JP7454472B2 - Hot storage - Google Patents

Description

The technology disclosed herein relates to a hot storage.

2. Description of the Related Art Conventionally, there has been known a heating cabinet that can store cooked food in a state where it is served on tableware and heat it at a predetermined temperature. For example, in Patent Document 1, the refrigerator has a storage section that can accommodate a plurality of tableware, and ducts in which heater panels are arranged are provided on the left and right sides and back of the refrigerator, and these ducts are connected by a blower fan. A heating refrigerator is disclosed that has a configuration that allows air to be smoothly blown from above to below. According to this heating cabinet, it is stated that the air generated by the blower fan can be sent in a uniform amount to the storage section through the ducts on the side and rear sides, thereby making the temperature inside the storage section uniform.

Japanese Patent Application Publication No. 2007-021000

However, even in warm storages equipped with ventilation fans, the internal temperature tends to be higher in the lower part, and there is room for improvement.
The technology disclosed herein was developed based on these circumstances, and its purpose is to provide a hot storage that can suppress temperature unevenness inside the refrigerator and uniformly heat the refrigerator. .

Therefore, in order to solve the above-mentioned problems, the heating cabinet disclosed herein includes a heating cabinet body for accommodating objects to be heated, and a heating unit for heating the internal air of the heating cabinet body. We are prepared. The heating unit includes an inner duct disposed inside the heating refrigerator main body along a vertical direction with respect to a side wall of the heating refrigerator main body, and an inner duct surrounding the inner duct inside the heating refrigerator main body. an outer duct arranged along the vertical direction, a first heating means provided in the inner duct, a second heating means provided in the outer duct, and the refrigerator main body. an air blowing mechanism that sends inside air from above to below to the inner duct and the outer duct, the outer duct communicating the inside of the outer duct and the inside of the refrigerator main body. Equipped with ventilation holes.

In the above configuration, heating means are provided in each of the double ducts consisting of an inner duct and an outer duct, and the ducts are used as heating panels. Thereby, the heating area can be effectively expanded, and a hot storage with high internal air heating efficiency (heat exchange efficiency) can be realized. Moreover, the air flowing through the outer duct is sent into the refrigerator not only from the downstream end of the outer duct but also from the ventilation holes provided in the outer duct. As a result, it is possible to suppress the temperature unevenness caused by local heating of the lower part of the heated refrigerator, and to provide a heated refrigerator that can uniformly heat the inside of the refrigerator.

In one preferred embodiment, the heating chamber body includes a rectangular parallelepiped-shaped heating chamber that opens toward the front, and a door that opens and closes the opening of the greenhouse chamber. The outer duct is installed on the back wall, which is the side wall opposite to the opening, and includes a main body spaced apart from the back wall, and extends from both ends of the main body toward the back wall. A plurality of the ventilation holes are provided vertically in the main body and the side surface. In the above configuration, the outer duct is provided with ventilation holes in both the main body portion and the side surface portion in the vertical direction. Thereby, the occurrence of temperature unevenness in the hot storage is more suitably suppressed, and a hot storage that can heat the inside of the refrigerator more uniformly is provided.

In one preferred embodiment, the first heating means and the second heating means are each a cord heater, and the inner duct and the outer duct each include a main body part spaced apart from the side wall, and a main body part spaced apart from the side wall. and a side surface extending from both widthwise ends of the main body toward the side wall, and the cord heater is disposed on a surface of the main body facing toward the side wall. The blowing mechanism includes a cross-flow type fan that flows air in a direction transverse to the rotation axis of the drum-shaped rotor blade. According to the above configuration, since the air inside the refrigerator is circulated by a cross-flow type fan, it is possible to blow air with a larger air volume and with lower static pressure than when using a propeller fan, blower, etc. . As a result, the air heated by the heating unit can be efficiently circulated inside the refrigerator while preventing the food stored in the refrigerator from drying out. As a result, a hot storage with excellent heating efficiency and hot storage efficiency is provided.

In a preferred embodiment, the inner duct and the outer duct are each made of aluminum or an aluminum alloy. Since aluminum or aluminum alloy has high thermal conductivity and is relatively lightweight, it is possible to efficiently propagate the heat generated by the first heating means and the second heating means to the inner duct and the outer duct. , the double duct can be made lighter. Thereby, the heating efficiency of the air inside the hot storage can be further increased, and the weight of the hot storage can be reduced.

In a preferred embodiment, the heating refrigerator is provided with a wind direction plate extending toward the outer duct on a surface of the inner duct facing the outer duct. According to the above configuration, the downward flow of air inside the outer duct can be changed to the direction toward the plate surface of the outer duct. Thereby, the contact efficiency between the outer duct and the air can be increased, and the air flowing inside the outer duct can be efficiently sent into the refrigerator from the ventilation hole. As a result, the heating efficiency and circulation efficiency of the air within the refrigerator can be further increased, and temperature unevenness within the refrigerator can be suitably suppressed.

In a preferred embodiment, the heating refrigerator includes a temperature detection means for detecting the temperature of the inside air, and a control device for controlling the operation of the heating unit. The control device controls the first heating means and the second heating until the temperature of the inside air detected by the temperature detection means reaches a first temperature lower than a preset warming temperature. The means is continuously operated, and after the temperature of the inside air detected by the temperature detection means reaches the first temperature, the inside air is heated stepwise by a predetermined temperature range. The first heating means and the second heating means are configured to operate intermittently. In a hot storage, for example, when the heating temperature is high, a situation may occur where the first and second heating means are significantly more heated than the air (inside air) inside the refrigerator. According to the above configuration, after the temperature inside the refrigerator reaches, for example, the first temperature at which a discrepancy between the temperature of the heating means and the temperature inside the refrigerator easily occurs, the first and second heating means are operated intermittently. The temperature inside the refrigerator can be increased by a predetermined temperature range. Thereby, the deviation between the temperature of the heating means and the temperature inside the refrigerator can be suppressed. As a result, for example, it is not necessary to set the heat resistant temperature of the heating unit excessively high, and the durability of the heating unit can be improved. Furthermore, in a heating refrigerator equipped with a safety device (for example, an overheating prevention device such as a thermostat), it is possible to prevent the safety device from malfunctioning.

In a preferred embodiment, the hot storage includes a temperature detection means for detecting the temperature of the inside air, a time measurement means, a notification means, and a control device. The control device uses the timer to measure the elapsed time since heating of the inside air is started by at least one of the first heating means and the second heating means, and uses the temperature detection means to measure the time elapsed since heating of the inside air is started by at least one of the first heating means and the second heating means. When the temperature of the inside air is detected and the elapsed time reaches a predetermined set time, if the detected temperature of the inside air has not reached the predetermined set temperature, the first heating means is activated. and a configuration in which it is determined that at least one of the second heating means is malfunctioning, and the malfunction is notified by the notifying means. According to the above configuration, a failure of the first and second heating means can be automatically detected and promptly notified to the user. As a result, in the event that the first and second heating means malfunction due to wire breakage, etc., the user can quickly grasp the situation and take immediate action against the malfunction of the first and second heating means. This is preferable because it makes it possible to do so.

In one preferred embodiment, the hot storage includes a clock means, a notification means, and a control device. The control device is configured such that when the elapsed time measured by the timer reaches a preset first time, the notification means notifies the arrival of the first time. According to the above configuration, for example, when the user places the cooked food in the heating chamber, the timer starts timing, and thereby the heating time of the food reaches the predetermined first time. will be promptly notified to the user, etc. Thereby, for example, when performing hygiene management according to HACCP, it is possible to easily carry out appropriate temperature control of cooked foods.

In a preferred embodiment, the notification means is at least one selected from the group consisting of a display device, a warning light, and an alarm. The above configuration is suitable because it is possible to adopt a notification mode suitable for the user who uses the hot storage.

According to the technology disclosed herein, it is possible to provide a hot storage that can suppress temperature unevenness inside the refrigerator and uniformly heat the inside.

A perspective view of a hot storage according to Embodiment 1 Cross-sectional view along the side of the hot storage (A-A cross-sectional view in Figure 1) Cross-sectional view along the front of the hot storage (BB cross-sectional view in Figure 1) A sectional view of the main parts along the top surface of the hot storage (CC sectional view in Figure 1) Perspective view of outer duct and outer heater Rear view of outer duct and outer heater Perspective view of inner duct and inner heater Rear view of inner duct and inner heater Rear view of upper and lower doors A cutaway perspective view of the packing according to Embodiment 1 A sectional view of the main parts along the top of the refrigerator (DD sectional view in Figure 1) Perspective view of main parts of upper and lower doors Cross-sectional view of main parts of the upper door and lower door (EE-E cross-sectional view in Figure 9) A perspective view of a packing support member according to Embodiment 1 A sectional view of a main part of a heating unit in which a wind direction plate according to Embodiment 2 is installed Front view of main parts of a heating unit (back wall) in which a wind direction plate according to Embodiment 2 is installed Front view of main parts of a heating unit (inner duct) in which a wind direction plate according to Embodiment 2 is installed Graph showing the state of temperature control of the hot storage according to Embodiment 3 Failure detection flow of heater in hot storage according to Embodiment 4 Flow of failure detection of heater in hot storage according to Embodiment 5 Front view showing the operation panel of the hot storage according to Embodiment 6 A perspective view of a packing support member according to Embodiment 7 Rear view of the upper door and lower door of the heating cabinet according to Embodiment 8 Enlarged view of main parts in Figure 23 Main part sectional view of upper door and lower door (FF sectional view in Figure 24) Schematic diagram of packing according to Embodiment 8 (A) Schematic cross-sectional view and (B) front view showing what happens when the upper and lower packings are inserted incorrectly (twisted) (A) Schematic cross-sectional view and (B) front view of the upper and lower doors of the hot storage according to Embodiment 9 Schematic diagram of packing according to Embodiment 10 A perspective view showing the state of the packing according to Embodiment 10 when the door is closed. Schematic diagram of packing according to Embodiment 11 Schematic diagram of packing according to Embodiment 12 Schematic diagram of packing according to Embodiment 13 Schematic diagram of packing according to Embodiment 14 (A) A schematic cross-sectional view of an upper door and a lower door and (B) a perspective view of a packing according to Embodiment 15 (A) Schematic cross-sectional view and (B) front view of the upper door and lower door according to Embodiment 16 (A) Schematic cross-sectional view and (B) front view of the packing (A) A schematic cross-sectional view of an upper door and a lower door and (B) a perspective view of a packing according to Embodiment 17 (A) A schematic cross-sectional view of an upper door and a lower door and (B) a perspective view of a packing according to Embodiment 18 (A) A schematic cross-sectional view of an upper door and a lower door and (B) a perspective view of a packing according to Embodiment 19 (A) Schematic cross-sectional view and (B) front view of an upper door and a lower door according to Embodiment 20 Schematic cross-sectional diagrams of the upper door and the lower door when (A) opening and closing and (B) closing the door according to Embodiment 21 Schematic cross-sectional diagrams of the upper door and the lower door when (A) opening and closing and (B) closing the door according to Embodiment 22 Schematic cross-sectional diagrams of the upper door and the lower door when (A) opening and closing and (B) closing the door according to Embodiment 23 Schematic cross-sectional diagrams of the upper door and the lower door according to Embodiment 24 (A) when opened/closed and (B) when closed A perspective view of a telescoping member according to Embodiment 24 Schematic cross-sectional diagrams of the upper door and the lower door when (A) opening and closing and (B) closing the door according to Embodiment 25 Cross-sectional schematic diagrams of the upper door and the lower door when (A) opening and closing and (B) closing the door according to Embodiment 26 A perspective view of a hot storage room of a hot storage according to Embodiment 26 Schematic cross-sectional diagrams of the upper door and the lower door when (A) opening and closing and (B) closing the door according to Embodiment 27 (A) Schematic cross-sectional view and (B) rear view of the sealed structure of the upper door and lower door according to Embodiment 28 In the upper door and lower door sealing structure according to Embodiment 28, cross-sectional schematic diagrams illustrating the state of the sealing plate in (A) to (F) when the upper door and the lower door are opened and closed in various ways.

The technology disclosed herein will be described with reference to the drawings as appropriate. Note that the symbols F, Rr, L, R, U, and D shown in each figure represent the front, rear, left, and right in the width direction (left-right direction), respectively, when the door 30 of the hot storage 1 is in front. It shows the upper and lower sides in the vertical direction (vertical direction). However, the above-mentioned direction is only determined for convenience and should not be interpreted in a limited manner.

≪Embodiment 1≫
[Warm storage]
The hot storage 1 according to the present embodiment is a transport vehicle (so-called hot storage vehicle) equipped with heat-retaining equipment, which is capable of storing high-temperature food after cooking, for example, and is movable for serving, etc. cart). The heating chamber 1 is heated to a temperature range of 65°C or higher, which is one of the control temperatures for food after cooking in the "Hygiene Management Manual for Mass Cooking Facilities" published by the Ministry of Health, Labor and Welfare, where most bacteria are killed, for example. '', for example, 65 to 95 degrees Celsius). As shown in FIGS. 1 to 3, this hot storage 1 has an approximately rectangular parallelepiped shape as a whole, and is mainly composed of a hot storage main body 10 that generally constitutes a heating space, and a machine room 5 that serves as a heating space. It is arranged above the refrigerator main body 10, and the four corners of the refrigerator main body 10 are supported from below by four casters 7. Each component will be explained below.

The hot storage body 10 has a box-like shape with an open front, and includes a hot storage chamber 11 that can store food to be heated inside, and a door 30 that opens and closes the opening of the hot storage chamber 11. have. In the hot storage main body 10, by covering the opening of the hot storage chamber 11 with the door 30, a hot storage space can be constructed inside thereof. The hot storage room 11 and the door 30 have a hollow structure made of metal plates such as stainless steel, and are filled with a heat insulating material such as glass wool to create a hot storage space (hereinafter simply referred to as the inside). ) can be insulated from the outside. The door 30 of the hot storage 1 of this embodiment is composed of two doors 30, an upper door 31 and a lower door 32, and these two doors 31 are arranged above and below one opening of the hot storage 11. , 32 can be opened and closed independently. By opening and closing one opening with the two doors 31 and 32, it is possible to suppress fluctuations in temperature inside the refrigerator and to take objects to be kept into and out of the greenhouse 11.

