JP6537625B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator provided with a fan in a machine room.

  Generally, in a refrigerator, a refrigeration cycle configured by sequentially connecting a compressor, a condenser, an expansion valve, and an evaporator by a refrigerant pipe is used. In this refrigeration cycle, the low-pressure gas refrigerant sucked into the compressor is compressed to a predetermined high pressure and then introduced to the condenser to exchange heat with air to become a high-pressure liquid refrigerant. The high-pressure liquid refrigerant is led to the expansion valve and expanded, and then becomes a low-pressure gas-liquid two-phase refrigerant, is sent to the evaporator, exchanges heat with air, becomes low-pressure gas, is sucked into the compressor and is compressed again. And circulate the above-mentioned refrigeration cycle. Here, in order to introduce outside air for cooling the condenser and the compressor into the interior of the machine room of the refrigerator, a fan is provided in the machine room in which the compressor or the like is installed.

  By the way, there exist some which compare the temperature difference of the temperature detected by the inlet temperature sensor, and the temperature detected by the exit temperature sensor in the refrigerator provided with the fan which cools such a compressor etc. FIG. Then, it has been proposed that the fan is stopped when the temperature difference between the temperature detected by the inlet temperature sensor and the temperature detected by the outlet temperature sensor becomes equal to or greater than a predetermined value (see, for example, Patent Document 1).

  Also, although an example of an air conditioner rather than a refrigerator is illustrated, the flame detection means provided in the air conditioner main body monitors the presence or absence of a flame around the air conditioner main body, and an external flame due to arson and external disaster To detect Then, the flame detection means transmits a flame detection signal to the electronic control means by detecting an external flame, and the electronic control means receiving the flame detection signal closes the opening / closing means and shuts off the power supply by the power supply interruption relay. By doing this, an air conditioner is proposed in which the air passage in the air conditioner main body is shut off by two opening / closing means, and an external flame does not intrude into the inside of the main body (for example, a patent) Reference 2).

  Furthermore, in the refrigeration cycle in which the flammable refrigerant is enclosed, a defrosting means for defrosting the cooler is provided, and the heat generation temperature of the defrosting means is set to a temperature lower than the ignition temperature of the flammable refrigerant. The heater wire is made of a metal that melts and breaks at a temperature less than the ignition temperature of the flammable refrigerant, and the temperature fuse made of a metal that melts and breaks at a temperature lower than the ignition temperature of the flammable refrigerant is the heater wire And the refrigerator wired in series with the lead wire is proposed (for example, refer to patent documents 3).

JP 2003-287334 A JP 11-237103 A JP 2000-329447 A

  In the refrigerator described in Patent Document 1, the fan is stopped when the temperature difference between the temperature detected by the inlet temperature sensor and the temperature detected by the outlet temperature sensor becomes equal to or greater than a predetermined value. However, erroneous detection of the temperature of the temperature sensor may cause a problem in control of the refrigerator, resulting in inconvenience to the user.

  Moreover, in the air conditioner of patent document 2, opening and closing of an air inflow outlet is controlled by detection of an external flame, and the power supply of the air conditioner main body is interrupted | blocked. However, by adopting such a configuration, the number of drive actuators is increased, which results in an increase in cost. In addition, when an erroneous detection of an external flame occurs, the air conditioner system itself is stopped, which causes a problem for the user.

  Furthermore, in the refrigerator described in Patent Document 3, a thermal fuse made of a metal that melts and breaks at a temperature lower than the ignition temperature of the flammable refrigerant is wired in series with the heater wire and the lead wire. However, the refrigerator has a problem that it only uses a sensing device to control an internal heat source and does not have a control mechanism for an external flame which is a disturbance.

  This invention is made on the background of the above subjects, and even if the periphery of a refrigerator is exposed to a flame by a fire etc., it aims at obtaining a refrigerator which controls that a flame flows into the inside of a refrigerator. I assume.

