A steam generator with low noise and cooking equipment

Abstract

The utility model provides a kind of steam generator and cooking equipment of little noise, the steam generator includes heating tube, for heating the water in heat exchange tube to produce steam;Heat exchange tube is arranged in the outer circumferential side of the heating tube and presents spiral ascending structure, the heat exchange tube includes multiple straight pipes, elbow pipe that are alternately arranged and sequentially communicated, the outlet end of the elbow pipe is higher than the import end setting, at least one of multiple the elbow pipe is provided with resistance structure, for reducing the steam pressure of the outlet end of the heat exchange tube.The utility model can form resistance to steam in heat exchange tube by the resistance structure arranged, to reduce the steam pressure of outlet position to reduce noise;The modification to existing structure is very small, and the heating uniformity of heat exchange tube can be further improved, and user experience is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of household appliances, specifically, a steam generator with low noise and cooking equipment. BACKGROUND

[0002] With the increasing attention of consumers to healthy diet, the cooking equipment using high-temperature steam to heat and cook food to complete food processing is favored by consumers; the steam generator is the main component of generating steam, how to realize small size, high power and low cost will be the future research and development trend.

[0003] Therefore, the Chinese patent with the application number 202010460042.9 discloses a steam generator and cooking equipment, the steam generator comprising: a first heater; a first heat exchange pipe arranged at the outer periphery of the first heater, the first heat exchange pipe extending from one end of the first heater to the other end of the first heater and extending back from the other end of the first heater to the one end of the first heater; and a heat conductor arranged between the first heater and the first heat exchange pipe. This scheme can balance the heat exchange capacity of the outer periphery of the first heater to improve the heating stability and reduce the failure rate of the steam generator. However, since the first heat exchange pipe is a regular circle, the resistance in the pipeline is small when high-pressure steam is generated, and the high-pressure steam still maintains a high-pressure state at the outlet end, so a whistling noise (similar to blowing a whistle) is generated when it flows out.

[0004] Therefore, the utility model is proposed. UTILITY MODEL CONTENT

[0005] The problem solved by the utility model is that the unreasonable structure of the existing steam generator causes loud noise.

[0006] To solve the above problems, the utility model provides a steam generator with low noise, comprising:

[0007] A heating pipe is used to heat the water in the heat exchange pipe to generate steam.

[0008] A heat exchange pipe is arranged at the outer periphery of the heating pipe and has a spiral upward structure, the heat exchange pipe comprises a plurality of straight pipes and elbow pipes arranged alternately and connected in sequence, the outlet end of the elbow pipe is arranged higher than the inlet end, and at least one of the plurality of elbow pipes is provided with a resistance structure for reducing the steam pressure at the outlet end of the heat exchange pipe.

[0009] The arrangement can utilize the resistance structure to form resistance to steam to reduce the steam pressure at the outlet end of the heat exchange pipe, thereby reducing the noise generated when the steam flows out of the heat exchange pipe; the spiral structure enables the water that has not been vaporized to flow downward along the inner wall of the pipe under the action of gravity, thereby improving the heat exchange efficiency and effectively preventing the water that has not been vaporized from being sprayed out of the outlet end and finally entering the inner container together with the steam; and the arrangement can also reduce the space occupied and the volume of the heat generating pipe, thereby facilitating the layout and installation of the steam generator and improving the space utilization of the cooking equipment.

[0010] Preferably, the heat exchange pipe has 8-12 bends alternately distributed at the two ends of the heat generating pipe, and the resistance structure is arranged in each of the bends. This arrangement enables the heat exchange pipe 1 to sequentially form a preheating zone, a steam generating zone and a superheating zone from top to bottom, thereby preventing water from flowing out of the outlet pipe during the spiral upward flow; and the combined action of the multiple bends can significantly reduce the steam pressure at the outlet end of the heat exchange pipe 1 to better reduce noise.

[0011] Preferably, the straight pipe and the bends have a circular longitudinal section with an outer diameter D1 of 5.5-6 mm, and the resistance structure is formed by the deformation of one side of the bends under stress and has a deformation amount of 0.5-2 mm. This arrangement can form resistance to the generated steam to reduce noise, and the structure is simple and easy to produce and process.

