JPWO2017073367A1 - Evaporative condenser and refrigeration system equipped with the evaporative condenser - Google Patents

Abstract

To provide an evaporative condenser that efficiently condenses and liquefies a gaseous refrigerant that is sequentially sent through a cooling cycle for condensation, and a refrigeration system including the evaporative condenser.
An inclined plate-shaped coolant cooling section (120) that cools and condenses the refrigerant R, an inclined plate-shaped water spray section (130) that sprays cooling water CW to cool the coolant cooling section (120), and sucks air A casing (110) having an air inlet (112) for discharging air and an air outlet (114) for discharging air, and the air inlet (112) to the air outlet (114) within the casing (110). A plurality of condensing coils (126) that are provided with a ventilation fan (140) that generates an air flow, and in which the refrigerant cooling section (120) cools while flowing and flowing down the refrigerant R by being inclined at least with respect to the horizontal direction. The evaporation type has a plurality of watering nozzles (134) having a plurality of watering nozzles (134) that are arranged to be inclined along the condensing coil (126) and spray the cooling water CW toward the condensing coil (126). Condenser (10 ) And refrigeration systems with the same S.

Description

  The present invention relates to an evaporative condenser used in a refrigeration system, and more particularly, heat of a primary side refrigerant circulating in a primary refrigeration cycle used in a refrigeration system for cooling a freezer or the like and combined with the configuration of the refrigeration system. The present invention relates to an evaporative condenser for condensing and liquefying a refrigerant in a condensing cooling cycle that has been evaporated by removing the vapor and a refrigeration system including the evaporative condenser.

Conventionally, as an evaporative condenser used in a refrigeration facility using ammonia as a refrigerant, heat transfer having a plurality of refrigerant pipes composed of straight pipes for cooling and condensing ammonia refrigerant sequentially sent from a compressor of the refrigeration facility A water spray nozzle that sprays cooling water on the heat transfer body to cool the heat transfer body, an air suction port that sucks in air that evaporates the water sprayed from the water spray nozzle, and an air outlet that discharges the air There is known an evaporative condenser having a casing having an air blower and a blower that is installed on the air outlet side of the casing and forcibly discharges air from the air outlet (see, for example, Patent Document 1). ).
In addition, as an evaporative condenser used in refrigeration equipment using carbon dioxide as a refrigerant, a coil that cools and condenses the carbon dioxide refrigerant sequentially sent from the evaporator of the refrigeration equipment, and water is sprayed into the coil. A casing having a nozzle for cooling the coil, an air suction port for sucking air for evaporating the cooling water sprayed from the nozzle, and an air discharge port for discharging the air; An evaporative condenser having a fan that forcibly sucks air from a suction port and discharges the air from the air discharge port side is known (for example, see Patent Document 2).

Japanese Patent Laid-Open No. 2001-091102 (in particular, refer to the claims and FIGS. 1 and 3) Japanese Patent Laying-Open No. 2003-240360 (see in particular paragraph 0011 and FIG. 1)

However, the evaporative condenser described in Patent Document 1 described above has a structure in which the gaseous ammonia refrigerant is cooled in the refrigerant pipe arranged in the horizontal direction, and is thus condensed and liquefied in the horizontally arranged refrigerant pipe. The stagnation of the ammonia refrigerant staying in the refrigerant pipe occurs, and the liquid ammonia refrigerant staying and adhering to the refrigerant pipe prevents heat from being removed from the remaining gaseous ammonia refrigerant. The gaseous ammonia refrigerant that is sent cannot be efficiently cooled and condensed into a liquid ammonia refrigerant.
As a result, the refrigerant filling amount increases, the diameter of the refrigerant pipe for circulating the refrigerant increases, the capacity of the blower increases due to the increase in the air quantity for cooling the refrigerant pipe, the accompanying noise increases, and the air quantity increases. There was a problem that the consumption of the cooling water was increased, the size of the evaporative condenser was increased, and the installation area was increased.
Further, when cooling water is recovered and reused, there has been a problem that the refrigerant pipe is contaminated or corroded due to the concentration of impurities in the original water or the inclusion of dust or toxic gas in the air.

  Similarly, the evaporative condenser described in Patent Document 2 described above has a structure in which the gaseous carbon dioxide refrigerant is cooled in the straight pipe region of the coil arranged in the horizontal direction. The carbon dioxide refrigerant condensed and liquefied in the straight pipe region stays and stays in the straight pipe region, and the liquid carbon dioxide refrigerant that stays and adheres in the straight pipe region becomes the remaining gaseous carbon dioxide. As a result, there is room for improvement in the structure in which the gaseous carbon dioxide refrigerant sequentially sent from the evaporator is cooled to condense and liquefy it into a liquid ammonia refrigerant.

  Therefore, the present invention solves the problems of the prior art as described above. That is, the first object of the present invention is to fill the refrigerant due to the stagnation of the liquefied refrigerant in the condensation coil. The second purpose is to reduce the installation area of the evaporative condenser, and the third purpose is to reduce the fan power of the ventilation fan and reduce the noise. The fourth purpose is to suppress the consumption of the cooling water, and the fifth purpose is to keep the cooling water in a quality suitable for use. The evaporative condenser suitable for these purposes and this It is to provide a refrigeration system with an evaporative condenser.

  The invention according to claim 1 is an inclined plate-like refrigerant cooling section that circulates through the cooling cycle for condensation and cools and condenses the refrigerant that is sequentially sent, and sprays cooling water into the refrigerant cooling section. A casing having an inclined plate-shaped watering part for cooling the refrigerant cooling part, an air suction port for sucking air for evaporating the cooling water sprayed from the watering part, and an air discharge port for discharging the air; An evaporative condenser having a ventilation fan that generates an air flow from an air inlet to an air outlet inside, wherein the refrigerant cooling portion is arranged to be inclined with respect to a horizontal direction and circulates the refrigerant. By having a plurality of condensing coils that cool while flowing down, and the water sprinkling part has a plurality of water sprinkling nozzles that incline along the condensing coil and sprinkle the cooling water toward the condensing coils. , Solve the problem mentioned above Than is.

  In addition to the configuration of the evaporative condenser described in claim 1, the invention according to claim 2 has the above-described problem due to the fact that the water sprinkling unit is inclined on the windward side of the refrigerant cooling unit. It will solve further.

  In the invention according to claim 3, in addition to the configuration of the evaporative condenser described in claim 1 or 2, an eliminator provided between the refrigerant cooling unit and the water spray unit and the ventilation fan includes: The above-described problems are further solved by being inclined along the refrigerant cooling section and the water sprinkling section.

  According to a fourth aspect of the present invention, in addition to the configuration of the evaporative condenser according to any one of the first to third aspects, the air suction port is a pair of opposing casings of the casing. Provided on the side wall surface, the air discharge port is provided on the top surface of the casing, and the condensing coil is inclined from the upper side of the casing side wall surface toward the casing bottom wall surface facing the air discharge port. Therefore, the above-described problems are further solved.

  In addition to the configuration of the evaporative condenser according to any one of claims 1 to 4, the invention according to claim 5 is a cooling water purification unit in which the watering unit purifies the cooling water. By connecting to the above, the above-described problems are further solved.

  The invention according to claim 6 is a refrigeration system having the evaporative condenser according to any one of claims 1 to 5, thereby further solving the above-described problem. .

  The evaporative condenser of the present invention includes an inclined plate-like refrigerant cooling section that circulates through a cooling cycle for condensation and cools and condenses the refrigerant that is sequentially sent, and water is sprayed into the refrigerant cooling section to cool the refrigerant. A casing having a watering part for cooling the cooling part, an air suction port for sucking air for evaporating the cooling water sprayed from the watering part, and an air discharge port for discharging air, and an air suction port inside the casing It is equipped with a ventilation fan that generates an air flow from the air outlet to the air outlet, thereby cooling the gaseous refrigerant that is sent sequentially through the cooling cycle for condensation and condensing it into a liquid refrigerant Not only can it be sent out sequentially to the circulation of the cooling cycle, but also the following specific effects can be obtained.

