Coffee machine capable of accurately controlling temperature

Abstract

The utility model discloses an accurate temperature control coffee machine which comprises a first boiler chamber, and a heating piece is arranged in the first boiler chamber and used for generating steam in the first boiler chamber. The first boiler chamber is provided with a first temperature detector, and the first temperature detector is used for detecting the steam temperature in the first boiler chamber; the second boiler chamber is arranged in the first boiler chamber; the second boiler chamber is provided with a first communicating opening and a second communicating opening. The brewing head is provided with a hot water outlet and a first flow guide opening, and a conduction cavity is formed in the brewing head; the first flow guide opening is communicated with the second conduction opening through a first pipeline; a second temperature detector is arranged on the first pipeline and used for detecting the water temperature in the first pipeline. The second temperature detector is arranged on the first pipeline which is communicated with the second boiler chamber and the brewing head and is used for directly detecting the real-time temperature of hot water entering the brewing head.

Description

Technical Field

[0001] The utility model relates to the technical field of coffee machines, in particular to a coffee machine with precise temperature control. Background Art

[0002] A coffee machine is a device used to make coffee. Currently, coffee machines generally integrate multiple functions. For example, in addition to extracting coffee, they can also realize functions such as making milk froth and discharging hot water. When frothing milk, steam needs to be discharged to make the milk froth, and when brewing coffee, hot water needs to be discharged through the brewing head.

[0003] In order to realize the separate extraction of steam and hot water in the existing coffee machine, the steam and hot water are generally generated by separate steam generators and heating elements, which results in the need to set up a two-way structure inside the coffee machine and low heat utilization rate.

[0004] In addition, in order to control the temperature of hot water for brewing and the temperature of steam for making milk foam, a temperature detector is usually provided to detect and control the temperature. However, the existing temperature detector for hot water detection is provided at the water return position of the brewing head. The detected temperature is the hot water temperature after brewing, which has a certain temperature difference from the direct brewing temperature, resulting in inaccurate temperature detection results. Utility Model Content

[0005] In order to overcome at least one of the defects of the above-mentioned prior art, the utility model provides a coffee machine with precise temperature control, wherein a first temperature detector and a second temperature detector detect the steam temperature and the hot water temperature respectively, and the second temperature detector is arranged on the first pipe connecting the second boiler chamber and the brewing head, so as to directly detect the real-time temperature of the hot water entering the brewing head, thereby improving the temperature accuracy.

[0006] The technical solution adopted by the utility model to solve the problem is:

[0007] A coffee machine with precise temperature control, comprising:

[0008] a first boiler room, wherein a heating element is disposed in the first boiler room, and the heating element is used to generate steam in the first boiler room; and a first temperature detector is disposed in the first boiler room, and the first temperature detector is used to detect the steam temperature in the first boiler room;

[0009] a second boiler room, the second boiler room being arranged in the first boiler room, the second boiler room exchanging heat with the first boiler room to heat the second boiler room; the second boiler room being provided with a first conduction port and a second conduction port; the first conduction port being used to introduce or export water flow;

[0010] A brewing head, wherein the brewing head is provided with a hot water outlet and a first guide port, a conduction cavity connected with the first guide port is provided in the brewing head, the hot water outlet is connected with the conduction cavity and is used to output hot water; the first guide port is connected with the second conduction port through a first pipe; a second temperature detector is provided on the first pipe, and the second temperature detector is used to detect the water temperature in the first pipe.

[0011] Furthermore, a temperature detection port is provided at the top of the first boiler room, and the first temperature detector is installed at the temperature detection port and extends into the temperature detection port.

[0012] Furthermore, the top of the first boiler room is provided with an extension port, and the top of the second boiler room extends from the extension port; the second conduction port is provided at the top of the second boiler room; the second conduction port is provided with a connecting joint, one end of the connecting joint is connected with the second conduction port, and the other end of the connecting joint is connected with the first pipeline; the middle end of the connecting joint is provided with an installation port, and the second temperature detector extends from the installation port and is used to detect the water temperature in the first pipeline.

[0013] Furthermore, the brewing head is provided with a second flow guide port, and the second flow guide port is connected with the first conduction port through a second pipe.

[0014] Furthermore, the first conducting port is provided with a valve body, the valve body is provided with a first interface, a second interface and a third interface, the first interface is communicated with the second boiler room; the second interface is communicated with the second pipeline.

