Coffee making system

Abstract

This application relates to the technical field of coffee machines, and in particular to a coffee making system, including: a mother and son boiler, an extraction heating boiler, and a steam heating boiler; wherein, the mother and son boiler includes a mother boiler and a son boiler arranged in the mother boiler; the mother boiler is communicated with the extraction heating boiler, and the son boiler is communicated with the steam heating boiler. It can be seen that the mother furnace integrated heating system provided by this application changes the structure of the mother and son boiler in the prior art, that is, it no longer uses the mother boiler to pre-store a large amount of steam for milk frothing and the son boiler to pre-store extraction water, but uses the mother boiler to pre-store extraction coffee water and the son boiler to pre-store warm water for forming steam, that is, reversing the son boiler and the mother boiler, and cooperating with the extraction heating boiler and the steam heating boiler to achieve rapid, efficient and continuous cup output, and it is ready-to-use and does not require waiting. In addition, the water temperature and steam temperature are stable, ensuring the coffee quality. In addition, the overall machine size is small and more energy-saving.

Description

Technical Field

[0001] The present application relates to the technical field of coffee machines, and particularly to a coffee making system. Background Art

[0002] Currently, coffee machines on the market often adopt the heating methods of mother - son boilers or instant - heating boilers. Among them, the principle of the mother - son boiler is to heat the mother boiler to boiling and store enough steam. The son boiler is located inside the mother boiler, and the water in the son boiler is heated to an appropriate water temperature by the hot water in the mother boiler. Its advantage is that the mother boiler has a large capacity and can store enough energy steam for milk frothing, and the water in the son boiler can be heated simultaneously. Due to sufficient stored energy, the continuous cup - making is relatively stable. However, the disadvantages are also obvious: Since the mother boiler needs to be heated to boiling and store enough steam, that is, a large amount of steam needs to be maintained to meet the demand of continuous cup - making, the mother - son boiler needs to be made with a large capacity, so the pre - heating time is long. In addition, since the son boiler relies on the hot water in the mother boiler to transfer heat through the furnace wall of the son boiler to achieve the heating method, the water temperature in the son boiler is not easy to control and is unstable.

[0003] Among them, the instant - heating boiler instantaneously heats room temperature water into extraction water or steam for milk frothing. Since it is instant heating, the temperature of the extraction water or the steam is extremely unstable. Especially when making steam, the water content of the steam is high, which affects the effect of milk frothing. In addition, due to the low inlet water temperature, more energy is consumed when heating to the preset temperature.

[0004] It can be seen that there are still relatively large problems with the heating structures of existing coffee machines. Therefore, there is an urgent need to develop a heating structure for a coffee machine that can continuously produce cups quickly, efficiently, and with high quality. Summary of the Invention

[0005] The purpose of the present application is to provide a coffee making system, which to a certain extent solves the technical problem in the prior art that there is an urgent need to develop a heating structure for a coffee machine that can continuously produce cups quickly, efficiently, and with high quality.

[0006] The present application provides a coffee making system, including: a mother - son boiler, an extraction heating boiler, and a steam heating boiler; wherein, the mother - son boiler includes a mother boiler and a son boiler disposed inside the mother boiler;

[0007] The mother boiler is connected to the extraction heating boiler, and the son boiler is connected to the steam heating boiler.

[0008] In the above - mentioned technical solution, further, the coffee making system further includes a water storage container, an extraction boiler pump, and a steam boiler pump;

[0009] Among them, the main boiler is connected to the water storage container through the extraction boiler pump; the sub-boiler is connected to the water storage container through the steam boiler pump.

[0010] In any of the above technical solutions, further, the coffee making system further includes a coffee extraction component and a milk frothing component; among them, the coffee extraction component is connected to the extraction heating boiler; the milk frothing component is connected to the steam heating boiler.

[0011] In any of the above technical solutions, further, the coffee making system further includes a first three-way valve, a switch valve, a first waste water container, a first pressure detection component and a first pressure limiting valve;

[0012] Among them, the water outlet of the extraction heating boiler is respectively connected to the coffee extraction component and the first waste water container through the first three-way valve; the exhaust port of the extraction heating boiler is connected to the first waste water container through the switch valve;

[0013] The first pressure detection component is arranged on the extraction heating boiler and is used to detect the water pressure of the extraction heating boiler;

[0014] The first pressure limiting valve is arranged on the pipeline where the first three-way valve is connected to the water outlet of the extraction heating boiler;

[0015] The main boiler is connected to the first waste water container through a pressure relief pipeline, and a pressure valve is arranged on the pressure relief pipeline.

