation type unit 25 having a precooler 24 is incorporated in the opening 23. The discharge side of the air duct 26 is connected to the upper part of the storage 20, and the differential pressure ventilation type unit 25 is integrated with the storage 20. And the container 27 with a through-hole is stored in the storage 20.
And is stacked on two blocks in front of the suction port 21 so as to surround the suction port 21 so that a space is formed in the middle.

FIG. 13 shows, for example, Japanese Patent Laid-Open No. 59-13777.
It is a side view which shows an example of the conventional differential pressure type pre-cooling apparatus disclosed by Japanese Patent No. 4 (Prior Art 2). Inside the thawing cabinet 30, a thawing truck 31 having an opening at the front and back and having a storage shelf is connected and stored in a duct shape, and is formed by a duct-like passage in the thawing truck 31 and an upper space 32 of the thawing truck 31. A ventilation path for circulating air is formed. An adjustment chamber 33 is provided at one end of the thawing chamber 30, and an upper space 32 and an upper space 32 of the adjustment chamber 33 are provided.
A pre-cooler 34 is provided in the vicinity of the boundary with.

[0005] In any of the differential pressure type pre-cooling apparatuses shown in the prior arts 1 and 2, after the object to be cooled such as vegetables is rapidly cooled, a constant pre-cooling temperature is always maintained to suppress the respiratory action of the vegetables and the like and to store them at low temperature. It is carried out.

[0006]

In the differential pressure type pre-cooling device configured as described above, the air flow changes direction in the room, and when reaching the surface of the object to be cooled, a vortex is generated to generate a low pressure portion. The airflow hardly flows through some harvest boxes because the airflow is drawn, and the cooled object is not cooled, or an extra cooling load is generated because the cooling performance is set according to the part where the airflow is difficult to flow There was a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. When the airflow cools or heats an object to be cooled or an object to be heated, the airflow speed is reduced or the airflow direction is changed. It is an object of the present invention to obtain a differential pressure type air conditioner capable of reducing energy loss caused by generation of a vortex due to air.

[0008]

SUMMARY OF THE INVENTION The present invention relates to an air conditioner which blows heated or cooled air and circulates the air indoors, wherein a differential pressure is provided at both ends of an object to be heated or cooled. A blower that allows air to pass through and circulates inside and around the object to be heated or cooled, and is provided in a portion of the air circulation path where the probability of vortex generation is high , and changes the airflow direction,
An air conditioner for forcibly blowing heated or cooled air was provided.

An air conditioner for blowing heated or cooled air to circulate the air in a room, wherein the heated or cooled air is forcibly blown out of the object to be heated or the object to be cooled and its surroundings. An air conditioner that allows air to pass through and circulates air, and a blower that is provided at a portion of the air circulation path where the probability of occurrence of vortices is high and that changes the airflow direction are provided.

[0010]

[0011]

[First Embodiment] FIG. 1 is a configuration diagram of a first embodiment of the present invention. Reference numeral 1 denotes a pre-cooling compartment of a differential pressure pre-cooling type air conditioner, reference numerals 2 and 3 denote a housing room and a ventilation room of the pre-cooling cabinet 1, and 4 denotes a box with a ventilation hole housed in the housing room 2 and housing foods and the like. is there. Reference numerals 5 and 6 denote a ventilation blocking plate and a ventilation surface provided on the same surface, respectively. The pre-cooling cabinet 1 is divided into a housing room 2 and a ventilation room 3, and the amount of the box 4 with a ventilation hole housed in the housing room 2. Can change the area ratio. 7
Is a blower such as an axial fan provided above the ventilation blocking plate 5. Differential pressure is provided at both ends of the box 4 with air holes, and air is circulated inside and around the box 4 with air holes.

Reference numeral 8 denotes a precooler, which is an air conditioner provided in an upper portion near the side wall of the storage chamber 2 facing the ventilation blocking plate 5, that is, a portion having a high vortex generation probability in the air circulation path. The blower 8b forcibly blows out cooled air. That is, when cooling is started, cold heat is supplied to the cooler 8a from the heat source device (not shown) by the heat transfer medium. The forced air is blown out by the blower 8b. 9 is an air path formed by the ventilation surface 6 and the box 4 with ventilation holes.

