WO2016065970A1 - Steam generator - Google Patents

Abstract

A steam generator comprises a casing (1), a water pipe (2) and an electric heating pipe (3). A water inlet and a steam outlet are formed in different wall surfaces of the casing (1), that is, the water inlet and the steam outlet are not in the same end, the influence caused by heat transfer between the water inlet and the steam outlet is avoided, and the steam temperature is relatively constant. The spiral-shaped water pipe (2) is wound around the electric heating pipe (3), and a very small gap is reserved between the electric heating pipe (3) and the water pipe (2). Therefore, the heat conductivity of the two pipes in direct contact can be reached approximately, and heat conduction can also be carried out through the third-party casing (1). Meanwhile, because the water pipe (2) is directly wound on the electric heating pipe (3) in a spiral mode, the length of the heated pipe is large, the heat energy utilization rate of the whole steam generator is increased obviously as compared with an existing product, the gasification rate can be effectively increased, the steam dryness is improved, and the steam performance is enhanced. In addition, the temperature distribution characteristics on the casing (1) of the steam generator are obvious, the selection of temperature sensing points on a temperature controller and a fuse is facilitated, and accordingly the steam performance of the whole steam generator can be well guaranteed.

Description

Steam generator Technical field

The present invention relates to the field of home appliances, and more particularly to a steam generator.

Background technique

The existing instantaneous heating type steam generator comprises a main body, a water pipe and a heater. The main body is generally made of aluminum or other metal materials. The water pipe and the heater are located inside the main body, the water pipe has a water inlet at one end and a steam discharge port at the other end. The shape of the heater is a U-shape composed of two straight portions and a semicircular portion, and the semicircular portion of the heater has a curled shape, and the copper water pipe is in direct contact with the U-shaped heating pipe for heat conduction.

The water pipe of the steam generator is a U-shaped structure, and the structure has the following two defects: one is that the water inlet and the steam outlet are in the same direction, and the distance is relatively close, and the water inlet enters the cold water with a lower temperature. The steam outlet passes through the steam with higher temperature. The temperature of the two pipes is obviously different, and the heat is transferred through the metal body in the middle of the two ports, so that the steam temperature in the steam outlet is lowered, and the steam dryness is lowered. The steam cleaning effect will be reduced; the other is that the steam generator is generally regulated and protected by a thermostat and a thermal fuse, and the thermostat and the fuse have corresponding specifications and a certain temperature error. This requires a higher selection of the thermostat and the placement point of the fuse, and must be a position that can quickly and accurately reflect the internal temperature change of the steam generator and a relatively constant temperature, and the U-shaped water pipe is designed in the thermostat. And the selection of the temperature point of the fuse is very difficult. The common problem in this type of product on the market is that the steam is not sensitive enough to cause steam. Can be quite different, the performance of the product can not be well protected.

In addition, this type of steam generator is designed to increase the thermal conductivity by directly contacting the water pipe with the heating pipe to shorten the total length of the copper water pipe; however, from the actual situation, the heat transfer efficiency of the direct contact between the water pipe and the electric heating pipe Compared with the heat transfer efficiency between the water pipe and the electric heating pipe through the secondary heat transfer of the metal body having good thermal conductivity, there may be a certain difference in the initial stage of energization. Different, but after the work is stable, there is almost no difference between the two heat conduction methods; on the contrary, because the length of the copper water pipe in the main body of the steam generator is too short, the heat receiving area of the water is too small, resulting in the gasification rate of the entire steam generator. Not high, steam dryness is low.

Summary of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art.

Accordingly, it is an object of the present invention to provide a steam generator which has the advantages of high vaporization gas rate and high dryness.

In order to achieve the above object, the present invention provides a steam generator including: a casing having a water inlet and a steam outlet, wherein the water inlet and the steam outlet are located in the casing a water pipe having a spiral shape, the water pipe being located in the casing, one end extending from the water inlet, the other end extending from the steam outlet; and an electric heating pipe, An electric heating tube is located in the casing, the water pipe is coiled on the electric heating pipe, and the electric heating pipe comprises a first straight pipe section, a bending section and a second straight pipe section connected in sequence, the first straight pipe section Parallel to the second straight pipe section and on the same side of the bending section, and the first straight pipe section and the second straight pipe section both extend out of the casing.

The steam generator provided by the invention has the water inlet and the steam outlet located on different wall surfaces of the casing, that is, not at the same end, without heat transfer between each other, and the steam temperature is relatively constant; the spiral water pipe is surrounded by the electric heating pipe On the upper side, a small gap is reserved between the electric heating pipe and the water pipe, so that the thermal conductivity of the direct contact between the two pipes can be approximated. At the same time, since the water pipe is spirally wound around the periphery of the electric heating pipe, the length of the heated pipe is long. The heat energy utilization rate of the whole steam generator is obviously improved compared with the existing products, which can effectively increase the gasification rate, improve the steam dryness and improve the steam performance; in addition, the temperature distribution on the shell of the steam generator is obvious, and the temperature is obvious. The temperature sensing point of the controller and fuse is very advantageous, so that the steam performance of the entire steam generator can be well protected.