[0016] In any of the above technical solutions, further, the extraction heating boiler includes a first boiler support main body and a first boiler shell, a first heating element and a first conveying pipe fitting embedded in the first boiler support main body; among them, the first heating element and the first conveying pipe fitting are arranged around the periphery of the first boiler shell, and the first heating element is arranged close to the first boiler shell;

[0017] The first boiler shell forms a first heating storage cavity and a water inlet, the water outlet and the exhaust port connected to the first heating storage cavity; the first conveying pipe fitting is connected to the water inlet of the first heating storage cavity;

[0018] The first pressure detection component is arranged on the pipeline where the first conveying pipe fitting is connected to the water inlet of the first heating storage cavity; the first pressure limiting valve is arranged on the pipeline where the first three-way valve is connected to the water outlet of the first heating storage cavity.

[0019] In any of the above technical solutions, further, the extraction heating boiler is an instant heating boiler.

[0020] In any of the above technical solutions, further, the coffee making system further includes a second three-way valve, a second waste water container, and a second pressure limiting valve; wherein, the air outlet of the steam heating boiler is respectively communicated with the milk frothing member and the second waste water container via the second three-way valve;

[0021] The second pressure limiting valve is arranged on the pipeline where the second three-way valve is communicated with the air outlet of the steam heating boiler.

[0022] In any of the above technical solutions, further, the steam heating boiler includes a second boiler support main body, and a second boiler housing, a second heating member, and a second conveying pipe fitting embedded in the second boiler support main body; wherein, the second heating member and the second conveying pipe fitting are arranged around the periphery of the second boiler housing, and the second heating member is arranged close to the second boiler housing;

[0023] The second boiler housing forms a second heating storage cavity, an inlet end communicated with the second heating storage cavity, and the air outlet; the second conveying pipe fitting is communicated with the inlet end of the heating storage cavity; the second pressure limiting valve is arranged on the pipeline where the second three-way valve is communicated with the air outlet of the second heating storage cavity.

[0024] In any of the above technical solutions, further, the steam heating boiler is an instant heating boiler.

[0025] In any of the above technical solutions, further, the mother and child boiler further includes a third heating member, the third heating member is arranged at the inner bottom of the mother boiler and arranged around the periphery of the child boiler; and / or

[0026] The mother boiler has a cylindrical structure; and / or

[0027] The child boiler is a pipe fitting spirally wound along the height direction of the mother boiler.

[0028] Compared with the prior art, the beneficial effects of the present application are as follows:

[0029] The coffee making system provided by the present application changes the structure of the mother and child boiler in the prior art, that is, it no longer uses the mother boiler to pre-store a large amount of steam for milk frothing, and uses the child boiler to pre-store the water for extraction, but uses the mother boiler to pre-store the water for coffee extraction, and uses the child boiler to pre-store the warm water for forming steam, that is, the child boiler and the mother boiler are reversed, and in cooperation with the extraction heating boiler and the steam heating boiler, it can realize rapid, efficient and continuous cup output, and it is ready-to-use and does not need to wait.

[0030] In addition, since the mother boiler in the mother and child boiler does not need to pre-store a large amount of steam, the size of the mother and child boiler is greatly reduced, the occupied space is small, which is helpful for the miniaturization design of the coffee machine.

[0031] In addition, compared with the prior art in which the mother boiler needs to be heated to boiling and maintained at boiling to sustain steam supply and the extraction water temperature in the sub-boiler, in the mother and sub-boilers of the present application, only warm water at half temperature or a specified temperature is pre-stored in the mother boiler. Compared with the prior art in which high-temperature steam is pre-stored in the traditional mother and sub-boilers, it plays an effective role in saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 Structural schematic diagram of the coffee making system provided by an embodiment of the present application;

[0034] Figure 2 Another structural schematic diagram of the coffee making system provided by an embodiment of the present application;

[0035] Figure 3 Assembly drawing of the mother and sub-boilers and the water storage container provided by an embodiment of the present application;

[0036] Figure 4 For Figure 3 Cross-sectional view along the A-A section;

[0037] Figure 5 Structural schematic diagram of the extraction heating boiler provided by an embodiment of the present application;

[0038] Figure 6 Another structural schematic diagram of the extraction heating boiler provided by an embodiment of the present application;

[0039] Figure 7 For Figure 6 Cross-sectional view along the B-B section;

[0040] Figure 8 Structural schematic diagram of the steam heating boiler provided by an embodiment of the present application;

[0041] Figure 9 Another structural schematic diagram of the steam heating boiler provided by an embodiment of the present application;

[0042] Figure 10 For Figure 9 Cross-sectional view along the C-C section.