The operation of the first embodiment configured as described above will be described. First, the boxes 4 with the ventilation holes are stacked so as to completely cover the ventilation surface 6 provided on the same surface as the ventilation blocking plate 5 and accommodated in the accommodation room 2 of the pre-cooling cabinet 1. In this way, when the box 4 with the ventilation hole is accommodated in the accommodation room 2, cooling is started,
Cold heat is supplied to the cooler 8a of the precooler 8 from the heat source device by the heat transfer medium. In addition, the blower 7 and the blower 8b in the precooler 8 move to force the air in the ventilation chamber 3 to blow out to the accommodation room 2 side, so that the pressure of the ventilation room 3 becomes lower than that of the accommodation room 2. The air blown into the storage chamber 2 is supplied to the pre-cooler 8
And is cooled by the cool heat of the cooler 8a, and is blown out from the precooler 8 toward the floor of the storage room 2 by the blower 8b in the precooler 8.

Thus, the cool air blown out toward the floor surface is
Since the ventilation chamber 3 has a lower pressure than the accommodation chamber 2, the ventilation chamber 3 passes through the ventilation surface 6 through the air passage 9 formed by stacking the boxes 4 with ventilation holes, and reaches the ventilation chamber 3. The air is blown out again to the storage chamber 2 side by the blower 7.

In contrast to the present embodiment configured as described above, in the prior art, there is a pre-cooler 8 near the blower 7, and there is no device near the pre-cooler 8 to change the airflow direction. Therefore, once the blown air flow reaches the end as it is, the width of the flow path increases, and separation occurs on both sides of the flow path, thereby generating a vortex. In this case, the downstream of the flow path is a flow path to the ventilation chamber 3 having a lower pressure than the storage chamber 2 formed of the group of boxes with ventilation holes.
The airflow is rapidly changed in the direction of the flow path to the ventilation chamber 3 composed of a group of boxes with ventilation holes.

Since the box 4 with the ventilation holes serves as a barrier not only for the ventilation path but also for the airflow, the collision generates an airflow which changes its direction, and the airflow is further entrained in the vortex and the vortex develops. For this reason, the air flow not only flows into the ventilation chamber 3 through the flow path of the box 4 with vents, but also increases the rate of being drawn by the vortex, and the flow near the generated vortex is substantially parallel to the flow path. The air flow drops from the flow path that has reached the, and the wind speed also decreases. Moreover, since the airflow is drawn by both the ventilation chamber 3 and the vortex as a whole,
The airflow on the side of the accommodation room 2 is entirely drawn upward, and the airflow may not reach the lower part of the ventilation path.

On the other hand, according to the first embodiment,
The pre-cooler 8, which is a forced air blower, is also present at a position where the air flow path expands and the direction changes most rapidly other than the position where a pressure difference is generated between the storage chamber 2 and the ventilation chamber 3. Therefore, since the vortex generated due to the separation of the air flow due to the expansion of the flow path can be eliminated, the inside of the air passage 9 formed by stacking the boxes 4 with the air holes is almost uniformly drawn by the low pressure of the ventilation chamber 3 without distinction between the upper and lower sides. Will pass.

[Embodiment] An embodiment of the first embodiment will be described with reference to the air flow distribution diagram and the pressure distribution diagram in the center cross section of the room during the differential pressure pre-cooling shown in FIGS. Pre-cooler 1 is length 1
0 m, height 4 m, blower 8 b of blower 7 and precooler 8
The wind blown out from the outlet is blown out uniformly in the length direction in the width of the pre-cooling box. The calculation of the airflow in the width direction is omitted, and only the length and height are described with respect to dimensions. The length of the ventilation room 3 is 1 m, the length of the accommodation room 2 is 9 m, and the accommodation room 2
Each of the boxes 4 with vents stacked therein has a height of 0.2 m, and a stack of five pallets stacked in two tiers has a length of 6.5 m from the boundary between the ventilation chamber 3 and the accommodation chamber 2. The height was 2.7 m. There are ventilation paths for each box and pallet, and there are a total of 12 ventilation paths.

