JP3383729B2 - Storage room - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warm air circulation type warm storage, and more particularly to a warm storage having an improved structure for arranging a temperature detecting means for detecting an excessive temperature rise in the heating chamber. Regarding

[0002]

2. Description of the Related Art An example of a conventional structure of a warm air circulating portion in a hot storage of this type will be described with reference to FIG. A heating chamber 81 and a heating chamber 83 are provided outside the heating chamber 81 via a partition plate 82. A wagon 84 for accommodating, for example, trays on which items to be heated are placed side by side is placed in the heating chamber 81.
In one heating chamber 83, a heating body assembly 86 provided with a plurality of heating bodies 85 (sheath heaters) is attached to the inner surface of the side wall 88 via a mounting plate 87. Then, when the fan 89 is rotated, the air in the heating chamber 81 is drawn through the through hole 91 formed in the ceiling plate 90 and blown onto the heating body 85, as shown by the thin solid arrow a. ,
After being converted into warm air, as shown by the thick solid arrow b,
From the wind window 92 formed on the partition plate 82 to the heating chamber 81
Supplied within. The temperature in the heating room 81 is 9
When the temperature is detected by 3 and is raised to the set temperature, the temperature of the room is controlled by stopping the energization of the heating body 85 while continuing the rotation of the fan 89.

During the above heating operation, the heating element 85 is usually 2
When the fan 89 stops rotating due to some reason during the heat generation, the temperature of the air around the heating member 85 is excessively increased and the fan 89 and the side wall 88 are filled with the heat. The heat insulating material 94 may be adversely affected. For this purpose, a heating chamber thermostat 95 for detecting the temperature of the heating chamber 83 is provided, and means is provided for cutting off the power supply to the heating body 85 when the detected temperature exceeds a certain temperature.

[0004]

By the way, in the conventional heating chamber thermostat 95, as shown in FIGS. 7 and 8, the temperature sensing portion 96 is provided at the corner of the mounting plate 87 to which the heating body assembly 86 is mounted. The structure is such that the mounting plate 87 is mounted in close contact with the mounting plate 87 via the bracket 97, and the temperature of the mounting plate 87 heated by the heating body 85 is detected. That is, the temperature in the vicinity of the heating body 85 is indirectly transmitted to the heating chamber thermo 95 via the mounting plate 87, and the heat is radiated from the mounting plate 87 during that time, so the reaction speed is slow, and In some cases, it took a long time, such as several tens of minutes or more, after the fan 89 was stopped and before the heating chamber thermostat 95 was activated to cut off the power supply to the heating body 85. In order to improve the reaction speed, it is conceivable to dispose the heating chamber thermo 95 on the mounting plate 87 as close as possible to the heating body 85, but there is a possibility that the wiring may be damaged by radiant heat, and there is a limit to that. there were. The present invention was completed in view of the above circumstances, and it is an object of the present invention to quickly detect an excessive temperature rise in a heating chamber.

[0005]

As a means for achieving the above object, the invention of claim 1 circulates warm air heated by a heating element provided in the heating chamber into the heating chamber by a fan. supplies, in a heating cabinet having a temperature detection means for detecting this when the heating chamber is excessively heated, the upper portion of said temperature sensing means and said fan within said heating chamber <br/> Arranged , and the temperature detection means and the fan
It is characterized by the fact that the space between and is separated by a wall plate . With this configuration, the heat of the heating element is quickly transmitted to the temperature detecting means by using the air having a high heat transfer coefficient as a medium and riding the upward flow. Also, if the fan is operating,
Blown air does not hit the temperature detection means.

