JP5747567B2 - Refrigerant circuit device - Google Patents

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, the following is known as a refrigerant circuit device applied to a vending machine or the like. That is, a refrigerant circuit having a main path, a high-pressure refrigerant introduction path, a heat radiation path, and a return path is provided.

  The main path is configured in an annular shape by sequentially connecting the internal heat exchanger, the compressor, the external heat exchanger, and the expansion mechanism through the refrigerant pipe. The in-compartment heat exchanger is disposed inside each commodity storage in the vending machine main body. The compressor is inside the main body of the vending machine, but is disposed in the machine room outside the commodity storage. The compressor sucks the refrigerant that has passed through the internal heat exchanger and compresses the sucked refrigerant. It is discharged in a high temperature and high pressure state. The external heat exchanger is disposed in the machine room like the compressor, and introduces and condenses the refrigerant compressed by the compressor. The expansion mechanism is disposed in the machine room in the same manner as the compressor and the external heat exchanger, and decompresses the refrigerant condensed in the external heat exchanger to adiabatically expand.

  In such a main path, the refrigerant compressed by the compressor is condensed by the external heat exchanger, and the condensed refrigerant is adiabatically expanded by the expansion mechanism and evaporated by the internal heat exchanger. The refrigerant evaporated in the internal heat exchanger is sucked by the compressor, compressed again, and circulated. As a result, the internal air of the commodity storage in which the internal heat exchanger is disposed is cooled.

  The high-pressure refrigerant introduction path introduces the refrigerant compressed by the compressor and supplies it to the internal heat exchanger that constitutes the main path, which is provided in the product storage that is to be heated. The refrigerant is condensed in the exchanger. As a result, the internal air of the commodity storage in which the internal heat exchanger is disposed is heated.

  The heat dissipation path introduces the refrigerant condensed in the internal heat exchanger of the product storage to be heated and supplies it to the heating side heat exchanger arranged in a mode adjacent to the external heat exchanger. It is. As a result, in the heating side heat exchanger, the refrigerant passing therethrough exchanges heat with the surrounding air to radiate heat.

  The return path introduces the refrigerant radiated by the heating side heat exchanger and returns it to the upstream side of the expansion mechanism in the main path. As a result, the refrigerant that has passed through the return path reaches the main path, and then passes through the expansion mechanism and is sent to a predetermined internal heat exchanger.

  In the refrigerant circuit device having such a configuration, low-temperature, low-pressure refrigerant passes through the path from the expansion mechanism to the compressor in the refrigerant circuit, and condensation forms on the surface of the refrigerant piping that constitutes the path. It has been known. Therefore, there is known a refrigerant circuit device that includes a tray that stores condensed water below a low-pressure portion corresponding to the path in the machine room, and that condensate water stored in the tray is guided to the evaporation tray to evaporate. (For example, refer to Patent Document 1).

JP 2008-305384 A

  By the way, in the refrigerant circuit apparatus proposed in Patent Document 1 described above, the condensed water guided to the evaporating dish is evaporated so that the air that has passed around the outside heat exchanger passes through the vicinity of the evaporating dish. However, it was possible for the air to pass through the vicinity of the low-pressure portion. Here, the air that has passed around the outside heat exchanger has a higher temperature than the outside air because the refrigerant that passes through the outside heat exchanger condenses or the refrigerant that passes through the heating side heat exchanger dissipates heat. . Therefore, when such air passes in the vicinity of the low-pressure part, the refrigerant flowing through the low-pressure part, particularly the refrigerant flowing from the expansion mechanism toward the internal heat exchanger, is heated, and as a result, in the internal heat exchanger There was a problem that caused a reduction in cooling capacity.

  In view of the above circumstances, an object of the present invention is to provide a refrigerant circuit device that favorably evaporates condensed water and suppresses a reduction in the cooling capacity of the internal heat exchanger.