The blower 7 is mounted near the ceiling at the boundary between the ventilation room 3 and the accommodation room 2 and sucks air in the ventilation room 3.
It blows out to the accommodation room 2 side. It is assumed that the ventilation blocking plate 5 located at the boundary between the ventilation chamber 3 and the accommodation chamber 2 between the blower 7 and the box group model with ventilation holes has no ventilation. The pre-cooler 8 is installed near the side wall of the accommodation room 2, has an installation height of 3.2 m, and is at the same height as the lowermost part of the blower 7. The air sent from the blower 7 is sucked into the suction port at the upper part of the precooler 8, the air is cooled by the cooler 8 a in the precooler 8, and the floor of the accommodation room 2 is blown from the outlet at the lower part of the precooler 7. Blows air toward the surface. The blowing air speed of the precooler 8 and the blower 7 was 3 m / s, and the pressure of each suction port was determined. Since the calculation assumes a steady state in the pre-cooling box 1, the temperature inside the pre-cooling box 1 is assumed to be substantially uniform, and the density calculation based on the air temperature is omitted.

At this time, the wind velocity in the ventilation path at the top of the box group with vent holes is 1.8 m / s at the air inlet on the accommodation room 2 side, and 1 m at the air exit at the interface between the accommodation room 2 and the ventilation room 3. 0.6 m / s, the wind velocity of the cardboard ventilation passage at the bottom of the box group with vent holes is 1.4 m / s at the air inlet on the accommodation room 2 side, and at the air outlet at the boundary between the accommodation room 2 and the ventilation room 3. 1.4 m / s, the uppermost box with ventilation holes at the bottom of the box group with ventilation holes, in which the air flow is most horizontal to the flow path.
Wind velocity at the air inlet on the accommodation room 2 side is 1.6 m /
s, even at the air outlet at the interface between the accommodation room 2 and the ventilation room 3.
5 m / s.

The pressure at this time is 99993.4 P at the air inlet on the accommodation room 2 side in the ventilation path at the top of the box group with ventilation holes.
a, 999 at the air outlet at the interface between the accommodation room 2 and the ventilation room 3
At 87.4 Pa, the pressure difference is 6.0 Pa, and the pressure of the ventilation path of the cardboard at the bottom of the box group with ventilation holes is 99998.3 Pa at the air inlet on the accommodation room 2 side, and the boundary surface between the accommodation room 2 and the ventilation room 3 is At the air outlet, the pressure was 99993.4 m / s, the pressure difference was 4.9 Pa, and the pressure in the ventilation path of the uppermost ventilation box 4 in the lowermost ventilation box group, in which the air flow was most horizontal to the flow path, was stored. The pressure difference is 5999 Pa at 99997.9 Pa at the air inlet on the chamber side and 99992.4 Pa at the air outlet at the boundary between the storage chamber 2 and the ventilation chamber 3.

As shown in FIGS. 2 and 3, the vortex disappears, that is, a negative pressure that unnecessarily involves the air flow in the ventilation chamber 3 is not generated. The airflow vertically and uniformly flows through the ventilation path from the storage chamber 2 to the ventilation chamber 3 formed by the stacked boxes. In addition, the energy loss of the airflow that has been conventionally involved due to the generation of the vortex can be reduced. Therefore, the food and the like stored in the box with vents 4 in the storage chamber 2 can be cooled more uniformly and quickly than before.

In the above description, the size, number, and performance of the pre-cooler 8 and the blower 7, which are air conditioners, are not limited, and the air conditioning is not limited to only cooling or heating. (The same applies hereinafter).

[Second Embodiment] FIG. 4 is a configuration diagram of a second embodiment of the present invention. The same parts as those of the first embodiment are denoted by the same reference numerals, and the description is omitted. In the second embodiment, the positions of the blower 7 and the precooler 8 shown in the first embodiment are interchanged. Reference numeral 7 denotes a blower provided in an upper portion near the side wall of the storage chamber 2 facing the ventilation blocking plate 5, that is, in a portion of the air circulation path where vortex generation is highly established. Reference numeral 8 denotes a pre-cooler, which is an air conditioner provided above the ventilation blocking surface 5 and comprises a cooler 8a and a blower 8b. The cooled air is forcibly blown out, and a differential pressure is applied to both ends of the box 4 with the ventilation hole. Is provided to allow the cooled air to pass through and circulate inside and around the box 4 with vents.

