Small boiler and beverage equipment

Abstract

The utility model relates to the technical field of household appliances, and discloses a small-sized boiler and drink equipment, the small-sized boiler comprises a cavity and a heating pipe, the cavity comprises a cylindrical inner wall and a cylindrical outer wall, the cylindrical inner wall is located in the cylindrical outer wall, the heating pipe is located in an annular cylinder clamped by the cylindrical inner wall and the cylindrical outer wall, and the heating pipe is located in the annular cylinder. The top of the cylindrical inner wall is connected with the top of the cylindrical outer wall through a top surface, the bottom of the cylindrical inner wall is connected with the bottom of the cylindrical outer wall through a bottom surface, the top surface is parallel to the bottom surface, and the top surface, the bottom surface, the cylindrical inner wall and the cylindrical outer wall define the cavity. According to the scheme, the cavity forms the annular cylinder through the cylindrical inner wall and the cylindrical outer wall, the spiral heating pipe is arranged in the annular cylinder, the structure is compact, and the size is smaller; the volume of water contained in the cavity is small, meanwhile, the contact area of the water and the heating pipe is large, the heating speed is higher, and instant heating can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a small boiler and beverage equipment. Background Art

[0002] Beverage equipment includes products such as coffee machines and water dispensers. Coffee machines need to heat water during the process of brewing coffee, and use hot water to brew coffee. Therefore, the heating device is an important structural component for coffee machines and other beverage equipment to realize the heating function. How to improve the heating device and further improve the heating efficiency is of great significance.

[0003] Chinese patent CN202311504514.6 discloses a hot beverage preparation device, in particular, a coffee machine, wherein the hot beverage preparation device has a water heater for heating and storing hot water and / or hot steam for preparing hot beverages, the water heater has a cold water inlet, a storage container with a heater, and a hot water and / or steam outlet, wherein it is provided that the storage container is at least partially provided with a vacuum insulation structure or at least partially surrounded by a vacuum insulation structure. However, the water heater in this solution is large in size and has a large amount of stored water, making it difficult to achieve instant heating, and needs to be improved.

[0004] The utility model overcomes the shortcomings of the prior art and provides a small boiler with the advantages of fast heating speed and high energy efficiency level. Utility Model Content

[0005] The main purpose of the utility model is to provide a small boiler for preparing hot water for household appliances, comprising a cavity and a heating tube, wherein the heating tube is arranged inside the cavity and is a spiral structure; the cavity comprises a cylindrical inner wall and a cylindrical outer wall, wherein the cylindrical inner wall is located inside the cylindrical outer wall, the cylindrical inner wall and the cylindrical outer wall are coaxially arranged, the heating tube is located inside an annular cylinder sandwiched by the cylindrical inner wall and the cylindrical outer wall, the tops of the cylindrical inner wall and the cylindrical outer wall are connected by a top surface, the bottoms of the cylindrical inner wall and the cylindrical outer wall are connected by a bottom surface, the top surface is parallel to the bottom surface, and the top surface, the bottom surface, the cylindrical inner wall and the cylindrical outer wall surround the cavity.

[0006] Optionally, the cylindrical inner wall and the inner side of the heating tube form an inner passage, and the cylindrical outer wall and the outer side of the heating tube form an outer passage.

[0007] Optionally, the top surface is provided with a water outlet connected to the interior of the cavity, and the bottom surface is provided with a water inlet connected to the interior of the cavity. The fluid enters the cavity through the water inlet at the bottom, flows through the outer surface of the heating tube, and flows out of the cavity from the water outlet at the top.

[0008] Optionally, the water inlet is provided with a bent pipeline, the outlet direction of the bent pipeline is parallel to the plane where the bottom surface is located, the outlet of the bent pipeline is a tapered port, and the inlet end of the bent pipeline is provided with a groove.

[0009] Optionally, the fluid is ejected through the bent pipeline, the ejected fluid is parallel to the plane where the bottom surface is located, rotates around the annular cylinder of the cavity, rises along the spiral direction of the heating tube, flows through the inner passage and the outer passage, and flows out from the water outlet.

