WO2007079654A1

WO2007079654A1 - A steam generator for a microwave oven

Info

Publication number: WO2007079654A1
Application number: PCT/CN2006/003594
Authority: WO
Inventors: Huikun Xiao
Original assignee: Tsann Kuen(China) Enterprises Co., Ltd.
Priority date: 2005-12-27
Filing date: 2006-12-26
Publication date: 2007-07-19
Also published as: CN2874311Y; DE212006000082U1

Abstract

A steam generator for a microwave oven is provided. The steam generator includes a steam generating tube (1), a heat conductor (2) and an electric heating tube (3), both of tubes are provided in the heat conductor (2) by an integrative die-casting. Two ends of the electric heating tube outside the heat conductor (2) are power connectors (31,32), two ends of the steam generating tube (1) outside the heat conductor (2) are an inlet (11) for water and an outlet (12) for steam, respectively. The inlet (11) for water is connected to a pump (6), and the outlet (12) for steam is connected to the chamber of the microwave oven.

Description

Steam generating device for microwave oven

The present invention relates to the field of microwave ovens, and more particularly to a steam generating device for a microwave oven. Background technique

The main principle of a microwave oven is to achieve cooking of food by converting electrical energy into high-frequency microwave energy to generate heat energy by acting on water molecules in the food. Therefore, in the microwave cooking process, the food will lose more water, making the food dry and hard. Moreover, when cooking large-volume foods, it is prone to dryness of the food surface and insufficient internal heat. In response to this problem, many manufacturers have designed microwave ovens with a steam generation system that allows the microwave oven to have a steam cooking function to ensure that the food remains sufficiently hydrated after steaming through the microwave oven.

The steam generating system of the prior art microwave oven has two main forms. The first type is Chinese patent

CN200320118994. "Microwave oven equipped with steam generating device" disclosed in No. 4, the main structure thereof comprises a microwave oven body, a control panel and a control circuit, and a detachable steaming frame, a water drop generating mechanism and a steam generating mechanism are arranged in the cavity of the furnace. The mechanism is connected to the control circuit, and the water droplets dripping through the dropper fall on the heating plate to generate steam to cook the food, so that the food maintains sufficient moisture. The heating plate has a heating element inside, and the bottom surface is closely attached to the cavity of the microwave cavity. After a long time, the cavity is deformed; dirt is deposited in the heating plate, and the steam generated is not clean.

The second type of "microwave oven with steam cooking function" disclosed in Chinese Patent No. CN200320118995. 9 is mainly composed of a microwave oven cavity and a microwave transmitting device. The microwave transmitting device is connected to the control panel through a control circuit, and includes a pass. An aluminum microwave shielding plate for separating the microwave oven cavity into two chambers up and down or left and right, and further comprising a cooking appliance and a steam generating device, wherein the steam generating device and the cooking appliance are respectively located in different chambers, The main principle is to use the microwave energy to act on the water in the steam generating device to generate high-temperature steam, and cook the food in the cooking device by the warm steam. Since the microwave chamber is divided into two chambers, this greatly reduces the space available for placing food;

玛 recognition' The oil or juice produced by the food is easily dropped into the steam generating device, and the water therein is polluted. The steam generated by the sewage affects the hygiene of the food; and the cooking of the food is completely carried out by steam, and the speed is slow. Summary of the invention

The present invention provides a steam generating device for a microwave oven, the main purpose of which is to overcome the following problems caused by a steam generating device of a conventional microwave oven which is disposed in a cavity of a microwave oven: steam which is easily contaminated by food is not clean, Affects hygiene and affects the taste of food; occupies too much space in the microwave oven cavity, resulting in a small space for food placement; the heating unit of the steam generating device easily deforms the microwave oven body.

The invention adopts the following technical solutions: The steam generating device for the microwave oven comprises a steam forming tube, a heat conductor and an electric heating tube, and the electric heating tube and the steam forming tube are integrally die-casted in the heat conductor, and the two ends of the electric heating tube are formed. A power connector exposed outside the surface of the heat conductor, the two ends of the steam forming tube respectively form a water inlet and a steam outlet exposed outside the surface of the heat conductor, and the water inlet is connected with a pump, and the steam outlet is connected to the furnace chamber of the microwave oven.

In the above steam generating device for a microwave oven, the steam forming tube is integrally molded into a double-layer spiral tube in the heat conductor, and the outer end portion of the lower spiral tube forms the water inlet, and the outer end portion of the upper spiral tube The steam outlet is formed, and a center end of the lower spiral tube communicates with a center end of the upper spiral tube.

The steam generating device for a microwave oven further includes a thermistor and a fixing frame thereof. The thermistor is inserted into the heat conducting body in a column shape, the fixing frame covers the thermistor, and the fixing frame is provided with a The wire penetrates into the threading hole of the thermistor, and two fixed wings are formed on both sides of the fixing frame, and the two fixed wings are respectively fixed to the heat conductor by screws.

