JPH09226357A - Heat accumulation type cooler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce manufacturing cost of a resin made case in a heat accumulation type cooler to cool a nap room, or the like of a truck by a heat accumulating material. SOLUTION: A heat accumulation type cooler is furnished with a heat accumulating pack 23 storing a heat accumulating material, an evaporator 10 for heat accumulation to cool this heat accumulating pack 23 and an air blower in a resin made case, and it is constituted to blow out cold air cooled by the heat accumulating pack 23 to a cooling objective portion of a nap room, or the like of a truck by the air blower. In this case, this case is constituted of a frame shape main body case 162 storing and supporting the heat accumulating pack 23, the evaporator 10 for heat accumulation and the air blower, a front surface case 160 to block a front surface opening side of this main body case 162 and a rear surface case 161 to block a rear surface opening side of the main body case 162.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold storage type cooling device for cooling a room by utilizing latent heat of fusion of a cold storage material, and is suitable as a cooling device for cooling a nap room of a vehicle (for example, a truck).

[0002]

2. Description of the Related Art Conventionally, as a cool storage type cooling device for cooling a nap room of a vehicle, a device disclosed in Japanese Patent Laid-Open No. 62-149509 has been known. , A nap room is formed, and a cooling unit is provided on the rear wall surface of the nap room. An inlet is provided in the lower part of the case of the cooling unit, and an outlet is provided in the upper part of the case. Is equipped with a cold storage type cooling unit and a blower.

The cold storage type cooling unit comprises a refrigerant evaporator provided in an air conditioning refrigeration cycle of a vehicle and a cold storage material which is cold stored in the evaporator. And cool the regenerator material,
Then, when the driver takes a nap in the nap room when the truck is stopped, the blower is operated to blow air to the air flow path of the regenerator material, and heat is exchanged between the regenerator material and the blast air to blow air. The air is cooled and the cooled air is blown out from the air outlet into the nap room.

[0004]

In the above cold storage type cooling device, in order to lengthen the cooling time (cooling time during parking) due to latent heat of melting of the frozen cold storage material, the amount of the built-in cold storage material becomes considerably large. . For example, when parking
According to the trial production and examination by the present inventors, it has been found that about 8 kg of the cold storage material is required to establish the specification of blowing out the cold air of ° C for 4 hours.

When the case of the cooling unit is made of resin, it is necessary to support the weight of the evaporator and the like in addition to the weight of the regenerator material, and therefore the strength of the outer case alone becomes insufficient. However, the conventional device described in the above publication does not specifically disclose the case structure of the cooling unit. Therefore, the present inventors have taken measures to add a skeletal member inside the outer case (see the reference example of FIG. 6 described later) to cope with the above lack of strength. However, there is a problem in that the outer case has a large size and the manufacturing cost of the cooling unit case is high.

In view of the above points, an object of the present invention is to provide a regenerator type cooling device capable of manufacturing a case of a cooling unit at low cost.

[0007]

The present invention employs the following technical means to achieve the above object. Claim 1
In the invention described in 4, the pack-shaped member (23) containing the regenerator material in the resin case (16), the heat storage heat exchanger (10) for cooling the pack-shaped member (23), and the blower. And a means (21) for discharging the cool air cooled by the pack-like member (23) to the target area for cooling by the air blowing means (21), wherein the case (16) is packed. A frame-shaped main body case (162) that incorporates the member (23), the heat exchanger (10) for cold storage, and the blower means (21) and supports them, and the front opening side of the main body case (162). A front case (160) coupled to the front opening side of the main body case (162) so as to be closed, and a rear surface of the main body case (162) so as to close the rear opening side of the main body case (162). Coupled to the opening side It is characterized in that it constitutes from a surface casing (161) after that.

As a result, the resin case (16) is
Cases (160, 161,
162), the size of the front case (160) and the rear case (161) in the depth direction can be significantly reduced, and the manufacturing costs of the molding die and the molding machine can be reduced. Further, the main body case (162) is provided with a reinforcing rib on the inner side surface that is not the design surface or has a thicker wall, so that the pack-shaped member (23) which is a heavy object and the heat exchanger for cold storage (1).
The strength for supporting 0) can be easily ensured.

