JPH01174875A - Heat exchanger - Google Patents

Abstract

PURPOSE:To again bring sprayed liquid dripped from a plurality of holes into contact with gas, and to improve heat exchanging efficiency of the gas with the liquid by spirally turning the flow of the gas along a turning promotor, and opening a plurality of holes at the promotor. CONSTITUTION:Spraying nozzles 14 are disposed against an air stream spirally flowing toward an air discharge port 9 from an air inlet 8 on a passage 12 formed in a case 4 by a turning promotor 11 thereby to increase relative speed of water sprayed from the nozzles 14 and the air flowing through the passage 12, thereby improving thermal exchanging efficiency of the water with the air. In order to drip water droplets adhered to the promotor 11, a plurality of pores 17 are suitably opened over the whole promotor 11, and since the sprayed water is dripped from the pores 17 to be again brought into contact with the air after the water sprayed from the nozzles 14 is brought into contact with the air flowing through the passage 12 to be heat exchanged, the contact air of the water with the air is increased, thereby improving the heat exchanging efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a heat exchange device for controlling the temperature and humidity of air inside a warehouse in which fresh foods such as vegetables and fruits are stored.

[Prior Art] Conventionally, fresh foods such as vegetables and fruits, or living organisms such as yeast, are stored in a cold storage such as a refrigerator that is maintained at a predetermined low temperature. However, when the air inside the cold storage is cooled by, for example, exchanging heat with a refrigerant circulating in a refrigeration cycle, the air inside the cold storage is dehumidified.

In addition, the inside of the cold storage is constantly kept dry due to the amount of heat contained in the stored materials and the influence of the outside air, and there is a problem in that the stored materials inside the cold storage gradually lose moisture and become dry, losing their freshness. .

Therefore, in order to solve these problems,
-22063 is publicly known. In this bulletin, the air inside cold storage cabinets that store fresh foods such as vegetables and fruits is
For example, when controlling low temperature and high humidity, the air inside the refrigerator is led to a gas-liquid heat exchanger outside the refrigerator through pipes, etc., and a liquid (e.g. water) cooled to a predetermined temperature is added to the guided air. The temperature and humidity of the air inside the refrigerator is controlled by directly spraying it to control the humidity and temperature, and then sending it into the refrigerator again.

The above-mentioned gas-liquid heat exchanger includes a cylindrical container provided with an air inlet and an outlet that communicate with the inside of the cold storage through the above-mentioned pipe, etc.
The container is provided with a spirally formed screw blade and a plurality of liquid jet ports provided on the outer periphery of the hollow shaft portion of the screw blade. The air inlet and outlet are provided at the upper end of the container, and the hollow shaft of the screw blade is provided in communication with the outlet.

As a result, when the air that flows into the container from the inlet flows downward inside the container along the screw blades, liquid is sprayed against the air flow, and then the inside of the hollow shaft of the screw blades is sprayed. You will be led to the exit.

[Problems to be Solved by the Invention] However, in the above-mentioned known technology, in order to further improve the heat exchange efficiency between gas and liquid, it is necessary to enlarge the gas flow path formed by the screw blades to It is necessary to increase the contact area with the liquid. For this reason, the shape of the gas-liquid heat exchanger becomes large, and there are problems in that it becomes difficult to mount it on a vehicle or the like.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a heat exchange device with improved heat exchange efficiency between gas and liquid.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention includes a gas inlet and a gas discharge port, and spirally swirls the gas that has flowed in from the gas inlet into the interior. a case equipped with a spiral whirling promoter that leads to a discharge port; a spraying means for spraying a liquid onto the gas flowing along the whirling promoter;
and a heat exchange means for cooling or heating the liquid,
The technical means of the rotation promoter is that a plurality of holes are formed throughout.