[0015] Furthermore, a first blocking piece is provided in the conduction cavity, and the first guide port and the second guide port are distributed up and down in the axial direction of the conduction cavity; a guide port is provided at the bottom end of the conduction cavity, and the first blocking piece is used to move closer to or away from the guide port under the action of external force to block or open the guide port; the hot water outlet is connected to the guide port.

[0016] Furthermore, an adjusting chamber is provided in the brewing head, the guide outlet is connected to the adjusting chamber, the adjusting chamber is provided with an adjusting member, the adjusting member has a pressing portion, the adjusting member is used to drive the pressing portion to move closer to or away from the guide outlet under the action of an external force, the pressing portion is used to press the first blocking member after moving closer to the guide outlet to make the first blocking member move away from the guide outlet; the hot water outlet is connected to the adjusting chamber.

[0017] Furthermore, the first sealing member includes a first sealing head and a first elastic component, wherein the first elastic component is disposed between the first sealing head and an inner wall of the conducting cavity, and the first elastic component is used to provide a first elastic stress for driving the first sealing head to move closer to the guide outlet.

[0018] Furthermore, a pressure relief channel is provided in the brewing head, and a pressure relief port is provided at the bottom end of the regulating cavity, and the pressure relief port is connected to the pressure relief channel; a second blocking member is provided in the pressure relief channel; the second blocking member can move close to or away from the pressure relief port to block or open the pressure relief port; the pressing portion is used to move close to the pressure relief port after moving away from the guide port to press the second blocking member so that the second blocking member is away from the pressure relief port.

[0019] Furthermore, the second sealing member includes a second sealing head and a second elastic component, the second elastic component is arranged between the second sealing head and the inner wall of the pressure relief channel, and the second elastic component is used to provide a second elastic stress that drives the second sealing head to move closer to the pressure relief port.

[0020] In summary, the utility model has the following technical effects:

[0021] 1. The water in the second boiler room is heated by heat exchange in the first boiler room, so that when brewing coffee alone, hot water can be extracted, and the waste heat of the first boiler room can be used. The heating element of the first boiler room can heat and generate steam, and the steam can also be extracted to the steam wand of the coffee machine through the steam conduit of the first boiler room, and the steam can be guided to be extracted for making milk froth. In other words, the steam can be extracted alone to make milk froth, and can also be used to heat the water for brewing coffee. In this way, the heat utilization rate is higher and resources are saved.

[0022] 2. By arranging the second temperature detector in the first pipe, the first pipe is located between the hot water outlet of the second boiler chamber and the hot water inlet of the brewing head. In this way, the hot water temperature detected by the second temperature detector is the temperature of the hot water introduced into the brewing head, that is, the temperature detection is performed before the hot water is discharged. In this way, the water outlet temperature of the brewing head can be accurately fed back, thereby improving the taste of the coffee. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 It is a cross-sectional view of the utility model;

[0025] Figure 3 It is a cross-sectional view of the brewing head of the utility model;

[0026] Figure 4 It is a structural schematic diagram of the first boiler room of the utility model;

[0027] Figure 5 It is a schematic diagram of the structure of the brewing head of the utility model.

[0028] The meanings of the reference numerals are as follows: 10, first boiler chamber; 20, second boiler chamber; 21, connecting joint; 30, first temperature detector; 40, second temperature detector; 50, first pipeline; 60, second pipeline; 70, brewing head; 71, hot water outlet; 72, pressure relief channel; 73, conduction cavity; 731, first flow guide port; 732, second flow guide port; 733, first plugging head; 734, first elastic component; 74, adjusting cavity; 75, adjusting member; 751, top pressure portion; 761, second plugging head; 762, second elastic component; 77, adjusting handle; 80, valve body; 81, first interface; 82, second interface; 83, third interface. DETAILED DESCRIPTION

[0029] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0032] See also Figure 1-Figure 5 The utility model discloses a coffee machine with precise temperature control, including a first boiler chamber 10, a second boiler chamber 20 and a brewing head 70. A heating element is provided in the first boiler chamber 10, and the heating element can generate steam in the first boiler chamber 10. The specific heating element can be a heating resistor, a heating wire, or a heating coil in the prior art, and generates steam by heating water in the first boiler chamber 10. A first temperature detector 30 is provided in the first boiler chamber 10, and the first temperature detector 30 can detect the steam temperature in the first boiler chamber 10.

