JP5139109B2 - Refrigerator - Google Patents

Description

  The present invention relates to a refrigerator such as a rapid refrigerator.

  As an example of a quick cooler, a storage room for storing cooked food is provided on one side in the frontage direction inside the cooler body made of a heat insulating box, and a cooler and a cooling fan are installed on the other side. In addition, a refrigeration system including a compressor, an air-cooled condenser, etc., and a machine room equipped with an electrical box, etc. are disposed on the lower surface side of the refrigerator main body. There is known a system in which food is rapidly cooled by circulatingly supplying cold air generated by heat exchange with a cooler to a storage chamber as it is driven. In addition, this kind of quick refrigerator is described in patent document 1, for example.

On the other hand, in this type of quick cooler, the structure of the machine room has been devised in view of the fact that a high refrigeration capacity is required. For example, the machine room is partitioned into upper and lower parts by a partition plate, a refrigeration device is installed in the lower room, and an electrical box is stored in the upper room. Thereby, it becomes possible to efficiently apply cooling air (outside air) to the condenser constituting the refrigeration apparatus, and for the electrical box, the thermal influence from the refrigeration apparatus side is avoided as much as possible from the front side. It is easy to work on maintenance.
Japanese Patent Laid-Open No. 11-63786

By the way, there are cases where an inverter box containing an inverter for controlling the number of rotations of the cooling fan is also stored in the machine room. It is desirable that this inverter box can be serviced from the front side as well as the electrical box, and it is preferable to install it on the side of the electrical box inside the upper room, but a cooling fan with a large capacity is preferable. Because of the required relationship, the inverter box must be larger than the electrical box, and particularly tall, and if the inverter box is stored together with the electrical box in the upper room, the upper or machine room is large. As a result, there is a problem that the quick freezer becomes tall. On the other hand, if the inverter box is housed in the back side of the lower room having a relatively large space, maintenance work or the like from the front side cannot be performed, and further improvement has been desired.
The present invention has been completed based on the above circumstances, and its purpose is to save space while ensuring the convenience of working from the front side when the inverter box is disposed in the machine room. There is a place to plan.

The present invention provides a machine room adjacent to a cooler body made of a heat insulating box having a storage room for storing an object to be cooled and a cooler and a cooling fan provided therein for circulating and supplying cool air to the storage room. In the provided cooler, the machine room is partitioned into an upper chamber and a lower chamber by a horizontal partition plate extending inside, and the lower chamber includes a compressor and an air-cooled condenser. The refrigeration apparatus that is connected to the circulator and constitutes a refrigeration circuit has an electrical box stored in the upper chamber, and a through hole is opened in the partition plate for controlling the rotation speed of the cooling fan. An inverter box in which the inverter or the like is incorporated is characterized in that it is disposed from the upper chamber to the lower chamber while penetrating the through hole.
According to this configuration, the inverter box is housed in the upper chamber in a state where the inverter box passes through the partition plate and the lower side faces the lower chamber. This makes it possible to perform work such as maintenance of the inverter box from the front side, and avoids an increase in the space of the upper chamber, that is, the machine room.

The following configuration may also be used.
(1) The machine room is formed in a box shape having an upper surface opening by stretching a panel on a chassis formed by assembling a plurality of frames, and the cooling body is placed on the upper surface of the machine room. A fixing plate for fixing the inverter box is provided between the outer bottom surface of the refrigerator main body and the partition plate. Since the fixed plate is passed between the outer bottom surface of the refrigerator main body and the partition plate integrated with the chassis, it is effective for structural reinforcement of the chassis and the machine room.

(2) While the said fixed plate is provided facing the front so that the hole edge of the back | inner side in the said through hole may be followed, it is with respect to the said fixed plate from the right and left side edges in the back surface of the said inverter box. A mounting plate to be screwed is formed in a protruding manner. The inverter box can be attached to and detached from the fixed plate from the front side of the machine room. If the width dimension between the overhanging ends of both mounting plates is larger than the width dimension of the through hole, the inverter box will not fall into the lower chamber, so that the screwing operation is easy.
(3) While the said fixed plate is provided facing the front so that the hole edge of the back side in the said through hole may be followed, from the right and left side edges in the back surface of the said inverter box, it is with respect to the said fixed plate. A mounting plate to be screwed is formed in a protruding manner. The number of parts can be reduced.