[0043] Reference numerals:

[0044] 1 - Water storage container, 2 - Extraction boiler pump, 3 - Steam boiler pump, 4 - Mother - and - son boiler, 41 - Mother boiler, 42 - Son boiler, 43 - Third heating element, 44 - Pressure - relief pipeline, 5 - Extraction heating boiler, 51 - First boiler main body, 52 - First boiler housing, 521 - First heating and storage cavity, 53 - First heating element, 54 - First conveying pipe fitting, 55 - First connecting pipeline, 56 - Water inlet, 57 - Water outlet, 58 - Exhaust port, 59 - First temperature sensor, 510 - Water - level sensor, 511 - Third temperature sensor, 512 - Sealing ring, 6 - First three - way valve, 7 - On - off valve, 8 - First waste - water container, 9 - First pressure - detection component, 10 - First pressure - limiting valve, 11 - Coffee extraction component, 12 - Steam heating boiler, 121 - Second boiler support main body, 122 - Second boiler housing, 1221 - Second heating and storage cavity, 123 - Second heating element, 124 - Second conveying pipe fitting, 125 - Second connecting pipeline, 126 - Inlet end, 127 - Air outlet, 128 - Second temperature sensor, 129 - Fourth temperature sensor, 13 - Second three - way valve, 14 - Second waste - water container, 15 - Second pressure - limiting valve, 16 - Milk - foaming component. Detailed implementation mode

[0045] The technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments.

[0046] The components of the embodiments of the present application usually described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application claimed, but merely represents the selected embodiments of the present application.

[0047] All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0048] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0049] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0050] The following refers to Figures 1 to 10 Describe a coffee-making system according to some embodiments of the present application.

[0051] Embodiment 1

[0052] See Figures 1 to 4 As shown, the embodiments of the present application provide a coffee-making system, including: a mother-and-son boiler 4, an extraction heating boiler 5, and a steam heating boiler 12; wherein, the mother-and-son boiler 4 includes a mother boiler 41 and a son boiler 42 disposed inside the mother boiler 41; wherein, the mother boiler 41 is in communication with the extraction heating boiler 5, the son boiler 42 is in communication with the steam heating boiler 12, and both the mother boiler 41 and the son boiler 42 are used for pre-storing warm water.

[0053] Based on the above-described structure, the present application provides a new heating structure for making coffee, which includes a mother-and-son boiler 4, an extraction heating boiler 5, and a steam heating boiler 12. The mother boiler 41 will heat the water to the semi-warm or specified temperature set by the customer, greatly improving the inlet water temperature of the extraction heating boiler 5, enabling the extraction heating boiler 5 to quickly heat the incoming warm water to the preset extraction temperature, achieving fast cup output. In particular, the inner shell of the mother boiler 41 pre-stores water for making multiple cups of extracted coffee, and as the extraction of coffee proceeds, water will also be continuously replenished to the mother boiler 41. Therefore, it is easy to achieve fast and continuous cup output. Moreover, since the water temperature entering the extraction heating boiler 5 is constant, the extraction temperature is constant, which helps to ensure the quality of each cup of coffee.

[0054] Among them, the mother boiler 41 can heat the water in the son boiler 42, greatly improving the inlet water temperature of the steam heating boiler 12, helping to improve the conversion rate of steam, and reducing the water content in the steam, enhancing the effect of milk frothing. Moreover, the son boiler 42 can pre-store warm water for milk frothing, enabling fast and continuous milk frothing operations. And since the inlet water temperature of the steam heating boiler 12 is constant, the steam is more stable, which helps to ensure the quality of each cup of coffee.

[0055] It can be seen that the integrated mother-and-son furnace heating system provided in this application changes the structure of the mother-and-son boilers in the prior art, that is, it no longer uses the mother boiler to pre-store a large amount of steam for milk frothing and the son boiler to pre-store water for extraction, but uses the mother boiler to pre-store water for coffee extraction and the son boiler to pre-store warm water for steam formation. That is, the son boiler and the mother boiler are reversed, and in cooperation with the extraction heating boiler 5 and the steam heating boiler 12, it can achieve rapid and efficient continuous cup output, and it is ready to use immediately without waiting.

[0056] In addition, since the mother boiler 41 in the mother-and-son boiler 4 does not need to pre-store a large amount of steam, the size of the mother-and-son boiler 4 is greatly reduced, occupying less space, which is helpful for the miniaturization design of the coffee machine.

[0057] In addition, compared with the prior art where the mother boiler needs to be heated to boiling and maintained at boiling to maintain steam supply and the extraction water temperature in the son boiler, in the mother-and-son boiler 4 of this application, only semi-warm or specified-temperature warm water is pre-stored in the mother boiler 41. Compared with pre-storing high-temperature steam in the traditional mother-and-son boiler, it plays an effective role in saving energy.

