Double-tube heater and coffee machine

Abstract

The utility model relates to the technical field of coffee machine household appliances, and discloses a double-tube heater and a coffee machine, the heater comprises a mounting shell and heating units arranged in the mounting shell, the head end and the tail end of each heating unit are respectively provided with an inlet and an outlet, and the heating units comprise a first heating unit and a second heating unit. The first heating unit and the second heating unit are arranged in parallel; the heating temperature of the first heating unit is higher than that of the second heating unit, the medium of an inlet of the first heating unit is water, the medium of an outlet is steam, and the medium of an inlet of the second heating unit is water, and the medium of an outlet is water. According to the scheme, at least two heating units which are arranged in parallel are adopted, the two heating units conduct heating independently, control is easy, and hot water and steam supply can be achieved at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of coffee machine household appliances, in particular to a double-tube heater and a coffee machine. Background Art

[0002] A coffee machine is a household appliance that can complete the entire process of grinding, filling, brewing, extracting, and removing residues. With the development of coffee machine technology and consumer demand, fully automatic coffee machines with milk frothing functions have come into being. Fully automatic coffee machines use milk frothers to mix air, steam, and milk in a mixing chamber in a certain proportion through their respective pipes to form milk froth, which is then mixed with coffee to make coffee of different flavors. However, there is a difference between the liquid temperature for brewing coffee powder and the steam temperature required for milk froth, and a liquid heating system cannot meet the needs of coffee brewing and steam frothing. How to achieve two-temperature heating supply is of great significance.

[0003] Chinese patent CN202321981485.8 discloses a beverage machine, including: a water supply source; an outlet assembly for outputting fluid; a first boiler connected between the water supply source and the outlet assembly for outputting steam; and also including a cold water delivery pipeline, the cold water delivery pipeline is connected to the output end of the water supply source, the steam outlet of the first boiler is connected to the steam delivery pipeline, the cold water delivery pipeline and the steam delivery pipeline have an output connection point, a first multi-way valve is arranged between the steam delivery pipeline and the outlet assembly, the first multi-way valve includes a fluid inlet and a fluid outlet, the output connection point is connected to the upstream of the fluid inlet or the downstream of the fluid outlet, and the fluid outlet is connected to the outlet assembly. By delivering hot water mixed with steam and cold water to the outlet assembly. However, the technical point of this scheme is to mix steam and cold water to obtain hot water, which has high requirements for the water supply line and complex water circuit control.

[0004] The utility model overcomes the shortcomings of the prior art and provides a double-tube heater which can simultaneously provide hot water for brewing coffee and steam for making milk foam. Utility Model Content

[0005] The main purpose of the utility model is to provide a double-tube heater, comprising a mounting shell, a heating unit arranged inside the mounting shell, the heating unit having an inlet and an outlet at both ends thereof, the heating unit comprising a first heating unit and a second heating unit, the first heating unit and the second heating unit being arranged in parallel;

[0006] The heating temperature of the first heating unit is greater than that of the second heating unit. The medium at the inlet of the first heating unit is water and the medium at the outlet is water vapor. The medium at the inlet of the second heating unit is water and the medium at the outlet is water.

[0007] Optionally, the heating unit includes a heating core, a pipeline and a heat conductor, wherein electrodes are respectively provided at both ends of the heating core, the pipeline surrounds the circumference of the heating core, the pipeline connects the inlet and the outlet, and the heat conductor wraps the heating core and the pipeline.

[0008] Optionally, the heat conductor is provided with a temperature sensor, which is inserted into the heat conductor and in contact with the pipeline, and is used to detect the temperature of the medium in the pipeline.

[0009] Optionally, the heating temperature range of the first heating unit is at least the boiling point of the heating medium, and the heating temperature range of the second heating unit is 80-90 degrees Celsius.

[0010] Optionally, a grounding clip is included, and the grounding clip is connected to the heating unit for connecting a grounding circuit.