In order to achieve the above object, the refrigerant circuit device according to claim 1 of the present invention is configured to exchange heat between the refrigerant passing through its own flow path and the internal air of the target chamber in which the refrigerant is disposed. A heat exchanger, a compressor disposed in the machine room outside the target chamber and sucking and compressing the refrigerant that has passed through the internal heat exchanger, the compressor disposed in the machine room, and all An external heat exchanger for exchanging heat between the refrigerant compressed by the compressor and ambient air when cooling the internal air of the target chamber; and the external heat exchanger disposed in the machine room A refrigerant circuit device comprising a refrigerant circuit in which a refrigerant pipe is connected to an expansion mechanism that adiabatically expands the refrigerant that has passed through the refrigerant and sends the refrigerant to a predetermined internal heat exchanger, and the expansion of the refrigerant circuit in the machine chamber Arranged in the lower area of the low-pressure part corresponding to the path from the mechanism to the compressor And a condensate member that stores the condensed water generated in the low-pressure portion, and a water-absorbing material that can absorb the condensed water stored in the saucer member by capillary action, and passes around the outside heat exchanger. The evaporating sheet body standing on the tray member is provided so that the air that has passed through itself reaches the low-pressure portion.

  The refrigerant circuit device according to claim 2 of the present invention is the refrigerant circuit device according to claim 1, wherein the evaporative sheet body includes a sending means for allowing outside air to pass around the outside heat exchanger and the low pressure portion. It is characterized by standing between them.

  The refrigerant circuit device according to claim 3 of the present invention is the refrigerant circuit device according to claim 1 or 2, wherein the external heat exchanger cools the internal air of a part of the target chambers. Heat exchange is performed between the refrigerant supplied from the inner heat exchanger disposed in the target chamber to be heated and the ambient air.

  According to the refrigerant circuit device of the present invention, the tray member is disposed in the lower region of the low pressure portion corresponding to the path from the expansion mechanism of the refrigerant circuit to the compressor in the machine room, and the condensed water generated in the low pressure portion The evaporative sheet body is made of a water-absorbing material that can absorb condensed water stored in the tray member by capillary action, and the air that has passed around the external heat exchanger passes through itself to the low-pressure part. Since it is erected on the tray member so as to reach, the condensed water generated in the low pressure region can be collected well, and the collected condensed water can be evaporated by the evaporating sheet body. Moreover, since the air that has passed around the outside heat exchanger reaches the low pressure part after passing through the evaporating sheet body, it is sufficiently low in temperature when the air passes around the low pressure part, The refrigerant passing through the low pressure part is not heated more than necessary. Therefore, it is possible to effectively evaporate the condensed water and to suppress the reduction of the cooling capacity of the internal heat exchanger.

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 applied to the vending machine shown in FIGS. 1 and 2. FIG. 4 is a perspective view showing a connection state of main components of the refrigerant circuit shown in FIG. 3 as viewed from the upper right side. FIG. 5 is a perspective view showing a connection state of main components of the refrigerant circuit shown in FIG. 3 as viewed from the upper left side. FIG. 6 is a side view showing the connection state shown in FIG. 5 when viewed from the left. FIG. 7 is a perspective view illustrating the tray member and the evaporation sheet illustrated in FIGS. 5 and 6. FIG. 8 is a perspective view showing a case where the external heat exchanger shown in FIG. 3 is viewed from the upper left side. FIG. 9 is a side view showing a case where the external heat exchanger shown in FIG. 3 is viewed from the left side. FIG. 10 is an explanatory diagram showing the flow of the refrigerant when the CCC operation is performed. FIG. 11 is an explanatory diagram showing a refrigerant flow in the external heat exchanger when the CCC operation shown in FIG. 10 is performed. FIG. 12 is an explanatory diagram showing the flow of the refrigerant when performing the HCC operation. FIG. 13 is an explanatory diagram showing the flow of the refrigerant in the external heat exchanger when the HCC operation shown in FIG. 12 is performed. FIG. 14 is an explanatory diagram showing a case where the main part of the vending machine shown in FIG. 1 is viewed from the front.

  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 storages (target chambers) 3 that are 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 product storage case 3. 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 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.

  FIG. 3 is a conceptual diagram conceptually showing the refrigerant circuit device applied to the vending machine shown in FIGS. 1 and 2. The refrigerant circuit device illustrated here includes a refrigerant circuit 10 including a main path 20, a high-pressure refrigerant introduction pipe 31, and a heat radiation pipe 32. A predetermined amount of refrigerant is sealed inside the refrigerant circuit 10.