[Operation] The present invention having the above-mentioned structure guides the temperature-controlled gas that has flowed in from the inlet of the case to the outlet of the case along the swirling promoter that swirls in a spiral, and at this time, the gas flows along the swirling promoter. A spraying means sprays a liquid whose temperature is controlled to a predetermined temperature by a heat exchanger in opposition to the gas, thereby exchanging heat between the gas and the liquid. Thereafter, the sprayed water droplets fall through the plurality of holes provided in the rotation promoter and come into contact with the gas again, thereby exchanging heat again.

[Effects of the Invention] According to the present invention, the gas flowing into the case flows along the swirling promoter that spirals, increasing the gas flow rate and spraying the liquid against the gas flow. By doing so, the relative velocity between the gas and the liquid can be increased.

In addition, the gas flow inside the case spirals along the rotation promoter, increasing the gas flow path length, and by opening multiple holes in the rotation promoter, the atomized liquid Since the liquid drips from the plurality of holes and comes into contact with the gas again, the contact area between the gas and the liquid increases.

As a result, the heat exchange efficiency between gas and liquid is improved compared to conventional equipment, and the heat exchange equipment can be made smaller and smaller.
It is possible to reduce the weight and improve the ease of mounting on vehicles.

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

Figure 1 is a schematic configuration diagram of the heat exchange device installed on the vehicle, Figure 2
The figure shows the tilted homeland of the heat exchanger that constitutes the heat exchange device.

The heat exchange device 1 of this embodiment is mounted on a vehicle 2 having a cold storage 2a for storing fresh foods such as vegetables and fruits.
A heat exchanger 3 for controlling the temperature and humidity inside the cold storage 2a is arranged inside the cold storage 2a.

As shown in FIG. 2, the heat exchanger 3 includes a cylindrical case 4 with an open bottom end, and a cylindrical water storage tank 5 with an open top end and a larger diameter than the case 4.

The case 4 is supported within the water storage tank 5 by a plurality of support legs 6 formed around the lower end of the case 4 .

A water pipe 7 that serves as an inlet for water used as the liquid of the present invention into the case 4 is inserted into the center of the upper end surface of the case 4, and the water pipe 7 reaches the lower part of the case 4. Note that the lower end of the water pipe 7 is closed.

An air introduction port 8 is formed in the upper side surface of the case 4 in the tangential direction of the case 4 for introducing the air in the cold storage 2a (the gas of the present invention) into the case 4. A donut-shaped space formed between the upper end opening surface of the water storage tank 5 and the outer periphery of the case 4 is an air outlet 9 for discharging the air introduced into the case 4 from the air inlet 8. becomes.

Note that a gas-liquid separation filter 10 is disposed in the air outlet 9 to allow only gas to pass through.

As shown in FIG. 2, a rotation promoter 11 is attached to the outer circumferential portion of the water pipe 7 inserted into the case 4, and rotates in a spiral shape while contacting the inner circumferential surface of the case 4.

A flow path 12 formed inside the case 4 by the rotation promoter 11 is for guiding the air introduced from the air introduction port 8 formed in the tangential direction of the case 4 to the air discharge port 9 while spirally swirling the air. It becomes an air flow path.

A blower 13 is disposed at the air inlet 8 to feed air into the flow path 12 formed in the case 4 .

As described above, since the air inlet 8 is formed in the tangential direction of the case 4 and the introduced air is guided to the air outlet 9 while spirally swirling, the length of the air flow path in the heat exchanger 3 is As the length increases, the air flow speed can be increased.

As shown in FIGS. 2 and 3, in the water pipe 7, from the upper part to the lower part on the outer periphery, an air flow is disposed facing the air flow spirally flowing from the air inlet 8 toward the air outlet 9. A plurality of spray nozzles 14 are attached.

This spray nozzle 14 is connected to a water pipe 7 as shown in FIG.
Since the lower end of the water pipe 7 is closed, the pump 15, which will be described later,
The water flowing into the water pipe 7 due to the operation of the spray nozzle 14
More sprayed.

