JP6591786B2 - refrigerator - Google Patents

Description

  Embodiments of the present invention relate to a refrigerator.

  Conventionally, household refrigerators have been provided with storage rooms such as a refrigerator room, a vegetable room, and a freezer room, and a cooler room containing a cooler is provided on the back wall of the storage room (for example, , See Patent Document 1). In addition, the duct connected to the cooler room has a blowout opening in the back wall of the storage room, and the cool air cooled by the cooler is supplied from the blowout opening into the storage room by the blowing action of the fan device. It has become.

JP2013-127345A

  The refrigerator described above has an arrangement configuration in which a predetermined distance is secured between the fan device and the cooler in order to increase the cooling efficiency or the heat exchange efficiency of the cooler. It tends to spoil the sex.

  Thus, a refrigerator that can save energy and sufficiently secure the storage capacity of the storage room is provided.

The refrigerator of the present embodiment supplies a storage chamber in which a cold air outlet is formed, a cooler for cooling the storage chamber, and cool air cooled by the cooler from the outlet to the storage chamber. A plurality of fan devices for the cooler, and each of the two or more fan devices so as to operate independently. And a damper that opens and closes a flow path of the cool air supplied to the storage chamber. The control means is configured so that each of the two or more fan devices is in a closed state of the damper. The rotational speed is set lower than the rotational speed when the damper is in the open state .

The perspective view from the back side shown in the state which attached the cooler and the fan device about the first embodiment. Vertical side view showing the schematic configuration of the entire refrigerator Configuration diagram of refrigeration cycle Block diagram showing electrical configuration Longitudinal side view showing the vicinity of the cooler and fan device in an enlarged manner The exploded perspective view which expands and shows a pair of fan device and a holding member The perspective view which shows the front cover of a fan unit and a cooling chamber The flowchart which shows the control procedure at the time of refrigeration defrost operation Flow chart showing control procedure during refrigerated cooling operation FIG. 2 equivalent view showing the second embodiment The front view showing the positional relationship of a fan apparatus and a blower outlet about 3rd Embodiment Fig. 9 equivalent Schematic diagram of fan device and cooler showing fourth embodiment Enlarged longitudinal sectional side view showing a fan device and a cooler in the fifth embodiment Enlarged front view showing the right end of the cooler Longitudinal side view showing another modification of the cooler About 6th Embodiment, the time chart which shows the power interruption state of each fan apparatus at the time of refrigeration cooling operation and refrigeration cooling operation FIG. 17 equivalent diagram showing the seventh embodiment FIG. 17 equivalent diagram showing the eighth embodiment. FIG. 17 equivalent diagram showing the ninth embodiment.

<First Embodiment>
The first embodiment will be described below with reference to FIGS. As shown in FIG. 2, the heat insulating box 2 of the refrigerator 1 is configured to have a heat insulating material 10 in a space between a steel plate outer box 3 a and a synthetic resin inner box 3 b. There are a plurality of storage rooms. As a plurality of storage chambers, for example, a refrigeration chamber 4 and a vegetable chamber 5 are provided in order from the top in the heat insulation box 2, and an ice making chamber 6 and a small freezer chamber (not shown) are provided side by side on the lower side, A freezer compartment 7 is provided below these. An automatic ice making device 8 is provided in the ice making chamber 6.

  The refrigerated room 4 and the vegetable room 5 are both refrigerated temperature zones. For example, the refrigerated room 4 is a storage room of 1 to 5 ° C. and the vegetable room 5 is a positive temperature zone of 2 to 6 ° C. The upper and lower walls are partitioned by a synthetic resin partition wall 9. A hinged opening / closing type heat insulating door 4 a is provided at the front opening of the refrigerator compartment 4, and a drawer type heat insulating door 5 a is provided at the front opening of the vegetable room 5. The lower case 11 which comprises a storage container is connected with the back surface part of this heat insulation door 5a. An upper case 11 a that is smaller than the lower case 11 is provided on the upper portion of the lower case 11. A chilled chamber 12 is provided in the lowermost part of the refrigerator compartment 4 (upper part of the partition wall 9). A chilled case 13 is provided in the chilled chamber 12 so that it can be taken in and out.

  The ice making room 6, the small freezing room, and the freezing room 7 are all storage rooms in a freezing temperature zone (for example, a minus temperature zone of −10 to −20 ° C.), and the vegetable room 5 and the ice making room 6 are small. The freezer compartment is partitioned vertically by a heat insulating partition wall 14. A drawer-type heat insulating door 6a is provided at the front opening of the ice making chamber 6, and an ice storage container 15 is connected to the back surface of the heat insulating door 6a. Although not shown, a drawer-type heat insulating door connected to a storage container is also provided at the front opening of the small freezer compartment. A drawer-type heat insulating door 7 a to which a lower storage container 7 b and an upper storage container 7 c are connected is also provided at the front opening of the freezer compartment 7.

  A refrigeration cycle 16 (see FIG. 3) for cooling each storage chamber is incorporated in the heat insulating box 2. As will be described in detail later, the refrigeration cycle 16 includes a refrigeration cooler 17, a refrigeration cooler 18, a compressor 20, a condenser 21, and the like. Further, as shown in FIG. 2, a machine room 19 is provided at the lower end of the heat insulation box 2 on the back side, and a compressor 20, a condenser 21, a defrost water evaporating dish are provided in the machine room 19. 35 etc. are arranged.

  Further, at the back of the storage chambers 4 and 5 in the refrigeration temperature zone, a refrigeration side cooler chamber 32 that houses the refrigeration cooler 17 and a cold air supply duct 30 that is continuous above the cooler chamber 32 are disposed. ing. In other words, the back heat insulating wall of the heat insulating box 2 is provided with a refrigeration-side cooler chamber 32 that also serves as a blower duct and is located behind the chilled chamber 12 at the bottom of the refrigeration chamber 4. A suction port 37 facing the lower end of the refrigerator compartment 4 (above the vegetable compartment 5) is provided at the front lower part of the refrigerator compartment cooler chamber 32. A supply duct 30 is connected in communication. The defrost water from the refrigeration cooler 17 is received by a water receiving portion 33 of the refrigeration side cooler chamber 32 to be described later, and then the defrost water evaporating dish 35 in the machine chamber 19 via the drain hose 34. Evaporates when guided to.

  The cold air supply duct 30 has a predetermined width dimension in the left-right direction (a direction orthogonal to the paper surface of FIG. 2), and is formed so as to extend upward from the cooler chamber 32 side along the back heat insulating wall of the refrigerator compartment 4. ing. The cold air supply duct 30 is provided with a plurality of outlets 30 a that open in the refrigerator compartment 4. As will be described in detail later, for example, two refrigeration side fan devices 31L and 31R are disposed in the refrigeration side cooler chamber 32, and the cool air generated by the cooler 17 by the fan devices 31L and 31R. Is supplied from the outlets 30a of the supply duct 30 to the refrigerator compartment 4 side. In addition, although illustration is abbreviate | omitted, the partition wall 9 (bottom plate of the refrigerator compartment 4) is provided with the communication port which connects the refrigerator compartment 4 and the vegetable compartment 5 in the left and right corners of the rear side. ing.

  As will be described in detail later, the fan devices 31L and 31R are axial fans, and a built-in ball bearing that is hermetically sealed with oil filled therein is employed. Since the sealed state of the ball bearing is maintained, there is no fear that oil inside the bearing leaks even if the fan devices 31L and 31R are installed at any angle.

  When the refrigeration side fan devices 31L and 31R are driven, air is supplied from the suction port 37 on the lower end side of the refrigeration chamber 4 (upper side of the vegetable compartment 5) by the air blowing action of the fan devices 31L and 31R. It is sucked in. Then, the air passes through the refrigeration cooler 17 and becomes cold air, and is supplied into the refrigerator compartment 4 from the outlet 30a of the cold air supply duct 30 (see arrows in FIGS. 2 and 5). The cool air supplied into the refrigerator compartment 4 cools the refrigerator compartment 4, and then a part of the cold air flows into the vegetable compartment 5 through the communication port to cool the vegetable compartment 5. The cold air that has cooled the refrigerator compartment 4 and the vegetable compartment 5 is again sucked into the refrigerator-side cooler chamber 32 through the suction port 37. In this way, cold air circulates, and the refrigerator compartment 4 and the vegetable compartment 5 are cooled.

  A refrigeration-side cooler chamber 38 that also serves as a blower duct is provided in the back of the storage chambers 6 and 7 in the freezing temperature zone of the heat insulating box 2. The refrigeration cooler chamber 38 is provided with a refrigeration cooler 18, a refrigeration side defrost heater 57, and the like at the lower part, and a refrigeration side fan device 39 at the upper part. On the front side of the refrigerating side cooler chamber 38, a cold air outlet 38a is provided at the middle portion, and a suction port 38b is provided at the lower end portion. Below the refrigeration cooler 18, a refrigeration-side water receiver 40 that receives defrost water when the refrigeration cooler 18 is defrosted is provided. The defrost water received by the freezing side water receiving part 40 is led to the defrosting water evaporating dish 35 through the freezing side drain hose 41 passing through the bottom heat insulating wall of the heat insulating box 2 and evaporates.

