JP2011007392A - Refrigerant circuit device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerant circuit device capable of reducing an amount of frost adhered to valve bodies of solenoid valves arranged in a low pressure region of a refrigerant circuit.SOLUTION: The refrigerant circuit device includes the refrigerant circuit 10 constituted by sequentially connecting, by refrigerant piping 25, interior heat exchangers 24 each evaporating a supplied refrigerant to a cool inner atmosphere in a chamber where the interior heat exchanger is arranged, a compressor 21 sucking and compressing the refrigerant evaporated by the respective interior heat exchangers 24, an exterior heat exchanger 22 condensing the refrigerant compressed by the compressor 21 and a first capillary tube 23 used for the adiabatic expansion of the refrigerant condensed by the exterior heat exchanger 22. The refrigerant circuit device further includes a heat insulating casing 60 having a heat insulating structure for storing valve bodies of the solenoid valves arranged in the low pressure region where the refrigerant is brought into a low pressure state in the refrigerant circuit 10 so as to surround the valve bodies together with part of the refrigerant piping 25 connected to upstream and downstream sides of the solenoid valves.

Description

  The present invention relates to a refrigerant circuit device, and more particularly to a refrigerant circuit device applied to, for example, a vending machine.

  Conventionally, as a refrigerant circuit device applied to, for example, a vending machine or the like, an apparatus having a refrigerant circuit configured by sequentially connecting an internal heat exchanger, a compressor, an external heat exchanger, and an expansion mechanism with a refrigerant pipe. Are known.

  The in-compartment heat exchanger is disposed in each of the commodity storage boxes of the vending machine. These internal heat exchangers cool the internal air (internal atmosphere) of the commodity storage in which they are disposed by evaporating the passing refrigerant. The compressor is disposed inside the vending machine main body and outside the product storage box, for example, in the machine room. The compressor sucks the refrigerant evaporated in each heat exchanger and compresses the sucked refrigerant. Then, it is discharged in a high temperature and high pressure state. The external heat exchanger is disposed in a place (machine room or the like) inside the vending machine main body and outside the commodity storage box like the compressor. This external heat exchanger heats ambient air, that is, dissipates heat to the ambient air, as the passing refrigerant condenses. The expansion mechanism is for adiabatically expanding the refrigerant condensed in the external heat exchanger.

  In such a refrigerant circuit, the refrigerant compressed by the compressor is condensed by the external heat exchanger, the condensed refrigerant is adiabatically expanded by the expansion mechanism, and is evaporated by each internal heat exchanger. The refrigerant evaporated in each internal heat exchanger is sucked by the compressor, compressed again, and circulated.

  In the refrigerant circuit device having such a refrigerant circuit, an electromagnetic valve arranged on the upstream side of the internal heat exchanger and allowing or restricting passage of the refrigerant adiabatically expanded by the expansion mechanism is provided with rainwater. In order to prevent the electromagnetic valve from getting wet due to, for example, a configuration in which the electromagnetic valve is covered with a cover member is known (for example, see Patent Document 1).

JP-A-9-198564

  By the way, since the solenoid valve as described above permits or regulates the passage of the refrigerant adiabatically expanded by the expansion mechanism, that is, the low-pressure and low-temperature refrigerant, it is known that frost adheres to the surface or the like. ing. Thus, if frost adheres and the amount of frost formation becomes excessive, it will be difficult to ensure good insulation of the solenoid valve, resulting in deterioration of insulation of the solenoid valve. Even if the electromagnetic valve is covered with a cover member as proposed in Patent Document 1 described above, if the entire surface of the electromagnetic valve is not covered, frost will adhere to the surface as a result. Thus, the insulation of the solenoid valve is deteriorated.

  In view of the above circumstances, the present invention reduces the amount of frost that adheres to the valve body of the solenoid valve by thermally insulating the solenoid valve disposed in the low pressure region where the refrigerant is in a low pressure state in the refrigerant circuit. An object of the present invention is to provide a refrigerant circuit device that can prevent insulation deterioration of a solenoid valve.

