Hybrid water heating boiler and coffee machine

Abstract

The utility model relates to a mixing type water heating boiler which comprises a boiler body, a heating pipe and a water pipe, the boiler body is provided with a water heating cavity, the heating pipe and the water pipe are arranged in the boiler body and located outside the water heating cavity, and heat generated by the heating pipe is transmitted to the water heating cavity and the water pipe. An inlet of the water pipe is a water source inlet used for being communicated with an external water source, an outlet of the water pipe is communicated with an inlet of the water heating cavity, and an outlet of the water heating cavity forms a hot water outlet or a steam discharge outlet. The heating pipe and the water pipe are arranged outside the heating cavity, inlet water is rapidly preheated through the small size of the water pipe, then the preheated water is introduced into the large-volume heating cavity for main heating, the synergistic effect of secondary heat exchange is achieved, the preheating time of first outlet water is greatly shortened, and the heating rate and the overall energy efficiency are improved. Only additional heating elements are not needed, the overall structure is compact, production, manufacturing and installation cost is reduced, and application and popularization are facilitated.

Description

Technical Field

[0001] This utility model relates to a hybrid water heating boiler and a coffee machine. Background Technology

[0002] Commercial coffee machines use a direct-entry heating chamber for rapid heating of cold water. Due to the large volume of the heating chamber, a single heating cycle can meet the high-temperature, high-pressure extraction requirements of coffee. This design is suitable for commercial models with high flow rates or continuous brewing. However, in home use with low flow rates, using a commercial coffee machine with a boiler heating system results in high water consumption and low efficiency.

[0003] If the coffee machine uses an instant heater, due to the small size and low heat capacity of the instant heater, there will be problems such as large fluctuations in the water temperature and uneven heating, which will affect the taste of the coffee and the user experience. Utility Model Content

[0004] The primary objective of this invention is to provide a hybrid water heating boiler that preheats water before heating it, resulting in high heating efficiency.

[0005] The second objective of this invention is to provide a hybrid water heating boiler that preheats water before heating it, resulting in high heating efficiency.

[0006] The primary objective of this invention is achieved as follows:

[0007] A hybrid water-heating boiler includes a furnace body, a heating element, and a water pipe. The furnace body has a water heating chamber. The heating element and the water pipe are disposed inside the furnace body and located outside the water heating chamber. The heat generated by the heating element is transferred to the water heating chamber and the water pipe.

[0008] The inlet of the water pipe is a water source inlet for connecting to an external water source, the outlet of the water pipe is connected to the inlet of the water heating chamber, and the outlet of the water heating chamber forms a hot water outlet or a steam discharge port.

[0009] By arranging the heating element and water pipe outside the heating chamber, the small volume of the water pipe is used to quickly preheat the incoming water, and then the preheated water is introduced into the large-volume heating chamber for main heating. This achieves the synergistic effect of secondary heat exchange, significantly shortens the initial water preheating time, and improves the heating rate and overall energy efficiency.

[0010] During the preheating stage, due to the limited water volume in the water pipe, the heating element can concentrate the heat to the water in the water pipe in a short time. During the main heating stage, deep heating is completed in the heating chamber.

[0011] The water temperature is raised to an intermediate level during the preheating stage, which significantly shortens the time required for the heating chamber to reach the set temperature. Users can obtain a stable hot water / steam output more quickly after turning on the hot water or steam demand, thus improving the user experience.

[0012] This design uses only one heating element to perform both preheating and main heating functions, eliminating the need for additional heating elements. The overall structure is compact, reducing manufacturing and installation costs and facilitating widespread application.

[0013] This innovative structure meets the needs of high-flow, high-efficiency commercial coffee machines or industrial boilers, while also taking into account the needs of low-flow, stable-output home coffee machines and household water heaters, demonstrating excellent versatility and market potential.

[0014] The primary objective of this utility model can also be achieved by the following technical measures:

[0015] Furthermore, the outlet of the water pipe forms a preheated hot water outlet, the inlet of the water heating chamber forms a preheated hot water inlet, and the preheated hot water outlet and the preheated hot water inlet are connected by a pipe.

[0016] By setting up an independent preheating hot water circuit between the water pipe outlet and the heating chamber inlet, not only is the flow path of preheating and main heating separated, but the water flow in the heating chamber is also more uniform.

[0017] Furthermore, the furnace body has a water heating chamber at its center, and a heat-conducting channel surrounds the water heating chamber. The heating element and water pipe are placed inside the heat-conducting channel, and the conductive end of the heating element, the inlet of the water pipe, and the outlet of the water pipe are exposed outside the heat-conducting channel.

[0018] The heating chamber is placed in the center of the furnace body, and a surrounding heat conduction channel is opened around it, so that the heating tube and water pipe tightly surround the heating chamber, which increases the heat transfer area from the heating tube to the water heating chamber and water pipe, and improves the heat exchange efficiency; at the same time, the heat conduction channel structure helps the furnace body to be heated evenly as a whole, reducing the risk of local overheating.