A pair of upper and lower hinge mechanisms 31D, 32D are attached to the doors 31, 32 on their left side surfaces 31B, 32B. Furthermore, hinge mechanisms 31D and 32D are attached to the greenhouse chamber 11 at positions corresponding to the upper door 31 and the lower door 32 on the left side 11B of the opening edge (periphery of the opening). Each of the doors 31 and 32 can swing open and close relative to the greenhouse chamber 11 using the hinge mechanisms 31D and 32D as swing axes. Each door 31, 32 is provided with a packing 34 for ensuring airtightness with the greenhouse chamber 11. The configuration of the packing 34 will be explained in detail later. Further, as shown in FIG. 1, the doors 31 and 32 are provided with handles 33 on the right side surfaces 31C and 32C at positions closer to the center in the vertical direction of the greenhouse 11. A magnet (not shown) with a high attraction force is attached to the right side 11C of the opening edge of 11 facing the handles 33. With this configuration, when the upper door 31 and the lower door 32 are each closed, the handles 33 are strongly attracted to the opening edges of the greenhouse chamber 11, so that the upper door 31 and the lower door 32 are tightly sealed. Furthermore, when opening the upper door 31 or the lower door 32, by tilting the handle 33 of the corresponding door toward you, the upper door 31 or the lower door 32 can be released from being fixed by magnetic attraction by the reaction of the lever. There is.

The greenhouse 11 includes an upper wall 12A, a pair of left and right walls 12B and 12C, a back wall 12D, and a bottom wall 12E. The left side wall 12B, the right side wall 12C, and the back wall 12D are examples of side walls in the present technology. As shown in FIGS. 2 and 3, a tray receiving structure 20 made of metal such as stainless steel or aluminum alloy is provided inside the refrigerator. The tray support structure 20 is roughly composed of a shelf post 21 and a tray guide 23 (shelf support), and a tray 25 (on which cooked food and tableware are placed) is placed in the greenhouse 11. It is possible to place a single shelf (shelf board) or multiple shelves arranged vertically. Specifically, one shelf pillar 21 is fixed to the left side wall 12B and the right side wall 12C in the greenhouse 11, one in front and one in the rear. The shelf pillar 21 is provided with a plurality of locking holes 21A at predetermined intervals in the vertical direction, and by locking the front and rear locking claws 23A of the tray guide 23 in the locking holes 21A, the left side wall In each of the tray guide 12B and the right side wall 12C, the tray guide 23 is removably attached to the front and rear shelf pillars 21 in a substantially horizontal position and protrudes toward the center in the width direction. There is. A pair of tray guides 23 are installed at the same height of the left and right shelf pillars 21, and one tray 25 (for example, a hotel pan) is placed approximately horizontally on top of this pair of tray guides 23. It can be placed on.

[Heating unit]
A heating unit 40 is provided at the rear of the greenhouse 11. As shown in FIGS. 2 and 4, the heating unit 40 roughly includes an inner duct 41, an inner heater 42 (an example of a first heating means), an outer duct 43, and an outer heater 44 (an example of a second heating means). example) and a fan 46 (an example of a ventilation mechanism). Of the heating unit 40, the ducts 41, 43 and the heaters 42, 44 are arranged inside the greenhouse 11, but the fan 46 is installed inside the greenhouse 11 by entering the machine room 5. It is arranged in a fan room 47 defined above. Each part of the heating unit 40 will be explained below.

The inner duct 41 and the outer duct 43 are formed by bending a long aluminum alloy plate into a substantially U-shaped cross section, and form main bodies 41A, 43A and side surfaces extending from both ends of the main bodies 41A, 43A to face each other. 41B and 43B. The outer duct 43 is configured to have larger dimensions than the inner duct 41 in the width direction, the vertical direction, and the front-rear direction, and the inner duct 41 is larger than the inner duct 41 with respect to the refrigerator side surface of the back wall 12D. The outer duct 43 is the inner side, and the U-shaped bulges (in other words, the longitudinal direction of the main body parts 41A, 43A and the side parts 41B, 43B) are spaced apart from each other so that they are along the upper and lower rear. Fixed. Thereby, the heating unit 40 has a first air flow path F1 between the back wall 12D and the inner duct 41 and a second air flow path between the inner duct 41 and the outer duct 43 along the vertical direction. A flow path F2 is formed.

As shown in FIGS. 5 and 6, the inner duct 41 is provided with an inner heater 42 on the side facing the back wall 12D (hereinafter referred to as the "back surface"). The inner heater 42 of this example is a so-called silicone cord heater (an example of a cord heater) in which a lead wire (copper wire) is coated with silicone rubber, and one is arranged on the right side and one on the left side of the inner duct 41. There is. The inner heater 42 is arranged in a meandering manner so as to extend parallel to the vertical direction in each of the right and left parts of the inner duct 41, and is fixed to the back surface of the inner duct 41 with an aluminum foil tape. Both ends of the inner heater 42 are arranged upward, and are electrically connected to a control device 100 provided in the machine room 5, which will be described later, and can also be connected to an external power source (not shown). The inner duct 41 also serves as a heater panel that supports the inner heater 42.

A plurality of elongated ventilation holes 41C for ventilating the inside and outside of the inner duct 41 are formed through the side surface 41B of the inner duct 41 and spaced apart from each other. A plurality of ventilation holes 41C are arranged in the left and right side surfaces 41B in the vertical direction, and in the inner duct 41 of this example, two ventilation holes are arranged in the front and rear directions and two in the vertical direction in each side surface 41B. A total of 34 ventilation holes 41C, 17 of which are arranged. No ventilation hole 41C is formed in the main body 41A of the inner duct 41, and an opening 41D for attaching a thermostat 45, which will be described later, is formed in the upper part at the center between the attachment points of the two inner heaters 42. has been done.

The thermostat 45 is a bimetallic temperature regulator, and its heat sensitive part is disposed between the main body 41A of the inner duct 41 and the main body 43A of the outer duct 43 through the opening 41D of the inner duct 41. , is fixed to the back wall 12D. This thermostat 45 constitutes a B contact in the power supply circuit to the inner heater 42 and the outer heater 44, and although it is normally in the energized state (ON), the ambient temperature remains at a predetermined set temperature (for example, 95°C). ), the contacts open and the supply of power to the inner heater 42 and outer heater 44 is cut off (OFF). Thereby, abnormal overheating of the inner heater 42 and the outer heater 44 can be prevented. Although not limited to this, the thermostat 45 of this example is of a manual reset type that is manually reset after the user confirms safety when the thermostat 45 becomes open at a predetermined set temperature (operating temperature) or higher. ing.

As shown in FIGS. 7 and 8, the outer duct 43 is provided with an outer heater 44 on the side facing the back wall 12D (hereinafter referred to as the "back surface"). The outer heaters 44 are so-called silicone cord heaters in which lead copper wires similar to those of the inner heater 42 are coated with silicone rubber, and one each is arranged on the right side and the left side of the outer duct 43. The outer heater 44 is arranged in a meandering manner so as to extend parallel to the vertical direction in each of the right and left parts of the outer duct 43, and is fixed to the back surface of the outer duct 43 with an aluminum foil tape. Both ends of the outer heater 44 are arranged upward and are electrically connected to the control device 100, and can also be connected to an external power source (not shown). The outer duct 43 also serves as a heater panel that supports the outer heater 44.

In addition, the main body 43A and the side surface 43B of the outer duct 43 are provided with a plurality of elongated vent holes 43C spaced apart from each other to allow ventilation between the inside and outside of the outer duct. The main body 43A has vent holes 43C arranged vertically at the left and right ends and the center, except for the attachment of the outer heater 44. In the center, an inspection hole 43D is provided instead of the vent hole 43C at a position corresponding to the front of the thermostat 45. The inspection hole 43D is detachably covered from the front by a cover member 43E made of an aluminum alloy plate material. The left and right side surface portions 43B each have a plurality of vent holes 43C arranged vertically. As shown in FIG. 2, the vent holes 43C in the side surface portion 43B of the outer duct 43 and the vent holes 41C in the side surface portion 41B of the inner duct 41 are arranged at positions slightly offset in the height direction. The number of ventilation holes 43C is smaller in the lower part of the side portion 43B than in the upper part. For example, in the outer duct 43 of this example, the upper part of one side portion 43B has 5 ventilation holes 41C in the front-to-rear direction and 9 ventilation holes in the up-to-down direction, for a total of 45 ventilation holes 41C, while the lower part has 3 ventilation holes 41C in the front-to-rear direction and 9 ventilation holes in the up-to-down direction, for a total of 27 ventilation holes 41C, at a position equivalent to the front three rows in the upper part.

As shown in FIG. 2, the lower end of the inner duct 41 is arranged above the lower end of the outer duct 43, and the first air flow path F1 is located below the inner duct 41, and the second The air flow path F2 is merged with the air flow path F2. The lower end of the outer duct 43 is arranged below the tray guide 23 attached to the lowest stage of the tray receiving structure 20, and a relatively narrow gap is formed between the lower end of the outer duct 43 and the bottom wall 12E. ing. With this configuration, the second air flow path F2 and the first air flow path F1 are communicated with the inside of the refrigerator through the gap (air outlet) between the lower end of the outer duct 43 and the bottom wall 12E. .

As shown in FIG. 2, the fan room 47 is provided so as to penetrate the upper wall 12A at the rear center portion of the upper wall 12A and project upward between the upper wall 12A and the back wall 12D. An air intake port 47A is formed on the lower surface of the fan room 47 so that air inside the refrigerator can be taken into the fan room 47. The fan room 47 is equipped with a thermistor 48 (an example of temperature detection means) above the intake port 47A, and is configured to detect the temperature of the internal air taken into the fan room 47 and send it to the control device 100. It has become. Further, the fan room 47 is provided with two cross-flow type fans as the fans 46. However, the number of fans may be one. The fan 46 is electrically connected to the control device 100 and can be connected to an external power source (not shown).

Cross-flow type fans are called cross-flow fans, once-through fans, line flow fans (registered trademark), cross-flow fans, tangential fans, etc., and are drum-shaped with uniform blades in the axial direction. By rotating the rotary blade (impeller) held within the case, air from one side (intake port) is drawn into the gap between the blades (sucked), and the air is drawn across (crossed) the axis of rotation. It is configured to allow air to flow through the air outlet, and expel air from the gap between the blades on the other side (exhaust port). This cross-flow type fan 46 has lower static pressure and less operating noise than, for example, an axial-flow type fan represented by a propeller fan, or a wide-flow type fan represented by a blower, sirocco fan, etc. It is characterized by being small, flat, and easy to form soft airflow. In addition, in this type of hot storage, a circulation fan is installed to keep the temperature inside the refrigerator uniform, but cooked food is exposed excessively to high-temperature airflow without being covered. This can cause problems such as drying of the surface and loss of taste and flavor. The heating cabinet 1 disclosed herein uses a cross-flow type fan 46 to gently circulate the air inside the refrigerator at a low static pressure, so that it is possible to dry and ventilate food stored in the refrigerator without using a cover or the like. It is possible to suitably suppress the deterioration of quality due to Although not limited thereto, the fan 46 may be, for example, a fan with a maximum static pressure of 20 Pa or less, preferably 10 Pa or less.

The two fans 46 are each installed so that their rotational axes extend along the width direction. Among these fans 46, the fan disposed relatively to the rear is referred to as a first fan 46A, and the fan disposed relatively to the front is referred to as a second fan 46B. The intake ports I1 and I2 of these fans 46A and 46B are both arranged in the fan room 47, and the exhaust ports O1 and O2 are located between the inner duct 41 and the back wall 12D (for the first fan 46A). That is, the second fan 46B is connected between the outer duct 43 and the inner duct 41 (that is, the second air flow path F2). By driving these fans 46, the air inside the warehouse is sucked into the fan room 47 through the intake port 47A, and the air is drawn into the first air flow path F1 and the second air flow path F2 in the ducts 41 and 43. It is now possible to send it to.

As shown in FIGS. 2 and 3, the machine room 5 is arranged above the refrigerator main body 10, houses the control device 100 in front of it, and houses a part of the heating unit 40 (fan Room 47) is located. Specifically, the machine room 5 includes a front panel 5A, a pair of side panels 5B, a rear panel 5C, a bottom panel 5D, and a top panel 5E, and these panels are connected in a box shape. ing. The front panel 5A is formed in a substantially U-shape so that the front panel 5A corresponds to the door 30 disposed in front of the greenhouse 11 when viewed from above.

As shown in FIG. 1, an operation panel 150 is installed on the front right side of the front panel 5A. The operation panel 150 includes, for example, a display section 152 that can display status information of each part of the hot storage 1, operating conditions of the hot storage 1, etc., and provides instructions and settings for various operations of the hot storage 1. An input section 154 and the like are provided for this purpose. The display unit 152 in this example is a 7-segment display, and is configured to display numbers and alphabets in a 7-segment display format according to instructions from the control device 100. The display unit 152 is an example of a notification means in the present technology. The input unit 154 is a user interface used by the user to input instructions to the control device 100, and the input unit 154 in this example is configured with operation buttons, for example.

Further, as shown in FIG. 1, a main power switch 156 is installed on the right side of the front panel 5A. The main power switch 156 switches between supplying (energized state) and stopping (non-energized state) the supply of power to the warm refrigerator 1 from an external power source through an outlet plug 156A extending from the back of the warm refrigerator 1.

〔Control device〕
The control device 100 is electrically connected to the inner heater 42, outer heater 44, first fan 46A, second fan 46B, thermistor 48, operation panel 150, etc. of the heating unit 40, and controls the operation of each of these parts. . The configuration of the control device 100 is not particularly limited, and for example, it is mainly configured with a microcomputer including a CPU, memories such as ROM and RAM, a timer function (an example of a time measurement means), etc. It is connected to each part of 1.

Next, the operation of the hot storage 1 will be explained. When the user connects the refrigerator 1 to an external power source and turns on the main power switch 156, power is supplied to the refrigerator 1, and the control device 100 controls the operation of each part of the refrigerator 1. control. The control device 100 of this example starts energizing the heating unit 40 when the main power switch is turned on, and the inner heater 42 and the outer heater 44 start generating heat, and the first fan 46A and the second fan 46B starts blowing air.

When the inner heater 42 and the outer heater 44 generate heat, the inner duct 41 and the outer duct 43 that are in contact with these heaters 42 and 44 are heated, and the air around the ducts 41 and 43 is heated by the radiant heat of these ducts 41 and 43. heated. Thereby, the air in the first air flow path F1 and the second air flow path F2 is heated. The control device 100 first heats the air inside the refrigerator by the inner heater 42 and the outer heater 44 until the temperature inside the refrigerator detected by the thermistor 48 reaches a preset storage temperature TA.

In addition, in the hot storage 1 of this example, when the first fan 46A is driven, the air inside the refrigerator is sent into the first air flow path F1 and heated by the inner heater 42 and the inner duct 41. , the heated air is sent downward through the first air flow path F1. At this time, a part of the air flowing through the first air flow path F1 is sent to the second air flow path F2 through the ventilation hole 41C of the side surface 41B of the inner duct 41, and the rest is sent to the second air flow path F2 at the lower end of the inner duct 41. It joins the air flow path F2 of No. 2.

