WO2023135628A1

WO2023135628A1 - Freezer/refrigerator

Info

Publication number: WO2023135628A1
Application number: PCT/JP2022/000479
Authority: WO
Inventors: 弘文松田; 哲史中津
Original assignee: 三菱電機株式会社
Priority date: 2022-01-11
Filing date: 2022-01-11
Publication date: 2023-07-20
Also published as: JPWO2023135628A1

Abstract

A machine room (5) is provided at a lower portion on the back surface side of a refrigerator body (3) of a freezer/refrigerator (1). In the machine room (5), a first room (7) and a second room (9) partitioned by a partition member (6) are provided. The second room (9) is located downstream of an air flow with respect to a compressor (53). The first room (7) houses the compressor (53), a condenser (55), a fan (71), and a flow path-switching valve (63). The second room (9) houses a dryer (61).

Description

freezer refrigerator

This disclosure relates to refrigerators and freezers.

In a refrigeration cycle circuit in a refrigerator/freezer, a compressor, a condenser, a dryer, a pressure reducer, and a cooler are connected in order by refrigerant piping. A refrigerant circulates in the refrigerant pipe. Moisture may enter the refrigeration cycle circuit in the negative pressure region of the refrigeration cycle circuit. In addition, impurities may circulate together with the refrigerant in the refrigeration cycle circuit. Dryers are provided to capture such moisture or impurities.

The dryer is provided on the upstream side of the flow of the refrigerant with respect to the pressure reducer in which the pipe diameter of the refrigerant pipe becomes small. A dryer is housed in a machine room provided in a refrigerator-freezer together with a compressor and a condenser. The machine room is provided in the lower part of the back side of the freezer/refrigerator. A blower is also housed in the machine room. 2. Description of the Related Art A refrigerator/freezer is provided with a ventilation port for taking in outside air into a machine room and a ventilation port for discharging the air that has flowed through the machine room to the outside.

Air from the outside of the freezer/refrigerator is sent into the machine room through the vents by the blower. In the condenser, heat is exchanged between the refrigerant flowing through the condenser and the supplied air to condense the refrigerant. The air that has undergone heat exchange with the refrigerant flows through the compressor toward the ventilation port. The air will be heated by the heat generated by the compressor as it flows toward the vents.

In the machine room, when the dryer is positioned downstream in the air flow relative to the compressor, heat exchange may occur between the heated air and the dryer to receive and heat the dryer. be. When the dryer is heated, the amount of refrigerant condensed in the condenser or the like may decrease, and the refrigerating capacity of the freezer/refrigerator may decrease.

Patent Document 1 is a patent document that discloses a technique for preventing such a decrease in refrigerating capacity. In the refrigerator-freezer disclosed in Patent Document 1, the dryer is arranged upstream of the air flow in order to suppress heat reception in the machine room. That is, the dryer is positioned between the air vent and the condenser.

JP 2014-48029 A

In the machine room of a freezer/refrigerator, in order to efficiently exchange heat between the air sent into the machine room through the ventilation openings and the refrigerant flowing through the condenser, the area from the ventilation openings to the condenser is provided with air flow. As a design concept, it is required not to place any structures that would hinder it.

For this reason, the refrigerant piping for the refrigerant that flows from the condenser to the dryer through the condenser etc. is arranged so that it is introduced into the machine room from a position corresponding to the downstream side of the air flow in the machine room. In the machine room, when the dryer is arranged between the air vent and the condenser, the refrigerant pipe for the refrigerant flowing into the dryer is arranged from the position corresponding to the downstream side of the air flow to the upstream side. It becomes necessary to pull it around to the position. Therefore, there is a possibility that the routing of the refrigerant pipes may become complicated.

The present disclosure has been made to solve such technical problems, and the purpose thereof is to provide a freezer-refrigerator in which complication of routing of refrigerant pipes is suppressed.

A refrigerator-freezer according to the present disclosure is a refrigerator-freezer having a refrigeration cycle circuit in which a compressor, a condenser, a dryer, a pressure reducer, and a cooler are connected in order by refrigerant pipes, and in which refrigerant circulates. It has a machine room and a blower. The machine room is arranged in the refrigerator body and accommodates a compressor, a condenser and a dryer. The blower is housed in the machine room and blows the fluid outside the refrigerator main body into the machine room. The machine room includes a first room, a second room, and a partition member. The first chamber houses a compressor, a condenser and a blower. A dryer is accommodated in the second chamber. The partition member partitions the first chamber and the second chamber. The second chamber is located downstream of the compressor from the flow of fluid forced into the first chamber by the blower.