The operation of the second embodiment configured as described above will be described. First, the boxes 4 with the ventilation holes are stacked so as to completely cover the ventilation surface 6 provided on the same surface as the ventilation blocking plate 5 and accommodated in the accommodation room 2 of the pre-cooling cabinet 1. In this way, when the box 4 with the ventilation hole is accommodated in the accommodation room 2, cooling is started,
Cold heat is supplied from the heat source device to the cooler 8a of the pre-cooler 8 by the heat transfer medium. In addition, the blower 8 and the blower 7 in the precooler 8 are operated, and the blower 8b in the precooler 8 forcibly blows out the air in the ventilation chamber 3 to the accommodation room 2 side. The pressure drops. At this time, the temperature of the blown air decreases due to the cool heat supplied to the cooler 8a of the precooler 8. The air thus cooled and blown out to the storage room 2 is blown out by the blower 7 toward the floor of the storage room 2.

The cold air blown out toward the floor surface passes through the ventilation surface 6 through the air passage 9 formed by stacking the boxes 4 with the ventilation holes, since the ventilation room 3 has a lower pressure than the accommodation room 2. It reaches the ventilation chamber 3. The air is blown out toward the storage chamber 2 again by the blower 8 b of the precooler 8.

In contrast to the present embodiment configured as described above, in the prior art, there is no device that changes the airflow at the location where the blower 7 is located. Therefore, the second embodiment has effects that are not found in the related art. However, since these effects are substantially the same as the effects shown in the first embodiment, description thereof will be omitted.

EXAMPLE An example of the second embodiment will be described with reference to FIGS. 5 and 6 showing an airflow distribution diagram and a pressure distribution diagram in a center cross section of a room at the time of differential pressure precooling. The pre-cooler 8 is attached near the ceiling surface at the boundary between the ventilation room 3 and the accommodation room 2, sucks air in the ventilation room 3, cools the air with the cooler 8 a, and blows out the air to the accommodation room 2 side. It is assumed that the ventilation blocking plate 5 located at the boundary between the ventilation chamber 3 and the accommodation chamber 2 between the precooler 8 and the box group model with ventilation holes has no ventilation. The blower 7 is installed near the side wall of the accommodation room 2, has a height of 3.2 m, and is at the same height as the lowermost part of the precooler 8. The blower 7 includes a pre-cooler 8
The air sent from the blower 8b is blown out toward the floor of the storage room 2.

At this time, the pressure of the ventilation path of the lowermost cardboard box group at the bottom of the box group with vent holes is 99993.5 Pa at the air outlet at the interface between the accommodation room 2 and the ventilation room 3, and the pressure difference is 4.8.
Pa. The configuration and operation of the other examples are the same as the configuration and operation of the example of the first embodiment, and a description thereof will not be repeated. Further, the effects are substantially the same as the effects shown in the example of the first embodiment, and the description will be omitted.

[Third Embodiment] FIG. 7 is a configuration diagram of a third embodiment of the present invention. The same parts as those of the first embodiment are denoted by the same reference numerals, and the description is omitted. In the third embodiment, the precooler 8 is located at the position of the blower 7 shown in the first embodiment, and the air guide plate is provided without the blower 7.

Numeral 8 denotes a pre-cooler, which is an air conditioner provided above the ventilation blocking surface 5 and comprises a cooler 8a and a blower 8b. , And the cooled air is passed through and circulated through the box 4 with vent holes. Reference numeral 10 denotes a baffle plate attached so as to extend from directly below the pre-cooler 8 toward the accommodation room 2 so as to be parallel to and longer than the group of boxes with vents.
The cooling air blown out of the pre-cooler 8 is provided with directivity, and the cooling air is guided from the outlet of the precooler 8 to the vicinity of the interior wall facing the outlet.

The operation of the third embodiment configured as described above will be described. First, the boxes with vents 4 are stacked so as to completely cover the ventilation surface 6 provided on the same surface as the ventilation blocking plate 5,
It is stored in the storage room 2 of the pre-cooling cabinet 1. In this way, when the box 4 with the vent hole is accommodated in the accommodation room 2, the cooling is started, and the cold heat is transferred from the heat source device side to the cooling room 8 of the precooler 8 by the heat transfer medium.
a. Further, the blower 8b in the precooler 8 is operated, and the air in the ventilation chamber 3 is forcibly blown out to the accommodation room 2 side, so that the pressure of the ventilation room 3 becomes lower than that of the accommodation room 2. At this time, the temperature of the blown air decreases due to the cool heat supplied to the cooler 8a of the precooler 8.