[0012] Preferably, the resistance structure is located on the side of the bend away from the heat generating pipe, and the projection of the resistance structure on the plane of the heat generating pipe is a straight line segment with an arc corresponding to (1 / 36-1 / 2)*π. This arrangement is simple in structure and easy to produce and process; and it can shorten the distance between the bend and the heat generating pipe, improve the uniformity of the heating of the water in the heat exchange pipe, thereby avoiding poor heating stability and increasing the product competitiveness of the final cooking equipment.

[0013] Preferably, the heat exchange pipe further comprises an inlet pipe and an outlet pipe extending in the horizontal direction, and the inlet pipe is lower than the outlet pipe and is arranged parallel to the straight pipe. This arrangement can arrange one end of the inlet pipe and the outlet pipe away from the heat generating pipe, thereby providing sufficient assembly space for the installation and connection of the steam generator.

[0014] Preferably, the steam generator further comprises a shell made of aluminum alloy, and the shell is wrapped around the heat exchange pipe. This arrangement can not only play a heat preservation role but also provide installation positions for thermal cutters, temperature sensors and the like, thereby facilitating the fixed assembly of the steam generator; in addition, the heat generating pipe is shielded, thereby improving the overall mechanical strength and use safety of the steam generator.

[0015] Preferably, the steam generator further comprises a temperature sensor fixed on the shell and arranged close to the outlet pipe for detecting the temperature of the heating tube, and the temperature sensor and the heating tube are electrically connected with a control module of the cooking device respectively.

[0016] Preferably, the steam generator further comprises a thermal cutout arranged on one side of the shell and electrically connected with the control module of the cooking device.

[0017] The utility model further provides a cooking device which comprises the steam generator with low noise.

[0018] Compared with the prior art, the steam generator with low noise and the cooking device have the following beneficial effects: 1) the resistance structure can form resistance to the steam in the heat exchange tube, thereby reducing the steam pressure at the outlet position to reduce noise; 2) the spiral structure enables the water that has not been vaporized to flow downward along the inner wall of the pipeline under the action of gravity, thereby improving the heat exchange efficiency and effectively preventing the water that has not been vaporized from being sprayed from the outlet end and entering the inner container with the steam; 3) the structure has little change to the existing structure and can further improve the heating uniformity of the heat exchange tube, thereby providing good user experience. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 FIG. 1 is a schematic view of the steam generator with low noise according to an embodiment of the utility model;

[0020] Figure 2 FIG. 2 is a longitudinal sectional view of the steam generator with low noise according to an embodiment of the utility model;

[0021] Figure 3 FIG. 3 is an assembly view of the heat exchange tube and the heating tube according to an embodiment of the utility model;

[0022] Figure 4 FIG. 4 is a sectional view of the heat exchange tube and the heating tube after assembly according to an embodiment of the utility model.

[0023] REFERENCE SIGNS:

[0024] 1 - heat exchange tube; 101 - straight tube; 102 - bent tube; 103 - inlet tube; 104 - outlet tube; 105 - resistance structure; 2 - heat generating tube; 3 - housing; 4 - thermal cutout; 5 - temperature sensor. DETAILED DESCRIPTION

[0025] In order to make the above objectives, characteristics and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. The technical features of the embodiments of the present application can be combined with each other on the premise of no conflict.

[0026] It should be noted that if the embodiments involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0027] In addition, if the embodiments involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0028] The term "comprising", "containing" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed, or other elements inherent to such a process, method, article or apparatus. Without more limitations, the elements defined by the statement "comprising" do not exclude the presence of additional identical elements in the process, method, article or apparatus including the elements.

[0029] As shown in Figures 1-4 A steam generator with low noise, comprising:

[0030] a heat generating tube 2;

[0031] The heat exchange pipe 1 is arranged at the outer periphery of the heat generating pipe 2 and is in a spiral ascending structure, and the heat exchange pipe 1 comprises a plurality of straight pipes 101 and elbow pipes 102 which are arranged alternately and communicated sequentially, the outlet end of the elbow pipe 102 is arranged higher than the inlet end, and at least one of the plurality of elbow pipes 102 is provided with a resistance structure 105 for reducing the steam pressure at the outlet end of the heat exchange pipe 1.