According to the freezer-refrigerator according to the present disclosure, in the machine room, the second chamber housing the dryer is arranged downstream of the compressor in the flow of the fluid sent into the first chamber by the blower. As a result, it is not necessary to route the refrigerant pipe for feeding the refrigerant to the dryer between the position corresponding to the downstream side of the air flow and the position corresponding to the upstream side of the machine room. As a result, it is possible to prevent the layout of the refrigerant pipe from becoming complicated.

It is a figure which shows an example of the refrigerating-cycle circuit of the refrigerator-freezer concerning embodiment. In the same embodiment, it is the 1st perspective view which shows typically the structure of a refrigerator-freezer. FIG. 4 is a development view showing an example of the arrangement structure of refrigerant pipes in the same embodiment. FIG. 4 is a partially enlarged plan view showing the structure of the heat exchange section in the same embodiment; In the embodiment, it is a second perspective view schematically showing the structure of the refrigerator-freezer. FIG. 4 is a top view showing the structure inside the machine room of the refrigerator-freezer in the same embodiment. FIG. 4 is a partial perspective view showing a machine room and its surroundings in the freezer-refrigerator according to the same embodiment. It is a side view which shows notionally the structure in the machine room in the refrigerator-freezer which concerns on a 1st comparative example. FIG. 4 is a top view conceptually showing the structure inside a machine room in a refrigerator-freezer according to a first comparative example; It is a top view which shows the structure in the machine room in the refrigerator-freezer which concerns on a 2nd comparative example. FIG. 4 is a top view schematically showing the flow of air in the machine room of the freezer-refrigerator in the same embodiment. FIG. 4 is a partial perspective view schematically showing the flow of air flowing into and out of a machine room in the refrigerator-freezer in the same embodiment.

A refrigerator-freezer according to an embodiment will be described. First, an example of a refrigerating cycle circuit of a refrigerator-freezer will be described.

As shown in FIG. 1, the refrigerating cycle circuit 51 of the refrigerator-freezer 1 includes a compressor 53, a condenser 55, a condenser pipe 57, a cabinet pipe 59, a dryer 61, a flow switching valve 63, a capillary 65, a cooler 67 and a suction. A capillary 69 is provided. The compressor 53 to the suction capillary 69 are connected by refrigerant pipes 73 in this order. The refrigerating cycle circuit 51 also includes a fan 71 that blows air into the condenser 55 .

The compressor 53 compresses the refrigerant into a high-temperature, high-pressure refrigerant. The condenser 55 exchanges heat between the refrigerant flowing through the condenser 55 and the air sent by the fan 71, thereby radiating heat from the high-temperature, high-pressure refrigerant. Condenser pipe 57 and cabinet pipe 59 further dissipate the refrigerant. The dryer 61 removes foreign matter, moisture, etc. contained in the refrigerant.

The capillary 65 decompresses the refrigerant. The capillary 65 includes a first capillary 65a and a second capillary 65b. The first capillary 65a (refrigerant pipe 73) has a small diameter, and the second capillary 65b (refrigerant pipe 73) has a large diameter. The channel switching valve 63 switches the channel to either the first capillary 65a or the second capillary 65b. When the load is low, the coolant flows through the narrow first capillary 65a. When the load is high, the refrigerant flows through the thick second capillary 65b.

The cooler 67 cools the inside of the refrigerator-freezer 1 by exchanging heat between the refrigerant flowing through the cooler 67 and the air inside the refrigerator-freezer 1 . A suction capillary 69 is arranged along the capillary 65 . By performing heat exchange between the refrigerant flowing through the suction capillary 69 and the refrigerant flowing through the capillary 65, the temperature of the refrigerant pipe 73 (suction pipe) connected to the compressor 53 is increased.

Next, the configuration of the refrigerator/freezer 1 will be described. As shown in FIG. 2, the freezer-refrigerator 1 includes, for example, a refrigerator main body 3 that includes a refrigerator compartment 3a, a freezer 3b, and a vegetable compartment 3c. Refrigerator main body 3 (refrigerator-freezer 1 ) includes front surface portion 11 , rear surface portion 13 , first side surface portion 19 , second side surface portion 25 , bottom portion 31 and ceiling portion 33 .

The front part 11 has a refrigerator compartment door 11a, a freezer compartment door 11b, and a vegetable compartment door 11c. The back portion 13 includes a back plate 15 . The first side portion 19 includes a first side plate 21 . The second side portion 25 includes a second side plate 27 . A machine room 5 in which a compressor 53 and the like are arranged is provided in the lower portion (bottom portion 31 side) of the refrigerator-freezer 1 on the side of the back surface portion 13 . An electric box 35 (see FIG. 3) that houses control equipment and the like is arranged on the ceiling portion 33 .