(4) The mounting plate is formed integrally with a back plate constituting the inverter box.
When removing the inverter box from the fixed plate, loosen the screw, lift the inverter box until the large diameter part in the insertion hole of the mounting plate comes to the position of the screw, and then pull the inverter box toward you to remove the large diameter part. Pass the screw head through the screw head, remove the mounting plate in front of the screw, tilt the upper side of the inverter box toward you, and lift the lower side through the through hole into the upper chamber. It can be taken out.
When fixing the inverter box, conversely to the above, if the lower side of the inverter box is placed in the through hole and is in a standing posture, the large diameter portion of the insertion hole is passed through the screw head, and then the inverter box is lowered. Since the shaft portion fits into the small diameter portion, the inverter box is fixed by subsequently tightening the screw. The operation of detaching the inverter box from the front with respect to the fixed plate can be easily performed.

  (5) A large number of through holes are opened in the peripheral surface of the inverter box. This is effective when the built-in inverter is thermally protected.

  According to the present invention, when the inverter box is disposed in the machine room, it is possible to save space while ensuring the convenience of working from the front side.

<Embodiment>
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In this embodiment, the case where it applies to a quick refrigerator is illustrated.
As shown in FIG. 1, the rapid cooler according to the present embodiment includes a leg 12 disposed on the bottom surface of the machine room 11, on which a cooler body 10 (hereinafter simply referred to as a main body 10) is placed on the upper surface of the machine room 11. Is supported by.
The main body 10 is composed of a vertically long heat insulating box whose front surface is opened, and a heat insulating door 14 (FIG. 2) can be swingably opened and closed around the left edge when viewed from the front. It is installed. As shown in FIG. 2 and FIG. 3, in the inside of the main body 10, that is, in the warehouse, an area of about 60% on the right side when viewed from the front is the food storage chamber 15, and the remaining left side area is the cooling unit 20. It becomes the installation room 16 of.

The cooling unit 20 is a unit obtained by assembling a cooler 21 and two cooling fans 22. The cooler 21 is formed in a vertically long block shape having a height dimension slightly lower than the inside height of the cabinet and a width that is a little more than half of the depth inside the cabinet, and is opposite to the surface on the storage chamber 15 side and the opposite side. The cooler cover 23 is provided with openings on both sides. On the other hand, two cooling fans 22 are arranged in the fan case 24 in the vertical direction, and the fan case 24 is attached to the front side of the cooler cover 23 so as to be able to swing open and close. 20 is formed. In the cooling unit 20, the two cooling fans 22 are arranged in the vertical direction immediately before the cooler 21.
Such a cooling unit 20 is installed in the installation chamber 16 on the left side in the cabinet, and more specifically, at the substantially central portion in the height direction and the depth direction in the cabinet, Is installed in a form with a predetermined gap between the left side wall 10L in the cabinet.

In the storage room 15 on the right side of the cabinet, a plurality of trays T such as hotel pans can be put in and out from the front and stored. Therefore, a pair of tray receivers 25 are attached to the front plate 24A of the fan case 24 in the cooling unit 20 on the left and right side surfaces of the storage chamber 15 and the right side wall 10R in the store. .
The tray receiver 25 is made of a wire material such as a stainless steel wire, and roughly includes a frame body 26 having a vertically long rectangle, and mounting rods 27 are arranged in a plurality of stages (a certain pitch between the vertical frames). 12, and a mounting portion 28 having a vertically long ring shape is formed at the four corner positions of the frame body 26.

  On the other hand, attachments 29 are attached to the front plate 24A of the fan case 24 and the right side wall 10R in the cabinet at four corresponding locations, and each tray receiver 25 corresponds to the attachment portions 28 at the four corners. By being hooked on the fixture 29, it is detachably attached in a form facing the left and right side surfaces of the storage chamber 15. As shown in FIG. 2, the tray T is loaded and unloaded from the front while being placed on the mounting rod 27 facing the left and right flanges at the same stage.