[0011] Optionally, the mounting shell includes a mounting seat, an upper cover and a lower cover, the mounting seat is provided with two mounting through holes, the shape of the mounting through holes matches the shape of the heating unit, the two mounting through holes are respectively used to mount the first heating unit and the second heating unit, and the number of the mounting seats is two, which are respectively provided at both ends of the heating unit;

[0012] The upper cover and the lower cover match each other, and the upper cover and the lower cover form a cavity for accommodating the heating unit. The upper cover and the lower cover are fixedly connected to the heating unit, and the lower cover is provided with a through hole for the inlet and the outlet to pass through.

[0013] Optionally, the upper cover and the lower cover are made of heat-insulating materials, the upper cover is provided with a pressure detection port and a socket, the pressure detection port is used for high-pressure testing, the socket matches the shape of the pressure detection port and is detachably connected to the pressure detection port.

[0014] Optionally, a mixer is included, which is connected to the outlet of the first heating unit and the milk input port and is used to mix steam and milk to form milk foam.

[0015] Optionally, the mixer includes a base, a mixing chamber, a steam port, a liquid port and a mixing port;

[0016] The mixing chamber is arranged inside the base, the steam port and the liquid port are arranged at the rear end of the base, the steam port and the liquid port are respectively communicated with the mixing chamber, a check valve is arranged between the liquid port and the mixing chamber, and the mixing port is arranged at the front end of the base and communicated with the mixing chamber;

[0017] The steam port is connected to the outlet of the first heating unit, the liquid port is connected to the milk input port, and the mixing port is used to connect to the milk foam outlet;

[0018] The top of the mixing chamber is connected to a branch, the end of the branch passes through the top of the base, and a blocking cover is provided at the end of the branch.

[0019] The utility model also provides a coffee machine, comprising the above-mentioned double-tube heater.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] The double-tube heater provided by the utility model adopts at least two parallel heating units, one of which heats water and outputs hot water, and the output hot water is used to brew coffee, and the other heating unit heats water into water vapor and outputs water vapor, and the output water vapor is used to mix with milk to achieve milk frothing. The two heating units are heated independently, and the control is simple, and hot water and steam can be supplied at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 This is a schematic diagram of an embodiment of the double-tube heater of the utility model. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of an embodiment of the double-tube heater of the utility model. Figure 2 ;

[0025] Figure 3 This is a cross-sectional view of the heating unit of the double-tube heater embodiment of the utility model

[0026] Figure 4 This is an exploded view of an embodiment of a double-tube heater of the utility model;

[0027] Figure 5 This is a schematic diagram of a mixer of a double-tube heater embodiment of the utility model;

[0028] Figure 6 This is an exploded diagram of a mixer of a double-tube heater embodiment of the utility model;

[0029] Figure 7 This is a schematic diagram of an embodiment of a coffee machine of the utility model;

[0030] Figure 8 This is a cross-sectional view of an embodiment of a coffee machine of the present utility model.

[0031] Reference numerals:

[0032] 1- double-tube heater; 11- mounting shell; 111- mounting base; 112- upper cover; 1121- pressure detection port; 1122- socket; 113- lower cover; 12- heating unit; 12a- first heating unit; 12b- second heating unit; 121- inlet; 122- outlet; 123- heating core; 1231- electrode; 124- pipeline; 125- heat conductor; 126- temperature sensor; 127- grounding clip; 13- mixer; 131- base; 132- mixing chamber; 133- steam port; 134- liquid port; 135- mixing port; 136- check valve; 137- baffle; 2- brewer; 3- feeding assembly; 4- coffee grounds chamber; 5- water storage tank; 6- milk chamber; 7- liquid outlet tap. DETAILED DESCRIPTION

[0033] 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.

[0034] 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.

[0035] 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.

[0036] like Figure 1-6 , which is a schematic diagram of an embodiment of a double-tube heater provided by the utility model.