According to the evaporative condenser of the invention of claim 1, the refrigerant cooling section has a plurality of condensing coils that are inclined with respect to the horizontal direction and cool while flowing and flowing down the refrigerant. As a result, the gaseous refrigerant is cooled by taking heat from the inner peripheral wall surface of the condensing coil while moving in the tube of the condensing coil, and by condensing and liquefying the condensation latent heat by cooling. When a liquid film or droplet is generated and attached to the liquid, the attached liquid refrigerant flows down in the tube of the condensing coil due to its own weight, and the stagnation of the refrigerant does not occur, and the remaining gaseous state Since the refrigerant is also condensed and liquefied, the gaseous refrigerant sequentially circulated through the condensation cooling cycle is efficiently liquefied and the amount of refrigerant charged can be reduced.
Furthermore, compared to the case where the plate-like refrigerant cooling section is arranged in the horizontal direction as used in a conventional evaporative condenser, the inclined plate-like refrigerant cooling section is inclined to evaporate the cooling water. The length of the condensing coil that contributes to the length increases, so that a refrigerant cooling section having the same surface area as that of a conventional evaporative condenser can be obtained by downsizing the evaporative condenser and reducing the installation area.
In addition, when the installation area is the same as that of a conventional evaporative condenser, the thickness of the condensing coil is reduced in order to obtain a refrigerant cooling part having the same surface area. To obtain the same amount of ventilation required for cooling, the pressure loss of the ventilation when passing through the condensing coil is reduced and the fan power of the ventilation fan is reduced, and generated by the ventilation passing through the condensing coil. Noise can be reduced.
In addition, since the water sprinkling section has a plurality of water spray nozzles that are inclined along the condensing coil and spray the cooling water toward the condensing coil, the distance between the water spray nozzle and the condensing coil becomes constant. Because the sprayed water adheres evenly to the outer peripheral wall surface of the condensing coil and flows down to the downstream side, the cooling water consumed by using more latent heat of evaporation from the water sprayed from the water spray section. The amount can be suppressed.

According to the evaporative condenser of the invention according to claim 2, in addition to the effect of the invention according to claim 1, the water sprinkling part is sprinkled by being inclined on the windward side of the refrigerant cooling part. A lot of cooling water adheres to the lower side of the condensing coil and promotes the formation of liquid films and droplets on the lower surface of the inner peripheral wall surface of the condensing coil. Can be shortened.
In addition, since the pressure loss of the ventilation is reduced by watering in the forward direction along the ventilation direction of the ventilation fan, the fan of the ventilation fan is compared with the case of watering in the opposite direction against the ventilation as in the conventional watering section. Power can be reduced.

According to the evaporative condenser of the invention of claim 3, in addition to the effect of the invention of claim 1 or claim 2, an eliminator provided between the refrigerant cooling unit and the watering unit and the ventilation fan is provided. As a result of being inclined along the refrigerant cooling part and the water sprinkling part, water is sprinkled from the water sprinkling part that does not contribute to cooling of the refrigerant cooling part as compared with the case where an eliminator is provided at the air outlet of the casing as in the prior art. The cooling water consumption can be reduced because the collection of the cooling water and the recovery by flowing down in the lower direction of the eliminator by the dead weight of the collected cooling water are performed at an early stage.
In addition, since the surface area of the eliminator that contributes to the collection of cooling water is enlarged, to obtain an eliminator with the same surface area as a conventional evaporative condenser, the evaporative condenser must be downsized to reduce the installation area. Can do.
In addition, when the installation area is the same as that of a conventional evaporation condenser, the thickness of the eliminator is reduced when the eliminator has the same surface area. To obtain the same amount of ventilation required, the pressure loss of ventilation when passing through the eliminator at low ventilation speed is reduced, the fan power of the ventilation fan is reduced, and the noise generated by the ventilation passing through the eliminator is reduced. be able to.

  According to the evaporative condenser of the invention of claim 4, in addition to the effect of the invention of any one of claims 1 to 3, the air suction port is a pair of casings facing each other. By being provided on the side wall surface, the air discharge port is provided on the top surface of the casing, and the condensation coil is inclined from the upper side of the casing side wall surface toward the casing bottom wall surface side facing the air discharge port, In order to obtain the surface area of the refrigerant cooling part in the conventional evaporative condenser, for example, when the refrigerant cooling part is arranged so as to be two sides of a so-called inverted equilateral triangle inclined downward by 60 ° with respect to the horizontal direction, As it is, the refrigerant cooling part has a doubled surface area. By halving the thickness of the refrigerant cooling part and making the surface area the same, the pressure loss of the air passing through the condensing coil is reduced, and the ventilation fan fan It is possible to realize a reduction of reduction and noise accompanying the emission power.

  According to the evaporative condenser of the invention according to claim 5, in addition to the effect produced by the invention according to any one of claims 1 to 4, the water spraying part purifies the cooling water. By connecting to the cooling water, it removes the concentrated impurities contained in the cooling water collected and recovered by the eliminator and impurities such as dust and toxic gas mixed from the air, and supplies them to the sprinkler. The quality of water can be improved to prevent performance degradation due to dirt and corrosion of the condensing coil, and the frequency of maintenance can be reduced.

  According to the refrigeration system of the invention of claim 6, by combining the cooling cycle for condensation having the evaporative condenser according to any one of claims 1 to 5 in the configuration. In the refrigeration system, it is possible to obtain the same effect as that produced by the invention according to any one of claims 1 to 5.

The conceptual diagram which shows the refrigerating system using the evaporative condenser of this invention. BRIEF DESCRIPTION OF THE DRAWINGS Schematic which looked at the evaporative condenser which is 1st Example of this invention from the front diagonally forward. Sectional drawing seen by the code | symbol 3-3 of FIG. The Example of the refrigerant | coolant cooling part in the evaporative condenser of this invention. The modification of the refrigerant | coolant cooling part in the evaporative condenser of this invention. The schematic which looked at the evaporative condenser which is 2nd Example of this invention from the front diagonally forward. Sectional drawing seen by the code | symbol 6-6 of FIG. The conceptual diagram which connected the cooling water purification | cleaning part to the evaporative condenser which is 2nd Example of this invention. Schematic which looked at the evaporative condenser which is 3rd Example of this invention from the front diagonally forward. Sectional drawing seen by the code | symbol 9-9 of FIG. Sectional drawing seen by the code | symbol 10-10 of FIG. Schematic which looked at the evaporative condenser which is 4th Example of this invention from the front diagonally forward. Sectional drawing seen by the code | symbol 12-12 of FIG.

The present invention circulates a cooling cycle for condensation and cools and condenses the refrigerant that is sequentially sent and cools the refrigerant cooling unit by sprinkling cooling water into the refrigerant cooling unit. A casing having a watering portion, an air suction port for sucking air for evaporating cooling water sprayed from the watering portion, and an air discharge port for discharging air, and from the air suction port to the air discharge port in the casing An evaporative condenser having a ventilation fan that generates a flow of air, wherein the refrigerant cooling section has a plurality of condensing coils that are inclined with respect to the horizontal direction to cool the refrigerant while flowing and flowing down. The water spraying section has a plurality of water spray nozzles that are inclined along the condensing coil and sprinkle the cooling water toward the condensing coil, so that the gas that is sequentially sent through the condensing cooling cycle The efficiency of the refrigerant As long as it condensed and liquefied, specific embodiments thereof are may be any one.
For example, carbon dioxide, ammonia, non-fluorocarbon refrigerants (such as propane, butane, and isobutane), and fluorocarbon refrigerants (such as 134a) can be used as the refrigerant used in the condensation cooling cycle. Any material may be used as long as it is condensed and liquefied in the tube of the condensing coil.
Furthermore, the position of the water sprinkling part that cools the refrigerant cooling part may be, for example, any of the upper side, the lower side, the side, the windward side, and the leeward side of the refrigerant cooling part, and sprays / sprinkles cooling water on the refrigerant cooling part. As long as it is, the specific embodiment may be anything.
Further, the position of the ventilation fan may be, for example, either on the air inlet side on the windward side or on the air outlet side on the leeward side, and may generate an air flow from the air inlet port to the air outlet port inside the casing. For example, any specific embodiment may be used.