  Here, when the refrigeration side fan device 39 is driven, the air in the lower freezer compartment 7 is sucked into the refrigeration side cooler chamber 38 from the suction port 38b by the air blowing action of the fan device 39. Then, the air passes through the refrigeration cooler 18, is cooled, becomes cold air, and is supplied from the outlet 38 a to the ice making chamber 6, the small freezer compartment, and the freezer compartment 7. The cool air cools the ice making chamber 6, the small freezer compartment, and the freezer compartment 7, and is then sucked into the freezer side cooler chamber 38 from the suction port 38 b again. In this way, the cold air circulates, and the ice making room 6, the small freezer room and the freezer room 7 are cooled.

  As shown in FIG. 3, the refrigeration cycle 16 includes a single flow without branching from the discharge side of the compressor 20 to the three-way valve 23. The three-way valve 23 branches off into two flows of the refrigeration cooler 17 side and the refrigeration cooler 18, and then merges and is connected to the suction side of the compressor 20.

  A condenser 21 and a dryer 22 are sequentially connected to the discharge side of the compressor 20 via a connection pipe 26. The three-way valve 23 connected to the discharge side of the dryer 22 has two outlets. A refrigeration side capillary tube 24, a refrigeration cooler (evaporator) 17, and an accumulator A1 are sequentially connected to one of the two outlets of the three-way valve 23, and then the compressor 20 via the refrigeration side suction pipe 27. Connected to the inhalation side. The free side capillary tube 25, the freezing cooler 18 and the accumulator A 2 are connected in order to the other of the two outlets of the three-way valve 23, and then through the freezing side suction pipe 28 and the check valve 29. Connected to the compressor 20.

  In addition, the above-mentioned heat insulation box 2 uses the vacuum heat insulating materials 10b, 10c, and 10d (refer FIG. 2) with the urethane 10a as the heat insulating material 10, for example. The vacuum heat insulating materials 10b to 10d are formed by wrapping a core material such as glass fiber with a film obtained by laminating a metal foil member (for example, aluminum foil) and a film member made of, for example, a synthetic resin. It is the structure formed in thin plate shape. The vacuum heat insulating materials 10b to 10d are disposed on the top, back, and bottom of the box 2 as the heat insulating walls, and vacuum heat insulating materials (not shown) are also disposed on the left and right sides of the box 2. .

  In the refrigerator compartment 4, the vegetable compartment 5, and the freezer compartment 7, as temperature sensors for detecting the respective indoor temperatures, the refrigerator temperature sensor (R sensor 46), the vegetable compartment temperature sensor ( V sensor 47) and freezer temperature (F sensor 48) are provided.

  Now, the refrigerator 1 of this embodiment is configured to have a plurality of (for example, two) fan devices 31L and 31R for the cooler 17 with respect to one cooler 17 for cooling. The refrigeration side fan devices 31L and 31R will be described in detail below with reference to “first fan device 31L and second fan device 31R” or simply referred to as fan devices 31L and 31R, with reference to FIGS. Further, since the first fan device 31L and the second fan device 31R are blowers having the same constituent elements, L is used as a constituent element of the first fan device 31L, and R is used as a constituent element of the second fan device 31R. A description will be given collectively with the same reference numerals or the same reference numerals as appropriate.

  The first and second fan devices 31L and 31R include the axial flow fans 51L and 51R and the casings 53L and 53R shown in FIG. 6, and the first and second fan motors 52L and 52R shown in FIG. As shown in FIG. 6, the casings 53L and 53R are arranged at the center via a rectangular frame 53a having a square cylindrical outer peripheral wall and four upper frames 53b from the corners of the frame 53a toward the center. And a provided motor case 53c. A first fan motor 52L is accommodated in the motor case 53c of the casing 53L, and a second fan motor 52R is accommodated in the motor case 53c of the casing 53R.

  The axial fans 51L and 51R are located inside the cylindrical inner wall 53d (see FIG. 6) in the casings 53L and 53R. The axial fans 51L and 51R include a cylindrical rotating cylinder part 51a and, for example, three blades (impellers) 51b integrally formed around the rotating cylinder part 51a with a predetermined twist angle. The rotating cylinder portions 51a of the axial fans 51L and 51R are attached to the rotating shafts 80 (see FIG. 5) of the corresponding fan motors 52L and 52R.

  Fan motors 52L and 52R schematically shown in FIG. 5 include a rotary shaft 80 as a shaft portion and a bearing (not shown) that rotatably supports the rotary shaft 80. The bearing includes, for example, a ball bearing having a plurality of balls arranged between an inner ring and an outer ring. In this ball bearing, for example, an internal bearing space in which oil (oil such as grease) is previously sealed is sealed by a seal (or a shielding material) provided so as to be spanned between an inner ring and an outer ring. Yes. As such a sealed ball bearing, a well-known configuration can be adopted, and the detailed description thereof is omitted. The bearing may be composed of a roller instead of a ball as a rolling element, or another bearing using an oil leakage prevention means other than a seal.

  As shown in FIGS. 5 and 6, each of the fan devices 31 </ b> L and 31 </ b> R is arranged such that the rotation shaft 80 is directed in the vertical direction (see the vertical rotation center axis with reference symbols OL and OR). Here, the depth dimensions (front-rear direction dimensions) Mf1 of the casings 53L, 53R that form the outline of each of the fan devices 31L, 31R coincide with the left-right direction dimensions Mf3 of the casings 53L, 53R, and the depth of the refrigeration cooler 17 It is set so as to substantially coincide with the dimension Me1 (Mf1 = Mf3≈Me1). The depth dimension Mf1 of the fan devices 31L and 31R and the depth dimension Me1 of the refrigeration cooler 17 may be matched.

  Each of the fan devices 31L and 31R is attached and fixed to the refrigeration side cooler chamber 32 by a holding member 60 that is a holding means. The holding member 60 is made of, for example, a synthetic resin material, and has a horizontally long rectangular frame shape extending in the left-right direction as a whole as shown in FIG. The holding member 60 holds the fan devices 31 </ b> L and 31 </ b> R in a state of being separated from each other in the longitudinal direction of the refrigeration cooler 17. Specifically, the holding member 60 arranges the first housing frame 61L that houses the first fan device 31L, the second housing frame 61R that houses the second fan device 31R, and the both 61L and 61R in the left-right direction. And a connecting portion 62 connected to the. Further, latching portions 63L and 63R are integrally provided at both left and right end portions of the holding member 60. Each of the housing frames 61L and 61R has a rectangular cylindrical shape capable of housing the casings 53L and 53R. The upper fitting pieces 61a are provided on both the left and right ends, and the placement portion 61b is provided on the bottom inner edge. ing.

  The first housing frame 61L has a pair of first engaging portions 65L and 65L on the connecting portion 62 side, that is, on the wall portion on the space side between the fan devices 31L and 31R. Each of the first engaging portions 65L, 65L has a strip shape formed so as to be cut downward from the upper end of the side wall portion of the first receiving frame 61L. Further, the first engaging portions 65L, 65L are provided so as to extend upward, and engaging claws 65aL, 65aL that are fitted to the upper edge portion of the casing 53L from the side are provided at the upper ends thereof. Is provided. Similarly, the second housing frame 61R has a pair of second engaging portions 65R and 65R on the wall portion on the connection portion 62 side. The second engaging portions 65R and 65R are also formed in a strip shape, and engaging claws 65aR and 65aR that are fitted from the side with respect to the upper edge portion of the casing 53R are provided at the upper end portions thereof. Thus, the engaging portions 65L, 65L, 65R, and 65R are engaged at positions adjacent to the fan devices 31L and 31R in the longitudinal direction of the holding member 60. Each fan device 31L, 31R is held between the upper fitting piece 61a of the housing frames 61L, 61R and the mounting portion 61b and is locked by the engaging claws 65aL, 65aR (see FIG. 7), and is unitized with the holding member 60 (hereinafter referred to as a fan unit 70).

  FIG. 7 shows a state when the fan unit 70 is assembled from the back side of the refrigerator 1. In the holding member 60 (fan unit 70), the left (right side in FIG. 7) latching portion 63L and the right latching portion 63R each have a reverse U-shaped portion. Is attached to the latched portion (only the latched portion 32a on the right side is shown in FIG. 7). The above-described latching portions 63L and 63R and the engaging claws 65aL and 65aR are all located on the left and right sides with respect to the fan devices 31L and 31R, and the fan unit 70 is moved forward and backward in the storage space of the refrigerator-side cooler chamber 32. It is not bulky in the direction.