[0033] The second boiler room 20 is arranged in the first boiler room 10, and the second boiler room 20 performs heat exchange with the first boiler room 10, so that the water in the second boiler room 20 can be heated by the heat exchange of the first boiler room. The second boiler room 20 is provided with a first conduction port and a second conduction port, and the first conduction port is used to introduce or export water flow.

[0034] The brewing head 70 is provided with a hot water outlet 71 and a first flow guide port 731, and a conduction cavity 73 is provided inside the brewing head 70, the hot water outlet 71 is connected with the conduction cavity 73, and the hot water outlet 71 can output hot water for brewing coffee. The first flow guide port 731 is connected with the second conduction port through the first pipe 50; the first pipe 50 is provided with a second temperature detector 40, and the second temperature detector 40 is used to detect the water temperature in the first pipe 50.

[0035] On the basis of the above structure, when using the coffee machine with precise temperature control of the utility model, when making coffee drinks, water can be introduced into the first boiler chamber 10, and at the same time, water can be introduced into the second boiler chamber 20 through the first conducting port. The heating in the first boiler chamber 10 is used to generate steam through the heating element in the first boiler chamber 10. The steam can exchange heat with the water in the second boiler chamber 20 to heat the water in the second boiler chamber 20. The hot water for heating the water can be introduced into the first guide port 731 of the brewing head 70 through the second conducting port. The first guide port 731 can guide the hot water to the conducting cavity 73, and then it is discharged through the hot water outlet 71 to brew coffee.

[0036] In this way, the heat exchange in the first boiler room can be used to heat the second boiler room 20, so that when brewing coffee alone, hot water can be extracted, and the waste heat in the first boiler room can be used. The heating element of the first boiler room can heat and generate steam, and the steam can also be extracted to the steam wand of the coffee machine through the steam conduit of the first boiler room 10, and the steam can be guided to be extracted to make milk foam, that is, the steam can be extracted alone to make milk foam, and can also be used to heat the water for brewing coffee, so that the heat utilization rate is higher and resources are saved.

[0037] It should also be noted that during the beverage making process, since the steam generation requires a certain temperature, in order to ensure stable steam output, a first temperature detector 30 can be set in the first boiler room 10 to detect the steam temperature in the first boiler room 10 so that the steam can be generated stably.

[0038] Compared with the prior art, the temperature detector for detecting the hot water for brewing coffee is set at the water inlet or water return position of the hot water for coffee, which will result in the detected temperature being the water temperature after the hot water flows a certain path, which will have a certain temperature difference with the actual brewing water temperature, resulting in a certain gap with the actual required coffee brewing water temperature, thus affecting the brewing taste. Therefore, in the present application, by setting the second temperature detector 40 in the first pipe 50, the first pipe 50 is located between the hot water outlet 71 of the second boiler chamber 20 and the hot water inlet of the brewing head 70, so that the hot water temperature detected by the second temperature detector 40 is the temperature of the hot water introduced into the brewing head 70, that is, the temperature detection is performed before the hot water is discharged, so that the water outlet temperature of the brewing head 70 can be accurately fed back, thereby improving the taste of the coffee.

[0039] It should be noted that the first temperature detector 30 and the second temperature detector 40 can be implemented by using structures such as NTC temperature detectors or temperature sensors in the prior art.

[0040] Furthermore, in order to facilitate the detection of the steam temperature in the first boiler room 10, a temperature detection port can be provided at the top of the first boiler room 10, and the first temperature detector 30 can be installed at the temperature detection port and extended through the temperature detection port. Specifically, after the first temperature detector 30 is installed at the temperature detection port, the assembly gap between the first temperature detector 30 and the temperature detection port can clamp a sealing ring to achieve sealing at the installation position to prevent internal temperature steam leakage. The first temperature detector 30 is arranged at the top of the first boiler room 10, and the steam can rise and concentrate at the top of the first boiler room 10 after it is generated, so the first temperature detector 30 can detect the steam temperature concentrated at the top of the first boiler room 10, so that the detection result is more accurate.