In this way, by arranging the spray nozzle 14 to face the air flow spirally flowing from the air inlet 8 toward the air outlet 9, the water sprayed from the spray nozzle 14 and the air flowing through the flow path 12 are separated. The relative velocity between the water and the air increases, and the heat exchange efficiency between the water and the air can be improved.

An outlet 16 is formed in the center of the lower surface of the water storage tank 5 to allow water stored in the water storage tank 5 to flow out after being sprayed from the spray nozzle 14 .

Note that the rotation promoter 11 is provided with a rotation promoter 11 in order to drop water droplets attached to the rotation promoter 11.
A plurality of small holes 17 are appropriately opened throughout the area.

By opening this small hole 17, the water sprayed from the spray nozzle 14 and the air flowing through the flow path 12 come into contact and exchange heat, and then the sprayed water drips from the small hole 17 and air flows again. , the contact area between water and air increases and heat exchange efficiency can be improved.

As shown in FIG. The refrigerant compressor 21 is intermittently transferred to
The refrigerant compressed to high temperature and high pressure by the refrigerant compressor 21 is
Refrigerant condenser 23 that condenses and liquefies by receiving air from fan 22
and a pressure reducing device 24 made of a capillary tube that expands and discharges the refrigerant discharged from the refrigerant condenser 23 under reduced pressure;
A water-refrigerant heat exchanger 25 exchanges heat between the refrigerant discharged from the pressure reducing device 24 and the water in the water storage tank 5 described above, and a gas-liquid separation of the refrigerant discharged from the water-refrigerant heat exchanger 25 produces only gas refrigerant. and an accumulator 26 which discharges the refrigerant and sucks it into the refrigerant compressor 21, and each refrigerant pipe 27
connected by.

The water-refrigerant heat exchanger 25 has a cylindrical main body formed with a refrigerant flow path 28 connected to a refrigerant pipe 27, and the outer periphery of the refrigerant flow path 28 is filled with water that is circulated by the operation of the pump 15. has been done.

The heat exchanger 3, the water storage tank 5, and the water/refrigerant heat exchanger 25 are each connected via a pump 15 by a flowing water pipe 29, and the operation of the pump 15 causes each device (the heat exchanger 3, the water storage tank 5, Water circulates within the water-refrigerant heat exchanger 25).

Further, the spraying means of the present invention that sprays water against the air flow flowing through the flow path 12 formed in the case 4 is composed of a water flow pipe 7, a spray nozzle 14, and a pump 15.

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

The electromagnetic clutch 20 is energized to operate the refrigerant compressor 21. As the refrigerant compressor 21 operates, high-temperature, high-pressure refrigerant gas is supplied to the refrigerant condenser 23, and as it passes through the refrigerant condenser 23, it is condensed and liquefied by the air blown by the fan 22. The condensed and liquefied refrigerant is depressurized and expanded by the decompression device 24 and supplied to the water-refrigerant heat exchanger 25 .

In the water-refrigerant heat exchanger 25, when the depressurized and expanded refrigerant passes through the refrigerant passage 28 in the water-refrigerant heat exchanger 25, the water around the refrigerant passage 28 in the water-refrigerant heat exchanger 25 and heat It is exchanged, evaporated and discharged as a gaseous refrigerant. After the discharged refrigerant is separated into gas and liquid by the accumulator 26, only the gas refrigerant is sucked into the refrigerant compressor 21, and the above cycle is repeated thereafter.

The water cooled by heat exchange with the refrigerant in the water-refrigerant heat exchanger 25 flows through the water flow pipe 29 into the water flow pipe 7 of the heat exchanger 3 disposed in the cold storage 2a by the operation of the pump 15. . Since the lower end of the water pipe 7 is closed, the water flowing into the water pipe 7 is sprayed by the plurality of spray nozzles 14 due to the water pressure within the water pipe 7.