[0032] Since the liquid water flows in the heat exchange pipe 1 and is heated by the heat generating pipe 2 to form high-pressure steam, the flow direction of the high-pressure steam is changed when passing through the elbow pipe 102, and the water which is not gasified flows downward along the inner wall of the heat exchange pipe 1 under the action of gravity, is further gasified into steam, and prevents the water which is not gasified from being sprayed out of the outlet end and entering the inner container finally with the steam; meanwhile, the resistance structure 105 arranged can form a certain resistance to the steam, and the steam pressure at the outlet end of the heat exchange pipe 1 can be reduced through the joint action of the plurality of elbow pipes 102, thereby reducing the sound of the steam flowing out of the heat exchange pipe 1 instantaneously to effectively reduce the noise; the heat exchange pipe 1 is arranged in a spiral structure, which can reduce the space occupied and the volume of the heat generating pipe 2, facilitates the layout and installation of the steam generator, and improves the space utilization rate of the cooking equipment.

[0033] Preferably, the plurality of elbow pipes 102 are all provided with the resistance structure 105. This arrangement can further increase the fluid resistance in the heat exchange pipe 1, thereby reducing the steam pressure at the outlet end to better reduce the noise. The elbow pipes 102 are 8-12 and are alternately distributed at the two ends of the heat generating pipe 2. This arrangement can form a preheating zone, a steam generating zone and a superheating zone in the heat exchange pipe 1 from top to bottom, and avoid water from flowing out of the outlet pipe 104 in the spiral ascending process.

[0034] As an example of the present application, the longitudinal section of the straight pipe 101 and the elbow pipe 102 is circular and the outer diameter D1 is 5.5-6mm, and the resistance structure 105 is formed by the deformation of one side of part of the elbow pipe 102 under stress and the deformation amount is 0.5-2mm. This arrangement can form resistance to the generated steam to reduce noise, and the structure is simple and convenient for production and processing.

[0035] As an example of the present application, the longitudinal section of the resistance structure 105 is a straight line segment and the corresponding arc is (1 / 36-1 / 2)*π. This arrangement is simple in structure and convenient for production and processing; meanwhile, it can shorten the distance between the elbow pipe 102 and the heat generating pipe 2, improve the uniformity of water heating in the heat exchange pipe 1, thereby avoiding the problem of poor heating stability, and thereby increasing the product competitiveness of the final cooking equipment.

[0036] Preferably, the heat exchange pipe 1 further comprises an inlet pipe 103 and an outlet pipe 104, the inlet pipe 103 is lower than the outlet pipe 104 and both extend in the horizontal direction. This arrangement can set one end of the inlet pipe 103 and the outlet pipe 104 away from the heat pipe 2, so as to provide sufficient assembly space for the installation and connection of the steam generator.

[0037] Preferably, the heat pipe 2 has a power of 1500w and comprises a straight section and a bent section connected to each other. This arrangement can further increase the length of the heat pipe 2 in a limited space, and the heat efficiency is high.

[0038] Preferably, the steam generator with low noise further comprises a shell 3 made of aluminum alloy, and the heat exchange pipe 1 and the heat pipe 2 are located in the shell 3. This arrangement can not only play a heat preservation role, but also provide installation positions for the thermal cutout 4, the temperature sensor 5 and the like, so as to facilitate the fixed assembly of the steam generator; in addition, the heat pipe is shielded, and the overall mechanical strength and use safety of the steam generator are improved.

[0039] Preferably, the steam generator with low noise further comprises a temperature sensor 5, which is arranged on the shell 3 and electrically connected with a control module of a cooking device, and is used for detecting the temperature of the heat pipe 2. Specifically, when the steam generator 100 is used in the cooking device, the inlet pipe 103 of the heat exchange pipe 1 is communicated with a water tank, the outlet pipe 104 of the heat exchange pipe 1 is communicated with a cooking cavity, and the control module of the cooking device is electrically connected with the temperature sensor 5 and the water tank, respectively. The temperature sensor 5 detects the temperature of the heat pipe 2 in real time and feeds back to the control module, and the control module adjusts the water flow of the water tank according to the temperature fed back by the temperature sensor 5, so as to ensure the performance of the steam generator in generating gaseous fluid and the quality of the gaseous fluid. As an example of the utility model, the temperature sensor 5 is an NTC (negative temperature coefficient thermistor), which has the characteristics of simple structure, high sensitivity and low production cost. The temperature sensor 5 can be arranged at any position on the outer surface of the shell 3, and preferably, the temperature sensor 5 is arranged close to the outlet pipe 104 of the heat exchange pipe 1. The temperature at this position is close to the temperature of the discharged steam, so as to improve the detection accuracy.