[0058] In this embodiment, preferably, as Figure 1 and Figure 2 shown, the coffee making system further includes a water storage container 1, an extraction boiler pump 2, and a steam boiler pump 3;

[0059] Among them, the mother boiler 41 is connected to the water storage container 1 through the extraction boiler pump 2; the son boiler 42 is connected to the water storage container 1 through the steam boiler pump 3.

[0060] Furthermore, preferably, the coffee making system further includes a coffee extraction component 11 and a milk frothing component 16; among them, the coffee extraction component 11 is connected to the extraction heating boiler 5; the milk frothing component 16 is connected to the steam heating boiler 12. Note: The coffee extraction component 11 is a coffee extraction head in the prior art, and the milk frothing component 16 is a steam injection head for a coffee machine in the prior art, which will not be elaborated here.

[0061] According to the structure described above, the extraction boiler pump 2 provides the power for cup output when extracting coffee, that is, the extraction boiler pump 2 pumps water from the water storage container 1 into the mother boiler 41. The pre-heated warm water in the mother boiler 41 then enters the extraction heating boiler 5 under the action of pressure, and finally is discharged successively through the extraction heating boiler 5 and the coffee extraction component 11 for coffee extraction.

[0062] The steam boiler pump 3 provides the power for steam discharge, that is, the steam boiler pump 3 pumps water from the water storage container 1 into the son boiler 42. The pre-heated warm water in the son boiler 42 then enters the steam heating boiler 12 under the action of pressure, and finally is discharged successively through the steam heating boiler 12 and the milk frothing component 16 for milk frothing.

[0063] In this embodiment, preferably, as Figure 1 and Figure 2 shown, the coffee making system further includes a first three-way valve 6, a switching valve 7, a first waste water container 8, a first pressure detection member 9, and a first pressure limiting valve 10;

[0064] Wherein, the water outlet 57 of the extraction heating boiler 5 is respectively communicated with the coffee extraction member 11 and the first waste water container 8 via the first three-way valve 6; the exhaust port 58 of the extraction heating boiler 5 is communicated with the first waste water container 8 via the switching valve 7;

[0065] The first pressure detection member 9 is arranged on the extraction heating boiler 5 and is used for detecting the water pressure of the extraction heating boiler 5;

[0066] The first pressure limiting valve 10 is arranged on the pipeline where the first three-way valve 6 is communicated with the water outlet 57 of the extraction heating boiler 5. The first pressure limiting valve 10 plays a role in limiting pressure to avoid excessive pressure, and preferably, it is an electronic pressure limiting valve.

[0067] Further, preferably, as Figures 5 to 7 shown, the extraction heating boiler 5 includes a first boiler support main body and a first boiler housing 52, a first heating element 53, and a first conveying pipe fitting 54 embedded in the first boiler support main body; wherein, the first heating element 53 and the first conveying pipe fitting 54 are arranged around the periphery of the first boiler housing 52, and the first heating element 53 is arranged close to the first boiler housing 52. It can be seen that the first heating element 53 is located between the first boiler housing 52 and the first conveying pipe fitting 54 and can heat both of them simultaneously. Both of them are arranged in a spiral shape to increase the heating area and improve the heating effect;

[0068] The first boiler housing 52 forms a first heating storage cavity 521, a water inlet 56, a water outlet 57, and an exhaust port 58 that are communicated with the first heating storage cavity 521; the first conveying pipe fitting 54 is communicated with the water inlet 56 of the first heating storage cavity 521;

[0069] The first pressure detection member 9 is arranged on the first communication pipeline 55, which is the pipeline where the first conveying pipe fitting 54 is connected to the water inlet 56 of the first heating storage cavity 521; the first pressure limiting valve 10 is arranged on the pipeline where the first three-way valve 6 is connected to the water outlet 57 of the first heating storage cavity 521. It can be seen that the warm water output from the mother boiler 41 first flows through the first conveying pipe fitting 54 and is heated by the first heating member 53, and then flows into the first heating storage cavity 521 and is heated by the first heating member 53 again, that is, secondary heating is realized, making the temperature of the entire heating environment higher and more stable. The hot water quickly heated can be stored in the first heating storage cavity 521 to ensure a constant water temperature, further improving the coffee extraction effect, and realizing instant heating and use without waiting. In addition, a stable water pressure is formed in the secondary heating cavity to meet the extraction pressure.

[0070] According to the above-described structure, it can be known that the above structure can realize constant-pressure extraction and variable-pressure extraction. Specifically: Constant-pressure extraction scheme: The first pressure detection member 9 is used to detect the actual pressure value in real time, that is, the pressure in the first boiler housing 52. When the actual pressure value is equal to the preset constant pressure value, the extraction boiler pump 2 operates. At the same time, the first three-way valve 6 is adjusted to connect the water outlet 57 of the first heating storage cavity 521 of the extraction heating boiler 5 to the extraction member for coffee extraction.

