JPH04112778A - Infrared light thawing device - Google Patents

Abstract

PURPOSE:To obtain the title simple and inexpensive device equipped with an outer box having a door, an inner box which comprises a far infrared radiating plate, is provided with a duct with a flow inlet and a flow outlet and equipped with an inside thawing chamber, having a heating pipe for heat transfer, a guide plate communicated with the flow outlet and a fan for air blast. CONSTITUTION:A far infrared thawing device is equipped with an outer box 1 openable and closable by a door 12, an inner box 13 which comprises a far infrared radiating plate A0 obtained by flame spraying on the surface of an aluminum plate A1 with a far infrared radiating material A2, has an opening coincident with that of the outer box 11, is fixed in the outer box 11, forms a duct 18 provided with a flow inlet 18a at the opening side and a flow outlet 18b between the inner box and the outer box 11 and furnished with an inside thawing chamber R, a heating pipe 14 which is connected and arranged at the outside of the inner box 13 and transfers heat of a fluid flowing in the pipe to the inner box 13, a guide plate 15 which comprises the far infrared radiating plate A0, set inside the door 12 and forms a passageway 19 communicated with the flow outlet 18b of the duct 18 between an inner plate of the door 12 and the guide plate and a fan 16 which is provided at the outlet side of the passageway 19 and sends air flowing in the duct 18 and the passageway 19 toward the thawing chamber R.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a far-infrared thawing device for thawing frozen foods and the like.

[Conventional technology]

Various types of thawing devices have been proposed in the past, and one of them is Utility Model Application Publication No. 165194/1983, in which the entire wall forming the thawing chamber is made into a sheet heating element that generates far infrared rays. A thawing cabinet is suggested.

[Problem to be solved by the invention]

However, the sheet heating element that generates far infrared rays in the thawing cabinet of the above-mentioned publication is made up of a layer of a semiconductor that generates far infrared rays and a heating wire placed on the back of the heating element, and is expensive. Since this is used on all walls, the product cost is high. The present invention has been made in view of this problem, and an object of the present invention is to provide an inexpensive far-infrared thawing device.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a far-infrared thawing device that includes an outer box having an opening that can be opened and closed by a door, and a far-infrared ray radiator formed by spraying a far-infrared radiator on the surface of an aluminum plate. The radiation plate in is assembled into the outer box with an opening that matches the opening of the outer box, and forms a duct with an inlet and an outlet on the opening side between the outer box and the inner side. A secret to form a thawing chamber,
A heating pipe is connected to the outside of the inner box to transmit the heat of the fluid flowing inside to the inner box, and the far-infrared radiating plate is provided inside the door and serves as an inner plate of the door. a guide plate that forms a passage communicating with an outlet of the duct between the ducts, and a fan that is provided on the exit side of the passage and blows air flowing through the duct and the passage into the thawing chamber; did.

[Actions and effects of the invention]

In the far-infrared thawing device according to the present invention, when fluid is caused to flow in the heating pipe and the fan is driven to rotate,
The far-infrared radiation plate in the inner box is heated by the heat of the fluid transmitted through the heating pipe, and the air heated by the heating pipe in the duct is sucked by the fan and passes through the duct and passage into the defrosting chamber. Air is blown towards and circulated,
The far-infrared radiation plate of the guide plate is heated by this air. Therefore, the above-mentioned air circulation equalizes the temperature distribution inside the thawing chamber, and far-infrared rays are emitted from the entire surface of the inner box and guide plate toward the frozen food placed in the thawing chamber, allowing the frozen food to defrost efficiently. be done. By the way, in the far-infrared decompression device according to the present invention,
The configuration for emitting far infrared rays is a simple and inexpensive configuration consisting of a far infrared radiation plate made by spraying a far infrared radiator on the surface of an aluminum plate and a heating pipe.In particular, the door side is heated by a heating pipe inside the duct. Since an extremely simple and inexpensive configuration consisting of only a far-infrared radiation plate heated by warmed air is adopted, the device can be manufactured at low cost.

