JP2008267771A - Heat exchanger device and heat exchange system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger device and a heat exchange system which can carry out efficient heat exchange, and is compact in size and low in cost. <P>SOLUTION: The heat exchanger device 100 has a heat exchanger 5 having first passages 2 through each of which a heat exchange medium 1 flows, and second passages 4 through each of which a cooling fluid 3 flows; a mist generating means 6 generating and supplying mist 30 of the cooling medium into a lead-in passage 22 with one end 22A connected to the second passages 4 and with the other end 22B opened to the atmosphere, or into the second passages 4; and a negative pressure generating means 20 applying negative pressure to the exhaust side 4A of the second passages 4. The mist 30 is led into the heat exchanger 5 by negative pressure to efficiently take the heat of the heat exchange medium 1 with the heat of vaporization of the mist 30. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a heat exchange device that exchanges heat between a heat exchange medium and a cooling fluid, and more specifically, a heat exchange device that sprays a cooling fluid to exchange heat with the heat exchange medium, and the heat exchange device Related to the heat exchange system.

2. Description of the Related Art A heat exchange device that performs heat exchange by introducing a heat exchange medium into a heat exchanger is known. As a cooling mode of such a heat exchange device, there is an air cooling type in which an air flow such as air is applied to the heat exchanger to cool the heat exchange medium via the heat exchanger. In addition, the heat exchange efficiency is improved by using the heat (sensible heat) of water rather than depriving of heat by air, so that the heat exchanger in which the heat exchange medium is introduced is used as a cooling fluid as a cooling fluid. A water-cooling type in which cooling water is introduced into the heat exchanger and cooled by introducing cooling water into the heat exchanger has also been proposed.
As a system using such a heat exchange device, there is a heat pump used in an air conditioning system or a refrigeration system. In this case, the heat exchange medium is a refrigerant gas (two-phase refrigerant gas). Patent document 1 is mentioned as a water-cooling type air conditioning system and a heat exchange device.
JP 2006-162207 A

Cooling fluids (cooling water) used in water-cooled heat exchange devices include groundwater, rainwater, tap water, etc., but all use sensible heat of the cooling fluid to remove heat, requiring large amounts of water. As a result, the equipment becomes large and expensive. In addition, in an open type water cooling type such as a cooling tower, a path of water is an open space, which may cause harmful substances such as Legionella bacteria. In such a background, when considering environmental problems and energy saving problems, it is desired to realize more efficient heat exchange.
An object of the present invention is to provide a heat exchange device and a heat exchange system that are capable of efficient heat exchange and are compact and low in cost.

In order to achieve the above object, a heat exchange device according to the present invention includes a heat exchanger having a first flow path through which a heat exchange medium flows and a second flow path through which a cooling fluid flows, and one end at a second flow path. A mist generating means for generating and supplying spray of the cooling fluid into the introduction path or the second flow path connected to the path and open to the atmosphere at the other end, and a negative pressure on the discharge side of the second flow path. It is characterized by having a negative pressure generating means for applying.
In the heat exchange apparatus according to the present invention, the mist generating means includes an injection nozzle for injecting a cooling fluid, and a supply means for supplying the cooling fluid in the storage tank to the injection nozzle.
In the heat exchange device according to the present invention, the negative pressure generating means is a suction fan that generates a suction force in the exhaust passage connected to the discharge side of the second flow path by being driven to rotate. Yes.

The heat exchange apparatus according to the present invention is characterized by having cooling means for cooling the cooling fluid flowing in the exhaust passage and recovery means for returning the cooling fluid cooled and liquefied by the cooling means to the storage tank.
In the heat exchange device according to the present invention, the cooling means is provided in an exhaust passage located upstream of the suction fan in the cooling fluid conveyance direction.
In the heat exchanging apparatus according to the present invention, the cooling means is arranged on the upstream side of the intake passage from the open end so as to face the open end.

A heat exchange system according to the present invention includes a heat exchange device including a heat exchanger, and a refrigeration cycle unit that compresses / expands a heat exchange medium and introduces the heat exchange medium into the heat exchanger. It is the heat exchange apparatus in any one of 6, It is characterized by the above-mentioned.
A heat exchange system according to the present invention includes a heat exchange device including a heat exchanger, and a cooling device for introducing a heat exchange medium into the heat exchanger, and the heat exchange device is any one of claims 1 to 6. It is a heat exchange device.