[0071] During the coffee extraction process, the first pressure detection member 9 is used to detect the actual pressure value in real time. When the actual pressure value is not equal to the preset constant pressure value, the voltage and frequency of the extraction boiler pump 2 are adjusted to make the actual pressure value equal to the preset constant pressure value.

[0072] After the extraction is completed, the first three-way valve 6 is adjusted to connect the coffee extraction member 11 to the first waste water container 8 to release the pressure in the extraction pipeline into the first waste water container 8. At the same time, the first pressure detection member 9 detects the actual pressure value in the first heating storage cavity 521 of the extraction heating boiler 5. When the actual pressure value is greater than the preset constant pressure value, the first three-way valve 6 is adjusted to connect the water outlet 57 of the first heating storage cavity 521 of the extraction heating boiler 5 to the first waste water container 8 to release the pressure to make the actual pressure value equal to the preset constant pressure value; when the actual pressure value is less than the preset constant pressure value, the first three-way valve 6 is adjusted to close all waterways, and the extraction boiler pump 2 is started to make the actual pressure value reach the preset constant pressure value, and then the extraction boiler pump 2 is closed.

[0073] Variable-pressure extraction scheme: The first pressure detection member 9 is used to detect the actual pressure value in real time. When the actual pressure value is greater than or equal to the lower pressure limit value, the extraction boiler pump 2 operates. At the same time, the first three-way valve 6 is adjusted to connect the water outlet 57 of the first heating storage cavity 521 of the extraction heating boiler 5 to the extraction member to realize the operation of coffee extraction.

[0074] During the coffee extraction process, the first pressure detection component 9 is used to detect the actual pressure value in real time. When the actual pressure value rises to the upper pressure limit value, the voltage and frequency of the extraction boiler pump 2 are adjusted, so that the actual pressure value is maintained and does not exceed the upper pressure limit value;

[0075] After the extraction is completed, the first three-way valve 6 is adjusted to connect the coffee extraction component 11 with the first waste water container 8, so that the pressure in the extraction pipeline is released into the first waste water container 8. At the same time, the first pressure detection component 9 detects the actual pressure value in the first heating storage cavity 521 of the extraction heating boiler 5. And when the actual pressure value is greater than the upper pressure limit value, the first three-way valve 6 is adjusted to connect the water outlet 57 of the first heating storage cavity 521 of the extraction heating boiler 5 with the first waste water container 8 to release the pressure, so that the actual pressure value does not exceed the upper pressure limit value; when the actual pressure value is less than the lower pressure limit value, the first three-way valve 6 is adjusted to close all water circuits, and the extraction boiler pump 2 is started to make the actual pressure value reach the lower pressure limit value, and then the extraction boiler pump 2 is closed.

[0076] Note: Before constant-pressure extraction and variable-pressure extraction, it is necessary to start the extraction boiler pump 2 and adjust the first three-way valve 6 to open the DE water circuit to discharge the air in the first heating storage cavity 521 of the extraction heating boiler 5, and then close the DE water circuit and adjust the parameters of the extraction boiler pump 2 such as voltage and frequency until the actual pressure value is equal to the preset constant pressure value. And during this process, the water level detection component described below is used to monitor the water level at all times.

[0077] Combined with the above, this system can realize both constant-pressure extraction and variable-pressure extraction, so as to modulate coffee with different tastes to meet the different needs of users.

[0078] In this embodiment, preferably, as Figure 5 shown, the coffee making system further includes a first temperature sensor 59, and the detection end of the first temperature sensor 59 extends into the first heating storage cavity 521.

[0079] Combined with the above, the first temperature sensor 59 can detect the water temperature in the first heating storage cavity 521 in real time, more accurately control the extraction temperature, and preferably, the first temperature sensor 59 is an in-probe temperature sensor. In addition, a third temperature sensor 511 can also be integrated on the first boiler main body 51 to monitor the temperature of the furnace body.

[0080] In this embodiment, preferably, as Figure 5 shown, the coffee making system further includes a water level sensor 510, and the detection end of the water level sensor 510 extends into the first heating storage cavity 521.

[0081] As described above, the water level sensor 510 is used to detect the water level in the first heating and storage cavity 521 at all times, avoiding problems such as too low or too high water levels. Preferably, the water level sensor 510 is an in-depth water level sensor 510.

[0082] In this embodiment, preferably, as Figure 7 shown, the first heating element 53 is a heating pipe element, and is arranged in a spiral shape around the outside of the first boiler housing 52; the first conveying pipe element 54 is arranged around the outside of the heating pipe element and is also in a spiral shape.