The steam generating device for a microwave oven further includes a casing covering the outside of the heat conductor, the casing comprising an upper cover, a bottom cover and a frame connected between the circumferences of the two sides; The two sides of the upper edge of the frame body are also outwardly extended to form two convex edges, and the upper cover and the frame body are fixed by a pair of screws and a pair of flanges. The two sides of the lower cover extend outward to form two convex edges, and the corresponding side edges of the lower side of the frame body also extend outward to form two convex edges, and the lower cover and the frame body are fixedly connected by electric welding by two convex edges. . The casing covering the outside of the heat conductor has two fixing brackets that can be supported and fixed in the microwave oven, and the two fixing brackets are formed by extending downwardly and outwardly from the two side edges of the lower side edge of the frame body.

The steam generating device for a microwave oven described above is characterized in that the pump is connected to the water inlet of the steam forming pipe through an L-shaped pipe, and further comprises a fixing frame for fixing the pump in the microwave oven.

From the above description of the structure of the present invention, the present invention has the following advantages compared with the prior art: 1. The steam generating device is completely independent of the cavity of the microwave oven, is not contaminated by food, and the generated steam is always maintained. Clean and hygienic without affecting the taste of the food, and the steam generating device does not occupy the space of the microwave oven cavity. The heating unit of the steam generating device does not contact the microwave oven body and does not deform it. Second, the steam can be removed from the microwave oven cavity. The side wall is sprayed, unlike the conventional steam generating device, the steam is blocked by the food container from the bottom up, so it can be directly sprayed on the food, supplement the water lost by the food, and can degrease and degrease the food; The temperature can be controlled by the thermistor, so that the temperature of the water vapor generated by it can be easily adjusted. 4. The compact structure can be separately produced and then conveniently installed in a microwave oven.

DRAWINGS

Figure 1 is a schematic view of the assembly of the present invention;

2 is a plan view of the present invention after removing a case covered on the outside thereof;

Figure 3 is a front elevational view of the present invention after removing the casing covered on the outside thereof;

Figure 4 is a right side view of the present invention after removing the casing covered on the outside thereof;

Figure 5 is a view taken along the line A-A in Figure 4;

Figure 6 is a B-B direction view of Figure 3;

Figure 7 is a C-C arrow view of Figure 3.

Specific embodiment

Specific embodiments of the present invention will now be described with reference to Figs.

Referring to Fig. 1, the steam generating device for a microwave oven mainly comprises a steam forming pipe 1, a heat conductor 2 and an electric heating pipe 3, and a casing covering the outside of the heat conductor 2, an electric heating pipe 3 and a steam forming pipe 1 Be In one embodiment, the two ends of the electric heating tube 3 are formed with power connectors 31 and 32 exposed outside the surface of the heat conductor 2. The two ends of the steam forming tube 1 are respectively exposed on the surface of the heat conductor 2. The water inlet 11 and the steam outlet 12 are connected to the water inlet 11 through a L-shaped tube 61 to which a pump 6 is connected, and the steam outlet 12 is connected to the furnace chamber of the microwave oven. The pump 6 is provided with a holder 62 that can be fixed in the microwave oven.

A heat-sensitive resistor 4 is disposed on the heat-conducting body 2, and is fixed to the heat-conducting body 2 through a fixing frame 40. The thermistor 4 is inserted into the heat-conducting body 2 in a column shape, and the fixing frame 40 covers the thermistor 4 And the fixing frame 40 is provided with a threading hole for the wire to penetrate and the thermistor 4, and two fixing wings 41 and 42 are formed on both sides of the fixing frame 40. The two fixing wings 41 and 42 can be respectively fixed to the heat conduction by screws. On body 2.

The cover body includes an upper cover 51, a bottom cover 53 and a frame 52 connected between the two edges. The two sides of the upper cover 51 extend outward to form two convex edges 511 and 512, and the upper edge of the frame 52 corresponds to the upper edge. The two sides of the two sides of the pair of flanges 511, 521 and 512, 522 are fixed by welding together by the two sides of the upper cover 51 and the frame 52; The two sides of the cover 53 extend outwardly to form two flanges 531 and 532. The two side edges of the lower edge of the frame 52 also extend outward to form two flanges 523 and 524. The lower cover 53 and the frame 52 pass between each other. The two pairs of flanges 523, 531 and 524, 532 - correspondingly fixed together by welding. The casing has two fixing brackets 525, 526 which are supported to be fixed in the microwave oven, and the two fixing brackets 525, 526 are formed by extending downwardly and outwardly from the two side edges of the lower side edge of the frame 52. Moreover, the frame body 52 of the casing is provided with the power supply joints 31, 32 of the power supply heating pipe 3, and the water inlet port 11 of the steam forming pipe 1 and the hole through which the steam outlet 12 passes, and a through hole is arranged on the top surface of the upper cover 51. The upper end of the holder 40 of the thermistor 4 is exposed to facilitate wiring.