In addition, the steam generator provided according to the above embodiment of the present invention has the following additional technical features:

According to an embodiment of the invention, the bending section is spiral, and the water pipe is coiled outside the first straight pipe section and the second straight pipe section.

The main part of the water pipe and the electric heating section adopts a coil spiral wrap design, and the water pipe is tightly wound around the outside of the electric heating pipe, and the heat energy utilization rate is high, and the assembly space is greatly reduced, and the assembly is easy to be assembled in a narrow space.

According to an embodiment of the invention, the bent section is W-shaped, and the water pipe is coiled outside the bent section and located between the first straight pipe section and the second straight pipe section.

According to an embodiment of the present invention, a first through hole and a second through hole are further defined in the housing, and the first through hole and the water inlet are located on a same wall surface of the housing, The two through holes and the steam outlet are located on the same wall surface of the casing; the water pipe includes a first pipe body and a second pipe body, and the two ends of the first pipe body are respectively from the water inlet and the water inlet The second through hole protrudes from the casing, and two ends of the second pipe body respectively protrude from the steam outlet and the second through hole, and the second through hole An extended end of the first tubular body communicates with an end of the second tubular body extending from the second through hole.

The ends of the first pipe body and the second pipe body are connected, so that the two water pipes are connected to form a single channel having only one water inlet and one steam outlet, and the arrangement of the second pipe body increases the length of the heat pipe, further enhancing The heat energy utilization rate of the steam generator effectively increases the gasification rate of the steam generator and improves the steam dryness, thereby effectively improving the steam performance.

According to an embodiment of the present invention, an end portion of the first pipe body extending from the second through hole and an end portion of the second pipe body extending from the second through hole pass through a silicone tube Connected.

The silicone tube has poor thermal conductivity and can effectively reduce the heat loss of the water pipe exposed outside the steam generator housing.

According to an embodiment of the invention, the water pipe has a diameter of 2 mm or more and 10 mm or less.

The water pipe has a larger diameter design to reduce the risk of clogging the pipe due to scale or other metal oxides, thus effectively extending the life of the steam generator.

According to an embodiment of the invention, the water pipe is a stainless steel water pipe.

Stainless steel has good thermal conductivity and is highly resistant to oxidation, which reduces the risk of clogging pipes due to scale or other metal oxides, further extending the life of the steam generator.

According to an embodiment of the invention, the housing is a rectangular housing.

The shell is mostly rectangular, but it does not define a specific shape. It can be designed according to market needs. Shape, such as trapezoidal, diamond, etc.

According to an embodiment of the invention, the housing is an alloy housing.

According to an embodiment of the invention, the housing is a metal housing.

The metal or alloy material has good thermal conductivity, and can perform secondary heat transfer between the water pipe and the electric heating section, thereby effectively increasing the heat receiving area of the water pipe, thereby improving the heat energy utilization rate of the steam generator and increasing the gasification. Rate, improved steam dryness and improved steam performance.

Additional aspects and advantages of the invention will be apparent from the description of the invention.

DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

1 is a first perspective structural view of a steam generator according to an embodiment of the present invention;

Figure 2 is a front view showing the structure of the steam generator shown in Figure 1;

Figure 3 is a right side view of the steam generator shown in Figure 1;

Figure 4 is a top plan view of the steam generator shown in Figure 1;

Figure 5 is a second perspective view of a steam generator according to an embodiment of the present invention;

Figure 6 is a front view showing the structure of the steam generator shown in Figure 5;

Figure 7 is a right side view of the steam generator shown in Figure 5;

Figure 8 is a top plan view of the steam generator shown in Figure 5.

Wherein, the correspondence between the reference numerals and the component names in FIGS. 1 to 8 is:

1 housing, 2 water pipes, 21 first pipe body, 22 second pipe body, 23 silicone pipe, 3 electric heating pipe, 31 first pipe section, 32 bending section, 33 second straight pipe section.

detailed description

The present invention will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that, not In the case of a conflict, the features of the embodiments and the embodiments of the present application may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the invention, but the invention may be practiced otherwise than as described herein. The limitations of the example.

A steam generator according to some embodiments of the present invention will be described below with reference to FIGS. 1 through 8, wherein in order to clearly show the structure of the water pipe and the electric heating pipe, in FIGS. 1 to 8, the housing will be transparently processed. The water pipes and electric heating in the casing are indicated by solid lines. In addition, in Figs. 5 to 8, the water pipes and the electric heating pipes are transparently treated.