The evaporative condenser 100 used in the refrigeration system S according to the first embodiment of the present invention will be described below with reference to FIGS. 1 to 4B.
Here, FIG. 1 is a conceptual diagram showing a refrigeration system S using the evaporative condenser 100 of the present invention, and FIG. 2 is a front oblique view of the evaporative condenser 100 of the first embodiment of the present invention. 3 is a cross-sectional view taken along the line 3-3 in FIG. 2, and FIG. 4A is an embodiment of the refrigerant cooling unit 120 in the evaporative condenser 100 of the present invention. FIG. 4B is a modification of the refrigerant cooling unit 120 in the evaporative condenser 100 of the present invention.

As shown in FIG. 1, the refrigeration system S circulates a primary ammonia refrigeration cycle Sa that circulates ammonia and uses it as a refrigerant, and carbon dioxide that is cooled by the ammonia refrigerant of the primary ammonia refrigeration cycle Sa. A secondary carbon dioxide cooling cycle Sb used as a refrigerant, and an ammonia condensing cooling cycle Sc in which a refrigerant R is circulated as an example of carbon dioxide refrigerant for cooling the ammonia refrigerant in the primary ammonia refrigeration cycle Sa; It is configured by combining.
The primary side ammonia refrigerating cycle Sa has an ammonia condensation side cascade capacitor Sa1 and an ammonia evaporation side cascade capacitor Sa2.
The secondary carbon dioxide cooling cycle Sb has an evaporator Sb1.
The ammonia condensing cooling cycle Sc has an evaporative condenser 100.
The evaporative condenser 100 can be handled by increasing or decreasing the quantity according to the scale of the refrigeration system S.

In the ammonia condensation side cascade condenser Sa1, the ammonia refrigerant in the primary ammonia refrigeration cycle Sa is deprived of heat by the liquid refrigerant Rl (R) sent from the evaporative condenser 100 of the ammonia condensation cooling cycle Sc. Cooled, condensed and liquefied.
The liquid refrigerant Rl (R) deprived of heat from the ammonia refrigerant is evaporated and vaporized by the deprived heat.
The evaporated / vaporized refrigerant Rg (R) is returned to the evaporative condenser 100, cooled again, and condensed / liquefied.

  In this way, the liquid refrigerant Rl (R) that has been sufficiently cooled and condensed and liquefied in the evaporative condenser 100 takes heat from the ammonia refrigerant, evaporates and vaporizes, and the ammonia refrigerant is cooled. Since the condensation and liquefaction temperature of the ammonia refrigerant is lower than when cooling with conventional cooling water, the cooling efficiency is improved while reducing the size and cooling efficiency compared to the conventional ammonia condensing cooling cycle Sc equipped with a cooling tower and cooling water pump. I'm doing better.

  In addition, although an evaporative condenser is abbreviated to “Evaporative Condenser” and is sometimes referred to as “Evacon”, in this specification, the name of an evaporative condenser is used.

  As shown in FIGS. 2 and 3, the evaporative condenser 100 is an inclined plate-shaped refrigerant cooling system that cools and condenses the refrigerant R that is sequentially sent through the casing 110 and the cooling cycle Sc for ammonia condensation. Section 120, an inclined plate-shaped water spray section 130 that cools the coolant cooling section 120 by spraying cooling water CW to the coolant cooling section 120, a ventilation fan 140, an eliminator 150, a water spray pump 160, and a water pipe 170. And.

The casing 110 includes an air inlet 112, an air outlet 114, and a water collection tank 116.
The air inlet 112 is an opening for sucking air from the outside of the casing 110, and is provided on the casing side wall surface of the casing 110.
The air discharge port 114 is an opening for discharging air from the inside of the casing 110, and is provided on the top surface of the casing 110.
The water collection tank 116 is a bottomed space for storing the cooling water CW in the casing 110, and is provided on the casing bottom wall surface side of the casing 110.

Inside the casing 110, a coolant cooling unit 120, a water spray unit 130, and a ventilation fan 140 are installed.
The refrigerant cooling unit 120 includes an upstream side refrigerant gas supply header 122, a downstream side refrigerant liquid discharge header 124, and a plurality of condensing coils 126.
The refrigerant cooling unit 120 is provided on the flow path until the air sucked from the air suction port 112 is discharged from the air discharge port 114.
For example, the refrigerant cooling unit 120 is installed at a position higher than the air suction port 112.

The upstream-side refrigerant gas supply header 122 is provided on the upstream side of the refrigerant cooling unit 120 into which the refrigerant R sent from the ammonia condensation-side cascade condenser Sa1 of the primary-side ammonia refrigeration cycle Sa flows, and is provided on the casing side wall surface of the casing 110. It is a straight pipe that is installed at a high position and supplies refrigerant gas.
The downstream side refrigerant liquid discharge header 124 is provided on the downstream side for sending the refrigerant R flowing out from the refrigerant cooling unit 120 to the ammonia condensation side cascade capacitor Sa1, and is provided on the casing side wall surface of the casing 110 facing the upstream side refrigerant gas supply header 122. It is a straight pipe that is installed at a low position and discharges the refrigerant liquid.

The pipe diameter of the upstream refrigerant gas supply header 122 (inner diameter of the pipe) and the pipe diameter of the downstream refrigerant liquid discharge header 124 are substantially the same dimensions.
The arrangement of the upstream side refrigerant gas supply header 122 and the downstream side refrigerant liquid discharge header 124 may be inside or outside the casing 110.

The condensing coil 126 is composed of a straight pipe.
Each of the plurality of straight pipes constituting the plurality of condensing coils 126 communicates one upstream side with the upstream refrigerant gas supply header 122 and the other downstream side with the downstream refrigerant liquid discharge header 124.
The plurality of condensing coils 126 are respectively connected and provided between the upstream side refrigerant gas supply header 122 and the downstream side refrigerant liquid discharge header 124 in a state of being spaced apart and parallel to each other, and are inclined with respect to the horizontal direction. .
The refrigerant cooling unit 120 has an inclined plate-like structure.

As a result, the condenser coil 126, which is inclined at least partially with respect to the horizontal direction, is more cooled than the condenser coil arranged in the horizontal direction such as the refrigerant cooling unit used in the conventional evaporative condenser. The length of the pipe that contributes to the evaporation of the water CW is increased, and the region contributing to the evaporation of the cooling water CW, that is, the surface area of the outer peripheral wall surface, and the region contributing to the cooling of the refrigerant R, that is, the surface area of the inner peripheral wall surface. More is secured.
The heat transfer between the cooling water CW sprayed from the sprinkler 130 on the outer peripheral wall surface of the condensing coil 126 and the refrigerant R approaching the inner peripheral wall surface of the condensing coil 126 is improved, and the liquefaction efficiency of the refrigerant R is high. Become.

The tube diameter of the condensing coil 126 is smaller than the tube diameters of the upstream refrigerant gas supply header 122 and the downstream refrigerant liquid discharge header 124.
Thereby, air can easily flow through the gap between the condensing coils 126, and evaporation of the cooling water CW attached to the outer peripheral wall surface of the condensing coil 126 can be promoted.

The water sprinkling unit 130 is provided on the lower side corresponding to the windward side of the refrigerant cooling unit 120.
The water sprinkling unit 130 includes a cooling water supply header 132 and a plurality of water spray nozzles 134.
The cooling water supply header 132 is a straight pipe that is installed on the upstream side of the water sprinkling unit 130 to which the cooling water CW is sent from the water spray pump 160 and supplies the cooling water to the water spray nozzle 134.
The cooling water supply header 132 may be installed at any position below the upstream side refrigerant gas supply header 122 or below the downstream side refrigerant liquid discharge header 124.