According to the present invention, the heat exchanger having the first flow path through which the heat exchange medium flows and the second flow path through which the cooling fluid flows, and one end connected to the second flow path and the other end opened to the atmosphere. The mist generating means for generating and supplying the spray of the cooling fluid in the introduction path or the second flow path and the negative pressure generation means for applying a negative pressure to the discharge side of the second flow path are provided. Since air introduced into the second flow path and the spray-like (mist-like) cooling fluid are introduced into the second flow path, they are easily vaporized in the second flow path and are heated by the heat of vaporization. It takes heat away from the exchange medium. For this reason, heat exchange can be performed more efficiently than the conventional water-cooled type using only sensible heat, so the amount of cooling fluid used for heat exchange can be drastically reduced, and the size and cost of the equipment can be reduced. be able to.
When the cooling fluid is introduced into the second flow path in the form of a spray (mist), the discharge side of the second flow path is negative pressure, so that the spray (mist) is sucked into the second passage. Even if the spray (mist) evaporates and the internal pressure of the second flow path increases, the spray-like (mist-like) cooling fluid can be efficiently discharged from the second flow path, and the continuous efficient heat Can be exchanged.

According to the present invention, the mist generating means has the injection nozzle for injecting the cooling fluid and the supply means for supplying the cooling fluid in the storage tank to the injection nozzle, so that the mist generation means is introduced into the second flow path from the introduction path. Since the air and the spray-like (mist-like) cooling fluid injected from the injection nozzle are introduced into the second flow path, the air easily evaporates in the second flow path, and the amount of heat from the heat exchange medium by the heat of vaporization. Will be taken away. For this reason, heat exchange can be performed more efficiently than the conventional water-cooled type using only sensible heat, so the amount of cooling fluid used for heat exchange can be drastically reduced, and the size and cost of the equipment can be reduced. be able to.
According to the present invention, since the negative pressure generating means is a suction fan that generates a suction force in the exhaust path connected to the discharge side of the second flow path by being driven to rotate, it is versatile. Can be used to reduce costs.

According to the present invention, the cooling means for cooling the cooling fluid flowing in the exhaust passage and the recovery means for returning the cooling fluid cooled and liquefied by the cooling means to the storage tank are provided. The amount of replenishment can be reduced, and the cost for maintenance can be reduced.
According to the present invention, since the cooling means is provided in the exhaust passage located upstream of the suction fan in the cooling fluid conveyance direction, the suction fan sucks the air whose humidity is lowered by being cooled by the cooling means. In other words, failure and deterioration of the suction fan due to humidity can be reduced, and cost can be reduced.
According to the present invention, since the cooling means is disposed upstream of the open end of the introduction path and opposite the open end, the suction means can be used without using a drive source or a fan for the cooling means. Since the cooling device can be cooled by the air sucked into the open end of the introduction path when the fan is driven to rotate, the cost can be reduced and the power consumption can be reduced by simplifying the configuration. In addition, the air sucked from the open end of the introduction path takes heat from the cooling means and increases its temperature, so that the relative humidity of the intake air decreases, and the sprayed (mist) cooling in the second path The fluid becomes easier to vaporize, and the amount of heat can be taken from the heat exchange medium more efficiently.

  According to the present invention, heat exchange provided with the above heat exchange device and a refrigeration cycle unit that compresses / expands the heat exchange medium and introduces it into the heat exchanger, or a cooling device that introduces the heat exchange medium into the heat exchanger. Since it is a system, heat exchange can be performed more efficiently than conventional water-cooled systems, so the amount of cooling fluid used for heat exchange can be drastically reduced, and the equipment can be made smaller and less expensive. .

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a diagram illustrating a schematic configuration of the heat exchange device 100. The heat exchange device 100 includes a heat exchanger 5 having a first flow path 2 through which a heat exchange medium 1 flows and a second flow path 4 through which a cooling fluid 3 flows, and a spray (mist) 30 of the cooling fluid 3. Mist generating means 6 for generating and supplying the second flow path 4 through the introduction path 22 having one end 22A connected to the second flow path 4 and the other end opened to the atmosphere to be an open end 22B. And a suction fan 20 serving as a negative pressure generating means for applying a negative pressure to the discharge port 4B on the discharge side of the second flow path 4. On the open end 22 </ b> B side of the introduction path 22, an air filter 21 that removes dust and foreign matters in the introduced air is disposed.

  The heat exchanger 5 is a plate heat exchanger in which a plurality of plates made of metal such as copper or stainless steel are arranged in the same direction in the casing, and a space is formed between the plates. In this embodiment, as shown in FIG. 2, the space formed between the plates is the first flow path 2 and the second flow path 4. The first flow path 2 and the second flow path 4 are alternately arranged, and are formed so as to communicate from the introduction ports 2A and 4A to the discharge ports 2B and 4B, respectively. The type of the heat exchanger 5 is not limited to the plate type, and examples thereof include a shell and tube type (multi-tube type), a plate fin type, and the like. FIG. 2 schematically shows the inside of the heat exchanger 5.

