CN116182136A - Steam generator for generating high-temperature steam - Google Patents

Abstract

The invention discloses a steam generator for generating high-temperature steam, which relates to the field of steam generating devices, and comprises a casing in which a first heating chamber and a second heating chamber communicated with each other are arranged; a water inlet is connected to the first heating chamber. The heating chamber is connected to introduce evaporation water; the first heating body is used to heat the water in the first heating chamber into steam; the second heating body adopts a bare resistance heating element and is exposed to the second heating chamber, The resistance heating element does not use other media for heat transfer, but is used for direct contact with steam to reheat the steam in the second heating chamber; and the steam outlet is communicated with the second heating chamber for discharging the second heating of steam. The invention can reheat the steam generated by the first heating to obtain steam with higher temperature and lower water content, and has the advantages of small size and fast heating speed.

Description

A steam generator for generating high-temperature steam

technical field

The invention relates to the field of steam generators, in particular to a steam generator for generating high-temperature steam.

Background technique

At present, there is an increasing demand for steam in the field of household appliances. For example, adding steam cooking function to the oven can make food taste better; adding steam function to cleaning products can achieve the effect of sterilization and removal of stubborn stains.

Chinese patent document (CN108591989B) discloses a steam generator, including a housing, a cavity is provided in the housing, the cavity has a liquid inlet, and a piercing port is provided on the housing; A heating device for heating the liquid in the cavity; a nozzle, the nozzle is provided with a steam channel, the steam channel has an inlet and an outlet, and a part of the nozzle is arranged in the cavity so that the steam The channel communicates with the cavity through the inlet, the other part of the nozzle passes through the opening to protrude from the casing, and the nozzle is rotatable relative to the opening.

Taking this technical solution as an example, the steam generating equipment currently on the market generally adopts one-time heating, and the temperature of the generated steam is mostly around 100°C, and the generated steam is a water-steam mixture (higher water content), which cannot meet the needs of customers. The psychological expectations of low-temperature steam disinfection and decontamination are poor, the taste of the cooked food is not rich enough, and the visual effect of steam is not obvious.

Therefore, there is an urgent need to design a steam generator that can heat quickly, have high steam generation efficiency, and can produce high-temperature steam.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a steam generator for generating high-temperature steam, which can reheat the steam generated by primary heating to obtain higher temperature and lower water content of steam.

The object of the present invention is accomplished through the following technical solutions: this steam generator for generating high-temperature steam includes

A housing, in which a first heating chamber and a second heating chamber communicated with each other are provided;

The water inlet communicates with the first heating chamber and is used for introducing evaporation water;

The first heating body is used to heat the water in the first heating chamber into steam;

The second heating body adopts a bare resistance heating element and is exposed in the second heating chamber. The resistance heating element does not use other media for heat transfer, but is used for direct contact with steam, and performs secondary heating on the steam in the second heating chamber. heating; and

The steam outlet communicates with the second heating chamber and is used to discharge the steam after secondary heating.

As a further technical solution, several heat conduction protrusions are arranged on the surface of the shell in the first heating chamber to increase the contact area of water vapor.

As a further technical solution, an upper cover plate is installed on the top of the housing, and the second heating body is externally connected to power through a lug; the water inlet is opened on the housing, and the first heating body and the housing are fixed for heat conduction.

As a further technical solution, the first heating chamber and the second heating chamber are vertically arranged up and down.

As a further technical solution, the steam outlet is opened on the upper cover, and the wiring piece passes through the upper cover.

As a further technical solution, a water vapor isolation plate is provided in the housing to separate the first heating chamber from the second heating chamber, and a circulation gap is left on the water vapor isolation plate for steam to circulate.

As a further technical solution, the first heating chamber and the second heating chamber are arranged left and right along the horizontal direction.

As a further technical solution, the lug pierces through the bottom of the casing, and the steam outlet is opened on the side of the casing away from the water inlet.

As a further technical solution, the inner wall of the housing near the second heating chamber extends to the upper cover plate to form a water vapor isolation plate, and there is a circulation gap between the water vapor isolation plate and the upper cover plate for steam circulation.

As a further technical solution, it also includes a temperature controller installed on the housing and electrically connected to the first heating body for controlling the first heating body so that it is in a safe working state.

The beneficial effects of the present invention are:

1. The first heating body and the second heating body are integrated on one casting (housing), which is small in size and light in weight, making it easy to install the whole machine. The second heating body uses bare resistance heating elements and is exposed in the second heating chamber , direct contact with steam to achieve rapid heating, compared with the existing heating tubes, magnesium oxide powder and outer tubes are omitted, achieving the effects of simple structure, small size and fast heating speed;

2. The first heating chamber and the second heating chamber are separated by a water-vapor separation plate, and the circulation is maintained by the circulation gap, so that the steam generated by the first heating can enter the second heating chamber for secondary heating, reducing the water content of the steam and improving steam temperature;

3. The heat conduction protrusions arranged on the surface of the shell can enhance the heating effect of the first heating body and play the role of auxiliary heating of water and steam in the first heating chamber;

4. The water vapor isolation plate can effectively separate high-temperature steam and low-temperature steam, extend the steam heating path, increase the steam temperature, and avoid direct discharge of low-temperature steam;

5. The spatial position of the second heating body relative to the first heating body can be changed accordingly to meet different installation space requirements;

6. The temperature controller can monitor the heating temperature in real time to realize the over-temperature protection of the steam generator.