[0037] Please refer to Figure 1-6 This embodiment is used for heating liquid in a coffee machine to supply hot water and steam, and specifically includes a mounting shell 11 and a heating unit 12, wherein the heating unit 12 is arranged inside the mounting shell 11. The heating unit 12 is provided with an inlet 121 and an outlet 122 at both ends, respectively, and the heating unit 12 includes a first heating unit 12a and a second heating unit 12b, which are arranged in parallel and aligned at both ends.

[0038] The heating temperature of the first heating unit 12a is greater than the heating temperature of the second heating unit 12b. The inlet medium of the first heating unit 12a is water, and the outlet medium is water vapor. The inlet medium of the second heating unit 12b is water, and the outlet medium is water. The outlet water temperature of the second heating unit 12b is greater than the inlet water temperature.

[0039] The first heating unit 12a provides water vapor and milk to mix to obtain milk foam. Normal temperature water enters the first heating unit 12a from the inlet, is heated to the boiling point of water (100 degrees Celsius under normal 1 atmosphere pressure) by the heating component of the first heating unit 12a, and forms water vapor. The water vapor is output from the inside through the outlet of the first heating unit 12a and supplied to the mixing component to mix with the milk to form milk foam.

[0040] The second heating unit 12b provides heated water for brewing coffee. Normal temperature water enters the second heating unit 12b from the inlet, and is heated to a certain temperature by the heating component in the second heating unit 12b to obtain high temperature water, which is lower than the boiling point of water. The high temperature water is output from the inside through the outlet of the second heating unit 12b and supplied to the brewing core to brew coffee powder.

[0041] In one embodiment, the heating unit 12 includes a heating core 123, a pipeline 124 and a heat conductor 125. Electrodes 1231 are provided at both ends of the heating core 123, the pipeline 124 surrounds the circumference of the heating core 123, the pipeline 124 connects the inlet 121 and the outlet 122, and the heat conductor 125 wraps the heating core 123 and the pipeline 124.

[0042] The heating core 123 is specifically a cylindrical heating tube. The electrodes 1231 at both ends are connected to the circuit and the heating core 123 generates heat when the power is turned on. The pipeline 124 spirally surrounds the circumference of the heating core 123. The heat conductor 125 is made of a material with good thermal conductivity, specifically a metal alloy. The heat conductor 125 wraps the pipeline 124 and the heating core 123, and is used to evenly conduct the heat generated by the heating core 123 to the liquid flowing in the pipeline 124. The inlet 121 and the outlet 122 connected to the pipeline 124 are exposed outside the heat conductor 125, and the electrodes 1231 at both ends of the heating core 123 are exposed outside the heat conductor 125. The heat conductor 125 is specifically a cylindrical structure, and the outer surface can be coated with a heat insulating material for heat insulation.

[0043] In one embodiment, the heat conductor 125 is provided with a temperature sensor 126 . The temperature sensor 126 is inserted into the heat conductor 125 and contacts the pipeline 124 , so as to detect the temperature of the medium in the pipeline.

[0044] Specifically, each heating unit 12 is provided with two temperature sensors 126, which are symmetrically arranged on both sides of the center of the heating unit 12, and are used to detect the temperature near the inlet 121 and the outlet 122. The lead end of the temperature sensor 126 extends out of the heat conductor 125 to connect to the external circuit. The temperature of the medium in the pipeline 124 is monitored by the temperature sensor 126, and the heating power of the heating core 123 is adjusted in time.

[0045] In one embodiment, the heating temperature range of the first heating unit 12a is at least the boiling point temperature of the heating medium, that is, the boiling point temperature of water, and the boiling point temperature of water under conventional atmospheric pressure is 100 degrees Celsius. There may be pressure regulation during the actual liquid circulation process. The heating temperature range of the second heating unit is 80-90 degrees Celsius. The heating range referred to here can be the temperature range change during the heating process, and can also be the temperature range of the medium output from the outlet 122 of the heating unit 12.

[0046] In one embodiment, a grounding clip 127 is included, and the grounding clip 127 is connected to the heating unit 12 for connecting a grounding circuit to achieve grounding of the heating unit 12 .