The cooling air thus cooled and blown out to the storage chamber 2 proceeds along the air guide plate 10. Since the cooling air that has reached the end of the air guide plate 10 has a lower pressure on the ventilation chamber 3 side than on the accommodation chamber 2 side, the cooling air passes through the ventilation path 6 through the air passage 9 formed by stacking the boxes 4 with ventilation holes, It reaches the ventilation chamber 3. The air is blown out again by the pre-cooler 8 to the accommodation room 2 side.

In contrast to the present embodiment configured as described above, in the prior art, since the air guide plate has the same length as the box group with the ventilation holes, it is blown out from the precooler 8 and guided by the air guide plate. When the flow reaches the end of the flow, the width of the flow path increases, and separation occurs on both sides of the flow path, thereby generating a vortex. In this case, since the lower side of the flow path is a flow path to the ventilation chamber 3 having a lower pressure than the storage chamber 2 formed of the group of boxes with ventilation holes, the airflow flows in the direction of the flow path to the ventilation chamber 3 formed of the group of boxes with ventilation holes. Change direction rapidly.

Since the box 4 with the vent hole serves as a barrier not only for the ventilation path but also for the airflow, the collision generates an airflow that changes direction, and the airflow is further entrained in the vortex, and the vortex develops. For this reason, the air flow not only flows into the ventilation chamber 3 through the flow path of the box 4 with vents, but also increases the rate of being drawn by the vortex, and the flow near the generated vortex is substantially parallel to the flow path. The air flow drops from the flow path that has reached the, and the wind speed also decreases. Moreover, since the airflow is drawn by both the ventilation chamber 3 and the vortex as a whole,
The airflow on the side of the accommodation room 2 is entirely drawn upward, and the airflow may not reach the lower part of the ventilation path.

On the other hand, according to the third embodiment, even if the air flow guided by the baffle plate 10 reaches its end, the flow path width is expanded and vortices are generated on both sides of the flow path, Since it is installed so as to be longer than the group of attached boxes, the increase of the vortex due to the collision of the airflow on the front of the group of boxes with ventilation holes can be reduced. Therefore, the inside of the air passage 9 formed by stacking the boxes 4 with the ventilation holes is almost uniformly drawn by the low pressure of the ventilation chamber 3 without discrimination between the upper and lower sides, so that the air flow passes.

[Embodiment] An embodiment of the third embodiment will be described with reference to the air flow distribution diagram and the pressure distribution diagram in the center cross section of the room during the differential pressure pre-cooling shown in FIGS. 8 and 9
In both cases, the length of the air guide plate 10 is set to be 1.25 times as long as the box group in which the boxes 4 with the ventilation holes accommodated in the accommodation room 2 are stacked. The precooler 1 has a length of 10 m and a height of 4 m, and the wind blown out of the precooler 8 blows out uniformly in the length direction in the width of the precooler. The calculation of the airflow in the width direction is omitted, and only the length and height are described with respect to dimensions.

The length of the ventilation room 3 is 1 m, the length of the accommodation room 2 is 9 m, the boxes 4 with the ventilation holes stacked in the accommodation room 2 are each 0.2 m in height, and five boxes are stacked on a pallet. As a case of stacking in two stages, the length was 6.5 m and the height was 2.7 m from the boundary between the ventilation chamber 3 and the storage chamber 2. There are ventilation paths for each box and pallet, and there are a total of 12 ventilation paths.

The pre-cooler 8 is attached near the ceiling surface at the boundary between the ventilation room 3 and the accommodation room 2 and sucks air in the ventilation room 3.
The air is cooled by the cooler 8a in the pre-cooler 8, and
Blow out to Immediately below the precooler 8, a height of 3.2 m above the floor was introduced from the boundary between the accommodation room 2 and the ventilation room 3 to the accommodation room 2 side with a length of 8.125 m, which is 1.25 times the size of the box group with ventilation holes. A wind plate 10 is attached. It is assumed that there is no ventilation at all in the ventilation blocking plate 5 located at the boundary between the ventilation chamber 3 and the accommodation chamber 2 between the precooler 8 and the box group model with ventilation holes. The blowing wind speed of the precooler 8 was 3 m / s, and the pressure at the suction port was determined. Since the calculation assumes a steady state in the pre-cooling box 1, the temperature inside the pre-cooling box 1 is assumed to be substantially uniform, and the density calculation based on the air temperature is omitted.

