A boiler and a coffee machine using the same

Abstract

The utility model discloses a boiler, its characterized in that: including furnace body (1), heating tube (2), cold water pipe (3), its inlet end is connected with the cold water inlet joint (121), hot water pipe (4), its inlet end is located furnace body (1) inner chamber liquid level below, and its outlet end is connected with the hot water outlet joint (122), steam pipe (5), its inlet end is located furnace body (1) inner chamber liquid level above, and its outlet end is connected with the steam outlet joint (123), and preheating water pipe (6) are located furnace body (1) inner chamber liquid level below, and its inlet end is connected with the preheating water inlet joint (124), and its outlet end is connected with the preheating water outlet joint (125). The utility model discloses still a kind of coffee machine with the boiler of application has. Compared with prior art, the boiler of the utility model is simple structure and low in cost.

Description

Technical Field

[0001] This utility model relates to the field of beverage brewing equipment technology, specifically to a boiler and a coffee machine using the boiler. Background Technology

[0002] Current coffee machines typically use a boiler to provide steam and hot water.

[0003] For example, Chinese patent application CN201420869171.3, entitled "Steam and Hot Water Supply Device," discloses a steam and hot water supply device, including a heating assembly. A heater, a preheating water pipe, a steam water pipe, and a hot water pipe are sequentially and spaced apart around a steam boiler, and the steam boiler, heater, and each water pipe are coated with a heat-conducting layer. A preheating water tank stores external water, and a circulating pump draws water from the tank and delivers it to the preheating water pipe. After indirect heating by the heating assembly, the water is returned to the preheating water tank for storage. A boiling pump draws preheated hot water from the preheating water tank and delivers it to the steam water pipe and hot water pipe, respectively, for indirect heating by the heating assembly. The steam water pipe delivers hot water to the steam boiler, where the heating assembly further indirectly heats it into steam. The steam is controlled by a steam output device and output to the outside for use. The hot water in the hot water pipe is controlled by a hot water output device and output to the outside for use.

[0004] However, the above solution has several drawbacks. First, by casting a heat conduction coating layer to cover the boiler, heater, and water pipes, the structure is complex and costly. Second, joints are installed at both ends and around the boiler, making production and processing difficult. Utility Model Content

[0005] The first technical problem to be solved by this utility model is to provide a boiler with a simple structure and low cost, in light of the current state of the technology.

[0006] The second technical problem to be solved by this utility model is to provide a boiler that is convenient to manufacture and process.

[0007] The third technical problem to be solved by this utility model is to provide a coffee machine that uses the above-mentioned boiler.

[0008] The technical solution adopted by this utility model to solve the first technical problem mentioned above is: a boiler, characterized in that it includes:

[0009] The furnace body is equipped with a cold water inlet connector, a hot water outlet connector, a steam outlet connector, a preheated water inlet connector, and a preheated water outlet connector on the outside.

[0010] The heating element is located inside the furnace body;

[0011] A cold water pipe is installed inside the furnace body, and its inlet end is connected to the cold water inlet connector.

[0012] A hot water pipe is installed inside the furnace body, with its inlet end located below the liquid level in the inner cavity of the furnace body, and its outlet end connected to the hot water outlet connector.

[0013] A steam pipe is installed inside the furnace body, with its inlet end located above the liquid level in the furnace body cavity, and its outlet end connected to the steam outlet connector; and

[0014] A preheating water pipe is installed inside the furnace body and located below the liquid level in the furnace body cavity. Its inlet end is connected to the preheating water inlet connector, and its outlet end is connected to the preheating water outlet connector.

[0015] In order to extend the heat exchange path of the liquid in the preheating water pipe as much as possible, the preheating water pipe has at least a partial spiral section, which spirals around the outer periphery of the heating tube.

[0016] To improve heat exchange efficiency, there are two inlet and two outlet preheating water connectors, and two preheating water pipes, which correspond to the inlet and outlet preheating water connectors. The spiral sections of the two preheating water pipes are arranged side by side and staggered.

[0017] To ensure a stable supply of cold water, the outlet end of the cold water pipe is located at the bottom of the furnace body cavity.

[0018] To further address the second technical problem mentioned above, the furnace body includes a furnace body with an opening at the bottom and a furnace cover covering the opening at the bottom of the furnace body. The cold water inlet connector, hot water outlet connector, steam outlet connector, preheated water inlet connector, and preheated water outlet connector are all located on the furnace cover.

[0019] To facilitate the installation of the heating element, the heating element is inverted U-shape, with both ends connected to the furnace cover.