[0040] Preferably, the steam generator with low noise further comprises a thermal cutout 4, which is arranged on one side of the shell 3 and is electrically connected with the control module of the cooking device. This arrangement can prevent the thermal cutout 4 from occupying the space in the thickness direction of the steam generator, so that the size of the steam generator 100 is further reduced.

[0041] When the steam generator is used in a cooking device, one end of the heat exchange pipe 1 is in communication with the water box, and the other end is in communication with the cooking cavity, the heating pipe 2, the temperature sensor 5 and the thermal cutout 4 are respectively electrically connected with the control module. When steaming cooking is performed, the water in the water tank enters the heat exchange pipe 1 of the steam generator, and the water passing through the heat exchange pipe 1 is heated by the heating pipe 2 to form high-temperature steam and is delivered into the cooking cavity, the temperature sensor 5 monitors the current temperature of the steam generator in real time, and the control module adjusts the flow rate of the water and the heating power of the heating pipe 2 according to the temperature fed back by the temperature sensor 5, so that the temperature of the steam meets the needs of cooking.

[0042] When the temperature of the steam generator is abnormal (the temperature is too high), the thermal cutout 4 is disconnected, and the heating pipe 2 is switched to a power-off state, so that the situation of overheating damage of the steam generator is avoided. The number of the thermal cutout 4 can be one, two or more than two, and when two or more are arranged, the installation position of the thermal cutout 4 can be set according to the detection position of the steam generator.

[0043] The utility model also provides a kind of cooking equipment, including above-mentioned steam generator with little noise. The cooking equipment can be steam oven, steam stove, steam pot, steamer, steamer, steam oven, steam oven and the like. The steam generator provided by the utility model can be used not only in cooking equipment, but also in other devices or systems that work with steam, including but not limited to: steam boiler, steam generator, steam washing machine, steam evaporator, steam cleaner, steam heating system.

[0044] Although the utility model discloses as above, the utility model is not limited to this. Any person skilled in the art, without departing from the spirit and scope of the utility model, can make various changes and modifications, therefore the protection scope of the utility model should be limited by the range defined in claim.

Claims

1. A low noise steam generator, characterized by, The steam generator comprises: a heating tube (2) for heating water in a heat exchange tube (1) to generate steam; the heat exchange tube (1) is arranged at the outer periphery of the heating tube (2) and has a spiral ascending structure, and comprises a plurality of straight tubes (101) and elbow tubes (102) arranged alternately and communicated in sequence, the outlet end of the elbow tube (102) is arranged higher than the inlet end, and at least one of the plurality of elbow tubes (102) is provided with a resistance structure (105) for reducing the steam pressure at the outlet end of the heat exchange tube (1).

2. The low noise steam generator of claim 1, wherein, The number of the elbow tubes (102) is 8-12 and they are alternately arranged at both ends of the heating tube (2), and the resistance structure (105) is arranged on each elbow tube (102).

3. The low-noise steam generator according to claim 1 or 2, characterized in that The longitudinal section of the straight tube (101) and the elbow tube (102) is circular and the outer diameter D1 is 5.5-6 mm, the resistance structure (105) is formed by deforming one side of part of the elbow tube (102) under stress and the deformation amount is 0.5-2 mm.

4. The noiseless steam generator according to claim 3, wherein The resistance structure (105) is located at the side of the elbow tube (102) away from the heating tube (2), the projection of the resistance structure (105) on the plane of the heating tube (2) is a straight line segment and the corresponding arc is (1 / 36-1 / 2)*π.

5. The low noise steam generator of claim 4, wherein, The heat exchange tube (1) further comprises an inlet tube (103) and an outlet tube (104) extending in the horizontal direction, the inlet tube (103) is arranged lower than the outlet tube (104) and parallel to the straight tube (101).

6. The low noise steam generator of claim 1, wherein, The steam generator further comprises a shell (3) made of aluminum alloy, which covers the outer periphery of the heat exchange tube (1).

7. The low noise steam generator of claim 6, wherein, The steam generator further comprises a temperature sensor (5) fixed on the shell (3) and arranged close to the outlet tube (104), and the temperature sensor (5) and the heating tube (2) are respectively electrically connected with a control module of a cooking device.

8. The low noise steam generator of claim 7, wherein, The steam generator further comprises a thermal cutout (4) arranged on one side of the shell (3) and electrically connected with the control module of the cooking device.

9. A cooking apparatus, characterized by, The steam generator with low noise according to any one of claims 1-8 is provided.

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