At this time, the wind velocity in the ventilation path at the top of the box group with vent holes is 1.9 m / s at the air inlet on the accommodation room 2 side, and 1 at the air exit at the interface between the accommodation room 2 and the ventilation room 3. 0.7 m / s, the wind velocity of the lower corrugated cardboard ventilation passage at the bottom of the group of vented boxes is 1.0 m / s at the air inlet on the accommodation room 2 side, and at the air outlet at the interface between the accommodation room 2 and the ventilation room 3. 1.0 m / s, uppermost vented box 4 at the bottom of the vented box group where the air flow is most horizontal to the flow path
The wind speed of the air passage of 2.5 m /
s, even at the air outlet at the interface between the accommodation room 2 and the ventilation room 3.
2 m / s.

The pressure at this time is 99994.3 P at the air inlet on the side of the accommodation room 2 in the ventilation path at the top of the box group with ventilation holes.
a, 999 at the air outlet at the interface between the accommodation room 2 and the ventilation room 3
91.8 Pa, a pressure difference of 2.5 Pa, the pressure of the ventilation path of the cardboard at the bottom of the box group with ventilation holes is 100000.1 Pa at the air inlet on the accommodation room 2 side, and the pressure of the boundary between the accommodation room 2 and the ventilation room 3 At the air outlet, the pressure difference is 99998.7m / s and the pressure difference is 1.4P
a, The pressure of the ventilation path of the uppermost box 4 with ventilation holes, which is the lowermost box group with ventilation holes in which the air flow is most horizontal to the flow path, is 99994.7 Pa at the air inlet on the accommodation room 2 side. The pressure difference at the air outlet 99992.1 Pa at the interface with 3.
6 Pa.

As shown in FIGS. 8 and 9, since the entrainment of the airflow has been eliminated, no negative pressure for unnecessarily entraining the airflow has been generated in the ventilation chamber 3, and the ventilated box accommodated in the accommodation chamber 2 has been removed. It can be confirmed that the airflow vertically and uniformly flows through the ventilation path from the accommodation room 2 to the ventilation room 3 formed by the group of boxes in which the 4 is stacked.

In the above description, a plate-shaped device has been described as the air guiding means of the air conditioner. However, the size, number and performance of the conducting means are not limited to those described above (the same applies hereinafter).

[Fourth Embodiment] In the third embodiment, a flat plate is used as the air guiding means. However, in the fourth embodiment, a duct is used instead of a flat plate (not shown). The air guide duct is installed so as to be parallel to and longer than the box group with vents from directly below the precooler 8 toward the accommodation room 2 and blows out from the precooler 8. Directivity is given to the cooling air, and the cooling air is guided from the outlet of the precooler 8 to the vicinity of the indoor wall facing the outlet. The shape and material of the air guide duct are not limited. However, it is preferable that the air guide duct is made of a material as light as possible and can be easily installed with a metal wire or the like. Other configurations and operations are the same as those described in the third embodiment, and a description thereof will not be repeated.

According to the fourth embodiment, even if the airflow guided by the air guide duct is formed at the end of the airflow duct and the width of the flow path is increased and vortices are generated on both sides of the flow path, the distance to the group of boxes with ventilation holes is increased. Since it is provided, it is possible to reduce the increase in vortices due to the collision of the airflow on the front of the box group with ventilation holes. Therefore, the inside of the air passage 9 formed by stacking the boxes 4 with the ventilation holes is almost uniformly without distinction between the upper and lower sides.
The air flow is drawn by the low pressure.

Comparative Example 1 Examples have been shown in each of the first, second, and third embodiments. A comparative example will be described for comparison with these examples. The following comparative example has a configuration corresponding to the prior art 2 shown in FIG. FIG.
0 and FIG. 11 are an airflow distribution diagram and a pressure distribution diagram, respectively, at the center cross section of the room during the differential pressure precooling according to Conventional Technique 2.