[0006]

According to a second aspect of the present invention, in the first aspect of the present invention, a mounting plate is disposed above the heating chamber with a gap between the heating chamber and the ceiling wall, and the temperature detecting means is provided on the mounting plate. Is characterized in that it is provided with. In this configuration, the mounting plate prevents the heat that should hit the temperature detecting means from escaping, and the provision of the gap prevents the heat from reaching the heat insulating material of the ceiling wall and the wiring passing through the gap. It

[0008]

According to the invention of claim 1 according to the present invention, obtained reaction may rapidly detect it when the heating chamber is excessively heated, or
Moreover, there is an effect that the hot air can be efficiently circulated and supplied during the normal operation. According to the invention of claim 2 , in addition to the above effects, there is an effect that an excessive temperature rise can be detected more quickly, and that the heat insulating material and wiring of the ceiling wall can be effectively protected.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment in which the present invention is applied to a hot and cold distribution vehicle will be described below with reference to FIGS.
First, the outline of the structure of the hot / cold distribution vehicle according to the present embodiment will be described with reference to FIG. The hot and cold serving vehicle 1 is provided with a greenhouse holding body 2 which is configured in a rectangular box shape as a whole, and a machine room 11 is provided on the upper surface and a plurality of casters 3 for moving are provided on the bottom portion. A handle 4 is provided on the side surface. The greenhouse greenhouse 2 is open on both front and rear sides, and is configured as a heat insulating box body in which a ceiling wall, a bottom wall, and left and right side walls are filled with a heat insulating material such as urethane foam. A hollow intermediate wall 5 is provided at the center of the greenhouse housing body 2, whereby two wagon storage chambers 6 on the left and right are formed inside, and a door 8 is provided on the front and back of each wagon storage chamber 6.
Is openable and closable.

The respective wagon accommodating chambers 6 are symmetrically provided, and a cooler (not shown) for generating cool air is disposed in the intermediate wall 5 described above, and the cool air is blown by the fans into the respective wagon accommodating chambers 6. Is circulated and supplied to a region closer to the intermediate wall 5 in. On the other hand, heating chambers 30 (see FIG. 2) are provided at positions outside the left and right wagon storage chambers 6, respectively, as will be described later in detail, and the warm air generated there is provided on the left and right side walls of each wagon storage chamber 6. It is designed to be circulated and supplied to the area closer to.

A wagon 13 provided with a shelf 15 for accommodating trays 12 made of plastic or the like on which foods are placed in a multi-tiered manner is accommodated in each wagon accommodating chamber 6 through wheels 17 so as to be drawn out. There is. The tray 12 is formed in a horizontally long rectangular shape, and food provided in a cold state is placed on one side of the boundary 12a provided at the substantially center of the horizontal width, and food provided in a warm state is placed on the other side. Placed. Wagon 13
Is provided with a heat insulating wall 16 so as to be partitioned into right and left, and each tray 12 can be placed on the shelf 15 while inserting the boundary portion 12a into the gap 16a provided in the heat insulating wall 16. Has become. And as mentioned above, the heat insulation wall 1
When the wagon 13 provided with 6 is accommodated in the wagon accommodating chamber 6, the wagon accommodating chamber 6 on the right side has the heating chamber 2 on the right side.
0 is a refrigerating chamber 21 on the left side, and the wagon accommodating chamber 6 on the left side is a refrigerating chamber 21 on the left side. Therefore, the hot food placed on one tray 12 is kept warm in the warm room 20 and the cold food is kept warm in the cold room 21, respectively.

Next, the structure of the heating chamber 20 and the warm air circulating portion will be described with reference to FIGS. Side wall 2 of the heating chamber 20
3 and the ceiling wall 24 are formed by filling the hollow shell 26 with the heat insulating material 27 as described above, and the ceiling wall 24 has a stepped shape in which the outer end near the side wall 23 is raised. Is formed in. A partition plate 29 is provided in parallel with the side wall 23 at a position that is inwardly of a certain size from the inner surface of the side wall 23.
In the meantime, the heating chamber 30 described above is configured. The partition plate 29 is provided with warm air generated in the heating chamber 30 in the heating chamber 2
A plurality of wind windows 31 for supplying into 0 are opened at appropriate intervals. Further, on the lower surface side of the raised portion of the ceiling wall 24, a ceiling plate 33 extending from the upper edge of the partition plate 29 to the lower surface of the ceiling wall 24 is stretched. A large number of through holes 34 are opened in the ceiling plate 33, and a suction chamber 35 for drawing air from the heating chamber 20 is configured between the ceiling plate 33 and the ceiling wall 24.