【Example】

An embodiment of the present invention will be described below based on the drawings. FIG. 1 shows a far-infrared decompression device according to the present invention,
This far-infrared thawing device includes an outer box 11 with an insulating structure having an opening on the negative side, a door 12 with an insulating structure that opens and closes the opening of the outer box 11, and an inner box assembled inside the outer box ll. 13. Heating pipe 14 and microwave irradiation device 2
o, and a guide plate 15 assembled on the inside of the door 12. It includes a fan 716 and a cover 17. The inner Iw13 has an opening that matches the opening of the outer f111, and has side walls 13a and 13b as shown in the second base.
Outer box 1 at flanges 13c and 13d extending laterally from
Of8.1 is firmly fixed to and supported by the inner side walls 11a and 11b of the outer box 11, and between it and the outer box 11, an inflow of Of8. and leak 01
8b is formed, and a thawing chamber R is formed inside. In addition, the inner box 13 has both flanges 1
Surface of aluminum plate A except for 3c13d (defrosting chamber R side)
Far-infrared emitter (e.g. oxide ceramic) throughout A
The far-infrared radiation plate AII is formed by thermally spraying the far-infrared radiation plate A, and a heating pipe 14 is connected to the outer surface of the far-infrared radiation plate A. The heating pipe 14 transfers the heat of the liquid flowing inside the inner box 13,
In other words, the far-infrared rays are transmitted to each far-infrared radiation plate A@, and are provided in a meandering manner, and the inflow end and outflow end (both not shown) penetrate the outer box 11 in an airtight manner and protrude to the outside. . The temperature and flow rate of the liquid flowing through the heating pipe 14 are controlled by a control device (not shown) based on the temperature of the far-infrared radiation plate A@, and the far-infrared radiation plate A@ is kept at a predetermined temperature (for example, 20 °C). The guide plate 15 is provided inside the door 12 so as to close the opening of the inner box 13 except for the upper part, and has a passage 19 communicating with the outlet 18b of the duct 1B between the guide plate 15 and the inner plate 12a of the door 12. is being molded. Further, the guide plate 15 is composed of the above-mentioned far-infrared radiation plate As, and a large number of heat-absorbing fins (aluminum plates) 15a extending in the vertical direction are provided on the back as shown in FIGS. 1 and 3. ing. The fan 16 blows the air flowing through the duct 18 and the passage 19 into the thawing chamber R, and is provided above the guide plate 15, that is, on the outlet side of the passage 19, together with the cover 17, and its operation is It is controlled by a control device (not shown). The microwave irradiation device 20 is known per se, and is installed in the center of the earthen wall of the inner box 13, and is detected by a thermistor 21 that detects the surface temperature of the frozen food B that is thawed in the thawing chamber R. The set temperature is the set value (θ~-4℃
) or below, the microwave is irradiated, and when the set value is reached, the microwave irradiation is stopped by a control device (not shown). In this embodiment configured as described above, when the frozen food B is placed on the shelf network C of the thawing chamber R and the thermistor 21 is set on the surface of the frozen food B, a switch (not shown) is operated. The control device flows the liquid into the heating pipe 14 while controlling the temperature and flow rate, rotates the fan 16, and operates the microwave irradiation device 20 to irradiate the frozen food B with microwaves. Therefore, when the liquid flows inside the heating pipe 14, the inside 1i
The far-infrared radiation plate A@13 is heated by the heat of the liquid transmitted through the heating pipe 14 and maintained at a predetermined temperature, and the air heated by the heating vibe 14 in the duct 18 is heated by the heat of the liquid transmitted through the heating pipe 14. Air is sucked by the fan I6 and blown toward the thawing chamber R through the duct 18 and the passage 19, and circulates.
The far-infrared radiation plate AI of the guide plate 15 is heated by this air. In this case, the heat absorption fins 15a of the guide plate 15 function effectively, and the far-infrared radiation plate A@ of the guide plate 15 is effectively heated. Therefore, the above-mentioned air circulation makes the temperature distribution inside the thawing chamber R uniform, and the inner box 13 and the guide plate 1
Far-infrared rays are emitted from the entire surface of 5 toward the frozen food B placed in the thawing chamber R, and microwaves are irradiated from the microwave irradiation device 20 to the frozen food B. Thus, when the surface temperature of the frozen food B reaches the set value, the microwave irradiation from the microwave irradiation device 20 is stopped, and thereafter the microwave is irradiated from the entire surface of the inner box 13 and the guide plate 15. Frozen food B is efficiently thawed by the far infrared rays emitted. In this case, as shown in FIG. ). By the way, in the far-infrared thawing device according to this embodiment, as a configuration for emitting far-infrared rays, a far-infrared radiating plate formed by spraying a far-infrared radiator A2 on the surface of an aluminum plate A is used. A simple and inexpensive configuration such as A@ and heating pipe 14,
In particular, on the door 12 side, a far infrared radiation plate A6 is heated by the air heated by the heating pipe 14 in the duct 18.
Since this extremely simple and inexpensive configuration is adopted, the device can be manufactured at low cost. In the above embodiment, the present invention was carried out by providing the microwave irradiation device 20.
It is also possible to implement without providing 0. In this case, as shown in FIG. 4, the surface temperature of frozen food B increases as shown in (3), and the center temperature increases as shown in (4). Further, in the above embodiment, the heat absorbing fin 1 is attached to the guide plate 15.
Although the present invention has been implemented by providing the heat absorbing fins 15a, it is also possible to implement the present invention without the heat absorbing fins 15a.

[Brief explanation of the drawing]

Fig. 1 is a central vertical sectional side view showing an example of a far-infrared thawing device according to the present invention, Fig. 2 is a front view of the door shown in Fig. 1 with the door removed, and Fig. 3 is a view of the guide plate shown in Fig. 1. FIG. 4, a partially enlarged perspective view, is a diagram showing temperature changes during thawing of frozen food. Explanation of symbols 11...outer box, 12...door,
13...Inner box, 14...Heating pipe, 15...
・Guidance plate, 16...Fan, 18...Duct,
18B... Inlet, 18t)... Outlet, 19...
・Aisle, A--Aluminum plate, A--Far infrared radiator, A--Far infrared radiator, R... Thawing chamber. Applicant Hoshizaki Electric Co., Ltd.

Claims (1)

[Claims] The outer box includes an outer box having an opening that can be opened and closed by a door, and a far-infrared radiating plate formed by spraying a far-infrared radiator on the surface of an aluminum plate, and having an opening that matches the opening of the outer box. an inner box assembled inside the outer box to form a duct with an inlet and an outlet on the opening side and a thawing chamber on the inner side; a heating pipe that transfers the heat of the fluid flowing through the inner box to the inner box; and a passage that is formed by the far-infrared radiation plate and is provided inside the door and communicates with the outlet of the duct between the inner plate of the door and the heating pipe that transfers heat of the fluid flowing through the inner box; A far-infrared thawing device comprising: a guide plate for forming a duct, and a fan provided on an exit side of the passageway to blow air flowing through the duct and the passageway into the thawing chamber.