In particular, according to the third aspect of the invention, the front case (160) and the rear case (161) have the same outer shape, and the air suction port (18) is provided near the lower end of the front case (160). An outlet of the cooling medium circulation pipe (30, 31) of the heat exchanger for cold storage (10) which is open and near the lower end of the rear case (161) at a portion corresponding to the air inlet (18). It is characterized in that (161b) is opened.

This makes it possible to mold the front case (160) and the rear case (161) with a common molding die, and since the openings (18, 161b) are set in the same part, they are the same. The opening (18, 161b) can be formed by the nesting having the nesting line, the manufacturing cost of the nesting part can be reduced, and the die cost can be further reduced.

The reference numerals in parentheses of the above-mentioned means indicate the correspondence with the concrete means described in the embodiments to be described later.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention shown in the drawings will be described. (First Embodiment) FIG. 1 shows a refrigerating cycle in the case where the present invention is applied to a cold storage type cooling device for a nap room for a truck. Reference numeral 1 denotes a compressor, which is a running engine (not shown) of the truck. It is adapted to be driven via the electromagnetic clutch 1a. Reference numeral 2 is a condenser for cooling and condensing the high-temperature, high-pressure gas refrigerant discharged from the compressor 1, and 3 is a liquid receiver for accumulating the liquid refrigerant condensed in the condenser 2 and for discharging only the liquid refrigerant.

Reference numeral 4 denotes a normally open solenoid valve for intermittently flowing the refrigerant flow,
Reference numeral 5 is a temperature-operated expansion valve as a pressure reducing means for decompressing and expanding the liquid refrigerant, and 5a is a temperature-sensitive cylinder thereof. Reference numeral 6 is a refrigerant evaporator for air conditioning of a truck driver's cab, and a truck driver's cab 12
(Refer to FIG. 2) It is installed in an air conditioning unit 13 arranged below the instrument panel 12a in front. Air is blown into the air conditioning unit 13 by a blower (not shown), and the blown air is cooled by the evaporator 6, and then passes through a heater unit (not shown) and an outlet mechanism, and a driver's cab (vehicle interior) 12
It is designed to blow out inside.

Reference numeral 7 is an air-conditioning refrigerant circuit having the above-mentioned cab air-conditioning equipment (5, 6), and the solenoid valve 4 connects and disconnects the refrigerant flow to the air-conditioning refrigerant circuit 7. Reference numeral 8 is a cold storage refrigerant circuit provided in parallel with the air conditioning refrigerant circuit 7, and 9 is a constant pressure expansion valve as a pressure reducing means for decompressing and expanding the liquid refrigerant flowing into the cold storage refrigerant circuit 8, the downstream side of which is predetermined. When the pressure drops below the pressure, the valve opens.

Reference numeral 10 is a cold storage refrigerant evaporator (cooling means, cooling heat exchanger) for storing cold in a nap room 14 installed behind the cab 12 of the truck. The evaporator 10 is installed in the case 16 of the cooling unit 15 installed in the nap room 14. A check valve 11 prevents the high-temperature refrigerant from flowing back from the air conditioning evaporator 6 side to the cold storage evaporator 10 and allows the refrigerant to flow in only one direction from the upstream side to the downstream side of the cold storage evaporator 10. It is something to flush.

FIG. 2 shows a concrete form in which the device of the present invention is installed in a nap room for a truck.
A nap room 14 in which a bed 14a is arranged is formed in the rear of the. The nap 14 and the driver's cab 12 can be partitioned by a curtain 17 or the like. In the nap room 14, the cooling unit 15 is arranged on the side wall 18 at one end side in the vehicle width direction. As shown in FIG. 2, the cooling unit 15 has a resin case 16 formed in a vertically long and thin rectangular parallelepiped shape, and the air in the nap chamber 14 is sucked into the lower front portion of the case 16. A suction port 18 is provided. This suction port 1
8 is formed over substantially the entire area of the front surface width direction of the cooling unit case 16.

Further, a lattice-shaped blow-out port 19 is provided in the upper front portion of the case 16 to blow cold air toward the side wall (not shown) on the other end side in the vehicle width direction. The cooling unit 15 is placed and fixed on a mounting stay 150 formed in a gate shape so as to straddle the end of the bed 14a.
1 and 2, reference numeral 30 is a cold storage high-pressure side refrigerant pipe, 31 is a cold storage low-pressure side refrigerant pipe, 32 is an air-conditioning high-pressure side refrigerant pipe, and 33 is an air-conditioning low-pressure side refrigerant pipe. Connected to the mouth.