  The main path 20 is configured by sequentially connecting a compressor 21, an external heat exchanger 22, an expansion mechanism 23, and an internal heat exchanger 24 through a refrigerant pipe 25.

  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. When the refrigerant compressed by the compressor 21 passes through its own flow path, the external heat exchanger 22 performs heat exchange with ambient air to condense the refrigerant. The configuration of the external heat exchanger 22 will be described later. A three-way valve 26 is provided in the refrigerant pipe 25 that connects the external heat exchanger 22 and the compressor 21. The three-way valve 26 will be described later.

  The expansion mechanism 23 is, for example, a capillary tube, and is disposed in the machine room 9 similarly to the compressor 21 and the external heat exchanger 22 as shown in FIG. The expansion mechanism 23 decompresses the refrigerant that has passed through the external heat exchanger 22 and adiabatically expands the refrigerant.

  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 piping 25 connecting the internal heat exchanger 24 and the external heat exchanger 22 is branched into three by a distributor 27 disposed in the middle thereof, and the internal space disposed in the right warehouse 3a. Heat exchanger 24 (hereinafter also referred to as right internal heat exchanger 24a), internal heat exchanger 24 (hereinafter also referred to as internal heat exchanger 24b) disposed in the central warehouse 3b, and left warehouse 3c Are connected to the internal heat exchanger 24 (hereinafter also referred to as the left internal heat exchanger 24c) in a manner communicating with each low-pressure refrigerant inlet 241.

  Further, in the refrigerant pipe 25, the low pressure side solenoid valves 281 and 282, on the way from the distributor 27 to the right internal heat exchanger 24a, the central internal heat exchanger 24b, and the left internal heat exchanger 24c, respectively. 283 is provided. The low pressure side solenoid valves 281, 282, and 283 are valve bodies that can be opened and closed. When an open command is given from a control means (not shown), the low pressure side solenoid valves 281, 282, and 283 are opened and allowed to pass through the refrigerant while being closed. If it is closed, the passage of the refrigerant is restricted.

  The internal heat exchanger 24 is provided with a low-pressure refrigerant channel 245 (see FIG. 4). The low-pressure refrigerant flow path 245 is a meander-shaped refrigerant flow path, and flows in through the low-pressure refrigerant inlet 241 and flows out from the low-pressure refrigerant outlet 242 through the refrigerant (low-pressure refrigerant). In these internal heat exchangers 24, heat exchange is performed between the refrigerant passing through the low-pressure refrigerant flow path 245 and the internal air of the product storage 3 in which the refrigerant is disposed, and the low-pressure refrigerant flow The refrigerant passing through the passage 245 evaporates to cool the internal air of the commodity storage 3. Refrigerant pipes 25 are connected to the outlet sides of these internal heat exchangers 24 in a manner communicating with the respective low-pressure refrigerant outlets 242, and the refrigerant pipes 25 join at the midway junction P <b> 1 to the compressor 21. Connected.

  In such a main path 20, reference numeral 29 in FIG. 3 is an internal heat exchanger. The internal heat exchanger 29 exchanges heat between the high-pressure refrigerant and the low-pressure refrigerant.

  The high-pressure refrigerant introduction pipe 31 is connected to the three-way valve 26 and is connected to the left-side internal heat exchanger 24c in a manner communicating with the high-pressure refrigerant inlet 243. The high-pressure refrigerant introduction pipe 31 introduces refrigerant (high-pressure refrigerant) compressed by the compressor 21.

  Here, the three-way valve 26 has a first sending state in which the refrigerant compressed by the compressor 21 is sent to the external heat exchanger 22 and a second sending state in which the refrigerant compressed by the compressor 21 is sent to the high-pressure refrigerant introduction pipe 31. Valve means that can be switched alternatively between. The switching operation of the three-way valve 26 is performed according to a command given from the control means.