The watering nozzle 134 is composed of a straight pipe, is provided below the condensing coil 126 so as to be forward in the ventilation, and is inclined along the condensing coil 126.
The plurality of water spray nozzles 134 are provided to be connected to the cooling water supply header 132 in a state of being separated from each other, and are arranged in parallel so as to be parallel to each other.
The water sprinkling unit 130 has an inclined plate-like structure in the shape of a so-called comb blade.
That is, the inclined plate-shaped refrigerant cooling section 120 and the inclined plate-shaped water sprinkling section 130 are inclined with respect to the horizontal direction, and the sprinkling section 130 is parallel to the lower side corresponding to the windward side of the refrigerant cooling section 120 at a constant distance. Are in parallel.

Thereby, the distance between the watering nozzle 134 of the watering part 130 and the condensing coil 126 of the refrigerant | coolant cooling part 120 becomes fixed, and the cooling water CW sprinkled from the watering nozzle 134 has no spots toward the lower side of the condensing coil 126. It uniformly adheres to the outer surface of the condensing coil 126, that is, the lower part of the outer peripheral wall surface, and flows downstream.
Further, a large amount of the sprayed cooling water CW adheres to the lower side of the condensing coil 126, and a liquid film, a droplet, or the like is formed on the lower surface of the inner peripheral wall surface of the condensing coil 126, that is, a lower portion of the inner peripheral wall surface. Generation is promoted.

Each of the straight pipes constituting the watering nozzle 134 has a plurality of jet outlets.
The spout is a water spout for spraying the cooling water CW in the form of a mist, and is provided toward the condensing coil 126.
The pipe diameter of the water spray nozzle 134 is smaller than the pipe diameter of the cooling water supply header 132.
As a result, air easily flows through the gap between the watering nozzles 134, and air that has passed through the gap between the condensation coils 126 is easily discharged from the air discharge port 114.

The ventilation fan 140 is provided at the air outlet 114.
The eliminator 150 is provided between the refrigerant cooling unit 120 and the ventilation fan 140 and is inclined along the refrigerant cooling unit 120 and the water sprinkling unit 130.

The eliminator 150 has a plurality of elements 152.
The individual elements 152 are installed in the vertical direction along the condensing coil 126.
Thereby, compared with the case where the eliminator 150 is provided in the air discharge port 114 of the casing 110 as in the prior art, the mist-like cooling water CW sprinkled from the sprinkler 130 that does not contribute to the cooling of the refrigerant cooler 120 is the eliminator. It is collected early at 150 individual elements 152.
The collected water droplets of the cooling water CW are aggregated while flowing down toward the lower part of the eliminator 150 by their own weight through the individual elements 152, discharged from the casing bottom wall surface side of the eliminator 150, and provided on the casing bottom wall surface side of the casing 110. It flows down directly to the collected water collection tank 116 and is collected.
And the quantity of the cooling water CW discharged | emitted on the outer side of the evaporative condenser 100 accompanying the airflow from the air inlet 112 to the air outlet 114 generated inside the casing 110 by the ventilation fan 140 is suppressed, and cooling is performed. The consumption of water CW is reduced.

  The watering pump 160 and the water supply pipe 170 are provided between the water collection tank 116 and the cooling water supply header 132 in order to circulate the cooling water CW in the casing.

With reference to FIGS. 2 and 3, the vaporized refrigerant Rg (R) supplied by the evaporative condenser 100 of the present invention is deprived of heat and condensed and liquefied to form a liquid refrigerant Rl (R). The operation to be discharged will be described.
The ventilation fan 140 is activated and rotates.
By the rotation of the ventilation fan 140, air is sucked into the casing 110 from the air suction port 112 and passed through the refrigerant cooling unit 120, and then forcibly discharged from the air discharge port 114.

The cooling water CW is sent from the water collection tank 116 through the water supply pipe 170 to the cooling water supply header 132 by the watering pump 160.
The cooling water CW sent to the cooling water supply header 132 is diverted to the plurality of water spray nozzles 134 in the cooling water supply header 132, and is sprayed from the outlet of the water spray nozzle 134 in the forward direction along the ventilation direction of the ventilation fan 140. And watered.
Since the ventilation direction and the watering direction are the same direction, the fan power of the ventilation fan 140 is reduced as compared with the conventional case where watering is performed in the opposite direction against the ventilation direction.
In addition, the spray outlet of the watering nozzle 134 employs a mist-like structure composed of finer water droplets than in the case where water is sprayed in the opposite direction, and is cooled by evaporating from the surface of the water droplets between the jet outlet and the condensation coil 126. The effect is secured.

The sprayed cooling water CW comes into contact with the outer peripheral wall surface of the condensation coil 126.
The cooling water CW that has contacted is evaporated (vaporized) by the ventilated air, and the latent heat of evaporation is taken away from the outer peripheral wall surface of the condensing coil 126.
The cooling water CW that has not evaporated is recovered by the eliminator 150 or dropped as water droplets to be returned to the water collecting tank 116 and reused.

The gaseous refrigerant Rg sent to the refrigerant cooling unit 120 flows into the upstream refrigerant gas supply header 122.
The gaseous refrigerant Rg flowing into the upstream refrigerant gas supply header 122 is diverted to the plurality of condensing coils 126 in the upstream refrigerant gas supply header 122.
The diverted gaseous refrigerant Rg flows into the pipe of the condensing coil 126 and flows down in one direction toward the downstream refrigerant liquid discharge header 124.

The condensation coil 126 deprived of latent heat of vaporization takes heat from the gaseous refrigerant Rg which is close to the surface of the inner peripheral wall surface of the condensation coil 126 among the gaseous refrigerant Rg flowing down.
The gaseous refrigerant Rg deprived of heat is condensed and liquefied to become a liquid refrigerant Rl, which adheres to the inner peripheral wall surface of the condensing coil 126 and generates a liquid film, liquid droplets and the like.

Here, the condensation coil 126 is inclined with respect to the horizontal direction.
As a result, the gaseous refrigerant Rg is cooled while being deprived of heat from the inner peripheral wall surface of the condensing coil 126 while moving in the tube of the condensing coil 126, and condensed and liquefied by depriving the latent heat of condensation due to cooling. When a liquid film, droplets, or the like is generated and adhered to the inner peripheral wall surface of 126, the accumulated liquid refrigerant Rl flows down and does not stay in the tube of the condensation coil 126 due to its own weight.

As the liquid refrigerant Rl flows down, the liquid film or droplets of the liquid refrigerant Rl staying on the inner peripheral wall surface of the condensing coil 126 (sleeping) are always in a small state.
Condensation and liquefaction of the remaining gaseous refrigerant Rg are also promoted by the liquid refrigerant Rl staying and adhering being always in a small state.
Thus, the condensing coil 126 functions to prevent the refrigerant from staying.
Since the amount of staying (stagnation) of the refrigerant R is reduced by the stay prevention function, the refrigerant filling amount in the pipe is suppressed to the necessary minimum, and the refrigerant filling amount is reduced as compared with the conventional evaporative condenser. .

Further, a straight pipe portion constituting at least a part of the condensing coil 126 is installed in a water spray region of the cooling water CW from the water spray unit 130.
Thereby, compared with the condensation coil 126 which has a curved pipe part in the watering area | region of the cooling water CW from the watering part 130, the condensation coil 126 which has installed the straight pipe part which comprises at least one part in this area | region. On the other hand, when the gaseous refrigerant Rg is condensed and liquefied and stays and adheres to the inner peripheral wall surface of the condensing coil 126, the staying and attached liquid refrigerant Rl forms the shortest distance with a uniform inclination angle in one direction. It flows down the pipe of the straight pipe portion inclined to the higher speed and decreases.
Then, the gaseous refrigerant Rg approaches the inner peripheral wall surface of the condensing coil 126, and the gaseous refrigerant Rg is efficiently cooled and condensed and liquefied into the liquid refrigerant Rl.

The liquid refrigerant Rl flowing down from each of the plurality of condensing coils 126 joins at the downstream refrigerant liquid discharge header 124.
The merged liquid refrigerant Rl is sent out from the downstream refrigerant liquid discharge header 124.
In this way, the refrigerant R is cooled while flowing down in the tube of the condensation coil 126.