  In order to achieve the above object, a refrigerant circuit device according to claim 1 of the present invention comprises an internal heat exchanger that evaporates the supplied refrigerant and cools the internal atmosphere of the chamber in which the refrigerant circuit device is disposed, A compressor that sucks and compresses the refrigerant evaporated by the internal heat exchanger, an external heat exchanger that condenses the refrigerant compressed by the compressor, and the refrigerant condensed by the external heat exchanger In a refrigerant circuit device including a refrigerant circuit configured by sequentially connecting an expansion mechanism to be expanded with a refrigerant pipe, a valve body of an electromagnetic valve disposed in a low pressure region where the refrigerant is in a low pressure state in the refrigerant circuit, It is characterized by comprising a heat-insulating housing that is housed inside in a manner that surrounds together with a part of the refrigerant pipe connected to the upstream side and downstream side of the solenoid valve.

  The refrigerant circuit device according to claim 2 of the present invention is the refrigerant circuit device according to claim 1 described above, wherein the casing is disposed upstream of each of the internal heat exchangers and is adiabatically expanded by the expansion mechanism. The valve main body of the low-pressure side solenoid valve that restricts or permits the passage of the refrigerant is accommodated.

  The refrigerant circuit device according to claim 3 of the present invention is the refrigerant circuit device according to claim 1 or 2 described above, wherein the housing is provided for each of the valve bodies, and for each coupler constituting the electromagnetic valve together with each valve body. It is characterized by color printing on the surface.

  A refrigerant circuit device according to a fourth aspect of the present invention is the refrigerant circuit device according to any one of the first to third aspects, wherein a part of the refrigerant circuit device is exposed to the outside of the housing. The sheet body is provided with a sheet body that sucks condensed water generated in the interior of the interior of the housing by a capillary phenomenon and evaporates the exposed portion to the outside.

  A refrigerant circuit device according to a fifth aspect of the present invention is the refrigerant circuit device according to the fourth aspect, wherein the wind direction directs at least a part of the wind sent out by the blowing means toward the sheet body exposed to the outside of the casing. A member is provided.

  According to the refrigerant circuit device of the present invention, the casing of the heat insulating structure has the valve body of the electromagnetic valve disposed in the low pressure region where the refrigerant is in a low pressure state in the refrigerant circuit, on the upstream side and the downstream side of the electromagnetic valve. Since it is housed inside in such a manner that it is enclosed together with a part of the connected refrigerant pipe, the heat insulation of these solenoid valves can be improved. Therefore, the amount of frost adhering to each valve body of these solenoid valves can be reduced, and the insulation deterioration of the solenoid valves can be prevented.

FIG. 1 is a sectional view showing a case where an internal structure of a vending machine to which a refrigerant circuit device according to an embodiment of the present invention is applied is viewed from the front. FIG. 2 shows the internal structure of the vending machine shown in FIG. 1, and is a cross-sectional side view of the right commodity storage. FIG. 3 is a conceptual diagram conceptually showing the refrigerant circuit device according to the embodiment of the present invention. FIG. 4 is a conceptual diagram conceptually showing the refrigerant circuit device according to the embodiment of the present invention. FIG. 5 is a conceptual diagram conceptually showing the refrigerant circuit device according to the embodiment of the present invention. FIG. 6 is an explanatory diagram showing the configuration of the refrigerant circuit. FIG. 7 is an enlarged perspective view showing a main part of the refrigerant circuit shown in FIG. FIG. 8 is an exploded perspective view showing the heat insulating housing shown in FIGS. 6 and 7. FIG. 9 is a perspective view showing the heat insulating housing shown in FIGS. 6 and 7.

  Exemplary embodiments of a refrigerant circuit device according to the present invention will be explained below in detail with reference to the accompanying drawings.

  FIG. 1 is a sectional view showing a case where an internal structure of a vending machine to which a refrigerant circuit device 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.

  FIG. 2 shows the internal structure of the vending machine shown in FIG. 1, and is a cross-sectional side view of the right commodity storage. Here, the internal structure of the right product storage 3 (hereinafter also referred to as the right storage 3a) is shown, but the central product storage 3 (hereinafter also referred to as the intermediate storage 3b) and the left product storage 3 are shown. The internal structure (hereinafter also referred to as the left warehouse 3c as appropriate) has substantially the same configuration as the right warehouse 3a. In the present specification, the right side indicates the right side when the vending machine is viewed from the front, and the left side indicates the left side when the vending machine is viewed from the front.