[0020] To facilitate control of the liquid level inside the furnace, a liquid level sensor is also included inside the furnace. The fixed end of the liquid level sensor is connected to the furnace cover, and the sensing end of the liquid level sensor is located above the inlet end of the hot water pipe and below the inlet end of the steam pipe.

[0021] To facilitate control of the hot water temperature and prevent dry burning, the furnace also includes two NTC sensors installed inside the furnace body. The fixed ends of both NTC sensors are connected to the furnace cover. The sensing end of one of the NTC sensors is thermally connected to the heating element, while the sensing end of the other NTC sensor is located below the liquid level in the inner cavity of the furnace body.

[0022] To prevent damage from overpressure, the furnace cover is equipped with a pressure relief valve.

[0023] The technical solution adopted by this utility model to solve the third technical problem mentioned above is: a coffee machine, characterized in that: it uses the above-mentioned boiler.

[0024] Compared with the prior art, the advantages of this utility model are:

[0025] (1) By setting the inlet end of the hot water pipe below the liquid surface in the furnace cavity, setting the inlet end of the steam pipe above the liquid surface in the furnace cavity, and setting the entire preheating hot water pipe below the liquid surface in the furnace cavity, hot water and steam can be supplied on the one hand, and preheating of water for coffee extraction can be achieved on the other hand. The structure is simple and the cost is low.

[0026] (2) By setting the cold water inlet connector, hot water outlet connector, steam outlet connector, preheated water inlet connector and preheated water outlet connector on the furnace cover, the boiler production process can be simplified and its production and processing can be facilitated. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the boiler in an embodiment of the coffee machine of this utility model;

[0028] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure from another direction;

[0029] Figure 3 for Figure 1 A longitudinal sectional view;

[0030] Figure 4 for Figure 1 A schematic diagram of the three-dimensional structure after omitting the pot body;

[0031] Figure 5 for Figure 4 A three-dimensional structural diagram omitting the preheating water pipe. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0033] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0034] like Figures 1 to 5 The image shows a preferred embodiment of the coffee machine with a boiler according to this utility model. The boiler includes a boiler body 1, a heating element 2, a cold water pipe 3, a hot water pipe 4, a preheated hot water pipe 6, a liquid level sensor 7, an NTC sensor 8, and a pressure relief valve 9.

[0035] The furnace body 1 includes a furnace body 11 with an opening at the bottom and a furnace cover 12 covering the opening at the bottom of the furnace body 11. Specifically, the furnace body 11 is cylindrical; the bottom of the furnace cover 12 is provided with a cold water inlet connector 121, a hot water outlet connector 122, a steam outlet connector 123, two preheated water inlet connectors 124 and two preheated water outlet connectors 125.

[0036] Heating element 2 is located inside furnace body 1 and is used to heat the liquid inside furnace body 1. In this embodiment, heating element 2 is inverted U-shape, and both ends of heating element 2 are connected to furnace cover 12.

[0037] The cold water pipe 3 is located inside the furnace body 1 and is used to supply cold water to the furnace body 1. In this embodiment, the cold water pipe 3 is inverted U-shape, with its inlet end connected to the cold water inlet connector 121 and its outlet end located at the bottom of the inner cavity of the furnace body 1.

[0038] Hot water pipe 4 is installed inside the furnace body 1 to discharge hot water from the furnace body 1. In this embodiment, hot water pipe 4 is arranged vertically, with its inlet end (top) located below the liquid level inside the furnace body 1, and its outlet end (bottom) connected to hot water outlet connector 122.

[0039] Steam pipe 5 is located inside furnace body 1 and is used to discharge steam from furnace body 1. In this embodiment, steam pipe 5 is arranged vertically, with its inlet end (top) located above the liquid surface inside the furnace body 1 and its outlet end (bottom) connected to steam outlet connector 123.

[0040] The preheating water pipe 6 is located inside the furnace body 1 and below the liquid level in the inner cavity of the furnace body 1, and is used to preheat the liquid inside the furnace body 1 using the hot water inside the furnace body 1. In this embodiment, there are two preheating water pipes 6, which correspond one-to-one with the preheating water inlet connector 124 and the preheating water outlet connector 125. The inlet end of each preheating water pipe 6 is connected to the corresponding preheating water inlet connector 124, and the outlet end of each preheating water pipe 6 is connected to the corresponding preheating water outlet connector 125. The preheating water pipe 6 has a partial spiral section 61, which spirals around the outer periphery of the heating tube 2. The spiral sections 61 of the two preheating water pipes 6 are arranged side by side and staggered.

[0041] A liquid level sensor 7 is installed inside the furnace body 1 to monitor whether the liquid level inside the furnace body 1 has reached a set value. In this embodiment, the liquid level sensor 7 is arranged vertically, with its fixed end (bottom end) connected to the furnace cover 12, and its sensing end (top end) located above the inlet end of the hot water pipe 4 and below the inlet end of the steam pipe 5.

