JPH01142379A - Atmosphere controller - Google Patents

Abstract

PURPOSE: To cool indoor at a desired temperature quickly and reduce the changing rate of heat in a circulated water, by forming a liquid route to cool a circulated water for indoor air cooling by refrigeration cycle of switchable two liquid routes having different volumes. CONSTITUTION: The liquid circulating route 320 of a humidifying/cooling device 300 for cooling/humidifying an air in the indoor 220 is provided with a first liquid route 322 and a second liquid route 323 having a smaller volume than the first liquid route, and both liquid routes can be switched by a three-way branch valve 324. The water in the liquid circulating route 320 with small volume is switched to the second liquid route 323 when the indoor is cooled quickly when the switch is turned on, and it is cooled quickly at a low temperature by an evaporator 410. Thus, the second liquid route is used to cool the indoor quickly at the start of operation, and the first liquid route is used ordinarily, so that the chaging rate of heat of circulated water can be reduced.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is an atmosphere management method that humidifies a room and controls the temperature of the room by spraying a cooled or heated liquid onto the air blown into the room. Regarding equipment.

[Prior art] As a conventional device of this type, Tokukosho! The one shown in Japanese Patent No. 17-55117 is known. This known technology includes a gas-liquid spray contact device that sprays a liquid cooled by a refrigeration cycle or the like into the air, and blows low-temperature air humidified by the gas-liquid spray contact device into a room such as a refrigerator. It humidifies the room and controls the temperature inside the room.

As shown in FIG. 5, the part of this device that cools the liquid is a circulation path for the liquid that is collected in the gas-liquid spray contact bag '111 and is again ejected from the spray port 2 in the gas-liquid spray contact device 1. 3
A cooler 5 of a gas refrigeration cycle is installed inside a tank 4, and the air flowing through the cooler 5 removes heat from the liquid in the tank 4 to cool the liquid in the tank 4. .

[Problems to be Solved by the Invention] However, immediately after starting the refrigeration cycle and starting cooling of the liquid, the temperature of the liquid in the tank 4 cannot be rapidly cooled.

For this reason, the device that cools the room using high-humidity, low-temperature air blown out from the gas-liquid spray contact device 1 has the problem that the room cannot be cooled quickly.

In addition, if the volume of the tank 4 is reduced and the liquid is quickly cooled by the cooler 5, the capacity of the liquid in the circulation path 3 circulating via the gas-liquid spray contact bag f1 is small. As a result, the thermal fluctuation rate of the liquid increases, the frequency of turning on and off the refrigeration cycle increases, and the durability and performance of the refrigeration cycle deteriorates.

The present invention has been made in view of the above circumstances, and its purpose is to provide an atmosphere control device that can quickly change the temperature of a room to a desired temperature and that can suppress the fluctuation rate of circulating heat to a small level. be.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes: a room that is insulated from the outside; an air circulation path that sucks air from the room and blows the sucked air back into the room; comprising a spray port that sprays a liquid into the air flowing in the air circulation path,
a liquid circulation path comprising a first liquid passage for guiding the liquid collected below the spray nozzle back to the spray nozzle; and a second liquid passage having a smaller volume than the first liquid passage; and a liquid temperature adjusting means for cooling or heating the liquid in the second liquid passage, and a switching means for switching between the liquid passing in the first liquid passage and the liquid passing in the second liquid passage. as a technical means.

[Operations and Effects of the Invention] The present invention having the above-mentioned configuration can:
The switching means is operated to spray the liquid that has passed through the second liquid passage into the air flowing in the air circulation path, and the liquid in the first liquid passage and the second liquid passage is cooled (or heated) by the liquid temperature adjustment means. ), the volume of the second liquid passage is formed smaller than the volume of the first liquid passage,
The liquid in the second liquid passage is cooled (or heated) faster than the liquid in the first liquid passage in response to the temperature change of the liquid temperature control means. If a quick change is desired, the air flowing in the air circulation path is cooled (or heated) and humidified by passing through a second liquid path and receiving a spray of cooled (or heated) liquid; It is then blown out into the room.

As a result, the room is rapidly cooled (or heated) with high humidity.
This makes it possible to quickly humidify and cool (or heat) the air.

Further, after the liquid in the first liquid passage is cooled (or heated) by the liquid temperature adjustment means, the switching means is operated to change the liquid passing through the first liquid passage to the air flowing in the air circulation path. Spray. The first liquid passage has a larger volume than the second liquid passage, so the fluctuation in heat is small, and when the liquid temperature adjustment means for cooling (or heating) the liquid is turned on,
The frequency of turning off can be reduced.