[0019] Furthermore, the heating element and the water pipe are intertwined, and the heating element is in close contact with the inner wall of the heat conduction channel.

[0020] The heating element and water pipe are intertwined, and the heating element is close to the inner wall of the heat conduction channel, which shortens the heat transfer path from the heating element to the water pipe, making the preheating speed faster and further improving the heating response of convective water with small flow rates.

[0021] Furthermore, the inner wall of the heat conduction channel and the water pipe are respectively in close contact with the heating element.

[0022] The heat conduction channel inner wall and water pipes are arranged in close contact with the heating element, forming multiple points of direct contact. This not only expands the heat transfer contact area but also eliminates heat transfer blind spots, effectively improving the thermal efficiency and temperature uniformity of the entire system.

[0023] Furthermore, a heat-conducting plate is provided between the heat-conducting channel and the water heating chamber.

[0024] By separating the heat conduction channel from the water heating chamber using a heat conduction plate, rapid heat transfer can be ensured while preventing water vapor or impurities in the preheating zone from directly entering the main heating chamber, thus guaranteeing the quality of the hot water.

[0025] Furthermore, the heat-conducting plate is made of stainless steel.

[0026] Using stainless steel plates, which are corrosion-resistant and have excellent thermal conductivity, as the heat transfer plate material not only ensures heat transfer efficiency but also improves the system's durability and anti-scaling ability, extending the boiler's service life.

[0027] Furthermore, the furnace body is a die-cast aluminum furnace body.

[0028] Die-cast aluminum furnace bodies are characterized by light weight, fast heat conduction, and high forming precision. They can accelerate the transfer of heat between the furnace body and the internal flow path, and reduce the overall weight and manufacturing cost, making them easy to promote and apply.

[0029] Furthermore, it also includes a temperature sensor, which is disposed within the heating chamber.

[0030] A temperature sensor is installed inside the heating chamber to monitor the temperature of the main heating chamber in real time, enabling precise temperature control and protection. When the temperature reaches the set value, the power is automatically adjusted or the power is cut off to ensure that the output hot water / steam temperature is stable and safe and reliable.

[0031] The second objective of this utility model is achieved as follows:

[0032] A coffee machine further includes a water tank, a water pump, and a steam valve. The inlet of the water pump is connected to the outlet of the water tank, the outlet of the water pump is connected to the water inlet of the oven body, and the steam outlet of the oven body is connected to the steam inlet of the steam valve.

[0033] The water tank, water pump, and boiler form a closed-loop water supply system. The water tank capacity ensures continuous water supply, and the water pump stably provides the required working pressure.

[0034] The water pump precisely controls the flow rate, and with the preheating + main heating dual-stage heat exchange, it can quickly heat the water to the brewing temperature and extract coffee evenly under high pressure, ensuring that every cup of water has a consistent temperature and stable taste.

[0035] The steam exhaust port inside the furnace is directly connected to the steam valve. The valve can be opened and closed in real time to achieve precise regulation of steam flow and pressure, meeting various operational needs such as milk frothing and cleaning the brewing head.

[0036] The preheating water pipe and the large-capacity heating chamber share the same heating element. When the water pump delivers water, it first passes through the small-volume preheating zone to reduce dry burning and energy waste. When a stable boiling or steam output state is reached, the main heating chamber continuously supplies heat, taking into account both rapid heating and energy saving.

[0037] The beneficial effects of this utility model are as follows:

[0038] This invention employs a dual-stage heating structure that combines water pipe preheating with main heating in the water heating chamber. This preheats the water before it enters the main heating chamber, effectively reducing the time required for main heating and significantly improving overall heating efficiency.

[0039] This invention features a small water volume in the preheating zone that heats up quickly, raising the temperature of the preheated water before it enters the heating chamber for deep heating and rapid vaporization. This achieves an extremely short response time from power-on to stable steam output, meeting the rapid steam production needs of coffee machines.

[0040] This invention provides a heat source for both the preheating zone and the heating chamber simultaneously with the heating tube. It features a compact structure, optimized heat transfer path through the heat conduction channel, minimizes energy loss, improves overall thermal energy utilization, and reduces power consumption.

[0041] This invention features a heating element and water pipe wound together within a heat-conducting channel. Combined with a heat-conducting plate and die-cast aluminum furnace body, it not only saves a significant amount of space but also possesses excellent thermal conductivity and durability, making it widely applicable to various scenarios such as commercial and home coffee machines. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of a hybrid water-heated boiler.

[0043] Figure 2 This is a cross-sectional view of a hybrid water-heated boiler.

[0044] Figure 3 This is an exploded view of a hybrid water-heated boiler.

[0045] Figure 4 This is a diagram of a coffee machine. Detailed Implementation

[0046] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0047] Implementation examples, in conjunction with Figures 1 to 3 As shown, a hybrid water heating boiler includes a furnace body 1, a heating element 2 and a water pipe 3. The furnace body 1 has a water heating chamber 4. The heating element 2 and the water pipe 3 are arranged inside the furnace body 1 and outside the water heating chamber 4. The heat generated by the heating element 2 is transferred to the water heating chamber 4 and the water pipe 3.