Similarly, when the second fan 46B is driven, the air inside the refrigerator is sent into the second air flow path F2 and heated by the outer heater 44 and the outer duct 43, and the heated air is transferred to the second air flow path F2. The air is sent from above to below through the air flow path F2. Here, the outer duct 43 is provided with ventilation holes 43C in the vertical direction not only in the side surface portion 43B but also in the main body portion 43A facing forward. Therefore, the air sent to the second air flow path F2 is directed toward the front and sides of the outer duct 43 through the ventilation holes 43C of the main body portion 43A and the side surface portion 43B while flowing through the second air flow path F2. and sent to the warehouse. This prevents locally heated air from being sent to the lower part of the refrigerator, suppresses temperature unevenness in the vertical direction, and uniformly heats the interior of the refrigerator.

When the thermistor 48 detects that the temperature inside the refrigerator has reached the preset storage temperature TA, the control device 100 stops energizing the inner heater 42 and the outer heater 44, and stops heating the air inside the refrigerator. do. Note that even while the power supply to the heaters 42 and 44 is stopped, the control device 100 causes the first fan 46A and the second fan 46B to continue blowing air in order to maintain a uniform temperature inside the refrigerator. There is. Then, when the internal temperature detected by the thermistor 48 becomes lower than the storage temperature TA by a predetermined temperature (for example, 2° C.), the control device 100 starts energizing the inner heater 42 and the outer heater 44 again, The air inside the refrigerator is heated until the temperature inside the refrigerator reaches the storage temperature TA. By repeating such a heat retention operation, the internal temperature of the hot storage 1 can be maintained at the high temperature storage temperature TA, and foods and the like can be stored at the target temperature TA.

〔rubber seal〕
The upper door 31 and the lower door 32 each have a substantially rectangular plate shape, and as shown in FIG. ) A packing 34 is attached to the periphery (edge). The packing 34 is a sealing member made of an elastic body (here, silicone rubber) that has heat resistance in the operating temperature range of the refrigerator 1 . As described above, the upper door 31 and the lower door 32 are each configured to be able to swing open and close, and there is a space between the upper door 31 and the lower door 32 to avoid interference when opening and closing the doors. A gap is provided. However, the opening of the hot storage room 11 has a so-called pillar-less structure in which no pillar member is provided at a position facing the lower end of the upper door 31 and the upper end of the lower door 32. Therefore, when the upper door 31 and the lower door 32 are closed, the packing 34 comes into close contact with the opening edge of the greenhouse 11 to seal the doors 31, 32 and the opening edge, and also seals the upper door 31 and the lower door 32. It is configured to seal the gap with the door 32.

Specifically, the packing 34 includes an upper packing 35A attached to the upper edge of the upper door 31, a left packing 35B and a right packing 35C attached to the left and right side edges, and a lower edge. A lower packing 35D, an upper packing 35E attached to the upper edge of the lower door 32, a left packing 35F and a right packing 35G attached to the left and right side edges, respectively, and a lower packing 35H attached to the lower edge. It is composed of . When the doors 31 and 32 are closed, the upper packing 35A, left packing 35B, and right packing 35C of the upper door 31, and the left packing 35F, right packing 35G, and lower packing 35H of the lower door 32, This is a packing that is interposed between the doors 31, 32 and the opening edge of the greenhouse 11, and is attached as a whole along the back surfaces 31A, 32A of each door 31, 32. The lower packing 35D of the upper door 31 and the upper packing 35E of the lower door 32 are packings arranged in the gap between the upper door 31 and the lower door 32 when the doors 31 and 32 are closed, and are at least partially are attached so as to be located below the upper door 31 and above the lower door 32, respectively.

In conventional heating cabinets and refrigerators, separate packing members with different configurations are used for the packing that comes into contact with the opening edge of the greenhouse or refrigerator compartment and the packing that is placed in the pillarless position. That's what I was doing. On the other hand, in the hot storage 1 of this example, all the packings 34 (35A to 35H) have the configuration shown in FIG. 20.

That is, the packing 34 is an elongated member having elasticity, and includes a hollow cylindrical portion 34A and a hook-shaped leg portion 34D extending from the cylindrical portion 34A. The cylindrical portion 34A has a tubular shape with a substantially D-shaped cross section, and includes a flat portion 34B and a curved portion 34C. The leg portion 34D has a substantially L-shaped cross section, and includes a base end portion 34E extending substantially perpendicularly from one end of the flat portion 34B to the side opposite to the curved portion 34C with respect to the flat portion 34B, and a distal end of the base end portion 34E. A fixing portion 34F extending from the flat portion 34B along the flat portion 34B. The proximal end portion 34E is thicker than other portions, increasing the durability of the packing 34, and supports the fixed portion 34F so that the flat portion 34B and the fixed portion 34F are approximately parallel in the free state. ing. The distance between the flat part 34B and the fixed part 34F separated by the base end part 34E is about several millimeters, which is sufficiently small compared to the dimension in the extending direction of the fixed part 34F. Further, the distal end of the fixing portion 34F has a protrusion that protrudes toward the cylindrical portion 34A. This packing 34 can be manufactured, for example, by extrusion molding silicone rubber.

Regarding the mounting structure of the packing 34 that is interposed between the doors 31, 32 and the opening edge of the greenhouse 11 when the door is closed, the left packing 35F attached to the lower door 32 shown in FIG. 11 is used as an example. explain. The upper packing 35A, left packing 35B, and right packing 35C of the upper door 31 and the right packing 35G and lower packing 35H of the lower door 32 can be attached in the same manner.

First, the configuration of the lower door 32 will be explained. The lower door 32 includes a lower door main body 321, a reinforcing member 322, a heat insulating material 323, and a back plate 324. The lower door main body 321 is formed by bending a single stainless steel plate punched into a predetermined unfolded shape, thereby forming the front surface 321a of the lower door 32, the upper, lower, left and right side surfaces 321b, and the upper, lower, left and right peripheral edges of the back surface 32A. 321c, and is formed in a box shape. The lower door main body 321 has a rectangular opening in a portion surrounded by a peripheral edge 321c, and a reinforcing member 322 and a heat insulating material 323 can be placed inside the opening through this opening. Note that the upper, lower, left, and right peripheral edges 321c are provided with a stepped portion 321d that protrudes toward the rear (the side facing the greenhouse room 11 when the lower door 32 is closed) at the peripheral edge of the opening. The stepped portion 321d provided on the upper peripheral edge 321c is located closer to the center of the back surface 32A than those provided on the left and right and lower peripheral edges 321c of the lower door 32.

The reinforcing member 322 is a member that mainly reinforces the lower door main body 321 against the load applied to the lower door 32, and inside the box-shaped lower door main body 321, it extends in the vertical direction along the left and right side surfaces 321b. It is distributed across. The reinforcing member 322 is made of a stainless steel plate that is thicker (in other words, has higher rigidity) than the stainless steel plate that makes up the lower door main body 321. In the mounting structure of the packing 34, the reinforcing member 322 can be regarded as a part of the lower door main body 321. Note that the reinforcing member 322 arranged along the left side surface 321b (coinciding with the left side surface 32B) is provided on the side of the hinge mechanism 32D of the lower door 32, so in order to further increase the reinforcement strength. , has a long plate shape with a substantially U-shaped cross section, and has a side surface along the left side surface 321b of the lower door main body 321 and a width direction of this side surface (when the lower door 32 is closed). It includes a front part extending along the front surface 321a from both ends in the front-rear direction) and a back part extending along the peripheral edge 321c of the back surface 32A. On the other hand, although not specifically shown, the reinforcing member 322 arranged along the right side surface 321b (coinciding with the right side surface 32C) has a long plate shape with a substantially L-shaped cross section. , a side surface portion along the right side surface 321b of the lower door main body 321, and a back surface portion extending from the end of this side surface portion on the back surface 32A side along the peripheral edge 321c. Note that the reinforcing member 322 is not arranged along the upper and lower side surfaces 321b. The reinforcing member 322 has a tip of a portion extending along the peripheral edge 321c of the back surface folded back to the outside so as to contact the stepped portion 321d of the lower door main body 321 from the inside (from the front when the lower door 32 is closed). It is doubled. This reinforcing member 322 is screwed to the left side surface 321b of the lower door main body 321 and the hinge mechanism 32D or the handle 33.

The heat insulating material 323 is a plate-like body made of fibrous glass wool formed into a plate-like shape having a predetermined density, and is cut to match the shape of the lower door body 321 and housed therein.
The back plate 324 is a rectangular plate that covers the opening of the lower door main body 321, and has four peripheral edges 322a bent inward (towards the front when the lower door 32 is closed) in a curved state. The back plate 324 is formed such that this folded portion contacts the periphery of the stepped portion 321d of the periphery 321c of the lower door main body 321 (in other words, contacts at the retreated portion of the periphery 321c). . The widthwise dimension of the back plate 324 is formed to be slightly smaller than the widthwise dimension of the lower door main body 321. The vertical dimension of the back plate 324 is formed to be slightly smaller on the lower side than the vertical dimension of the lower door main body 321, and further smaller on the upper side.

The left packing 35F (34) is arranged between the cylindrical portion 34A and the leg portion 34D (more specifically, between the flat portion 34B and the fixed portion 34F) with the cylindrical portion 34A disposed behind the back plate 324. It is attached to the back plate 324 so that the left peripheral edge 322a of the back plate 324 is sandwiched between the left side peripheral edge 322a of the back plate 324. In this state, by stacking the back plate 324 so as to cover the opening of the lower door body 321 and screwing it to the outer folded part of the reinforcing member 322, the left packing 35F is attached to the peripheral edge of the back face 32A of the lower door 32. fixed along. In addition, in the portion where the reinforcing member 322 is not arranged, the back plate 324 is fixed to the lower door main body 321 with screws. Here, since the peripheral edge 322a of the back plate 324 is curved and folded back, the back plate 324 can fix the left packing 35F to the lower door 32 without damaging the left packing 35F. Further, since the peripheral edge 322a of the back plate 324 is bent back with a curve, the curved portion is elastically deformed when screwed, and the fixing portion 34F of the left packing 35F is fixed to the lower door 32 without loosening. Furthermore, the folded portion of the back plate 324 has a length that does not suppress the protrusion at the fixed part 34F of the left packing 35F, and with this configuration, the left part can be removed from between the back plate 324 and the lower door body 321. The packing 35F is prevented from falling off.

On the other hand, the mounting structure of the packing 34 that seals the gap between the upper door 31 and the lower door 32 when the door is closed will be explained using the upper packing 35E attached to the lower door 32 as shown in FIGS. 12 and 13 as an example. . The lower packing 35D attached to the upper door 31 has a vertically symmetrical mounting structure with the upper packing 35E, so a similar explanation will be omitted.

The upper packing 35E is first attached to the lower door 32 in the same way as the left packing 35F described above. That is, as shown in FIG. 13, the upper packing 35E is arranged above the rear surface 32A of the lower door 32 in such a way that the fixed portion 34F is sandwiched between the peripheral edge 322a of the rear plate 324 and the peripheral edge 321c of the lower door main body 321. is fixed to the periphery of the Next, the upper packing 35E is held against the leg part 34D by the packing support member 36 so that the flat part 34B is approximately horizontal with the fixed part 34F fixed along the back surface 32A (that is, along the vertical direction). The position of the cylindrical portion 34A is displaced.

As shown in FIG. 9, the packing support member 36 is a member that displaces the cylindrical portion 34A of the upper packing 35E in its longitudinal direction, and is attached to the back plate 324. Specifically, as shown in FIG. 14, the packing support member 36 includes, roughly, a long rectangular parallelepiped-shaped box 36A with an opening on one surface, and one long side of the opening of the box 36A. It is provided with a mounting surface portion 36B extending from the opening to the side opposite to the opening, and is formed by bending a stainless steel plate cut into a predetermined developed shape. The bottom surface of the box body 36A and the mounting surface portion 36B are generally parallel to each other, and the side surface to which the mounting surface portion 36B of the box body 36A is connected is higher than the other three sides (lower door 32 is designed to be large (in the front-back direction when closed). A mounting hole 36C is provided in the mounting surface portion 36B, and a mounting hole (not shown) is also provided at the mounting position of the packing support member 36 on the back plate 324. This packing support member 36 supports the cylindrical part 34A of the upper packing 35E so that the flat part 34B is substantially horizontal, and inserts a fastener 36D such as a screw into the mounting hole 36C and the mounting hole of the back plate 324. By doing so and fastening, it is fixed to the back plate 324. At this time, the fixing position of the packing support member 36 can be finely adjusted by making the diameter of the mounting hole 36C larger (for example, φ6 mm) than the outer diameter (for example, φ4 mm) of the fastener 36D. This allows fine adjustment of the amount of displacement of the cylindrical portion 34A.

The upper packing 35E is disposed such that the curved portion 34C protrudes upward when the cylindrical portion 34A is displaced by the packing support member 36. Thereby, the angle formed by the flat portion 34B of the upper packing 35E and the fixed portion 34F is restricted to approximately 90 degrees. Here, as described above, the stepped portion 321d (see FIG. 11) provided on the upper peripheral portion 321c of the lower door main body 321 is larger than the stepped portion 321d provided on the left, right, and lower sides of the rear surface 32A. The upper end of the back plate 324 is also arranged closer to the center (that is, lower) of the lower door body 321 than the left, right, and lower ends. Therefore, the upper packing 35E is fixed slightly toward the center (that is, lower) of the back surface 32A compared to the above-mentioned left packing 35F. As a result, the lower portion of the curved portion 34C is disposed below the upper end of the lower door 32, and the upper portion thereof is disposed above the upper end of the lower door 32. Similarly, regarding the lower packing 35D attached to the upper door 31, the upper part of the curved part 34C of the lower packing 35D is arranged above the lower end of the upper door 31, and the lower part is arranged above the lower end of the upper door 31. It is placed below the bottom edge of. When the upper door 31 and the lower door 32 are closed, between the upper door 31 and the lower door 32, the lower part is arranged such that the cylindrical part 34A of the lower packing 35D and the cylindrical part 34A of the upper packing 35E are in elastic contact with each other. The fixed positions of the packing 35D and the upper packing 35E are designed. Thereby, the upper packing 35E and the lower packing 35D can be attached so as to seal the gap between the upper door 31 and the lower door 32. Further, even if the lower packing 35D and the upper packing 35E rub against each other when the upper door 31 and the lower door 32 are opened and closed, only the curved portion 34C of the cylindrical portion 34A is deformed, and the entire cylindrical portion 34A is displaced. things are suppressed.