[0083] In this embodiment, preferably, as Figure 7 shown, the first boiler supporting the first main body includes a first main body and a first top cover. The first main body forms a first installation cavity. The first boiler housing 52 is arranged in the first installation cavity. The second heating element 123 and the second conveying pipe element 124 are embedded in the side wall of the first installation cavity. The first top cover covers the top opening of the first installation cavity to cover the first boiler housing 52. A sealing ring 512 is arranged between the first end cover and the side wall of the first installation cavity. The above-mentioned first temperature sensor 59 and water level sensor 510 can both be integrated on the first top cover. Moreover, the water inlet 56, the water outlet 57, and the exhaust port 58 are all arranged on the first top cover and are provided with connectors.

[0084] In this embodiment, preferably, as Figure 1 and Figure 2 shown, the coffee making system further includes a second three-way valve 13, a milk frothing member 16, a second waste water container 14, and a second pressure limiting valve 15; wherein, the air outlet 127 of the steam heating boiler 12 is respectively connected to the milk frothing member 16 and the second waste water container 14 through the second three-way valve 13; the second pressure limiting valve 15 is arranged on the pipeline connecting the second three-way valve 13 and the air outlet 127 of the steam heating boiler 12.

[0085] Furthermore, preferably, as Figures 8 to 10 shown, the steam heating boiler 12 includes a second boiler supporting main body 121 and a second boiler housing 122, a second heating element 123, and a second conveying pipe element 124 embedded in the second boiler supporting main body 121; wherein, the second heating element 123 and the second conveying pipe element 124 are arranged around the periphery of the second boiler housing 122, and the second heating element 123 is arranged close to the second boiler housing 122;

[0086] The second boiler housing 122 is formed with a second heating storage cavity 1221, an inlet end 126 and an air outlet 127 that communicate with the second heating storage cavity 1221; the second conveying pipe fitting 124 communicates with the inlet end 126 of the heating storage cavity, preferably through a second communication pipeline 125; the second pressure limiting valve 15 is arranged on the pipeline that communicates the second three-way valve 13 with the air outlet 127 of the second heating storage cavity 1221.

[0087] It can be seen that the warm water output from the sub-boiler 42 first flows through the second conveying pipe fitting 124, and is quickly heated into steam by the second heating element 123, and can be stored in the second heating storage cavity 1221, that is, a secondary heating cavity is added, making the temperature of the entire heating environment higher and more stable. Furthermore, the steam is made drier, with a higher and more stable temperature, and the milk frothing time is shorter. In addition, since the water vapor is stored in the secondary heating cavity, a stable steam pressure can be formed in the secondary heating cavity, improving the problem of unstable steam pressure.

[0088] Furthermore, preferably, as Figure 1 and Figure 2 shown, the coffee making system further includes a second pressure limiting valve 15. The second pressure limiting valve 15 is arranged on the pipeline that communicates the second three-way valve 13 with the air outlet 127 of the second heating storage cavity 1221. Moreover, due to the addition of the second pressure limiting valve 15, the pressure in the second heating storage cavity 1221 is maintained below a certain preset pressure value, basically meeting the condition of constant pressure. However, if further pressure control is required, the second pressure sensor can be used to continuously detect the pressure in the second heating storage cavity 1221, and by adjusting the voltage and frequency of the steam boiler pump 3, as well as the power of the second heating element 123, etc., the steam pressure can be comprehensively controlled.

[0089] Furthermore, preferably, the coffee making system further includes a second pressure sensor or a pressure gauge. The second pressure sensor is arranged on the pipeline that communicates between the second pressure limiting valve 15 and the air outlet 127 of the steam heating boiler 12.

[0090] According to the structure described above, the operation of making milk foam using the above structure is as follows:

[0091] After power-on, adjust the three-way valve to connect the second heating storage chamber 1221 of the second boiler housing 122 to the second waste water container 14, discharge the air in the second heating storage chamber 1221 into the second waste water container 14, then close this water circuit, turn on the steam boiler pump 3 and the second heating element 123, pump the warm water in the sub-boiler 42 into the second conveying pipe 124, and heat it into steam. The steam finally enters the second heating storage chamber 1221 and is reheated until the temperature of the steam reaches and maintains at the first preset value. Then turn off the steam boiler pump 3, and adjust the three-way valve to connect the milk frothing component 16 to the second heating storage chamber 1221;