As shown in FIG. 1 and FIG. 8 , a steam generator according to some embodiments of the present invention includes: a casing 1, a water pipe 2, and an electric heating pipe 3,

Specifically, the housing 1 is provided with a water inlet and a steam outlet (not shown), and the water inlet and the steam outlet are located on different wall surfaces of the housing 1, the water tube 2 is spiral, and the water tube 2 is located in the housing. In one, one end protrudes from the water inlet, the other end protrudes from the steam outlet, the electric heating tube 3 is located in the casing 1, the water pipe 2 is coiled on the electric heating pipe 3, and the electric heating pipe 3 includes the first straight connected in turn. The pipe section 31, the bending section 32 and the second straight pipe section 33, the first straight pipe section 31 and the second straight pipe section 33 are parallel to each other and located on the same side of the bending section 32, and the first straight pipe section 31 and the second straight pipe section 33 are both The housing 1 is extended.

In the steam generating device provided by the embodiment, the water inlet and the steam outlet are located on different wall surfaces of the casing, that is, not at the same end, and there is no heat transfer between the two, and the steam temperature is relatively constant; the spiral water pipe is surrounded by the electric heating. On the pipe, a small gap is reserved between the electric heating pipe and the water pipe, so that the thermal conductivity of the direct contact between the two pipes can be approximated, and the heat conduction can be performed through the third-party casing, and at the same time, since the water pipe is directly spirally wound around On the electric heating pipe, the length of the heated pipe is long, and the heat energy utilization rate of the entire steam generator is obviously improved compared with the existing products, which can effectively increase the gasification rate, improve the steam dryness and improve the steam performance; in addition, the steam generator The temperature distribution on the casing is obvious, and the temperature sensing point of the thermostat and the fuse is very favorable, so that the steam performance of the entire steam generator can be well protected.

It should be noted that the water pipe adopts a spiral pipe design, the water storage amount is small, the internal pressure is lower than that of the same type of product, and the internal air pressure is relatively constant, which avoids the steam which is common in the market after the water storage type steam generator is disconnected. Can not stop in time, the steam generator does not rely on other Under the premise of cutting off the valve and other equipment, the shutdown steam stop time is within 3 seconds. Due to the different design of the inlet and outlet ports and the regular spiral arrangement of the water pipes, the surface temperature distribution of the heating elements is relatively regular, for the thermostat and fuse. The temperature sensing specification and the temperature sensing point are very favorable, which is beneficial to adjust and protect the steam generator, and can effectively prevent the heat conduction between the steam outlet and the water inlet, and ensure the steam performance of the steam outlet steam, and the steam temperature is constant. At around 120 °C, the dripping amount is not more than 10 grams in six minutes, so that the cleaning benefit is effectively guaranteed.

Preferably, the water pipe 2 has a diameter of 2 mm or more and 10 mm or less.

The water pipe has a larger diameter design to reduce the risk of clogging the pipe due to scale or other metal oxides, thus effectively extending the life of the steam generator.

Further, preferably, the water pipe 2 is a stainless steel water pipe; as shown in FIGS. 1 to 8, the casing 1 is a rectangular casing.

Stainless steel has good thermal conductivity and strong oxidation resistance, which can reduce the risk of clogging pipes due to scale or other metal oxides, and further extend the service life of steam generators. Of course, water pipes can also adopt other good thermal conductivity and good oxidation resistance. Metal or alloy material.

The housing is mostly rectangular, but it does not define a specific shape, and other shapes such as trapezoids, diamonds, and the like can be designed according to market needs.

Specifically, the housing 1 is an alloy housing;

Alternatively, the housing 1 is a metal housing.

The metal or alloy material has good thermal conductivity, and can perform secondary heat transfer between the water pipe and the electric heating section, thereby effectively increasing the heat receiving area of the water pipe, thereby improving the heat energy utilization rate of the steam generator and increasing the gasification. Rate, improved steam dryness and improved steam performance.

In a specific embodiment of the present invention, as shown in FIG. 1, FIG. 2, FIG. 3 and FIG. 4, the bending section 32 is spiral, and the water pipe 2 is wound around the first straight pipe section 31 and the second straight pipe section 33. .

The main part of the water pipe and the electric heating section adopts a coil spiral wrap design, and the water pipe is tightly wound around the outside of the electric heating pipe, and the heat energy utilization rate is high, and the assembly space is greatly reduced, and the assembly is easy to be assembled in a narrow space.

In another embodiment of the present invention, as shown in FIGS. 5 and 6, the bent portion 32 has a W shape, and the water pipe 2 is wound around the outside of the bent portion 32, and is located at the first straight pipe portion 31 and the second straight portion. Between the pipe segments 33. In this way, the thermal conductivity between the water pipe and the electric heating pipe is further improved, thereby The heat energy utilization rate of the entire steam generator is significantly improved.