The refrigerator according to the present invention comprises a compressor for compressing a refrigerant, a condenser for condensing the refrigerant compressed by the compressor, a fan for cooling the condenser and the compressor, and driving power to the fan. Wiring, an air intake slit provided on the upstream side of the fan in the flow of air and introducing the outside air, an air intake duct for supplying the air to the fan, and a fixing member for fixing the wiring to the air intake duct. The wiring is tensioned by the fixing member at a standard tension, and a part of the wiring is provided between the fan and the intake slit and within a range of a projection plane of the intake slit. It is

  According to the present invention, the wiring of the refrigerator is configured to be provided within the range of the projection plane of the intake slit. In this way, even if the periphery of the refrigerator is exposed to a flame due to a fire or the like, the wire is broken by the flame entering from the intake slit and the fan is stopped to suppress the flow of the flame into the interior of the refrigerator You can get a refrigerator.

It is a front schematic diagram of the refrigerator concerning Embodiment 1 of this invention. It is an AA cross section schematic diagram of the refrigerator concerning Embodiment 1 of the present invention. It is a schematic internal block diagram of the machine room of the refrigerator which concerns on Embodiment 1 of this invention. FIG. 2 is a schematic enlarged view of an intake duct and an intake slit of the refrigerator according to Embodiment 1 of the present invention. It is the schematic state figure which wound the wiring for drive power supply on the suction slit of the refrigerator which concerns on Embodiment 1 of this invention. It is a correlation diagram with the temperature and time which leads to the combustion loss of the wiring for drive power supply of the refrigerator which concerns on Embodiment 1 of this invention. FIG. 7 is a schematic state diagram in which a temperature fuse is wound around an intake slit of a refrigerator according to Embodiment 2 of the present invention.

  Hereinafter, an embodiment of a refrigerator of the present invention will be described with reference to the drawings. In addition, the form of drawing is an example and does not limit this invention. The same reference numerals in the drawings denote the same or corresponding parts, which are common to the entire text of the specification. Furthermore, in the following drawings, the relationship of the size of each component may differ from an actual thing.

Embodiment 1
[Configuration of refrigerator]
FIG. 1 is a schematic front view of a refrigerator according to Embodiment 1 of the present invention. As shown in FIG. 1, the refrigerator 50 is provided with a cold storage room left door 57 and a cold storage room right door 58 at the top as a double door type open / close door. In addition, below the cold storage room left door 57, an ice making room door 59 is provided, and below the cold storage room right door 58, a switching room door 60 is provided. A freezer room door 61 is provided below the ice making room door 59 and the switching room door 60, and a vegetable room door 62 is provided below the freezer room door 61. The ice making room door 59, the switching room door 60, the freezing room door 61, and the vegetable room door 62 are all constituted by a drawer type door.

  In addition, an operation panel 63 is provided on the surface of the cold storage room left door 57. The operation panel 63 includes an operation switch (not shown) for adjusting the room temperature and setting of each storage room, a liquid crystal display unit (not shown) for displaying the temperature of each storage room, and the like. In the first embodiment, the operation panel 63 is provided on the surface of the left door 57 of the refrigerator, but the present invention is not limited thereto. For example, the inside of the refrigerator 50 or the left door 57 of the refrigerator It may be installed on the surface of the door or on the outside surface of the refrigerator 50.

  In the first embodiment, an example including the refrigerator left door 57, the refrigerator right door 58, the ice chamber door 59, the switching chamber door 60, the freezer room door 61 and the vegetable room door 62 as the door of the refrigerator 50 However, the configuration of the door of the refrigerator 50 is not limited to this. For example, the refrigerator 50 without the ice chamber door 59 or the switching chamber door 60 may be used. Moreover, in this Embodiment 1, although the ice making room door 59, the switching room door 60, the freezer room door 61, and the vegetable room door 62 were shown as an example of the drawer type door, this invention is not limited to this, A drawer You may comprise by doors other than the door of a type | formula.