  In addition, the left-inside heat exchanger 24c is provided with a high-pressure refrigerant channel 246 (see FIG. 4) in addition to the low-pressure refrigerant channel 245. The high-pressure refrigerant flow path 246 is a meander-shaped refrigerant flow path, and flows in through the high-pressure refrigerant inlet 243 and flows out from the high-pressure refrigerant outlet 244 through the refrigerant (high-pressure refrigerant). The left internal heat exchanger 24c performs heat exchange between the refrigerant passing through the high pressure refrigerant flow path 246 and the internal air of the left storage 3c, and the refrigerant passing through the high pressure refrigerant flow path 246 is exchanged. By condensing, the internal air of the left warehouse 3c is heated.

  One end of the heat radiation pipe 32 is connected to the outlet side of the left-side internal heat exchanger 24 c in a manner communicating with the high-pressure refrigerant outlet 244, and the other end is connected to the external heat exchanger 22. The heat radiation pipe 32 is for supplying the refrigerant condensed in the left-side heat exchanger 24c to the external heat exchanger 22.

  In addition, the code | symbol H, F1, and F2 in a figure are a heater, an internal fan, and an external fan, respectively. The heater H is a heating unit that is disposed in the middle store 3b and the left store 3c and that heats the internal air of the product storage 3 in which the heater H is disposed by being driven and energized. The internal blower fan F <b> 1 is disposed in each commodity storage 3, and circulates the air that has passed around the internal heat exchanger 24 by driving inside the commodity storage 3. The outside blower fan F2 is disposed on the rear side of the outside heat exchanger 22 and is driven to allow outside air to pass around the outside blower fan F2 and to send the passed outside air backward. It is a sending means.

  FIG. 4 is a perspective view showing a connection state of main components of the refrigerant circuit 10 shown in FIG. 3 as viewed from the upper right side. As shown in FIG. 4, the right internal heat exchanger 24a and the internal internal heat exchanger 24b are provided with a low-pressure refrigerant inlet 241 and a low-pressure refrigerant outlet 242 on the left side, and the left internal heat exchanger 24c The low-pressure refrigerant inlet 241, the low-pressure refrigerant outlet 242, the high-pressure refrigerant inlet 243, and the high-pressure refrigerant outlet 244 are provided on the right side.

  In other words, in the refrigerant circuit device according to the present embodiment, the internal heat exchanger 24 (the right internal heat exchanger 24a and the right internal heat exchanger 24a and The left internal heat exchanger 24c) is provided with a refrigerant inlet 241 (243) and a refrigerant outlet 242 (244) on the inner side of the left and right sides. More specifically, the right internal heat exchanger 24a disposed in the right warehouse 3a is provided with a low-pressure refrigerant inlet 241 and a low-pressure refrigerant outlet 242 on the left side which is the inner side of the left and right sides. The left internal heat exchanger 24c disposed in the storage 3c has a low-pressure refrigerant inlet 241, a low-pressure refrigerant outlet 242, a high-pressure refrigerant inlet 243, and a high-pressure refrigerant outlet 244 provided on the right side which is the inner side of the left and right sides. is there.

  Note that reference numeral RP in FIG. 4 is a lead pipe. The lead pipe RP bundles the refrigerant pipe 25, the high-pressure refrigerant introduction pipe 31, and the heat radiation pipe 32 in a predetermined combination.

  FIG. 5 is a perspective view showing a connection state of main components of the refrigerant circuit 10 shown in FIG. 3 as viewed from the upper left side, and FIG. 6 is a view of the connection state shown in FIG. 5 from the left side. It is a side view which shows a case. As shown in FIGS. 5 and 6, a tray member 41 and an evaporation sheet 42 are disposed in the machine room 9. As shown in FIG. 7, the tray member 41 is a dish-shaped member formed of, for example, a resin material. The tray member 41 is disposed in a lower region of the low pressure pipe 33 of the refrigerant circuit 10 in the machine room 9, that is, a lower region of a low pressure portion corresponding to a path from the expansion mechanism 23 to the compressor 21. The tray member 41 stores the dew condensation water that is generated and dropped on the surface of the low-pressure pipe 33.