As a result, the durability of the temperature regulating means can be improved.

[Example] Next, an atmosphere control device of the present invention will be described based on an example shown in the drawings.

FIG. 1 shows a schematic diagram of an atmosphere management bag 9110G mounted on a vehicle 200.

The vehicle 200 is a refrigerated vehicle for transporting fresh foods such as vegetables and fruits, and living organisms such as yeast, and is equipped with a cold storage 210 insulated from the outside at the rear.

The room 220 inside this cold storage 210 has an atmosphere management device 1.
Humidified and cooled by 0G.

This atmosphere management device 100 includes a humidifying cooler 300 that sucks air in a room 220, humidifies and cools the sucked air, and blows it out into the room again, and a humidifying cooler 300 of the present invention that cools water circulating inside the humidifying cooler 300. It is composed of a refrigeration cycle 400 which is a liquid temperature adjusting means.

The humidifying cooler 300 includes an air circulation path 310 that sucks air in a room 220 and blows the sucked air back into the room, and a spray port 321 that sprays a liquid into the air flowing in this air circulation path 310. A liquid circulation path 320 is provided for guiding the liquid collected below the port 321 to the spray port 321 again.

The air circulation path 310 is a cylinder with an air inlet 311 on the lower side and an air outlet 312 on the upper side. A blower 313 for blowing air from 312 is attached. Further, the air outlet 312 is equipped with a filter 314 that separates large water particles contained in the air passing through the air outlet 312 and allows only gas to pass through.

The liquid circulation path 320 exchanges heat with the water stored in the lower part of the air circulation path 310 with the refrigerant evaporator 410 of the refrigeration cycle 400 and guides it to the spray port 321.
The heat exchange section with the first liquid passage 322 and the first
A second liquid passage 323 having a smaller volume than the liquid passage 322 is provided.

The first liquid passage 322 is a tank containing a refrigerant evaporator 410 in which a tube is spirally wound or bent in a meandering manner. Further, the tube of the refrigerant evaporator 410 has a double piping structure as shown in FIG. 2, and the refrigerant flows through the inner periphery of the tube. In this embodiment, the outer periphery of the double pipe is the second liquid passage 323.

The upstream sides of the first liquid passage 322 and the second liquid passage 323 join together via a three-way branch valve 324. This three-way branch valve 324 communicates between the first liquid passage 322 and its upstream side when not energized, and communicates between the second liquid passage 323 and its upstream side when energized, and is energized by the electric circuit 500 described above. Ru. A pump 325 is provided upstream of the three-way branch valve 324, and when the pump 325 is energized and operated, the water stored in the lower part of the air circulation path 310 is transferred to the first liquid path 322 or the second liquid path 322. The liquid passes through the liquid passage 323 and is sprayed downward from the spray port 321.

The refrigeration cycle 400 receives power from a vehicle running engine (not shown) by turning on and off an electromagnetic clutch 421, and includes a refrigerant compressor 420 that compresses and discharges refrigerant, a refrigerant condenser 430 that liquefies and condenses the refrigerant, and a receiver 440.
, decompression device fi45G, the refrigerant flowing inside takes heat from the water in the first liquid passage 322 and the second liquid passage 323 and evaporates, and the first liquid passage 322 and the second liquid passage 3
This is a well-known device consisting of the above-mentioned refrigerant evaporator 420 that cools the water in the evaporator 23, and is connected by a refrigerant pipe 460.

Above, blower 313, three-way branch valve 324, pump 325
, the electromagnetic clutch 421 is connected to an electric circuit 500 shown in FIG.
The energization is controlled by. The electric circuit 500 includes a control circuit 510 that is activated by turning on the operation switch 501 operated by the user.
11. The temperature sensor 512 that detects the temperature in the room 220 controls the relay coils 521 to 524 to turn the relay switches 531 to 534 ON-〇F, and the blower 313, three-way branch valve 324, pump 325, and electromagnetic The clutch 421 is energized and controlled. In the drawing, reference numeral 54G indicates an on-vehicle battery, reference numeral 550 indicates a key switch, and reference numeral 560 indicates a fuse for protecting the circuit from overcurrent.

Next, the operation of the control circuit 51G will be explained based on the flowchart shown in FIG.