Next, the structure of the heating chamber 30 will be described. Side wall 2
As shown in FIG. 3, the inner surface of the space 3 extends from the position lower than the upper end by a certain dimension to the lower end side.
7 is attached. In the figure, reference numeral 38
Are the front and rear walls of the heating chamber 30 provided corresponding to the corner portions of the above-described greenhouse greenhouse body 2, and also the outer shell body 2
It is formed by filling a heat insulating material 27 in the inside 6. A heating element mounting plate 40 whose upper end reaches the lower surface of the ceiling wall 24 is attached to the central portion in the width direction of the upper end portion of the space forming plate 37. Therefore, a gap 41 is provided between the heating body mounting plate 40 and the inner surface of the side wall 23 on the back surface side.

A heating element assembly 42 is attached to the surface of the heating element mounting plate 40. In this heating element assembly 42, three heating elements 45, which are sheath heaters, are arranged between a pair of L-shaped brackets 43 in a horizontal posture with a vertical space therebetween, and the heating element assembly 42 has a structure in which both brackets 43 are A cover plate 46 is stretched between the projecting edges toward one side to form a vertical flow passage in the heating body assembly 42. In addition, the lid plate 4 of the heating body assembly 42
A gap is provided between 6 and the partition plate 29.

Outside the suction chamber 35 (left side in FIG. 2)
A fan 48 is provided at the end of the. Therefore, a wall plate 50 is stretched at a position inside the upper end of the heating element mounting plate 40 with a certain gap 49. This wall board 50
Is provided over the entire length in the depth direction of the heating chamber 30, and is provided so as to hang from the ceiling wall 24 by substantially the height of the suction chamber 35. On the other hand, a guide plate 52 is provided at a corner portion where the partition plate 29 and the ceiling plate 33 are connected. The guide plate 52 also has a length extending over the entire length in the depth direction of the heating chamber 30, and the suction chamber 35 is provided at the rear edge of the horizontal substrate 53 mounted and fixed on the end portion of the ceiling plate 33. A closing plate 54 that reaches almost the center height is formed to rise, and a suction port 55 is provided between the closing plate 54 and the ceiling wall 24. On the other hand, the tip end side of the substrate 53 projects to the vicinity of the drooping lower end of the wall plate 50, and an inclined plate 56 extending obliquely downward is formed on the projecting edge, and the drooping lower end of the wall plate 50 and the tilted plate. An air outlet 57 is provided between the air outlet 56 and the air outlet 56. The fan 48 described above is provided in the device space 58 provided between the wall plate 50 and the guide plate 52 so as to be rotationally driven in one direction.

In the above-mentioned heating chamber 20, a heating chamber thermostat 60 for controlling the temperature inside the heating chamber 20 is provided.
It is provided on the lower surface of the No. 3. On the other hand, in the heating chamber 30, two heating chamber thermos 62 for detecting the excessive temperature rise of the heating chamber 30 are provided. As shown in FIG. 4, the heating chamber thermostat 62 is provided with a temperature sensing portion 64 on the lower surface side of the main body portion 63, and the temperature sensing portion 6 is
4 has a structure in which mounting portions 65 are provided on both sides.
The thermo mounting plate 67 for mounting the heating chamber thermo 62 has a total length comparable to the lateral width of the heating body assembly 42 as shown in FIG. 3, and is formed in an L-shaped cross section as shown in FIG. ing. Two openings 69 are formed on one mounting surface 68 of the thermo mounting plate 67, and each heating chamber thermos 62 has a temperature sensing portion 64 at the opening 69.
In the posture of facing, the both mounting portions 65 are fixed by being fixed with screws 71.