  The evaporating sheet 42 is a sheet body made of a water-absorbing material capable of absorbing moisture by capillary action. As shown in FIG. 7, the evaporation sheet 42 has an appropriately bent shape, and has a base portion 421 disposed on the bottom surface of the tray member 41, and extends upward from an end portion of the base portion 421. It has the upper extension part 422 which exists, and is standingly arranged in the saucer member 41. FIG. The upper extension 422 of the evaporation sheet 42 is located behind the outside blower fan F <b> 2 in the machine room 9 and ahead of the low-pressure pipe 33. The upper extension 422 has a size sufficient for all of the air (outside air) that has passed around the outside heat exchanger 22 by the drive of the external fan B2 to pass through the upper extension 422. Yes. That is, the evaporating sheet 42 is erected on the tray member 41 so that the air that has passed around the outside heat exchanger 22 passes through itself and reaches the low-pressure pipe 33.

  8 and 9 respectively show the external heat exchanger 22 shown in FIG. 3, and FIG. 8 is a perspective view showing the external heat exchanger 22 as viewed from the upper left side. These are side views which show the case where the external heat exchanger 22 is seen from the left. As shown in FIGS. 8 and 9, the external heat exchanger 22 includes a first refrigerant channel 22 a and a second refrigerant channel 22 b.

  The first refrigerant flow path 22a is formed in a meandering shape, and the refrigerant flows in through the first refrigerant inlet 22a1 and flows out through the refrigerant outlet 22a2. Here, a refrigerant pipe 25 connected to the three-way valve 26 is connected to the part 221 having the first refrigerant inlet 22a1, and the expansion mechanism 23 (internal heat exchanger 29) is connected to the part 222 having the refrigerant outlet 22a2. ) Is connected to the refrigerant piping 25. That is, the first refrigerant flow path 22a flows in the refrigerant compressed by the compressor 21 through the first refrigerant inlet 22a1 and flows out the refrigerant that has passed through the refrigerant outlet 22a2 toward the expansion mechanism 23.

  The 2nd refrigerant flow path 22b is provided in the aspect which merges in the middle of the 1st refrigerant flow path 22a. The second refrigerant flow path 22b allows the refrigerant to flow into the first refrigerant flow path 22a through the second refrigerant inlet 22b1 and to pass through the refrigerant through the junction P2. Here, the heat radiation pipe 32 is connected to the part 223 having the second refrigerant inlet 22b1. That is, the second refrigerant flow path 22b flows the refrigerant supplied from the left-side heat exchanger 24c through the second refrigerant inlet 22b1 and passes the refrigerant that has passed through the junction P2 to the first refrigerant flow path 22a. To flow out of the refrigerant outlet 22a2.

  When the refrigerant passes through the first refrigerant flow path 22a, the external heat exchanger 22 including the first refrigerant flow path 22a and the second refrigerant flow path 22b exchanges heat between the refrigerant and the ambient air. On the other hand, when the refrigerant passes through the second refrigerant flow path 22b, heat is exchanged between the refrigerant and ambient air, and the refrigerant is dissipated.

  The refrigerant circuit device having the above-described 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 control means places the three-way valve 26 in the first delivery state and gives an open command to the low pressure side solenoid valves 281, 282, 283. As a result, the refrigerant compressed by the compressor 21 circulates as shown in FIG.

  That is, the refrigerant compressed by the compressor 21 reaches the first refrigerant inlet 22a1 of the external heat exchanger 22 via the three-way valve 26 in the first delivery state. The refrigerant that has reached the first refrigerant inlet 22a1 passes through the first refrigerant flow path 22a as shown in FIG. 11 (see the arrow in FIG. 11). While passing through the first refrigerant flow path 22a, heat exchange with ambient air (outside air) is performed to condense. The refrigerant condensed while passing through the first refrigerant flow path 22a flows out through the refrigerant outlet 22a2, passes through the internal heat exchanger 29, and then adiabatically expands by the expansion mechanism 23. The refrigerant adiabatically expanded by the expansion mechanism 23 is branched into three by the distributor 27, and is supplied to the low-pressure refrigerant inlets 241 of the right internal heat exchanger 24a, the central internal heat exchanger 24b, and the left internal heat exchanger 24c. It reaches. The refrigerant that has reached each low-pressure refrigerant inlet 241 evaporates while passing through the low-pressure refrigerant flow path 245 of each internal heat exchanger 24, takes heat from the internal air of the product storage 3, and cools the internal air. The cooled internal air circulates in the interior by driving each internal blower fan F1, whereby the products stored in each product storage 3 are cooled to the circulating internal air. The refrigerant evaporated while passing through the low-pressure refrigerant flow path 245 of each internal heat exchanger 24 flows out from each low-pressure refrigerant outlet 242, passes through the refrigerant pipe 25, joins at the junction P <b> 1, and then the internal heat exchanger. The air is sucked into the compressor 21 through 29 and compressed by the compressor 21 to repeat the above-described circulation.

