JP6946753B2 - Drain water treatment equipment - Google Patents

Description

The present invention relates to a drain water treatment device, and more particularly to a drain water treatment device applied to a showcase for holding a product to be stored in a desired temperature state.

Conventionally, as a drain water treatment device applied to a showcase for holding a product to be stored in a desired temperature state, one provided with an evaporating dish and a sprinkler unit is known.

The evaporating dish is installed in the machine room of the case body of the showcase in the lower region of the condenser which constitutes the refrigerating circuit in which the refrigerant is sealed together with the evaporator, the compressor and the expansion mechanism. This evaporating dish stores the condensed water generated from the evaporator installed in the storage chamber of the case body. Here, the condenser radiates the refrigerant compressed by the compressor to the air passing around itself from the front to the rear and condenses it.

The sprinkler unit is configured to have a built-in pump or the like, and when the pump is driven, the condensed water stored in the evaporating dish is supplied to the upper part of the condenser and sprinkled.

In such a drain water treatment device, by sprinkling the condensed water stored in the evaporative tray on the upper part of the condenser, the condensed water can be evaporated by the heat of the refrigerant passing through the condenser, and the condensed water can be evaporated. Condensed water can also be evaporated by the air passing through the vessel (see, for example, Patent Document 1).

Japanese Patent No. 3703870

By the way, in the above-mentioned drain water treatment device, an evaporating dish is installed in the lower region of the condenser installed in such a manner that air passes from the front to the rear, and the evaporating dish is placed on the upper part of the condenser by a sprinkler unit. Since the stored dew condensation water was sprinkled, the direction in which the sprinkled dew condensation water drips and the direction in which the air passes are substantially orthogonal to each other. Therefore, sufficient contact between the dripping dew condensation water and the passing air may not be ensured, and as a result, the evaporation of the dew condensation water may be insufficient.

In view of the above circumstances, it is an object of the present invention to provide a drain water treatment apparatus capable of improving the cooling efficiency of the refrigeration circuit and satisfactorily treating the condensed water.

In order to achieve the above object, the drain water treatment apparatus according to the present invention constitutes a refrigerating circuit in which a refrigerant is sealed together with an evaporator, a compressor and an expansion mechanism, and uses the refrigerant compressed by the compressor as its own. In a drain water treatment device provided with a condenser that dissipates heat to air passing through the surroundings to condense it, and an evaporator that is installed in the lower region of the condenser and stores condensed water generated by the evaporator. The condenser is installed so that the air passes along the vertical direction, and when a drive command is given, the dew condensation water stored in the evaporation pan is sent out to the upper part of the condenser. It is characterized by having.

Further, the present invention is provided with the first evaporation sheet body which is placed on the upper part of the condenser and absorbs or drops the condensed water sent out by the water feeding means in the drain water treatment apparatus. It is a feature.

Further, the present invention is characterized in that the drain water treatment apparatus includes a second evaporation sheet body that is erected on the evaporating dish and sucks the condensed water by a capillary phenomenon.

Further, the present invention is characterized in that the drain water treatment apparatus includes an auxiliary sheet body that supplies the condensed water delivered by the water feeding means to the entire area of the first evaporation sheet body.

Further, according to the present invention, in the drain water treatment apparatus, air is introduced toward the evaporating dish and the second evaporation sheet body, and the air passing around the second evaporation sheet body moves the condenser from below to above. It is characterized by being provided with a blowing means for sending out the air in a manner of passing toward the air.

According to the present invention, the condenser is installed in such a manner that air passes along the vertical direction, and when a drive command is given, the water supply means transfers the condensed water stored in the evaporating dish to the condenser. Since it is sent to the upper part, the condenser can be cooled and the contact time between the sent dew condensation water and the air can be sufficiently secured. As a result, the cooling efficiency of the refrigeration circuit can be improved, and the dew condensation water treatment can be satisfactorily performed.

FIG. 1 is a cross-sectional side view schematically showing the internal structure of a showcase to which the drain water treatment apparatus according to the embodiment of the present invention is applied. FIG. 2 is a perspective view showing the condenser shown in FIG. FIG. 3 is a front view schematically showing the configuration of an evaporation unit constituting the drain water treatment apparatus according to the embodiment of the present invention. 4A and 4B are explanatory views schematically showing the supply of water to the first evaporation sheet body through the water supply means, where FIG. 4A shows the start of supply and FIG. 4B shows after the start of supply.

Hereinafter, preferred embodiments of the drain water treatment apparatus 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 the internal structure of a showcase to which the drain water treatment apparatus according to the 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 formed on the front surface. The case body 10 is provided with an air circulation means 20 and a drain water treatment device 30 as well as a storage chamber 11 defined inside the case main body 10.