When the operation switch 501 is turned on, in step S1, the temperature of the room 220 detected by the temperature sensor 512 is set to a first setting higher than the temperature set by the temperature setting device 511 by a predetermined temperature (for example, 2 degrees higher temperature). Temperature (e.g. 7℃
) to determine whether it is higher than the current value.

If this judgment result is YES, in step S2,
Relay coils 521 to 524 are energized and air is blown 8!131
3, pump 325, electromagnetic clutch 421, three-way branch valve 3
24 is energized, and then the process returns to step S1.

Further, if the determination result in step S1 is NO, in step S3, the indoor temperature detected by the temperature sensor 512 is
20 is higher than the second set temperature (for example, 5° C.) set by the temperature setting device 511. If the result of this judgment is YES, in step S4, the relay coils 521 to 523 are activated. energized, relay coil 524
is de-energized, the blower 313, pump 325, and electromagnetic clutch 421 are energized, the three-way branch valve 324 is de-energized, and then the process returns to step $1.

Further, if the determination result in step S3 is NO, in step S5, relay coils 521 and 522 are energized, relay coils 523 and 524 are de-energized, blower 313 and pump 325 are energized, and electromagnetic clutch 421 is energized.
, the three-way branch valve 324 is de-energized, and then step S1
Return to

Next, the operation of the above embodiment will be explained.

When the user turns on the operation switch 501, the indoor
The blower 313 and pump 325 are energized regardless of the temperature at zero. By energizing the blower 313, the air circulation path 31G is connected to the room 220 from the lower air inlet 311.
The sucked air flows upward in the air circulation path 310 and is blown out from the air outlet 312 into the room 220 again. In addition, when the pump 325 operates, the water accumulated in the lower part of the air circulation path 31G is
The first liquid passage 32 depending on the energization state of the three-way branch valve 324.
The liquid passes through the second or second liquid passage 323 and is ejected downward from the spray port 321 in opposition to the flow direction of the air passing through the air circulation path 310.

As a result, the air discharged from the air outlet 312 is humidified by the water jetted from the spray nozzle 321 while passing through the air circulation path 310, and large droplets of water are removed by the filter 314, and the air is combined with the humidified air. and is blown out into the room 22G.

b) Immediately after starting refrigeration of the indoor 220, etc.
When the temperature is higher than the first set temperature.

The operation of the electric circuit 500 energizes the soil, the air blower 313, and the pump 325, as well as the electromagnetic clutch 421 and the three-way branch valve 324.

When the electromagnetic clutch 421 is energized, the refrigerant compressor 420 is driven by the rotation of the engine, and the refrigerant passing through the refrigerant evaporator 410 absorbs heat from the water in the first liquid passage 322, the second liquid passage 323, and so on. The water in the first liquid passage 322 and the second liquid passage 323 is cooled.

At this time, by energizing the three-way branch valve 324, the water stored in the lower part of the air circulation path 310 passes through the second liquid path 323, and the air flow passes through the air circulation path 310 from the spray port 321. It is ejected against the direction.

The second liquid passage 323 is provided on the outer periphery of a double pipe of tubes constituting the refrigerant evaporator 410, and its volume is very large compared to the first liquid passage 322. Because it is directly cooled by
The water passing through the second liquid passage 323 is
23, it is sufficiently cooled.

As a result, the air passing through the air circulation path 31G is
The water passes through the liquid passage 323 and is sprayed, cooled, and blown into the room 220. As a result, indoor 2
20 is quickly humidified and cooled by the humidified and cooled air blown out from the air circulation path 310.

口) The temperature in the room 220 is cooled to below the first set temperature,
In addition, when the temperature is higher than the second set temperature.

By the operation of the electric circuit 500, the blower 313, the pump 325, and the electromagnetic clutch 421 are energized, and the three-way branch valve 324 is de-energized.

Similarly to the above, when the electromagnetic clutch 421 is energized, the refrigerant evaporator 41G cools the water in the first liquid passage 322 and the second liquid passage 323. After startup, indoor 22G is the first
While the temperature drops below the set temperature, the water in the first liquid passage 422 having a large volume is being cooled and is further cooled by the refrigerant evaporator 410.

At this time, by de-energizing the three-way branch valve 324,
Water stored in the lower part of the air circulation path 31G passes through the first liquid path 322 and is ejected from the spray port 321 against the flow direction of the air passing through the air circulation path 31G.

As a result, the air passing through the air circulation path 310 is
The liquid passes through the liquid passage 322 and is sprayed with cooled water, cooled and blown out into the room 22G. As a result, indoor 2
20 is an air circulation path 31. The humidified and cooled air blown out from O is further humidified and cooled toward the second set temperature.

c) When the temperature in the room 220 is cooled to below the second set temperature.