  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 in the lower part of the product storage rack 6 and is used to carry out the products at the lowest level 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.

  FIG. 3 is a conceptual diagram conceptually showing the refrigerant circuit device according to the embodiment of the present invention. The refrigerant circuit device illustrated here includes a refrigerant circuit 10 including a main circuit 20, a branch path 30, a heat radiation path 40, and a return path 50.

  The main circuit 20 is configured by sequentially connecting a compressor 21, an external heat exchanger 22, a first capillary tube 23, and an internal heat exchanger 24 through a refrigerant pipe 25, and a refrigerant (for example, R134a) therein. Is enclosed.

  The compressor 21 is disposed in the machine room 9 as shown in FIG. The machine room 9 is a room inside the main body cabinet 1, partitioned from the product storage 3 and below the product storage 3. 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.

  As shown in FIG. 2, the external heat exchanger 22 is disposed in the machine room 9 similarly to the compressor 21. This external heat exchanger 22 condenses the refrigerant that passes therethrough. More specifically, the refrigerant compressed by the compressor 21 and discharged from the discharge port and sent out through the refrigerant pipe 25 is condensed by exchanging heat with ambient air. In the vicinity of the external heat exchanger 22, an external air blower fan F1 is disposed. The outside blower fan F1 is a blowing unit that takes in outside air and blows air around the outside heat exchanger 22.

  The refrigerant pipe 25 connecting the external heat exchanger 22 and the compressor 21 is provided with a high-pressure side electromagnetic valve 261. The high-pressure side electromagnetic valve 261 is a valve body that can be opened and closed. When the opening command is given from a control unit (not shown), the high-pressure side electromagnetic valve 261 opens and permits the passage of the refrigerant, while when the closing command is given. Is closed to restrict the passage of refrigerant.

  As shown in FIG. 2, the first capillary tube 23 is disposed in the machine room 9 similarly to the compressor 21 and the external heat exchanger 22. The first capillary tube 23 is an expansion mechanism that adiabatically expands by depressurizing the refrigerant passing therethrough.

  A plurality of (three in the illustrated example) heat exchangers 24 in the cabinet are provided, which are disposed in the lower interior of each commodity storage 3 and on the front side of the rear duct D (see FIG. 2). is there.

  The refrigerant pipe 25 connecting the internal heat exchanger 24 and the first capillary tube 23 is branched into three by a distributor 27 disposed in the middle thereof, and the internal heat disposed in the right warehouse 3a. On the inlet side of the exchanger 24 (hereinafter also referred to as the right internal heat exchanger 24a), the inlet of the internal heat exchanger 24 (hereinafter also referred to as the internal heat exchanger 24b) disposed in the intermediate warehouse 3b. The inlet side of the internal heat exchanger 24 (hereinafter also referred to as the left internal heat exchanger 24c) disposed inside the left warehouse 3c is connected to each side.

  Moreover, in this refrigerant | coolant piping 25, low pressure side solenoid valve 262,263, on the way from the divider | distributor 27 to each of the right side heat exchanger 24a, the center internal heat exchanger 24b, and the left side heat exchanger 24c. H.264 is provided. The low pressure side solenoid valves 262, 263, and 264 are openable and closable valve elements, which are opened when an opening command is given from the control unit and allow passage of the refrigerant, while when a closing command is given. Is closed to restrict the passage of refrigerant.

  Refrigerant piping 25 connected to the outlet side of the internal heat exchanger 24b and the left internal heat exchanger 24c merges at the first junction P1 on the way, and further to the outlet side of the right internal heat exchanger 24a. The connected refrigerant pipe 25 joins at the second joining point P <b> 2 and is connected to the compressor 21 via the accumulator 28. Here, the accumulator 28 is for storing the liquid-phase refrigerant and allowing the gas-phase refrigerant to pass through when the refrigerant passing therethrough is a gas-liquid mixed refrigerant.