  FIG. 2: is the AA cross-section schematic diagram of the refrigerator which concerns on Embodiment 1 of this invention. As shown in FIG. 2, the refrigerator 50 is provided with a first heat insulation partition wall 31, a second heat insulation partition wall 32 and a third heat insulation partition wall 33 sequentially from the top inside the box 70 having an open front. ing. A cold storage room 72 is provided above the first heat insulation partition wall 31, and an ice making room 73 and a switching room 74 are provided between the first heat insulation partition wall 31 and the second heat insulation partition wall 32. ing. In addition, a freezer compartment 75 is provided between the second heat insulation partition wall 32 and the third heat insulation partition wall 33, and a vegetable room 76 is provided below the third heat insulation partition wall 33. Although an example in which the vegetable room 76 is provided below the cold storage room 72 in the first embodiment is shown, the present invention is not limited to this, and the vegetable room 76 may be provided above the cold storage room 72 .

  A plurality of door pockets 24 for storing food and the like are provided inside the cold storage room left door 57 and the cold storage room right door 58. Further, a plurality of shelves 25 for placing food and the like are provided on the back side of the refrigerator compartment 72, and below the shelves 25, a chilled chamber upper case 29 and a chilled chamber lower case 30 are provided. Further, a switching chamber case 26 is provided in the switching chamber 74, a freezing chamber case 27 is provided in the freezing chamber 75, and a vegetable chamber case 28 is provided in the vegetable chamber 76.

  On the bottom surface on the back side of the refrigerator 50, there is provided a machine room 10 in which a part of components of a refrigeration cycle circuit such as a compressor (not shown) and a dryer (not shown) for removing water are accommodated. . Further, above the machine room 10 on the back side of the refrigerator 50, a cooling unit configured of a cooler 22 and a fan (not shown) is installed. A refrigeration cycle of the refrigerator 50 is configured by sequentially connecting a compressor, a condenser (not shown), an expansion device (not shown), and a cooler 22 with piping.

[Internal configuration of machine room]
FIG. 3 is a schematic internal configuration diagram of a machine room of the refrigerator according to the first embodiment of the present invention. FIG. 4 is a schematic enlarged view of an intake duct and an intake slit of the refrigerator according to the first embodiment of the present invention. As shown in FIGS. 3 and 4, the machine room 10 is provided with a compressor 1, a condenser 2, a fan 3, an intake duct 4 and a wire 5. The compressor 1 sucks a low-temperature low-pressure refrigerant and compresses the refrigerant to a high-temperature high-pressure state, and is constituted of, for example, an inverter compressor or the like whose capacity can be controlled. The condenser 2 exchanges heat between the air supplied from the fan 3 and the high-temperature and high-pressure refrigerant sent from the compressor 1 to condense the refrigerant to a low-temperature and high-pressure state. The fan 3 is provided between the condenser 2 and the compressor 1 and cools the condenser 2 and the compressor 1.

  An intake duct 4 shown by a dotted line in FIG. 4 is provided on the upstream side of the fan 3 in the air flow to supply the fan 3 with the open air. The intake duct 4 is provided with a plurality of intake slits 4a which are openings for introducing the outside air. The wiring 5 is a wiring for supplying power for driving the fan 3.

  FIG. 5 is a schematic state diagram in which a wire for driving power supply is wound around an intake slit of the refrigerator according to Embodiment 1 of the present invention. As shown in FIG. 5, the wiring 5 is installed along the air intake duct 4 installed on the upstream side of the fan 3 while avoiding contact with other parts in the machine room 10 as much as possible. . The wiring 5 is fixed to the intake duct 4 by the fixing member 5 a so that a part of the wiring 5 is provided between the fan 3 and the intake slit 4 a and within the range of the projection plane of the intake slit 4 a. . By doing this, the outside air introduced into the interior of the refrigerator 50 from the intake slit 4 a comes into direct contact with a part of the wiring 5. That is, if a flame is generated outside the refrigerator 50 due to a fire or the like and the flame flows into the interior of the machine room 10 via the intake slit 4 a by the fan 3, the flame directly strikes a part of the wiring 5 It becomes. Then, the wiring 5 may be broken because the wiring 5 is burnt by a flame and the core wire of the wiring 5 is carbonized and becomes brittle.

