A wrap-around thermal cycle coffee machine boiler

Abstract

The present application belongs to the technical field of coffee boiler, and discloses a surrounding heat cycle coffee boiler, which comprises a boiler cylinder, a sub-boiler cylinder connected to the right side of the boiler cylinder, and a water supply assembly arranged in the interior of the boiler cylinder and used for supplying water into the sub-boiler cylinder. The surrounding heat cycle water supply path is constituted by the design of the water supply assembly, the heating assembly and the heat energy cycle preheating assembly. The cold water is no longer directly injected into the water jacket, but first enters the spiral pipe in the interior of the water jacket to be preheated in a first stage, is then injected into the fixed sleeve to be subjected to secondary heat exchange after absorbing the residual heat of the water jacket, and finally enters the water jacket to be finally heated. The water supply mode of the staged preheating makes the supplementary water source entering the water jacket have obtained sufficient heat energy reserve, avoids the problem of sudden drop of water temperature caused by direct injection of cold water, and ensures that the water temperature is always maintained in the best coffee extraction interval of -℃ during the continuous multi-cup extraction process.

Description

Technical Field

[0001] This invention belongs to the field of coffee machine boiler technology, specifically a surround-type heat circulation coffee machine boiler. Background Technology

[0002] Currently, coffee machine boilers on the market mainly adopt thermal storage boilers, including single-boiler heat exchange type and dual-boiler type and instant boilers. Thermal storage boilers store a large amount of hot water in a sealed cavity and use heating blocks or heating tubes to maintain the water temperature to provide the energy required for extraction and steam. Instant boilers, on the other hand, eliminate the water storage cavity and use high-power heating wires to instantly heat the cold water flowing through a thin pipe. These two technical solutions aim to solve the basic requirements of water temperature stability and steam supply in the coffee making process through different physical structures.

[0003] However, for storage-type boilers, due to their reliance on static water heating, there is a serious problem of thermal inertia, resulting in long preheating times. Furthermore, during continuous extraction, the replenishment of cold water causes drastic temperature fluctuations in the boiler, leading to insufficient extraction and a sour flavor in the subsequent coffee. For instant boilers, although preheating is faster, the rapid flow of water through the pipes and the predominantly unilateral heating easily cause uneven heating, resulting in a temperature difference between the center of the water and the pipe wall. This prevents the provision of saturated heat energy, leading to thin coffee crema and a weak extracted flavor. Therefore, a surround-type thermal circulation coffee machine boiler is proposed to solve the above problems. Summary of the Invention

[0004] To address the problems mentioned in the background section, the present invention provides a surround-type heat circulation coffee machine boiler, including a boiler drum, with an auxiliary boiler drum connected to the right side of the boiler drum, and further including... A water supply assembly, which is installed inside the boiler drum, is used to supply water to the auxiliary boiler drum; A heating assembly, which is located inside the auxiliary furnace cylinder, is used to heat the water used for brewing coffee to a specified temperature; The thermal energy circulation preheating component is installed inside the boiler drum. It is used to supplement the water source for heating the heating component and to preheat the water source in the water supply component. This reduces the temperature difference between the supplemented water source and the original hot water for making coffee, thus avoiding drastic temperature fluctuations.

[0005] Preferably, the water supply assembly includes a water pump, the input end of which is connected to a water inlet pipe, and a baffle plate is connected inside the boiler drum, with the water inlet pipe extending through the baffle plate to the bottom of the baffle plate.

[0006] Preferably, the heating assembly includes a heating tube, which is fixedly installed on the auxiliary furnace cylinder. A water storage jacket is fixedly installed on the top of the inner wall of the auxiliary furnace cylinder. The heating tube is located inside the water storage jacket. A liquid outlet pipe is connected to the surface of the water storage jacket through a valve. A spiral tube is provided inside the water storage jacket, and the bottom end of the spiral tube extends to the bottom of the water storage jacket.

[0007] Preferably, the thermal energy circulation preheating component includes a fixed sleeve, which is fixedly installed on the top of the inner wall of the boiler drum. A fixed pipe is rotatably connected inside the fixed sleeve. Inside the fixed sleeve, a stirring and conveying component stirs the preheated water source inside the water storage jacket and fully exchanges heat with the unheated water source. The top of the fixed pipe is driven by a driving component to actively run. A main delivery pipe is connected to the fixed sleeve and is connected to the surface of the water storage jacket. The bottom end of the fixed pipe extends to the bottom of the fixed sleeve and is connected to the output end of the water pump through a rotary joint. The top end of the fixed pipe is connected to a secondary delivery pipe through a rotary joint. The end of the secondary delivery pipe away from the fixed pipe is connected to a spiral pipe. The end of the spiral pipe away from the secondary delivery pipe is connected to a return pipe. A dynamic thermal balance component is used on the water storage jacket to detect and balance the temperature of the water source heated by the heating pipe inside the water storage jacket.