As shown in FIG. 2, the thermostat mounting plate 67 to which the heating chamber thermostat 62 is fixed is attached to the lower end portion of the space 49 formed between the heating element mounting plate 40 and the wall plate 50, as shown in FIG. Has been. In detail, in a posture in which the mounting surface 68 on the side on which the heating chamber thermos 62 is mounted is horizontal at the lower end portion of the void 49, the mounting surface 72 on the other side is the heating body mounting plate 4
It is fixed by being applied to 0 and being stopped by a screw 73. Also, the mounting surface 68 on which the heating chamber thermo 62 is mounted
Closes the lower edge of the void 49. In addition,
The electric wire 75 drawn out from each heating chamber thermostat 62 is guided into the machine room 11 through the through hole 76 formed in the ceiling wall 24 from the void 49.

The present embodiment has the above-mentioned structure,
Next, the operation will be described. When the power is turned on, the heating element 4
5 is energized to generate heat and the fan 48 is rotated. As a result, the air in the heating chamber 20 is drawn from the through hole 34 formed in the ceiling plate 33 through the suction chamber 35 as shown by the thin solid arrow a in FIG. After being blown toward 45 and converted into warm air, it is circulated and supplied into the heating chamber 20 from the wind window 31 formed in the partition plate 29, as shown by the thick solid arrow b. The temperature inside the heating chamber 20 is detected by the heating chamber thermostat 60 provided on the ceiling plate 33, and when the temperature is raised to the set temperature, the power supply to the heating body 45 is stopped while the fan 48 continues to rotate. When the temperature drops, the energization of the heating element 45 is restarted, and the room temperature is controlled to a substantially constant set temperature.

Since the blower outlet 57 of the fan 48 is provided by the inclined plate 56 so as to be directed to the heating body mounting plate 40, most of the blown air is first directly directed to the heating body mounting plate 40. The heating element 45 is applied and reflected there.
Directed to. That is, the air blown out from the fan 48 is further heated by the heating element 45 from the state where it is preheated by heat exchange with the heating element mounting plate 40 in the heating state, so that it is efficiently heated to warm air. To be converted.

The fact that the air blown from the fan 48 is applied to the heating element mounting plate 40 to exchange heat as described above means that
The temperature rise of the heating element mounting plate 40 is reduced. Further, since the heating body mounting plate 40 itself is mounted via the gap forming plate 37 and the gap 41 is formed between the heating body mounting plate 40 and the side wall 23, it is difficult for the heat of the heating body mounting plate 40 to be transferred to the side wall 23. And therefore the insulation 27 of the side wall 23
Is prevented from adversely affecting. Further, the heating chamber thermos 62 is installed on the back surface side of the wall plate 50 that constitutes the outlet 57, and the air blown from the fan 48 is heated by the heating chambers thermos 62.
The hot air is efficiently circulated and supplied without hitting.

If the rotation of the fan 48 is stopped during the heating operation, the circulation of the air is stagnated, and the temperature of the vicinity of the heating body 45 may be excessively increased. However, fan 4
8 is stopped, the radiant heat of the heating element 45 is
As indicated by the broken line arrow c in FIG. 3, air having a high heat transfer coefficient is used as a medium, and the thermo mounting plate 67 is swiftly mounted on the rising flow.
It reaches the lower surface of the mounting surface 68 of No. 2 and is detected by the temperature sensing unit 64 of the heating chamber thermo 62 through the opening 69. This prevents the heating body 45 from being energized and prevents the heating chamber 30 from excessively rising in temperature, thereby preventing the heat insulating material 27 and the fan 48 from being adversely affected.

Further, since the mounting surface 68 of the thermo mounting plate 67 closes the lower end of the gap 49, the radiant heat that should hit the temperature sensing portion 64 is prevented from escaping and can be detected with good response. In addition, the main body 63 of the heating chamber thermo 62
Are housed in the void 49, and the drawn electric wire 75 is routed through the void 49, so that it is avoided that heat is applied to them.