2 to 7, it can be seen that the steam forming tube 1 is a two-layer spiral tube integrally molded in the heat conductor, and the outer end portion of the lower spiral tube 101 forms the water inlet 11, the upper spiral tube The outer end portion of the 102 forms the steam outlet 12, and the center end of the lower spiral tube 101 communicates with the center end of the upper spiral tube 102. This structure of the steam forming tube 1 enables it to transmit heat with the heat conductor 2 sufficiently thermally to improve the heat transfer efficiency.

In use, the steam generating device is installed at a suitable position in the microwave oven, and the pump 6 is connected to the water source. And the thermistor 4, the pump 6 and the power supply terminals 31, 32 of the electric heating tube 3 are all connected to the control circuit of the microwave oven, and are operated by the instruction of the control circuit. When the power is turned on, the electric heating tube 3 is energized to start heating the steam forming tube 1. When the temperature of the electric heating tube 3 reaches a predetermined temperature, the thermistor 4 sends a temperature control signal to the control circuit to control The circuit starts the pump 6 to work, and the water is driven into the steam forming tube 1 from the water inlet 11, and the water is heated in the steam forming tube 1 to form water vapor entering the microwave oven cavity through the steam outlet 12; thereafter, when the heat conductor 2 is When the temperature exceeds an upper limit temperature, the thermistor 4 sends a temperature control signal to the control circuit, and the control circuit disconnects the circuit of the electric heating tube 3 to stop the operation, so that the pump is still in the normal working state, and the pump is continuously Pumping and cooling the heat conductor 2, when the temperature of the heat conductor 2 is lower than a lower limit temperature, the thermistor 4 sends a temperature control signal to the control circuit, and the control circuit turns on the circuit of the electric heating tube 3 to resume operation, thereby The temperature of the heat conductor 2 is controlled within a certain range, and by adjusting the temperature control value of the thermistor 4, the temperature of the heat conductor 2 can be adjusted, so that the temperature of the generated steam can be controlled.

Industrial applicability

The steam generating device of the invention is completely independent of the cavity of the microwave oven, is not polluted by the influence of food, and the generated steam is always kept clean, sanitary without affecting the taste of the food, and the steam generating device does not occupy the space of the microwave oven cavity. The heating unit of the steam generating device does not come into contact with the microwave oven body and does not deform it. Second, the steam can be injected from the side wall of the microwave oven cavity, unlike the conventional steam generating device, the steam receives food from the bottom up. The container is blocked, so that it can be directly sprayed on the food, supplement the moisture lost by the food, and can degrease and degrease the food. Thirdly, the temperature can be controlled by the thermistor, so that the water vapor generated by the food can be easily adjusted. Temperature; Fourth, its compact structure can be separately produced and then conveniently installed in a microwave oven.

The above is only one embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modification of the present invention by this concept should be an infringement of the scope of protection of the present invention.

Claims

Rights request

a steam generating device for a microwave oven, comprising: a steam forming tube, a heat conductor and an electric heating tube; the electric heating tube and the steam forming tube are integrally die-cast in the heat conductor, and the two ends of the electric heating tube are exposed A power connector outside the surface of the heat conductor, the two ends of the steam forming tube respectively form a water inlet and a steam outlet exposed outside the surface of the heat conductor, and the water inlet is connected with a pump, and the steam outlet is connected to the furnace chamber of the microwave oven.

A steam generating apparatus for a microwave oven according to claim 1, wherein: said steam forming tube is a two-layer spiral tube integrally molded in a heat conductor, and an outer end portion of said lower spiral tube forms said The water inlet, the outer end portion of the upper spiral tube forms the steam outlet, and the center end of the lower spiral tube communicates with the center end of the upper spiral tube.

The steam generating device for a microwave oven according to claim 1, further comprising: a thermistor and a fixing frame thereof, wherein the thermistor is inserted into the heat conductor in a column shape, and the fixing frame covers the heat sensitive Above the resistor, the fixing frame is provided with a threading hole for connecting the wire and the thermistor. Two fixing wings are formed on both sides of the fixing frame, and the two fixing wings are respectively fixed to the heat conductor by screws. The steam generating device for a microwave oven according to claim 1, further comprising: a casing covering the outside of the heat conductor, the casing comprising an upper cover, a bottom cover and a connection between the two edges The two sides of the upper cover extend outward to form two convex edges, and the corresponding side edges of the upper side of the frame also extend outward to form two convex edges, and the two pairs of convex edges pass between the upper cover and the frame A pair of screws are locked and fixed together; the two sides of the lower cover extend outward to form two convex edges, and the corresponding side edges of the lower side of the frame also extend outward to form two convex edges, the lower cover and the frame The connection is fixed by electric welding between the two flanges. The steam generating device for a microwave oven according to claim 4, wherein: the casing covered on the outside of the heat conductor has two fixing brackets that can be supported and fixed in the microwave oven, and the two fixing brackets are The two side edges of the lower side edge of the frame body are formed to extend downward and outward.

The steam generating device for a microwave oven according to claim 1, wherein: the pump is connected to the water inlet of the steam forming tube through an L-shaped tube, and further includes a pump for fixing the pump to the microwave oven. Inside the holder.