  Next, the structure of the machine room 11 will be described. The machine room 11 is formed with a height slightly more than half that of the main body 10, and as shown in FIG. 4, the pillars 32 made of an angle material or a channel material are erected from the four corners of the bottom plate 31, so that the chassis 30 is formed. The upper ends of the pillars 32 are joined to the four corners of the outer bottom surface of the main body 10. The above-described legs 12 are attached to the four corners of the bottom surface of the bottom plate 31. The machine room 11 is formed by stretching the panels 46 and 48 on the rear surface and the left and right side surfaces of the chassis 30.

In the machine room 11, the partition plate 35 is stretched in a horizontal posture at a height position of about ¾ of the total height, and is divided into an upper chamber 38U and a lower chamber 38D. A square notch 36 is formed at the center in the width direction of the rear end of the partition plate 35.
As shown in FIG. 5, a refrigeration apparatus 40 is mainly installed in the lower chamber 38D. An air-cooled condenser 41 is installed facing the front opening, and a condenser fan 41A is installed immediately thereafter. A compressor 42 is installed on the side.

  As shown in FIG. 1, a front panel 44 in which three intake ports 45 shown in the figure are arranged in the horizontal direction is detachably mounted in the front opening of the lower chamber 38D. Further, as shown in FIG. 6, the rear panel 46 of the machine room 11 has an exhaust port that opens to almost the entire width from a position that is a predetermined dimension above the bottom surface of the lower chamber 38 </ b> D to the ceiling surface of the upper chamber 38 </ b> U. 47 is formed, and an auxiliary exhaust port 47A in which a plurality of vertically oriented slits are arranged is formed at a position close to the back side of the side panel 48 constituting the left and right side surfaces of the lower chamber 38D.

  The refrigeration apparatus 40 installed in the lower chamber 38D and the cooler 21 provided in the cooling unit 20 are circulated through a refrigerant pipe 50 to constitute a refrigeration circuit. More specifically, the refrigerant pipe 50 </ b> A withdrawn / withdrawn from the cooler 21 is lined up through the through-hole 52 opened in the back wall of the installation chamber 16, protrudes to the back side, and then bent downward, and its lower end Is further bent to the near side, introduced into the lower chamber 38D from the upper chamber 38U through the notch 36 of the partition plate 35, and connected to the refrigerant pipe 50 that is taken in and out of the refrigeration apparatus 40.

  The cooling operation is performed by driving the refrigeration apparatus 40 (compressor 42) and the cooling fan 22, and the air in the storage chamber 15 passes through the fan case 24 as shown by the arrow in FIG. Cold air is generated while it is sucked into 20 and passes through the cooler 21, and the cold air blown out to the back side of the cooling unit 20 hits the left side wall 10 </ b> L in the cabinet and is divided into the front and back, and the cooling unit 20 After wrapping around the front and back side surfaces, a circulating flow is generated in which a part of the food flows into the storage chamber 15 while flowing to the right side wall 10R, thereby rapidly cooling the food in the tray T. It is like that.

During this time, the internal temperature is detected by an internal temperature sensor 54 (see FIG. 3) provided on the back side surface of the cooling unit 20, and based on a comparison between the detected temperature and a predetermined internal set temperature. As a result, the refrigeration apparatus 40 is turned on and off, and the interior of the refrigerator is maintained at substantially the set temperature.
On the other hand, the core temperature sensor 55 is inserted into the stored food to detect the core temperature (internal temperature) of the food, and when the detected temperature drops to a predetermined core temperature set temperature, a predetermined temperature is detected. It is considered that the rapid cooling is completed, and the cooling operation is stopped. Note that, depending on the selection of the operation mode, the operation is switched to a cold storage operation in which the rapidly cooled food is stored in a refrigerated or frozen state.

Therefore, in the upper chamber 38U of the machine room 11, an electrical equipment box 57 in which a control device and various electrical components are stored is stored in order to execute various control operations. The electrical box 57 is formed in a rectangular box shape that is horizontally long and low in height, and is housed in a form that fits almost completely in a slightly over half area on the left side as viewed from the front and close to the front opening. Yes.
An operation panel 58 is detachably attached to the front opening of the upper chamber 38U. Although not shown in detail on the surface of the operation panel 58, an operation unit provided with various operation buttons and a display unit are provided. By operating the operation buttons, the operation mode is set and the internal temperature is set. Are set and displayed on the display unit.
In addition, various connection ports, adjustment units, and the like are arranged on the front side of the above-described electrical equipment box 57. Therefore, if the operation panel 58 is removed, maintenance can be performed while the electrical equipment box 57 remains in the upper chamber 38U. Is possible.