[0008] Preferably, the stirring and conveying component includes a conveying blade connected to a fixed pipe, the surface of the conveying blade being in clearance fit with the inner wall of the fixed sleeve, and a stirring block being connected to the conveying blade.

[0009] Preferably, the driving component includes a drive motor, which is fixedly installed on the inner wall of the boiler drum. The output section of the drive motor is connected to a drive wheel, and a driven wheel is connected to the surface of the fixed pipe. The drive wheel is connected to the driven wheel via a synchronous belt.

[0010] Preferably, the dynamic thermal balance component includes a main temperature sensor, which is fixedly installed on the surface of the water storage jacket. A secondary temperature sensor is fixedly installed on the return pipe. An electric three-way valve is connected to the return pipe. The left end of the electric three-way valve is connected to the surface of the fixed jacket. The top end of the electric three-way valve is connected to a guide pipe, which is connected to the surface of the main delivery pipe.

[0011] Preferably, the bottom of the fixing sleeve is connected to a drain pipe, which is controlled to open / close by a valve.

[0012] Preferably, the water storage jacket is connected to a pressure relief valve, and the other end of the pressure relief valve is connected to a pressure relief pipe.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention constructs a circular thermal circulation water supply path through the design of a water supply component, a heating component, and a thermal energy circulation preheating component. Cold water is no longer directly injected into the water storage jacket, but first enters the spiral tube inside the water storage jacket for primary circular preheating, absorbing the residual heat of the water storage jacket before entering the fixed jacket for secondary heat exchange, and finally entering the water storage jacket to complete the final heating. This staged preheating water supply method ensures that the replenishing water source entering the water storage jacket has sufficient thermal energy reserves, avoiding the problem of sudden temperature drop caused by direct injection of cold water, and ensuring that the water temperature is always maintained in the optimal coffee extraction range of 90-96℃ during continuous extraction of multiple cups.

[0014] Furthermore, through the coordinated active action of the stirring and conveying components and the driving components, the heat energy of the preheated water source entering the fixed sleeve is fully released and evenly dispersed, further reducing the overall temperature difference of the replenishment water source. The drive motor drives the fixed pipe to rotate at high speed through synchronous belt transmission, which in turn drives the conveying blades and stirring blocks on the fixed pipe to rotate synchronously. While conveying the water flow from the bottom of the fixed sleeve upward, it also exchanges heat with the high-temperature preheated water returning into the fixed sleeve and the new cold water delivered by the water pump. This allows the residual heat carried by the returning hot water to be quickly and evenly transferred to the new cold water. This not only further reduces the temperature fluctuation of the replenishment water entering the storage jacket, but also avoids unnecessary heat loss.