  FIG. 6 is a correlation diagram between temperature and time leading to a combustion loss of the wiring for driving power supply of the refrigerator according to the first embodiment of the present invention. As shown in FIG. 6, the horizontal axis of the correlation diagram represents the combustion power, and “candles”, “wood (200 to 500 g)” and “burners” described under the column of combustion power are the respective combustion powers. The firepower source equivalent to is illustrated. Further, the vertical axis of the correlation diagram represents the disconnection time until the wiring 5 is disconnected when it is burned by each combustion thermal power.

  Here, a common flame has a temperature of 800 to 1000 ° C., which corresponds to the burning power of “wood (200 to 500 g)” in FIG. Therefore, the time until the wire 5 breaks is about 5 to 7 minutes, and the wire 5 is broken at an early timing after the flame flows into the machine chamber 10 through the intake slit 4a. Become. Then, when the wiring 5 is disconnected, the driving of the fan 3 can be stopped.

  In addition, by securing the wiring 5 with an appropriate tension and fixing it to the intake duct 4 with the fixing member 5a, the core wire of the wiring 5 may become carbonized and become brittle due to the external flame. Makes it possible to promote the disconnection. Here, as a standard of the above-mentioned appropriate tension, when the wire 5 is not broken naturally by only the tension, and when the core wire of the wire 5 is carbonized and becomes brittle due to being caught by the external flame, the tension is The degree of disconnection is considered.

  With such a configuration, when the outside of the refrigerator 50 is exposed to a flame due to a fire or the like, the fan 3 guides the outside flame into the machine room 10, but the wire 5 is burned first. By breaking the wire, it is possible to stop the driving of the fan 3 and prevent the flame from flowing into the machine room 10. Therefore, it is possible to suppress the spread and spread of parts made of petroleum-derived materials such as plastics in the machine room 10 and the refrigerator 50, and prevent the refrigerator 50 from becoming a new flame source in advance. .

  Further, since no sensing device or control element or the like that acts electrically inside the machine room 10 is used, it is possible to avoid the risk of causing a malfunction due to a malfunction of control of the refrigerator 50 and causing inconvenience to the user. .

[Effect of Embodiment 1]
From the above, according to the first embodiment, the refrigerator 50 includes the compressor 1 for compressing the refrigerant, the condenser 2 for condensing the refrigerant compressed by the compressor 1, the condenser 2 and the compressor 1 And a wire 5 for supplying driving power to the fan 3 and an intake slit 4a provided on the upstream side of the fan 3 in the flow of air for introducing outside air, and a part of the wire 5 is It is provided between the fan 3 and the intake slit 4a and within the range of the projection plane of the intake slit 4a. By doing this, even if the periphery of the refrigerator 50 is exposed to a flame due to a fire or the like, it is possible to obtain the refrigerator 50 that suppresses the flow of the flame into the inside of the refrigerator 50.

Second Embodiment
The basic configuration of the refrigerator according to the second embodiment is the same as that of the refrigerator according to the first embodiment. Therefore, the second embodiment will be described focusing on differences from the first embodiment. The difference between Embodiment 1 and Embodiment 2 is that a thermal fuse is provided in the wiring.

  FIG. 7 is a schematic state diagram in which a thermal fuse is wound around an intake slit of a refrigerator according to a second embodiment of the present invention. As shown in FIG. 7, the machine room 10 is provided with a fan 3, an intake duct 4, a wire 5, and a thermal fuse 6. The thermal fuse 6 is an overheat protection component that senses the heat generation of the device and shuts off the circuit when the temperature reaches a certain level or more.

  The thermal fuse 6 is connected in series to the wiring 5. Moreover, the wiring 5 is installed along the air intake duct 4 installed on the upstream side of the fan 3 while avoiding contact with other parts in the machine room 10 as much as possible. The thermal fuse 6 is fixed to the intake duct 4 by the fixing member 6 a so that the thermal fuse 6 is provided between the fan 3 and the intake slit 4 a and within the range of the projection plane of the intake slit 4 a. By doing this, the outside air introduced into the interior of the refrigerator 50 from the intake slit 4 a comes into direct contact with the temperature fuse 6. That is, if a flame is generated outside the refrigerator 50 due to a fire or the like and the flame flows into the interior of the machine room 10 via the intake slit 4a by the fan 3, the flame directly strikes the thermal fuse 6 .