Further, the refrigerant cooling unit 120 arranged in an inclined manner has a larger inlet area through which air is ventilated than in the case where the refrigerant cooling unit 120 is arranged horizontally as in the prior art.
For example, the width W, which is the depth length, is constant, the length of the plate-like refrigerant cooling unit horizontally arranged as in the conventional case is L, and the inclined plate-like refrigerant cooling unit 120 of the present invention is longer than the conventional one. In the case of an inclined arrangement in which the liquid refrigerant Rl is discharged from the vertically lower side by 0.7 L, the length of the refrigerant cooling unit 120 of the present invention is derived as about 1.2 L by the three square theorem, and the length and width The inlet area calculated by the product of is about 1.2 LW, that is, about 1.2 times.
Here, since the air volume is calculated by the product of the inlet area and the wind speed, in order to pass the same air volume as the conventional condenser through the refrigerant cooling section 120, the refrigerant cooling section 120 is thinned or ventilated. Slow down the speed.
Further, when the condensing coil of the conventional evaporative condenser is tilted as it is, the size of the evaporative condenser is reduced, and the installation area is reduced accordingly.

The air resistance of the refrigerant cooling unit 120 is roughly proportional to the square of the speed and the thickness of the refrigerant cooling unit 120.
As a result, the air resistance of the refrigerant cooling unit 120 is reduced and the fan power of the ventilation fan 140 is reduced even when the thickness of the refrigerant cooling unit 120 is reduced or the speed of ventilation is reduced. Power consumption is reduced, and noise associated with ventilation of the refrigerant cooling unit 120 is reduced.

Since the water sprinkling unit 130 and the eliminator 150 are also inclined as in the refrigerant cooling unit 120, the inlet area through which the air is ventilated is larger than in the case of horizontal arrangement as in the prior art.
Then, similarly to the refrigerant cooling unit 120, in order to obtain the same performance, it is possible to reduce the thickness that allows air to pass through, so the fan power of the ventilation fan 140 that ventilates the water sprinkling unit 130 and the eliminator 150 is reduced. Noise associated with ventilation passing through the condensing coil 126 is reduced.
The evaporative condenser 100 can be made smaller than the conventional one when the same performance as the conventional one is used.

As shown in FIG. 4A, the refrigerant cooling unit 120 has been described with respect to a single-stage structure in which the condensing coils 126 are arranged side by side in a horizontal row, but a structure in which two or more stages are arranged in parallel, for example, as shown in FIG. As shown, a structure in which the first stage condensing coil 126a, the second stage condensing coil 126b, and the third stage condensing coil 126c are arranged in three stages may be employed.
When adopting a multi-stage structure, the positional relationship of each stage depends on the speed of the ventilated air, such as a structure arranged in a straight line in the vertical direction as shown in FIG. 4B or a structure arranged in a staggered pattern. Accordingly, it is possible to adopt a structure in which the effect of condensation / liquefaction of the refrigerant R flowing into the condensation coil 126 is sufficiently exhibited.

Furthermore, a fin for heat dissipation may be provided in the condensing coil 126 shown in FIGS. 4A and 4B.
By providing the fins, the surface area of the outer peripheral wall surface in the condensing coil 126 is increased and more regions contributing to the evaporation of the cooling water CW are secured, and the cooling water CW adhering to the fins is evaporated and sent to the condensing coil 126. The sensible heat can be efficiently taken away from the gaseous refrigerant Rg.
Further, by providing the fins, the cooling water CW sprayed from the sprinkling unit 130 is all evaporated to be used for cooling the refrigerant R, and the eliminator 150 for collecting the cooling water CW that has not evaporated is unnecessary, and the eliminator 150 is provided. The pressure loss caused by this can be reduced, the speed of the air being ventilated can be increased, and the load on the ventilating fan 140 that generates the airflow can be further reduced to reduce the power consumption of the ventilating fan 140.

  The evaporative condenser 100 according to the first embodiment of the present invention thus obtained is a refrigerant cooling section 120 that cools and condenses the refrigerant R that is sequentially sent through the cooling cycle Sc for ammonia condensation. A water sprinkler 130 for sprinkling the coolant CW into the coolant cooler 120 to cool the coolant cooler 120, and an air inlet 112 for sucking air to evaporate the coolant CW sprinkled from the water sprinkler 130 A casing 110 having an air discharge port 114 for discharging air and a ventilation fan 140 for generating an air flow from the air suction port 112 to the air discharge port 114 inside the casing 110 are provided. It has a condensing coil 126 that is inclined with respect to the direction and cools while flowing and flowing down the refrigerant R, and the water sprinkling unit 130 is inclined along the condensing coil 126. By providing the plurality of water spray nozzles 134 for spraying the cooling water toward the condensing coil 126, the gaseous refrigerant Rg sequentially circulated through the ammonia condensing cooling cycle Sc is liquefied efficiently. The cooling water CW sprinkled from the sprinkler 130 is evaporated by the air sucked into the casing 110 to evaporate more of the latent heat of evaporation from the condensing coil 126, and from the gaseous refrigerant Rg to the inner periphery of the condensing coil 126. The wall surface is deprived of much heat, and the gaseous refrigerant Rg can be efficiently cooled and condensed and liquefied into the liquid refrigerant Rl.

Further, the refrigerant cooling unit 120 has an upstream side refrigerant gas supply header 122 upstream of the condensing coil 126 and a downstream side refrigerant liquid discharge header 124, and the plurality of condensing coils 126 supply upstream side refrigerant gas supply. Between the header 122 and the downstream refrigerant liquid discharge header 124, they are arranged in parallel to each other.
As a result, the gaseous refrigerant Rg can be efficiently cooled and condensed and liquefied into the liquid refrigerant Rl.

Further, a water spray section 130 is provided below the condensing coil 126 that is in the forward direction with ventilation, and a plurality of water spray nozzles 134 that incline and arrange the cooling water CW toward the condensing coil 126 along the condensing coil 126. have.
Thereby, the time for the liquid refrigerant Rg to stay and adhere can be shortened.
Furthermore, since the eliminator 150 provided between the refrigerant cooling unit 120 and the water sprinkling unit 130 and the ventilation fan 140 is inclined along the refrigerant cooling unit 120 and the water sprinkling unit 130, the consumption of the cooling water CW Can be reduced.
Further, a connecting pipe is provided for each of the upstream side refrigerant gas supply header 122 and the downstream side refrigerant liquid discharge header 124 of the refrigerant cooling unit 120, and the upstream side refrigerant gas supply header 122 and the downstream side refrigerant liquid of the adjacent refrigerant cooling unit 120. By connecting with the discharge header 124, the condensation load of the refrigeration equipment becomes flexible, the condensation load according to the scale can be obtained by simply increasing or decreasing the quantity, and the initial cost required for the development of the refrigeration equipment is suppressed. The effect is enormous.

Next, an evaporative condenser 200 that is a second embodiment of the present invention will be described with reference to FIGS.
Here, FIG. 5 is a schematic view of the evaporative condenser 200 according to the second embodiment of the present invention as seen from the front obliquely front, and FIG. 6 is a cross-sectional view taken along the line 6-6 in FIG. FIG. 7 is a conceptual diagram in which a cooling water purifying unit is connected to the evaporative condenser according to the second embodiment of the present invention.

  The evaporative condenser 200 of the second embodiment is obtained by changing the forms of the casing 110, the refrigerant cooling part 120, and the watering part 130 in the evaporative condenser 100 of the first embodiment described above, and is fundamental. Since the structure and operation principle of the evaporative condenser are the same as those of the evaporative condenser 100 of the first embodiment, the common items are described in detail by attaching the reference numbers in the 200 series in which the last two digits are common. Description is omitted.

  As shown in FIGS. 5 and 6, the evaporative condenser 200 according to the second embodiment of the present invention includes a casing 210, an inclined plate-shaped refrigerant cooling section 220 that cools and condenses the refrigerant R, and the refrigerant. An inclined plate-like water spraying section 230 for spraying the cooling water CW to the cooling section 220 to cool the refrigerant cooling section 220, a ventilation fan 240, an eliminator 250, a water spray pump 260, a water supply pipe 270, and a cooling water purification section. 280.

