WO2020066259A1

WO2020066259A1 - Cooling device

Info

Publication number: WO2020066259A1
Application number: PCT/JP2019/029278
Authority: WO
Inventors: 高宏岩崎
Original assignee: 富士電機株式会社
Priority date: 2018-09-25
Filing date: 2019-07-25
Publication date: 2020-04-02
Also published as: CN111226085A; JP7215040B2; JP2020051646A; CN111226085B

Abstract

A cooling device 30 that cools a prescribed area by means of air cooled by an evaporator 31, and that is equipped with: a condenser 33 which, together with the evaporator 31, a compressor 32, and an expansion mechanism 34, forms a refrigeration circuit in which a refrigerant is sealed, and which dissipates heat from the refrigerant compressed by the compressor 32 into air passing the vicinity of the condenser, thereby condensing the refrigerant; an evaporation tray 36 which is arranged on the back side of the condenser 33 and collects condensed water generated by the evaporator 31; and a substantially rectangular parallelepiped evaporation suction body 37, which is erected in the evaporation tray 36 and draws in the condensed water by capillary action, and which evaporates the condensed water due to the passage, in the vicinity of the evaporation suction body, of air into which heat has been dissipated by the condenser 33. An upper end portion 37a of the evaporation suction body 37 is formed so as to gradually extend upward from a front side toward a back side.

Description

Cooling system

The present invention relates to a cooling device.

Conventionally, a cooling device including a cooling unit and an evaporation unit is known. The cooling unit includes an evaporator, a compressor, and a condenser. The evaporator evaporates the supplied refrigerant to cool air passing around the evaporator. The compressor sucks and compresses the refrigerant evaporated by the evaporator. The condenser condenses the refrigerant compressed by the compressor. An expansion mechanism is provided between the condenser and the evaporator. The expansion mechanism adiabatically expands the refrigerant condensed in the condenser and supplies the refrigerant to the evaporator.

The evaporating unit includes an evaporating dish and an evaporating sheet. The evaporating dish stores dew water generated in the cooling unit. The evaporating sheet is provided upright on the evaporating dish and sucks dew condensation water by capillary action.

In such a cooling device, the condenser is installed in an upright position such that the refrigerant compressed by the compressor flows in the vertical direction while meandering in the left-right direction, and the evaporating unit is disposed on the rear side of the condenser. It is installed in. Then, by driving a blower fan installed at a predetermined location, the air that has passed through the condenser passes through the evaporating unit so that the dew condensation water evaporates (for example, see Patent Document 1).

Japanese Patent No. 5685994

In the cooling device proposed in Patent Document 1 described above, the evaporating sheet is formed upright on the evaporating dish in a flat plate shape, and the air that has passed through the condenser is sufficiently heated by the heat radiation of the refrigerant. The condensed water sucked into the evaporating sheet is evaporated by the air passing through the condenser before reaching the upper end portion of the evaporating sheet. In other words, the upper end portion of the evaporating sheet is always in a dry state, not only does not contribute to the evaporation of the dew condensation water, but also becomes a resistance of the air passing therethrough, causing a pressure loss of the air passing the condenser. .

In view of the above circumstances, an object of the present invention is to provide a cooling device that can improve the evaporation of dew condensation water while reducing the pressure loss of air passing through a condenser.

In order to achieve the above object, a cooling device according to the present invention constitutes a refrigeration circuit in which a refrigerant is sealed together with an evaporator, a compressor, and an expansion mechanism, and transmits the refrigerant compressed by the compressor around itself. A condenser for dissipating heat to the passing air and condensing the same; an evaporating dish installed at the rear side of the condenser for storing dew water generated by the evaporator; And a substantially rectangular parallelepiped evaporation suction body that evaporates the dew condensation water by passing the air radiated by the condenser through the surroundings, and the air cooled by the evaporator. A cooling device for cooling a predetermined area, wherein the evaporation suction body is formed so that an upper end portion thereof gradually extends upward from the front to the rear.

Further, the present invention is characterized in that in the cooling device, the evaporative suction body is formed so as to be inclined such that an upper end portion gradually extends upward from the front to the rear. .