The precooler 1 has a length of 10 m and a height of 4 m, and the wind blown out of the precooler 8 blows out uniformly in the length direction in the width of the precooler. The calculation of the airflow in the width direction is omitted, and only the length and height are described with respect to dimensions.
The length of the ventilation room 3 is 1 m, the length of the accommodation room 2 is 9 m, and the boxes 4 with the ventilation holes stacked in the accommodation room 2 are each 0.2 m high,
Assuming that the five pallets were stacked in two stages, the length was 6.5 m and the height was 2.7 m from the boundary between the ventilation chamber 3 and the storage chamber 2. There are ventilation paths for each box and pallet, and there are a total of 12 ventilation paths.

The pre-cooler 8 is mounted near the ceiling at the boundary between the ventilation room 3 and the accommodation room 2 and sucks air in the ventilation room 3.
The air is cooled by the cooler 8a in the pre-cooler 8, and
Blow out to the side. Immediately below the pre-cooler 8, a 6.5 m-long wind guide plate is installed at a height of 3.2 m above the floor from the boundary between the accommodation room 2 and the ventilation room 3 on the accommodation room 2 side, which is the same as the box group with ventilation holes. ing. It is assumed that there is no ventilation at all in the ventilation blocking plate 5 located at the boundary between the ventilation chamber 3 and the accommodation chamber 2 between the precooler 8 and the box group model with ventilation holes. The blowing air speed of the precooler 8 was 3 m / s, and the pressure at the suction port was determined. The airflow is treated as a laminar flow, and the calculation assumes a steady state in the pre-cooling box 1. Therefore, it is assumed that the temperature in the pre-cooling box 1 is substantially uniform, and the density calculation based on the air temperature is omitted.

According to this analysis, when the airflow guided by the baffle plate reaches its end, the airflow flows toward the accommodation chamber 2. That is, the flow path width is increased. For this reason, separation occurs on both sides of the flow path immediately after the flow path width is increased, and a vortex is generated. In this case, since the downstream of the flow path is the flow path to the ventilation chamber 3 at a lower pressure than the storage chamber 2 formed of the group of boxes with ventilation holes, the air flow is easily drawn there. Therefore, the airflow is more rapidly changed to the lower pressure side, that is, the direction of the flow path to the ventilation chamber 3 composed of the box group with the ventilation holes.

By the way, since the box 4 with the ventilation hole becomes not only a ventilation path but also an airflow barrier, the collision generates an airflow which changes its direction, and the airflow is further entrained in the vortex and the vortex develops. For this reason, the air flow not only flows into the ventilation chamber 3 through the flow path of the box 4 with a vent but also increases the rate of being drawn by the vortex, and the flow near the generated vortex is substantially parallel to the flow path. The air flow drops from the flow path that has reached the, and the wind speed also decreases. In addition, since the airflow is drawn to both the ventilation chamber 3 and the vortex as a whole, the airflow on the accommodation chamber 2 side is drawn upward as a whole, and the airflow does not reach the lower part of the ventilation path.

At this time, the wind velocity of the air passage at the uppermost part of the box group with the vent hole is 1.1 m / s at the air inlet on the side of the accommodation room 2 and 0 at the air outlet at the boundary surface between the accommodation room 2 and the ventilation room 3. .93m / s,
The wind speed of the lower corrugated cardboard ventilation passage at the bottom of the group of vented boxes is 1.4 m / s at the air inlet on the side of the accommodation room 2, and the accommodation room 2 and the ventilation room 3
The air velocity at the air outlet of the uppermost box 4 at the bottom of the box group with vents, which is 1.4 m / s at the air outlet at the boundary surface with the airflow and which is the horizontal to the flow path, is the air at the accommodation chamber 2 side. 2.5m at the entrance
/ S, and 2.5 m / s even at the air outlet at the interface between the accommodation room 2 and the ventilation room 3.

The pressure at this time is 99996.8 P at the air inlet on the side of the accommodation room 2 in the ventilation path at the top of the box group with ventilation holes.
a, 999 at the air outlet at the interface between the accommodation room 2 and the ventilation room 3
At 96.0 Pa, the pressure difference is 0.8 Pa, and the pressure of the ventilation path of the corrugated cardboard at the bottom of the box group with ventilation holes is 999999.8 Pa at the air inlet on the accommodation room 2 side. At the air outlet, 99997.4 Pa, the pressure difference is 2.4 Pa,
The pressure of the ventilation path of the uppermost box with vents 4 at the bottom of the group of boxes with vents in which the air flow is most horizontal to the flow path is 99995.4 Pa at the air inlet on the accommodation room 2 side. The pressure difference is 4.7P at the air outlet 99990.7Pa at the boundary surface of
a.