[0041] Furthermore, a projection port may be provided at the top of the first boiler room 10, and the top of the second boiler room 20 extends from the projection port, so that the second boiler room 20 can be led out, and the portion of the second boiler room 20 connected to the projection port may be sealed with a sealing ring to reduce leakage of internal steam through the projection port.

[0042] The second conduction port is arranged at the top of the second boiler room 20, so that the second conduction port is provided with a connection joint 21, one end of the connection joint 21 is connected to the second conduction port, and the other end of the connection joint 21 is connected to the first pipe 50, and the first pipe 50 can be connected outside the first boiler room 10. In addition, a mounting port is arranged at the middle end of the connection joint 21, and the second temperature detector 40 extends from the mounting port to detect the water temperature in the first pipe 50, so that the second temperature detector 40 is assembled to the mounting port to perform temperature detection.

[0043] In this case, the first pipe 50 can be connected by setting the connecting joint 21, the first pipe 50 can be connected to the connecting joint 21, and the hot water derived from the second conducting port can be derived through the connecting joint 21 and flow into the first pipe 50. In this way, the temperature detected by the second temperature detector 40 can be the hot water temperature directly derived from the second boiler room 20, and the detected temperature is more accurate.

[0044] Specifically, the connecting joint 21 can be a pipe joint in the selected technology, such as a threaded joint, a plug-in joint, etc., which is used to connect pipes and is convenient for disassembly and assembly.

[0045] It should be noted that the first boiler room 10 can be formed by a shell made of heat-insulating metal in the prior art, and the interior of the shell can be formed into a chamber for storing steam and water, while the second boiler room 20 can be formed by a heat exchange pipe structure arranged in the first boiler room 10, and the heat exchange pipe can be made of heat-conducting metal, so that rapid heat exchange can be achieved between steam and water in the second boiler room 20, and the heat utilization rate is higher.

[0046] In this embodiment, since the second boiler room 20 is connected to the first boiler room 10 by a heat exchange pipe, its top end needs to be sealed after extending from the extension port, and the first pipe 50 can be assembled outside the first boiler room 10, which is convenient for assembly and disassembly. In other cases, the second boiler room 20 can also be integrally formed or welded with the first boiler room 10, so there is no need to separately provide the above-mentioned extension port and sealing structure.

[0047] Furthermore, the brewing head 70 is provided with a second guide port 732, and the second guide port 732 is connected to the first guide port through the second pipe 60. Based on this structure, when brewing coffee, part of the hot water in the second boiler chamber 20 can enter the first pipe 50 through the second guide port, and then be guided to the first guide port 731 of the brewing head 70 through the first pipe 50. In addition, part of the hot water in the second boiler chamber 20 can enter the second pipe 60 through the first guide port, and enter the second guide port 732 of the brewing head 70 through the second pipe 60. The first guide port 731 and the second guide port 732 are simultaneously introduced into the hot water brewing head 70, thereby increasing the amount of hot water extracted.

[0048] Of course, when coffee is not brewed, one of the first guide port 731 or the second guide port 732 can be used as a water return port. In this embodiment, the first guide port 731 and the second guide port 732 are distributed up and down. When coffee is not brewed, the upper first guide port 731 is used for water inlet, and the lower second guide port 732 can be used as a water return port. In this way, when coffee is not brewed, hot water in the second boiler chamber 20 can be introduced into the second boiler chamber 20 through the first guide port 731, and then enters the conduction cavity 73, and then returns through the second guide port 732 of the conduction cavity 73 to realize water circulation, and the brewing head 70 can be preheated to keep the brewing head 70 within a predetermined temperature range, so as to avoid cooling of the brewing head 70 when coffee is not brewed, and then it is difficult to quickly reach the required temperature when brewing coffee, affecting the taste of the brewed coffee, and the inside of the brewing head 70 can also be circulated and flushed.

[0049] Furthermore, a valve body 80 may be provided at the first conducting port, and the valve body 80 may be provided with a first interface 81, a second interface 82 and a third interface 83. The first interface 81 is communicated with the second boiler chamber 20, and the second interface 82 is communicated with the second pipe 60, while the third interface 83 may be used to import or export water flow. When brewing coffee, the third interface 83 may be communicated with the water pipe. In the initial state, the water flow may be guided to the first interface 81 through the third interface 83, and then enter the second boiler chamber 20 through the first conducting port. Steam may heat the water in the second boiler chamber 20, and the heated hot water may then enter the first pipe 50 through the second conducting port and be guided to the brewing head 70 to perform the coffee brewing action.