[0047] In one embodiment, the mounting housing 11 includes a mounting seat 111, an upper cover 112 and a lower cover 113. The mounting seat 111 is provided with two mounting through holes, the shape of which matches the shape of the heating unit 12, and the two mounting through holes are respectively used to mount the first heating unit 12a and the second heating unit 12b, and the number of mounting seats 111 is two, which are respectively arranged at both ends of the heating unit 12. The mounting seat 111 is used to align the two heating units 12 head to tail so that the two heating units 12 are arranged in parallel.

[0048] The upper cover 112 and the lower cover 113 match each other, and the upper cover 112 and the lower cover 113 form a cavity for accommodating the heating unit 12. The upper cover 112 and the lower cover 113 are fixedly connected to the heating unit 12, and the lower cover 113 is provided with through holes for the inlet 121 and the outlet 122 to pass through. In addition, there are through holes for various line leads to pass through, such as the temperature sensor 126, the grounding clamp 127, and the electrode of the heating unit 12.

[0049] Furthermore, the upper cover 112 and the lower cover 113 are made of heat-insulating materials, which are used to insulate the internal heating unit 12 from the outside, so as to prevent the heating of the internal heating unit 12 from affecting the operation of other components of the coffee machine.

[0050] The upper cover 112 is provided with a pressure detection port 1121 and a socket 1122. The pressure detection port 1121 is used for high pressure testing. The socket 1122 matches the shape of the pressure detection port 1121 and is detachably connected to the pressure detection port 1121. The pressure detection port 1121 is provided to facilitate the detection of whether the product is pressure qualified after production. The pressure detection device detects the internal pressure through the pressure detection port 1121. After the detection is completed, the socket 1122 is installed to block the pressure detection port 1121.

[0051] In one embodiment, a mixer 13 is included, and the mixer 13 is connected to the outlet 122 of the first heating unit 12a and the milk input port, and is used to mix steam and milk to form milk foam.

[0052] Specifically, the mixer 13 includes a base 131, a mixing chamber 132, a steam port 133, a liquid port 134 and a mixing port 135. The mixing chamber 132 is arranged inside the base 131, and the steam port 133 and the liquid port 134 are arranged at the rear end of the base 131. The steam port 133 and the liquid port 134 are respectively communicated with the mixing chamber 132, a check valve 136 is arranged between the liquid port 134 and the mixing chamber 132, and the mixing port 135 is arranged at the front end of the base 131 and communicated with the mixing chamber 132. The top of the mixing chamber 132 is connected to a branch, the end of the branch passes through the top of the base 131, and a blocking cover 137 is arranged at the end of the branch.

[0053] The steam port 133 is connected to the outlet of the first heating unit 12a to input water vapor into the mixing chamber 132. The liquid port 134 is connected to the milk input port to input milk into the mixing chamber 132. The mixing port 135 is used to connect to the milk froth outlet. After the water vapor and milk are mixed in the mixing chamber 132, they are output to the milk froth outlet through the mixing port 135.

[0054] like Figure 7-8 As shown, the utility model also provides an embodiment of a coffee machine.

[0055] Please refer to Figure 7-8The coffee machine embodiment includes the above-mentioned double-tube heater 1, and also includes a brewer 2, a material feeding component 3, a coffee grounds chamber 4, a water storage chamber 5, a milk chamber 6 and a liquid outlet tap 7.

[0056] The feed assembly 3 is connected to the brewer 2 and is used to add coffee beans and grind the coffee beans into powder, and the coffee powder falls into the brewer 2. The brewer 2 is also connected to the double-tube heater 1, the liquid outlet tap 7 and the coffee grounds chamber 4 respectively. The brewer 2 compresses and extracts the coffee powder. The double-tube heater 1 delivers hot water into the brewer 2 to obtain coffee liquid from the compressed coffee powder. The coffee liquid is output through the coffee liquid outlet in the liquid outlet tap 7, and the brewed coffee powder falls into the coffee grounds chamber 4 below.