  Here, the configuration of the refrigeration cooler 17 will be described in detail. As shown in FIGS. 1 and 5, the refrigeration cooler 17 integrally includes at least a refrigerant circulation pipe 170 and a large number of cooling fins (heat transfer fins) 171 and has a substantially rectangular parallelepiped shape as a whole. Specifically, the refrigeration cooler 17 mainly includes a refrigerant circulation pipe 170 bent in a serpentine shape, and a large number of thin strip-shaped cooling fins 171 (see FIGS. 14 and 15) are fitted into the pipe 170. In the configuration. On the U-shaped portion side of the refrigerant flow pipe 170, slightly thick end plates 172 are disposed on both the left and right ends of the cooling fins 171 group, so that a substantially rectangular parallelepiped shape is maintained. Each of the members 170 to 172 in the cooler 17 is made of, for example, an aluminum material. A meandering refrigeration side defrost heater 56 (see FIG. 14) is disposed on the front and rear outer surfaces of the refrigeration cooler 17.

  In the refrigeration cooler 17, the depth dimension Me1 and the vertical dimension Me2 are substantially the same, and the horizontal dimension Me3 is set to be larger than the dimensions Me1 and Me2 (Me1≈Me2 <Me3). That is, in the refrigeration cooler 17 of the present embodiment, the side along the depth direction and the vertical direction of the periphery thereof is the short side, and the side along the left-right direction is the long side, and the longitudinal direction of the cooler 17 is Left and right direction.

  When viewed from the direction perpendicular to the upper surface of the refrigeration cooler 17 where the fan devices 31L and 31R are arranged (that is, viewed from the upper side in FIG. 1), the fan devices 31L and 31R of the fan unit 70 are the cooler 17 Between the right edge 17a (left end plate 172 in FIG. 1) and the left edge 17b (right end plate 172 in FIG. 1). In FIG. 1, for convenience of explanation, the first distance W1 from the right edge 17a of the cooler 17 to the right end of the second fan device 31R, the inter-fan distance W0 between the fan devices 31L and 31R, and the cooler 17 A second distance W2 from the left edge 17b to the left end of the first fan device 31L is shown on the same straight line on the lower side of the drawing. As described above, the fan unit 70 is arranged such that the fan devices 31L and 31R are arranged in the longitudinal direction of the cooler 17 at predetermined distances W0, W1 and W2 with respect to the refrigerating cooler 17 when viewed from the upper side in FIG. Takes form. In the figure, the fan distance W0 is slightly larger than the left and right spaces W1 and W2 (W0> W1 = W2 or W0≈W1 = W2). May be set to have the same or substantially the same size.

  Further, as shown in FIG. 5, the fan devices 31L and 31R in the fan unit 70 are arranged at positions directly above the refrigeration cooler 17 with a predetermined interval W3. For example, the interval W3 is approximately ½ of the outer dimension Mf1 of the fan devices 31L and 31R, and the fan devices 31L and 31R are provided in the vicinity of the refrigeration cooler 17. Alternatively, the interval W3 may be ½ the diameter of the axial fans 51L and 51R.

  The front cover 32b of the refrigeration side cooler chamber 32 shown in FIG. 7 has a pair of left and right hooked portions 32a formed on the upper side thereof, and the suction port 37 extending in the left-right direction at an intermediate portion in the vertical direction. Is formed. The water receiving portion 33 surrounding the lower side of the refrigeration cooler 17 is accommodated in the lower portion of the refrigeration cooler chamber 32.

  As shown in FIG. 5, the front cover 32 b is provided with a connection portion 32 c connected to the cold air supply duct 30 in the upper part on the rear side. That is, the front cover 32b is a duct member that is connected to the cold air supply duct 30 and forms an air flow path with the back heat insulating wall, and air generated by the fan devices 31L and 31R flows through the front cover 32b. The upper surface wall (ceiling part 32d) of the front cover 32b is formed so as to gradually increase from the front surface side toward the connection part 32c, and to be gently curved backward and upward (see arrow 32r). In other words, the ceiling portion 32d and the connection portion 32c of the front cover 32b are formed as a bell mouth portion having a bell mouth shape as a whole, and expand toward the lower side upstream of the fan devices 31L and 31R. Yes.

  With the ceiling portion 32d, the refrigeration-side cooler chamber 32 can suppress the stagnation of the flow of cool air toward the connection portion 32c above the fan unit 70 and reduce the pressure loss. Further, as shown in FIG. 5, the ceiling portion 32d extends from the front end side to the rear end side of the fan devices 31L and 31R to a position covering the motors 52L and 52R, and is on the refrigerator compartment 4 side. Even if drinking water or the like spills from the fan, the fan motors 52L and 52R are protected from the liquid. Instead of the ceiling portion 32d, a hook portion (not shown) for protecting the fan motors 52L and 52R from the liquid may be provided above the fan devices 31L and 31R.

  In the manufacturing process of the refrigerator 1, the fan devices 31 </ b> L and 31 </ b> R are integrally incorporated as the fan unit 70 by being held by the holding member 60. That is, first, the fan devices 31L and 31R are mounted so as to be fitted into the housing frames 61L and 61R of the holding member 60 from above (see FIG. 6). At this time, since the first engagement portions 65L and 65L are fitted to the first fan device 31L from the upper side with the pair of engagement claws 65aL and 65aL due to their flexibility, the first fan device 31L is surely secured. Retained. Similarly, since the pair of engaging claws 65aR and 65aR are fitted to the second fan device 31R from the upper side by the flexibility of the second engaging portions 65R and 65R, the second fan device 31R is surely secured. Retained.

  As a result, the unitized fan unit 70 is mounted so that the latching portions 63L and 63R at the left and right ends are hooked to the latched portions 32a and 32a of the refrigerator-side cooler chamber 32 (front cover 32b) ( (See FIG. 7). Accordingly, the fan devices 31L and 31R are positioned so that the rotation center axes OL and OR are directed in the vertical direction and have a predetermined positional relationship with the refrigeration cooler 17 described above (see FIG. 1). Therefore, the two fan devices 31L and 31R can be easily and accurately assembled at predetermined positions in the cooler chamber 32. Thus, in the refrigeration-side cooler chamber 32, a cooling air flow is formed in the axial direction (that is, from the bottom to the top) by driving the assembled fan devices 31L and 31R (see FIG. 5). . In the refrigerator side cooler chamber 32, a predetermined space is secured between the ceiling part 32d and the fan devices 31L and 31R, and the flow of cold air is guided to the cold air supply duct 30 side without stagnation.

  In addition, although illustration is abbreviate | omitted, you may arrange | position three or more fan apparatuses with respect to the one refrigeration cooler 17 in the longitudinal direction. Similarly, two or more fan devices may be arranged in the longitudinal direction for one refrigeration cooler chamber 38.

  The refrigeration cooler 17 is provided with the first temperature sensor 55L for the evaporator at a position corresponding to the left first fan device 31L, and at the position corresponding to the right second fan device 31R. A second temperature sensor 55R for EVA is provided. In FIG. 1, for the convenience of explanation, the detection positions of the temperature sensors 55L and 55R are represented by dots. As illustrated in the drawing, the temperature sensors 55L and 55R are arranged on the upper surface portion of the cooler 17 so as to correspond to the axial lines OL and OR of the fan devices 31L and 31R. Each temperature sensor 55L, 55R may be disposed at the middle or lower surface in the vertical direction of the cooler 17 as long as it is at a position corresponding to each fan device 31L, 31R. You may arrange | position by shifting to the side.

  Next, the electrical configuration of the refrigerator 1 will be described with reference to FIG. The control device 50 of the refrigerator 1 includes a first fan motor 52L, a second fan motor 52R, a fan motor 45 of the refrigeration side fan device 39, a three-way valve 23, a compressor 20, defrosting heaters 56 and 57, an R sensor 46, The V sensor 47, the F sensor 48, the first temperature sensor 55L, and the second temperature sensor 55R are connected. The control device 50 is mainly composed of a microcomputer and has storage means such as a ROM and a RAM. Further, the refrigerator 1 is provided with an operation unit 49 (shown only in FIG. 4) for performing temperature setting or operation setting, and the control device 50 also receives input signals such as settings from the operation unit 49. Accept.

  The control device 50 is configured as a control unit that controls the entire refrigerator 1 by executing a control program stored in advance in a ROM or the like. Then, the control device 50 controls each fan motor so that each of the fan devices 31L, 31R, 39 operates independently based on the input signals of the sensors 46 to 48, 55L, 55R, the temperature setting, and the like. The start and stop of 52L, 52R, 45 and the rotation speed are controlled separately. The substrate of the control device 50 is mounted in the machine room 19 of the refrigerator 1. Further, a target temperature value (or a threshold value related to temperature determination), which will be described later, is included in the control program in advance (stored in the storage unit in advance).

  Next, the operation of the above configuration will be described with reference to FIGS. Here, FIG. 8 shows, as the cooling operation by the refrigeration cycle 16, a refrigeration cooling operation for cooling the refrigeration room 4 and the vegetable room 5, and a refrigeration cooling operation for cooling the ice making room 6, the small freezing room, and the freezing room 7. Among these, about the former refrigeration cooling operation, the flowchart of the control which concerns on the fan apparatuses 31L and 31R is shown.