[0050] When the hot water in the second boiler room 20 is hot enough, the second interface 82 can also be opened. The second interface 82 can also guide the hot water in the second boiler room 20 to the second pipe 60 through the bottom end, and then guide the second pipe 60 into the second guide port 732 to the conduction cavity 73 to increase the amount of hot water.

[0051] It should be noted that the valve body 80 can be selected as a three-way solenoid valve in the prior art, so that the switching of the water circuit can be achieved.

[0052] Furthermore, a first blocking member may be provided in the conduction cavity 73, the first guide port 731 and the second guide port 732 are distributed axially up and down in the conduction cavity 73, and a guide port is provided at the bottom end of the conduction cavity 73, and the first blocking member is used to move closer to or away from the guide port under the action of external force to block or open the guide port; the hot water outlet 71 is connected to the guide port.

[0053] Based on this structure, the coffee machine has the following usage states:

[0054] In the coffee brewing state, hot water is introduced into the conduction cavity 73 through the first guide port 731 and / or the second guide port 732. At this time, the first blocking member can be moved away from the guide port under the action of external force, and the conduction cavity 73 is connected to the hot water outlet 71 through the guide port. In this way, the hot water in the conduction cavity 73 can be guided to the hot water outlet 71 through the guide port to complete the coffee brewing action.

[0055] When the brewing head 70 needs to be flushed with water, the first blocking member can be blocked at the outlet position, the conducting cavity 73 is closed, and the hot water outlet 71 no longer discharges water. In this way, the first guide port 731 can guide hot water into the conducting cavity 73, and then the second guide port 732 guides the water in the conducting cavity 73 to flow back to the second boiler room 20, and the cycle is repeated to achieve water circuit flushing.

[0056] Since the first guide port 731 and the second guide port 732 are distributed up and down, water can be introduced into the first guide port 731 and flow downward to the second guide port 732 for export, which conforms to the natural flow law of water and reduces the use of water power.

[0057] Furthermore, an adjusting chamber 74 is provided in the brewing head 70, the outlet is connected to the adjusting chamber 74, and an adjusting member 75 is provided in the adjusting chamber 74, the adjusting member 75 has a pressing portion 751, so that the adjusting member 75 can drive the pressing portion 751 to move close to or away from the outlet under the action of an external force, and the pressing portion 751 can press the first blocking member after moving close to the outlet to make the first blocking member move away from the outlet, and the hot water outlet 71 is connected to the adjusting chamber 74.

[0058] On the basis of this structure, when the above-mentioned use state is switched, the adjusting member 75 can be driven to rotate or move linearly by external force, so that the pressing portion 751 of the adjusting member 75 approaches or moves toward the outlet, and the above-mentioned first blocking member extends from the outlet to the adjusting chamber 74. In this way, after the pressing portion 751 of the adjusting member 75 approaches the outlet, it can press the first blocking member upward to drive the first blocking member away from the outlet, so that the outlet is connected to the adjusting chamber 74, and the hot water is guided to the adjusting chamber 74 through the outlet, and then guided to the hot water outlet 71 through the adjusting chamber 74, so as to realize the coffee brewing action. In addition, when the hot water is discharged, it first passes through the adjusting chamber 74 for water pressure buffering, and then enters the hot water outlet 71, so as to reduce the splashing caused by excessive water pressure of the hot water outlet, and the discharged water flow is moderate.

[0059] In the water return state, the adjusting member 75 can be rotated or linearly moved so that the pressing portion 751 of the adjusting member 75 is away from the outlet. In this way, the first blocking member can be reset and closed at the outlet position, so that the conducting cavity 73 is closed, thereby realizing the water return circulation.

[0060] It should be noted that the adjustment member 75 in this embodiment can be selected to be a cam or eccentric wheel structure. The cam or eccentric wheel structure is hinged on the side wall of the adjustment chamber 74 which can be rotatable through a rotating shaft. By arranging an adjustment handle 77 on the rotating shaft, the rotation of the adjustment handle 77 drives the cam or eccentric wheel to move eccentrically. At this time, the protruding structure of the cam or eccentric wheel can be formed into the above-mentioned pressing portion 751, thereby realizing the pressing or separation of the first blocking member.