In addition, the packing support member 36 has the other three side surfaces smaller in the longitudinal direction than the side surface to which the mounting surface portion 36B is connected, and is configured not to press the vicinity of the base end portion 34E of the packing 34. Thereby, when the packing support member 36 is attached, it is possible to easily avoid a situation where the flat part 34B of the packing 34 is caught between the lower door main body 321 (or the back plate 324). Further, when the fixed portion 34F is displaced approximately 90 degrees from the flat portion 34B of the packing 34, it is possible to suppress concentration of stress near the base end portion 34E.

In addition, as shown in FIGS. 16 and 19, the lower packing 35D and the upper packing 35E, which are arranged in the gap between the upper door 31 and the lower door 32, are connected to the opening edges of the doors 31, 32 and the greenhouse chamber 11 when the doors are closed. It is disposed at a portion corresponding to the opening of the hot storage chamber 11 so that the cylindrical portion 34A is not crushed in the front-rear direction due to being pinched between the cylindrical portions. Here, the cut surfaces of the lower packing 35D and the upper packing 35E are exposed at both left and right ends, so that the inside of the hollow cylindrical portion 34A can be seen. Therefore, the lower ends of the lower packing 35H of the upper door 31 are arranged so that the lower ends of the left packing 35B and the right packing 35C are adjacent to each other, so as to block the opening of the cylindrical portion 34A of the lower packing 35D from the outside. ing. Moreover, the upper ends of the left packing 35F and the right packing 35G are arranged at both left and right ends of the upper packing 35E of the lower door 32 so as to be adjacent to each other, so as to block the opening of the cylindrical portion 34A of the upper packing 35E from the outside. ing.

Here, as described above, the upper ends of the left packing 35F and the right packing 35G are adjacent to the end of the upper packing 35E, so they protrude above the upper end of the lower door 32 and are fixed to the lower door 32. It is in a state where it has not been done. Therefore, when the lower door 32 is opened and closed, the upper ends of the left packing 35F and the right packing 35G may swing. Therefore, as shown in FIG. 19, the left packing 35F and the right packing 35G may have their upper end openings sealed to increase the rigidity of the protruding portions. Note that if the cut surfaces are exposed at the upper ends of the left packing 35F and the right packing 35G, not only will it not look good, but it will also have the disadvantage that dust, dirt, etc. can easily enter the inside of the cylindrical part 34A. These inconveniences can be solved by sealing the opening at the upper end. Furthermore, as shown in FIG. 19, a support member 38 may be inserted above the left packing 35F and the right packing 35G. The material constituting the support member 38 is not particularly limited as long as it can make the packings 35F and 35G self-supporting. It is preferable that However, the left packing 35F and the right packing 35G may be made of a material that is rigid enough to stand on its own even when not fixed to the lower door 32.

As described above, the heating cabinet 1 disclosed herein includes a heating cabinet body 10 for accommodating objects to be heated such as cooked food and tableware, and a heating cabinet body 10 for heating the internal air of the warming cabinet body 10. A heating unit 40 is provided. The heating unit 40 includes an inner duct 41 disposed vertically with respect to a back wall 12D (an example of a side wall) of the heating refrigerator main body 10, and Inside, an outer duct 43 is arranged along the vertical direction so as to surround the inner duct 41, an inner heater 42 (first heating means) provided in the inner duct 41, and an inner heater 42 (first heating means) provided in the outer duct 43. an outside heater 44 (second heating means), and a fan 46 (air blowing mechanism) that sends the inside air of the refrigerator main body 10 from above to below with respect to the inside duct 41 and the outside duct 43. The outer duct 43 includes a ventilation hole 43C that communicates the inside of the outer duct 43 with the inside of the refrigerator main body 10.

This hot storage 1 is equipped with heaters 42 and 44 in a double duct consisting of an inner duct 41 and an outer duct 43, and the ducts 41 and 43 are heated by the heaters 42 and 44. , 43 function as a heating panel. Thereby, the heating area of the heating means can be effectively expanded, and the hot storage 1 with high heating efficiency (heat exchange efficiency) for the air inside the refrigerator can be realized. In addition, since the inner duct 41 and the outer duct 43 are arranged in duplicate along the back wall, it is possible to increase the heating area by the heating means without increasing the widthwise dimension of the refrigerator 1. is possible. Thereby, for example, when the front-rear direction is the traveling direction, the width of the passage required for moving the hot storage 1 can be kept small. Further, the air flowing inside the outer duct 43 is sent into the refrigerator not only from the downstream end of the outer duct 43 but also from the ventilation hole 43C provided in the outer duct 43. Thereby, it is possible to suppress the temperature unevenness caused by local heating of the lower part of the hot storage 1, and to uniformly heat the inside of the refrigerator.

In the above-mentioned hot storage 1, the hot storage main body 10 includes a rectangular parallelepiped-shaped hot storage chamber 11 that opens toward the front, and a door 30 that opens and closes the opening of the hot storage chamber 11. The outer duct 43 is installed on the back wall 12D, which is the side wall opposite to the opening, and includes a main body 43A spaced apart from the back wall 12D, and extends from both ends of the main body 43A toward the back wall 12D. A plurality of ventilation holes 43C are provided vertically in the main body 43A and the side surface 43B. According to such a configuration, the heated air flowing downward through the outer duct 43 can be sent into the refrigerator in the middle of the flow, and the occurrence of temperature unevenness in the refrigerator can be more preferably suppressed. can. Thereby, the inside of the hot storage 1 can be heated more uniformly.

In the above-mentioned hot storage 1, the inner duct 41 is installed on the back wall 12D, which is the side wall opposite to the opening, and the main body 41A is spaced apart from the back wall 12D. and a side surface portion 41B extending from both ends toward the back wall 12D, and a plurality of ventilation holes 41C are provided in the side surface portion 41B in the vertical direction. According to such a configuration, the heated air flowing downward through the inner duct 41 can be sent into the outer duct 43 in the middle of the flow, and the heated air can be sent into the refrigerator from the outer duct 43 in the middle of the flow. can increase the amount of air that can be Thereby, circulation of heated air within the refrigerator can be promoted, heating efficiency can be increased, and occurrence of temperature unevenness can be suppressed more suitably.

In the above-mentioned hot storage 1, the inner heater 42 (first heating means) and the outer heater 44 (second heating means) are each cord heaters, and the inner duct 41 and the outer duct 43 are respectively connected to the back wall 12D ( The main body part 43A is spaced apart from the side wall (an example of a side wall), and the side part 43B extends from both ends of the main body part 43A toward the back wall 12D. The cord heater is disposed on the surface of the main body 43A facing the back wall 12D, and the fan 46 (air blowing mechanism) blows air in a direction transverse to the rotation axis of the drum-shaped rotor blade. Equipped with a cross-flow type fan. According to the above configuration, the cross-flow type fan 46 circulates the air inside the refrigerator, so compared to the case where a propeller fan, blower, etc. is used, the air volume can be relatively increased while the static pressure is reduced. can send air. It is also preferable in that a wide and uniform airflow suitable for the cross-sectional shape of the ducts 41 and 43 can be created. Thereby, the air heated by the heating unit 40 can be efficiently circulated inside the refrigerator while preventing the food being kept from drying out. As a result, a hot storage 1 that has excellent heating efficiency and hot storage efficiency and is suitable for hot storage of cooked foods is realized. Such a hot storage 1 is also advantageous in that, for example, it is not necessary to include a humidifying member for humidifying the inside of the refrigerator.

In the above-mentioned hot storage 1, cord heaters are used as the first and second heating means, and are arranged in a large area in the vertical direction on the surfaces facing the backs of the inner duct 41 and the outer duct 43. has been done. Although the cord heater is not bulky, it generates a large amount of heat, and if the cord heater is arranged closely in the heater panel, it may cause abnormal overheating of the heating unit 40, a local increase in the temperature inside the refrigerator, or temperature unevenness. There was a risk that something like that would happen. On the other hand, the heating cabinet 1 disclosed herein has a double structure of ducts 41 and 43, and the cord heater is divided into an inner duct 41 and an outer duct 43 and arranged to avoid overcrowding. Further, the cord heaters are arranged separately on the right side and left side of the inner duct 41 and the outer duct 43. Further, the inner duct 41 and the outer duct 43 are provided with ventilation holes 41C and 43C in the vertical direction to promote circulation of heated air within the refrigerator. In particular, in the outer duct 43, ventilation holes 43C are arranged vertically between the right side portion and the left side portion where the cord heater is provided. With such a configuration, the hot storage 1 disclosed herein uses a cord heater as a heating means, but prevents abnormal overheating of the heating unit 40, local rise in internal temperature, and temperature unevenness. It is said that it is possible to suppress this in a suitable manner.

In the refrigerator 1 described above, the inner duct 41 and the outer duct 43 are each made of an aluminum alloy. Aluminum or aluminum alloy has high thermal conductivity and is relatively lightweight, so by configuring the inner duct 41 and the outer duct 43 with aluminum or aluminum alloy, the inner heater 42 (first heating means) and A configuration in which the heat generated by the outer heater 44 (second heating means) can be efficiently propagated to the inner duct 41 and the outer duct 43, and the heat can also be easily transferred from the inner duct 41 and the outer duct 43 to the surrounding air. It becomes. Moreover, the double duct consisting of the inner duct 41 and the outer duct 43 can be made lighter. Thereby, the heating efficiency of the air inside the hot storage 1 can be further increased, and the weight of the hot storage 1 can be reduced.

≪Embodiment 2≫
A hot storage according to the second embodiment will be described with reference to FIGS. 15 to 17. This hot storage differs from the hot storage 1 of the first embodiment in that a wind direction plate 50 is attached to the front surface of the inner duct 141 and the back wall 112D. The rest of the configuration of the hot storage is the same as the hot storage 1 according to the first embodiment, so only the configuration that is different from the hot storage 1 of the first embodiment will be described below, and similar configurations will be explained without implementation. The same reference numerals as those in Embodiment 1 are given, and explanations of their functions and effects are omitted (the same applies to Embodiment 3 and subsequent embodiments).

In this embodiment, as shown in FIG. 15, wind direction plates 50 extending toward the outer duct 43 and the inner duct 141 are attached to the inner duct 141 and the back wall 112D, respectively. The wind direction plate 50 has the shape of a rectangular flat stainless steel plate bent so that the angle formed is more than 90 degrees (for example, 100 degrees or more and 150 degrees or less, for example, 120 degrees). . In the wind direction plate 50, the flat portion 50A on one side with respect to the bent portion is fixed to the inner duct 141 or the back wall 112D, and the flat portion 50B on the other side is fixed to the inner duct 141 or the back wall 112D. It is pushed forward. At this time, the wind direction plate 50 is fixed to the inner duct 141 or the back wall 112D in such a manner that the plate surface of the plane portion 50B on the other side is inclined when viewed from the front.

For example, as shown in FIG. 16, the wind direction plate 50 attached to the front surface of the back wall 112D is inclined downward as it goes to the right on the right side of the back wall 112D, and as it goes to the left on the left side of the back wall 112D. It is fixed in a downward tilting position. As a result, the air flowing through the first air flow path F1 is diverted toward the inner duct 141 and comes into contact with the inner duct 141 more easily, thereby increasing the heating efficiency of the air. Moreover, the air flowing through the first air flow path F1 flows toward both left and right ends, and is easily sent to the second air flow path F2 through the ventilation hole 41C formed in the side surface portion 41B of the inner duct 141. It has become.

Further, as shown in FIG. 17, for example, the wind direction plate 50 attached to the front surface of the inner duct 141 is fixed in the central part of the inner duct 141 in an attitude that is inclined downward toward the center in the width direction. The left side of the screen is fixed in a position that tilts downward toward the left, and the left side is fixed in a posture that tilts downward toward the left. As a result, the air flowing through the second air flow path F2 is diverted toward the outer duct 43 and comes into contact with the outer duct 43 more easily, thereby increasing the heating efficiency of the air. Furthermore, the air flowing through the center portion of the second air flow path F2 is changed toward the center in the width direction, and passes through the ventilation hole 43C formed in the center portion of the main body portion 43A of the outer duct 43 into the refrigerator. It is easier to send to In addition, the air flowing through the left and right sides of the second air flow path F2 is changed in flow toward both left and right ends, and is sent into the refrigerator through the ventilation hole 43C formed in the side surface 43B of the outer duct 43. It's easier to get caught.

In the above-mentioned hot storage, a wind direction plate 50 extending toward the outer duct 43 is provided on the surface (here, the front surface) of the inner duct 141 facing the outer duct 43 . Furthermore, in the above-mentioned hot storage, a wind direction plate 50 extending toward the inner duct 141 is provided on the surface (here, the front surface) of the back wall 112D facing the inner duct 141.
According to such a configuration, the downward flow of air in the inner duct 141 and the outer duct 43 can be changed to the direction toward the plate surfaces of the inner duct 141 and the outer duct 43. Thereby, the contact efficiency between the inner duct 141 and the outer duct 43 and the air flowing inside the duct can be increased, and the air flowing inside the duct can be efficiently heated. Moreover, the air flowing inside the inner duct 141 (first air flow path F1) can be efficiently sent from the ventilation hole 41C into the outer duct 43, and the inside of the outer duct 43 (second air flow path F2) can be efficiently sent. Flowing air can be efficiently sent into the refrigerator from the ventilation hole 43C. As a result, the heating efficiency and circulation efficiency of the air within the refrigerator can be further increased, and temperature unevenness within the refrigerator can be suitably suppressed. Note that the manner in which the wind direction plate 50 is installed is not limited to the above example, and a similar effect can be obtained as long as it can disturb the flow of air toward the downstream in the first air flow path F1 and the second air flow path F2. be able to.

≪Embodiment 3≫
Control of the hot storage according to the third embodiment will be described with reference to FIG. 18. The hot storage of the third embodiment is different from the examples of the first and second embodiments in the manner in which the heating unit 40 is controlled by the control device 200. Other configurations may be the same as those in Embodiment 1 and Embodiment 2, and descriptions of similar configurations, operations, and effects will be omitted.
In the hot storage of Embodiment 3, when the hot storage temperature TA becomes a high temperature (e.g., 90° C.) exceeding the first temperature T1 (e.g., 80° C.), which may cause abnormal overheating of the heating unit 40. (TA>T1), the control device 200 first operates the inner heater 42 and the outer heater 44 continuously, as in the first embodiment, to start heating the air inside the refrigerator. Then, when the internal temperature detected by the thermistor 48 reaches the first temperature T1, the control device 200 changes the operation of the heating unit 40.

Specifically, as shown in FIG. 12, the control device 200 stops the operation of the inner heater 42 and the outer heater 44 when the internal temperature reaches the first temperature T1 (here, 80° C.). The control device 200 then controls the inner heater 42 and The operation of the outer heater 44 is restarted.
Next, when the temperature inside the refrigerator detected by the thermistor 48 reaches a predetermined temperature (for example, 4 degrees Celsius) higher than the temperature at the time of shutdown (that is, 80 degrees Celsius) (that is, 84 degrees Celsius), the control device 200 controls ), the operation of the inner heater 42 and outer heater 44 is stopped again.