  At the start of the refrigeration cooling operation, the control device 50 cuts off the defrost heater 56 and switches the three-way valve 23 of the refrigeration cycle 16 to supply the refrigerant to the refrigeration cooler 17 to energize the compressor 20. (Step S1). Further, the control device 50 drives the fan devices 31L and 31R (motors 52L and 52R) to rotate forward (step S2). In this case, for each of the fan devices 31L and 31R, the rotation speed is controlled by a pulse width modulation (PWM) method using an inverter, and for example, both are driven at 1000 [rpm]. As will be described later, the rotational speeds of the fan devices 31L and 31R may be different from each other so that resonance does not occur.

  In this way, by the air blowing action of the fan devices 31L and 31R, as described above, the circulation of cool air for cooling the refrigerator compartment 4 and the vegetable compartment 5 occurs (see arrows in FIGS. 2 and 5). During the cooling operation, the control device 50 determines whether or not there is a failure in each of the fan devices 31L and 31R based on the feedback signal (step S3). That is, for the fan devices 31L and 31R, the rotational speed is detected based on the d-axis current that is the current component corresponding to the magnetic flux and the q-axis current Iq that is the current component corresponding to the torque, and the rotational speed and the speed command signal are detected. And determine the failure. Here, for example, if the control device 50 determines that one fan device 31L has failed (YES in step S3), the control device 50 stops energization of the fan device 31L and increases the rotational speed of the other fan device 31R ( Step S4). In this case, the rotational speed of the other fan device 31R is 2000 so that the one fan device 31L changes from 1000 [rpm] to 0 [rpm] (because it cannot be driven and stopped), so [Rpm] is set. Thereby, even if one fan apparatus 31L fails, the fall of an airflow can be compensated.

  Such a cooling operation (normal operation) ends when the accumulated operation time of the compressor 20 reaches a predetermined time (YES in step S5), and shifts to a defrosting operation. Here, FIG. 9 shows the flow of the defrosting operation performed by the control device 50.

  In the defrosting operation, the compressor 20 is cut off by the control device 50, and the defrosting heater 56 is energized (step S11). As a result, the refrigeration cooler 17 is heated and frost is melted, and the temperatures detected by the first temperature sensor 55L and the second temperature sensor 55R for the evaporator (hereinafter referred to as the cooler left temperature T1, the cooler right temperature T2). Rise). Further, the control device 50 drives each of the fan devices 31L and 31R to rotate in the reverse direction, and sets each rotation number to, for example, 1000 [rpm] (step S12). As a result, the positive temperature air in the refrigerator compartment 4 and the vegetable compartment 5 flows from the outlet 30a through the cold air supply duct 30 into the refrigerator-side cooler chamber 32, so that the frost in the refrigerator for refrigeration 17 is removed. Melt. Further, the moisture generated by the defrosting is supplied from the suction port 37 to the vegetable chamber 5 upper end side (the refrigeration chamber 4 lower end side) (that is, a flow in the direction opposite to the arrows in FIGS. 2 and 5 is generated). Moisturize the vegetable room 5.

  When control device 50 determines that refrigeration room temperature R is higher than vegetable room temperature V based on the detected temperatures of R sensor 46 and V sensor 47 (YES in step S13), fan devices 31L and 31R are respectively set. Drive forward rotation (step S17). That is, although the refrigerator compartment 4 is set to a temperature slightly lower than the vegetable compartment 5, for example, when a stored item having a high temperature is stored in the refrigerator compartment 4, the temperature of the refrigerator compartment 4 rises. Therefore, preferential cooling of the refrigerator compartment 4 is achieved by switching the fan devices 31L and 31R to normal rotation.

  Further, when control device 50 determines that both cooler left portion temperature T1 and cooler right portion temperature T2 have exceeded 0 ° C. (YES in step S14), fan devices 31L and 31R are respectively rotated forward. Switching (step S17). That is, during the reverse rotation of the fan devices 31L, 31R, the first and second temperature sensors 55L, 55R are both located on the windward side of the refrigeration cooler 17. Therefore, accurate temperature detection is performed so that the frost of the cooler 17 is melted as much as possible by changing the air direction as the temperatures T1 and T2 of the cooler 17 rise.

  During the reverse rotation driving of the fan devices 31L and 31R described above (NO in step S13 and NO in S14), the control device 50 responds to the left-side temperature T1 and the right-side temperature T2 in the cooler 17. The rotational speed of each of the fan devices 31L and 31R is increased or decreased (step S15). That is, if there is a difference in the degree of frost melting on the left and right in the cooler 17 and the temperature T1 on the left is lower, the control device 50 sets the rotational speed of the fan device 31L to a higher value. To promote defrosting. Or about the other fan apparatus 31R, you may set a rotation speed to a lower value, or you may stop the drive. Thereby, the control apparatus 50 controls so that the temperature distribution in the cooler 17, ie, temperature T1, T2, may be balanced, and the frost of the cooler 17 is melt | dissolved without unevenness. As described above, since the fan devices 31L and 31R are arranged above the cooler 17, the water dissolved in the cooler 17 does not reach the fan devices 31L and 31R.

  Thus, when the reverse rotation of fan devices 31L and 31R is continued for 10 minutes, for example (YES in step S16), control device 50 switches fan devices 31L and 31R to forward rotation (step S17). ).

  The forward rotation drive of the fan devices 31L and 31R in step S17 is set to the above-described 1000 [rpm] or the number of rotations increased or decreased in step S15. Then, when it is determined that either left side temperature T1 or right side temperature T2 of cooler 17 has exceeded estimated defrosting end temperature (YES in step S18), control device 50 reaches that temperature. The driving of the fan devices 31L and 31R corresponding to the temperature sensor is stopped. Specifically, for example, the predetermined temperature estimated that the frost has melted at the temperature detection position of the cooler 17 is 3 ° C., and the driving of the fan device 31L is stopped when the left temperature T1 exceeds the temperature ( Step S19). Alternatively, the rotational speed of the fan device 31L may be set to a lower value. As a result, energy saving in the defrosting operation can be achieved, while the forward rotation drive of the fan device 31R is continued, and the frost can be surely melted.

  Thereafter, if control device 50 determines that left-side temperature T1 in cooler 17 exceeds 3 ° C. and right-side temperature T2 also exceeds 3 ° C. (YES in step S20), the defrosting operation is terminated. . At the end of the defrosting operation, the compressor 20 is energized and the defrost heater 56 is disconnected (see step S1 in FIG. 8).

  As described above, the refrigerator 1 according to the present embodiment includes the storage chamber in which the cold air outlet 30a is formed, the cooler 17 for cooling the storage chamber, and the cool air cooled by the cooler 17 as the outlet. Fan devices 31L and 31R that supply the storage chamber 30a are provided, and one cooler 17 has two or more fan devices 31L and 31R for the cooler 17. According to this, compared with the structure which has one fan apparatus with respect to one cooler 17, an air volume can be increased and a cooling power can be increased, and the heat exchange efficiency of the cooler 17 can be improved. , Energy saving can be achieved. Further, by using the two fan devices 31L and 31R in order to increase the air volume, it is not necessary to increase the fan diameter of the fan devices 31L and 31R, and it is possible to sufficiently secure the storage capacity of the storage chamber. Become.

  The cooler 17 has a substantially rectangular parallelepiped shape having a long side and a short side in a horizontal direction or a vertical direction, and a direction along a side other than the short side in the periphery of the cooler 17 is a longitudinal direction. The two or more fan devices 31L and 31R are arranged in the longitudinal direction of the cooler 17. According to this, two or more fan devices 31L and 31R can be arranged so as not to be bulky with respect to the cooler 17.

  The two or more fan devices 31L and 31R are arranged such that any rotating shaft 80 is oriented in the vertical direction. According to this, the space W3 between the fan devices 31L and 31R and the cooler 17 can be narrowed to make the layout of the fan devices 31L and 31R more compact, and the space efficiency can be improved.

In this case, by setting the interval W3 to be ½ or less of the diameter of the axial fans 51L, 51R, for example, the vertical dimension of the cooler chamber 32 can be made as small as possible in addition to the effects described above.
Since the two or more fan devices 31L and 31R are both provided in the vicinity of the cooler 17, the space taken by the fan devices 31L and 31R and the cooler 17 is suppressed, and the storage space of the storage chamber is sufficiently large. Can be secured.

  The two or more fan devices 31 </ b> L and 31 </ b> R are formed so that their depth dimensions substantially coincide with the depth dimension of the cooler 17. According to this, in improving space efficiency, the size of the fan devices 31L and 31R with respect to the cooler 17 can be made more suitable, and the compactness of the cooler 17 and the fan devices 31L and 31R as a whole is achieved. A simple layout can be realized.

  Further, for example, the fan devices 31L and 31R are not limited to the above dimensions, and for example, the depth dimension Mf1 (or the diameter dimension of the axial fans 51L and 51R) is the depth dimension Me1 of the cooler 17 (the dimension in the direction along the short side). ) To 0.5 times to 1.5 times. According to this, the fan devices 31L and 31R are not so bulky with respect to the cooler 17, and the compactness can be achieved by the close arrangement of the both 1L, 31R and 17. Moreover, according to this, while ensuring the expected heat exchange efficiency in the cooler 17, while being able to obtain the air volume according to the diameter of the axial flow fans 51L and 51R, the fan devices 31L and 31R are unnecessarily large. It does n’t matter.