FIG. 3 is a view showing the cooling unit 15 of the present invention, in which an air flow path 20 communicating with the air outlet 19 is formed in an upper part inside the case 16. This air channel 2
A centrifugal blower 21 driven by a motor 21a is arranged so as to be positioned within 0. This air flow path 20
A compartment 22 for installing a cooler is defined in the lower part of the compartment 22. The cooler evaporator 10 for cold storage described above is formed in the compartment 22.
A cold storage pack 23 cooled by the evaporator 10 is installed.

Here, as shown in FIG. 4, the evaporator 10 is constructed by using a multi-hole flat tube 10a made of aluminum in this example. The multi-hole flat tube 10a is formed in a flat cross section having a width dimension equivalent to the width dimension L of the cold storage pack 23 (see FIG. 3A), and as is well known, a large number of holes for refrigerant passages are formed in parallel. Has been done. The flat tube 10a has bent portions at the upper and lower ends as shown in FIG. 4, and is formed so as to meander in the vertical (up and down) direction. Therefore, the flat surface of the flat tube 10a is oriented in the vertical direction. Note that 10b and 10c are refrigerant inlet and outlet pipes.

The cold storage pack 23 is arranged so as to be in close contact with the flat surfaces on both the left and right sides of the flat tube 10a of the refrigerant evaporator 10. As shown in the figure, the cold storage pack 23 is formed in a vertically long uneven shape in the vertical direction,
A thin pack-shaped (bag-shaped) member formed of resin is filled with water or a soft gel-like cold storage material.
Further, as the material of the pack 23, a material that is easily thinned, such as polyethylene or nylon, is preferable in order to improve heat exchange with the blown air.

In FIG. 4, reference numeral 24 denotes a recessed portion 23a of the uneven storage pack 23 and the flat tube 1 of the refrigerant evaporator 10.
A large number of air channels are formed in parallel with each other in the horizontal direction in the air flow path formed between the flat surface of 0a. The arrow in FIG. 3 indicates the case 16
2 shows a state in which the air in the nap chamber 14 that has flowed in from the suction port 18 at the lower part of the front surface flows through the air flow path 24 toward the upper side of the rear part of the case.

On the upper side of the evaporator 10, there is arranged an upper pressing plate 167 made of resin (see FIG. 3A) which fits and holds the U-shaped bent portion of the upper portion of the flat tube 10a. A communication port 167 a that communicates the upper part of the chamber 22 with the suction side of the blower 21 is opened at the rear side portion of the upper pressing plate 167. This upper holding plate 1
The blower 21 is disposed above the 67, and the air outlet 19 is disposed at the air outlet of the blower 21.

An auxiliary plate 160b is attached to the upper front portion of the case 16, and the auxiliary plate 160b is attached.
The air outlet 19 is opened and the operation panel 160c of the cooling unit 15 is attached to the side of the air outlet 19. The blower 2 is provided on the operation panel 160c.
1 control switch and the like are provided. Evaporator 1
On the lower side of 0, a resin support plate 168 for fitting and holding the lower U-shaped bent portion of the flat tube 10a is arranged. The support plate 168 has an inclined surface 1 for discharging drain water generated in the cold storage pack 23 portion during cooling.
68a and a drain water outlet 168b are provided.

Next, the assembling structure of the case 16 of the cooling unit 15 will be described with reference to FIG. 5. The case 16 includes a resin front case 160, a resin rear case 161, and a resin body case 162. The main body case 162 has a built-in cold storage pack 23, a cold storage evaporator 10, a blower 21 (not shown in FIG. 5), and the like, and is formed in a rectangular frame shape for supporting them.

The front case 160 is connected to the front opening side of the body case 162 so as to close the front opening side of the body case 162. The upper opening 160d of the front case 160 (see FIG. 5) is formed by the auxiliary plate 16 described above.
0b is fitted and attached. The rear surface case 161 is coupled to the rear surface opening side of the main body case 162 so as to close the rear surface opening side of the main body case 162. The body case 162 is configured as an outer case that is not covered with the front case 160 and the rear case 161, but is exposed to the outside as it is.
The outer surface of 2 constitutes a design surface that is directly visible from the outside.