  The mist generating means 6 includes an injection nozzle 61 that sprays the cooling fluid 3, a pressurizing pump 62 that pressurizes and supplies the cooling fluid 3 to the injection nozzle 61, and pipes 63A and 63B. The injection nozzle 61 is connected to the discharge side of the pressurization pump 62 through a pipe 63A having a pressure resistance. A tank 8 in which the cooling fluid 3 is stored is connected to the suction side of the pressurizing pump 62 through a pipe 63B having a pressure resistance. A filter means 64 for purifying the cooling fluid 3 is disposed in the pipe 63B between the pressure pump 62 and the tank 8, and is configured to supply the cooling medium 3 from which foreign matters have been removed to the pressure pump 62. ing. In this embodiment, the pressurizing pump 62 and the pipe materials 63A and 63B constitute supply means.

  The spray nozzle 61 sprays the pressurized cooling fluid 3 alone to generate the spray (mist) 30 or the spray fluid 61 and the cooling fluid 3 and the compressed air are sprayed simultaneously to generate the spray (mist) 30. A two-fluid nozzle can be used. When a two-fluid nozzle is used as the injection nozzle 61, a compressor that supplies air to the two-fluid nozzle and a transport pump that supplies the cooling fluid 3 may be provided. When a two-fluid nozzle is used, the compressor and the conveyance pump serve as a pressure supply unit. The particles of the mist 30 ejected from the ejection nozzle 61 are preferably those in the form of ultrafine mist-like water droplets of several microns to several tens of microns. Either may be used.

  The cooling fluid 3 may be water, and is preferably pure water with as few impurities as possible in consideration of clogging of the injection nozzle 61. For this reason, it is preferable to use a filter or a filter for purifying water as the filter means 64.

  The heat exchange medium 1 differs depending on the device connected to the heat exchange device 100. For example, the CFC type R-12, the HCFC type R-22, R-123, the HFC type R-134a, and R-404A. , R-407C, R410A, etc., natural refrigerants such as ammonia, carbon dioxide, hydrocarbons, water (warm water), air, steam, antifreeze and the like.

  The suction fan 20 is disposed on the other end 23B side of the exhaust passage 23 having one end 23A connected to the discharge port 4B of the second flow path 4 and the other end 23B open to the atmosphere. The suction fan 20 generates a suction force by being driven to rotate. In this embodiment, the suction fan 20 functions to make negative pressure on the discharge port 4B side through the exhaust passage 23.

  The operation of the heat exchange device 100 having such a configuration will be described. It is assumed that the heat exchange medium 1 has already been supplied to the first flow path 2 of the heat exchanger 5. When the suction fan 20 in the exhaust passage 23 is rotationally driven in this state, the discharge port 4B side of the second flow passage 4 is negatively pressurized, and air is sucked into the introduction passage 22 from the open end 22B through the air filter 21. The When the pressurizing pump 62 is operated, the cooling fluid 3 in the tank 8 is supplied to the injection nozzle 61, and the cooling fluid 3 is injected in the form of a mist by reaching the injection pressure of the nozzle. As shown in FIG. 2, the injected mist 30 is supplied to the second flow path 4 of the heat exchanger 5 while being mixed with air in the introduction path 22. When the plate is heated by the heat exchange medium 1, the supplied mist 30 is vaporized by increasing its temperature by removing the heat and cooling the plate by the heat of vaporization at that time. Take heat from 1 and cool down. For this reason, heat exchange can be performed more efficiently compared to the conventional water-cooled type that uses only sensible heat, so the amount of cooling fluid used for heat exchange can be drastically reduced, and the size and cost of equipment can be reduced. Can be achieved. The vaporized cooling fluid 3 is discharged into the atmosphere through the exhaust path 23 together with the air in the second flow path 4.

  Since the mist generating means 6 includes the injection nozzle 61 that sprays the cooling fluid 3 and the pressurizing pump 62 that pressurizes and supplies the cooling fluid to the injection nozzle 61, the mist-like cooling fluid 3 in the second flow path 4 is provided. Charging efficiency can be increased, heat can be taken from the heat exchange medium 1 with a larger amount of heat, and the heat exchange efficiency can be increased.