[0061] Of course, the adjustment member 75 can also be implemented as a slider or button structure. By extending the end of the slider or button out of the adjustment cavity 74, the first blocking member can be pressed or reset by sliding up and down or pushing and pulling forward and backward by hand.

[0062] Furthermore, the first plugging member includes a first plugging head 733 and a first elastic component 734. The first elastic component 734 is disposed between the first plugging head 733 and the inner wall of the conducting cavity 73. The first elastic component 734 can provide a first elastic stress that drives the first plugging head 733 to move closer to the outlet. In this way, after the adjusting member 75 rotates until the pressing portion 751 presses the first plugging head 733 upward, the first elastic component 734 is compressed, and the first plugging head 733 is pushed away from the outlet by the pressing portion 751. At this time, the outlet is opened, and the conducting cavity 73 is connected with the adjusting cavity 74. When resetting, the pressing portion 751 of the adjusting member 75 is away from the outlet, and the first elastic stress provided by the resetting of the first elastic component 734 can drive the first plugging head 733 to repeatedly close the outlet.

[0063] Of course, when the first sealing member is not provided with the first elastic component 734, an elastic member can also be provided in the adjusting cavity 74. The elastic member can pull the first sealing member downward to close the guide outlet. At this time, the top end of the first sealing member can extend from the top end of the conducting cavity 73, and the first sealing member can be pulled upward to open the guide outlet, and the elastic member can be reset downward.

[0064] Without providing an elastic component, an adjusting screw structure may also be provided at the top of the first blocking member, so that the adjusting screw can be rotated to drive the first blocking member to approach or move away from the outlet structure below.

[0065] Furthermore, a pressure relief channel 72 may be provided in the brewing head 70, and a pressure relief port may be provided at the bottom end of the regulating cavity 74, the pressure relief port being connected to the pressure relief channel 72. Specifically, a second blocking member is provided in the pressure relief channel 72; the second blocking member may move close to or away from the pressure relief port to block or open the pressure relief port; the pressing portion 751 is used to move close to the pressure relief port after moving away from the outlet to press the second blocking member to keep the second blocking member away from the pressure relief port.

[0066] On the basis of this structure, after the coffee brewing action is completed, the pressing portion 751 of the adjusting member 75 can be rotated toward the pressure relief port, and the second blocking member can be pushed away from the pressure relief port. At this time, the first blocking member is reset to close the outlet. Since the hot water is firstly discharged to the hot water outlet 71 through the adjusting chamber 74, after the brewing is completed, there will inevitably be residual water in the adjusting chamber 74. At this time, the first blocking member is closed and the second blocking member is opened, and the residual water in the adjusting chamber 74 can be discharged through the pressure relief port. In this way, the rainwater discharged from the pressure relief channel 72 can be recovered through the water tank of the coffee machine.

[0067] More specifically, the second plugging member includes a second plugging head 761 and a second elastic component 762. The second elastic component 762 is disposed between the second plugging head 761 and the inner wall of the pressure relief channel 72. The second elastic component 762 is used to provide a second elastic stress that drives the second plugging head 761 to move closer to the pressure relief port. In this way, the second plugging head 761 can be pushed away from the pressure relief port by the pressing portion 751 of the adjusting member 75. The second plugging head 761 opens the pressure relief port, and the pressure relief port guides the remaining water to the pressure relief channel 72. Thereafter, the adjusting member 75 rotates until the pressing portion 751 is away from the pressure relief port. At this time, the second elastic stress provided by the reset of the second elastic component 762 can drive the second plugging head 761 to maintain the state of closing the pressure relief port.

[0068] Of course, when the above-mentioned adjusting member 75 is a cam structure or an eccentric wheel structure, during the rotation of the adjusting member 75, the pressing portion 751 formed by the protruding structure of the cam or the eccentric wheel can press the first blocking member when rotating upward, and can also press the second blocking member when rotating downward. One adjusting member 75 can adjust the blocking state of the two blocking members.

[0069] In addition, it should be noted that the first blocking member is provided with a first push rod extending out of the outlet, and the second blocking member can be provided with a second push rod extending to the pressure relief port, so that the pressing portion 751 of the adjusting member 75 can press the first push rod or the second push rod. In addition, the first elastic component and the second elastic component can be selected as a spring structure in the prior art, or can be selected as an elastic rubber block structure, etc.