As the electric circuit 500 operates, the blower 313 and the pump 325 are energized, and the three-way branch valve 324 and the electromagnetic clutch 421 are de-energized.

When the electromagnetic clutch 421 is de-energized, cooling of the water in the first liquid passage 322 and the second liquid passage 323 is stopped by the refrigerant evaporator 410, but while the indoor temperature 220 is lowered to below the second set temperature, , the water in the first liquid passage 422 having a large volume is sufficiently cooled.

At this time as well, the three-way branch valve 324 is de-energized, so that the water stored in the lower part of the air circulation path 310 passes through the first liquid path 322 and enters the air circulation path 310 from the spray port 321.
It is ejected against the flow direction of the air passing through it.

As a result, the air passing through the air circulation path 31G is
The water passes through the liquid passage 322 and is sprayed and cooled by the cooled water and is blown into the room 220. As a result, indoor 2
20 continues to be humidified and cooled by the humidified and cooled air blown out from the air circulation path 310.

According to this embodiment, when the temperature in the room 220 is not quickly cooled to the target temperature, such as immediately after startup, the air flowing in the air circulation path 310 is humidified and cooled by water passing through the second liquid path with a small volume. By blowing out into the room 22G, the temperature of the room 220 can be quickly humidified and cooled.

In addition, since the temperature in the room 220 has fallen below the first set temperature, the air flowing in the air circulation path 310 is humidified and cooled by the water that has passed through the first liquid passage 322 having a large volume in the room 220, and the air inside the room is cooled. By blowing it out to 220, the temperature fluctuation of the water circulating in the liquid circulation path 320 can be suppressed, and the temperature fluctuation in the room 220 can also be suppressed. As a result, the durability of the refrigeration cycle 400 can be improved.

(Modified Example) In the above embodiment, a refrigeration cycle that cools water by evaporating the refrigerant was used as an example of a means for cooling the water in the first liquid passage and the second liquid passage, but compressed gas A refrigeration cycle may be used in which heat is removed from the surrounding area by expanding the fat.

Although an example has been shown in which the first liquid passage and the second liquid passage are cooled, the refrigeration cycle is provided with refrigerant discharge direction switching means such as a four-way valve, and the water in the first liquid passage and the second liquid passage is cooled by the refrigeration cycle. Heating, hot water heater,
The water in the first liquid passage and the second liquid passage may be heated using an electric heater to humidify and heat the interior of the room.

An example has been shown in which a three-way branch valve is used as a switching means for switching between the liquid passing through the first liquid passage and the liquid passing through the second liquid passage. A solenoid valve may be provided upstream of each passage, and the switching may be performed by controlling the energization of the solenoid valve, or by a manually operated valve.

Although an example is shown in which the air circulation path is provided indoors, it may also be provided outdoors.

Although an example in which the atmosphere control device is mounted on a vehicle has been shown, the present invention may also be applied to a refrigerator, a treasury, or the like.

Although an example has been shown in which water is sprayed into the air flowing through the air circulation path, it is also possible to spray a liquid with a lower freezing point that does not harm stored items such as food, such as water with sugar added thereto.

Although we have shown an example in which the second liquid passage is one side of the double piping,
The present invention is not limited to this example, and may be a small-capacity tank containing a refrigerant evaporator (liquid temperature control means).

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of the atmosphere management device of the present invention mounted on a vehicle, Fig. 2 is a partial sectional view of the refrigerant evaporator and the second liquid passage, Fig. 3 is an electrical circuit diagram, and Fig. 4 is a control circuit diagram. FIG. 5 is a flowchart showing an example of control, and is a schematic diagram showing main parts of a conventional atmosphere management device.

Claims (1)

[Claims] (a) A room that is insulated from the outside; (b) an air circulation path that sucks air from the room and blows the sucked air back into the room; (c) an air circulation path that is insulated from the outside; A spray port for spraying a liquid into the flowing air, a first liquid passageway for guiding the liquid collected below the spray port back to the spray nozzle, and a second liquid passageway having a smaller volume than the first liquid passageway. (e) a liquid temperature adjusting means for cooling or heating the liquid in the first liquid passage and the second liquid passage; (f) a liquid circulating in the first liquid passage and the liquid passing through the first liquid passage; An atmosphere management device comprising: switching means for switching the liquid passing through the second liquid passage.