Further, according to the present invention, in the cooling device, the condenser is installed in an upright position in which a length in a front-rear direction is shorter than a downside position, and a wind tunnel provided on a rear side of the evaporation suction body. The air is provided horizontally so as to close the upper opening, and the air passing through the condenser passes through the evaporative suction body, passes through the inside of the wind tunnel, and is discharged upward from the upper opening. And a blower fan for blowing air.

Further, in the cooling device according to the present invention, a plurality of the blowing fans are provided in a form arranged in a horizontal direction, and the wind tunnels are provided to be separated from each other along a horizontal direction according to the blowing fans. Characterized in that it comprises a wall member.

According to the present invention, since the evaporating suction body is formed in such a manner that the upper end portion gradually extends upward from the front to the rear, the evaporating suction body has a front portion which is a portion close to the condenser. An effective area for evaporating the dew condensation water can be provided up to the upper end portion, and the resistance portion of the passing air can be reduced. Thereby, there is an effect that the evaporation of the dew condensation water can be improved while reducing the pressure loss of the air passing through the condenser.

FIG. 1 is a sectional side view schematically showing an internal structure of a showcase to which a cooling device according to an embodiment of the present invention is applied. FIG. 2 is a perspective view showing the cooling device shown in FIG. FIG. 3 is a perspective view showing a main part of the cooling device shown in FIG. FIG. 4 is a perspective view showing a longitudinal section of a main part of the cooling device shown in FIG. FIG. 5 is an enlarged view showing a case where the evaporation suction body shown in FIGS. 3 and 4 is viewed from the front. FIG. 6 is a perspective view showing the internal structure of the wind tunnel shown in FIGS.

Hereinafter, preferred embodiments of the cooling device according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a cross-sectional side view schematically showing an internal structure of a showcase to which a cooling device according to an embodiment of the present invention is applied. The showcase illustrated here includes a case body 10.

The case body 10 is a heat-insulating housing having an opening (hereinafter, also referred to as a front opening) 10a on the front surface. The case body 10 has a storage chamber 11 defined therein, and is provided with an air circulation means 20 and a cooling device 30.

The storage room 11 is a room defined so as to face the front opening 10a, and a plurality (five in the illustrated example) of product storage shelves 12 are arranged side by side in the vertical direction. The product mounting shelves 12 are for mounting products, respectively.

デッキ A deck pan 13 is provided at the bottom of the storage room 11. The deck pan 13 is for placing a commodity like the commodity placing shelf 12.

Further, a suction port 14 is formed in a lower front part of the storage chamber 11, and an air outlet 15 is formed in a front upper part of the storage chamber 11.

The suction port 14 is an opening for sucking air inside the storage room 11, and extends along the left-right direction of the storage room 11. The outlet 15 is an opening for blowing air into the storage chamber 11. The outlet 15 extends in the left-right direction of the storage room 11. Although not shown in the drawing, a rectifying member having a honeycomb structure is appropriately attached to the outlet 15.

The air circulation means 20 includes an air passage 20a and a circulation fan 20b. The air passage 20 a is an air passage from the suction port 14 to the outlet 15.

Such an air passage 20a communicates with the suction port 14 and is outside the storage chamber 11 and below the lower air passage 21 and outside the storage chamber 11 and on the back side An air passage 22, a storage box 23 outside and above the storage room 11, and an upper air passage 24 outside and above the storage room 11 and communicating with the outlet 15. They are configured so as to communicate with each other.

The circulation fan 20b is for driving and circulating air, and is provided at a predetermined portion of the lower air passage 21. In the present embodiment, the circulation fan 20b is provided at a predetermined portion of the lower air passage 21. However, in the present invention, the arrangement position of the circulation fan 20b is not particularly limited, and a circulation fan It may be provided anywhere as long as it can exhibit the function of 20b.

In such an air circulating means 20, when the circulating fan 20b is driven, the air inside the storage chamber 11 is sucked through the suction port 14, and the sucked air passes through the air passage 20a. The air is circulated between the inside and the outside of the storage chamber 11 by being sent out up to 15 and being blown out into the storage chamber 11 through the outlet 15.