As described above, in the conventional differential pressure type air conditioner, the air flow changes direction in the room, and when it reaches the surface of the object to be cooled, a vortex is generated to generate a low pressure portion. However, there is a problem that the air flow hardly circulates in some harvest boxes and the object to be cooled is not cooled, or an extra cooling load is generated because the cooling performance is set according to the part where the air flow is difficult to flow. is there.

[0054]

As is apparent from the above description, the present invention relates to an air conditioner which blows heated or cooled air and circulates the air indoors. A blower that allows air to pass through and circulates inside and around the object to be heated or cooled, and a blower that provides high vortex generation in the air circulation path to change the airflow direction
And an air conditioner for forcibly blowing heated or cooled air. Therefore, when the airflow blown in a certain direction to the object to be heated or the object to be cooled changes its direction and reaches the object to be heated or the object to be cooled , the air conditioner
The direction of the airflow is changed, so that vortex generation can be eliminated, the entrainment of the generated airflow can be eliminated, and the velocity of the airflow reaching the object to be heated or the object to be cooled can be made uniform. Further, even when the air conditioner is present only in one space to be air-conditioned in a plurality of spaces partitioned by the partition plate, heated or cooled air can be supplied to another space to be air-conditioned.

An air conditioner for blowing heated or cooled air to circulate the air inside the room, wherein the heated or cooled air is forcibly blown out of the object to be heated or the object to be cooled and its surroundings. And an air conditioner that circulates the air by passing the air through the air conditioner, and a blower that is provided at a portion of the air circulation path where the probability of vortex generation is high and changes the airflow . For this reason,
When the air flow blown in the direction in which the object to be heated or the object to be cooled changes direction and reaches the object to be heated or the object to be cooled ,
The direction of the air flow is changed by the blower, and vortex generation can be eliminated,
The entrainment of the generated airflow can be eliminated, and the airflow velocity reaching the object to be heated or the object to be cooled can be made uniform.

[0056]

[0057]

[0058]

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a first embodiment of the present invention.

FIG. 2 is an airflow distribution diagram of an example of the first embodiment.

FIG. 3 is a pressure distribution diagram of an example of the first embodiment.

FIG. 4 is a configuration diagram of a second embodiment of the present invention.

FIG. 5 is an airflow distribution diagram of an example of the second embodiment.

FIG. 6 is a pressure distribution diagram of an example of the second embodiment.

FIG. 7 is a configuration diagram of a third embodiment of the present invention.

FIG. 8 is an airflow distribution diagram of an example of the third embodiment.

FIG. 9 is a pressure distribution diagram of an example of the third embodiment.

FIG. 10 is an airflow distribution diagram showing a comparative example of the air conditioner.

FIG. 11 is a pressure distribution diagram showing a comparative example of the air conditioner.

FIG. 12 is a side view showing an example of a conventional differential pressure pre-cooling device.

FIG. 13 is a side view showing another example of the conventional differential pressure pre-cooling device.

[Explanation of symbols]

1 Pre-cooler, 2 storage room, 3 vent room, 4 box with vent hole, 5 ventilation blocker, 7 blower, 8 pre-cooler, 9 air passage, 10 air guide plate.

Claims (2)

(57) [Claims] 1. An air conditioner for blowing heated or cooled air and circulating the air indoors, wherein a differential pressure is provided at both ends of the object to be heated or the object to be cooled, and the inside of the object to be heated or the object to be cooled. And an air conditioner that is provided in a portion of the air circulation path where the probability of vortex generation is high, changes the airflow direction, and forcibly blows heated or cooled air. An air conditioner comprising: 2. An air conditioner in which heated or cooled air is blown to circulate the air in a room, wherein the heated or cooled air is forcibly blown out inside and around the object to be heated or the object to be cooled. An air conditioner, comprising: an air conditioner that circulates air by passing the air; and a blower that is provided in a portion of the air circulation path having a high vortex generation probability and changes an air flow direction.