  In the refrigerant pipe 25 connected to the outlet side of the internal heat exchanger 24b and the left internal heat exchanger 24c, return solenoid valves 265 and 266 are arranged upstream of the first junction P1, respectively. is there. The return solenoid valves 265 and 266 are valve bodies that can be opened and closed. When an opening command is given from a control unit (not shown), the feedback solenoid valves 265 and 266 are opened to allow passage of the refrigerant, while being given a closing command. In such a case, it is closed to restrict the passage of the refrigerant.

  The branch path 30 branches from a high-pressure side branch point P3 in the middle of the path between the compressor 21 and the high-pressure side electromagnetic valve 261, and further branches in the middle, one of which is on the inlet side of the internal heat exchanger 24b. The other is a path constituted by a branch pipe 31 that joins the refrigerant pipe 25 and the refrigerant pipe 25 on the inlet side of the left side heat exchanger 24c. This branch path 30 is a path for introducing the refrigerant (high-pressure refrigerant) compressed by the compressor 21. Here, in the refrigerant pipes 25 on the inlet side of the internal heat exchanger 24b and the left internal heat exchanger 24c, a path upstream from the junction with each branch pipe 31 (each branch path 30), that is, Check valves 267 and 268 are provided in a path between each junction and the low-pressure side solenoid valves 263 and 264 located upstream thereof.

  In the branch path 30, branch solenoid valves 321 and 322 are provided on the downstream side of the branch point, respectively. The branch solenoid valves 321 and 322 are valve bodies that can be opened and closed. When the opening command is given from the control unit, the branch solenoid valves 321 and 322 are opened to allow the passage of the refrigerant, while when the closing command is given, Thus, the passage of the refrigerant is restricted.

  That is, when the refrigerant compressed by the compressor 21 is supplied through the branch path 30, the inner heat exchanger 24 b and the left inner heat exchanger 24 c condense the refrigerant passing therethrough and become a target product. The internal air of the storage 3 (the central storage 3b and the left storage 3c) is heated.

  The heat radiation path 40 is branched in the middle of each of the refrigerant pipes 25 connected to the outlet side of the inner heat exchanger 24b and the left heat exchanger 24c, and merges at the third junction P4. This is a path constituted by a heat radiation pipe connected to the inlet side of the gas cooler 41 arranged in a manner adjacent to the exchanger 22. The heat dissipation path 40 is for supplying the gas cooler 41 with the refrigerant condensed in at least one of the internal heat exchanger 24b and the left internal heat exchanger 24c. In the gas cooler 41 to which the refrigerant is supplied through the heat radiation path 40, heat exchange is performed between the refrigerant and the ambient air, and the refrigerant radiates heat. That is, the heat radiation path 40 introduces the refrigerant condensed in the internal heat exchanger 24 and supplies the refrigerant to the gas cooler 41, and the gas cooler 41 exchanges heat with ambient air to dissipate heat.

  The third junction from the branch point of the refrigerant pipe 25 connected to the outlet side of the heat exchanger 24b and the left heat exchanger 24c in the middle of the heat radiation pipe 42 constituting the heat radiation path 40. On the way to P4, check valves 431 and 432 are provided, respectively.

  The return path 50 is connected to the outlet side of the gas cooler 41 and is connected to the refrigerant pipe 25 constituting the main circuit 20, that is, the fourth junction P 5 of the refrigerant pipe 25 between the first capillary tube 23 and the distributor 27. It is the path | route comprised by the return piping 51 to do.

  A second capillary tube 52 is provided in the middle of the return pipe 51 constituting the return path 50. The second capillary tube 52 is for adiabatic expansion by reducing the pressure of the refrigerant passing therethrough.

  The refrigerant circuit device having such a configuration cools or heats the product stored in the product storage 3 as follows.

  First, the case where CCC operation (operation which cools the internal air of all the goods storage 3) is performed is explained. In this case, the branch solenoid valves 321 and 322 are closed, and the high-pressure side solenoid valve 261, the low-pressure side solenoid valves 262, 263, and 264 and the feedback solenoid valves 265 and 266 are opened. As a result, the refrigerant compressed by the compressor 21 circulates as shown in FIG.