[0010] Optionally, the cavity includes an upper cover and a lower cover, both of which are cylindrical structures with hollow interiors, one end face of the upper cover is open and the other end face is closed, and one end face of the lower cover is open and the other end face is closed;

[0011] The closed end of the upper cover is provided with a cylindrical depression, and the closed end of the lower cover is provided with a cylindrical depression;

[0012] The opening end of the upper cover is arranged opposite to the opening end of the lower cover and is fixedly connected, and the cylindrical concave bottom of the upper cover and the cylindrical concave bottom of the lower cover are closely fitted to each other;

[0013] The upper cover and the lower cover enclose the cavity, the outer side surface of the upper cover and the outer side surface of the lower cover constitute the cylindrical outer wall, and the concave inner wall of the cylinder constitutes the cylindrical inner wall.

[0014] Optionally, the opening end of the lower cover expands outward to form an annular step, the vertical surface inside the annular step fits with the outer side surface of the upper cover, and the top of the opening end of the upper cover fits with the horizontal surface inside the annular step.

[0015] Optionally, both ends of the heating tube pass through the top surface and the bottom surface of the cavity respectively, and both ends of the heating tube are connected to electrodes respectively.

[0016] Optionally, the outer side of the cylindrical outer wall is recessed inwardly to form a bulge inside the cavity.

[0017] The utility model also provides a beverage device, comprising the above-mentioned small boiler.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The small boiler provided by the utility model has a cavity formed into an annular cylinder by a cylindrical inner wall and a cylindrical outer wall, and a spiral heating pipe is arranged inside the annular cylinder, so that the shape of the cavity interior matches the shape of the heating pipe, the structure is compact, and the volume is smaller. In addition, the volume of water contained in the cavity is small, and the contact area between the water and the heating pipe is large, the heating speed is faster, and instant heating can be achieved, no additional space is required to store hot water, heat energy loss is reduced, and more energy-saving is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] One or more embodiments are exemplarily described by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and the figures in the drawings do not constitute proportional limitations unless otherwise stated.

[0021] Figure 1 This is a schematic diagram of an embodiment of a small boiler of the utility model;

[0022] Figure 2 This is a cross-sectional view of a small boiler embodiment of the utility model. Figure 1 ;

[0023] Figure 3 This is a cross-sectional view of a small boiler embodiment of the utility model. Figure 2 ;

[0024] Figure 4 This is a partial cross-section of a small boiler embodiment of the utility model Figure 1 ;

[0025] Figure 5 This is a partial cross-section of a small boiler embodiment of the utility model Figure 2 .

[0026] Reference numerals:

[0027] 1-cavity; 11-cylindrical inner wall; 12-cylindrical outer wall; 121-depression; 13-top surface; 131-water outlet; 14-bottom surface; 15-upper cover; 16-lower cover; 161-annular step; 141-bend pipeline; 2-heating tube; 21-electrode; 3-inner passage; 4-outer passage. DETAILED DESCRIPTION

[0028] In order to facilitate the understanding of the utility model, the utility model is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on another element, or there can be one or more centered elements between them. When an element is described as "connected" to another element, it can be directly connected to another element, or there can be one or more centered elements between them. The terms "vertical", "horizontal", "left", "right", "inside", "outside" and similar expressions used in this specification are only for illustrative purposes. In the description of the utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; "multiple" means two or more. The term "include" and any variation thereof means non-exclusive inclusion, and one or more other features, integers, steps, operations, units, components and / or combinations thereof may be present or added.

[0029] In addition, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection between two components. All technical and scientific terms used in this specification have the same meaning as those generally understood by technicians in the technical field of the present utility model. The terms used in the specification of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0030] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] like Figure 1-5 The figure shows a schematic diagram of an embodiment of a small boiler provided by the utility model.

[0032] Please refer to Figure 1-5 This embodiment is used for preparing hot water in a beverage device, and is particularly suitable for a coffee machine to realize the function of instant heating and brewing, and includes a cavity 1 and a heating tube 2. The heating tube 2 is arranged inside the cavity 1. The heating tube 2 is a spiral structure. The cavity 1 is used to contain water, and the heating tube 2 is used to heat the water. The spiral structure increases the contact area with the water.