  Next, the case where the HCC operation (operation for heating the internal air of the left warehouse 3c and cooling the internal air of the right warehouse 3a and the middle warehouse 3b) is described. In this case, the control means places the three-way valve 26 in the second delivery state, gives a close command to the low pressure side solenoid valve 283, and gives an open command to the low pressure side solenoid valves 281 and 282. 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 refrigerant introduction pipe 31 via the three-way valve 26 in the second delivery state, and reaches the high-pressure refrigerant inlet 243 of the left internal heat exchanger 24c. The refrigerant reaching the high-pressure refrigerant inlet 243 exchanges heat with the internal air of the left chamber 3c while passing through the high-pressure refrigerant flow path 246 of the left chamber heat exchanger 24c, and dissipates heat to the internal air and condenses. Thereby, the internal air of the left warehouse 3c is heated. The heated internal air circulates inside the left warehouse 3c by driving the internal blower fan F1, whereby the product stored in the left warehouse 3c is heated to the circulating internal air.

  The refrigerant condensed while passing through the high-pressure refrigerant flow path 246 of the left internal heat exchanger 24c flows out from the high-pressure refrigerant outlet 244, passes through the heat radiation pipe 32, and enters the second refrigerant inlet 22b1 of the external heat exchanger 22. It reaches. As shown in FIG. 13, the refrigerant that has reached the second refrigerant inlet 22b1 passes through the second refrigerant flow path 22b, and then enters the first refrigerant flow path 22a from the junction P2 and passes therethrough (arrow in FIG. 13). reference). While passing through the first refrigerant flow path 22a, heat is exchanged with ambient air (outside air) to dissipate heat. The refrigerant that has dissipated heat while passing through the first refrigerant flow path 22 a flows out through the refrigerant outlet 22 a 2, passes through the internal heat exchanger 29, and then adiabatically expands by the expansion mechanism 23. The refrigerant adiabatically expanded by the expansion mechanism 23 is branched into two by the distributor 27 and reaches the low-pressure refrigerant inlets 241 of the right internal heat exchanger 24a and the internal internal heat exchanger 24b. The refrigerant that reaches each low-pressure refrigerant inlet 241 evaporates while passing through the low-pressure refrigerant flow path 245 of the right-side internal heat exchanger 24a and the internal-internal heat exchanger 24b, and from the internal air of the right-side 3a and the internal 3b. Heat is taken away and the internal air is cooled. The cooled internal air circulates in the interior by driving each internal blower fan F1, whereby the products accommodated in the right warehouse 3a and the central warehouse 3b are cooled to the circulating internal air. The refrigerant evaporated while passing through the low pressure refrigerant flow path 245 of the right internal heat exchanger 24a and the internal internal heat exchanger 24b flows out from the respective low pressure refrigerant outlets 242 and passes through the refrigerant pipe 25, at the junction P1. After joining, the air is sucked into the compressor 21 through the internal heat exchanger 29 and compressed by the compressor 21 to repeat the above-described circulation.

  In the refrigerant circuit device according to the present embodiment as described above, the in-compartment heat exchanger 24 (the right in-house heat exchanger) disposed in the commodity storage 3 (right warehouse 3a and left warehouse 3c) at both ends. 24a and the left-side heat exchanger 24c) are provided with a refrigerant inlet 241 (243) and a refrigerant outlet 242 (244) on the inner side of the left and right sides, so that the bottom surface of the product storage box as in the prior art It is not necessary to fold the refrigerant pipes to the left and right, and a protective material for protecting the refrigerant pipes 25 is not required.

