JP5740963B2 - Heat exchanger - Google Patents

Description

  The present invention relates to a heat exchanger, and more particularly to a heat exchanger that constitutes a refrigeration cycle, a heat pump cycle, and the like.

  Conventionally, in vending machines that sell products such as canned beverages and beverages in plastic bottles, heat that is a component device such as a refrigeration cycle or heat pump cycle is placed in the machine room (outside of the main body cabinet) that is the main body of the vending machine. An exchanger is provided.

  In this type of heat exchanger, a flat refrigerant passage pipe in which a plurality of refrigerant flow paths are juxtaposed is extended in a meandering manner, and an inlet-side header is provided on the inlet side of the refrigerant passage pipe. An outlet header is connected to the outlet side. Corrugated fins are joined and disposed between the horizontally extending portions of the refrigerant passage tube. More specifically, the corrugated fin is formed to be bent in a wave shape, and the bent portion outside is joined between the horizontally extending portions of the refrigerant passage pipe (see, for example, Patent Document 1). ).

JP-A-8-29016

  When using the heat exchanger as proposed in Patent Document 1 described above as an evaporator, it is necessary to install a drain pan for storing drain water (condensation water). That is, the heat exchanger can be installed only at a location where a drain pan can be installed in the lower region in the machine room (outside the cabinet) of the main body cabinet, and as a result, the installation location may be limited.

  An object of this invention is to provide the heat exchanger which can be installed in a desired location without a restriction | limiting in an installation place, even when used as an evaporator in view of the said situation.

To achieve the above object, the heat exchanger according to the present onset Ming, constitute a flow path of the refrigerant, and a refrigerant tube that extends in a meandering shape, the upstream portion and the downstream side in the refrigerant passage pipe A heat exchanger comprising a first fin member that is thermally connected to a portion and that passes through the refrigerant passage pipe and a first fin member that promotes heat exchange with a fluid that passes through the refrigerant passage pipe; A second fin member that is thermally connected to a lowermost portion of the refrigerant passage pipe and disposed in a manner protruding downward from the portion; and is directly connected to the second fin member; and And a drain pan for storing drain water dripped from at least one of the refrigerant passage pipe and the fin member , wherein the drain pan is formed of the same material as the second fin member .

Further, the present invention is characterized in that, in the heat exchanger, the second fin member is formed to be bent in a wave shape, and the outside of its upper bent portion is connected to the lowest position. To do.

  According to the present invention, the refrigerant passage pipe is thermally connected to the lowermost part and thermally connected to the second fin member arranged in a manner protruding downward from the part. Since the drain pan stores the drain water dripped from at least one of the refrigerant passage pipe and the fin member, it is necessary to dispose a drain container for storing the drain water in the lower area when the heat exchanger is installed. Thus, the position where the drain container can be disposed is not limited. Therefore, even when it is used as an evaporator, there is an effect that it can be installed at a desired location without restriction on the installation location.

FIG. 1 is a cross-sectional view showing a case where an internal structure of a vending machine to which a heat exchanger according to an embodiment of the present invention is applied is viewed from the front. 2 is a cross-sectional side view showing the internal structure of the vending machine shown in FIG. FIG. 3 is a rear view schematically showing the external heat exchanger shown in FIG. FIG. 4 is a plan view schematically showing the external heat exchanger shown in FIG. 5 is a cross-sectional view taken along line AA in FIG. FIG. 6 is an explanatory view showing a state where the end of the drain pan shown in FIGS. 3 and 4 is developed.

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

  FIG. 1 is a cross-sectional view showing a case where an internal structure of a vending machine to which a heat exchanger according to an embodiment of the present invention is applied is viewed from the front. The vending machine illustrated here includes a main body cabinet 1.

  The main body cabinet 1 has a rectangular shape with an open front surface. The main body cabinet 1 is provided with three independent commodity containers 3 partitioned by, for example, two heat insulating partition plates 2 in a side-by-side manner. This product storage 3 is for storing products such as canned beverages and beverages containing plastic bottles while maintaining a desired temperature, and has a heat insulating structure.

  2 is a cross-sectional side view showing the internal structure of the vending machine shown in FIG. As shown in FIG. 2, an outer door 4 and an inner door 5 are provided on the front surface of the main body cabinet 1. The outer door 4 is for opening and closing the front opening of the main body cabinet 1, and the inner door 5 is for opening and closing the front surface of the commodity storage 3. The inner door 5 is divided into upper and lower parts, and the upper door 5a opens and closes when a product is replenished.