Then, the control device 200 also controls the temperature detected by the thermistor 48 when the temperature inside the refrigerator is lowered by a predetermined temperature (2 degrees Celsius) than when the operation is stopped (84 degrees Celsius) (for example, when it becomes 82 degrees Celsius). The inner heater 42 and the outer heater 44 are operated until the temperature inside the refrigerator reaches a temperature (88° C.) higher by a predetermined temperature (4° C.) than when the operation is stopped (ie, 84° C.). In this way, the control device 200 is configured to operate the inner heater 42 and the outer heater 44 in stages within a predetermined temperature range (for example, 4° C.) when the internal temperature reaches the first temperature T1. There is. Note that when the internal temperature reaches the storage temperature TA, the control device 200 performs the normal heat retention operation.

The heating refrigerator described above includes a thermistor 48 (temperature detection means) that detects the temperature inside the refrigerator (temperature of the inside air), and a control device 200 that controls the operation of the heating unit 40. The control device 200 controls the inner heater 42 (first heating means) and the outer heater until the internal temperature detected by the thermistor 48 reaches a first temperature T1 lower than the preset storage temperature TA. 44 (second heating means) is operated continuously. After the internal temperature detected by the thermistor 48 reaches the first temperature T1, the inner heater 42 and the outer heater 44 are operated intermittently so that the internal air is heated step by step within a predetermined temperature range. It has a configuration that allows

In the heating refrigerator with the above configuration, for example, when the heating temperature TA is high, the inner heater 42 (first heating means) and the outer heater 44 (second heating means) A situation may also occur where the device is significantly overheated. However, according to the above configuration, after the temperature inside the refrigerator reaches, for example, a first temperature at which a discrepancy between the temperature of the heating means and the temperature inside the refrigerator tends to occur, the heating means is intermittently operated to raise the temperature inside the refrigerator. can be gradually increased by a predetermined temperature range. This makes it possible to suppress the deviation between the temperature of the heating means and the temperature inside the refrigerator, and as a result, it is not necessary to set the heat-resistant temperature of the heating unit 40 excessively high, and the durability of the heating unit 40 can be reduced. can be increased. Furthermore, if the refrigerator is equipped with a safety device (for example, an overheating prevention device such as a thermostat 45), it is possible to prevent the safety device from malfunctioning.

≪Embodiment 4≫
Control of the hot storage according to the fourth embodiment will be described with reference to FIG. 19. The heating refrigerator of Embodiment 4 is different from the examples of Embodiments 1 to 3 in that the control device 300 detects a failure of the heating unit 40. Other configurations may be the same as those in Embodiment 1 to Embodiment 3, and descriptions of similar configurations, operations, and effects will be omitted.

The heating refrigerator of Embodiment 4 is connected to an external power source by the user, and when the main power switch 156 is turned on (S01), energization to the inner heater 42 and the outer heater 44 is started, and the inside of the refrigerator is turned on. heating of the air begins. In addition, the control device 1200 uses a timer function (clocking means) to measure the elapsed time from the start of energization (in other words, from the start of heating of the air in the refrigerator) in a predetermined time span. , the temperature inside the refrigerator is detected by the thermistor 48.

Then, the control device 300 uses the timer function to determine that the internal temperature detected by the thermistor 48 is set to a predetermined temperature before the elapsed time from the start of heating reaches a predetermined set time (for example, 2 hours) (NO in S03). It is determined whether the temperature has reached (for example, 80° C.) (S02). Here, if the temperature inside the refrigerator has reached the predetermined temperature (YES in S02), the control device 300 determines that the air inside the refrigerator is being heated smoothly and that the inner heater 42 and the outer heater 44 are normal. Make a judgment (S04). On the other hand, when the temperature inside the refrigerator has not reached the predetermined temperature (NO in S02) and the elapsed time from the start of heating reaches the predetermined set time (YES in S03), the air inside the refrigerator is heated. is not performed smoothly, and the control device 300 determines that at least one of the inner heater 42 and the outer heater 44 is out of order (S05). In step S05, if it is determined that the heater is malfunctioning, the control device 300 displays an error code on the display unit 152 and lights up a warning light to inform the surroundings that the heater 42, 44 is malfunctioning. Notify.

According to the above configuration, a failure of the inner heater 42 (first heating means) and the outer heater 44 (second heating means) can be automatically detected and promptly notified to the user. As a result, if, for example, the inner heater 42 or the outer heater 44 breaks down due to a disconnection, the user can quickly grasp the situation and take immediate action to deal with the breakdown of the inner heater 42 or the outer heater 44. be able to.

≪Embodiment 5≫
Control of the hot storage according to the fifth embodiment will be described with reference to FIG. 20. The hot storage of the fifth embodiment is different from the examples of the first to fourth embodiments in that the control device 400 performs failure detection that is different from that of the fourth embodiment. Other configurations may be the same as those in Embodiments 1 to 4, and descriptions of similar configurations, operations, and effects will be omitted.

In the heating refrigerator of Embodiment 5, when the user connects the external power source and turns on the main power switch 156 (S11), energization to the inner heater 42 and the outer heater 44 is started, and the inside of the refrigerator is turned on. heating of the air begins. The control device 400 uses a timer function (clocking means) to measure the elapsed time from the start of energization (in other words, the start of heating the air in the refrigerator) at a predetermined time span (for example, every 30 seconds). A thermistor 48 detects the temperature inside the refrigerator. Further, the control device 400 calculates a temperature gradient regarding a change in the temperature inside the refrigerator from the detection result of the temperature inside the refrigerator.

Then, as shown in FIG. 20, the control device 400 controls the temperature within the refrigerator before the elapsed time from the start of heating measured by the timer function reaches a predetermined set time (for example, 30 minutes) (NO in S13). It is determined whether the temperature gradient has reached a predetermined threshold (for example, 1° C./30 seconds) (S12). Here, if the temperature gradient has reached the threshold value (YES in S12), the control device 400 determines that the air in the refrigerator is being heated smoothly and that the inner heater 42 and the outer heater 44 are normal ( S14). On the other hand, if the temperature gradient has not reached the threshold (NO in S012) and the elapsed time from the start of heating has reached the predetermined set time (YES in S03), the air inside the refrigerator is heated. is not performed smoothly, and the control device 400 determines that at least one of the inner heater 42 and the outer heater 44 is out of order (S15). In step S15, if it is determined that the heater is malfunctioning, the control device 400 displays an error code on the display unit 152 and lights up a warning light to inform the surroundings that the heater 42, 44 is malfunctioning. Notify.

According to the above configuration, since the temperature gradient of the internal temperature is calculated to determine the failure, the determination can be made in a relatively short time (for example, 30 minutes) compared to the fourth embodiment. . In addition, for example, when the environmental temperature is extremely low, the temperature gradient of the internal temperature at the initial stage of heating tends to be low. The influence on temperature gradients can be reduced. Thereby, the same effects as in the fourth embodiment can be obtained in a shorter time.

≪Embodiment 6≫
A hot storage according to Embodiment 6 will be described with reference to FIG. 21. As shown in FIG. 15, in the heating cabinet of the sixth embodiment, the operation panel 250 is additionally equipped with a dedicated switch 154S (an example of an input section) for measuring the heating time. Further, the control device 500 is equipped with a function of measuring the elapsed time from the time when the switch is pressed. Other configurations may be the same as those in Embodiments 1 to 5, and descriptions of similar configurations, operations, and effects will be omitted.

That is, when the switch 154S is pressed and a signal is input, the heating refrigerator control device 500 uses a timer function to measure the elapsed time from the time when the switch was pressed. Then, the control device 500 determines that the elapsed time measured by the timer function is a preset first time (for example, in the above-mentioned "Mass Cooking Facility Hygiene Management Manual", the desired time until the cooked food is eaten). 2 hours), a message indicating that a predetermined elapsed time has been reached is displayed on the display unit 152 (an example of a notification means), a warning light is turned on, or a buzzer (an example of an alarm) is displayed. ) to notify the surrounding area.

Specifically, in a hotel kitchen, etc., the user places a plate with cooked food on the tray 25 (hotel pan), and the temperature inside the refrigerator reaches the preset heating temperature TA. It is inserted into the tray guide 23 of a hot refrigerator. Then, after storing all the trays 25 in the refrigerator and closing the door 30, the user presses the switch 154S. Thereby, the hot storage control device 500 measures the heating time of the above-mentioned dish in the hot storage. When the warming time reaches the first hour (here, 2 hours), a message indicating that a predetermined elapsed time has been reached is displayed on the display unit 152 (an example of a notification means), and a warning light is turned on. and inform the surrounding area. At this time, if the food has not been served until the first warming time has elapsed, the user can take measures such as, for example, disposing of the food. Thereby, for example, when performing hygiene management according to HACCP, it is possible to easily carry out appropriate temperature control of cooked foods.

≪Embodiment 7≫
A hot storage according to Embodiment 7 will be described with reference to FIG. 22. The heating refrigerator of Embodiment 7 is different from Embodiment 1 in that the mounting hole 136C of the packing support member 136 is a long hole that is long in the direction in which the upper door 31 and the lower door 32 are lined up (that is, the vertical direction). This is different from the example of the sixth embodiment. Other configurations may be the same as those in Embodiments 1 to 6, and descriptions of similar configurations, operations, and effects will be omitted.

As shown in FIG. 22, the cooling chamber 310 has a mounting hole 136C that is a long hole that is elongated in the vertical direction. With this configuration, when the packing support member 136 is temporarily fixed to the doors 31, 32 by the fastener 36D, the mounting position of the packing support member 136 relative to the doors 31, 32 and the packings 35D, 35E can be adjusted in the vertical direction. You can make fine adjustments with . As a result, even if, for example, there are variations in the product dimensions of the packings 35D and 35E, or there are variations in the manner in which the lower and upper packings 35D and 35E are attached to the upper and lower doors 31 and 32, the packings The amount of displacement of the cylindrical portions 34A of the packings 35D and 35E can be adjusted by the support member 136, and as a result, the degree of contact between the lower packing 35D and the upper packing 35E can be adjusted. In other words, the airtightness between the lower packing 35D and the upper packing 35E when the door is closed can be suitably adjusted.

≪Embodiment 8≫
A hot storage according to Embodiment 8 will be described with reference to FIGS. 23 to 26. The heating cabinet of Embodiment 8 is different from the examples of Embodiments 1 to 7 in the sealing structure of the gap between the upper door 31 and the lower door 32. Other configurations may be the same as those in Embodiment 1 to Embodiment 7, and descriptions of similar configurations, operations, and effects will be omitted.

23 and 24 are views of the upper door 31 and the lower door 32 from the back side, and for reference, the contour of the hot storage and the contour of the opening of the hot storage chamber 11 are drawn with imaginary lines. Also shown.
A lower packing 135D is attached to the lower edge of the upper door 31 and an upper packing 135E is attached to the upper edge of the lower door 32 to the upper door 31 and the lower door 32 of the refrigerator. As shown in FIG. 26, the lower packing 135D and the upper packing 135E each have a long rectangular sheet shape, and as shown in FIG. They are attached to the back surfaces 31A and 32A of the doors 31 and 32, respectively. In addition, in FIG. 26, the packings 135D and 135E are shown spaced apart in the vertical direction (the same applies to the following embodiments). Although these packings 135D and 135E are made of a flexible material such as silicone rubber, they are placed in a position where the longitudinal direction is horizontal and the short direction is along the vertical direction, for example like the upper packing 135E. It is said to have enough rigidity to stand on its own without bending when its lower end is fixed. As shown in FIG. 24, the longitudinal dimensions of the lower packing 135D and the upper packing 135E are smaller than the widthwise dimensions of the greenhouse body 10 in order to cover the opening of the greenhouse 11 in the width direction. It is formed larger than the dimension in the width direction. The widthwise dimensions of the lower packing 135D and the upper packing 135E are such that the lower end of the lower packing 135D and the upper end of the upper packing 135E overlap when they are attached to the upper door 31 and the lower door 32 in the closed state. There is.

As shown in FIG. 25, the packing holding member 236 has a step slightly smaller than the thickness of the packings 135D and 135E, and while holding the packings 135D and 135E at this step without damaging them, the upper door 31 and It is fixed to the lower door 32. The packing holding member 236 has a longitudinal (width) dimension that is equal to the width of the opening of the greenhouse 11 in order to ensure sealing between the doors 31 and 32 of the greenhouse and the edges of the opening. It is designed to be smaller than the width dimension.

The packings 135D and 135E having the above structure have a simple shape, so they can be manufactured at low cost and can be easily installed, which is advantageous. Further, in the above-mentioned hot storage, the lower end of the lower packing 135D and the upper end of the upper packing 135E overlap in the closed door state, so that the space between the upper door 31 and the lower door 32 can be airtightly sealed. Furthermore, when opening either the upper door 31 or the lower door 32, one of the packings 135D, 135E can bend and climb over the other packing 135E, 135D as necessary, allowing the doors 31, 32 to open smoothly. It is possible to open and close.

≪Embodiment 9≫
A hot storage according to Embodiment 9 will be described with reference to FIGS. 27 and 28. The heating cabinet of Embodiment 9 is different from the heating cabinet of Embodiment 8 in that a cover member 37 is further provided in the gap between the upper door 31 and the lower door 32. Other configurations may be the same as those in Embodiment 1 to Embodiment 8, and descriptions of similar configurations, operations, and effects will be omitted.

FIG. 27 shows that in the heating cabinet of Embodiment 8, when the doors 31 and 32 are opened and closed, one of the packings 135D and 135E does not completely get over the other packings 135E and 135D, but is inserted halfway in the width direction. They are (A) a sectional view and (B) a front view showing a (twisted) state. In this way, even if the lower packing 135D and the upper packing 135E are incorrectly inserted at the overlapping portion, this does not greatly affect the warming effect of the warming refrigerator, but there is a problem in that the appearance is poor. Therefore, in the heating cabinet of Embodiment 9, at least one of the upper door 31 and the lower door 32 (in this example, the upper door 31) is provided with a cover that hides the overlapping parts of the packings 135D and 135E from being exposed to the front. A member 37 is provided.

As shown in FIG. 28, the cover member 37 is a long plate material with an L-shaped cross section, and is in a posture in which the other plane part hangs down on the front side of the upper door 31, and one plane part hangs down on the front side of the upper door 31. 31 is fixed to the lower side surface 32E. The longitudinal dimension (width direction) of the cover member 37 is approximately the same as or slightly larger than the longitudinal dimensions of the lower packing 135D and the upper packing 135E. The vertical dimension of the other plane part of the cover member 37 is such that it is possible to hide the misplaced part of the packings 135D and 135E from the front, and to allow the upper door 31 and the lower door 32 to swing open and close independently. It is preferable that the size is such that it does not interfere with the lower door 32 (the door to which the cover member 37 is not attached) when the cover member 37 is attached. Thereby, when the lower packing 135D and the upper packing 135E are incorrectly inserted in the overlapping portion, it is possible to avoid a situation where the appearance becomes poor.