[0033] The cavity 1 includes a cylindrical inner wall 11 and a cylindrical outer wall 12. The cylindrical inner wall 11 is located inside the cylindrical outer wall 12. The cylindrical inner wall 11 and the cylindrical outer wall 12 are coaxially arranged. The heating tube 2 is located inside the annular cylinder sandwiched by the cylindrical inner wall 11 and the cylindrical outer wall 12. The tops of the cylindrical inner wall 11 and the cylindrical outer wall 12 are connected by a top surface 13, and the bottoms of the cylindrical inner wall 11 and the cylindrical outer wall 12 are connected by a bottom surface 14. The top surface 13, the bottom surface 14, the cylindrical inner wall 11 and the cylindrical outer wall 12 form a closed cavity 1.

[0034] This embodiment has a compact structure and a small overall size. The installation of the small boiler of this embodiment in household appliances such as beverage equipment can further reduce the volume of the household appliances. Since the volume of the water body is small and the contact area between the water and the heating pipe is large, the heating speed is faster, and instant heating can be achieved. No additional space is required to store hot water, which reduces heat energy loss and is more energy-efficient. The energy efficiency level can reach A++. The top surface 13, the bottom surface 14, the cylindrical inner wall 11 and the cylindrical outer wall 12 that enclose the cavity 1 are made of an alloy material with low thermal conductivity to reduce heat loss.

[0035] In one embodiment, the cylindrical inner wall 11 and the inner side of the heating tube 2 form an inner passage 3, and the cylindrical outer wall 12 and the outer side of the heating tube 2 form an outer passage 4. A gap of a certain width is reserved between the cylindrical inner wall 11 and the inner side of the heating tube 2 to form the inner passage 3 for water circulation so that the water is in full contact with the inner side of the heating tube 2. Correspondingly, a gap of a certain width is reserved between the cylindrical outer wall 12 and the outer side of the heating tube 2 to form the outer passage 4 for water circulation so that the water is in full contact with the outer side of the heating tube 2.

[0036] In one embodiment, the top surface 13 is provided with a water outlet 131 communicating with the interior of the cavity 1, and the bottom surface 14 is provided with a water inlet communicating with the interior of the cavity 1. The fluid enters the interior of the cavity 1 through the water inlet of the bottom 14, flows through the outer surface of the heating tube 2, and flows out of the cavity 1 from the water outlet of the top 13. The top surface 13 in this embodiment is located above the bottom surface 14, that is, the water outlet 131 is located above the water inlet. After the water enters the interior of the cavity 1 through the water inlet, it overcomes gravity under the action of water pressure and is lifted to the water outlet 131 to flow out. This bottom-in and top-out method ensures that the water is in full contact with the heating tube 2.

[0037] Furthermore, a bent pipe 141 is provided at the water inlet, and the outlet direction of the bent pipe 141 is parallel to the plane where the bottom surface 14 is located, and the outlet of the bent pipe 141 is a tapered port, and a groove is provided at the inlet end of the bent pipe 141. The bent pipe 141 is specifically a right-angle bend, and the inlet end is located outside the cavity 1, perpendicular to the bottom surface 14 of the cavity 1, and the groove at the inlet end is used to connect and fix the water inlet pipe. The outlet of the bent pipe 141 is located inside the cavity 1, and the function of the bent pipe 141 is to allow the water to spiral up along the heating tube 2 after entering the cavity 1, thereby increasing the flow time of the water in the cavity 1, and thereby increasing the heat exchange time between the water and the heating tube 2. The outlet of the bent pipe 141 is a tapered port, which has the effect of accelerating the fluid and increasing the tangential force of the surrounding flow of the water.

[0038] Specifically, the fluid (water) is ejected through the bent pipe 141 , the ejected fluid is parallel to the plane where the bottom surface 14 is located, rotates around the annular cylinder of the cavity 1 , rises along the spiral direction of the heating tube 2 , flows through the inner passage 3 and the outer passage 4 , and flows out from the water outlet 131 .