  That is, the refrigerant compressed by the compressor 21 passes through the high-pressure side electromagnetic valve 261 to be opened and reaches the external heat exchanger 22. The refrigerant that has reached the external heat exchanger 22 dissipates heat to the surrounding air (outside air) and condenses while passing through the external heat exchanger 22. The refrigerant condensed in the external heat exchanger 22 is adiabatically expanded in the first capillary tube 23.

  The refrigerant adiabatically expanded and vaporized by the first capillary tube 23 is branched into three by the distributor 27, and reaches the right internal heat exchanger 24a, the central internal heat exchanger 24b, and the left internal heat exchanger 24c. Then, each of the internal heat exchangers 24 evaporates and takes heat from the internal air of the product storage 3 to cool the internal air. The cooled internal air circulates in the interior by driving each internal blower fan, whereby the products stored in each product storage 3 are cooled to the circulating internal air. The refrigerant evaporated in each internal heat exchanger 24 is gas-liquid separated by the accumulator 28, and then the gas phase portion is sucked into the compressor 21 and compressed by the compressor 21 to repeat the above-described circulation.

  Next, the case where the HHC operation (the operation of heating the internal air of the middle warehouse 3b and the left warehouse 3c and cooling the internal air of the right warehouse 3a) is described. In this case, the high pressure side solenoid valve 261, the low pressure side solenoid valves 263, 264, and the feedback solenoid valves 265, 266 are closed, and the branch solenoid valves 321, 322 and the low pressure side solenoid valve 262 are opened. As a result, the refrigerant compressed by the compressor 21 circulates as shown in FIG.

  That is, the refrigerant compressed by the compressor 21 passes through the branch path 30 and reaches the internal heat exchanger 24b and the left internal heat exchanger 24c. The refrigerant that has reached the internal heat exchanger 24b and the left internal heat exchanger 24c exchanges heat with the internal air of the intermediate 3b and the left internal 3c while passing through the heat exchanger. It dissipates heat and condenses. Thereby, the internal air of the inner warehouse 3b and the left warehouse 3c is heated. The heated internal air circulates in each of the inner warehouse 3b and the left warehouse 3c by driving an internal blower fan (not shown), whereby each product storage 3 (the middle warehouse 3b and the left warehouse 3c) is circulated. The accommodated goods are heated to the circulating internal air.

  The refrigerant condensed in the internal heat exchanger 24b and the left internal heat exchanger 24c passes through the heat radiation pipe 42 constituting the heat radiation path 40 to reach the gas cooler 41 and radiates heat to the surrounding air by the gas cooler 41. The refrigerant radiated by the gas cooler 41 is adiabatically expanded in the second capillary tube 52.

  The refrigerant vaporized by adiabatic expansion in the second capillary tube 52 passes through the low pressure side electromagnetic valve 262 opened via the distributor 27 and reaches the right internal heat exchanger 24a, and this right internal heat exchanger. It evaporates at 24a and takes heat from the internal air of the right case 3a to cool the internal air. The cooled internal air circulates in the right case 3a by driving the right internal blower fan F2 (see FIG. 2), thereby cooling the product accommodated in the right case 3a. After the refrigerant evaporated in the right-side heat exchanger 24a is gas-liquid separated by the accumulator 28, the gas phase portion is sucked into the compressor 21 and compressed by the compressor 21, and the above-described circulation is repeated. Thus, the refrigerant circuit 10 has a function as a heat pump.

  FIG. 6 is an explanatory view showing the configuration of the refrigerant circuit, and FIG. 7 is an enlarged perspective view showing a main part of the refrigerant circuit shown in FIG.

  As shown in FIGS. 6 and 7, in the refrigerant circuit 10 described above, the compressor 21 starts from the region where the refrigerant passes in a low pressure state, that is, the first capillary tube 23 and the second capillary tube 52 which are expansion mechanisms. Solenoid valves (low pressure side solenoid valves 262, 263, 264 and feedback solenoid valves 265, 266) disposed in a low pressure region that reaches the suction port of the gas are accommodated in a manner surrounded by a heat insulating casing 60. Yes. This will be described in more detail as follows.