  Now, in the rapid cooler of this embodiment, an inverter is used to control the rotational speed of the cooling fan 22 to circulate the cold air, and it is necessary to equip the machine room 11 with an inverter box 60 storing this. is there. Here, it is necessary to use the cooling fan 22 having a large capacity to cope with the rapid cooling, and since the cooling operation can be performed and the control range of the rotation speed is widened, the inverter and thus the inverter box 60 must be enlarged. I do not get. In this embodiment, it is a vertically long shape having a height slightly less than twice that of the electrical box 57 (see FIG. 5).

  On the other hand, it is desirable that the inverter box 60 can be serviced from the front side in the same manner as the electrical box 57, and it is preferable that the inverter box 60 be installed on the side of the electrical box 57 in the upper chamber 38U. As long as the inverter box 60 is tall, the upper chamber 38U must be enlarged if it is to be stored together with the electrical box 57 in the upper chamber 38U. When housed inside the chamber 38D, maintenance work or the like from the front side cannot be performed.

Therefore, in this embodiment, the arrangement of the inverter box 60 is devised.
As shown in FIGS. 7 and 8, the inverter box 60 is formed by assembling a main body 61 having an open back and left side, a back plate 62, and a left side plate 63 (illustrated by imaginary lines in FIG. 7). As a whole, it is formed in a square box shape whose plan shape is slightly horizontally long and taller than the electrical box 57. A vertically long mounting plate 65 is formed so as to protrude from the left and right side edges in a substantially upper half region of the back plate 62, and an insertion hole 66 for a screw 70 (FIG. 10) is vertically formed on the right mounting plate 65. In the left mounting plate 65, one insertion hole 66 is formed at a substantially middle height position. Each insertion hole 66 is a so-called daruma hole. The insertion of the shaft portion 71A in the screw 70 described above is allowed, but the small diameter portion 67A in which the head 71B cannot be inserted, and the head of the screw 70 The large-diameter portion 67 </ b> B that allows the insertion of 71 </ b> B is formed in a shape in which the large-diameter portions 67 </ b> B communicate with each other and are arranged vertically.
Further, through holes 68 made up of a number of punch holes are opened on the front surface, the back surface, the left and right side surfaces, and the bottom surface of the inverter box 60.

As shown in FIGS. 4 and 10, the partition plate 35 stretched in the machine room 11 has an inverter on the right side of the installation position of the electrical box 57 and at a position corresponding to the rear end side of the electrical box 57 as shown in FIGS. A through hole 72 that can vertically penetrate the box 60 is opened. The through-hole 72 is formed in a square hole shape having a lateral width substantially equal to the lateral width of the inverter box 60 and a depth larger than the depth dimension of the inverter box 60 (a little less than twice).
A fixing plate 75 for detachably attaching the inverter box 60 is provided at a position immediately behind the through hole 72 in the upper chamber 38U.

  As shown in FIG. 9, the fixing plate 75 has a height smaller than the distance between the ceiling surface of the upper chamber 38U, that is, the outer bottom surface of the main body 10, and the inner bottom surface of the upper chamber 38U, ie, the partition plate 35 (see FIG. 10) And an oblong rectangular shape having a lateral width equal to the distance between the projecting ends of both projecting mounting plates 65 in the inverter box 60. A mounting plate 76A bent at a right angle toward the front side is formed at the upper edge of the fixing plate 75, and a mounting plate 76B bent at a right angle toward the back side is formed at the lower edge. An insertion hole 78 of a screw 83 (FIG. 10) is formed in the part, and a screw hole 79 is formed in the left and right ends of the lower mounting plate 76B.