FIG. 2 is a perspective view showing the cooling device 30 shown in FIG. As shown in FIG. 2, the cooling device 30 includes a cooling unit 30a and an evaporation unit 30b.

The cooling unit 30a is configured by sequentially connecting an evaporator 31, a compressor 32, a condenser 33, and an expansion mechanism 34 by a refrigerant pipe 35. The evaporator 31 is installed inside the storage box 23 and cools the air passing through the storage box 23 by evaporating the supplied refrigerant. When driven, the compressor 32 sucks and compresses the refrigerant evaporated by the evaporator 31.

The condenser 33 is installed in a standing posture in front of the top wall of the main body cabinet. As shown in FIG. 3, the condenser 33 has a flat refrigerant passage pipe 33a in which a plurality of refrigerant flow paths are juxtaposed and extends vertically while meandering in the left-right direction. An inlet header 33b is connected to the inlet side of 33a, and an outlet header 33c is connected to the outlet side of the refrigerant passage tube 33a. A corrugated fin member 33d is thermally connected between the horizontally extending portions of the refrigerant passage tube 33a. The refrigerant pipe 35 connected to the outlet side of the compressor 32 is connected to the inlet header 33b, and the refrigerant pipe 35 connected to the expansion mechanism 34 is connected to the outlet header 33c. The condenser 33 is configured to condense the refrigerant by exchanging heat between the refrigerant compressed by the compressor 32 and passing through the refrigerant flow path and the air passing therearound.

That is, the condenser 33 is provided in an upright posture in which the refrigerant compressed by the compressor 32 flows in the vertical direction while meandering in the left-right direction, and the refrigerant compressed by the compressor 32 meanders in the left-right direction. It is installed in such a manner that the length in the front-rear direction is shorter than the sideways posture in the front-rear direction.

The expansion mechanism 34 adiabatically expands the refrigerant condensed in the condenser 33 to a low-temperature and low-pressure state and supplies the refrigerant to the evaporator 31.

(4) As shown in FIG. 4, the evaporating unit 30b is installed on the rear side of the condenser 33 and on the front side of the storage box 23, and includes an evaporating dish 36 and an evaporating suction body 37.

The evaporating dish 36 is for storing dew water generated in the evaporator 31 constituting the cooling unit 30a through a gutter (not shown).

複数 A plurality (two in the illustrated example) of the evaporative suction bodies 37 are provided, each of which has a substantially rectangular parallelepiped shape. These evaporating suction bodies 37 are provided upright on the evaporating dish 36 at the rear side of the condenser 33 so as to be arranged side by side with each other. The evaporating suction body 37 is formed by processing filter paper. More specifically, as shown in FIG. 5, when viewed from the front, the evaporating suction body 37 is a flat flat plate that is parallel to each other and separated from each other. The corrugated sheet member 372 is sandwiched between the mold sheet members 371. The evaporation suction body 37 sucks the dew water stored in the evaporating dish 36 by the flat sheet member 371 and disperses the dew water on the corrugated sheet member 372 by capillary action.

蒸発 Such an evaporation suction body 37 is formed such that the upper end portion 37a is inclined so as to gradually extend upward from the front to the rear, and the upper surface 37b is an inclined surface.

A wind tunnel 40 is provided above the evaporating dish 36 and behind the evaporating suction body 37. As shown in FIG. 6, the wind tunnel 40 has a pair of left and right side walls 41, a rear wall 42 connecting the rear ends of the side walls 41, and an upper end of the side walls 41. Also includes a continuous upper wall 43 and a pedestal wall 44 provided to face the upper wall 43. That is, the wind tunnel 40 has a rectangular parallelepiped shape with an open front surface. The side wall 41 has a front end extending forward from the upper wall 43 and the pedestal wall 44, and covers both side areas of the evaporation suction body 37.

A rectangular upper opening 43a is formed in the upper wall 43 of the wind tunnel 40 over substantially the entire area, and a plurality of (four in the illustrated example) blowers 45 are arranged in a manner to close the upper opening 43a. It is provided horizontally in a row in the direction. These blower fans 45 send out the air that has passed through the wind tunnel 40 when driven, upward from the upper opening 43a.