[0015] Furthermore, intelligent and proactive regulation of the thermal circulation process is achieved through a dynamic thermal balance component. It can automatically switch the water supply method based on the real-time temperature and water volume inside the storage jacket, ensuring that the dynamic balance of water heating inside the storage jacket is not affected by temperature fluctuations, thus achieving a surround-type thermal circulation effect. The main temperature sensor monitors the water temperature inside the storage jacket in real time, while the secondary temperature sensor simultaneously monitors the preheated water temperature in the return pipe. The two sensors work together to control the flow direction of the electric three-way valve. When the temperature inside the storage jacket is too high, the electric three-way valve closes the guide pipe passage, allowing all the return hot water to enter the fixed jacket for heat exchange with the cold water, dispersing excess heat energy into a large amount of cold water for buffering and preventing the storage jacket from overheating. When the water volume inside the storage jacket is insufficient and rapid replenishment is needed, the electric three-way valve closes the passage to the fixed jacket, allowing the fully preheated return hot water to directly flow into the main supply pipe through the guide pipe and into the storage jacket, achieving instantaneous replenishment of the preheated water source. This dynamic control mechanism enables the entire thermal circulation system to adapt to different workloads, always maintaining a stable water temperature and volume inside the storage jacket. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional cross-sectional view of the boiler drum of the present invention; Figure 3 This is a three-dimensional schematic diagram of the dynamic thermal balance component of the present invention; Figure 4This is a three-dimensional schematic diagram of the spiral tube of the present invention; Figure 5 This is a three-dimensional cross-sectional schematic diagram of the mixing and conveying component of the present invention; Figure 6 This is a three-dimensional exploded perspective view of the heating assembly of the present invention. In the figure: 1. Boiler drum; 2. Auxiliary furnace drum; 3. Water supply assembly; 31. Water pump; 32. Inlet pipe; 33. Baffle plate; 4. Heating assembly; 41. Heating tube; 42. Water storage jacket; 43. Liquid outlet pipe; 44. Spiral tube; 5. Thermal energy circulation preheating assembly; 51. Fixing sleeve; 52. Fixing pipe; 53. Stirring and conveying component; 531. Conveying blade; 532. Stirring block; 54. Driving component; 541. Drive motor; 542. Driving wheel; 543. Driven wheel; 55. Main feed pipe; 56. Secondary feed pipe; 57. Return pipe; 58. Dynamic thermal balance component; 581. Main temperature sensor; 582. Secondary temperature sensor; 583. Electric three-way valve; 584. Guide pipe; 6. Drain pipe; 7. Pressure relief valve; 8. Pressure relief pipe. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] like Figures 1 to 6 As shown, the present invention provides a surround-type heat circulation coffee machine boiler, including a boiler drum 1, an auxiliary boiler drum 2 connected to the right side of the boiler drum 1, and further including... Water supply component 3 is installed inside the boiler drum 1 and is used to supply water to the auxiliary boiler drum 2. Heating component 4 is located inside the auxiliary furnace cylinder 2 and is used to heat the water used for brewing coffee to a specified temperature; The thermal energy circulation preheating component 5 is installed inside the boiler drum 1. It is used to supplement the water source in the heating component 4 and preheat the water source in the water supply component 3, so as to reduce the temperature difference between the supplemented water source and the original hot water for making coffee, and avoid the problem of drastic temperature fluctuation.

[0019] Specifically, the water supply component 3, the heating component 4, and the thermal energy circulation preheating component 5 together constitute a tiered water supply path with a surrounding thermal circulation. From water source input and tiered heating to intelligent regulation, an integrated operating system is formed. The operation and control of all drive motors 541, water pumps 31, temperature sensors, and various valves involved in this invention are uniformly executed by the control circuit board conventionally configured in coffee machines, without the need for additional complex control units.

[0020] like Figures 2 to 4 As shown, the water supply assembly 3 includes a water pump 31, the input end of which is connected to a water inlet pipe 32, and a partition 33 is connected inside the boiler drum 1. The water inlet pipe 32 passes through the partition 33 and extends to the bottom of the partition 33.

[0021] Specifically, the partition 33 divides the interior of the boiler drum 1 into two independent cavities, upper and lower. The lower cavity serves as a primary water storage chamber connected to the external tap water pipe, which can store a certain amount of cold water to ensure a stable and continuous water supply for the coffee machine during continuous extraction, avoiding the impact of water pressure fluctuations on water supply stability. The water inlet pipe 32 extends into the bottom of the water storage chamber, and the water pump 31 serves as the power source for the entire thermal circulation system, pressurizing and transporting the cold water in the water storage chamber to the fixed pipe 52 of the thermal energy circulation preheating component 5, providing basic power for subsequent staged preheating and heat exchange.

[0022] like Figures 2 to 6 As shown, the heating assembly 4 includes a heating tube 41, which is fixedly installed on the auxiliary furnace cylinder 2. A water storage jacket 42 is fixedly installed on the top of the inner wall of the auxiliary furnace cylinder 2. The heating tube 41 is located inside the water storage jacket 42. The surface of the water storage jacket 42 is connected to a liquid outlet pipe 43 through a valve. A spiral tube 44 is provided inside the water storage jacket 42, and the bottom end of the spiral tube 44 extends to the bottom of the water storage jacket 42.

[0023] Specifically, the water jacket 42 serves as the final heating and water storage container, storing high-temperature hot water for coffee extraction. The heating tube 41 is located at the center of the water jacket 42, which can uniformly heat the water inside the water jacket 42. The outlet tube 43 is connected to the extraction head of the coffee machine, and outputs high-temperature hot water under the control of the valve to complete the coffee extraction. The valve is an electric valve. The spiral tube 44 is arranged in the annular space between the inner wall of the water jacket 42 and the heating tube 41. One end of the spiral tube 44 is connected to the fixed tube 52 through the secondary delivery tube 56, and the other end is connected to the fixed sleeve 51 through the return tube 57. The water flows around the inner wall of the water jacket 42 in the spiral tube 44, which can fully absorb the residual heat released by the water jacket 42 and the heating tube 41 to complete the first stage of preheating, while carrying away the excess heat of the water jacket 42, reducing the thermal inertia of the system, and shortening the start-up preheating time.