≪Embodiment 10≫
The lower packing 235D of the upper door 31 and the upper packing 235E of the lower door 32 according to Embodiment 10 will be described with reference to FIGS. 29 and 30. Embodiment 10 differs from Embodiments 8 and 9 in that slits S1 are provided in packings 235D and 235E that seal the gap between upper door 31 and lower door 32. Other configurations may be the same as those in Embodiments 1 to 9, and descriptions of similar configurations, operations, and effects will be omitted.

As shown in FIG. 29, the lower packing 235D and the upper packing 235E of Embodiment 10 are attached to the lower end of the lower packing 235D and the upper end of the upper packing 235E when attached to the doors 31, 32. In each case, linear slits S1 are provided at predetermined intervals. The positions of the slits S1 provided in the lower packing 235D and the upper packing 235E may be the same or different in the width direction. Preferably, the slits S1 are provided at different positions in the width direction. The depth of the slit S1 is preferably slightly larger than the dimension in which the lower packing 235D and the upper packing 235E overlap in the vertical direction when the packings 235D and 235E are attached to the doors 31 and 32.

When the lower packing 235D and the upper packing 235E are overlapped in the middle in the width direction, the packings 235D and 235E can be significantly bent in the front-rear direction at the overlapped position, as shown in FIG. However, according to the above configuration, when the lower packing 235D and the upper packing 235E are inserted incorrectly in the middle in the width direction, the force acting on the bending portion is released through the slit S1, and as shown in FIG. The packing 235D and the upper packing 235E fit together in the slit S1, and the bending is eliminated. This makes it possible to improve the airtightness between the upper door 31 and the lower door 32, compared to the case where the packings 235D and 235E are greatly bent in the front-rear direction and inserted into each other. Note that the slit S1 may be provided only in either the lower packing 235D or the upper packing 235E (the same applies to the following embodiments).

≪Embodiment 11≫
The lower packing 335D of the upper door 31 and the upper packing 335E of the lower door 32 according to Embodiment 11 will be described with reference to FIG. 31. The eleventh embodiment is different from the tenth embodiment in the shape of the slit S2 formed in the lower packing 335D and the upper packing 335E. Other configurations may be the same as those in Embodiment 1 to Embodiment 10, and descriptions of similar configurations, operations, and effects will be omitted.

As shown in FIG. 31, in the lower packing 335D and the upper packing 335E of the eleventh embodiment, the innermost end (base end) of the linear slit S2 is a round hole. With this configuration, even if external forces act in opposite directions on both sides of the slit S2 by opening and closing the doors 31 and 32, the packings 235D and 235E are prevented from tearing at the slit S2. . Thereby, the durability of the lower packing 335D and the upper packing 335E can be increased.

≪Embodiment 12≫
The lower packing 435D of the upper door 31 and the upper packing 435E of the lower door 32 according to the twelfth embodiment will be described with reference to FIG. 32. The twelfth embodiment is different from the tenth and eleventh embodiments in the form of the slit S3 formed in the lower packing 435D and the upper packing 435E. Other configurations may be the same as those in Embodiments 1 to 11, and descriptions of similar configurations, operations, and effects will be omitted.

As shown in FIG. 32, the lower packing 435D and the upper packing 435E of the twelfth embodiment have different densities of linear slits S3 in the width direction. That is, the number of slits S3 provided in the lower packing 435D and the upper packing 435E increases in the width direction as they approach the hinge mechanisms 31D and 32D of the doors 31 and 32 (in this example, as they move toward the left). ing. In other words, the distance between adjacent slits S3 is designed to become smaller as the distance between adjacent slits S3 approaches the hinge mechanisms 31D and 32D. In the area close to the hinge mechanisms 31D, 32D, the radius of rotation when opening and closing the doors 31, 32 is small, so when the packings 235D, 235E are bent due to incorrect insertion, the slit S3 to correct this bends. A situation may occur that does not exist in the vicinity of the part. However, according to the above configuration, since the slits S3 are provided in high density in the areas where the rotation radius of the doors 31 and 32 is small, the slits S3 are easily arranged in the flexible portions of the packings 235D and 235E. Thereby, the deflection of the packings 235D and 235E can be suitably eliminated at the slit S3 portion.

≪Embodiment 13≫
The lower packing 535D of the upper door 31 and the upper packing 535E of the lower door 32 according to the thirteenth embodiment will be described with reference to FIG. 33. In the thirteenth embodiment, the shapes of the free ends of the lower packing 535D and the upper packing 535E are different from those of the first to twelfth embodiments. Other configurations may be the same as those in Embodiments 1 to 12, and descriptions of similar configurations, operations, and effects will be omitted.

In the lower packing 535D and the upper packing 535E of the thirteenth embodiment, the slits S4 are provided at the same position in the vertical direction, as shown in FIG. 33. Furthermore, the slits S4 are designed such that the distance between adjacent slits S3 becomes smaller as the slits S4 approach the hinge mechanisms 31D and 32D (in this example, as they move toward the left). The lower end of the lower packing 535D and the upper end of the upper packing 535E have a zigzag shape that is concave in the vertical direction at the position of the slit S4 and convex between the adjacent slits S4. According to such a configuration, the area of the overlapping portion (in other words, the contact area) between the lower packing 535D and the upper packing 535E is reduced, and the contact resistance for eliminating deflection at the misplaced portion is reduced. Thereby, the deflection in the overlapping portion of the lower packing 535D and the upper packing 535E can be more smoothly eliminated. In this example, the tips of the lower packing 535D and the upper packing 535E have a zigzag shape, but the shape of the cut at the tips of the packings 535D and 535E is not limited as long as the contact resistance can be reduced.

≪Embodiment 14≫
The lower packing 635D of the upper door 31 and the upper packing 635E of the lower door 32 according to the fourteenth embodiment will be described with reference to FIG. 34. In the fourteenth embodiment, the shapes of the lower packing 635D and the upper packing 635E are different from those of the first to thirteenth embodiments. Other configurations may be the same as those in Embodiments 1 to 13, and descriptions of similar configurations, operations, and effects will be omitted.

As shown in FIG. 34, the lower packing 635D of the fourteenth embodiment has a vertical dimension that gradually decreases from one end (for example, the right end) to the other end (for example, the left end) in the width direction. It is designed to. On the other hand, the upper packing 635E is designed such that the vertical dimension gradually increases from one end (right end) to the other end (left end) in the width direction. The dimensions in which the lower packing 635D and the upper packing 635E overlap in the vertical direction are equal in the width direction. Further, the lower packing 635D and the upper packing 635E are not provided with slits.

According to such a configuration, the overlapping portion between the lower packing 635D and the upper packing 635E is not horizontal but is inclined, and the overlapping portion is displaced in the vertical direction by opening and closing the doors 31 and 32. As a result, when the lower packing 635D and the upper packing 635E are inserted incorrectly, the force acting on the deflection is easily released, and the incorrect insertion (twisting) of the lower packing 635D and the upper packing 635E can be appropriately resolved. can. In the example shown in FIG. 34, the overlapping portions of the packings 635D and 635E are inclined downward toward the right. There is no limitation in the range of displacement in the vertical direction. For example, the overlapping portions of the packings 635D and 635E may be inclined downward toward the left, may be inclined downward toward the center in the width direction (V-shape), or may be inclined downward toward the center in the width direction, or may be inclined downward toward the center in the width direction (V-shape), or It may also be tilted downward toward the target (inverted).

≪Embodiment 15≫
The lower packing 735D of the upper door 31 and the upper packing 735E of the lower door 32 according to the fifteenth embodiment will be described with reference to FIG. 35. In the fifteenth embodiment, the shapes of the lower packing 735D and the upper packing 735E are different from those of the first to fourteenth embodiments. Other configurations may be the same as those in Embodiments 1 to 14, and descriptions of similar configurations, operations, and effects will be omitted.

FIG. 35(A) is a cross-sectional view of a state in which the lower packing 735D is fixed to the lower surface of the upper door 31 and the upper packing 735E is fixed to the upper surface of the lower door 32, and the solid line in FIG. 35(B) indicates the lower packing 735D. and a perspective view showing only the upper packing 735E, and the imaginary line shows the state of the lower packing 735D when the upper door 31 is opened. As shown in FIG. 35, the upper packing 735E of the lower door 32 is thicker and has relatively higher rigidity than the sheet-like packings of embodiments 8 to 14, and has a lower end surface. It is fixed to the upper surface of the door 32 with adhesive, double-sided tape, or the like. The longitudinal dimension of the upper packing 735E is similar to the sheet-like packings of embodiments 8 to 14, but the width direction dimension is different from that of the sheet-like packings of embodiments 8 to 14. It's small. Further, the lower packing 735D of the upper door 31 has a thin part 735L extending from the lower end of the upper packing 735E. It is fixed. The thickness of the thin portion 735L is thin, and it can be easily bent compared to the sheet-like packing of the eighth to fourteenth embodiments.

When the door is closed, the thick part of the lower packing 735D and the upper packing 735E do not contact each other, but the thin part 735L extending downward from the thick part of the lower packing 735D comes into elastic contact with the upper end of the upper packing 735E from behind. There is. With such a configuration, the space between the upper door 31 and the lower door 32 can be sealed by the lower packing 735D and the upper packing 735E. Note that when the upper door 31 is closed after the lower door 32 is closed, the thin wall portion 735L also seals the gap between the upper door 31 and the lower door 32 by abutting the upper end of the upper packing 735E from the front. be able to. Furthermore, since the rigidity of the thin wall portion 735L of the lower packing 735D and the upper packing 735E is significantly different, a situation where the lower packing 735D (thick wall portion) and the upper packing 735E are interchanged (twisted) in the front-rear direction does not occur. sea bream. Thereby, the gap between the upper door 31 and the lower door 32 can be sealed more reliably. Furthermore, since the thin wall portion 735L has increased flexibility, contact resistance with the upper packing 735E can be kept low. As a result, the doors 31 and 32 can be opened and closed smoothly. Note that the method of fixing the doors 31, 32 to the lower packing 735D and the upper packing 735E is not limited to the above example (the same applies to the following embodiments).

≪Embodiment 16≫
The lower packing 835D of the upper door 31 and the upper packing 835E of the lower door 32 according to the 16th embodiment will be described with reference to FIG. 36. In the sixteenth embodiment, the shapes of the lower packing 835D and the upper packing 835E are different from those of the first to fifteenth embodiments. Other configurations may be the same as those in Embodiments 1 to 15, and descriptions of similar configurations, operations, and effects will be omitted.

FIG. 36 is a sectional view (A) and a front view (B) of a state in which a lower packing 835D is fixed to the lower surface of the upper door 31 and an upper packing 835E is fixed to the upper surface of the lower door 32. Both the lower packing 835D and the upper packing 835E have an elongated triangular prism shape, and a cross section perpendicular to the longitudinal direction forms an isosceles triangle with a narrow base. The lower packing 835D and the upper packing 835E are fixed to the lower surface of the upper door 31 and the upper surface of the lower door 32 with an adhesive or the like on the surfaces corresponding to the above-mentioned bottom sides. The vertical dimension (dimension corresponding to the height of an isosceles triangle) of the lower packing 835D and the upper packing 835E is such that their tips abut each other when the door is closed. In other words, the structure is such that the overlap margin when the door is closed is reduced.

According to the above configuration, the lower packing 835D and the upper packing 835E become thinner and more flexible toward the tips, and the packings 835D and 835E are twisted when the doors 31 and 32 are opened and closed. It is said to be a difficult structure. In addition, the cross-sectional shape of the packings 835D and 835E is triangular, making it easy to maintain the rigidity and balance between the tip (apex side) and base end (bottom side) even when using various materials. Can be adjusted.

≪Embodiment 17≫
A lower packing 935D of the upper door 31 and an upper packing 935E of the lower door 32 according to the seventeenth embodiment will be described with reference to FIG. 37. In the seventeenth embodiment, the shapes of the lower packing 935D and the upper packing 935E are different from those of the first to sixteenth embodiments. Other configurations may be the same as those in Embodiments 1 to 16, and descriptions of similar configurations, operations, and effects will be omitted.

Both the lower packing 935D and the upper packing 935E are long thick plates having substantially the same dimensions in the width direction and front-rear direction as the doors 31 and 32, and are attached to the lower surface of the upper door 31 and the upper surface of the lower door 32. Each is fixed with adhesive or the like. The lower packing 935D and the upper packing 935E have a plurality of protrusions (seven in FIG. 37) with a triangular cross section on the surfaces facing each other when the door is closed, forming a ridge shape extending in the longitudinal direction. The orthogonal cross section has a zigzag shape as a whole. The lower packing 935D and the upper packing 935E are configured to abut each other at the tips of these protrusions when the door is closed.

According to the above configuration, when the door is closed, the lower packing 835D and the upper packing 835E come into contact at the tips of the plurality of protrusions, so that a plurality of seals are formed along the thickness direction of the doors 31 and 32. It happens. Furthermore, an air layer is formed between adjacent ridges. This makes it possible to highly improve the airtightness and heat retention (insulation) of the hot storage.

≪Embodiment 18≫
A hot storage according to Embodiment 18 will be described with reference to FIG. 38. The heating cabinet of Embodiment 18 is different from Embodiments 1 to 17 in the structure of the upper door 131 and lower door 132 and the sealing structure of the gap therebetween. Other configurations may be the same as those in Embodiments 1 to 17, and descriptions of similar configurations, operations, and effects will be omitted.

As shown in FIG. 38(A), the lower end of the upper door 131 is provided with a hollow packing chamber 131A extending in the width direction at the center portion in the thickness direction (front-back direction when the door is closed). There is. The packing chamber 131A is opened at both ends in the width direction to the left and right side surfaces 31B and 31C of the upper door 131, and is opened at the upper end through a linear opening 131B provided along the width direction at the lower end of the packing chamber 131A. It opens at the bottom of the door 131. The dimension in the thickness direction of the packing chamber 131A is designed to be larger than the dimension in the thickness direction of the opening 131B, and the dimension in the height direction of the packing chamber 131A is designed to be larger than the dimension in the thickness direction of the packing chamber 131A. There is. Further, the upper surface of the lower door 132 has a chevron shape in which the central portion along the thickness direction protrudes upward throughout the width direction. A packing 146 is installed in the packing chamber 131A to seal between the lower surface of the upper door 131 and the chevron-shaped upper surface of the lower door 132.