[0039] In one embodiment, the cavity 1 includes an upper cover 15 and a lower cover 16. Both the upper cover 15 and the lower cover 16 are cylindrical structures with hollow interiors. The upper cover 15 has an open end and the other end is closed, while the lower cover 16 has an open end and the other end is closed. The closed end of the upper cover 15 is provided with a cylindrical depression, and the closed end of the lower cover 16 is provided with a cylindrical depression; the open end of the upper cover 15 is arranged opposite to the open end of the lower cover 16 and is fixedly connected, and the bottom of the cylindrical depression of the upper cover 15 and the bottom of the cylindrical depression of the lower cover 16 are tightly fitted with each other. The upper cover 15 and the lower cover 16 surround the cavity 1, and the outer side surface of the upper cover 15 and the outer side surface of the lower cover 16 constitute a cylindrical outer wall 12, and the inner wall of the cylindrical depression constitutes a cylindrical inner wall 11.

[0040] Furthermore, the open end of the lower cover 16 is expanded to form an annular step 161, the vertical surface inside the annular step 161 is in contact with the outer side surface of the upper cover 15, and the top of the open end of the upper cover 15 is in contact with the horizontal surface inside the annular step 161. The annular step 161 plays a positioning role when the upper cover 15 and the lower cover 16 are connected. The cavity 1 adopts a separate design of the upper cover 15 and the lower cover 16, which is convenient for production and assembly, and the two can be connected by welding.

[0041] In one embodiment, the first and second ends of the heating tube 2 pass through the top surface 13 and the bottom surface 14 of the cavity 1, and the first and second ends of the heating tube 2 are respectively connected to the electrodes 21. The heating tube 2 is an electric heating tube, and the electrodes 21 are used to connect the circuit structure. When the electrodes 21 are energized, the heating tube 2 generates heat.

[0042] In one embodiment, the outer surface of the cylindrical outer wall 12 is concave inward to form a depression 121, and a bulge is correspondingly formed inside the cavity 1. The bulge is used to disturb the flowing water inside the cavity 1 to enhance heat exchange.

[0043] The utility model also provides a beverage equipment embodiment, including the above-mentioned small boiler embodiment, the beverage equipment can be a coffee machine, a water dispenser and other beverage preparation equipment, and the small boiler is used to provide hot water. When the beverage equipment is a coffee machine, it also includes a brewer and a grinder. The grinder grinds the coffee beans into powder and transports it to the brewer. The water heated by the small boiler is passed into the brewer to brew the coffee powder.

[0044] The small boiler embodiment of the utility model is used in the coffee machine state to carry out energy consumption test, and the test method is as follows:

[0045] 1. Ambient temperature (T A ) conditions should be 23℃±2℃.

[0046] 2. Small boiler equipment should be kept at ambient temperature for at least 6 hours before measurement.

[0047] 3. The water temperature in the container (T w ) should be 23℃±1℃.

[0048] 4. The coffee quantity should be set as close to 40g and 120g as possible, and the set quantity should be recorded.

[0049] 5. During the waiting period, the device should be refilled with water or emptied of (used) coffee grounds.

[0050] 6. Test voltage: 230Vac / 50Hz.

[0051] 7. Turn on the device and start recording energy consumption for a total of 100 min ± 2 s.

[0052] 8. After the equipment is ready to start brewing, the first brewing cycle is 60s±2s, and the measured temperature (T c1 ) and measurement quality (M c1 );

[0053] 9. After the first brewing cycle is completed, the device will be reactivated and the second brewing cycle will be 60s±2s. Record the measured temperature (T c2 ) and measurement quality (M c2 );

[0054] 10. Then continue the test for 30 minutes;

[0055] 11. Start the third brewing at 30min±2s and record the measured mass of 2×40g coffee (M c3 ). After that, the test will continue without any other actions;

[0056] 12. At 40min±2s, measure and record the cumulative energy consumption (E 40 );

[0057] 13. When the time reaches 100min±2s, measure the cumulative energy consumption and record (E 100 ).

[0058] Calculation of relative energy consumption

[0059] Average weight of brewed coffee (g): M coffee =(M c1 +M c2 +M c3 ) / 3

[0060] The actual temperature of brewing coffee (℃): T act =(T c1 +T c2 ) / 2

[0061] If T act Above 76℃, (T act -T w ) should be set to 53°C. act Below 76°C, the measured value should be T c1 + Tc2 .

[0062] Corrected base energy for coffee segment (Wh):

[0063] B coffee =B brew ×(M coffee / 80)×[(T act -T w ) / (76-23)]+B hu&ready

[0064] Among them, B brew The energy base for brewing, B hu&ready Energy benchmark for heating and standby modes.