  As the form of the injected mist 30, a fine one is preferable in consideration of vaporization, but it is a matter of course that a particle having a particle size that adheres to the plate surface in the second flow path 4 and becomes water droplets is included. Absent. In this case, the mist 30 in the air and the sensible heat of the cooling fluid 3 that flows and adheres to the plate surface of the heat exchanger 5 without being vaporized can be deprived of heat from the heat exchange medium 1 through the plate and cooled. it can.

  In this embodiment, since the cooling medium 3 evaporates when passing through the heat exchanger 5, the cooling medium 3 is not repeatedly used as compared with the cooling tower method, and like Legionella in the heat exchanger 5. The risk of generating harmful substances is also reduced. More preferably, by forming a sealed space between the tank 8 and the second flow path 4 and using pure water as the cooling fluid 3, generation of harmful substances such as Legionella bacteria can be further suppressed.

  In this embodiment, the injection nozzle 61 is provided in the introduction passage 22, and the mist 30 injected from the injection nozzle 61 and the air sucked by the action of the suction fan 20 in the exhaust passage 23 are mixed before the second flow. Although the mixed supply method for supplying the liquid into the passage 4 is used, the supply method is not limited to such a form. For example, a direct injection supply method in which the injection nozzle 61 is attached to the heat exchanger 5, the mist 30 is directly supplied to the second flow path 4, and the air is mixed in the heat exchanger 5 may be used.

(Second Embodiment)
The heat exchanging apparatus 200 according to the second embodiment shown in FIG. 3 is cooled by the cooling means 40 and the cooling means 40 for cooling the air flowing in the exhaust passage 23 and the cooling fluid 3 in the configuration of the first embodiment. A recovery path 41 serving as a recovery means for returning the liquefied cooling fluid 3 to the tank 8 is added. For this reason, the same components as those in the first embodiment are denoted by the reference numerals used in the first embodiment, and detailed description thereof is omitted.

  The cooling means 40 has a radiator structure that introduces a mixture of the air and the cooling fluid 3 flowing in the exhaust passage 23 after heat exchange, and is upstream of the suction fan 20 in the cooling fluid conveyance direction. It is provided on the exhaust passage 23 located at the position. Further, the cooling means 40 is arranged on the upstream side of the intake end 22B of the introduction path 22 so as to face the open end 22B.

  According to the heat exchanging apparatus 200 having such a configuration, the air and the cooling fluid 3 that are heat-exchanged in the heat exchanger 5 and discharged into the exhaust passage 23 are introduced into the cooling means 40. The introduced cooling fluid 3 is cooled by the cooling means 40, so that at least a part thereof is liquefied. The liquefied cooling fluid 3 is recovered in the tank 8 through the recovery path 41. For this reason, the frequency | count of replenishment of the cooling fluid 3 to the tank 8, and the replenishment amount can be reduced, and the cost concerning a maintenance can be reduced.

  Since the cooling means 40 is provided in the exhaust passage 23 located upstream of the suction fan 20 in the cooling fluid conveyance direction, the suction fan 20 is cooled by the cooling means 40 and sucks air with reduced humidity. For this reason, failure and deterioration of the suction fan 20 due to humidity can be reduced, and cost can be reduced.

  Since the cooling means 40 is disposed on the upstream side of the intake end 22B of the introduction path 22 so as to be opposed to the open end 22B, it is possible to provide a cooling air drive source or a fan to be applied to the cooling means 40 separately. When the suction fan 20 is driven to rotate, the cooling means 40 can be cooled by the air sucked into the open end 22B of the introduction path 22. For this reason, it is possible to reduce the cost and power consumption by simplifying the configuration. Further, the air sucked from the open end 22B of the introduction path 22 takes heat from the cooling means 40 and increases its temperature. Therefore, the relative humidity of the intake air decreases, and the air is sprayed (misted) in the second path 4. ) Is more easily vaporized, and the amount of heat can be taken from the heat exchange medium 1 more efficiently.

(Third embodiment)
The present embodiment relates to a heat exchange system including the heat exchange device described in the first and second embodiments. As shown in FIG. 4, this heat exchange system includes a heat exchange device 200 and a refrigeration cycle unit 300 that compresses / expands the heat exchange medium 1 and introduces it into the heat exchanger 5 of the heat exchange device. The heat exchange device 100 may be used instead of the heat exchange device 200.

  The refrigeration cycle unit 300 is a so-called heat pump device, and has a well-known configuration in which a compressor 303 and an expansion valve 304 are arranged between an evaporator 301 and a condenser 302. A two-phase refrigerant is enclosed as the exchange medium 1. The heat exchanger 5 of each heat exchange device functions as the condenser 302 in this embodiment. When this system is an air conditioning system for cooling, the evaporator 301 is provided in a fan coil unit 305 installed indoors.