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

A deck pan 13 is arranged at the bottom of the storage chamber 11. The deck pan 13 is for mounting products in the same manner as the product loading shelf 12.

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

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

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

Such an air air passage 20a communicates with the suction port 14 and is outside the storage chamber 11 and below the lower air air passage 21, and outside the storage chamber 11 and on the back side thereof. The air air passage 22, the storage box 23 outside the storage chamber 11 and above the air air passage 22, and the upper air air passage 24 outside the storage chamber 11 above the storage chamber 11 and communicating with the air outlet 15 are provided. It is configured in a manner that communicates with each other.

The circulation fan 20b is driven to circulate air, and is arranged at a predetermined portion of the lower air air passage 21. In the present embodiment, the circulation fan 20b is arranged at a predetermined portion of the lower air air passage 21, but in the present invention, the arrangement position of the circulation fan 20b is not particularly limited and will be described later. It may be arranged anywhere as long as it can exert the function of the circulation fan 20b.

In such an air circulation means 20, the air inside the storage chamber 11 is sucked through the suction port 14 by driving the circulation fan 20b, and the sucked air passes through the air air passage 20a. Air is circulated between the inside and the outside of the storage chamber 11 by being sent out to 15 and blowing air into the inside of the storage chamber 11 through the air outlet 15.

The drain water treatment device 30 includes a refrigeration circuit 30a and an evaporation unit 30b. The refrigeration circuit 30a is configured by sequentially connecting an evaporator 31, a compressor 32, a condenser 33, and an expansion mechanism 34 by a refrigerant pipe.

The evaporator 31 is installed inside the storage box 23, and cools the air passing through the inside of the storage box 23 by evaporating the supplied refrigerant. By driving the compressor 32, the refrigerant evaporated by the evaporator 31 is sucked and compressed.

The condenser 33 is arranged in a sideways posture so as to allow air to pass along the vertical direction. As shown in FIG. 2, the condenser 33 is extended in such a manner that a flat refrigerant passage pipe 33a in which a plurality of refrigerant passages are arranged side by side meanders, and an inlet header is provided on the inlet side of the refrigerant passage pipe 33a. 33b is connected to the outlet header 33c on the outlet side of the refrigerant passage pipe 33a. Then, corrugated fins 33d are thermally connected between the horizontally extending portions of the refrigerant passage pipe 33a. A refrigerant pipe connected to the outlet side of the compressor 32 is connected to the inlet header 33b, and a refrigerant pipe connected to the expansion mechanism 34 is connected to the outlet header 33c. Such a condenser 33 condenses the refrigerant by heat exchange between the refrigerant that is compressed by the compressor 32 and passes through the refrigerant flow path and the air that passes through the surroundings.

The expansion mechanism 34 adiabatically expands the refrigerant condensed by the condenser 33 to bring it into a low-temperature and low-pressure state, and supplies it to the evaporator 31.

FIG. 3 is a front view schematically showing the configuration of the evaporation unit 30b. As shown in FIG. 3, the evaporation unit 30b includes an evaporating dish 35, a second evaporation sheet body 36, a first evaporation sheet body 37, a water supply means 38, and a blower means 39.

The evaporating dish 35 is installed in the lower region of the condenser 33. The evaporating dish 35 is for storing the condensed water generated in the evaporator 31 constituting the freezing circuit 30a through a gutter (not shown).

The second evaporation sheet body 36 has an evaporation filter 36a and a strip-shaped sheet 36b. A plurality of evaporation filters 36a (two in the illustrated example) are provided, and each of them has a rectangular shape. These evaporation filters 36a are erected on the evaporating dish 35 in such a manner that they are paired left and right with each other and their inner surfaces face each other. The evaporation filter 36a has a honeycomb-shaped filter paper, and sucks the condensed water stored in the evaporating dish 35 by a capillary phenomenon.

A plurality of strip-shaped sheets 36b are provided. These strip-shaped sheets 36b are erected on the evaporation plate 35 so as to be lined up in the front-rear direction between the pair of left and right evaporation filters 36a. Similar to the evaporation filter 36a, the strip-shaped sheet 36b sucks the condensed water stored in the evaporating dish 35 by capillarity.

Although not specified in the drawing, the first evaporation sheet body 37 is a rectangular porous member formed in such a manner that a large number of hollow portions extend in the vertical direction. The first evaporation sheet body 37 is placed on the upper part of the condenser 33.

The water supply means 38 includes a water supply line 38a and a water supply pump 38b. The water supply line 38a is composed of a tubular member made of a flexible material such as a hose. One end of the water supply line 38a penetrates the side wall of the evaporating dish 35 and is arranged inside the evaporating dish 35, and the other end is arranged above the first evaporation sheet 37.