  The refrigerator 1 includes a first engaging portion 65L that can be engaged with one of the two or more fan devices 31L and 31R, and a second engaging portion 65R that can be engaged with the other fan device 31R. The holding member 60 is engaged with the first engaging portion 65L and the one fan device 31L at positions adjacent to each other in the longitudinal direction, and the second engaging portion 65R and the other fan device. The fan devices 31L and 31R can be held by engaging with 31R at a position adjacent to the longitudinal direction. According to this, since the first engaging portion 65L and the second engaging portion 65R are located adjacent to the fan devices 31L, 31R in the longitudinal direction, the width of the holding member 60 in the direction orthogonal to the longitudinal direction. It is possible to reduce the size and make the mounting structure of the two or more fan devices 31L and 31R slim.

  The two or more fan devices 31L and 31R are separated from each other in the longitudinal direction of the cooler 17, and the cooler 17 is viewed from a direction orthogonal to the surface on the side where the fan devices 31L and 31R are arranged. 17 is arranged so as to fit between one edge of the other edge and the other edge, and the first distance W1 from one edge of the cooler 17 to the fan device 31R on the edge side and between the fan devices 31L and 31R The arrangement is such that the distance W0 and the second distance W2 from the other edge of the cooler 17 to the fan device 31L on the edge side are substantially the same distance or a predetermined distance. According to this, a favorable ventilation characteristic can be obtained in relation to the cooler 17, and the heat exchange efficiency can be further improved.

  The two or more fan devices 31L and 31R are each provided with a control device 50 that controls each of them independently so as to operate independently. According to this, even when two or more fan devices 31L and 31R are driven, resonance can be prevented by controlling the respective rotation speeds to be different. In addition, for example, by increasing the rotation speed of all the fan devices 31L and 31R, a larger air volume and cooling power can be obtained, while saving only the number of rotations by driving only one fan device 31L. Can do.

  The control device 50 is configured to be able to execute control for supplying cool air into the storage chamber by driving one of the two or more fan devices 31L and 31R in a state where one of the fan devices cannot be driven. ing. According to this, even if one fan device becomes impossible to drive due to a failure or the like, the function of supplying cold air to the storage chamber by driving the other fan device can be maintained. Such control may be executed not only during the cooling operation described above (steps S3 and S4 in FIG. 8) but also in steps S3 and S4 during the defrosting operation.

  The control device 50 increases the rotational speed of the other fan device so as to compensate for the decrease in the air volume when one of the two or more fan devices 31L and 31R cannot be driven. According to this, even if one of the fan devices cannot be driven, it is possible to maintain the air flow rate or compensate for the decrease in the air flow rate by driving the other fan device.

  The control device 50 increases or decreases the rotational speeds of the one fan device 31L and the other fan device 31R or drives any one of them according to the detected temperatures of the one temperature sensor 55L and the other temperature sensor 55R. Stop. According to this, the air volume can be appropriately adjusted according to the position where the temperature is detected in the cooler 17, and the cooling efficiency of the cooler 17 can be increased. Further, energy saving can be achieved by appropriately stopping the driving of the fan device.

  During the defrosting operation in which the control device 50 performs the defrosting by heating the cooler 17 with the defrosting heater 56, the detected temperature of one of the temperature sensors 55L and the other temperature sensor 55R reaches a predetermined temperature. When it is determined that the fan device has been operated, the driving of the fan device corresponding to the temperature sensor that has reached the predetermined temperature is stopped. According to this, energy saving can be achieved by stopping the driving of the fan device in the defrosting operation, and frost can be surely melted by continuing to drive the other fan devices.

  Further, when the defrosting operation is repeated a plurality of times, the amount of air from the fan device may be adjusted as appropriate. That is, the first defrosting operation in which the operation time or the rotational speed of the fan device is controlled to be high so that the frost can be surely defrosted to secure a large amount of air during the defrosting operation, and the first defrosting operation. You may perform control which repeats alternately the 2nd defrost driving | operation which drives a fan apparatus with the quantity of a small wind. Here, “the amount of wind” is “the amount of air blown by driving the fan device”, and the above-described air amount, that is, the amount of air per unit time blown by the fan device (per unit time to the storage room). The meaning of the amount of cold air) and the amount of air blown by the fan device during the first defrosting operation (or during the second defrosting operation) are included.

  Therefore, for example, the first defrosting operation, the cooling operation, the second defrosting operation, and the cooling operation are performed alternately by performing the first defrosting operation and the second defrosting operation. Compared with the case where only the operation is repeatedly executed, the defrosting operation time can be shortened or the rotational speed of the fan device can be kept low, so that the power consumption in the fan device can be reduced. In this case, the amount of wind may be reduced by operating only some of the plurality of fan devices.

  More specifically, when defrosting the cooler 17, the fan devices 31L and 31R are rotated at 1500 [rpm], and the temperature sensors 55L and 55R are the first target defrost temperature (for example, the first target temperature). The first defrosting operation is performed by maintaining the air blowing until it is detected that the temperature has increased to + 3 ° C. After the first defrosting operation, the cooling operation is performed, and when defrosting of the cooler 17 is required again, the fan devices 31L and 31R are rotated at 1000 [rpm], and the temperature sensors 55L and 55R are the first. The second defrosting operation is performed by maintaining the blowing until it is detected that the temperature has risen to the second defrosting temperature (for example, −2 ° C.) which is the second target temperature lower than the defrosting temperature.

  In addition, during the first defrosting operation and the second defrosting operation, the fan devices 31L and 31R are rotated in the direction opposite to that during normal cooling, and the frost in the cooler 17 is melted and the cold air becomes high humidity. Is blown toward the vegetable compartment 104. Such a 1st defrost operation and a 2nd defrost operation can be performed instead of said step S13-S20. In this case, the first defrosting operation and the second defrosting operation are executed alternately with the cooling operation in between.

  According to this, since the large power consumption by the fan apparatuses 31L and 31R is not required every time the cooler 17 is defrosted, the power consumption can be reduced. That is, instead of repeating the first defrosting operation with a large amount of power consumption, the second defrosting operation and the first defrosting operation with a small amount of power consumption are alternately repeated, so the power consumption is reduced in a series of defrosting operations. In addition, the defrosting of the cooler 17 can be reliably performed.

  The first defrosting operation and the second defrosting operation not only make the rotation speed [rpm] of the fan devices 31L and 31R different from the defrosting temperature (target temperature) related to the temperature sensors 55L and 55R, By varying the number of fan devices 31L and 31R that are driven during the defrosting operation, a magnitude relationship may be generated in the amount of wind. For example, both the fan devices 31L and 31R are operated in the first defrosting operation, and only one of the fan devices 31L and 31R is operated in the second defrosting operation, or the two fan devices are operated alternately. Anyway.

  Further, the amount of wind may be controlled by operating the fan devices 31L and 31R for a preset time instead of performing the defrosting operation until the temperature sensors 55L and 55R reach the target temperature. That is, for example, by repeating the control of operating the fan devices 31L and 31R for 20 minutes as the first defrosting operation and operating the fan devices 31L and 31R for 3 minutes as the second defrosting operation each time the defrosting operation is performed, You may control so that the quantity of wind (drive time of a fan apparatus) may decrease compared with the case where a 1st defrost operation is repeated.

  Note that the defrosting operation with different power consumption in the defrosting operation is not limited to two types, and more types of defrosting operations may be provided. That is, it is estimated that the three-stage defrosting operation with different power consumption in the defrosting operation is repeated, or the number of door opening / closing times per unit time is counted and the door 17 is opened and closed and the cooler 17 is less frosted. In such a case, a third defrosting operation in which power consumption is further suppressed may be performed instead of the second defrosting operation.

In addition, since the high humidity cold air is blown to the vegetable compartment 104, the humidity in the vegetable compartment 104 can be kept high, and the stored items can be prevented from being dried and stored with good freshness.
The air blowing direction during the defrosting operation is not limited to the direction toward the vegetable compartment, but one of the fan devices 31L and 31R is operated in the forward direction toward the refrigerator compartment 102 and the other is reversely rotated toward the vegetable compartment 104. You may drive at. According to this, an air current that is rotated by two fan devices in the vicinity of the cooler 17 can be generated, and the cooler 17 can be defrosted efficiently.

  The fan devices 31L and 31R include a rotating shaft 80 and its bearings, and blades 51b that generate an air flow in the axial direction by rotating around the rotating shaft 80, and the bearings prevent oil leakage. It is comprised with the bearing containing the means to do. According to this, the freedom degree of design can be raised about fan apparatus 31L, 31R, such as arrange | positioning so that the rotating shaft 80 may face the vertical direction, preventing oil leak.

  A duct member (front cover 32b) that constitutes a flow path of the air generated by the fan devices 31L and 31R is provided, and the front cover 32b is positioned above the fan devices 31L and 31R and is located with respect to the fan devices 31L and 31R. A ceiling portion 32d or a collar portion is formed. According to this, even if drinking water or the like spills from the refrigerator compartment 4 side, the liquid can be prevented from being applied to the fan devices 31L and 31R by the ceiling portion 32d or the collar portion.