As shown in FIG. 38(B), the packing 146 is mainly composed of a long sheet-shaped seal portion 146B corresponding to the widthwise dimension of the doors 131, 132, and the short side of the seal portion 146B A thick head 146A is provided along one end of the direction. The head 146A of this example has an elliptical cross section perpendicular to the longitudinal direction, and a seal portion 146B extends along its long axis. The other end of the seal portion 146B has a tapered shape with tapers on both sides. The dimension in the thickness direction of the seal portion 146B is smaller than the dimension in the thickness direction of the opening 131B, and the dimension in the thickness direction of the head 146A is larger than the dimension in the thickness direction of the opening 131B. It is designed to be smaller than the dimensions of In addition, the dimension of the seal portion 146B in the lateral direction (vertical direction) is slightly larger than the dimension from the bottom of the packing chamber 131A to the top of the upper surface of the lower door 132 when the door is closed, and the dimension of the entire packing 146 in the height direction. is designed to be smaller than the dimension from the ceiling surface of the packing chamber 131A to the top of the upper surface of the lower door 132 when the door is closed. This packing 146 has slightly higher rigidity than the packing 34 of Embodiments 1 to 17, so it is difficult to bend, and is made of a material with low friction and good sliding properties. Examples of such materials include, but are not limited to, silicone resins with low sliding properties, fluororesins, nitrile silicone rubbers, and the like.

The head 146A of the packing 146 is inserted into the packing chamber 131A from the opening at the end in the width direction of the upper door 131 with the seal portion 146B inserted into the opening 131B. is attached to the bottom end of the In the open state, as shown by the solid line in FIG. 38(A), the head 146A of the packing 146 is caught on the bottom of the packing chamber 131A due to its own weight, and the seal portion 146B hangs down from the upper door 131. When the door is closed, the lower end of the seal portion 146B of the packing 146 first comes into contact with the upper surface of the lower door 132, and the lower end is gradually displaced upward along the upper surface. When the doors 131, 132 are completely closed, 38(A), the packing 146 is lifted up by the upper surface of the lower door 132 and placed upward inside the packing chamber 131A. Thereby, the space between the upper door 131 and the lower door 132 is sealed. Note that the openings at both widthwise ends of the packing chamber 131A after the packing 146 is attached may be sealed with a lid member or the like.

According to the above configuration, the packing 146 arranged inside the upper door 131 can move up and down inside the packing chamber 131A. That is, when the packing chamber 131A is closed, the packing 146 contacts the top surface of the lower door 132 at its lower end below the packing chamber 131A, and is then pushed up by the lower door 132 and moved above the packing chamber 131A to a wide height position. can maintain a sealed state. The vertical movement of the packing 146 is performed by the weight of the packing 146 and by the opening/closing operations of the doors 131 and 132, so that no other driving force (for example, magnetic force in the embodiment described later) is required. Thereby, the space between the upper door 131 and the lower door 132 can be sealed without being affected by variations in manufacturing dimensions of the packing 146 or variations in the dimensions of the gap between the upper door 131 and the lower door 132.

≪Embodiment 19≫
A hot storage according to Embodiment 19 will be described with reference to FIG. 39. In the heating refrigerator of the nineteenth embodiment, the shape of the packing 246 is different from that of the eighteenth embodiment. Other configurations may be the same as those in Embodiment 1 to Embodiment 18, and descriptions of similar configurations, operations, and effects will be omitted.

As shown in FIG. 39(B), the packing 246 is different from the packing 146 of the eighteenth embodiment in the shape of the head 246A and the shape of the tip of the seal portion 246B. The cross section perpendicular to the direction is approximately circular, and the cross section at the tip of the seal portion 246B is also approximately circular. The dimensions in the thickness direction and the height direction (that is, equivalent to the diameter) of the head 246A are larger than the dimensions in the thickness direction of the opening 131B, and smaller than the dimensions in the thickness direction of the packing chamber 131A. The dimensions in the thickness direction and the height direction (that is, equivalent to the diameter) of the substantially circular portion at the tip of the seal portion 246B are set to be slightly larger than the dimension in the thickness direction of the seal portion 246B. According to such a configuration, the tip of the seal portion 246B of the packing 246 is prevented from being worn out due to sliding between the tip of the seal portion 246B and the upper surface of the lower door 132 as the doors 131 and 132 are opened and closed. Thereby, the durability of the packing 246 can be extended.

≪Embodiment 20≫
A hot storage according to Embodiment 20 will be described with reference to FIG. 40. The heating refrigerator of Embodiment 20 is different from Embodiments 1 to 19 in the sealing structure between the upper door 31 and the lower door 32. Other configurations may be the same as those in Embodiments 1 to 19, and descriptions of similar configurations, operations, and effects will be omitted.

Brush-like members 346 each having a large number of fibrous bristles densely planted are fixed to the lower surface of the upper door 31 and the upper surface of the lower door 32 so that the fiber axis direction is along the vertical direction. The brush-like member 346 is provided across the width direction of the doors 31, 32, and the bristles are arranged in a plurality of rows in the thickness direction of the doors 31, 32. The brush-like member 346 provided on the lower surface of the upper door 31 and the brush-like member 346 provided on the upper surface of the lower door 32 have a length such that their tips contact each other (overlap in front view) when the doors are closed. It is designed to. In the brush-like member 346, there is no particular restriction on the material constituting the bristles, and for example, the bristles may be made of various synthetic resins such as polyethylene and polypropylene.

In the brush-like member 346, since the bristles are densely arranged in multiple rows, it is possible to block the flow of air in the gap between the upper door 31 and the lower door 32. Furthermore, since the single bristles constituting the brush-like member 346 are thin, the bristles from the upper door 31 and the bristles from the lower door 32 can alternately enter the gap, and the brush-like member 346 of the upper door 31 can alternately enter the gap. The brush-like member 346 of the lower door 32 will not be misplaced (twisted). Therefore, even with such a configuration, the gap between the upper door 31 and the lower door 32 can be sealed.

≪Embodiment 21≫
A hot storage according to Embodiment 21 will be described with reference to FIG. 41. The heating refrigerator of Embodiment 21 is different from Embodiments 1 to 20 in the sealing structure between the upper door 31 and the lower door 32. Other configurations may be the same as those in Embodiment 1 to Embodiment 20, and descriptions of similar configurations, operations, and effects will be omitted.

Flexible cylindrical tubular members 446 are fixed to the lower surface of the upper door 31 and the upper surface of the lower door 32 by adhesive or the like in the width direction of the doors 31 and 32, respectively. This tubular member 446 can flex when an external force is applied and return to its original shape when the external force is removed. The tubular member 446 provided on the lower surface of the upper door 31 and the tubular member 446 provided on the upper surface of the lower door 32 have substantially circular cross sections in the free state when the doors are opened. However, when the doors are closed, the tube diameter, tube wall thickness, etc. are designed so that they fit in the gap between the upper door 31 and the lower door 32 in a state where they are separated from each other. The material constituting the tubular member 446 is not particularly limited as long as it has flexibility as described above, and may be made of various synthetic resins such as polyethylene and polypropylene, for example.

The tubular member 446 provided on the upper door 31 and the lower door 32 fits in the gap between the upper door 31 and the lower door 32 when the doors are closed, thereby preventing air from flowing in the gap between the upper door 31 and the lower door 32. The flow can be blocked. With such a configuration as well, the gap between the upper door 31 and the lower door 32 can be sealed.

≪Embodiment 22≫
A hot storage according to Embodiment 22 will be described with reference to FIG. 42. The heating refrigerator of Embodiment 22 is different from Embodiments 1 to 21 in the sealing structure between the upper door 31 and the lower door 32. Other configurations may be the same as those in Embodiments 1 to 21, and descriptions of similar configurations, operations, and effects will be omitted.

On the lower surface of the upper door 31, a gel-like member 546A that is solid but has a gel-like appearance similar to a liquid is fixed across the width direction of the upper door 31 with an adhesive or the like. This gel-like member 546A may be any material as long as it can easily deform when external force is applied and return to approximately its original shape when the external force is removed. Such a gel-like member 546A can typically be made of a gel-like resin with a low crosslinking density (for example, silicone gel), but it can be formed by filling a flexible resin sheet with a liquid. may be configured. A cross section of the gel-like member 546A along the thickness direction of the door 31 has a semicircular shape in the free state when the door is opened.
An elastic member 546B having elasticity is fixed to the upper surface of the lower door 32 with adhesive or the like across the width direction of the lower door 32. This elastic member 546B can be made of an elastic material (for example, silicone rubber). A cross section of the elastic member 546B along the thickness direction of the door 32 has a semicircular shape.

The gel-like member 546A provided on the lower surface of the upper door 31 deforms while contacting the elastic member 546B provided on the upper surface of the lower door 32 when the door is closed, and the upper surface of the elastic member 546B and the lower surface of the upper door 31 deform. It is designed to fit in the space between the two. Thereby, the flow of air in the gap between the upper door 31 and the lower door 32 can be blocked. Moreover, since the gel-like member 546A contacts the elastic member 546B in a stretched state, it has a large area and blocks the gap between the upper door 31 and the lower door 32. Thereby, the gap between the upper door 31 and the lower door 32 can be sealed more reliably.

≪Embodiment 23≫
A hot storage according to Embodiment 23 will be described with reference to FIG. 43. The heating refrigerator of Embodiment 23 is different from Embodiments 1 to 22 in the sealing structure between the upper door 31 and the lower door 32. Other configurations may be the same as those in Embodiments 1 to 22, and descriptions of similar configurations, operations, and effects will be omitted.

An elastic member 646D having elasticity is fixed to the upper surface of the lower door 32 with an adhesive or the like across the width direction of the lower door 32. This elastic member 646D can be made of an elastic material (for example, silicone rubber). A cross section of the elastic member 646D along the thickness direction of the door 32 has a rectangular shape.
On the lower surface of the upper door 31, a deformable member 646A is formed by laminating an elastic member 646B having elasticity and a sponge member 646C that can be deformed into a sponge in this order. Fixed. The elastic member 646B may be similar to the elastic member 646D of the lower door 32. The sponge member 646C is made of resin foam, and can easily deform when an external force is applied to it, and return to its original shape when the external force is removed. A cross section of the deformable member 646A along the thickness direction of the door 31 has a semicircular shape in the free state when the door is opened.

The deformable member 646A provided on the lower surface of the upper door 31 contacts the elastic member 646D provided on the upper surface of the lower door 32 when the door is closed, and the sponge member 646C deforms, thereby deforming the upper surface of the elastic member 646D and the upper door. It is designed to fit in a stretched state between the lower surface of 31 and the lower surface of 31. Thereby, the flow of air in the gap between the upper door 31 and the lower door 32 can be blocked. Moreover, since the sponge member 646C contacts the elastic member 646D in a crushed state, it has a large area and blocks the gap between the upper door 31 and the lower door 32. Thereby, the gap between the upper door 31 and the lower door 32 can be sealed more reliably.

≪Embodiment 24≫
A hot storage according to Embodiment 24 will be described with reference to FIGS. 44 and 45. The heating refrigerator of Embodiment 24 is different from Embodiments 1 to 23 in the sealing structure between the upper door 31 and the lower door 32. Other configurations may be the same as those in Embodiments 1 to 23, and descriptions of similar configurations, operations, and effects will be omitted.

As shown in FIG. 44, on the lower surface of the upper door 31, a ferromagnetic member 746A having the property of being attracted to a magnet (ferromagnetism) is fixed with an adhesive or the like across the width direction of the upper door 31. . The ferromagnetic member 746A can be made of a ferromagnetic material (for example, iron, nickel, cobalt, or an alloy containing any of these elements). The cross section of the ferromagnetic member 746A along the thickness direction of the door 31 is rectangular.
On the upper surface of the lower door 32, an extensible member 746B that can be expanded and contracted along the vertical direction is fixed with an adhesive or the like across the width direction of the lower door 32. As shown in FIG. 45, the expandable member 746B includes a bellows part 746D having a bellows structure that is expandable in the vertical direction, and a magnet part 746C disposed above the bellows part 746D. . Although FIGS. 44 and 45 show a rectangular tube-shaped bellows portion 746D having a hollow structure, the shape of the bellows portion 746D is not limited to this, and may be a flat plate shape or the like. The magnet portion 746C is made of a magnetic (magnetized) ferromagnetic material (for example, iron, nickel, cobalt, and an alloy containing any of these elements), and the magnet portion 746C is made of a magnetic (magnetized) ferromagnetic material (e.g., iron, nickel, cobalt, and an alloy containing any of these elements). The cross section along is rectangular.

When the expandable member 746B provided on the upper surface of the lower door 32 is opened, the bellows portion 746D is in a contracted state due to the weight of the magnet portion 746C, as shown in FIG. 44(A). When the door is closed, as shown in FIG. 44(B), the magnet portion 746C is attracted to and magnetically attached to the ferromagnetic member 746A provided on the lower surface of the upper door 31, and the bellows portion 746D is in an extended state. Air flow in the gap between the upper door 31 and the lower door 32 is blocked. Thereby, the gap between the upper door 31 and the lower door 32 can be sealed.

≪Embodiment 25≫
A hot storage according to Embodiment 25 will be described with reference to FIG. 46. The heating refrigerator of Embodiment 25 is different from Embodiments 1 to 24 in the sealing structure between the upper door 31 and the lower door 32. Other configurations may be the same as those in Embodiments 1 to 24, and descriptions of similar configurations, operations, and effects will be omitted.

The sealed structure of the twenty-fifth embodiment has a configuration in which the ferromagnetic member 746A and the magnet portion 746C in the sealed structure of the twenty-fourth embodiment are replaced. That is, as shown in FIG. 46, on the lower surface of the upper door 31, a magnet member 846A made of a magnetic ferromagnetic material is arranged in place of the ferromagnetic member 746A. Further, on the upper surface of the lower door 32, a telescopic member 846B having the same form as the telescopic member 746B of the twenty-fourth embodiment is disposed. A ferromagnetic portion 846C is disposed above the ferromagnetic portion 846C. Even in such a configuration, when the door is opened, the bellows part 846D of the elastic member 846B is contracted by the weight of the ferromagnetic part 846C, and when the door is closed, the ferromagnetic part 846C is connected to the magnet member 846A provided on the lower surface of the upper door 31. The bellows portion 846D is attracted to and magnetically attached, and the bellows portion 846D is in an extended state, blocking the flow of air in the gap between the upper door 31 and the lower door 32. Thereby, the gap between the upper door 31 and the lower door 32 can be sealed.

≪Embodiment 26≫
A hot storage according to Embodiment 26 will be described with reference to FIGS. 47 and 48. The heating refrigerator of Embodiment 26 is different from Embodiments 1 to 25 in the sealing structure between the upper door 31 and the lower door 32. Other configurations may be the same as those in Embodiment 1 to Embodiment 25, and descriptions of similar configurations, operations, and effects will be omitted.