A bracket 80 is provided on the outer bottom surface of the main body 10, and the bracket 80 is positioned horizontally above the rear end of the through-hole 72 and at a height that is a predetermined dimension below the ceiling surface. A support plate 81 is provided which extends in the above.
In the fixing plate 75, the lower mounting plate 76B is placed on the inner edge of the through hole 72 of the partition plate 35, and the screws 83 passed through the insertion holes 84 of the partition plate 35 are the screws on the left and right ends. Screws 83 passed through the insertion holes 78 at both the left and right ends are fixed by screwing into the holes 79, and the upper mounting plate 76A is applied to the support plate 81 of the bracket 80 provided on the outer bottom surface of the main body 10. Is fixed by being screwed into a screw hole 85 formed in the support plate 81.

The present embodiment has the above-described structure, and the inverter box 60 is attached as follows.
First, screws 70 are temporarily fixed to a total of three screw holes 77 on the left and right sides of the fixing plate 75. Subsequently, the lower end side of the inverter box 60 is passed through the through hole 72 of the partition plate 35, and the height is adjusted at a position slightly in front of the fixing plate 75 as shown in FIG. The 66 large-diameter portions 67B are aligned with the corresponding screw 70 positions. From this state, as shown by an arrow a in the figure, the back plate 62 is applied to the front surface of the fixing plate 75 while passing the large-diameter portion 67B of each insertion hole 66 through the head portion 71B of the corresponding screw 70. When the inverter box 60 is lowered as indicated by the arrow b in the figure and the shaft portion 71A of the screw 70 corresponding to the small diameter portion 67A of each insertion hole 66 is inserted from below, the inverter box 60 has three pieces. It will be in the state supported by the screw 70. Finally, the screws 70 are finally tightened to fix the mounting plate 65 to the fixed plate 75, that is, the inverter box 60 is fixed to the front surface of the fixed plate 75 as shown in FIG.

  When the inverter box 60 is attached in this way, the inverter box 60 is housed in the upper chamber 38U in a state where the inverter box 60 penetrates the partition plate 35 and the lower side faces the lower chamber 38D. In other words, the inverter box 60 is disposed on the right side of the electrical box 57 with at least the front side facing the front opening of the upper chamber 38U. Therefore, if the operation panel 58 is removed, the inverter box 60 is maintained. Such operations can be performed from the front side.

  Furthermore, the inverter box 60 can be removed to the front side of the upper chamber 38U relatively easily as follows. The screw 70 is loosened from the mounting state shown in FIG. 11, and then the inverter box 60 is lifted along the fixing plate 75 as shown by the arrow c in FIG. 11, so that the large diameter portion 67 </ b> B of the insertion hole 66 is The head portion 71B of the screw 70 is pulled out from the insertion hole 66 by pulling forward as shown by the arrow d in accordance with the head portion 71B. From this state, as shown by an arrow e in FIG. 12, the upper side of the inverter box 60 is tilted forward while the lower side is extracted from the through hole 72 into the upper chamber 38U, and the inverter box 60 is kept in a substantially laid posture. It is possible to pull out from the front opening.

That is, according to the present embodiment, the inverter box 60 is housed in the upper chamber 38U in a state where the inverter box 60 penetrates the partition plate 35 and the lower side faces the lower chamber 38D. Work can be performed from the front side, and an increase in the space of the upper chamber 38U, that is, the machine room 11, is also avoided.
Further, since the fixing plate 75 is mounted between the outer bottom surface (the bracket 80) of the main body 10 and the partition plate 35 integral with the chassis 30, the structural reinforcement of the chassis 30 and thus the machine room 11 is provided. It becomes effective.

Since the inverter box 60 can be attached to and detached from the fixed plate 75 from the front opening of the upper chamber 38U as described above, the attachment work and the removal work during maintenance can be easily performed.
Since the mounting plate 65 for screwing the inverter box 60 to the fixing plate 75 is integrally formed with the back plate 62 of the inverter box 60, the number of parts can be reduced. Further, since the inverter box 60 is provided with a through hole 68 on its peripheral surface so that hot air does not accumulate inside, it is effective in thermally protecting a stored inverter or the like.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) The mounting plate screwed to the fixing plate provided in the inverter box may be formed separately from the inverter box and attached later.
(2) The fixing plate does not necessarily need to be provided between the outer bottom surface of the main body and the partition plate, and may be suspended from the outer bottom surface of the main body or conversely standing on the partition plate.
(3) In fixing the inverter box at a fixed position in the machine room, as exemplified in the above embodiment, the fixing is not limited to the front face of the fixing plate and screwed, and other fixing means may be employed. .
(4) The inverter box may have a structure in which through holes are not opened on the peripheral surface thereof.