Next, the arrangement relationship of the refrigerating cycle circuit 51 (constituent members) will be described. FIG. 3 is an exploded view of front part 11, back part 13, first side part 19, second side part 25, bottom part 31 and ceiling part 33 of refrigerator-freezer 1. FIG. As shown in FIG. 3, the machine room 5 accommodates a compressor 53 and a condenser 55 connected to the discharge side of the compressor 53 .

A condenser pipe 57 connected to a condenser 55 is arranged on the first side portion 19 , the ceiling portion 33 and the second side portion 25 . A cabinet pipe 59 connected to a condenser pipe 57 is arranged on the front part 11 . A dryer 61 connected to the cabinet pipe 59 is arranged in the machine room 5 . In the machine room 5, a channel switching valve 63 connected to the dryer 61 is further arranged. A capillary 65 is connected to the dryer 61 via a channel switching valve 63 .

A cooler 67 (evaporator) connected to the capillary 65 is arranged on the back portion 13 . Furthermore, a suction capillary 69 connected with a cooler 67 is arranged. A suction capillary 69 is connected to the suction side of the compressor 53 . As shown in FIG. 4, suction capillaries 69 are arranged along the capillaries 65 . Suction capillary 69 and capillary 65 are joined by soldering, for example.

Next, the arrangement structure inside the machine room 5 will be explained. As shown in FIGS. 5 and 6, first, the machine room 5 includes a first metal plate 41, a second metal plate 42, a third metal plate 43, a fourth metal plate 44, a

fifth metal plate

45 and 45 corresponding to the plate-like members, respectively. It is formed in a region surrounded by the sixth metal plate 46 . The first sheet metal 41 is part of the back plate 15 of the back portion 13 . The second sheet metal 42 is part of the first side plate 21 of the first side portion 19 . The third sheet metal 43 is part of the second side plate 27 of the second side portion 25 . The fourth sheet metal 44 is part of the bottom portion 31 .

The fifth sheet metal 45 and the sixth sheet metal 46 separate the inside and outside of the machine room 5 inside the refrigerator body 3 . The fifth sheet metal 45 is arranged to face the fourth sheet metal 44 . The sixth sheet metal 46 is arranged to face the first sheet metal 41 . A first chamber 7 and a second chamber 9 are provided in the machine chamber 5 . The first chamber 7 and the second chamber 9 are partitioned by a partition member 6 . The partition member 6 is arranged to connect the first metal plate 41 and the third metal plate 43 in such a manner that a space surrounded by the partition member 6 and the first metal plate 41 and the third metal plate 43 is formed. .

The first chamber 7 accommodates a compressor 53, a condenser 55, a fan 71, and a channel switching valve 63. A dryer 61 is accommodated in the second chamber 9 . Inside the first chamber 7 , the condenser 55 , the fan 71 , the compressor 53 and the channel switching valve 63 are arranged in this order from the second metal plate 42 toward the third metal plate 43 .

As shown in FIGS. 6 and 7, the second metal plate 42 is formed with a first slit 23 as a first ventilation port communicating with the first chamber 7 . The first metal plate 41 is formed with a second slit 17a as a second ventilation port communicating with the first chamber 7 . The third metal plate 43 is formed with a third slit 29 as a third ventilation port communicating with the second chamber 9 . The first metal plate 41 is formed with a fourth slit 17b as a fourth ventilation port communicating with the second chamber 9 .

By driving the fan 71 , the air outside the refrigerator/freezer 1 is taken into the first chamber 7 through the first slit 23 . The air taken into the first chamber 7 is sent out of the refrigerator-freezer 1 through the second slit 17a. Air flow will be described later.

In the freezer-refrigerator 1 described above, the dryer 61 is housed in the second chamber 9 arranged downstream of the compressor 53 in the air flow in the machine chamber 5 . As a result, it is possible to prevent the routing of the refrigerant pipe 73 from becoming complicated. This will be described in comparison with a refrigerator-freezer according to a comparative example.

As shown in FIGS. 8 and 9, in the refrigerator-freezer 101 according to the first comparative example, the machine room 105 includes a first metal plate 141, a second metal plate 142, a third metal plate 143, a fourth metal plate 144, and a fifth metal plate 145. and a region surrounded by the sixth metal plate 146 . The first sheet metal 141 is part of the rear plate. The second sheet metal 142 is part of the first side plate. The third sheet metal 143 is part of the second side plate. The fourth sheet metal 144 is part of the bottom portion 131 .