As shown in FIG. 48, semicircular grooves are formed on the left side wall 12B and the right side wall 12C of the greenhouse 11 at positions corresponding to the spaces between the upper door 31 and the lower door 32, respectively. A guide groove member 12F is provided. The groove of the guide groove member 12F connects the vicinity of the lower end of the upper door 31 and the vicinity of the upper end of the lower door 32 in a substantially arc shape. Note that the guide groove member 12F may be embedded in the left side wall 12B and the right side wall 12C.

A sealing member 946 is provided on the upper periphery of the back surface 32A of the lower door 32, as shown in FIG. This sealing member 946 includes a lid portion 946A having a long plate shape, a fixing portion 946C having a long plate shape, and a hinge 946B rotatably connecting the cover portion 946A and the fixing portion 946C. The guide portion 946D protrudes from both ends of the lid portion 946A in the longitudinal direction, respectively. The lengthwise dimension of the lid portion 946A is the same as or slightly smaller than the widthwise dimension of the opening of the greenhouse chamber 11. The fixing portion 946C is attached substantially horizontally to the back surface 32A so that its longitudinal direction runs along the width direction of the lower door 32 and its front plate surface faces the back surface 32A. The lid part 946A is fixed to the fixed part 946C via a hinge 946B so that the plate surfaces are flush with each other without any gaps along the upper end of the fixed part 946C. The hinge 946B rotates around a rotation axis along the longitudinal direction (width direction) so that the lid part 946A can form an angle of 180 degrees (to be flush with the fixed part 946C). At the same time, the rotation of the lid part 946A is restricted so that the lid part 946A does not rotate more than 90 degrees toward the rear with respect to the fixed part 946C. The guide portion 946D of this example is composed of two cylindrical pieces, and the guide portion 946D is formed of two cylindrical pieces, and is located at both ends of the lid portion 946A in the longitudinal direction (width direction) and on the side opposite to the rotation axis. It is arranged so that a part thereof protrudes from 946A.

In the sealing member 946, when the lower door 32 is opened, the lid part 946A is tilted backward at 90 degrees with respect to the fixed part 946C due to its own weight. When the lower door 32 is closed, the guide portions 946D attached to both ends of the lid portion 946A located at 90 degrees first enter the grooves of the guide groove member 12F of the greenhouse chamber 11, respectively. This guide portion 946D is guided upward along the groove as the lower door 32 closes, and increases the angle of the lid portion 946A with respect to the fixed portion 946C. When the lower door 32 is completely closed, the guide portion 946D is disposed at the upper end of the guide groove, and the lid portion 946A is erected substantially vertically so as to be in contact with the back surface 31A of the upper door 31. Make them stand up. With the lower door 32 having such a configuration, when the upper door 31 and the lower door 32 are closed, the air flow in the gap between the upper door 31 and the lower door 32 is blocked by the lid portion 946A in an upright position. Ru. Thereby, the gap between the upper door 31 and the lower door 32 can be sealed.

≪Embodiment 27≫
A hot storage according to Embodiment 27 will be described with reference to FIG. 49. The hot storage of the twenty-seventh embodiment is different from the twenty-sixth embodiment in that a sealing member 1046 is provided on the upper door 31 and the configuration thereof is slightly modified. Other configurations may be the same as those in Embodiment 1 to Embodiment 26, and descriptions of similar configurations, operations, and effects will be omitted.

A sealing member 1046 is provided on the upper periphery of the back surface 31A of the upper door 31. This sealing member 1046 includes a lid portion 1046A, a fixing portion 1046C, a hinge 1046B, a guide portion 1046D, and a regulating member 1046E. The configurations of the lid portion 1046A, the fixing portion 10946C, and the guide portion 1046D are the same as in the twenty-sixth embodiment. The hinge 1046B in this example does not have the function of regulating the rotation angle of the cover 1046A with respect to the fixed part 1046C, and instead, the regulating member 1046E regulates the rotation range of the cover 1046A. ing. The regulating member 1046E of this example is constituted by a tension spring. That is, the fixed part 1046C is attached to the lower peripheral edge of the back surface 31A of the upper door 31, and the plate surface of the cover part 1046A can be flush with the lower edge of the fixed part 1046C without any gaps. As shown, it is fixed to the fixed part 1046C via the hinge 1046B. The regulating member 1046E is connected to the back surface of the fixed portion 1046C and the back surface of the lid portion 1046A, so that the angle formed between the back surface of the fixed portion 1046C and the back surface of the lid portion 1046A is 90 degrees in the free state of the tension spring. Designed.

In the sealing member 1046, when the upper door 31 is opened, the lid portion 1046A is placed in a lifted position at 90 degrees rearward with respect to the fixed portion 946C by the regulating member 1046E. When the upper door 31 is closed, first, the guide parts 1046D attached to both ends of the lid part 1046A at 90 degrees enter the grooves of the guide groove member 12F of the greenhouse chamber 11, respectively. This guide portion 1046D is guided upward along the groove as the upper door 31 closes, and expands the angle of the lid portion 1046A with respect to the fixed portion 1046C against the elasticity of the tension spring. When the upper door 31 is completely closed, the guide portion 1046D is disposed at the lower end of the guide groove, and the lid portion 1046A is pulled down substantially vertically to hang down to a position where it abuts the back surface 32A of the lower door 32. let With the upper door 31 having such a configuration, when the upper door 31 and the lower door 32 are closed, the air flow in the gap between the upper door 31 and the lower door 32 is blocked by the lid portion 1046A in a hanging position. Ru. Thereby, the gap between the upper door 31 and the lower door 32 can be sealed.

≪Embodiment 28≫
A hot storage according to Embodiment 28 will be described with reference to FIGS. 50 and 51. The heating cabinet of the twenty-eighth embodiment is different from the first to twenty-seventh embodiments in the sealing structure between the upper door 31 and the lower door 32. Other configurations may be the same as those in Embodiment 1 to Embodiment 27, and descriptions of similar configurations, operations, and effects will be omitted.

FIG. 50(B) is a diagram of the upper door 31 and the lower door 32 viewed from the back side when the doors are closed, and for reference, the outline of the hot storage and the outline of the opening of the hot storage compartment 11 are shown. They are also shown with imaginary lines.
The same packing 34 as in the first embodiment is provided on the back surfaces 31A and 32A of the upper door 31 and the lower door 32. However, the upper door 31 and the lower door 32 are not provided with the packing support member 36, and the lower packing 35D of the upper door 31 and the upper packing 35E of the lower door 32 are separated from each other by the other packing 35A (not shown). ), 35B, 35C, 35F, 35G, and 35H (not shown), they are arranged along the back surfaces 31A and 32A of the doors 31 and 32. A long upper magnet M1 is provided above the lower packing 35D along the lower packing 35D, and a long lower magnet M2 is provided below the upper packing 35E along the upper packing 35E. There is.

A sealing plate P is disposed on the back surfaces 31A and 32A of the upper door 31 and the lower door 32 so as to span between the upper door 31 and the lower door 32. The sealing plate P has a long, substantially rectangular plate shape made of a ferromagnetic material, is arranged so that its longitudinal direction runs along the width direction of the doors 31 and 32, and is attached to and detached from the upper magnet M1 and the lower magnet M2. It can be magnetically attached at will. The longitudinal dimension of the sealing plate P is larger than the widthwise dimension of the opening of the greenhouse 11, for example, the distance between the centers of the left and right packings 35B, 35C, 35F, 35G of the upper and lower doors 31, 32. The dimensions are approximately equal, and the dimensions in the lateral direction (vertical direction) are such that the upper magnet M1 and the lower magnet M2 can be covered in the upper and lower directions from the rear. When the door is closed, such a sealing plate P crushes the packings 35B, 35C, 35D of the upper door 31 and the packings 35E, 35F, 35G of the lower door 32, as shown in FIG. 31 and the back surfaces 31A and 32A of the lower door 32, the gap between the upper door 31 and the lower door 32 can be closed.

FIG. 51 shows the state of the sealing plate P as the upper door 31 and the lower door 32 are opened and closed. That is, (A) when the door is closed, the sealing plate P is magnetically attached to the upper door 31 and the lower door 32 by the upper magnet M1 and the lower magnet M2. Here, (B) when the upper door 31 is opened, the sealing plate P is removed from the upper door 31 because it is sandwiched between the lower door 32 and the greenhouse 11. In this state, when you try to open the lower door 32 wider than the upper door 31, the sealing plate P first moves together with the lower door 32 while being magnetically attached to the lower door 32, and (C) lower door 32 opens. When the upper door 31 and the lower door 31 have the same degree of opening, the lower door 32 and the upper door 31 are both magnetically attached. (E) When the opening degree of the lower door 32 becomes larger than that of the upper door 31, the sealing plate P magnetically attaches to the upper door 31 and remains in the position of the upper door 31, and the lower door 32, and only the lower door 32 moves. Similarly, when (D) the lower door 32 is opened from the (A) closed state, the sealing plate P is removed from the lower door 32 because it is sandwiched between the upper door 31 and the greenhouse 11. . In this state, when trying to open the upper door 31 wider than the lower door 32, the sealing plate P first moves together with the upper door 31 while being magnetically attached to the upper door 31, and (C) the upper door 31 When the opening degrees of the upper door 31 and the lower door 32 are the same, both the upper door 31 and the lower door 32 are magnetically attached. (F) When the opening degree of the upper door 31 becomes larger than that of the lower door 32, the sealing plate P magnetically attaches to the lower door 32 and remains in the position of the lower door 32, and the upper door 31, and only the upper door 31 moves. In this way, the sealing plate P is arranged on the doors 31, 32 in a state of being magnetically attached to at least one of the upper door 31 and the lower door 32, and closes the gap between the upper door 31 and the lower door 32 when the door is closed. It is designed to.

<Other embodiments>
The technology disclosed herein is not limited to that disclosed in the above embodiments, and, for example, the following aspects are also included within the technical scope disclosed herein. Further, the technology disclosed herein can be implemented in various modified forms without departing from the essence thereof.
(1) In the above embodiment, the packing 34 is made of silicone rubber, but the material constituting the packing 34 is not limited to this. For example, it may be made of a material with low friction and good sliding properties, such as fluororubber or nitrile silicone rubber.
(2) In the above embodiments, a display device, a warning light, an alarm, etc. were mentioned as the notification means, but various known notification means can be employed. Examples of such notification means include notification modes using e-mail, smartphone applications, telephone calls, aroma devices, and the like.
(3) In the above embodiment, the operation details of the hot storage by the control device (heating operation, heat retention operation, etc.) are merely examples, and various other operation methods can be adopted.

1... Hot storage, 10... Hot storage body, 11... Hot storage room, 12B... Left side wall, 12C... Right side wall, 12D, 112D... Back wall, 30... Door, 31, 131... Upper door, 31A, 32A ...Back surface, 32,132...Lower door, 34,146...Packing, 34A...Cylinder part, 34D...Legs, 35D, 135D...Lower packing, 35E, 135E...Upper packing, 36,136...Packing support member, 40... Heating unit, 41, 141...Inner duct, 41A...Main part, 41B...Side part, 41C...Vent hole, 42...Inner heater, 43...Outer duct, 43A...Body part, 43B...Side part, 43C...Vent hole, 44... Outside heater, 46... Fan, 46A... First fan, 46B... Second fan, 50... Wind direction plate, 100, 200, 300, 400, 500... Control device

Claims (9)

A heating cabinet body for accommodating objects to be heated;
a heating unit for heating the inside air of the refrigerator main body;
Equipped with
The heating unit includes:
an inner duct disposed inside the heating refrigerator main body along a vertical direction with respect to a side wall of the heating refrigerator main body;
an outer duct arranged along the vertical direction so as to surround the inner duct inside the refrigerator main body;
a first heating means provided within the inner duct;
a second heating means provided in the outer duct;
a blower mechanism that sends the inside air of the refrigerator main body from above to below to the inner duct and the outer duct;
Equipped with
In the heating refrigerator, the outer duct is provided with a ventilation hole that communicates the inside of the outer duct with the inside of the heating refrigerator main body. The heating refrigerator main body is
A rectangular parallelepiped-shaped greenhouse that opens at the front,
a door that opens and closes the opening of the greenhouse;
It is equipped with
The outer duct is
installed on the back wall that is the side wall opposite to the opening,
a main body spaced apart from the back wall; and side parts extending from both ends of the main body toward the back wall;
It is configured with
The refrigerator according to claim 1, wherein a plurality of the ventilation holes are provided in the main body portion and the side surface portion in the vertical direction. The first heating means and the second heating means are each cord heaters,
Each of the inner duct and the outer duct includes a main body spaced apart from the side wall, and a side surface extending from both ends of the main body in the width direction toward the side wall.
It is configured with
The cord heater is disposed on a surface of the main body facing the side wall, and
The refrigerator according to claim 1 or 2, wherein the blowing mechanism includes a cross-flow type fan that flows air in a direction transverse to a rotation axis of a drum-shaped rotor blade. The refrigerator according to any one of claims 1 to 3, wherein the inner duct and the outer duct are each made of aluminum or an aluminum alloy. The heating refrigerator according to any one of claims 1 to 4, wherein a surface of the inner duct facing the outer duct is provided with a wind direction plate extending toward the outer duct. temperature detection means for detecting the temperature of the inside air;
a control device that controls the operation of the heating unit;
Equipped with
The control device includes:
The first heating means and the second heating means are continuously operated until the temperature of the inside air detected by the temperature detection means reaches a first temperature lower than a preset warming temperature. activate it,
After the temperature of the inside air detected by the temperature detection means reaches the first temperature, the first heating means and the second The heating refrigerator according to any one of claims 1 to 5, further comprising a configuration for intermittently operating the heating means. A temperature detection means for detecting the temperature of the inside air, a clock means, a notification means, a control device,
Equipped with
The control device includes:
The time measuring means measures the elapsed time since heating of the inside air by at least one of the first heating means and the second heating means is started, and
Detecting the temperature of the indoor air by the temperature detection means,
When the elapsed time reaches a predetermined set time, if the detected temperature of the inside air has not reached the predetermined set temperature, the first heating means and the second heating means are activated. It is determined that at least one of the
The refrigerator according to any one of claims 1 to 6, further comprising a configuration for notifying a malfunction by the notifying means. Comprising a clock means, a notification means, and a control device,
Claim 1: The control device is configured to notify the arrival of the first time by the notification means when the elapsed time measured by the timer reaches a preset first time. The hot refrigerator described in any one of items 6 to 6. The refrigerator according to claim 7 or 8, wherein the notification means is at least one selected from the group consisting of a display device, a warning light, and an alarm.

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