[0024] like Figures 2 to 5As shown, the thermal energy circulation preheating component 5 includes a fixed sleeve 51, which is fixedly installed on the top of the inner wall of the boiler drum 1. A fixed pipe 52 is rotatably connected inside the fixed sleeve 51. Inside the fixed sleeve 51, a stirring and conveying component 53 stirs the preheated water source inside the water storage jacket 42 to fully exchange heat with the unpreheated water source. The top of the fixed pipe 52 is driven by a driving component 54 to actively run. A main delivery pipe 55 is connected to the fixed sleeve 51. The main delivery pipe 55 is connected to the water storage jacket 42. The surfaces are connected. The bottom end of the fixed pipe 52 extends to the bottom of the fixed sleeve 51 and is connected to the output end of the water pump 31 through a rotary joint. The top end of the fixed pipe 52 is connected to the secondary feed pipe 56 through a rotary joint. The end of the secondary feed pipe 56 away from the fixed pipe 52 is connected to the spiral pipe 44. The end of the spiral pipe 44 away from the secondary feed pipe 56 is connected to the return pipe 57. The water storage sleeve 42 is equipped with a dynamic thermal balance component 58 to detect and balance the temperature of the water source heated by the heating pipe 41 inside the water storage sleeve 42.

[0025] Specifically, the fixed sleeve 51 serves as a secondary heat exchange container, providing a sealed space for mixing hot and cold water; the fixed pipe 52 has both water conveyance and transmission functions, with its bottom connected to the water pump 31 via a rotary joint, allowing it to continuously receive cold water from the pump 31 while rotating, and exchange heat with the preheated water in the fixed sleeve 51 through the fixed pipe 52; its top is connected to the secondary delivery pipe 56 via a rotary joint, delivering warm water to the spiral pipe 44 for primary preheating; the main delivery pipe 55 delivers the warm water that has undergone secondary heat exchange in the fixed sleeve 51 to the water storage jacket 42 for final heating; thus realizing the recovery and utilization of waste heat and the staged preheating of supplementary water sources; during this process, the driving component 54 drives the stirring and conveying. The component 53 stirs the preheated hot water in the fixed sleeve 51, so that it can exchange heat evenly with the surface of the fixed pipe 52 and disperse the heat. The dynamic heat balance component 58 is connected to the water storage sleeve 42, the return pipe 57 and the main supply pipe 55 respectively, and transmits the real-time temperature signal to the control circuit board. The control circuit board automatically adjusts the water flow path of the electric three-way valve 583 according to the preset logic, so as to realize the dynamic regulation of dispersing and buffering when there is excess heat and rapid replenishment when there is insufficient water. It works in synergy with the heating pipe 41 of the heating component 4 and the water pump 31 of the water supply component 3 to always maintain the dynamic balance of water temperature and water volume inside the water storage sleeve 42, and finally achieve a highly efficient and stable surrounding heat circulation effect.

[0026] like Figures 2 to 5 As shown, the stirring and conveying component 53 includes a conveying blade 531, which is connected to the fixed pipe 52. The surface of the conveying blade 531 is in clearance fit with the inner wall of the fixed sleeve 51, and a stirring block 532 is connected to the conveying blade 531.

[0027] Specifically, the conveying blade 531 and the stirring block 532 rotate synchronously with the fixed pipe 52. The conveying blade 531 uses a spiral propulsion to transport the water flow at the bottom of the fixed sleeve 51 upwards. The interior of the conveying blade 531 is hollow, which allows the cold water inside the fixed pipe 52 to be distributed and filled, and then exchange heat with the hot water, providing auxiliary power for the water flow into the main delivery pipe 55. At the same time, the stirring block 532 generates a strong disturbance to the water in the fixed sleeve 51 during rotation, and fully exchanges heat between the high-temperature preheated water entering from the return pipe 57 and the outer wall of the fixed pipe 52. This allows the residual heat carried by the return hot water to be quickly and evenly transferred to every drop of newly entered cold water, greatly improving the heat exchange efficiency, further reducing the temperature difference of the replenishment water entering the water storage jacket 42, and ensuring a high degree of water temperature stability.