  FIGS. 8 and 9 show the heat insulating housings shown in FIGS. 6 and 7, respectively. FIG. 8 is an exploded perspective view, and FIG. 9 is a perspective view. First, the low pressure side solenoid valves 262, 263, 264 and the feedback solenoid valves 265, 266 are disposed at substantially the same height level, and the valve bodies 2621, 2631, 2641, 2651, 2661 and couplers 2622, 2632 are disposed. , 2642, 2652, and 2662. The valve main bodies 2621, 2631, 2641, 2651, and 2661 are parts connected to the refrigerant pipe 25, and plungers 2623, 2633, 2643, 2653, and 2663 are arranged therein so as to be movable up and down. The couplers 2622, 2632, 2642, 2652, and 2662 have solenoid valve coils housed therein, and are provided with different colors. Specifically, red, yellow, and white are applied to components that constitute the low pressure side solenoid valves 262, 263, and 264, and black and blue are applied to components that configure the return solenoid valves 265 and 266. ing. Such low-pressure side solenoid valves 262, 263, 264 and feedback solenoid valves 265, 266 are opened when the plungers 2623, 2633, 2643, 2653, 2663 are moved up and down as needed by the solenoid valve coils. Or it becomes a closed state and accepts or regulates passage of a refrigerant.

  Next, the heat insulating housing 60 is formed by a heat insulating material such as polystyrene foam, and is configured by combining the housing lower portion 61 with the housing upper portion 62, and the low pressure side solenoid valves 262, 263, 264, and The return solenoid valves 265 and 266 are connected to the respective valve bodies 2621, 2631, 2641, 2651, and 266, and the low pressure side solenoid valves 262, 263, and 264 and the upstream side and the downstream side of the return solenoid valves 265 and 266. The refrigerant pipe 25 has a size capable of accommodating a part thereof. The housing lower portion 61 constitutes a bottom portion inside the heat insulating housing 60.

  The housing upper part 62 constitutes a lid portion of the heat insulating housing 60, and the valve main bodies 2621, 263, 264, 2651, respectively, of the low pressure side solenoid valves 262, 263, 264 and the return solenoid valves 265, 266. Through holes 63 through which plungers 2623, 2633, 2643, 2653, and 2663 disposed inside the 2661 are inserted are arranged in a straight line.

  On the upper surface of the housing upper part 62, the colors of the couplers 2622, 2632, 2642, 2652, and 2662 to be individually connected to the respective solenoid valves are printed. In other words, “R” is printed corresponding to the through hole 63 through which the plunger 2623 to which the red coupler 2622 is to be connected is inserted, and the through hole 63 through which the plunger 2633 to be connected with the yellow coupler 2632 is inserted. Correspondingly, “Y” is printed, and “W” is printed corresponding to the through hole 63 through which the plunger 2643 to which the white coupler 2642 is to be connected is inserted, and the black coupler 2652 is connected. “Bk” is printed in correspondence with the through hole 63 through which the plunger 2653 is inserted, and “B” is printed in correspondence with the through hole 63 through which the plunger 2663 to which the blue coupler 2662 is to be connected is inserted. Has been.

  Then, the respective couplers 2622, 2632, 2642, 2652, 2662 are fastened to the corresponding plungers 2623, 2633, 2643, 2653, 2663 by screw members 64, whereby the low-pressure side solenoid valves 262, 263, 264 and the feedback solenoid valves. 265 and 266 are configured. Reference numeral 65 in FIGS. 8 and 9 denotes a lead wire.

  In the heat insulating casing 60, a sheet body 66 having one end extending into the heat insulating casing 60 and the other end exposed to the outside is disposed between the casing lower portion 61 and the casing upper portion 62. It is. The sheet body 66 is, for example, a non-woven fabric or the like, and sucks condensed water generated inside the heat insulating housing 60 by capillary action and evaporates it at a portion exposed to the outside.

  Further, as shown in FIG. 7, on the rear side of the external blower fan F <b> 1, that is, on the compressor 21 side, a sheet body that exposes a part of the wind sent by the external blower fan F <b> 1 to the outside of the heat insulating casing 60. A wind direction plate (wind direction member) 70 to be directed to 66 is disposed.