Description of drawings

FIG. 1 is a schematic diagram of the three-dimensional structure of Embodiment 1 of the present invention.

Fig. 2 is a three-dimensional structural schematic diagram of Embodiment 1 of the present invention (removing the upper cover plate and the water vapor isolation plate).

Fig. 3 is a three-dimensional structural schematic view of Embodiment 1 of the present invention (with the upper cover removed).

FIG. 4 is a schematic cross-sectional structure diagram of Embodiment 1 of the present invention.

Fig. 5 is a schematic diagram of the three-dimensional structure of Embodiment 2 of the present invention.

Fig. 6 is a three-dimensional structural schematic diagram of Embodiment 2 of the present invention (with the water vapor isolation plate removed).

Fig. 7 is a schematic cross-sectional structure diagram of Embodiment 2 of the present invention.

Explanation of reference numerals: first heating body 1, second heating body 2, temperature controller 3, water inlet 4, steam outlet 5, water vapor isolation plate 6, lug 8, housing 9, first heating chamber 10, The second heating chamber 11 , the circulation gap 12 , the heat conduction protrusion 13 , and the upper cover plate 14 .

Detailed ways

The present invention will be described in detail below in conjunction with accompanying drawing:

Embodiment 1: As shown in accompanying drawings 1 to 4, this steam generator for generating high-temperature steam includes a first heating body 1, a second heating body 2, a temperature controller 3, a water inlet 4, and a steam outlet 5. Water vapor isolation plate 6 , lug 8 , housing 9 , first heating chamber 10 , second heating chamber 11 , circulation gap 12 , heat conduction protrusion 13 and upper cover plate 14 .

With reference to accompanying drawing 4, in housing 9, be provided with water-vapor isolation plate 6 (fixed on the bottom of housing 9 inner wall), water-vapor isolation plate 6 divides the inner cavity of housing 9 into the first heating chamber that is arranged up and down 10 and a second heating chamber 11, the second heating chamber 11 is located above the first heating chamber 10. An upper cover plate 14 is installed on the top of the housing 9 , and the water inlet 4 is opened on the right side of the housing 9 , and the water inlet 4 communicates with the first heating chamber 10 for introducing evaporation water into the first heating chamber 10 . The left side of the water vapor isolation plate 6 is provided with a circulation gap 12 for circulating steam, and the water vapor isolation plate 6 plays the role of extending the steam heating path, increasing the steam temperature, and avoiding the direct discharge of low-temperature steam. The steam outlet 5 is opened on the upper cover plate 14 and is located on the same side as the water inlet 4 . The steam outlet 5 communicates with the second heating chamber 11 and is used to discharge the high-temperature steam after secondary heating. The first heating body 1 is fixedly installed on the bottom of the casing 9. Since the casing 9 is made of a casting, it can directly contact and conduct heat. The first heating body 1 can initially heat the water in the first heating chamber 10 to generate relatively low-temperature steam. Preferably, the second heating body 2 adopts a bare resistance wire (the shape of the resistance wire is not limited or other forms of heating elements can also be used, and it has the advantage of directly contacting the steam without heat transfer through other media), which is arranged in the second heating The chamber 11 can directly contact the steam in the second heating chamber 11 for secondary heating to generate high-temperature steam. The two ends of the second heating body 2 pass through the upper cover plate 14 through the lug 8 and then externally connected to power supply.

Further, several heat conduction protrusions 13 are arranged on the surface of the housing 9 in the first heating chamber 10 (as shown in Figures 2, 3 and 4). The arrangement of the heat conduction protrusions 13 can enhance the heating effect of the first heating body 1 , to play the role of auxiliary heating of water and steam in the first heating chamber 10 .

Further, the thermostat 3 is fixedly installed on the bottom of the housing 9, and the thermostat 3 is electrically connected to the first heating body 1, and is used to monitor the heating temperature in the first heating chamber 10, so that the first heating body 1 (steam Generator) is in safe working condition.