[0042] The NTC sensor 8 is located inside the furnace body 1. In this embodiment, there are two NTC sensors 8, both of which are arranged vertically. Their fixed ends, i.e., their bottom ends, are connected to the furnace cover 12. The sensing end, i.e., the top end, of one NTC sensor 8 is thermally connected to the heating element 2 to monitor the temperature of the heating element 2, thereby preventing dry burning. The sensing end, i.e., the top end, of the other NTC sensor 8 is located below the liquid surface inside the furnace body 1 to monitor the temperature of the hot water inside the furnace body 1, and works with the heating element 2 to achieve temperature control.

[0043] The pressure relief valve 9 is located on the furnace cover 12.

[0044] The working principle of this embodiment is as follows: During operation, cold water is first supplied to the furnace body 1 through the cold water pipe 3 to reach the set liquid level. Then, the heating element 2 is activated, and the cold water is heated into hot water by the heating element 2, generating steam above the liquid surface. The hot water is discharged through the hot water pipe 4 and supplied to the hot water outlet of the coffee machine, and the steam is discharged through the steam pipe 5 and supplied to the steam outlet of the coffee machine. At the same time, the liquid in the preheating hot water pipe 6 exchanges heat with the liquid in the furnace body 1 to achieve the preheating effect. The preheated water in the preheating hot water pipe 6 is supplied to the rear heater for further heating before participating in coffee extraction. In this way, the energy required by the rear heater is greatly reduced, thereby achieving the effect of energy saving.

Claims

1. A boiler, characterized in that: Including The furnace body (1) is provided with a cold water inlet connector (121), a hot water outlet connector (122), a steam outlet connector (123), a preheated water inlet connector (124), and a preheated water outlet connector (125) on the outside; Heating element (2) is located inside the furnace body (1); A cold water pipe (3) is installed inside the furnace body (1), and its inlet end is connected to the cold water inlet connector (121). Hot water pipe (4) is located inside the furnace body (1), with its inlet end located below the liquid level inside the furnace body (1) and its outlet end connected to the hot water outlet connector (122). A steam pipe (5) is installed inside the furnace body (1), with its inlet end located above the liquid level inside the furnace body (1) and its outlet end connected to the steam outlet connector (123); and The preheating water pipe (6) is located inside the furnace body (1) and below the liquid level in the inner cavity of the furnace body (1). Its inlet end is connected to the preheating water inlet connector (124), and its outlet end is connected to the preheating water outlet connector (125).

2. The boiler according to claim 1, characterized in that: The preheating pipe (6) has at least a partial spiral section (61) which spirals around the outer periphery of the heating pipe (2).

3. The boiler according to claim 2, characterized in that: There are two preheating water inlet connectors (124) and two preheating water outlet connectors (125). There are two preheating water pipes (6), which correspond to the preheating water inlet connectors (124) and the preheating water outlet connectors (125). The spiral sections (61) of the two preheating water pipes (6) are arranged side by side and staggered.

4. The boiler according to claim 1, characterized in that: The outlet end of the cold water pipe (3) is located at the bottom of the inner cavity of the furnace body (1).

5. The boiler according to any one of claims 1 to 4, characterized in that: The furnace body (1) includes a furnace body (11) with an opening at the bottom end and a furnace cover (12) covering the opening at the bottom end of the furnace body (11). The cold water inlet connector (121), hot water outlet connector (122), steam outlet connector (123), preheated hot water inlet connector (124), and preheated hot water outlet connector (125) are all located on the furnace cover (12).

6. The boiler according to claim 5, characterized in that: The heating tube (2) is in the shape of an inverted U, and both ends of the heating tube (2) are connected to the furnace cover (12).

7. The boiler according to claim 5, characterized in that: It also includes a liquid level sensor (7) disposed in the furnace body (1), the fixed end of which is connected to the furnace cover (12), and the sensing end of the liquid level sensor (7) is located above the inlet end of the hot water pipe (4) and below the inlet end of the steam pipe (5).

8. The boiler according to claim 5, characterized in that: It also includes two NTC sensors (8) located inside the furnace body (1). The fixed ends of the two NTC sensors (8) are connected to the furnace cover (12). The sensing end of one of the NTC sensors (8) is thermally connected to the heating tube (2), and the sensing end of the other NTC sensor (8) is located below the liquid level inside the furnace body (1).

9. The boiler according to claim 5, characterized in that: The furnace cover (12) is equipped with a pressure relief valve (9).

10. A coffee machine, characterized in that: The application has the boiler described in any one of claims 1 to 9.

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