The casing 210 includes a first air suction port 212a, a second air suction port 212b, an air discharge port 214, and a water collection tank 216.
The first air inlet 212 a and the second air inlet 212 b are openings for sucking air from the outside of the casing 210, and are provided on a pair of opposing casing side walls of the casing 210.
The air discharge port 214 is an opening for discharging air from the inside of the casing 210, and is provided on the top surface of the casing 210.

The refrigerant cooling unit 220 includes a first upstream refrigerant gas supply header 222a, a second upstream refrigerant gas supply header 222b, a downstream refrigerant liquid discharge header 224, a first condensing coil 226a, Condensing coil 226b is comprised.
The first upstream refrigerant gas supply header 222 a is a straight pipe provided on the upstream side of the refrigerant cooling unit 220 and installed at a high position on the casing side wall surface of the casing 210.
The second upstream refrigerant gas supply header 222b is provided on the upstream side of the refrigerant cooling unit 220, and is installed directly on a high position on the casing side wall surface of the casing 210 facing the first upstream refrigerant gas supply header 222a. It is a tube.
The downstream-side refrigerant liquid discharge header 224 is a straight pipe that is provided on the downstream side of the refrigerant cooling unit 220 and is installed at a low position on the casing bottom wall surface side facing the air discharge port 214.

The first condensing coil 226a and the second condensing coil 226b are each configured by intuition.
The plurality of first condensing coils 226a are respectively connected and provided between the first upstream refrigerant gas supply header 222a and the downstream refrigerant liquid discharge header 224 in a state of being spaced apart from each other and arranged on the side wall surface of the casing. It is inclined from the top toward the casing bottom wall surface facing the air discharge port 214.
The plurality of second condensing coils 226b are connected and provided between the second upstream refrigerant gas supply header 222b and the downstream refrigerant liquid discharge header 224 in a state of being spaced apart from each other in parallel, and the first upstream The casing 210 is inclined from the upper side wall surface of the casing 210 facing the side refrigerant gas supply header 222a toward the casing bottom wall surface facing the air discharge port 214.
And the refrigerant | coolant cooling part 220 becomes a cross-sectional view V-shape or U-shape which consists of two inclined plates arranged inclining down on the casing side wall surface which the casing 210 opposes, or has a structure according to it.

The water sprinkling unit 230 is provided on the lower side corresponding to the windward side of the refrigerant cooling unit 220.
The watering part 230 is comprised from the cooling water supply header 232, the 1st watering nozzle 234a, and the 2nd watering nozzle 234b.
The cooling water supply header 232 is a straight pipe provided on the upstream side of the sprinkling unit 230 to which the cooling water CW is sent from the sprinkling pump 260 and erected at a low position directly below the top surface of the casing 210.

The 1st watering nozzle 234a and the 2nd watering nozzle 234b are each comprised from the straight pipe | tube.
The plurality of first watering nozzles 234a are installed along the lower side of the first condensing coil 226a so as to be forward in the direction of airflow while being spaced apart from each other, and face the air outlet 214 from the casing side wall surface. It is inclined and arranged toward the casing bottom wall surface side.
The plurality of second watering nozzles 234b are installed along the lower side of the second condensing coil 226b so as to be in the forward direction for ventilation, and air is supplied from the casing side wall surface of the casing 210 facing the first watering nozzle 234a. The casing is inclined on the side of the casing bottom wall facing the outlet 214.
The water sprinkling unit 230 has a V-shaped or U-shaped cross-sectional view composed of two inclined plates in the shape of so-called comb blades installed along the lower side of the refrigerant cooling unit 420, or a structure equivalent thereto. ing.

As a result, the flow of air across the first condensing coil 226a and the second condensing coil 226b is faster on the casing bottom wall surface facing the air outlet 214 than on the casing side wall surface of the casing 210. As the air advances to the downstream side of the coil 226a and the second condensing coil 226b, more air evaporates the cooling water CW attached to the outer peripheral wall surfaces of the first condensing coil 226a and the second condensing coil 226b to evaporate latent heat. It is easy to take away.
Furthermore, compared to when the air passes so that the condenser coils arranged in the horizontal direction such as the refrigerant cooling part used in the conventional evaporative condenser intersect at an angle close to a right angle, the horizontal direction When the air passes so as to intersect the first condensing coil 226a and the second condensing coil 226b that are inclined to each other at a small angle, the adjacent first condensing coil 226a and the second condensing that the airflow passes through. The gap between the coils 226b is expanded, and the pressure loss that becomes the resistance of the airflow passing through the gap is reduced in accordance with the extension of the gap, and the same pressure as in the case of using the conventional arrangement of the condensing coil is reduced. It is possible to increase the wind speed until loss occurs.

For example, the width W, which is the depth length, is constant, the length of the plate-like refrigerant cooling unit horizontally arranged as in the conventional case is L, and the inclined plate-like refrigerant cooling unit 220 of the present invention is in the horizontal direction. In the case of an inclined arrangement in which the liquid refrigerant Rl is discharged from the vertically lower side by a length of 1.7 L than before, that is, the refrigerant cooling section of the present invention when arranged so as to be two sides of an inverted equilateral triangle. The length of 220 is derived to be about 2 L by the three-square theorem, and the entrance area calculated by the product of length and width is about 2 LW, or about twice.
Here, when the air volume is constant, the air volume is calculated by the product of the inlet area and the wind speed. Therefore, in order to pass the same air volume as the conventional condenser through the refrigerant cooling section 220, the thickness of the refrigerant cooling section 220 is reduced by half. Can be thinned.

Furthermore, since the coolant cooling unit 220 is provided so as to face the pair of casing side wall surfaces, the inlet area through which the air flows is doubled, and the wind speed can be reduced to half.
Here, the air resistance of the refrigerant cooling unit 220 is roughly proportional to the square of the speed and the thickness of the refrigerant cooling unit 220.
Then, since the ventilation speed and the thickness of the refrigerant cooling unit 220 are each halved, the air resistance of the refrigerant cooling unit 220 is reduced to about 1/8, and the power consumption of the ventilation fan 240 is greatly reduced. Can do.
In addition, by reducing the ventilation speed by half, noise associated with ventilation of the refrigerant cooling unit 220 is also reduced.

The eliminator 250 is provided between the refrigerant cooling unit 220 and the ventilation fan 240, and is inclined from the casing side wall surface to the casing bottom wall surface side facing the air discharge port 214 along the refrigerant cooling unit 220 and the water sprinkling unit 230. It is comprised by the V-shaped shape (concave shape) made.
Thereby, compared with the case where the eliminator 250 is provided in the air outlet 214 of the casing 210 as in the prior art, the mist-like cooling water CW sprinkled from the sprinkler 230 that does not contribute to the cooling of the refrigerant cooler 220 is the eliminator. Collected early at 250.

  The first condensing coil 226a is composed of a plurality of straight pipes that are inclined downward from the top surface toward the casing side wall surface, and the second condensing coil 226b is the first condensing coil 226a from the top surface side. Are formed by a plurality of straight pipes that are inclined downward toward the casing side wall surface facing the casing side wall surface, and a water spray nozzle is arranged on the lower side corresponding to the windward side or the upper side corresponding to the leeward side in each condensing coil 226. Also good.

As shown in FIG. 7, the cooling water purification unit 280 is a cooling water purification system for purifying the cooling water CW collected and collected by the eliminator 250 and returned to the water collection tank 216. 216 and the cooling water supply header 232 of the sprinkler 230.
The cooling water purification unit 280 includes a filtration tank 282, an adsorption tank 284, a permeable membrane tank 286, a fresh water tank 288, and a circulation pump 289, which are connected to each other in order.

The filter tank 282 is filled with a filter medium 282a.
The adsorption tank 284 is filled with an adsorbent 284a.
The permeable membrane tank 286 is filled with a permeable membrane 286a.
Further, the permeable membrane tank 286 is provided with a drain pipe 286p for directly returning the cooling water CW to the water collecting tank 216 in addition to a water pipe for sending the cooling water CW to the fresh water tank 288.