  According to such a heat exchange system, during cooling, the temperature of the heat exchange medium 1 (two-phase refrigerant) can be efficiently taken away by the condenser 302 (heat exchanger 5), and the heat exchange medium 1 (two-phase refrigerant) The condensation rate of the phase refrigerant) can be increased. As a result, the expansion rate of the heat exchange medium 1 (two-phase refrigerant) when passing through the expansion valve 304 is increased, and the evaporator 301 has a lower temperature than the conventional water-cooled type that uses only sensible heat. Since the medium 1 (two-phase refrigerant) is supplied, heat exchange can be performed efficiently, cooling efficiency can be improved, and power consumption can be suppressed.

(Fourth embodiment)
This form is related with the heat exchange system provided with the heat exchange apparatus demonstrated in the 1st form or the 2nd form. As shown in FIG. 5, the heat exchange system includes a heat exchange device 200 and a cooling device 400 that introduces the heat exchange medium 1 into the heat exchanger 5. Also in this embodiment, the heat exchange device 100 may be used instead of the heat exchange device 200. The cooling device 400 is a known water-cooled chiller that uses water (cooling water) as the heat exchange medium 1, and the heat exchange medium 1 (cooling) between the secondary side heat exchange medium 1 and the heat exchanger 5. Water) A circulation path 401 is provided.
Thus, according to the heat exchange system, the heat of the heat exchange medium 1 (cooling water) on the secondary side of the cooling device 400 can be efficiently exchanged with the heat exchanger 5, so that the cooling efficiency is improved. Power consumption can be suppressed.

  In the present embodiment, an air conditioning system using a heat pump as an example of the heat exchange system has been illustrated. However, the present invention is not limited to the air conditioning system. It can also be applied to a heat exchange system or the like used for cooling.

  It is a schematic block diagram of the heat exchange apparatus which is the 1st Embodiment of this invention.   It is a figure which shows the concept of the heat exchange by the structure of the 1st, 2nd flow path in a heat exchanger, and a mist-like cooling fluid.   It is a schematic block diagram of the heat exchange apparatus which is the 2nd Embodiment of this invention.   It is a schematic block diagram of the heat exchange system which is the 3rd Embodiment of this invention.   It is a schematic block diagram of the heat exchange system which is the 4th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat exchange medium 2 1st flow path 3 Cooling fluid 3A, 3B Spray 4 2nd flow path 5 Heat exchanger 6 Mist production | generation means 8 Storage tank 20 Negative pressure generation means (suction fan)
22 Introduction path 22A One end 22B of the introduction path Open end 23 of the introduction path Exhaust path 40 Cooling means 41 Recovery means 61 Injection nozzle 100, 200 Heat exchange apparatus 300 Refrigeration cycle section 400 Cooling apparatus

Claims (8)

A heat exchanger having a first flow path through which a heat exchange medium flows and a second flow path through which a cooling fluid flows;
Mist generating means for generating and supplying spray of the cooling fluid into the introduction channel or the second channel whose one end is connected to the second channel and the other end is opened to the atmosphere;
A heat exchange device having negative pressure generating means for applying a negative pressure to the discharge side of the second flow path.   The heat exchange apparatus according to claim 1, wherein the mist generating unit includes an injection nozzle that injects the cooling fluid, and a supply unit that supplies the cooling fluid in the storage tank to the injection nozzle.   The heat exchange device according to claim 1 or 2, wherein the negative pressure generating means is a suction fan that is driven to rotate and generates a suction force in an exhaust passage connected to a discharge side of the second flow passage. Cooling means for cooling the cooling fluid flowing in the exhaust passage;
The heat exchange apparatus according to claim 3, further comprising a recovery unit that returns the cooling fluid cooled and liquefied by the cooling unit to the storage tank.   The heat exchanger according to claim 4, wherein the cooling means is provided in an exhaust path located upstream of the suction fan in the cooling fluid conveyance direction.   The heat exchange device according to claim 4 or 5, wherein the cooling means is disposed on the upstream side of the intake passage of the introduction path and opposed to the open end.   A heat exchange device comprising a heat exchanger, and a refrigeration cycle section for compressing / expanding a heat exchange medium and introducing the heat exchange medium into the heat exchanger, wherein the heat exchange device is according to any one of claims 1 to 6. A heat exchange system that is a heat exchange device.   A heat exchange device comprising a heat exchanger and a cooling device for introducing a heat exchange medium into the heat exchanger, wherein the heat exchange device is a heat exchange device according to any one of claims 1 to 6. Exchange system.

Images