  With such a configuration, when the outside of the refrigerator 50 is exposed to a flame due to a fire or the like, the fan 3 guides the outside flame into the machine room 10, but the temperature fuse 6 is burned first. It is possible to stop the driving of the fan 3 and prevent the flame from flowing into the machine room 10 by breaking the wire. Therefore, it is possible to suppress the spread and spread of parts made of petroleum-derived materials such as plastics in the machine room 10 and the refrigerator 50, and prevent the refrigerator 50 from becoming a new flame source in advance. .

  The operating temperature of the thermal fuse 6 is preferably equal to or lower than the temperature of the flame, and preferably equal to or higher than the outside air temperature that guarantees the operation of the refrigerator 50. As a specific example of the thermal fuse 6, a thermal fuse for preventing runaway of a defrost heater of a cooler having an operating temperature of 68 to 78 ° C. may be used.

[Effect of Embodiment 2]
From the above, according to the second embodiment, the refrigerator 50 further includes the thermal fuse 6 connected to the wiring 5, and the thermal fuse 6 is between the fan 3 and the intake slit 4a and is an intake slit. It is provided within the range of the projection plane of 4a. In this way, in addition to the effects of the first embodiment, it is possible to obtain a refrigerator that suppresses the flow of the flame into the interior of the refrigerator even if the periphery of the refrigerator is exposed to the flame due to a fire or the like.

  In addition, the thermal fuse has an operating temperature of 68 to 78 ° C. By doing this, it is possible to divert the thermal fuse for preventing the runaway of the defrosting heater of the cooler, and to reduce the cost as compared with the case of newly creating the thermal fuse.

  As mentioned above, although Embodiment 1-2 was described, this invention is not limited to description of each embodiment. For example, it is also possible to combine all or part of each embodiment.

  Reference Signs List 1 compressor, 2 condenser, 3 fans, 4 intake ducts, 4a intake slit, 5 wiring, 5a fixing member, 6 temperature fuse, 6a fixing member, 10 machine room, 22 coolers, 24 door pockets, 25 shelves, 26 Switching room case, 27 freezing room case, 28 vegetable room case, 29 chilled room upper case, 30 chilled room lower case, 31 first insulation partition wall, 32 second insulation partition wall, 33 third insulation partition wall, DESCRIPTION OF SYMBOLS 50 refrigerator, 57 cold storage room left door, 58 cold storage room right door, 59 ice room door, 60 switching room door, 61 freezing room door, 62 vegetable room door, 63 operation panel, 70 box, 72 cold storage room, 73 ice making room , 74 switching room, 75 freezing room, 76 vegetable room.

Claims (4)

A compressor for compressing a refrigerant,
A condenser for condensing the refrigerant compressed by the compressor;
A fan for cooling the condenser and the compressor;
Wiring for supplying driving power to the fan;
An intake slit provided on the upstream side of the fan in the flow of air for introducing external air;
An intake duct for supplying outside air to the fan;
A fixing member for fixing the wire to the intake duct ;
The wiring is
It is tensioned with a standard tension by the fixing member,
Part of the wiring is
A refrigerator provided between the fan and the intake slit and within a range of a projection plane of the intake slit. A compressor for compressing a refrigerant,
A condenser for condensing the refrigerant compressed by the compressor;
A fan for cooling the condenser and the compressor;
Wiring for supplying driving power to the fan;
An intake slit provided on the upstream side of the fan in the flow of air for introducing external air;
And a thermal fuse connected to the wiring .
Part of the wiring is
It is provided between the fan and the intake slit within the range of the projection plane of the intake slit ,
The thermal fuse is
A refrigerator provided between the fan and the intake slit and within a range of a projection plane of the intake slit . It further comprises a thermal fuse connected to the wiring,
The thermal fuse is
The refrigerator according to claim 1, wherein the refrigerator is provided between the fan and the intake slit and within a range of a projection plane of the intake slit. The thermal fuse is
The refrigerator according to claim 2 or 3, wherein an operating temperature is 68 to 78 ° C.

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