The water supply pump 38b is provided in the middle of the water supply line 38a. The water supply pump 38b is driven when a drive command is given from the control unit 40, and the condensed water stored in the evaporating dish 35 is circulated through the water supply line 38a and sent to the first evaporation sheet body 37. Is.

Here, the control unit 40 controls the drive of the water supply pump 38b. When an ON signal is given from the water level detection sensor S that detects the water level of condensed water inside the evaporating dish 35, the control unit 40 gives a drive command to the water supply pump 38b for a predetermined time (for example, about several minutes). ) Elapses, the water supply pump 38b is driven. Further, the water level detection sensor S is like a float switch, for example, and gives an on signal to the control unit 40 when the water level of the condensed water stored in the evaporating dish 35 reaches a predetermined height. be.

By the way, the other end of the water supply line 38a is arranged above the auxiliary sheet body 37a provided on the upper surface of the first evaporation sheet body 37. As shown in FIG. 4A, the auxiliary sheet body 37a forms a path for the condensed water when the condensed water is sent out through the water supply line 38a, as shown in FIG. 4B. The delivered dew condensation water is supplied to the entire area of the first evaporation sheet body 37.

The blower means 39 includes a blower fan 39a and a blower guide 39b. The blower fan 39a is installed so that two are arranged in front and back on the right side of the right evaporation filter 36a, and two are installed in front and back on the left side of the left evaporation filter 36a to form a pair on the left and right. Is. These blower fans 39a are always driven, and send out the air outside the case body 10 toward the evaporation filter 36a.

The blower guide 39b extends along the front-rear direction in such a manner as to maintain the distance between the strip-shaped sheets 36b. The upper end of the blower guide 39b projects upward from the strip-shaped sheet 36b. The blower guide 39b guides the air passing through the evaporation filter 36a and passing between the strip-shaped sheets 36b upward by the blower fan 39a, that is, guides the air toward the condenser 33, and guides the air toward the condenser 33. Air passes through 33 from below to above.

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

In the drain water treatment 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 34. The refrigerant sent to the expansion mechanism 34 is adiabatically expanded and sent to the evaporator 31, and heat exchanges with the air passing through the storage box 23 while passing through the refrigerant flow path of the evaporator 31 to evaporate. The evaporated refrigerant is sucked into the compressor 32 and circulates.

By driving the compressor 32 in this way, 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 of the storage chamber 11 is released. It is cooled, and the product placed on the product storage shelf 12 or the like is cooled.

Further, when the compressor 32 is driven, dew condensation water is generated in the evaporator 31, and the generated dew condensation water is supplied to the evaporating dish 35 through the trough and stored in the evaporating dish 35.

Then, in the drain water treatment device 30, the air outside the case body 10 is introduced into the evaporation unit 30b by the blower fan 39a that is constantly driven. That is, the air outside the case body 10 passes between the evaporation filter 36a and the strip-shaped sheet 36b. As the air passes between the evaporation filter 36a and the strip-shaped sheet 36b in this way, the condensed water sucked by the evaporation filter 36a and the strip-shaped sheet 36b evaporates, whereby the temperature of the air is lowered and cooled. NS. The air cooled by the evaporation of the condensed water in this way is sent upward by the blower guide 39b, passes through the condenser 33 from the bottom to the top, and then passes through the discharge port (not shown) of the case body 10. It is discharged to the outside of.

Further, in the drain water treatment device 30, when the water level of the condensed water stored in the evaporating dish 35 rises and an ON signal is given to the control unit 40 from the water level detection sensor S, the control unit 40 sends the water supply pump 38b. A drive command is given to drive the water supply pump 38b for a predetermined time. As a result, the condensed water in the evaporating dish 35 is sent to the first evaporation sheet 37 through the water supply line 38a. The dew condensation water delivered to the first evaporation sheet body 37 is supplied to the entire area of the first evaporation sheet body 37 by the auxiliary sheet body 37a, and is sucked into the first evaporation sheet body 37 or below the first evaporation sheet body 37. Drop into.

As described above, the air passing through the condenser 33 from the bottom to the top passes through the first evaporation sheet body 37, so that the condensed water sucked into the first evaporation sheet body 37 is evaporated. Further, the condensed water dripping downward from the first evaporation sheet 37 has an effect of cooling the condenser 33, and sufficiently contacts the air passing through the condenser 33 from the lower side to the upper side to bring the air into contact with the air. It has a cooling effect and, in some cases, evaporates upon contact with the air.