  The product storage 3 is provided with a product storage rack 6, a carry-out mechanism 7 and a carry-out shooter 8. The commodity storage rack 6 is for storing commodities in a manner arranged in the vertical direction. The carry-out mechanism 7 is provided at the lower part of the product storage rack 6 and is used to carry out the products at the bottom of the product group stored in the product storage rack 6 one by one. The carry-out shooter 8 is for guiding the product carried out from the carry-out mechanism 7 to the product take-out port 4 a provided in the outer door 4.

  An in-compartment heat exchanger 24 is disposed below the carry-out shooter 8. The internal heat exchanger 24 is disposed on the front side of the rear duct D. The internal heat exchanger 24 is connected to the compressor 21, the external heat exchanger 22, the expansion mechanism 23, and the refrigerant pipe 25 disposed in the machine room 9 to form the refrigerant circuit 20. Here, the compressor 21 sucks the refrigerant through the suction port, compresses the sucked refrigerant to be in a high-temperature and high-pressure state (high-temperature and high-pressure refrigerant), and discharges it from the discharge port. The expansion mechanism 23 is for adiabatic expansion by reducing the pressure of the passing refrigerant.

  The external heat exchanger 22 and the internal heat exchanger 24 have different functions depending on the circulation direction of the refrigerant in the refrigerant circuit 20. The external heat exchanger 22 is a heat exchanger according to the present embodiment, and functions as a condenser that condenses the refrigerant when the high-temperature and high-pressure refrigerant is supplied from the compressor 21. When the adiabatically expanded refrigerant is supplied, it functions as an evaporator that evaporates the refrigerant.

  The internal heat exchanger 24 functions as an evaporator that evaporates the refrigerant when the refrigerant adiabatically expanded from the expansion mechanism 23, while the high-temperature and high-pressure refrigerant is supplied from the compressor 21. It functions as a condenser that condenses the refrigerant.

  By circulating the refrigerant in one direction in these refrigerant circuits 20, that is, supplying the refrigerant compressed by the compressor 21 to the external heat exchanger 22 and circulating it, the refrigerant compressed by the compressor 21 is It is condensed by the external heat exchanger 22 and then adiabatically expanded by the expansion mechanism 23 and passes through the internal heat exchanger 24. When the refrigerant passes through the internal heat exchanger 24, heat is exchanged with the internal air (internal air) of the commodity storage 3 in which the internal heat exchanger 24 is disposed. Evaporates and cools the internal air. The evaporated refrigerant is sucked into the compressor 21.

  The cooled internal air moves inside the product storage 3 by driving the internal blower fan F1, so that the product stored in the product storage rack 6 of the product storage 3 has a desired temperature (for example, 5 ° C.). It will be cooled down.

  On the other hand, the refrigerant was compressed by the compressor 21 by circulating the refrigerant in the refrigerant circuit 20 in the other direction, that is, by supplying the refrigerant compressed by the compressor 21 to the internal heat exchanger 24 and circulating it. The refrigerant is condensed by the internal heat exchanger 24, and then adiabatically expanded by the expansion mechanism 23 and passes through the external heat exchanger 22. When the refrigerant passes through the internal heat exchanger 24, heat is exchanged with the internal air (internal air) of the commodity storage 3 in which the internal heat exchanger 24 is disposed. Condenses and heats the internal air. The condensed refrigerant is sent to the expansion mechanism 23.

  The heated internal air moves inside the product storage 3 by driving the internal blower fan F1, so that the product stored in the product storage rack 6 of the product storage 3 has a desired temperature (for example, 55 ° C.). Will be heated.

  Below, it demonstrates only when the external heat exchanger 22 functions as an evaporator. 3 and 4 schematically show the external heat exchanger shown in FIG. 2, FIG. 3 is a rear view, and FIG. 4 is a plan view. The external heat exchanger 22 illustrated here includes a refrigerant passage tube 221, an inlet-side header 222, an outlet-side header 223, and a first corrugated fin (first fin member) 224.

  As shown in FIG. 5, the refrigerant passage tube 221 is a flat tube in which refrigerant passages 2211 serving as a plurality of refrigerant channels are arranged in parallel, and is formed to meander from side to side. A plurality of (two in the illustrated example) refrigerant passage pipes 221 according to the present embodiment are provided, and each of them is formed to meander from side to side in a manner of being arranged along the direction in which internal air flows.

  The inlet-side header 222 is connected to the inlet-side end portion of the refrigerant passage tube 221 and is provided in a form communicating with each refrigerant passage 2211 of the refrigerant passage tube 221. The inlet header 222 is for adiabatically expanding by the expansion mechanism 23 and for supplying the refrigerant supplied through the refrigerant pipe 25 to each refrigerant passage 2211.