  The duct member is positioned above the fan devices 31L and 31R, and is formed with a bell mouth portion that expands toward the upstream side of the fan devices 31L and 31R. According to this, it becomes possible to suppress a stagnation about the flow of the air flow of the fan devices 31L and 31R in the duct member on the downstream side of the duct member, and to reduce the pressure loss. In particular, in the present embodiment, the fan devices 31L and 31R are arranged so as to blow in the vertical direction, so that the desired blowing action can be obtained by suppressing the stagnation of the flow above the fan devices.

Second Embodiment
FIG. 10 shows the second embodiment. The same parts as those in the first embodiment are denoted by the same reference numerals, and different points from the first embodiment will be described.
The refrigerator 100 of the second embodiment is not provided with two coolers, a refrigeration cooler and a freezer cooler, and the vegetable compartment 104 is arranged adjacent to the lower side of the freezer compartment 103. . That is, as shown in FIG. 10, the refrigerator 100 has a configuration in which a refrigerator compartment 102 and a vegetable compartment 104, which are storage compartments in a refrigerated temperature zone, are vertically separated, and a freezer compartment 103 is disposed therebetween. Yes. Further, there is only one cooler 114, and this single cooler 114 is configured to cool the storage room in the freezing temperature zone and the storage room in the refrigeration temperature zone.

  Specifically, inside the heat insulating box 101 of the refrigerator 100, a refrigerator compartment 102, a freezer compartment 103, and a vegetable compartment 104 are provided in order from the top. A heat insulating partition wall 110 is provided between the refrigerator compartment 102 and the freezer compartment 103, and a heat insulating partition wall 111 is also provided between the freezer compartment 103 and the vegetable compartment 104. A duct member 112 that forms a cooler chamber 113 is provided at the rear of the freezing chamber 103. The cooler chamber 113 accommodates the cooler 114 and the fan devices 31L and 31R, and communicates with the cold air supply duct 30 above the cooler chamber 113. The duct member 112 of the cooler chamber 113 has an air outlet 117 formed at the upper end and a suction port 118 formed at the lower end.

  A damper 122 that opens and closes the connection portion is provided at a connection portion between the cold air supply duct 30 and the cooler chamber 113, and the control device 50 controls the opening and closing of the damper 122. Although illustration is omitted, a vegetable room duct is provided below the cold air supply duct 30 so as to extend to the vegetable room 104 side and connect the refrigerated room 102 and the vegetable room 104 to each other. A return duct 128 communicating with the cooler chamber 113 is provided in the heat insulating partition wall 111 on the upper side of the vegetable chamber 104. Although not shown, the refrigerating chamber 102 is provided with the R sensor 46, and the freezing chamber 103 is provided with the F sensor 48.

  In the refrigerator 100 of the present embodiment, only the freezing room 103 is a freezing temperature zone storage room, but in the same manner as in the first embodiment, in addition to the freezing room 103, an ice making room and a small freezing room are provided. You may make it provide. In addition, as shown in FIGS. 2 and 10, the cases 11, 11 a, 13 and the containers 7 b, 7 c, 15 in the storage chambers of the refrigerators 1, 100 are omitted or shaped according to the storage chamber. Can be changed as appropriate.

In the above configuration, when the fan devices 31L and 31R are driven with the damper 122 closed, the cool air cooled by the cooler 114 is supplied into the freezer compartment 103 from the outlet 117, and the cool air in the freezer compartment 103 is supplied. Is circulated so as to be returned from the suction port 118 into the cooler chamber 113, whereby the freezing chamber 103 is cooled.

In addition, when the fan devices 31L and 31R are driven with the damper 122 opened, a part of the cold air cooled by the cooler 114 passes through the cold air supply duct 30 and passes from the outlets 30a to the refrigerator compartment 102. Supplied in. Further, the remaining cool air cooled by the cooler 114 is supplied into the freezer compartment 103 as described above. The cold air that has cooled the inside of the refrigerator compartment 102 flows downward through the vegetable room duct and is supplied into the vegetable room 104 to cool the vegetable room 104. The cold air that has cooled the inside of the vegetable compartment 104 passes through the return duct 128 and is returned to the cooler compartment 113.

  In addition, the vertical dimension Me2 ′ of the cooler 114 of the second embodiment is larger than the vertical dimension Me2 of the cooler 17 of the first embodiment, and the depth dimension Me1 ′ of the remaining cooler 114 and the horizontal direction The dimensions (not shown) are the same as the depth dimension Me1 and the horizontal dimension Me3 of the cooler 17. Therefore, as will be described later, in the cooler 114, the vertical direction and the horizontal direction can be regarded as the longitudinal direction with respect to the depth direction along the short side. In the second embodiment, the front cover 32 b is provided integrally with or separately from the duct member 112, and the fan devices 31 </ b> L and 31 </ b> R are incorporated in the cooler chamber 113 as the fan unit 70. Accordingly, even in the configuration in which both the freezing temperature zone storage room and the refrigeration temperature zone storage room are cooled by the single cooler 114 as in the second embodiment, the control device 50 allows the fan devices 31L and 31R to be Control to drive each is performed. For this reason, the heat exchange efficiency of the cooler 114 can be increased to save energy, and the same effects as those of the first embodiment can be obtained, such as sufficient storage capacity of the storage chamber.

<Third Embodiment>
FIG. 11 is a schematic front view of the duct member 112 showing the third embodiment. The same parts as those of the second embodiment are denoted by the same reference numerals, and different points from the second embodiment will be described.

  The front cover 32b of the duct member 112 has a blowout port 130 formed on the upper left half side in place of the blowout port 117 at the upper end. The outlet 130 is located at an upper position corresponding to the first fan device 31L, and is provided so that the left half side thereof is cut out in a strip shape along the left and right longitudinal directions. Further, the outlet 130 faces the freezer compartment 103 and is formed in the vicinity of the first fan device 31L. As shown in FIG. 11, the holding member 60 ′ of the third embodiment has a connecting portion 62 ′ in a crank shape so as to hold the first fan device 31 </ b> L at a position lower than the second fan device 31 </ b> R. Yes. Or although illustration is abbreviate | omitted, you may make it attach the 1st fan apparatus 31L and the 2nd fan apparatus 31R with respect to the cooler chamber 113, respectively, without using holding member 60 '.

  In the above configuration, the control device 50 efficiently controls the cooling air by performing drive control of the fan devices 31L and 31R and opening / closing control of the damper 122 based on detection signals of the R sensor 46 and the F sensor 48. Can be supplied to the storage room. For example, with the damper 122 closed, only the first fan device 31L can be driven, and cold air can be supplied into the freezer compartment 103 from the outlet 130 near the fan device 31L. More specific control contents of the fan devices 31L and 31R will be described with reference to the flowchart of FIG.

  In the cooling operation, the control device 50 drives the first fan device 31L to rotate forward at the rotational speed N1 and drives the second fan device 31R to rotate forward at the rotational speed N2 (steps S21 and S22). For example, the rotational speed N1 is set to 1000 [rpm] and the rotational speed N2 is set to 1200 [rpm], and these rotational speeds are stored as default values in the storage means. The rotation speeds N1 and N2 can be appropriately changed according to the positional relationship between the outlet 130 and the fan devices 31L and 31R and the volume of each storage chamber.

  The control device 50 determines whether or not the damper 122 is closed in the cooling operation, that is, whether or not only the freezer compartment 103 is cooled (step S23). Here, if the control device 50 determines that the damper 122 is closed (YES in step S23), for example, only the first fan device 31L is driven at the rotational speed N1, and the driving of the second fan device 31R is stopped ( Alternatively, the rotational speed N2 is reduced). Thus, when the freezer compartment 103 is cooled, the air volume as a whole is reduced in accordance with the volume, and cool air is efficiently supplied from the outlet 130 to the freezer compartment 103 by the first fan device 31L. Alternatively, in step S24, for example, the rotation speeds N1 and N2 of the fan devices 31L and 31R are decreased, respectively. Such a process of stopping the fan devices 31L and 31R or changing the setting of the rotational speed is performed by changing the position of the outlets 117 and 130, the arrangement of the fan devices 31L and 31R, or the air blowing of the fan devices 31L and 31R. It can be set according to the ability.

  Thereafter, when control device 50 determines that the rotational speeds of fan devices 31L and 31R are lower than N1 and N2 and damper 122 is open (YES in step S26), control device 50 determines the rotational speeds of fan devices 31L and 31R to N1. , N2 (steps S21 and S22). Thus, steps S21 to S26 are repeatedly executed, and when it is determined that the accumulated operation time of compressor 20 has reached a predetermined time (YES in step S25), the cooling operation is terminated.

  As described above, in the third embodiment, one of the two or more fan devices 31L and 31R is different from the other fan device 31R by being arranged at a position corresponding to the outlet 130. It has become. According to this, cold air can be efficiently supplied from the blower outlet 130 by driving one fan device 31L.