[0092] When milk frothing is needed, turn on the steam boiler pump 3 to eject the pre-stored steam in the second heating storage chamber 1221 for milk frothing. At the same time, the pre-stored warm water in the sub-boiler 42 is pumped into the second conveying pipe 124 and reheated into steam and stored in the second heating storage chamber 1221. The water in the water storage container 1 is replenished into the sub-boiler 42 and heated into warm water. Moreover, during the process of milk frothing, the second temperature sensor 128 is used to detect the temperature of the steam in the second heating storage chamber 1221 in real time. When the temperature fails to reach the preset value, adjust the power of the second heating element 123 to make the temperature of the steam reach and maintain at the preset value;

[0093] After the milk frothing is completed, adjust the three-way valve to connect the milk frothing component 16 to the second waste water container 14, discharge the excess steam in the water circuit into the second waste water container 14, then close this water circuit, turn on the steam boiler pump 3 and the second heating element 123 until the temperature of the steam in the second heating storage chamber 1221 is equal to the preset value. Then turn off the steam boiler pump 3, adjust the three-way valve to connect the milk frothing component 16 to the second heating storage chamber 1221 to prepare for the next milk frothing operation.

[0094] In this embodiment, preferably, as Figure 10 shown, the second heating element 123 is a heating pipe, and it surrounds the outside of the second boiler housing 122 and is arranged in a spiral shape; the second conveying pipe 124 surrounds the outside of the heating pipe and is also arranged in a spiral shape.

[0095] In this embodiment, preferably, as Figure 8 shown, the coffee making system further includes a second temperature sensor 128. The detection end of the second temperature sensor 128 extends into the second heating storage chamber 1221. The second temperature sensor 128 can detect the temperature of the steam in the second heating storage chamber 1221 in real time and accurately, and more precisely control the temperature of milk frothing. In addition, a fourth temperature sensor 129 can be integrated on the second boiler body to monitor the temperature of the furnace body.

[0096] In this embodiment, preferably, as Figure 10 shown, the second boiler supporting the first main body includes a second main body and a second top cover. The second main body is formed with a second installation cavity. The second boiler housing 122 is disposed in the second installation cavity. The second heating element 123 and the second conveying pipe fitting 124 are embedded in the side wall of the second installation cavity. The second top cover covers the top opening of the second installation cavity for covering the second boiler housing 122. And a sealing ring 512 is provided between the second top cover and the side wall of the second installation cavity. The second temperature sensor 128 described above can be integrated on the first top cover. Moreover, the inlet end 126 and the air outlet 127 are both disposed on the second top cover and are provided with connectors. And preferably, the bottom end of the connector disposed at the inlet end 126 extends to the bottom of the second heating storage cavity 1221.

[0097] In the embodiment, preferably, as Figure 3 and Figure 4 shown, the mother and child boiler 4 further includes a third heating element 43. The third heating element 43 is disposed at the inner bottom of the mother boiler 41 and is disposed around the periphery of the child boiler 42.

[0098] According to the structure described above, the third heating element 43 is used to heat the water in the bottom positions of the mother boiler 41 and the child boiler 42. And preferably, the third heating element 43 is a heating pipe.

[0099] Further, preferably, the mother boiler 41 has a cylindrical structure; the child boiler 42 is a pipe fitting spirally arranged along the height direction of the mother boiler 41.

[0100] Further, preferably, in order to detect the temperature and water level in the mother boiler 41, etc., a temperature sensor and a water level sensor 510 may also be provided, and the detection ends both extend into the mother boiler 41.

[0101] Further, preferably, as Figure 1 shown, the mother boiler 41 of the mother and child boiler 4 is also connected to the first waste water container 8 through a pressure relief pipeline 44 for releasing pressure. Preferably, a pressure valve is provided on the pipeline.

[0102] Embodiment Two

[0103] The coffee making system in this embodiment is an improvement based on Embodiment One. The technical content disclosed in Embodiment One will not be described repeatedly. The content disclosed in Embodiment One also belongs to the content disclosed in this embodiment.

[0104] The difference between the coffee-making system shown in this embodiment and that in the first embodiment is as follows: The extraction heating boiler 5 still adopts the structure in the first embodiment, while the steam heating boiler 12 is an instant heating boiler used in existing coffee machines. Such an instant heating boiler can be a supporting structure of an instant heating block and a flow-through pipeline. The instant heating block only heats the flow-through pipeline. The instant heating boiler can also be a structure that only includes a single boiler chamber, and the heating pipe only instantaneously heats this single boiler chamber. In short, this part is prior art and will not be elaborated here.

[0105] Embodiment Three

[0106] The coffee-making system in this embodiment is an improvement based on the first embodiment. The technical content disclosed in the first embodiment will not be described repeatedly, and the content disclosed in the first embodiment also belongs to the content disclosed in this embodiment.

[0107] The difference between the coffee-making system shown in this embodiment and that in the first embodiment is as follows: The steam heating boiler 12 still adopts the structure in the first embodiment, while the extraction heating boiler 5 is an instant heating boiler used in existing coffee machines. Refer to the introduction in the second embodiment for details.