On the other hand, by operating the blower 13, the cold storage 2a
Air is introduced into the case 4 through the air inlet 8 of the heat exchanger 3, and flows downward into the case 4 while spirally swirling through the flow path 12 formed by the rotation promoter 11. At this time, the cold water sprayed from the plurality of spray nozzles 14 comes into contact with the air flowing through the flow path 12, exchanges heat with the air, and cools the air.

When the sprayed cold water drips into the water storage tank 5 from each small hole 17 of the rotation promoter 11, it comes into contact with the air flowing through the flow path 12 again and exchanges heat, thereby cooling the air. This improves the efficiency of heat exchange between cold water and air.

When the sprayed air containing moisture passes through a filter 10 disposed at the air outlet 9, excess moisture is removed, and the amount of water vapor is reduced to a saturated amount (or less than the amount of saturated water vapor) relative to the temperature of the air cooled by the cold water. is discharged as air containing moisture).

Thereafter, by repeating the above cycle, the inside of the cold storage [2a] can be controlled at a predetermined temperature and humidity.

The temperature and humidity control inside the cold storage 2a is controlled by the cold storage 2a.
This is done by detecting the temperature inside a and controlling the energization of the electromagnetic clutch 20.

As described above, the rotation promoter 11 has a plurality of small holes 17.
By opening the cold water, the cold water dripping from the plurality of small holes 17 comes into contact with the air again. Therefore, the contact area between cold water and air can be increased.

In addition, by forming the air inlet 8 of the heat exchanger 3 in the tangential direction of the case 4 and making the flow path 12 in the heat exchanger 3 spiral, the flow rate of the air flowing through the flow path 12 becomes faster. At the same time, since the configuration is such that the cold water is sprayed in opposition to the air flow flowing through the flow path 12, the relative velocity between the air and the sprayed cold water becomes large. As a result, the efficiency of heat exchange between air and cold water can be improved compared to devices according to the prior art, and the inside of the cold storage 2a can be set to a desired temperature and humidity in a short time.

In addition, since the heat exchange efficiency is improved, the heat exchanger 3 can be made smaller and lighter, and as illustrated in the example,
It is possible to improve the mountability when mounting on the vehicle 2.

FIG. 5 shows a second embodiment of the present invention.

In the first embodiment, the humidity of the air inside the cold storage 2a is controlled and the inside of the cold storage 2a is cooled. However, in this embodiment, the humidity of the air inside the cold storage 2a is managed and , a heat exchange device 1 that can cool or heat the inside of a cold storage box 2a will be explained.

In this embodiment, a four-way valve 31 is used in the refrigeration cycle 30 to switch the circulation direction of the refrigerant discharged from the refrigerant compressor 21. It is used to cool or heat the water that is exchanged with the water.

The configuration of the refrigeration cycle 30 of this embodiment will be explained.

A four-way valve 31 is provided downstream of the refrigerant compressor 21 to switch the flow direction of the refrigerant by controlling energization.

For example, when water is cooled in the water-refrigerant heat exchanger 25 through a passage selected by the four-way valve 31, the refrigerant compressor 2
The refrigerant discharged from the first heat exchanger 32 is supplied to the first heat exchanger 32, which functions as a refrigerant condenser, and is condensed and liquefied.

The refrigerant discharged from the first heat exchanger 32 passes through a check valve 33 disposed downstream of the first heat exchanger 32 and passes through a pressure reducing device 34 disposed upstream of the water-refrigerant heat exchanger 25. It is depressurized and expanded in the water-refrigerant heat exchanger 25, and heat exchanged with the water in the water-refrigerant heat exchanger 25.

The refrigerant discharged from the water-refrigerant heat exchanger 25 is
After being separated into gas and liquid by the accumulator 26 through the passage selected by , only the gas refrigerant is sucked into the refrigerant compressor 21, and the above cycle is repeated thereafter.

The cold water cooled by the water-refrigerant heat exchanger 25 is supplied to the heat exchanger 3 in the same way as in the first embodiment, and after being sprayed onto the air flowing through the flow path 12 to cool it, it is discharged into the cold storage 2a. By that,
The temperature and humidity inside the cold storage 2a are controlled.