  The arrangement configuration of the outlet 130 and the first fan device 31L of the third embodiment described above may be applied to the refrigerator 1 of the first embodiment. That is, the air outlet 130 of the front cover 32b is provided so as to face the chilled chamber 12, and the first fan device 31L and the second fan device 31R distribute the air volume between the chilled chamber 12 side and the other refrigerated chamber 4 side. Can be performed.

  As described above, the control device 50 stops driving any one of the fan devices 31L and the other fan devices 31R or makes the rotation speeds different between the one fan device 31L and the other fan devices 31R, Control is performed so that the air volume is distributed between one outlet (for example, the outlet 130 of the freezing chamber 103 and the outlet 30a of the chilled chamber 12) and the other outlet 30a. According to this, while being able to raise ventilation efficiency, it becomes possible to perform air volume distribution according to the volume, temperature zone, etc. of a store room.

  A damper 122 that opens and closes a flow path of cool air supplied from the outlet 30a other than the one outlet to the storage chamber is provided, and the control device 50 is a fan device other than the one fan device 31L when the damper 122 is closed. The driving of 31R is stopped or the rotational speed is made lower than the rotational speed when the damper 122 is open. According to this, regardless of opening and closing of the damper 122, an efficient air blowing action can be obtained and energy saving can be achieved.

  In this regard, for example, as shown in FIG. 10, the configuration of the second embodiment in which any one of the fan devices 31L and 31R is not disposed in the vicinity of the outlet 117 of the freezing chamber 103 is the same as that of the third embodiment. Processing (the flowchart of FIG. 12) can be applied. Thus, in the configuration provided with the damper 122 that opens and closes the flow path of the cool air to be supplied to the storage chamber, the control device 50 is configured so that each of the two or more fan devices 31L and 31R is in the closed state. The rotational speed is set lower than the rotational speed when the damper 122 is in the open state. According to this, the desired air volume according to the opening / closing of the damper 122 can be obtained, and energy saving can be achieved.

  As the two or more fan devices 31L and 31R, one having a difference in blowing capacity between one fan device and the other fan device may be used. For example, the external dimensions of the fan device 31L arranged in the vicinity of the outlet 117 may be smaller than the external dimensions of the fan device 31R, and the fan motors 52L and 52R have different rated speeds or the like. It may be used. Even when two or more fan devices are driven, the same effects as those of the above-described embodiment can be obtained. For example, resonance can be prevented by controlling the rotational speeds to be different from each other.

<Fourth embodiment>
FIGS. 13A and 13B are perspective views schematically showing the fan device and the cooler of the fourth embodiment, and different points from the above-described embodiment will be described. As shown in the figure, fan devices 31L ′ and 31R ′ in which the number and shape of the blades 51b of the fan devices 31L and 31R are changed may be used, the arrangement of the coolers 201 and 202 in the refrigerator, the cooler 201 , 202, the arrangement and orientation of the fan devices 31L ′ and 31R ′ may be appropriately changed.

  That is, as shown in FIG. 13A, even if the cooler 201 has a substantially rectangular parallelepiped shape, if the cooler 201 has a stepped portion 201a, the fan device 31L ′ is located in the space of the stepped portion 201a. , 31R ′ may be arranged side by side to improve space efficiency. A specific example of the cooler 201 will be described later as a fifth embodiment.

  In addition, the above-described “longitudinal direction” refers to a direction along a side that is a long side with respect to a side that is the shortest side in the periphery of the cooler having a substantially rectangular parallelepiped shape. For example, in the cooler 202 shown in FIG. 13B, the side 202b along the left-right direction and the side 202c along the front-rear direction are long sides with respect to the short side 202a along the up-down direction. Arranged in a chamber (not shown). In this case, the longitudinal direction of the cooler 202 is the left-right direction or the front-rear direction. Therefore, the fan devices 31L ′ and 31R ′ may be arranged so as not to be arranged in the vertical direction with respect to the cooler 202, but to be arranged in the left-right direction or the front-rear direction which is the longitudinal direction. Further, as illustrated in the figure, the fan devices 31L and 31R may be arranged on the front side of the cooler 202.

<Fifth Embodiment>
FIG. 14 is an enlarged longitudinal sectional side view showing the vicinity of the cooler and the fan device of the fifth embodiment. The same parts as those of the above-described embodiment are denoted by the same reference numerals, and different points from the above-described embodiment are described. .
The refrigeration cooler chamber 301 of the fifth embodiment accommodates a pair of fan devices 31L and 31R (other fan devices 31L ′ and 31R ′ may be used) and a refrigeration cooler 302. The water receiving part 303 is provided. The front cover 300 of the cooler chamber 301 is provided with a cold air outlet 300a that extends obliquely downward in the front, and is provided with a suction port 300b (see the arrow in the figure) located below the front. The fan devices 31L and 31R are arranged side by side so that the rotation center axes OL and OR are directed in the front-rear direction.

  The refrigeration cooler 302 integrally includes at least the refrigerant circulation pipe 170 and a large number of cooling fins 171 and 171a, and has a narrow portion 302a and has a stepped rectangular parallelepiped shape as a whole. Specifically, the refrigeration cooler 302 is provided with a cooling fin 171 a at the upper rear side in addition to the cooling fins 171 of the first embodiment described above to increase the surface area of the cooler 302. All the cooling fins 171 a located at the uppermost stage are shorter in the front-rear direction than the other cooling fins 171. Thereby, between the end plates 172 ′ and 172 ′ on the left and right ends, an accommodation space is formed that is located in front of the cooling fin 171 a in the cooler 302 and can accommodate other members.

  In FIG. 15, for convenience of explanation, the cooling fins 171a are indicated by broken lines. Further, the end plate 172 ′ of the fifth embodiment has a rectangular plate shape that extends upward from the end plate 172 of the first embodiment (see FIG. 14), but is stepped to match the cooling fin 171a. You may form in.

  In this way, the cooler 302 is formed with a narrow portion 302a so as to cut out the front upper portion from the left end to the right end, in other words, to partially narrow the width of the substantially rectangular parallelepiped shape. The “width” in the present embodiment is the length of the short side of the cooler 302 and corresponds to the length in the left-right direction in FIG. The narrow portion 302a of the cooler 302 is located on the side closer to the fan devices 31L and 31R, and an unillustrated attachment portion (or attached portion) of the fan devices 31L and 31R is located. The upper accommodation space of the cooler 302 can accommodate the capillary tube 24, the suction pipe 28, the piping of the accumulator A2 (see FIG. 3) and other members. Accordingly, in a limited space of the refrigeration cooler chamber 301, the cooling fins 171a increase the heat exchange efficiency of the cooler 302, while minimizing the size of the refrigeration cycle 16 including the cooler 302 as much as possible. can do.

  As described above, the cooler 302 of the fifth embodiment is provided with the narrow portion 302a so as to partially narrow the width of the substantially rectangular parallelepiped shape. According to this, while suppressing the enlargement of the cooler 302, it is possible to create a space utilizing the narrow portion 302a, and it is possible to secure the storage volume of the storage chamber.

  In the cooler 302, a narrow portion 302a is formed in a portion close to the fan devices 31L and 31R. According to this, for example, part of the fan devices 31L and 31R (mounting portions and the like) can be positioned in a space vacated by the narrow portion 302a, and space saving can be achieved in relation to the fan devices 31L and 31R. Can do.

  The narrow portion 302a is set to a width dimension that can accommodate a member constituting the refrigeration cycle 16 together with the cooler 302 and other members (a part of the front cover 300 of the cooler chamber 301, etc.). According to this, the whole refrigeration cycle 16 or the configuration around the cooler 302 can be made more compact by the narrow portion 302a.

  Subsequently, a modified embodiment relating to the narrow portion will be described with reference to FIGS. In the cooler 302 shown in FIG. 16A, another cooling fin 171b is provided on the upper rear side of the cooling fin 171a. The cooling fin 171b is shorter in the front-rear direction than the cooling fin 171a, and forms a second narrow portion 302b in the cooler 302. As a result, stepped narrow portions 302a and 302b whose width dimension decreases toward the top are formed on the upper portion of the cooler 302 so as to cut out the front portions of the cooling fins 171a and 171b from the left end to the right end. Has been. As described above, the cooler 302 has a stepped shape by the narrow portions 302a and 302b, and a plurality of narrow portions having different width dimensions are formed so that the steps become a plurality of steps. According to this, it becomes possible to make a more compact arrangement configuration while increasing the heat exchange efficiency as much as possible in relation to the arrangement space of the cooler 302 and other members.

  The cooler 302 shown in FIG. 16B is provided with cooling fins 171c instead of the cooling fins 171a. As shown in the drawing, the front half of the cooling fin 171c is formed with an inclined portion so as to be cut out obliquely downward in the front. As a result, the upper portion of the cooler 302 is formed as an inclined narrow portion 302c whose width dimension becomes narrower as it goes upward. The narrow portion 302c is formed so as to obliquely cut out the front portions of the cooling fins 171c from the left end to the right end of the cooler 302, thereby narrowing the width of the upper portion of the cooler 302. This cooler 302 also has the same effect as that of the above-described embodiment, such as making it possible to accommodate other members using the space that is free in the narrow portion 302c.