複数 A plurality (three in the illustrated example) of wall members 46 are provided on the pedestal wall 44 of the wind tunnel 40. These wall members 46 are provided apart from each other along the left-right direction so as to extend upward from portions facing the portion between the blower fans 45 adjacent to each other on the pedestal wall 44. That is, the wall members 46 are provided separately from each other in the left-right direction according to the blower fan 45.

In the showcase having the above-described configuration, when the circulation fan 20b is driven, the air inside the storage chamber 11 is sucked through the suction port 14 and passes through the lower air passage 21 and the rear air passage 22. Then, the user enters the storage box 23. The air that has entered the storage box 23 passes through the upper air passage 24, reaches the outlet 15, and is blown out from the outlet 15. The air blown out from the outlet 15 flows toward the inlet 14 while passing through the tip of each product mounting shelf 12 to form an air curtain.

In the cooling device 30, when the compressor 32 is driven, the refrigerant compressed by the compressor 32 is condensed by the condenser 33 and reaches the expansion mechanism. The refrigerant sent to the expansion mechanism 34 is adiabatically expanded and sent to the evaporator 31, and evaporates by exchanging heat with air passing through the storage box 23 while passing through the refrigerant flow path of the evaporator 31. The evaporated refrigerant is sucked by the compressor 32 and circulates.

By driving the compressor 32 in this manner, the air passing through the storage box 23 is cooled, and the cooled air is blown out from the outlet 15, and as a result, the internal air in the storage chamber 11 is released. The product placed on the product placing shelf 12 and the deck pan 13 is cooled.

When the compressor 32 is driven, dew water is generated in the evaporator 31, and the generated dew water is supplied to the evaporating dish 36 through a gutter and stored in the evaporating dish 36.

In the cooling device 30, when the blower fan 45 is driven, the air outside the case body 10 passes through the condenser 33 from the front to the rear, and then passes through the evaporative suction body 37. The air that has passed through the evaporative suction body 37 in this manner reaches the inside of the wind tunnel 40, and is sent out between the side wall 41 and the wall member 46 or between the wall members 46 and above the upper opening 43a. You.

By the way, the air heated by the condenser 33 passes through a front part of the evaporative suction body 37 that is close to the condenser 33, and a front part of the evaporative suction body 37 that is separated from the condenser 33 has the front part. The air in which the dew condensation water evaporates passes through the portion. That is, air having a large difference from the saturated water vapor pressure passes through the front part of the evaporative suction body 37, and air having a small difference from the saturated water vapor pressure passes through the rear part of the evaporative suction body 37. .

Therefore, in a state where the air heated by the condenser 33 is passed, the height at which the dew water can be sucked up from the evaporating dish 36 at the front part of the evaporating suction body 37 and the evaporation at the rear part of the evaporating suction body 37 There is a difference between the height at which the condensed water can be sucked up from the plate 36, and the height at which the condensed water can be suctioned is greater in the rear portion than in the front portion.

Thus, if the upper and lower dimensions of the front part and the upper limit of the rear part are equivalent in the evaporative suction body, the upper end part of the front part is always in a dry state, and a waste area that does not contribute to the evaporation of the dew condensation water. Will be.

In this regard, in the cooling device 30 according to the embodiment of the present invention, the evaporative suction body 37 is formed so as to be inclined so that the upper end portion 37a gradually extends upward from the front to the rear. As a result, an effective area for evaporating the dew condensation water up to the upper end portion of the front portion, which is a portion close to the condenser 33, can be formed, and the resistance portion of the passing air can be reduced. Thereby, evaporation of dew condensation water can be made favorable while reducing the pressure loss of the air passing through the condenser 33.

According to the cooling device 30, the condenser 33 is installed in the upright posture in which the length in the front-rear direction is shorter than the sideways posture, and is installed on the evaporating dish 36 on the rear side of the condenser 33. A blower fan 45 provided horizontally so as to close an upper opening 43 a of a wind tunnel 40 provided on the rear side of the evaporative suction body 37 is provided after the air passing through the condenser 33 passes through the evaporative suction body 37. Since the air is blown so as to pass through the inside of the inner space 40 and to be sent upward from the upper opening 43a, the dimension in the front-rear direction is reduced as compared with the conventional installation of the condenser in a sideways posture. The size of the entire device can be reduced. In addition, since the air that has passed through the condenser 33 from the front to the rear by the blower fan 45 is sent upward from the upper opening 43a of the wind tunnel 40, the air sent from the upper opening 43a acts on the blower fan 45. Thereby, passage through the condenser 33 can be suppressed.