By providing reinforcing ribs on the inner side surface of the main body case 162 which is not the design surface, or by increasing the plate thickness of the main body case 162, it is possible to support heavy objects such as the cold storage pack 23 and the cold storage evaporator 10. It is designed to ensure strength. Further, a concave-convex fitting surface is formed at the joint between the main body case 162 and the front case 160 and the rear case 161. Specifically, band-shaped protrusions 160a and 161a are formed on the joints on the front case 160 and the rear case 161, and the protrusions 1 are formed on the joint on the main body case 162 side.
A concave groove portion 162a into which the 60a and 161a are fitted is formed. Then, the main body case 162 and the front case 160
The rear case 161 and the rear case 161 are detachably fastened and fixed with screws (not shown).

It is preferable to dispose a heat insulating material (not shown) on the inner surfaces of the cases 160, 161, 162 to enhance heat insulation between the inside and outside of the case. By the way, FIG. 6 shows a comparative example that the inventors of the present invention have made by trial. In this comparative example,
The front case 160 and the rear case 161 are directly coupled to each other, and a skeleton is provided inside the two cases 160 and 161 to secure strength for supporting heavy objects such as the cold storage pack 23 and the cold storage evaporator 10. Members 163-166 are arranged. Here, the skeleton members 163-166 are integrally formed of resin.

In the above-described comparative example, the front case 160 and the rear case 161 are directly coupled to each other, and the skeleton members 163 to 166 for supporting heavy objects are built inside the front case 160 and the front case 160. The depth dimensions x and y of the rear case 161 are considerably larger than the depth dimensions X and Y of the front case 160 and the rear case 161 of the first embodiment.

As a result, in the comparative example, the front case 160 is used.
Also, when molding the rear case 161 with resin, the molding die becomes large and the slide amount of the movable die also becomes large, so that the molding die and the molding machine become large in size, and the manufacturing cost thereof rises. In contrast, the first
In the embodiment, the depth dimensions X and Y of the front case 160 and the rear case 161 can be made significantly smaller than those of the comparative example, so that the manufacturing costs of the molding die and the molding machine can be significantly reduced.

Next, the operation of the first embodiment having the above structure will be described. When an air conditioner switch (not shown) is turned on while the truck is running (the engine is operating), the electromagnetic clutch 1a is energized, the compressor 1 is connected to the vehicle engine via the electromagnetic clutch 1a, and the compressor 1 is driven by the engine. ,Operate. By the operation of the compressor 1, the refrigerant circulates in the refrigeration cycle of FIG. That is, since the solenoid valve 4 is a normally open type, the refrigerant circulates through the solenoid valve 4 to the air-conditioning refrigerant circuit 7, and the blower air of the blower of the air-conditioning unit 13 is cooled and dehumidified by the air-conditioning evaporator 6. Then, the air conditioning of the truck cab 12 is performed.

At this time, the constant pressure expansion valve 9 of the cold storage refrigerant circuit 8 does not lower its downstream pressure to a predetermined pressure (for example, in the case of the refrigerant R134a, 1.0 Kg / cm ² , evaporation temperature: -10 ° C). Therefore, keep the valve closed. When a cold storage switch (not shown) is turned on while the truck is running, the solenoid valve control circuit is started, and an energization signal is input from the control circuit to the solenoid valve 4 at predetermined time intervals.
Closes the valve for a short time at predetermined time intervals. Then, the refrigerant to the air-conditioning refrigerant circuit 7 is shut off, so that the refrigerant suction action of the compressor 1 causes the pressure of the cold-storage refrigerant circuit 8 to rapidly decrease to the predetermined pressure or less, and the constant pressure expansion valve 9 opens. Speak. Since the constant pressure expansion valve 9 is opened intermittently only for a short time, the influence on the cooling action of the air conditioning evaporator 6 is extremely small.