The fifth sheet metal 145 and the sixth sheet metal 146 separate the inside and outside of the machine room 105 . The fifth sheet metal 145 is arranged to face the fourth sheet metal 144 . The sixth metal sheet 146 is arranged to face the first metal sheet 141 .

A compressor 153, a condenser 155, a fan 171, a channel switching valve 163 and a dryer 161 are accommodated in the machine room 105. Inside the machine room 105, the condenser 155, the fan 171, the compressor 153, the channel switching valve 163, and the dryer 161 are arranged in this order from the second metal plate 142 toward the third metal plate 143.

A slit 123 communicating with the machine room 105 is formed in the second metal plate 142 . A slit 117 communicating with the machine room 105 is formed in the first metal plate 141 . Air outside refrigerator-freezer 101 is taken into machine room 105 through slit 123 by driving fan 171 as a blower. The air taken into machine room 105 passes through slit 117 and is sent out of freezer-refrigerator 101 .

Inside the machine room 105, the air receives heat released from the driven compressor 153 while flowing inside the machine room 105. Therefore, the dryer 161 arranged on the downstream side of the air flow with respect to the compressor 153 is exposed to the air that has received the heat released from the compressor 153, and the dryer 161 is heated. .

When the dryer 161 is heated, the amount of condensation of the refrigerant condensed while flowing from the compressor 153 through the condenser 155 and the like to the dryer 161 decreases. If the amount of condensation of the refrigerant decreases, the refrigerating capacity will decrease, and the cycle COP (coefficient of performance) may deteriorate.

Therefore, next, a freezer-refrigerator according to a second comparative example for solving such problems will be described. As shown in FIG. 10 , in the refrigerator-freezer 101 according to the second comparative example, the dryer 161 is arranged in the machine room 105 on the upstream side of the air flow with respect to the condenser 155 . Such an arrangement relationship is proposed in Patent Literature 1 as an example.

Here, the layout of the refrigerant piping will be explained. Generally, in the freezer-refrigerator 101, in order to efficiently perform heat exchange between the refrigerant flowing through the condenser 155 and the air sent toward the condenser 155 from the circulation port 129, condensing is performed from the circulation port 129. As a design concept, it is required that no structure that obstructs the flow of air be placed in the region leading to the vessel 155 .

Therefore, like the freezer-refrigerator 101 according to the first comparative example, the dryer 161 is arranged in the machine room 105 on the downstream side of the air flow with respect to the compressor 153, and the condenser pipe and the like (not shown) are installed. The refrigerant pipe that feeds the flowing refrigerant to the dryer 161 is arranged so as to approach the position corresponding to the downstream side of the air flow with respect to the machine room 105 immediately before it is guided into the machine room 105 .

Then, in the case of the freezer-refrigerator 101 according to the second comparative example, the refrigerant pipe 173 is routed so as to approach the position corresponding to the upstream side from the position corresponding to the downstream side of the air flow with respect to the machine room 105. It should be connected to the dryer 161 . Furthermore, the refrigerant pipe 173 must be routed from the dryer 161 to a position corresponding to the downstream side of the air flow and connected to the flow path switching valve 163 . This complicates the layout of the refrigerant pipes.

In contrast to the refrigerator-freezer 101 according to the second comparative example, as shown in FIGS. It is divided into 9 The second chamber 9 is arranged in the machine chamber 5 on the downstream side of the air flow (see arrow) with respect to the compressor 53 . A dryer 61 is housed in the second chamber 9 thereof. Compressor 53 , condenser 55 , fan 71 and channel switching valve 63 are housed in first chamber 7 .

Thus, the dryer 61 is first housed in the second chamber 9 arranged downstream of the compressor 53 in the air flow in the machine chamber 5 . As a result, it is necessary to route the refrigerant piping that feeds the refrigerant flowing through the condenser pipe 57 and the like to the dryer 61 between a position corresponding to the downstream side of the air flow and a position corresponding to the upstream side with respect to the machine room 5. disappears. As a result, it is possible to prevent the layout of the refrigerant pipe from becoming complicated.

Moreover, the partition member 6 prevents the dryer 61 from being exposed to the air that has received the heat released from the compressor 53 . As a result, it is possible to suppress a decrease in the amount of condensation of the refrigerant that has condensed while flowing from the compressor 53 through the condenser 55 and the like to the dryer 61, thereby preventing a decrease in refrigerating capacity.