In a specific example of the embodiment, as shown in FIG. 7 and FIG. 8 , the housing 1 is further provided with a first through hole and a second through hole (not shown), the first through hole and the water inlet. Located on the same wall surface of the casing 1, the second through hole and the steam outlet are located on the same wall surface of the casing 1. The water pipe 2 includes a first pipe body 21 and a second pipe body 22, and the two ends of the first pipe body 21 are respectively The water inlet and the second through hole protrude from the casing 1. The two ends of the second pipe body 22 respectively protrude from the steam outlet and the second through hole, and the first pipe protrudes from the second through hole. The end of the body 21 communicates with the end of the second tube 22 extending from the second through hole.

The ends of the first pipe body and the second pipe body are connected, so that the two water pipes are connected to form a single channel having only one water inlet and one steam outlet, and the arrangement of the second pipe body increases the length of the heat pipe, further enhancing The heat energy utilization rate of the steam generator effectively increases the gasification rate of the steam generator and improves the steam dryness, thereby effectively improving the steam performance.

Specifically, as shown in FIG. 7, the end portion of the first tube body 21 projecting from the second through hole and the end portion of the second tube body 22 projecting from the second through hole are in communication with each other through the silicone tube 23.

The silicone tube has poor thermal conductivity and can effectively reduce the heat loss of the water pipe exposed outside the steam generator housing.

It should be noted that the end portions connecting the first pipe body and the second pipe body may be other high temperature resistant pipes that can withstand a high temperature of 150 ° C.

In summary, the steam generator provided by the present invention comprises a casing, a water pipe and an electric heating pipe, and the water inlet and the steam outlet are located on different wall surfaces of the casing, that is, not at the same end, and no heat transfer between them is affected. The steam temperature is relatively constant; the spiral water pipe is surrounded by the electric heating pipe, and a small gap is reserved between the electric heating pipe and the water pipe, so that the heat conductivity of the direct contact between the two pipes can be approximated, or a third party can be used. The heat conduction of the shell, at the same time, because the water pipe is spirally wound directly on the electric heating pipe, the length of the heated pipe is long, and the heat energy utilization rate of the entire steam generator is obviously improved compared with the existing products, which can effectively increase the gasification rate and increase the steam. Dryness and improved steam performance; in addition, the temperature distribution on the shell of the steam generator is obvious, and the temperature sensing point of the thermostat and the fuse is very favorable, so that the steam performance of the entire steam generator can be well obtained. Guarantee.

In the description of the present invention, the terms "connected", "connected", etc., should be understood broadly, for example, The "connection" may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In the description of the present invention, the terms "first" and "second" are used for the purpose of description, and are not to be construed as indicating or implying relative importance unless otherwise specifically defined and defined.

In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments" and the like means that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in the present invention. At least one embodiment or example. In the present specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims (10)

A steam generator, comprising: a housing, the housing is provided with a water inlet and a steam outlet, and the water inlet and the steam outlet are located on different wall surfaces of the housing; a water pipe having a spiral shape, the water pipe being located in the casing, one end extending from the water inlet, and the other end extending from the steam outlet; and An electric heating tube, the electric heating tube is located in the housing, the water tube is coiled on the electric heating tube, and the electric heating tube comprises a first straight tube segment, a bent portion and a second straight tube segment which are sequentially connected, The first straight pipe section and the second straight pipe section are parallel to each other and located on the same side of the bending section, and the first straight pipe section and the second straight pipe section both protrude from the casing. The steam generator according to claim 1, wherein The bent section is spiral, and the water pipe is coiled outside the first straight pipe section and the second straight pipe section. The steam generator according to claim 1, wherein The bending section is W-shaped, and the water pipe is coiled outside the bending section and located between the first straight pipe section and the second straight pipe section. A steam generator according to claim 3, wherein a first through hole and a second through hole are further defined in the housing, the first through hole and the water inlet are located on a same wall surface of the housing, the second through hole and the steam outlet The mouth is located on the same wall of the housing; The water pipe includes a first pipe body and a second pipe body, and two ends of the first pipe body respectively protrude from the water inlet and the second through hole, the second pipe body The two ends protrude from the outlet port and the second through hole respectively, and the end of the first pipe extending from the second through hole and the second pass The ends of the second tube from which the holes extend are in communication. A steam generator according to claim 4, wherein An end of the first tube extending from the second through hole and an end of the second tube extending from the second through hole are communicated through a silicone tube. A steam generator according to any one of claims 1 to 5, characterized in that The diameter of the water pipe is greater than or equal to 2 mm and less than or equal to 10 mm. A steam generator according to claim 6 wherein: The water pipe is a stainless steel water pipe. A steam generator according to claim 7, wherein The housing is a rectangular housing. A steam generator according to claim 8 wherein: The housing is an alloy housing. A steam generator according to claim 8 wherein: The housing is a metal housing.

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