The cold storage evaporator 10 serves to cool the cold storage pack 23 by supplying the refrigerant by intermittently opening the constant pressure expansion valve 9 to freeze the cold storage material (water or the like) in the cold storage pack 23 to store the cold. Keep it. On the other hand, when a driver or the like takes a nap in the nap room 14 during truck parking, the speed control lever of the blower 21 provided on the operation panel 160c for cooling the nap room is operated to operate the blower 21 using the vehicle battery as a power source. Let

Then, from the suction port 18 provided in the front case 160 of the case 16 of the cooling unit 15 to the nap room 1.
4 is drawn into case 16, and case 1
Blast air flows through the inside of 6 along the path indicated by the arrow in FIG. The blown air exchanges heat with the cold storage pack 23 when passing through the air flow path 24 between the cold storage pack 23 and the evaporator 10, and is cooled to become cold air, which is the communication port 167a and the air flow path 20. Through the air outlet 19 into the nap room 14 to cool the nap room 14.

Until the cold storage material in the cold storage pack 23 is completely melted and the temperature rises, the nap room can be cooled during parking. (Second Embodiment) FIGS. 7 and 8 show the second embodiment, and in the same manner as in the first embodiment, the case 1 is used in the second embodiment.
6 is divided into a front case 160, a rear case 161, and a main body case 162.

In FIG. 8, a and b are front case 160.
And convex portions 160a, 161a on the rear case 161 side
(See FIG. 5) and the concave groove portion 162a on the body case 162 side.
(See FIG. 5) FIG. C is the main case 1
62 shows a screw stop portion between the front case 160 and the rear case 161. In the first embodiment, the case 16 including the front case 160, the rear case 161, and the main body case 162 constitutes the entire case.
In the embodiment, the auxiliary case 170 is provided on the upper part of the case 16.
The blower 21 is built in the auxiliary case 170.

The auxiliary case 170 includes a front case 171,
It is composed of a main body case 172, a rear case 173, and an upper case (not shown). By removing the upper case upward, the blower 21 can be easily taken out upward. As a result, the blower 21 can be easily maintained and inspected. The front case 171 of the auxiliary case 170 is provided with the air outlet 19 and the operation panel 160c.

Therefore, in this example, when the blower 21 is operated, the cold air cooled by the cool storage pack 23 in the case 16 is sucked into the blower 21 intake side in the auxiliary case 170, and the nap chamber 14 is blown from the blowout port 19. Blow out inside. (Third Embodiment) FIG. 9 and FIG. 10 show the third embodiment. In the third embodiment, the case 16 includes a front case 160, a rear case 161, and a main body case 162 as in the first embodiment. In the case of the above configuration, the front case 160 and the rear case 161 are devised so as to be resin-molded by a common molding die.

That is, in this example, the outer shapes of the front case 160 and the rear case 161 have the same shape (symmetrical shape) as shown in FIG. Further, as the air suction port 18 is opened near the lower end of the front case 160, the high pressure of the cold storage evaporator 10 is provided near the lower end of the rear case 161 at a portion corresponding to the air suction port 18. Side, the outlet port 161b of the low pressure side refrigerant pipes 30 and 31 is opened.

As shown in FIG. 10, the air intake port 18 is wider than the pipe outlet port 161b, and the upper end position of the air intake port 18 is set higher than the upper end position of the pipe outlet port 161b. There is. As described above, the front case 160 and the rear case 161 can be resin-molded with a common molding die by combining a nesting line (not shown) having a size shown by the nesting line in FIG. 10 in the molding die.

That is, when the front case 160 is molded, the air intake port 18 is formed by forming the shape of the air intake port 18 in a nest having a line size at the portion of the air intake port 18. Can be molded, and
The upper opening 160d can be molded by using a line-shaped nest in the upper opening 160d.

When the rear case 161 is formed, the pipe outlet 161b can be formed by forming the pipe outlet 161b in a nest having a line size. In this way,
The front and rear two cases 160 and 161 can be resin-molded with a common molding die, and as a result, the die cost can be further reduced. (Fourth Embodiment) FIG. 11 shows a fourth embodiment.
In the fourth embodiment, the front and rear cases 160, 161 are provided by adopting the same case structure as that of the third embodiment.
In the above-mentioned one, the auxiliary case 170 in the second embodiment is provided in a resin mold which can be molded with a common molding die. That is, the fourth embodiment is a combination of the second embodiment and the third embodiment. (Other Embodiments) The present invention can be carried out in various modes other than the above-described embodiments, and for example, in a vehicle such as a 1-box car other than a truck, the space behind the passenger compartment is parked. The device of the present invention may be used for applications such as cooling the engine by stopping the engine from time to time.