The fresh water tank 288 is a water storage tank that stores the amount of water stored according to the use conditions of the cooling water CW in the evaporative condenser 200.
Further, the fresh water tank 288 is provided with an overflow pipe 288 p that directly returns the cooling water CW to the water collecting tank 216 in addition to a water supply pipe that sends the cooling water CW to the circulation pump 289.

The filtration tank 282 removes dust in the air mixed in the cooling water CW sent from the water collection tank 216.
The adsorption tank 284 removes toxic gas or corrosive gas in the air mixed in the cooling water CW sent from the filtration tank 282.

The permeable membrane tank 286 removes impurities other than water such as ions and salts mixed in the cooling water CW sent from the adsorption tank 284.
Further, when the cooling water CW does not reach the water quality suitable for use even after passing through the permeable membrane tank 286, it is returned directly to the water collection tank 216 via the drain pipe 286p.

The fresh water tank 288 stores the cooling water CW sent from the permeable membrane tank 286.
Further, when the amount of stored water in the fresh water tank 288 exceeds a certain amount, the amount of stored water can be kept constant by returning the cooling water CW directly from the fresh water tank 288 to the water collection tank 216 via the overflow pipe 288p. It is also possible to reduce the load of the cooling water purification unit 280 by diluting the concentration of impurities or toxic gases dissolved in the water CW.
Then, the circulating pump 289 sends the cooling water CW stored in the fresh water tank 288 to the cooling water supply header 232 of the watering unit 230 for watering.

As a result, the cooling water purification unit 280 is configured such that the impurities concentrated from the cooling water CW by sprinkling, dust or toxic gas mixed from the air at the time of water sprinkling, the refrigerant cooling unit 220 installed in the casing 210, the water sprinkling unit 230, etc. Remove impurities that cause dirt and corrosion.
The cooling water purification unit 280 senses a change in the water quality of the cooling water CW, and when the water quality becomes inappropriate for use in the evaporative condenser 200 or before the water quality becomes inappropriate, It has a timer function that periodically purifies CW and replaces part or all of it.
Thereby, the cooling water purification | cleaning part 280 removes an impurity from the cooling water CW regularly, and keeps the cooling water CW in the water quality suitable for use.

Note that the filtration tank 282, the adsorption tank 284, and the permeable membrane tank 286 may be omitted if unnecessary depending on the quality of the cooling water CW.
Further, the fresh water tank 288 may be omitted, and the cooling water CW purified by the permeable membrane tank 286 may be discharged to the water collection tank 216.
Furthermore, piping that connects each other by integrating a plurality of tanks may be omitted.
As shown in FIG. 7, the cooling water CW is replenished by using a method of supplying water to the water collection tank 216 through the water supply pipe 290, but the water supply pipe 290 is connected to the filtration tank 282 from the water spray pump 260. A method of supplying water via a cooling water purification system, such as a method of supplying water by connecting to a filtration tank or a method of supplying water by connecting directly to the filtration tank 282, may be employed.

  In the evaporative condenser 200 according to the second embodiment of the present invention thus obtained, the first air suction port 212a and the second air suction port 212b have a pair of opposing casing sides of the casing 210. A casing bottom is provided on the wall surface, an air outlet 214 is provided on the top surface of the casing 210, and the first condensing coil 226a and the second condensing coil 226b are opposed to the air outlet 214 from above the casing side wall surface. By being inclined toward the wall surface side, the downstream side of the first condensing coil 226a and the second condensing coil 226b can cool the gaseous refrigerant Rg more efficiently than the upstream side of the first condensing coil 226a and the liquid state. The refrigerant Rl can be condensed and liquefied, and cooling of the refrigerant can be promoted.

  Furthermore, the sprinkling unit 230 is connected to the cooling water purification unit 280 that purifies the cooling water CW, thereby improving the water quality of the cooling water CW and preventing the performance of the evaporative condenser 200 from being deteriorated. The effect is enormous, such as being able to reduce the frequency.

Next, an evaporative condenser 300 that is a third embodiment of the present invention will be described with reference to FIGS.
Here, FIG. 8 is a schematic view of the evaporative condenser 300 according to the third embodiment of the present invention as seen from the front oblique front, and FIG. 9 is a sectional view taken along the line 9-9 in FIG. FIG. 10 is a cross-sectional view taken at 10-10 in FIG.

  The evaporative condenser 300 of the third embodiment is obtained by changing the positions of the refrigerant cooling section 120, the water spray section 130, and the eliminator 150 in the evaporative condenser 100 of the first embodiment described above. Since the structure and operation principle of the evaporative condenser is the same as that of the evaporative condenser 100 of the first embodiment, the common items are denoted by the reference numbers in the 300s in the lower two digits. Detailed description is omitted.

  As shown in FIGS. 8 and 9, the evaporative condenser 300 is an inclined plate-shaped refrigerant cooling unit that cools and condenses the refrigerant R sequentially sent through the casing 310 and the ammonia condensation cooling cycle Sc. Part 320, an inclined plate-like water spraying part 330 for spraying the cooling water CW to cool the refrigerant cooling part 320, a ventilation fan 340, an eliminator 350, a watering pump 360, and a water pipe 370. And.

Inside the casing 310, a refrigerant cooling unit 320, a water sprinkling unit 330, and a ventilation fan 340 are installed.
The refrigerant cooling unit 320 includes an upstream side refrigerant gas supply header 322, a downstream side refrigerant liquid discharge header 324, and a condensing coil 326.
The condensation coil 326 is provided between the upstream side refrigerant gas supply header 322 and the downstream side refrigerant liquid discharge header 324, and is inclined with respect to the horizontal direction.
The refrigerant cooling unit 320 has an inclined plate-like structure.

The water sprinkling unit 330 is provided on the upper side corresponding to the lee of the refrigerant cooling unit 320.
The water sprinkling unit 330 includes a cooling water supply header 332 and a watering nozzle 334.

The watering nozzle 334 is composed of a plurality of straight pipes, is provided on the upper side of the condensing coil 326 so as to be opposite to the ventilation, and is inclined along the condensing coil 326.
In addition, each of the plurality of straight pipes constituting the watering nozzle 334 has an inclined plate-like structure that is arranged in parallel to each other and has a so-called comb blade shape.
That is, the inclined plate-shaped refrigerant cooling section 320 and the inclined plate-shaped water sprinkling section 330 are inclined with respect to the horizontal direction, and the water spraying section 330 is arranged in parallel at a constant distance on the upper side corresponding to the lee of the refrigerant cooling section 320. It has been installed.
Thereby, the direction of the cooling water CW sprinkled from the water sprinkling part 330 and the direction of the air flow are reversed, and the contact speed between the cooling water CW and the air is further increased to enhance the cooling effect of the cooling water itself. .

  The eliminator 350 includes a ventilation fan 340 and a water spray unit in order to prevent the cooling water CW in the form of water droplets accompanying the flow of air discharged from the air discharge port 314 from splashing outside the casing 310 from the air discharge port 314. 330.

In the evaporative condenser 300 according to the third embodiment of the present invention thus obtained, the watering part 330 is provided on the upper side of the condensing coil 326 of the refrigerant cooling part 320 and is inclined along the condensing coil 326. The cooling water CW sprinkled from the sprinkling unit 330 has the outer peripheral wall surface of the condensing coil 326 down from the upper side by having a plurality of sprinkling nozzles 334 that sprinkle the cooling water CW toward the condensing coil 326. Evaporate while moving to.
And the outer peripheral wall surface in the condensation coil 326 is utilized effectively.

Next, an evaporative condenser 400 that is a fourth embodiment of the present invention will be described with reference to FIGS. 11 and 12.
Here, FIG. 11 is a schematic view of an evaporative condenser 400 according to a fourth embodiment of the present invention as seen from the front oblique front, and FIG. 12 is a cross-sectional view taken along 12-12 in FIG. is there.

  The evaporative condenser 400 of the fourth embodiment is the same as the casing 110, the refrigerant cooling unit 120, the water spraying unit 130, and the eliminator 150 in the evaporative condenser 100 of the first example, and the refrigerant cooling unit 120. Since the basic evaporative condenser structure and operation principle are the same as those of the evaporative condenser 100 of the first embodiment, the common matters are the same. The detailed description will be omitted by attaching the reference numerals in the 400s in common with the last two digits.