  Therefore, according to the refrigerant circuit device according to the present embodiment, no protective material is required, so that the cost can be reduced by reducing the number of parts.

  In addition, the left and right side portions of the internal heat exchanger 24 (the right internal heat exchanger 24a and the left internal heat exchanger 24c) disposed in the commodity storage 3 (right storage 3a and left storage 3c) at both ends. Of these, the refrigerant inlet 241 (243) and the refrigerant outlet 242 (244) are provided on the inner side, whereby a space S can be formed in the lower region of the metal receiver 50 as shown in FIG. Here, the money receiver 50 is provided in the carry-out shooter 8 of the commodity storage 3 (right warehouse 3a and left warehouse 3c) at both ends. This money receiver 50 is for bringing the product toward the center side because the product outlet 4 a is provided at the lower part of the central region of the outer door 4. Since the space S can be formed in the lower region of the metal receiver 50 in this way, the internal air sent out by driving the internal blower fan F1 can flow forward through the space S, and the internal air Can be circulated satisfactorily. By properly circulating the internal air, it is possible to shorten the time for which the product is brought to a desired temperature state, and to suppress the occurrence of product temperature variations in each product storage 3. Furthermore, the refrigerant pipe 25 (the high pressure refrigerant introduction pipe 31, the heat radiating pipe 32) is the outer wall surface of the product storage 3 (right warehouse 3a and left warehouse 3c) on both ends. If there is, it is not necessary to arrange on the left wall surface, so that heat leakage can be suppressed. Furthermore, since the piping configuration can be gathered closer to the center, the apparatus can be easily removed in maintenance work or the like.

  In the refrigerant circuit device, the tray member 41 is disposed in a lower region of the low-pressure pipe 33 of the refrigerant circuit 10 in the machine room 9 to store the condensed water generated in the low-pressure pipe 33, and the evaporating sheet 42 is a tray. Condensed water stored in the member 41 is absorbed by capillarity, and the air that has passed around the external heat exchanger 22 passes through its upper extension 422 and reaches the low-pressure pipe 33 so as to stand upright on the tray member 41. It is. Thereby, the condensed water generated in the low-pressure pipe 33 can be collected well, and the collected condensed water can be evaporated by the evaporating sheet 42. Moreover, since the air that has passed around the outside heat exchanger 22 passes through the upper extension 422 of the evaporation sheet 42 and reaches the low-pressure pipe 33, when the air passes around the low-pressure pipe 33, The temperature is sufficiently low, and the refrigerant passing through the low-pressure pipe 33 is not heated more than necessary.

  Therefore, according to the refrigerant circuit device according to the present embodiment, it is possible to favorably evaporate the condensed water and to suppress the reduction of the cooling capacity of the internal heat exchanger 24.

  Further, since the refrigerant passing through the low-pressure pipe 33 is not heated more than necessary, it is not necessary to wind a heat insulating material around the low-pressure pipe 33, thereby reducing costs by reducing the number of parts. And the assembly of the apparatus can be facilitated.

  In the refrigerant circuit device, the external heat exchanger 22 flows the refrigerant compressed by the compressor 21 through the first refrigerant inlet 22a1 and directs the refrigerant that has passed through the refrigerant outlet 22a2 to the expansion mechanism 23. The first refrigerant flow path 22a to be discharged and the first refrigerant flow path 22a are joined in the middle of the first refrigerant flow path 22a, and the refrigerant supplied from the left-side heat exchanger 24c flows in through the second refrigerant inlet 22b1, In addition, a second refrigerant flow path 22b is provided that allows the refrigerant that has passed through itself through the junction P2 to enter the first refrigerant flow path 22a and flow out from the refrigerant outlet 22a2. As a result, when the CCC operation and the HCC operation are performed, the refrigerant flow path of the external heat exchanger 22 can be shared, and compared with the conventional refrigerant flow path that is completely independent. It can be made smaller.