  In the refrigerant circuit device having the above-described configuration, the heat insulating casing 60 includes the valve main bodies 2621, 2631, 2641, 2651, 2661 of the low pressure side electromagnetic valves 262, 263, 264 and the feedback electromagnetic valves 265, 266, respectively. Since they are housed inside in such a manner that they are enclosed together with a part of the refrigerant pipe 25 connected to the upstream side and the downstream side of these solenoid valves, the heat insulation of these solenoid valves can be improved. Therefore, it is possible to reduce the amount of frost formed on each valve body 2621, 2631, 2641, 2651, 2661 of these solenoid valves, and to prevent insulation deterioration of the solenoid valves.

  According to the refrigerant circuit device, the upper surface of the heat insulating housing 60, that is, the housing upper portion 62, is printed with colors for each of the couplers 2622, 2632, 2642, 2652, and 2662. Therefore, the couplers 2622, 2632, 2642, 2652, and 2662 can be prevented from being attached incorrectly.

  Further, according to the refrigerant circuit device, the sheet body 66 arranged in a manner that a part of the refrigerant circuit device is exposed to the outside of the heat insulating casing 60 sucks the condensed water generated inside the heat insulating casing 60 by capillary action. Since it is evaporated at a portion exposed to the outside, it is possible to suppress the excessive accumulation of condensed water inside the heat insulating casing 60, and this can also prevent insulation deterioration of the electromagnetic valve.

  Furthermore, according to the refrigerant circuit device, the wind direction plate 70 directs a part of the wind sent out by the outside fan F1 to the sheet body 66 exposed to the outside of the heat insulating casing 60. Evaporation at 66 can be promoted.

  As described above, the refrigerant circuit device according to the present invention is useful for preventing insulation deterioration of an electromagnetic valve disposed in a low pressure region in the refrigerant circuit, and is particularly suitable for a vending machine.

DESCRIPTION OF SYMBOLS 10 Refrigerant circuit 20 Main circuit 21 Compressor 22 External heat exchanger 23 1st capillary tube 24 Internal heat exchanger 25 Refrigerant piping 262,263,264 Low pressure side solenoid valve 265,266 Return solenoid valve 2621,2631,2641 , 2651, 2661 Valve body 2622, 2632, 2642, 2652, 2661 Coupler 2623, 2633, 2643, 2653, 2663 Plunger 30 Branch path 31 Branch pipe 40 Heat radiation path 41 Gas cooler 42 Heat radiation pipe 50 Return path 51 Return pipe 52 Second capillary Tube 60 Heat insulation housing 61 Housing lower portion 62 Housing upper portion 66 Sheet body 70 Wind direction plate F1 Outside fan

Claims (5)

An internal heat exchanger that evaporates the supplied refrigerant and cools the internal atmosphere of the chamber in which the refrigerant is disposed;
A compressor that sucks and compresses the refrigerant evaporated in each internal heat exchanger;
An external heat exchanger for condensing the refrigerant compressed by the compressor;
In a refrigerant circuit device comprising a refrigerant circuit configured by sequentially connecting an expansion mechanism that adiabatically expands the refrigerant condensed in the external heat exchanger with a refrigerant pipe,
The valve body of the solenoid valve disposed in the low pressure region where the refrigerant is in a low pressure state in the refrigerant circuit is enclosed inside with a part of the refrigerant pipe connected to the upstream side and the downstream side of the solenoid valve. A refrigerant circuit device comprising a housing having a heat insulating structure to be accommodated.   The casing is disposed on the upstream side of each of the internal heat exchangers, and houses a valve body of a low-pressure side solenoid valve that restricts or allows passage of the refrigerant adiabatically expanded by the expansion mechanism. The refrigerant circuit device according to claim 1.   The refrigerant according to claim 1 or 2, wherein the casing is printed on the surface with a color for each coupler constituting the solenoid valve together with each valve body. Circuit device.   A sheet body is provided in a manner in which a part thereof is exposed to the outside of the housing, and the condensed water generated inside the housing is sucked by capillary action and evaporated to a portion exposed to the outside. The refrigerant circuit device according to any one of claims 1 to 3.   5. The refrigerant circuit device according to claim 4, further comprising a wind direction member that directs at least a part of the wind sent by the blowing unit toward the sheet body exposed to the outside of the casing.

Images