Next, when heating water with the water-refrigerant heat exchanger 25,
The refrigerant discharged from the refrigerant compressor 21 passes through a passage selected by the four-way valve 31 and is supplied to the water-refrigerant heat exchanger 25, which functions as a refrigerant condenser.

Since the refrigerant supplied to the water-refrigerant heat exchanger 25 is compressed to a high temperature and high pressure, it heats the water in the water-refrigerant heat exchanger 25 when it exchanges heat with the water in the water-refrigerant heat exchanger 25. do.

The refrigerant that has undergone heat exchange with water is condensed and liquefied, and the pressure reducing device 34
It passes through a check valve 35 arranged in parallel with the check valve 33 and is supplied to a pressure reducing device 36 arranged in parallel with the check valve 33 . After being depressurized and expanded in the decompression device 36, it is supplied to the first heat exchanger 32, which functions as a refrigerant evaporator. The refrigerant discharged from the first heat exchanger 32 passes through a path selected by the four-way valve 31 and is separated into gas and liquid by the accumulator 26. Only the gas refrigerant is sucked into the refrigerant compressor 21, and the above cycle is then carried out. repeat.

The hot water heated by the water-refrigerant heat exchanger 25 is supplied to the heat exchanger 3, and after being sprayed onto the air flowing through the flow path 12 to warm it, it is discharged into the cold storage 2a. Control temperature and humidity.

As described above, by disposing the four-way valve 31 in the refrigeration cycle 30 and applying it as the refrigeration cycle 30 for heating and cooling,
The water circulating in the water-refrigerant heat exchanger 25 can be cooled or heated, and as a result, the humidity of the air in the cold storage 2a can be controlled and both cooling or heating can be performed.

(Modified example) In the above-described embodiment, the air inlet of the heat exchanger was formed in the tangential direction of the case, but by forming it in the tangential direction and at an angle from diagonally above, it is possible to Air flow speed can be increased.

Although the case where the heat exchange device of the present invention is mounted on a vehicle is illustrated, it may be used, for example, when controlling temperature and humidity inside a warehouse such as a factory or a residence.

Although water is used as the liquid to be sprayed into the air, by mixing antifreeze with water, the water can be cooled to below 0°C in a water-refrigerant heat exchanger, and the inside of the refrigerator can also be cooled to below 0°C. 2. As the antifreeze solution, use a sugar-sweetened solution that will not adversely affect the items stored in the cold storage.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the present invention.
The figure is a schematic configuration diagram of the heat exchange device of the present invention mounted on a vehicle.
Figure 2 is a perspective view of the heat exchanger that constitutes the heat exchanger;
The figure is a schematic sectional view of the heat exchanger showing the spray direction of the spray nozzle, Figure 4 is an enlarged view of the spray nozzle, and Figure 5 is the second embodiment of the present invention.
FIG. 1 is a schematic configuration diagram of a heat exchange device showing an example. In the diagram: 1...Heat exchange device 3...Heat exchanger 4...
・Case 7... Water pipe (spraying means) 11... Turning promoter 14... Spray nozzle (spraying means) 15.
... Pump (spraying means) 18 ... Refrigeration cycle (heat exchange means) 25 ... Water refrigerant heat exchanger Fig. 2 Fig. 3 Fig. 4 L

Claims (1)

[Scope of Claims] 1) A case including a gas inlet and a gas discharge port, and a spiral rotation promoter that spirally swirls the gas flowing in from the gas inlet and guides it to the discharge port. and a spraying means for spraying a liquid into the gas flowing along the swirl promoter, and a heat exchange means for cooling or heating the liquid, and the swirl promoter has a plurality of holes formed throughout. Features of heat exchange equipment. 2) The heat exchange device according to claim 1, wherein the spraying means sprays the liquid against the gas flowing along the rotation promoter.