When the dew condensation water dripping further downward reaches the upper central portion 36b1 of the strip-shaped sheet 36b of the second evaporation sheet body 36, the upper central portion 36b1 of the strip-shaped sheet 36b, which tends to be in the driest state, is wetted. It is possible to expand the effective area for evaporating the condensed water.

As described above, according to the drain water treatment device 30 according to the embodiment of the present invention, the condenser 33 is installed in such a manner that air passes along the vertical direction, and the water supply means 38 is a drive command. Is given, the condensed water stored in the evaporating dish 35 is sent to the upper part of the condenser 33, so that the condenser 33 can be cooled and the contact time between the sent condensed water and the air can be set. It can be secured sufficiently. As a result, the cooling efficiency of the refrigerating circuit 30a can be improved, and the dew condensation water treatment can be performed satisfactorily.

In particular, since the first evaporation sheet 37 is placed on the upper part of the condenser 33 and absorbs or drops the condensed water sent out by the water feeding means 38 downward, the condenser 33 can be cooled. , The contact time between the discharged dew condensation water and the air can be sufficiently secured, and the sucked dew condensation water can be satisfactorily evaporated.

According to the drain water treatment device 30, the air outside the case body 10 is introduced into the evaporation unit 30b by the blower fan 39a that is constantly driven, passes between the evaporation filter 36a and the strip-shaped sheet 36b, and is passed by the blower guide 39b. Since it is sent to the condenser 33, the air passing through the evaporation unit 30b can be cooled and sent to the condenser 33, and the heat dissipation effect of the condenser 33 can be improved. As a result, the cooling efficiency of the refrigerating circuit 30a can be improved, and the dew condensation water treatment can be performed satisfactorily. In particular, when a showcase with a built-in drain water treatment device 30 is installed indoors such as a store as in the present embodiment, the drain water treatment device 30 is arranged in a higher temperature ambient environment indoors. The air introduced into the evaporation unit 30b becomes hot. When the air introduced into the evaporation unit 30b has a high temperature as described above, the evaporation of the condensed water in the evaporation filter 36a and the strip-shaped sheet 36b can be promoted, and the air passing through the condenser 33 is cooled. It is possible to improve the cooling efficiency and further improve the dew condensation water treatment.

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

In the above-described embodiment, the first evaporative sheet body 37 is placed on the upper part of the condenser 33, but in the present invention, even if the first evaporative sheet body is not placed on the upper part of the condenser. good. Further, although both the second evaporation sheet body 36 and the first evaporation sheet body 37 are provided, only one of them may be provided.

In the above-described embodiment, the drain water treatment device 30 applied to the showcase has been described, but in the present invention, the drain water treatment device 30 is not limited to the showcase and may be applied to vending machines and the like.

30 Drain water treatment device 30a Refrigeration circuit 30b Evaporation unit 31 Evaporator 32 Compressor 33 Condenser 34 Expansion mechanism 35 Evaporating dish 36 Second evaporation sheet body 36a Evaporating filter 36b Strip-shaped sheet 37 First evaporation sheet body 37a Auxiliary sheet body 38 Water supply means 38a Water supply line 38b Water supply pump 39 Blower means 39a Blower fan 39b Blower guide 40 Control unit S Water level detection sensor

Claims (2)

A condenser that constitutes a refrigerating circuit in which a refrigerant is sealed together with an evaporator, a compressor, and an expansion mechanism, and dissipates the refrigerant compressed by the compressor to air passing around itself to condense it.
In a drain water treatment device installed in the lower region of the condenser and provided with an evaporating dish for storing the condensed water generated in the evaporator.
The condenser is installed in such a manner that the air passes along the vertical direction.
A water supply means for sending the condensed water stored in the evaporating dish to the upper part of the condenser when a drive command is given.
A first evaporation sheet body that is placed on the upper part of the condenser and absorbs or drops the condensed water sent out by the water feeding means, and
A second evaporation sheet body that is erected on the evaporating dish and sucks the condensed water by a capillary phenomenon.
Air is introduced toward the evaporating dish and the second evaporation sheet body, and the air that has passed around the second evaporation sheet body is sent out in such a manner that the air passes through the condenser from the lower side to the upper side. Equipped with a means of ventilation,
The second evaporation sheet body is arranged below the condenser, and is arranged below the condenser.
And evaporation filters arranged side by side at to forming a rectangular-like form, and a pair aspect,
A plurality of strip-shaped sheets are provided between the pair of evaporation filters so as to be arranged in a direction orthogonal to the parallel direction of the evaporation filters, and the upper end portion thereof is below the upper end portion of the evaporation filter. A drain water treatment device characterized by. The drain water treatment apparatus according to claim 1, further comprising an auxiliary sheet body for supplying the condensed water delivered by the water feeding means to the entire area of the first evaporation sheet body.

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