As described above, according to the present embodiment, since the heating chamber thermostat 62 is provided above the heating body 45, the radiant heat of the heating body 45 is directly received and the heat does not escape. Is removed, the heating element 45
It is possible to quickly prevent the temperature in the vicinity from being sensed with good response and excessively raising the temperature of the heating chamber 30. Further, the thermostat mounting plate 67 to which the heating chamber thermostat 62 is attached and the ceiling wall 2
Since a space 49 is provided between the ceiling wall 2 and
The heat is prevented from being applied to the heat insulating material 27 of No. 4, the main body portion 63 of the heating chamber thermostat 62 housed in the space 49, and the electric wire 75 wired therethrough, and these are effectively protected. It Further, the heating chamber thermostat 62 is installed on the back surface side of the wall plate 50 near the fan 48, and when the fan 48 is operating, the air is blown from the heating chamber thermostat 6.
Therefore, the warm air is efficiently circulated and supplied during normal operation.

<Other Embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition to the above, various modifications can be made without departing from the scope of the invention. (1) The position at which the heating chamber thermo is provided is not limited to the position shown in the above embodiment, but may be provided at the following position. In FIG. 5, in the first modification, the heating chamber thermo 62a is
It is provided on the back surface side of the wall plate 50 that constitutes the air outlet 57 of the fan 48. In the second modified example, the heating chamber thermostat 62b.
Is provided at the hanging end on the front surface side of the wall plate 50. In the third modification, the heating chamber thermo 62c is the same as the fan 4
8 is provided at the projecting end on the surface of the inclined plate 56 that constitutes the blowout port 57. In the fourth modification, the heating chamber thermostat 62d is provided on the lower surface of the substrate 53 on the back surface side of the inclined plate 56. These heating chamber thermo 6
Since all of 2a to 62d are provided above the heating body 45, the temperature around the heating body 45 can be detected with good response. Also, heating chamber thermos 62a and 62d
With regard to (2), when the fan 48 is operating, the air is not blown and does not hinder the supply of warm air. (2) Further, the present invention is not limited to the hot and cold serving vehicle shown in the above-described embodiment, but can be widely applied to all warm air circulation type hot storage.

[Brief description of drawings]

FIG. 1 is an external perspective view of a hot and cold serving vehicle to which the present invention is applied.

FIG. 2 is a cross-sectional view of a warm air circulation portion according to an embodiment of the present invention.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a perspective view showing a mounting structure of a heating chamber thermostat.

FIG. 5 is a partial enlarged cross-sectional view showing various modifications of the mounting position of the heating chamber thermostat.

FIG. 6 is a partial cross-sectional view of a conventional example.

FIG. 7 is a front view showing a mounting position of the heating chamber thermostat.

FIG. 8 is an enlarged side view thereof.

[Explanation of Codes] 20 ... Heating Room 24 ... Ceiling Wall 27 ... Heat Insulating Material 29 ... Partition Plate 30 ... Heating Chamber 45 ... Heating Body 48 ... Fan 49 ... Void 50 ... Wall Board 62 ... Heating Room Thermo 64 ... Temperature Sensing Section 67 ... Thermo-mounting plate 69 ... Opening 62
a to 62d ... Heating chamber thermostat

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Sadayuki Hirate, 16th Hoshizaki Electric Co., Ltd., Sakaemachi South Building, Toyoake City, Aichi Prefecture (72) Inventor, Hiroaki Jinno 16th, Sakaemachi South Building, Toyoake City, Aichi Prefecture Hoshizaki Electric Machinery (56) References JP-A-5-126336 (JP, A) JP-A-4-222318 (JP, A) JP-A-58-160739 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47J 39/00-39/02 A47B 31/02 F24C 1/00 F24C 7/04-7/06

Claims (2)

(57) [Claims] 1. A temperature detection means for circulating and supplying hot air, whose temperature has been raised by a heating element provided in the heating chamber, into the heating chamber by means of a fan and detecting excessive heating of the heating chamber. in a heating cabinet having a said temperature sensing means and said fan is disposed at an upper portion in the heating chamber, and between said fan said temperature detecting means
The storehouse is characterized by being separated by wall boards . 2. A mounting plate is disposed above the heating chamber with a gap between the heating chamber and the ceiling wall, and the temperature detecting means is provided on the mounting plate. 1
The listed storage.