As shown in FIGS. 11 and 12, the evaporative condenser 400 according to the fourth embodiment of the present invention includes a casing 410, an inclined plate-like refrigerant cooling section 420 that cools and condenses the refrigerant R, and the refrigerant. The cooling unit 420 is provided with an inclined plate-like water spraying unit 430 that sprays the cooling water CW to cool the refrigerant cooling unit 420, a ventilation fan 440, an eliminator 450, a watering pump 460, and a water supply pipe 470.
The casing 410 is composed of a first air inlet 412a, a second air inlet 412b, an air outlet 414, and a water collection tank 416.

The first air suction port 412 a and the second air suction port 412 b are openings for sucking air from the outside of the casing 410, and are provided on a pair of opposing casing side walls of the casing 410.
The air discharge port 414 is an opening for discharging air from the inside of the casing 410, and is provided on the top surface of the casing 410.

The refrigerant cooling section 420 includes a first upstream refrigerant gas supply header 422a, a second upstream refrigerant gas supply header 422b, a first downstream refrigerant liquid discharge header 424a, and a second downstream refrigerant liquid discharge. The header 424b, the first condensing coil 426a, and the second condensing coil 426b are configured.
The first upstream refrigerant gas supply header 422a is a straight pipe provided on the upstream side of the refrigerant cooling section 420 and erected at a high position on the casing side wall surface of the casing 410.

The second upstream refrigerant gas supply header 422b is provided on the upstream side of the refrigerant cooling section 420, and is directly installed on a high position on the casing side wall surface of the casing 410 facing the first upstream refrigerant gas supply header 422a. It is a tube.
The first downstream refrigerant liquid discharge header 424a and the second downstream refrigerant liquid discharge header 424b are provided on the downstream side of the refrigerant cooling section 420, and are installed at a low position on the casing bottom wall surface facing the air discharge port 414. Straight pipe.

Each of the first condensing coil 426a and the second condensing coil 426b is composed of a straight pipe.
The plurality of first condensing coils 426a are respectively connected and provided between the first upstream refrigerant gas supply header 422a and the first downstream refrigerant liquid discharge header 424a in a state of being spaced apart and in parallel with each other. It is inclined from the side wall surface toward the casing bottom wall surface facing the air discharge port 414.
The plurality of second condensing coils 426b are respectively connected and provided between the second upstream refrigerant gas supply header 422b and the second downstream refrigerant liquid discharge header 424b in a state of being spaced apart from each other in parallel. 1 is arranged to be inclined from the casing side wall surface of the casing 410 facing the upstream refrigerant gas supply header 422a toward the casing bottom wall surface side facing the air discharge port 414.
And the refrigerant | coolant cooling part 420 becomes a cross-sectional view V-shape or U-shape which consists of two inclined plates inclinedly arranged from the casing side wall surface which the casing 410 opposes, or has a structure according to it.

The water sprinkling unit 430 is provided on the upper side corresponding to the lee of the refrigerant cooling unit 420.
The water sprinkling unit 430 includes a first cooling water supply header 432a, a second cooling water supply header 432b, a first watering nozzle 434a, and a second watering nozzle 434b.
The first cooling water supply header 432a is a straight pipe provided on the upstream side of the water sprinkling unit 430 to which the cooling water CW is sent from the water sprinkling pump 460, and is installed at a high position on the casing side wall surface of the casing 410.
The second cooling water supply header 432b is provided on the upstream side of the sprinkling unit 430 to which the cooling water CW is sent from the sprinkling pump 460, and is provided on the casing side wall surface of the casing 410 facing the first cooling water supply header 432a. A straight pipe installed at a high position.

The 1st watering nozzle 434a and the 2nd watering nozzle 434b are each comprised from the straight pipe | tube.
The plurality of first watering nozzles 434a are installed along the upper side of the first condensing coil 426a so as to be in the opposite direction to the ventilation, and from the casing side wall surface toward the casing bottom wall surface facing the air discharge port 414. It is tilted.
The plurality of second watering nozzles 434b are installed along the upper side of the second condensing coil 426b so as to be in the opposite direction to the ventilation, and air is exhausted from the casing side wall surface of the casing 410 facing the first watering nozzle 434a. It is inclined and arranged on the casing bottom wall surface facing the outlet 414.
The water sprinkling unit 430 has a structure equivalent to a V-shaped or U-shaped cross-sectional view formed by two inclined plates in the shape of so-called comb blades installed along the upper side of the refrigerant cooling unit 420. Yes.

100, 200, 300, 400 ... evaporative condensers 110, 210, 310, 410 ... casing 112, 312 ... air inlet
212a, 412a .. First air inlet
212b, 412b .... Second air inlets 114, 214, 314, 414 ... Air outlets 116, 216, 316, 416 ... Water collection tanks 120, 220, 320, 420 ... Refrigerant cooling section 122, 322... Upstream refrigerant gas supply header
222a, 422a .. First upstream refrigerant gas supply header
222b, 422b ··· Second upstream side refrigerant gas supply headers 124, 224, 324 ... downstream side refrigerant liquid discharge headers
424a .. First downstream refrigerant liquid discharge header
424b .. Second downstream side refrigerant liquid discharge header 126, 326... Condensation coil
226a, 426a .. First condensing coil
226b, 426b .. second condensing coils 130, 230, 330, 430... Sprinklers 132, 232, 332... Cooling water supply header
432a .. First cooling water supply header
432b Second cooling water supply header 134, 334 Water spray nozzle
234a, 434a .. First watering nozzle
234b, 434b .. Second water spray nozzles 140, 240, 340, 440 ... Ventilation fans 150, 250, 350, 450 ... Eliminators 160, 260, 360, 460 ... Water spray pumps 170, 270, 370 470: Water pipe
280: Cooling water purification unit
282 ... Filtration tank
284 ... Adsorption tank
286 permeable membrane tank
288 ... Shimizu tank
289 ... Circulation pump CW ... Cooling water R ... Refrigerant (carbon dioxide refrigerant)
Rg ... Gaseous refrigerant Rl ... Liquid refrigerant S ... Refrigeration system Sa ... Primary ammonia refrigeration cycle Sb ... Secondary carbon dioxide cooling cycle Sc ... Cooling for ammonia condensation cycle

Claims (6)

An inclined plate-shaped refrigerant cooling section that circulates through the cooling cycle for condensation and cools and condenses the refrigerant that is sequentially sent, and an inclined plate shape that cools the refrigerant cooling section by spraying cooling water into the refrigerant cooling section. A casing having an air inlet for sucking air for evaporating cooling water sprayed from the water sprinkler, and an air outlet for discharging air, and an air outlet from the air inlet inside the casing An evaporative condenser having a ventilation fan for generating an airflow to
The refrigerant cooling section has a plurality of condensing coils that cool down while flowing down and flowing through the refrigerant in a downwardly inclined manner with respect to the horizontal direction;
The evaporative condenser, wherein the watering section has a plurality of watering nozzles that are inclined along the condensing coil to spray the cooling water toward the condensing coil.   The evaporative condenser according to claim 1, wherein the water sprinkling unit is inclined and arranged on the windward side of the refrigerant cooling unit.   3. The eliminator provided between the refrigerant cooling unit and the water sprinkling unit and the ventilation fan is disposed to be inclined along the refrigerant cooling unit and the water sprinkling unit. Evaporative condenser. The air inlet is provided on a pair of opposing casing side walls of the casing;
The air outlet is provided on the top surface of the casing;
4. The condenser coil according to any one of claims 1 to 3, wherein the condensing coil is inclined downward from the upper side of the casing side wall toward the casing bottom wall surface facing the air discharge port. The evaporative condenser described.   The evaporative condenser according to any one of claims 1 to 4, wherein the water sprinkling unit is connected to a cooling water purification unit that purifies the cooling water.   A refrigeration system comprising a condensing cooling cycle having the evaporative condenser according to any one of claims 1 to 5.