[0048] The inlet of the water pipe 3 is a water source inlet 31 for connecting to an external water source, the outlet of the water pipe 3 is connected to the inlet of the water heating chamber 4, and the outlet of the water heating chamber 4 forms a hot water outlet or a steam discharge port 42.

[0049] Furthermore, the outlet of the water pipe 3 forms a preheated hot water outlet 32, and the inlet of the water heating chamber 4 forms a preheated hot water inlet 41. The preheated hot water outlet 32 ​​and the preheated hot water inlet 41 are connected by a pipe.

[0050] Furthermore, the furnace body 1 has a water heating chamber 4 at its center, and a heat conduction channel is formed around the water heating chamber 4 on the furnace body 1. The heating tube 2 and the water pipe 3 are placed inside the heat conduction channel, and the conductive end 21 of the heating tube 2, the inlet of the water pipe 3, and the outlet of the water pipe 3 are exposed outside the heat conduction channel.

[0051] Furthermore, the heating tube 2 and the water pipe 3 are intertwined, and the heating tube 2 is tightly attached to the inner wall of the heat conduction channel.

[0052] Furthermore, the inner wall of the heat conduction channel and the water pipe 3 are respectively in close contact with the heating tube 2.

[0053] Furthermore, a heat-conducting plate 5 is provided between the heat-conducting channel and the water heating chamber 4.

[0054] Furthermore, the heat-conducting plate 5 is a stainless steel plate.

[0055] Furthermore, the furnace body 1 is a die-cast aluminum furnace body.

[0056] Furthermore, it also includes a temperature sensor 6, which is disposed inside the heating chamber.

[0057] Combination Figure 4 As shown, a coffee machine also includes a water tank 7, a water pump 8, and a steam valve 9. The inlet of the water pump 8 is connected to the outlet of the water tank 7, the outlet of the water pump 8 is connected to the water inlet 31 of the furnace body 1, and the steam outlet 42 of the furnace body 1 is connected to the steam inlet of the steam valve 9.

[0058] How coffee machines quickly generate steam:

[0059] When steam is needed, the water pump 8 pressurizes the cold water in the water tank 7 and sends it into the water pipe 3 located outside the boiler. The heating element 2 rapidly preheats the small volume of water flow in the water pipe 3. The preheated water enters the large volume water heating chamber 4 through the pipeline and continues to absorb heat until part of the water vaporizes. The generated steam enters the steam valve 9 through the steam discharge port 42. Since the water temperature has been raised during the preheating stage, the temperature in the heating chamber quickly breaks through the boiling point, which greatly shortens the response time of the system from power-on to outputting high temperature and high pressure steam, thereby achieving the purpose of rapidly generating steam.

Claims

1. A hybrid water-heating boiler, comprising a furnace body, heating elements, and water pipes, wherein the furnace body has a water heating chamber, characterized in that: The heating element and water pipe are installed inside the furnace and located outside the water heating chamber. The heat generated by the heating element is transferred to the water heating chamber and water pipe. The inlet of the water pipe is a water source inlet for connecting to an external water source, the outlet of the water pipe is connected to the inlet of the water heating chamber, and the outlet of the water heating chamber forms a hot water outlet or a steam discharge port.

2. The hybrid water heating boiler according to claim 1, characterized in that: The outlet of the water pipe forms a preheated hot water outlet, and the inlet of the water heating chamber forms a preheated hot water inlet. The preheated hot water outlet and the preheated hot water inlet are connected by a pipe.

3. The hybrid water heating boiler of claim 1, wherein: The furnace body has a water heating chamber at its center, and a heat conduction channel is formed around the water heating chamber. The heating element and water pipe are placed inside the heat conduction channel, and the conductive end of the heating element, the inlet of the water pipe, and the outlet of the water pipe are exposed outside the heat conduction channel.

4. The hybrid water heating boiler of claim 1, wherein: The heating element and the water pipe are intertwined, with the heating element tightly attached to the inner wall of the heat conduction channel.

5. The combination water heating boiler of claim 3 wherein: The inner wall of the heat conduction channel and the water pipe are respectively in close contact with the heating element.

6. The combination water heating boiler of claim 3 wherein: A heat-conducting plate is provided between the heat-conducting channel and the water heating chamber.

7. The hybrid water heating boiler according to claim 6, characterized in that: The heat-conducting plate is made of stainless steel.

8. The hybrid water heating boiler of claim 1, wherein: The furnace body is a die-cast aluminum furnace body.

9. The hybrid water heating boiler of claim 1, wherein: It also includes a temperature sensor, which is disposed inside the heating chamber.

10. A coffee machine employing the hybrid water heating boiler according to any one of claims 1-9, characterized in that: It also includes a water tank, a water pump, and a steam valve. The inlet of the water pump is connected to the outlet of the water tank, the outlet of the water pump is connected to the water source inlet of the furnace body, and the steam exhaust port of the furnace body is connected to the steam inlet of the steam valve.

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