It should be noted that the freezer-refrigerator 1 described in the embodiment can be combined in various ways as necessary.

The embodiment disclosed this time is an example and is not limited to this. The present disclosure is defined by the scope of the claims rather than the scope described above, and is intended to include all changes within the scope and meaning equivalent to the scope of the claims.

The present disclosure is effectively used for a freezer-refrigerator equipped with a dryer.

1 refrigerator/freezer, 3 refrigerator body, 3a refrigerator compartment, 3b freezer, 3c vegetable compartment, 5 machine room, 6 partition member, 7 first compartment, 9 second compartment, 11 front part, 11a refrigerator door, 11b freezer door, 11c Vegetable compartment door, 13 Back part, 15 Back plate, 17a Second slit, 17b Fourth slit, 19 First side part, 21 First side plate, 23 First slit, 25 Second side part, 27 Second side Face plate, 29 Third slit, 31 Bottom part, 33 Ceiling part, 35 Electric box, 41 First sheet metal, 42 Second sheet metal, 43 Third sheet metal, 44 Fourth sheet metal, 45 Fifth sheet metal, 46 Sixth sheet metal, 51 Freezer cycle circuit, 53 compressor, 55 condenser, 57 condenser pipe, 59 cabinet pipe, 61 dryer, 63 flow switching valve, 65 capillary, 65a first capillary, 65b second capillary, 67 cooler, 69 suction capillary, 71 Fan, 73 refrigerant piping.

Claims

A freezer-refrigerator comprising a refrigeration cycle circuit in which a compressor, a condenser, a dryer, a pressure reducer and a cooler are connected in order by refrigerant piping, and refrigerant circulates,
refrigerator body,
a machine room disposed in the refrigerator body and housing the compressor, the condenser, and the dryer;
an air blower that is housed in the machine room and sends fluid outside the refrigerator body into the machine room,
The machine room is
a first chamber in which the compressor, the condenser and the blower are accommodated;
a second chamber in which the dryer is accommodated;
a partition member that partitions the first chamber and the second chamber,
The refrigerator-freezer, wherein the second chamber is arranged on the downstream side of the flow of the fluid sent into the first chamber by the blower with respect to the compressor.
The decompressor is
a first pressure reducer having a first flow passage cross-sectional area;
a second pressure reducer having a second flow channel cross-sectional area larger than the first flow channel cross-sectional area;
The refrigeration cycle circuit is provided in the refrigerant pipe connecting the pressure reducer and the dryer, and guides the refrigerant that has flowed through the dryer to either the first pressure reducer or the second pressure reducer. including a flow switching valve,
2. The refrigerator-freezer according to claim 1, wherein said channel switching valve is arranged in said first chamber.
The refrigerator main body is
a back part including a back plate arranged on the back side;
a first side surface portion including a first side plate and a second side surface portion including a second side plate, which are arranged to face each other and connect to the back surface portion;
The machine room is arranged at the lower part of the refrigerator main body on the back side,
The machine room is surrounded by a plate-like member,
3. The refrigerator-freezer according to claim 1, wherein said first side plate, said second side plate and said rear plate include said plate member.
A first ventilation port communicating between the first chamber and the outside of the refrigerator main body is formed in a portion of the plate-like member located on the first side plate,
4. The refrigerator-freezer according to claim 3, wherein a portion of said plate-like member located on said back plate is formed with a second ventilation port for communicating said first chamber with the outside of said refrigerator main body.
A third ventilation port communicating between the second chamber and the outside of the refrigerator body is formed in a portion of the plate-like member located on the second side plate,
5. The refrigerator-freezer according to claim 4, wherein a portion of said plate-like member located on said back plate is formed with a fourth ventilation port for communicating said second chamber with the outside of said refrigerator main body.
The refrigerator-freezer according to claim 4 or 5, wherein the condenser, the blower, and the compressor are arranged in order from the side closer to the first vent to the side farther from the first chamber.
the refrigeration cycle circuit includes a condenser pipe and a cabinet pipe arranged in the refrigerant pipe located between the condenser and the dryer;
The refrigerator-freezer according to any one of claims 1 to 6, wherein said condenser pipe and said cabinet pipe are arranged in order from said condenser toward said dryer.
wherein the refrigeration cycle circuit includes a heat exchange unit that exchanges heat between the refrigerant flowing through the refrigerant pipe connecting the cooler and the compressor and the refrigerant flowing through the pressure reducer; Item 8. The refrigerator-freezer according to any one of Items 1 to 7.