(5) The cooler and the cooling fan may not be unitized, and a cooler chamber may be provided on the side of the storage chamber and individually assembled therein.
(6) The present invention is not limited to one in which the machine room is disposed below the refrigerator main body, but can be applied to one provided adjacent to another direction such as a side.
(7) The present invention is not limited to the quick cooler illustrated in the above embodiment, but is a heat insulating box provided with a storage chamber for an object to be cooled and a cooler and a cooling fan for circulating and supplying cold air to the storage chamber. The present invention can be widely applied to all refrigerators in which a machine room is provided adjacent to a body-made refrigerator main body.

The perspective view of the state which removed the heat insulation door of the quick-cooling warehouse which concerns on one Embodiment of this invention. Front view showing the internal structure Cross sectional view Perspective view showing the structure of the chassis of the machine room Side view showing the structure of the machine room Rear view of machine room Perspective view with a part of the inverter box omitted Front view of inverter box Perspective view of fixing plate Side sectional view of the inverter box before installation Side sectional view showing the mounting state Side sectional view explaining the removal operation

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Cooling body 11 ... Machine room 15 ... Storage room 16 ... Installation room 20 ... Cooling unit 21 ... Cooling device 22 ... Cooling fan 30 ... Chassis 31 ... Bottom plate 32 ... Column (frame) 35 ... Partition plate 38U ... Upper chamber 38D ... Lower chamber 40 ... Refrigerator 41 ... Condenser 42 ... Compressor 44 ... Front panel 46 ... Rear panel 48 ... Side panel 57 ... Electrical box 60 ... Inverter box 62 ... Rear plate 65 ... Mounting plate 66 ... Insertion hole 67A ... Small diameter Part 67B ... Large diameter part 68 ... Through hole 70 ... Screw 71A ... Shaft part 71B ... Head 72 ... Through hole 75 ... Fixing plate 77 ... Screw hole 80 ... Bracket 83 ... Screw

Claims (6)

Cooling in which a machine room is provided adjacent to a cooler body made of a heat insulating box having a storage room for storing an object to be cooled and a cooler and a cooling fan for circulating and supplying cold air to the storage room. In the warehouse
The machine room is partitioned into an upper chamber and a lower chamber by a horizontal partition plate extending inside, and the lower chamber includes a compressor and an air-cooled condenser, and is circulated and connected to the cooler for freezing. In the refrigeration apparatus constituting the circuit, electrical boxes are housed in the upper chambers ,
The electrical box is arranged in the left or right region of the upper chamber when the upper chamber is viewed from the front of the refrigerator.
In the partition plate, when the upper chamber is viewed from the front of the cooler, a through hole is opened on a side different from the installation position of the electrical box, and an inverter for controlling the number of rotations of the cooling fan Etc., and an inverter box having a height dimension larger than that of the electrical box is disposed from the upper chamber to the lower chamber while penetrating the through hole. Refrigerator.   The machine room is formed into a box shape with an upper surface opening by stretching a panel on a chassis formed by assembling a plurality of frames, and the cooling body is placed on the upper surface of the machine room, The refrigerator according to claim 1, wherein a fixing plate for fixing the inverter box is provided between the outer bottom surface of the refrigerator main body and the partition plate.   The fixing plate is provided facing the front so as to be along the inner edge of the through hole, and is screwed to the fixing plate from the left and right side edges of the back of the inverter box. 3. The refrigerator according to claim 2, wherein the mounting plate is formed to project.   The refrigerator according to claim 3, wherein the mounting plate is formed integrally with a back plate constituting the inverter box.   The refrigerator according to any one of claims 1 to 4, wherein an operation panel that is removable with respect to the upper chamber is disposed in front of the upper chamber.   The through hole is formed in a square hole shape having a width substantially equal to the width of the inverter box and a depth larger than the depth dimension of the inverter box, and is opened at a position corresponding to the back end side of the electrical box. The refrigerator according to any one of claims 1 to 5, wherein the refrigerator is provided.

Images