  The outlet-side header 223 is connected to the outlet-side end portion of the refrigerant passage tube 221 and is provided in a form communicating with each refrigerant passage 2211 of the refrigerant passage tube 221. The outlet header 223 is for sending the refrigerant that has passed through each refrigerant passage 2211, that is, the refrigerant evaporated by heat exchange, to the refrigerant pipe 25 connected to the compressor 21.

  The first corrugated fins 224 are made of the same material as the refrigerant passage tube 221 and are bent into a wave shape. These first corrugated fins 224 are disposed by joining their external bent portion 2241 between the horizontally extending portions 2212 in the refrigerant passage pipe 221 by brazing or the like. That is, the first corrugated fin 224 is formed by being bent in a wave shape, and the bent portion 2241 is thermally connected between the upstream side portion and the downstream side portion of the refrigerant passage pipe 221. It is.

  As shown in FIGS. 3 and 4, the external heat exchanger 22 includes a second corrugated fin (second fin member) 225 and a drain pan 226 in addition to the above configuration.

  The second corrugated fin 225 is formed of the same material as the first corrugated fin 224 and is formed to be bent into a wave shape. The second corrugated fin 225 is arranged such that the outside of the upper bent portion 2251 of the second corrugated fin 225 is joined to the lowermost portion of the refrigerant passage pipe 221, that is, the lower surface of the lowest horizontal extending portion 2213 by brazing or the like. is there. That is, the second corrugated fin 225 is formed to be bent in a wave shape, and the outside of its upper bent portion 2251 is thermally connected to the lowest portion 2213 in the refrigerant passage tube 221. is there.

  The drain pan 226 is made of the same material as the second corrugated fin 225, and is provided with an overlap margin 226b at the end as shown in an enlarged view in FIG. It forms a box shape whose upper surface is opened by brazing or the like. As shown in FIG. 4, the drain pan 226 has a larger shape than the refrigerant passage tube 221 when the external heat exchanger 22 is viewed from above. The drain pan 226 is disposed such that the upper surface of its bottom 226a is joined to the outside of the lower bent portion 2252 of the second corrugated fin 225 by brazing or the like and thermally connected to the second corrugated fin 225. It is.

  The drain pan 226 is for storing drain water dripped from the refrigerant passage pipe 221 and the corrugated fins (first corrugated fin 224 and second corrugated fin 225).

  In such an external heat exchanger 22, that is, the heat exchanger according to the present embodiment, the second corrugated fin 225 is thermally connected to the lowermost portion 2213 of the refrigerant passage tube 221, and the drain pan Since the 226 is configured to be heated by the second corrugated fin 225, when installing the external heat exchanger 22, it is necessary to dispose a drain container for storing drain water in a lower area thereof. This is not restrictive to where the drain container can be disposed.

  Therefore, according to the external heat exchanger 22 which is this Embodiment, even when used as an evaporator, it can install in a desired location without a restriction | limiting in an installation place.

  According to the external heat exchanger 22, the drain pan 226 is thermally connected to the second corrugated fin 225, and the second corrugated fin 225 is thermally connected to the refrigerant passage tube 221. In addition to the two corrugated fins 225, the drain pan 226 can also be used as a kind of heat transfer material, thereby improving the heat exchange performance.

  Moreover, according to the said external heat exchanger 22, since the drain pan 226 and the 2nd corrugated fin 225 are formed from the same material, the problem of corrosion by a dissimilar metal does not arise.

  As described above, the heat exchanger according to the present invention is useful for a refrigerant circuit used for heating a product in a vending machine or the like.

DESCRIPTION OF SYMBOLS 1 Main body cabinet 20 Refrigerant circuit 21 Compressor 22 External heat exchanger 221 Refrigerant passage pipe 2211 Refrigerant passage 2212 Horizontal extension part 222 Inlet side header 223 Outlet side header 224 1st corrugated fin (1st fin member)
225 Second corrugated fin (second fin member)
226 Drain pan 23 Expansion mechanism 24 Internal heat exchanger 25 Refrigerant piping

Claims (2)

A refrigerant passage pipe constituting a refrigerant flow path and extending in a meandering manner;
A first fin that is thermally connected between the upstream portion and the downstream portion of the refrigerant passage pipe and promotes heat exchange between the refrigerant that passes through the refrigerant passage pipe and the fluid that passes through the refrigerant passage pipe. In a heat exchanger comprising:
A second fin member that is thermally connected to a lowermost portion of the refrigerant passage pipe and disposed in a manner of projecting downward from the portion;
A drain pan connected directly to the second fin member and storing drain water dropped from at least one of the refrigerant passage tube and the fin member ;
The drain pan is formed from the same material as the second fin member .   2. The heat exchanger according to claim 1, wherein the second fin member is formed by being bent in a wave shape, and an outside of an upper bent portion of the second fin member is connected to the lowest position.

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