According to the cooling device 30, when viewed from the front, the evaporative suction body 37 has a wavy corrugated sheet member 372 between the flat flat sheet members 371 separated from each other in a manner parallel to each other. Between the flat sheet member 371 and the corrugated sheet member 372, the contact area with the air blown by the blower fan 45 can be increased. Thus, the amount of air blown can be sufficiently ensured. Therefore, dew condensation water can be satisfactorily evaporated. Moreover, since the air passing through the evaporating suction body 37 is air passing through the condenser 33, the air whose temperature has risen and the relative humidity has decreased in the condenser 33 passes through the evaporating suction body 37, and the dew condensation occurs. Water can be evaporated well.

According to the cooling device 30, since the wall members 46 are provided on the pedestal wall 44 of the wind tunnel 40 along the left and right direction in accordance with the blower fan 45, the wall member 46 is separated from the wind tunnel 40 by driving the blower fan 45. When the air inside passes between the side wall 41 and the wall member 46 or between the wall members 46, the wall member 46 acts as a rectifying member for guiding the air, thereby driving the plurality of blowing fans 45. It is possible to prevent the passing air from interfering with each other to generate turbulence.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to this, and various changes can be made.

In the above-described embodiment, the evaporating suction body 37 is formed to be inclined so that the upper end portion 37a gradually extends upward from the front to the rear. In this case, the upper end does not necessarily have to be formed in an inclined manner, and the upper end may be formed so as to extend upward in a stepwise manner from the front to the rear, for example. That is, the form is not limited as long as the upper end is formed so as to gradually extend upward from the front to the rear.

In the above-described embodiment, the cooling device 30 applied to the showcase has been described. However, the present invention is not limited to the showcase, and may be applied to a vending machine or the like.

In the above-described embodiment, when viewed from the front, the evaporating and aspirating body 37 has the wavy corrugated sheet member 372 between the flat flat sheet members 371 vertically separated from each other in a manner parallel to each other. Although configured to be sandwiched, the present invention may have a honeycomb structure when viewed from the front.

Reference Signs List 30 cooling device, 30a cooling unit, 30b evaporating unit, 31 evaporator, 32 compressor, 33 condenser, 34 expansion mechanism, 36 evaporating dish, 37 evaporating suction body, 37a upper end , 40 ... wind tunnel, 43a ... upper opening, 45 ... blowing fan.

Claims

A condenser that constitutes a refrigeration circuit in which a refrigerant is sealed together with an evaporator, a compressor, and an expansion mechanism, and that radiates the refrigerant compressed by the compressor to air passing around itself and condenses the refrigerant.
An evaporating dish that is installed on the rear side of the condenser and stores dew water generated in the evaporator,
An evaporative suction body having a substantially rectangular parallelepiped shape, which stands on the evaporating dish and sucks the dew condensation water by capillary action, and evaporates the dew condensation water by air radiated by the condenser passing around. And a cooling device for cooling a predetermined area with air cooled by the evaporator,
The cooling device, wherein the evaporation suction body is formed so that an upper end portion thereof gradually extends upward from the front to the rear.
The cooling device according to claim 1, wherein the evaporating suction body is formed so that an upper end thereof is inclined so as to gradually extend upward from the front to the rear.
The condenser is installed in a standing position in which the length in the front-rear direction is shorter than the sideways position,
It is provided horizontally so as to close the upper opening of the wind tunnel provided on the rear side of the evaporation suction body, and the air passing through the condenser passes through the evaporation suction body after passing through the evaporation suction body, and The cooling device according to claim 1, further comprising a blower fan that blows the air so as to be blown upward from an upper opening.
A plurality of the blower fans are provided in a form arranged in a horizontal direction,
The cooling device according to claim 3, wherein the wind tunnel includes wall members provided apart from each other along the left-right direction according to the blower fan.