Embodiment 2: As shown in Figures 5-7, the difference from Embodiment 1 is that the first heating chamber 10 and the second heating chamber 11 are arranged left and right along the horizontal direction, and the second heating chamber 11 is located in the first heating chamber. Cavity 10 left. An upper cover plate 14 is also installed on the top of the housing 9, and the water vapor isolation plate 6 is formed by extending the upper cover plate 14 from the inner wall of the housing 9 (near the second heating chamber 11), as shown in Figure 7, the flow gap 12 It is located between the water vapor isolation plate 6 and the upper cover plate 14 . After the two ends of the second heating body 2 are electrically connected by the lug 8, the external power supply is passed through the bottom of the housing 9 again (one end of the lug 8 is electrically connected with the second heating body 2, and the other end of the lug 8 is connected from the housing. 9 Bottom piercing). The steam outlet 5 is set on the side of the housing 9 away from the water inlet 4 (the left side in FIGS. 5-7 ), so as to extend the steam heating path, increase the steam temperature, and avoid direct discharge of low-temperature steam.

In Embodiment 1, since the second heating body 2 (second heating chamber 11) is located above the first heating body 1 (first heating chamber 10), the size of the steam generator in the length direction will be reduced, which is suitable for In the scene where the installation is limited in the length direction and the space in the height direction is relatively ample. In Example 2, since the second heating body 2 (the second heating chamber 11) is located on the left side of the first heating body 1 (the first heating chamber 10), the size of the steam generator in the height direction will be reduced. In the scene where the installation is limited in the height direction and the space in the length direction is relatively ample. Considering the installation space requirements of the customer's complete machine, the relative positions of the first heating body 1 and the second heating body 2 are not limited to the above two.

The working process of the present invention: when in use, the evaporation water is introduced into the first heating chamber 10 from the water inlet 4, and the first heating body 1 heats the first heating chamber 10 through the heat conduction of the shell 9, and the water in the first heating chamber 10 Water and steam can also be assisted in heating through the heat conduction protrusions 13 . Subsequently, the low-temperature steam generated in the first heating chamber 10 enters the second heating chamber 11 through the circulation gap 12 , is further heated by the second heating body 2 , and generates high-temperature steam with low water content, and is finally discharged from the steam outlet 5 . The water vapor separation plate 6 effectively separates high-temperature steam from low-temperature steam, prolongs the heating path of the steam, increases the temperature of the steam, and avoids the direct discharge of low-temperature steam. At the same time, the temperature controller 3 controls the first heating body 1 in real time to keep it in a safe working state.

It can be understood that, for those skilled in the art, equivalent replacements or changes to the technical solutions and inventive concept of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims (10)

1. A steam generator for generating high temperature steam, characterized by: comprising

A housing (9), wherein a first heating cavity (10) and a second heating cavity (11) which are communicated with each other are arranged in the housing (9);

a water inlet (4) communicated with the first heating cavity (10) for introducing water for evaporation;

a first heating body (1) for heating water in the first heating chamber (10) to steam;

the second heating body (2) adopts a bare resistance heating element and is exposed in the second heating cavity (11), and the resistance heating element is used for directly contacting steam without heat transfer by other mediums so as to secondarily heat the steam in the second heating cavity (11); and

and the steam outlet (5) is communicated with the second heating cavity (11) and is used for discharging steam after secondary heating.

2. The steam generator for generating high temperature steam according to claim 1, wherein: a plurality of heat conduction bulges (13) are arranged on the surface of the shell (9) in the first heating cavity (10) and are used for increasing the water vapor contact area.

3. The steam generator for generating high temperature steam according to claim 2, wherein: an upper cover plate (14) is arranged at the top of the shell (9), and the second heating body (2) is externally connected with power supply through a wiring lug (8); the water inlet (4) is formed in the shell (9), and the first heating body (1) and the shell (9) are fixed and conduct heat.

4. A steam generator for generating high temperature steam according to claim 3, wherein: the first heating cavity (10) and the second heating cavity (11) are arranged up and down along the vertical direction.

5. The steam generator for generating high temperature steam according to claim 4, wherein: the steam outlet (5) is formed in the upper cover plate (14), and the wiring lug (8) penetrates out of the upper cover plate (14).

6. The steam generator for generating high temperature steam according to claim 5, wherein: the steam heating device is characterized in that a steam isolation plate (6) is arranged in the shell (9) and used for isolating the first heating cavity (10) from the second heating cavity (11), and a circulation gap (12) is reserved on the steam isolation plate (6) for steam circulation.

7. A steam generator for generating high temperature steam according to claim 3, wherein: the first heating cavity (10) and the second heating cavity (11) are arranged left and right along the horizontal direction.

8. The steam generator for generating high temperature steam according to claim 7, wherein: the wiring piece (8) penetrates out of the bottom of the shell (9), and the steam outlet (5) is formed in one side, far away from the water inlet (4), of the shell (9).

9. The steam generator for generating high temperature steam according to claim 8, wherein: the upper cover plate (14) extends to form a water vapor isolation plate (6) on the inner wall of the shell (9) close to the second heating cavity (11), and a circulation gap (12) is reserved between the water vapor isolation plate (6) and the upper cover plate (14) for steam circulation.

10. The steam generator for generating high temperature steam according to any one of claims 1 to 9, wherein: the temperature controller (3) is arranged on the shell (9) and is electrically connected with the first heating body (1) and used for controlling the first heating body (1) to be in a safe working state.

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