The flat tube 1 is used as the evaporator 10.
In addition to a type in which 0a is bent in a meandering shape, a large number of linear flat tubes 10a are arranged in parallel, and a refrigerant inlet / outlet tank is arranged at both ends of the parallel arranged flat tubes 10a (generally, (Called a multi-flow type) may be used. Further, in the above-described embodiment, the concave-convex fitting portion (160a, 161a, 162a) is provided in the joint portion of the cases 160, 161, 162, but the heat insulation provided on the inner surface of these cases 160, 161, 162 When water leakage to the outside of the case can be prevented by a material or the like, the concave-convex fitting portion (160a, 161) is used.
a, 162a) are abolished and cases 160, 161, 1
The connecting portion of 62 may be a simple planar crimping surface.

[Brief description of drawings]

FIG. 1 is a cycle diagram showing a refrigeration cycle according to a first embodiment of the present invention.

FIG. 2 is a schematic explanatory view showing a vehicle installation form of the cooling unit according to the first embodiment.

3A is a side view of the cooling unit shown in FIG. 2, and FIG.
[Fig. 3] is a front view of (a).

FIG. 4 is a front view showing an assembling relationship between a cool storage evaporator and a cool storage pack in a cooling unit.

FIG. 5 is an exploded perspective view showing a disassembled case of the cooling unit.

FIG. 6 is an exploded perspective view showing a disassembled case of a cooling unit as a comparative example.

FIG. 7 is a front view of a cooling unit according to a second embodiment.

FIG. 8 is a side view of FIG. 7;

FIG. 9 is an exploded perspective view showing a disassembled case of the cooling unit according to the third embodiment.

FIG. 10A is a front view of a front case of a cooling unit according to a third embodiment, and FIG. 10B is a front view of a rear case.

FIG. 11 is a front view of a cooling unit according to a fourth embodiment.

[Explanation of symbols]

10 ... Evaporator for cold storage, 10a ... Tube, 14 ...
Nap room, 15 ... Cooling unit, 16 ... Case, 16
0 …… front case, 161 …… rear case, 162 ……
Main body case, 18 ... Intake port, 19 ... Outlet port, 21 ...
… Blower, 20, 24 …… Air flow path, 23 …… Cold storage pack.

Claims (4)

[Claims] 1. A case (16) made of resin, a pack-shaped member (23) housed in the case (16) for storing a cold storage material, and a pack-shaped member housed in the case (16). A heat storage heat exchanger (10) for cooling the member (23), an air flow path (24) formed in the case (16) so as to exchange heat with the pack-shaped member (23), and the case (16) is installed in the air passage (2
4) is provided with a blower means (21) for blowing air, and the cool air cooled by the pack-shaped member (23) is configured to be blown out to a cooling target site by the blower means (21). The case (16) includes the pack-shaped member (23) and the heat exchanger (1) for cold storage.
0) and the blower means (21), and a frame-shaped main body case (162) for supporting them, and the main body case (162) so as to close the front opening side of the main body case (162). A front case (160) coupled to the front opening side of the main body case (162) and a rear case (161) coupled to the rear opening side of the main body case (162) so as to close the rear side opening side of the main body case (162). And a regenerator type cooling device. 2. Concavo-convex fitting surfaces (160a, 161a, 162) at the joint between the main body case (162) and the front case (160) and the rear case (161).
The regenerator type cooling device according to claim 1, wherein a) is formed. 3. The front case (160) and the rear case (161) have the same outer shape, and
An air intake port (18) is opened in the vicinity of the lower end of the front case (160), and in the vicinity of the lower end of the rear case (161) for cold storage in a portion corresponding to the air intake port (18). The regenerator system according to claim 1 or 2, wherein the cooling medium circulation pipes (30, 31) of the heat exchanger (10) are provided with outlets (161b). 4. The cool storage air conditioner according to claim 1 is arranged in a predetermined area (14) in a vehicle compartment, and cool air cooled by the pack-shaped member (23) is supplied to the vehicle. A regenerative cooling system for a vehicle, characterized in that it is configured to blow out to a predetermined area (14) in the room.