[0065] Base value B brew =27.9Wh, B hu&ready =43.5Wh

[0066] Test results:

[0067]

[0068]

[0069]

[0070] In summary, in the small boiler embodiment provided in this embodiment, the cavity is surrounded by a cylindrical inner wall and a cylindrical outer wall to form an annular cylinder, and the spiral heating pipe is arranged inside the annular cylinder, so that the shape of the cavity interior matches the shape of the heating pipe, the structure is compact, and the volume is smaller. In addition, the volume of water contained in the cavity is small, and the contact area between the water and the heating pipe is large, the heating speed is faster, and instant heating can be achieved. No additional space is required to store hot water, which reduces heat energy loss and is more energy-efficient.

[0071] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A small boiler, characterized in that: Used for preparing hot water for household appliances, comprising a cavity and a heating tube, wherein the heating tube is arranged inside the cavity and is a spiral structure; the cavity comprises a cylindrical inner wall and a cylindrical outer wall, wherein the cylindrical inner wall is located inside the cylindrical outer wall, the cylindrical inner wall and the cylindrical outer wall are coaxially arranged, and the heating tube is located inside an annular cylinder sandwiched by the cylindrical inner wall and the cylindrical outer wall, the tops of the cylindrical inner wall and the cylindrical outer wall are connected through a top surface, the bottoms of the cylindrical inner wall and the cylindrical outer wall are connected through a bottom surface, the top surface is parallel to the bottom surface, and the top surface, the bottom surface, the cylindrical inner wall and the cylindrical outer wall surround the cavity.

2. The small boiler according to claim 1, characterized in that: The cylindrical inner wall and the inner side of the heating tube form an inner passage, and the cylindrical outer wall and the outer side of the heating tube form an outer passage.

3. The small boiler according to claim 2, characterized in that: The top surface is provided with a water outlet connected to the interior of the cavity, and the bottom surface is provided with a water inlet connected to the interior of the cavity. The fluid enters the cavity through the water inlet at the bottom, flows through the outer surface of the heating tube, and flows out of the cavity from the water outlet at the top.

4. The small boiler according to claim 3, characterized in that: The water inlet is provided with a bent pipeline, the outlet direction of the bent pipeline is parallel to the plane where the bottom surface is located, the outlet of the bent pipeline is a tapered port, and the inlet end of the bent pipeline is provided with a groove.

5. The small boiler according to claim 4, characterized in that: The fluid is ejected through the bent pipeline, the ejected fluid is parallel to the plane where the bottom surface is located, rotates around the annular cylinder of the cavity, rises along the spiral direction of the heating tube, flows through the inner passage and the outer passage, and flows out from the water outlet.

6. The small boiler according to claim 1, characterized in that: The cavity comprises an upper cover and a lower cover, both of which are cylindrical structures with hollow interiors, one end face of the upper cover is open and the other end face is closed, and one end face of the lower cover is open and the other end face is closed; The closed end of the upper cover is provided with a cylindrical depression, and the closed end of the lower cover is provided with a cylindrical depression; The opening end of the upper cover is arranged opposite to the opening end of the lower cover and is fixedly connected, and the cylindrical concave bottom of the upper cover and the cylindrical concave bottom of the lower cover are closely fitted to each other; The upper cover and the lower cover enclose the cavity, the outer side surface of the upper cover and the outer side surface of the lower cover constitute the cylindrical outer wall, and the concave inner wall of the cylinder constitutes the cylindrical inner wall.

7. The small boiler according to claim 6, characterized in that: The opening end of the lower cover expands outward to form an annular step, the vertical surface inside the annular step fits with the outer side surface of the upper cover, and the top of the opening end of the upper cover fits with the horizontal surface inside the annular step.

8. The small boiler according to claim 1, characterized in that: The head and tail ends of the heating tube pass through the top surface and the bottom surface of the cavity respectively, and the head and tail ends of the heating tube are connected to electrodes respectively.

9. The small boiler according to claim 1, characterized in that: The outer side of the cylindrical outer wall is recessed inwards to form a bulge inside the cavity.

10. A beverage device, characterized in that: It comprises a small boiler as described in any one of claims 1 to 9.

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