[0057] The water storage chamber 5 is used to store water, which is input into the double-tube heater 1 for heating through a pump. The heated hot water and water vapor are output through the double-tube heater 1. The hot water is passed into the brewer 2, and the water vapor passes through the mixer 13. The mixer 13 is also connected to the milk chamber 6. The milk and water vapor are mixed to form milk foam, which is output through the milk foam outlet of the liquid outlet faucet 7.

[0058] In summary, the double-tube heater provided in this embodiment uses at least two parallel heating units, one of which heats water and outputs hot water, and the output hot water is used to brew coffee, and the other heating unit heats water into water vapor and outputs water vapor, and the output water vapor is used to mix with milk to achieve milk frothing. The two heating units are heated independently, and the control is simple, and hot water and steam can be supplied at the same time.

[0059] 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 double-tube heater, characterized in that: It includes a mounting shell, a heating unit arranged inside the mounting shell, the heating unit is provided with an inlet and an outlet at both ends, the heating unit includes a first heating unit and a second heating unit, and the first heating unit and the second heating unit are arranged in parallel; The heating temperature of the first heating unit is greater than that of the second heating unit. The medium at the inlet of the first heating unit is water and the medium at the outlet is water vapor. The medium at the inlet of the second heating unit is water and the medium at the outlet is water.

2. The double-tube heater according to claim 1, characterized in that: The heating unit includes a heating core, a pipeline and a heat conductor, wherein electrodes are respectively provided at both ends of the heating core, the pipeline surrounds the circumference of the heating core, the pipeline connects the inlet and the outlet, and the heat conductor wraps the heating core and the pipeline.

3. The double-tube heater according to claim 2, characterized in that: The heat conductor is provided with a temperature sensor, which is inserted into the heat conductor and contacts the pipeline, and is used to detect the temperature of the medium in the pipeline.

4. The double-tube heater according to claim 1, characterized in that: The heating temperature range of the first heating unit is at least the boiling point temperature of the heating medium, and the heating temperature range of the second heating unit is 80-90 degrees Celsius.

5. The double-tube heater according to claim 1, characterized in that: A grounding clip is included, and the grounding clip is connected to the heating unit and is used to connect a grounding circuit.

6. The double-tube heater according to claim 1, characterized in that: The mounting shell comprises a mounting seat, an upper cover and a lower cover, the mounting seat is provided with two mounting through holes, the shape of the mounting through holes matches the shape of the heating unit, the two mounting through holes are respectively used to mount the first heating unit and the second heating unit, and the number of the mounting seats is two, which are respectively arranged at both ends of the heating unit; The upper cover and the lower cover match each other, and the upper cover and the lower cover form a cavity for accommodating the heating unit. The upper cover and the lower cover are fixedly connected to the heating unit, and the lower cover is provided with a through hole for the inlet and the outlet to pass through.

7. The double-tube heater according to claim 6, characterized in that: The upper cover and the lower cover are made of heat-insulating materials. The upper cover is provided with a pressure detection port and a socket. The pressure detection port is used for high-voltage testing. The socket matches the shape of the pressure detection port and is detachably connected to the pressure detection port.

8. The double-tube heater according to claim 1, characterized in that: A mixer is included, which is connected to the outlet of the first heating unit and the milk input port and is used for mixing steam and milk to form milk foam.

9. The double-tube heater according to claim 8, characterized in that: The mixer comprises a base, a mixing chamber, a steam port, a liquid port and a mixing port; The mixing chamber is arranged inside the base, the steam port and the liquid port are arranged at the rear end of the base, the steam port and the liquid port are respectively communicated with the mixing chamber, a check valve is arranged between the liquid port and the mixing chamber, and the mixing port is arranged at the front end of the base and communicated with the mixing chamber; The steam port is connected to the outlet of the first heating unit, the liquid port is connected to the milk input port, and the mixing port is used to connect to the milk foam outlet; The top of the mixing chamber is connected to a branch, the end of the branch passes through the top of the base, and a blocking cover is provided at the end of the branch.

10. A coffee machine, characterized in that: Comprising a double-tube heater as described in any one of claims 1-9.

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