<Sixth Embodiment>
FIG. 17 shows a time chart (power interruption state) of each of the fan devices 31L, 31R, 45 in the sixth embodiment, and the differences from the first embodiment will be described. Mr and Mf shown in the figure represent cooling modes corresponding to the above-described refrigeration cooling operation and refrigeration cooling operation, respectively, and the control device 50 alternates each cooling mode (refrigeration cooling operation Mr and refrigeration cooling operation Mf). Repeat the control.

  Here, in the refrigeration cooling operation Mr, as in the refrigeration cooling operation of the first embodiment, the three-way valve 23 of the refrigeration cycle 16 is switched so that the refrigerant is supplied to the refrigeration cooler 17, and the compressor 20 is energized. . In addition, as shown in FIG. 17, the control device 50 drives the fan devices 31L and 31R to rotate forward in the refrigeration cooling operation Mr, while stopping the driving of the refrigeration side fan device 39. In addition, although illustration is abbreviate | omitted, defrosting of the refrigerating cooler 18 is performed by turning on the refrigeration-side defrosting heater 57 while the compressor 20 is turned off periodically (for example, for 24 hours). Done.

  On the other hand, in the refrigeration cooling operation Mf, the three-way valve 23 is switched so that the refrigerant is supplied to the refrigeration cooler 18 while the refrigeration side defrost heater 57 is cut off and the compressor 20 is energized. The device 39 is driven to rotate forward by the control device 50. In addition, when the refrigeration cooling operation Mf is executed, the refrigeration cooler 17 is defrosted at the same time.

  That is, in the refrigeration cooling operation Mf, since the refrigerant does not flow to the refrigeration cooler 17 side, the cooler 17 is not cooled, but the control device 50 drives at least one of the fan devices 31L and 31R (see FIG. 17). As a result, the air in the refrigerator compartment 4 and the vegetable compartment 5 in the refrigeration temperature zone described above is circulated through the cold air supply duct 30 so that the temperature of the refrigeration cooler 17 rises to a positive temperature. The refrigeration cooler 17 is defrosted. Therefore, in the sixth embodiment, the refrigeration side defrosting heater 56 is omitted, and the refrigeration defrosting operation by driving the fan devices 31L and 31R can be performed in parallel with the refrigeration cooling operation Mf.

  More specifically, as shown in FIG. 17, the control device 50 switches from the refrigeration cooling operation Mr to the refrigeration cooling operation Mf, and at the same time stops driving one fan device 31R and drives the other fan device 31L. The refrigeration defrosting operation is performed by continuing the operation (may be reverse rotation driving). For example, when the control device 50 determines that the estimated defrosting end temperature has been exceeded based on the temperature detected by the temperature sensors 55L and 55R, the control device 50 stops driving the fan device 31L. Further, since the control device 50 drives the refrigeration side fan device 39 until it is determined that the refrigeration cooling operation Mf has ended, the drive time of the fan device 31L in the refrigeration cooling operation Mf is equal to the drive time of the refrigeration side fan device 39. It is shorter than that.

  As described above, in the sixth embodiment, the defrosting operation in which the defrosting of the cooler 17 is performed by driving the fan devices 31L and 31R without flowing the refrigerant to the cooler 17 is possible. The number of fan devices 31L and 31R that are driven in the defrosting operation and the cooling operation Mr is made different (the number of fan devices 31L and 31R that are driven during the defrosting operation is reduced). Thereby, about several fan apparatus 31L, 31R, by driving only the number corresponding to the ventilation capacity required by defrost operation and cooling operation Mf, energy saving can be achieved, preventing frost formation deterioration. .

<Other embodiments>
FIG. 18 shows a time chart according to the seventh embodiment, and different points from the above-described sixth embodiment will be described.
In the seventh embodiment, a refrigeration-side defrost heater 56 is provided to energize the defrost heater 56 when the refrigeration cooler 17 is defrosted. The rotational speed of the fan device 31L is the refrigeration cooling operation Mr. It is set to be lower during the freezing and cooling operation Mf than during the hour. For this reason, even if the number of rotations of the fan device 31L during the refrigeration defrosting operation is set to a low value in advance, the defrost heater 56 is caused to generate heat, so that the fan is approximately the same time (or short time) as in the sixth embodiment. The driving of the device 31L is finished. Thereby, the rotation speed of the fan apparatus 31L can be suppressed and energy saving can be achieved.

FIG. 19 shows a time chart according to the eighth embodiment, which differs from the above-described sixth embodiment in the following points.
That is, in the eighth embodiment, the refrigeration-side defrost heater 56 is omitted, and the pair of fan devices 31L and 31R are continuously driven over the refrigeration cooling operation Mr and the refrigeration cooling operation Mf. However, the rotational speed of each of the fan devices 31L and 31R during the refrigeration cooling operation Mf is set to be lower than the rotational speed during the refrigeration cooling operation Mr and stepwise. For this reason, even if it drives both fan apparatuses 31L and 31R at the time of a refrigeration defrost operation, there exists an effect similar to the said embodiment that each rotation speed can be suppressed.

FIG. 20 shows a time chart according to the ninth embodiment, which differs from the above-described eighth embodiment in the following points.
That is, the rotational speeds of the fan devices 31L and 31R during the refrigeration cooling operation Mf are set based on, for example, temperatures detected by the temperature sensors 55L and 55R (or the default values of the respective rotational speeds). For this reason, as shown in FIG. 20, in the refrigeration cooling operation Mf, one fan device 31L is continuously driven with the rotational speed lowered stepwise, and the other fan device 31R has the rotational speed stepped. Stop driving halfway. As described above, by setting the respective rotation speeds for each of the fan devices 31L and 31R according to the air blowing action, the detected temperature, and the like, the defrosting of the cooler 17 can be reliably performed, and energy saving is achieved. It is possible to achieve the same effects as the above embodiment.

  As described in the above embodiment or modification, the number and shape of the coolers, the number and arrangement of the fan devices, the control of the cooling operation and the defrosting operation by the control means, and the like are selectively combined. One embodiment may be adopted. Specifically, for example, in the refrigerator 100 of the second embodiment in which the cooler 114 is one, the first defrosting operation and the second defrosting operation described in the first embodiment may be executed, Instead of the cooler 114 of the second embodiment, the shape of the cooler 302 of the modified form may be adopted, or the like may be appropriately combined.

  Although some embodiments have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  In the drawings, 1,100 is a refrigerator, 4,5,6,7,102,103,104 are storage rooms, 17,114,201,202,302 are coolers, 30a, 117,130 are outlets, 31L, 31R is a fan device (blower fan), 32d is a ceiling part, 50 is a control means, 51b is an impeller, 55L and 55R are temperature sensors, 60 is a holding means, 65L is a first engagement part, and 65R is a second engagement part. , 80 is a rotating shaft, 122 is a damper, 171, 171 a, 171 b and 171 c are cooling fins, and 302 a, 302 b and 302 c are narrow portions.

Claims (7)

A storage room with a cold air outlet,
A cooler for cooling the storage chamber;
A fan device for supplying cold air cooled by the cooler from the outlet to the storage chamber,
The cooler has two or more fan devices for the cooler, and includes control means for controlling each of the two or more fan devices so as to operate independently. With configuration ,
A damper for opening and closing a flow path of the cold air supplied to the storage chamber is provided;
The said control means is the refrigerator which makes each rotation speed lower than the rotation speed at the time of the said open state of the said damper about the said 2 or more fan apparatus in the closed state of the said damper . A storage room with a cold air outlet,
A cooler for cooling the storage chamber;
A fan device for supplying cold air cooled by the cooler from the outlet to the storage chamber;
A compressor for compressing a refrigerant supplied to the cooler;
A defrost heater that heats the cooler by energization,
The cooler has two or more fan devices for the cooler, and includes control means for controlling each of the two or more fan devices so as to operate independently. With configuration,
The control means includes
A first defrosting operation as a defrosting operation in which the defroster heats the cooler with the defrosting heater while the compressor is stopped and drives at least one of the two or more fan devices to perform defrosting; The second defrosting operation can be executed,
In the second defrosting operation, the refrigerator drives the fan device so that the amount of air blown by driving the fan device is smaller than in the first defrosting operation . The refrigerator according to claim 2, wherein the control means repeatedly performs the first defrosting operation and the second defrosting operation alternately . The said control means controls the drive time of the fan apparatus driven in said 2nd defrost operation so that it may become short compared with the drive time of the fan apparatus driven in said 1st defrost operation. Item 4. A refrigerator according to item 2 or 3 . The said control means controls the rotation speed of the fan apparatus driven in said 2nd defrost operation low compared with the rotation speed of the fan apparatus driven in said 1st defrost operation. 3. The refrigerator according to 3 . The control means is configured to reduce the number of fan devices driven during the second defrosting operation to be less than the number of fan devices driven during the first defrosting operation. The refrigerator of Claim 2 or 3 which controls each fan apparatus separately . The refrigerator according to claim 2 or 3, wherein the target temperature in the second defrosting operation is set to a value lower than the target temperature in the first defrosting operation .

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