[0108] Embodiment Four

[0109] The coffee-making system in this embodiment is an improvement based on the first embodiment. The technical content disclosed in the first embodiment will not be described repeatedly, and the content disclosed in the first embodiment also belongs to the content disclosed in this embodiment.

[0110] The difference between the coffee-making system shown in this embodiment and that in the first embodiment is as follows: Both the extraction heating boiler 5 and the steam heating boiler 12 are instant heating boilers used in existing coffee machines. Refer to the introduction in the second embodiment for details.

[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A coffee-making system, characterized in that, Including: A mother - and - son boiler, an extraction heating boiler, and a steam heating boiler; wherein, the mother - and - son boiler includes a mother boiler and a son boiler disposed within the mother boiler; The mother boiler is in communication with the extraction heating boiler, and the son boiler is in communication with the steam heating boiler.

2. The coffee making system according to claim 1, characterized in that, The coffee making system further includes a water storage container, an extraction boiler pump, and a steam boiler pump; Wherein, the mother boiler is in communication with the water storage container through the extraction boiler pump; the son boiler is in communication with the water storage container through the steam boiler pump.

3. The coffee making system according to claim 2, characterized in that, The coffee making system further includes a coffee extraction component and a milk frothing component; wherein, the coffee extraction component is in communication with the extraction heating boiler; the milk frothing component is in communication with the steam heating boiler.

4. The coffee making system according to claim 3, characterized in that, The coffee making system further includes a first three - way valve, a switch valve, a first waste water container, a first pressure detection component, and a first pressure limiting valve; Wherein, the water outlet of the extraction heating boiler is respectively in communication with the coffee extraction component and the first waste water container via the first three - way valve; the exhaust port of the extraction heating boiler is in communication with the first waste water container via the switch valve; The first pressure detection component is disposed on the extraction heating boiler and is used to detect the water pressure of the extraction heating boiler; The first pressure limiting valve is disposed on the pipeline where the first three - way valve is in communication with the water outlet of the extraction heating boiler; The mother boiler is in communication with the first waste water container through a pressure - relief pipeline, and a pressure valve is disposed on the pressure - relief pipeline.

5. The coffee making system according to claim 4, characterized in that, The extraction heating boiler includes a first boiler support main body and a first boiler housing, a first heating element, and a first conveying pipe fitting embedded within the first boiler support main body; wherein, the first heating element and the first conveying pipe fitting are disposed around the periphery of the first boiler housing, and the first heating element is disposed close to the first boiler housing; The first boiler housing forms a first heating storage cavity, an inlet, a water outlet, and an exhaust port that are in communication with the first heating storage cavity; the first conveying pipe fitting is in communication with the inlet of the first heating storage cavity; The first pressure detection component is disposed on the pipeline where the first conveying pipe fitting is in communication with the inlet of the first heating storage cavity; the first pressure limiting valve is disposed on the pipeline where the first three - way valve is in communication with the water outlet of the first heating storage cavity.

6. The coffee making system according to claim 3, characterized in that, The extraction heating boiler is an instant heating boiler.

7. The coffee making system according to claim 3, characterized in that, The coffee making system further includes a second three - way valve, a second waste water container, and a second pressure limiting valve; wherein, the gas outlet of the steam heating boiler is respectively in communication with the milk frothing component and the second waste water container via the second three - way valve; The second pressure limiting valve is disposed on the pipeline where the second three - way valve is in communication with the gas outlet of the steam heating boiler.

8. The coffee making system according to claim 7, wherein The steam heating boiler includes a second boiler support main body and a second boiler housing, a second heating element, and a second conveying pipe fitting embedded within the second boiler support main body; wherein, the second heating element and the second conveying pipe fitting are disposed around the periphery of the second boiler housing, and the second heating element is disposed close to the second boiler housing; The second boiler housing is formed with a second heating storage cavity, an inlet end communicating with the second heating storage cavity, and the air outlet; the second conveying pipe fitting is communicated with the inlet end of the heating storage cavity; the second pressure limiting valve is arranged on the pipeline where the second three-way valve is communicated with the air outlet of the second heating storage cavity.

9. The coffee making system according to claim 3, characterized in that, The steam heating boiler is an instant heating boiler.

10. The coffee making system according to any one of claims 1 to 9, characterized in that, The mother-and-son boiler further includes a third heating element, and the third heating element is arranged at the inner bottom of the mother boiler and is arranged around the periphery of the son boiler; and / or The mother boiler has a cylindrical structure; and / or The son boiler is a pipe fitting spirally arranged along the height direction of the mother boiler.

Images