  Therefore, according to the refrigerant circuit device which is this Embodiment, size reduction of the external heat exchanger 22 can be achieved.

  In addition, by reducing the size of the external heat exchanger 22, it is possible to reduce an unused amount, that is, a so-called stagnation amount in the refrigerant sealed in the refrigerant circuit 10 when performing CCC operation, HCC operation, or the like. it can. Moreover, by enclosing a sufficient amount of refrigerant in the refrigerant circuit 10, sufficient cooling capacity and heating capacity can be exhibited without installing an electromagnetic valve or the like more than necessary, thereby reducing costs. You can also plan.

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

  In the embodiment described above, the case where the CCC operation and the HCC operation are performed has been described. However, in the present invention, the HHC operation may be performed by driving the heater.

  In the above-described embodiment, the high-pressure refrigerant flow path 246 is provided only in the left-inside heat exchanger 24c. However, the high-pressure refrigerant flow path may also be provided in the internal heat exchanger. . In this case, the high-pressure refrigerant introduction pipe and the heat radiating pipe branch in the middle and are connected to the internal heat exchanger.

  As described above, the refrigerant circuit device according to the present invention is useful for vending machines that sell products such as canned beverages and plastic bottled beverages.

DESCRIPTION OF SYMBOLS 1 Main body cabinet 10 Refrigerant circuit 20 Main path | route 21 Compressor 22 External heat exchanger 22a 1st refrigerant | coolant flow path 22a1 1st refrigerant | coolant inlet 22a2 Refrigerant outlet 22b 2nd refrigerant | coolant flow path 22b1 2nd refrigerant | coolant inlet 23 Expansion mechanism 24 Internal heat Exchanger 24a Heat exchanger in the right compartment 24b Heat exchanger in the middle compartment 24c Heat exchanger in the left compartment 241 Low pressure refrigerant inlet 242 Low pressure refrigerant outlet 243 High pressure refrigerant inlet 244 High pressure refrigerant outlet 245 Low pressure refrigerant flow path 246 High pressure refrigerant flow path 25 Refrigerant piping 26 Three-way valve 27 Distributor 281 Low-pressure side solenoid valve 282 Low-pressure side solenoid valve 283 Low-pressure side solenoid valve 31 High-pressure refrigerant introduction piping 32 Heat radiation piping 33 Low-pressure piping 41 Receptacle member 42 Evaporating sheet 421 Base 422 Upper extension 50 Metal receiving F1 Internal fan F2 External fan H Heater P1 Merge point P2 Merge point RP Dopaipu S space

Claims (3)

An in-compartment heat exchanger for exchanging heat between the refrigerant passing through its own flow path and the internal air of the target chamber in which it is disposed;
A compressor that is disposed in a machine room outside the target chamber and sucks and compresses the refrigerant that has passed through the internal heat exchanger;
An external heat exchanger disposed in the machine room and configured to exchange heat between the refrigerant compressed by the compressor and the ambient air when cooling the internal air of all target rooms;
An expansion mechanism that is disposed in the machine room and adiabatically expands the refrigerant that has passed through the external heat exchanger and sends the refrigerant to a predetermined internal heat exchanger; In the refrigerant circuit device,
A tray member disposed in a lower region of a low pressure portion corresponding to a path from the expansion mechanism of the refrigerant circuit to the compressor in the machine room, and storing condensed water generated in the low pressure portion;
The saucer is formed of a water-absorbing material capable of absorbing condensed water stored in the saucer member by capillary action, and air passing through the outside of the external heat exchanger passes through itself to reach the low-pressure part. An evaporative sheet body standing on the member.   The refrigerant circuit device according to claim 1, wherein the evaporative sheet body is erected between a sending unit that allows outside air to pass around the outside heat exchanger and the low-pressure portion.   In the case where the internal heat of some of the target chambers is cooled, the external heat exchanger is supplied with refrigerant and ambient air supplied from the internal heat exchanger disposed in the target chamber to be heated. The refrigerant circuit device according to claim 1, wherein heat exchange is performed between the refrigerant circuit device and the refrigerant circuit device.