[0070] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A coffee machine with precise temperature control, characterized in that: include, a first boiler room, wherein a heating element is disposed in the first boiler room, and the heating element is used to generate steam in the first boiler room; and a first temperature detector is disposed in the first boiler room, and the first temperature detector is used to detect the steam temperature in the first boiler room; a second boiler room, the second boiler room being arranged in the first boiler room, the second boiler room exchanging heat with the first boiler room to heat the second boiler room; The second boiler room is provided with a first conduction port and a second conduction port; the first conduction port is used to introduce or export water flow; A brewing head, wherein the brewing head is provided with a hot water outlet and a first guide port, a conduction cavity connected with the first guide port is provided in the brewing head, the hot water outlet is connected with the conduction cavity and is used to output hot water; the first guide port is connected with the second conduction port through a first pipe; a second temperature detector is provided on the first pipe, and the second temperature detector is used to detect the water temperature in the first pipe.

2. The coffee machine with precise temperature control according to claim 1, characterized in that: A temperature detection port is provided at the top of the first boiler room, and the first temperature detector is installed at the temperature detection port and extends into the temperature detection port.

3. The coffee machine with precise temperature control according to claim 1, characterized in that: The top of the first boiler room is provided with an extension port, and the top of the second boiler room extends out from the extension port; the second conduction port is provided at the top of the second boiler room; the second conduction port is provided with a connecting joint, one end of the connecting joint is connected with the second conduction port, and the other end of the connecting joint is connected with the first pipeline; the middle end of the connecting joint is provided with an installation port, and the second temperature detector extends from the installation port and is used to detect the water temperature in the first pipeline.

4. The coffee machine with precise temperature control according to claim 1, characterized in that: The brewing head is provided with a second flow guide port, and the second flow guide port is communicated with the first conduction port through a second pipe.

5. The coffee machine with precise temperature control according to claim 4, characterized in that: The first conducting port is provided with a valve body, and the valve body is provided with a first interface, a second interface and a third interface, the first interface is communicated with the second boiler room; the second interface is communicated with the second pipeline.

6. The coffee machine with precise temperature control according to claim 4, characterized in that: A first blocking piece is provided in the conduction cavity, and the first guide port and the second guide port are distributed up and down in the axial direction of the conduction cavity; a guide port is provided at the bottom end of the conduction cavity, and the first blocking piece is used to move closer to or away from the guide port under the action of external force to block or open the guide port; the hot water outlet is in conduction with the guide port.

7. The coffee machine with precise temperature control according to claim 6, characterized in that: An adjusting chamber is provided in the brewing head, the outlet is connected to the adjusting chamber, the adjusting chamber is provided with an adjusting member, the adjusting member has a pressing portion, the adjusting member is used to drive the pressing portion to move close to or away from the outlet under the action of an external force, the pressing portion is used to press the first blocking member after moving close to the outlet to make the first blocking member away from the outlet; the hot water outlet is connected to the adjusting chamber.

8. The coffee machine with precise temperature control according to claim 7, characterized in that: The first sealing member includes a first sealing head and a first elastic component, wherein the first elastic component is disposed between the first sealing head and the inner wall of the conducting cavity, and the first elastic component is used to provide a first elastic stress driving the first sealing head to move closer to the guide outlet.

9. The coffee machine with precise temperature control according to claim 7, characterized in that: A pressure relief channel is also provided in the brewing head, and a pressure relief port is provided at the bottom end of the regulating cavity, and the pressure relief port is connected to the pressure relief channel; a second blocking member is provided in the pressure relief channel; the second blocking member can move close to or away from the pressure relief port to block or open the pressure relief port; the pressing portion is used to move close to the pressure relief port after moving away from the guide port to press the second blocking member so that the second blocking member is away from the pressure relief port.

10. The coffee machine with precise temperature control according to claim 9, characterized in that: The second sealing member includes a second sealing head and a second elastic component, wherein the second elastic component is disposed between the second sealing head and the inner wall of the pressure relief channel, and the second elastic component is used to provide a second elastic stress that drives the second sealing head to move closer to the pressure relief port.

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