[0028] like Figures 1 to 2 As shown, the drive component 54 includes a drive motor 541, which is fixedly installed on the inner wall of the boiler drum 1. The output section of the drive motor 541 is connected to a drive wheel 542, and the surface of the fixed tube 52 is connected to a driven wheel 543. The drive wheel 542 is connected to the driven wheel 543 via a synchronous belt.

[0029] Specifically, the drive motor 541 provides rotational power to the stirring and conveying component 53, and transmits the power to the fixed tube 52 through a synchronous belt drive. The speed of the drive motor 541 can be adjusted by the control circuit board according to the system operating status. During continuous extraction, the speed is increased to enhance the stirring and conveying effect, and the speed is reduced in standby mode to save energy, thus realizing intelligent control of power output.

[0030] like Figures 2 to 5 As shown, the dynamic thermal balance component 58 includes a main temperature sensor 581, which is fixedly installed on the surface of the water storage sleeve 42. A secondary temperature sensor 582 is fixedly installed on the return pipe 57. An electric three-way valve 583 is connected to the return pipe 57. The left end of the electric three-way valve 583 is connected to the surface of the fixed sleeve 51. The top end of the electric three-way valve 583 is connected to a guide pipe 584, which is connected to the surface of the main delivery pipe 55.

[0031] Specifically, the main temperature sensor 581 and the secondary temperature sensor 582 transmit the detected temperature signals to the control circuit board in real time. The control circuit board automatically controls the flow direction of the electric three-way valve 583 according to a preset threshold. When the internal temperature of the water storage jacket 42 is too high, the electric three-way valve 583 closes the passage of the guide pipe 584, allowing all the return hot water to enter the fixed sleeve 51 for heat exchange with the cold water. This disperses excess heat energy into a large amount of cold water for buffering, preventing the water storage jacket 42 from overheating and causing excessive coffee extraction, while also realizing the recovery and utilization of waste heat. A water level sensor is also fixedly installed on the fixed sleeve 51 to detect the water level in the water storage jacket. Regarding the water level of the internal water source 42, when the water level sensor detects that the water volume inside the water storage jacket 42 is insufficient and needs to be replenished quickly, the electric three-way valve 583 closes the passage to the fixed sleeve 51, allowing the fully preheated return hot water to directly flow into the main supply pipe 55 through the guide pipe 584 and enter the water storage jacket 42, realizing instantaneous replenishment of the preheated hot water source and avoiding a drop in water temperature due to untimely water replenishment; this dynamic control mechanism enables the dynamic balance of water temperature and water volume inside the water storage jacket 42, which can adapt to different working loads and always maintain the stability of water temperature and water volume inside the water storage jacket 42, ultimately achieving a surround heat circulation effect.

[0032] like Figures 2 to 3 As shown, the bottom of the fixed sleeve 51 is connected to the drain pipe 6, which is controlled to open / close by a valve.

[0033] Specifically, the drain pipe 6 serves as a maintenance and safety channel for the system. During the initial startup of the machine or after a long period of standby, the valve on the drain pipe 6 can be opened to drain the low-temperature stagnant water accumulated in the fixed sleeve 51.

[0034] like Figure 3 As shown, a pressure relief valve 7 is connected to the water storage jacket 42, and a pressure relief pipe 8 is connected to the other end of the pressure relief valve 7. This is used to discharge the high-temperature steam generated inside the water storage jacket 42 due to heating under pressure, so as to avoid damage to the inside of the water storage jacket 42 due to excessive pressure.

[0035] Specifically, the pressure relief valve 7 is a mechanical automatic pressure relief device. When the pressure inside the water storage jacket 42 exceeds the preset safety value due to the high-temperature steam generated by heating, the pressure relief valve 7 automatically opens, discharging the excess high-temperature steam to the outside of the coffee machine through the pressure relief pipe 8. It automatically closes after the internal pressure returns to the safe range. This structure can effectively prevent the water storage jacket 42 from deforming or rupturing due to excessive internal pressure, and at the same time avoids the problem of unstable water output from the liquid outlet pipe 43 due to excessive pressure.

[0036] The working process of the technical solution provided by this invention is as follows: After power-on, the control circuit board starts the water pump 31 and heating element 41, while the drive motor 541 drives the driven wheel 543 and fixed pipe 52 to rotate synchronously via the drive wheel 542 and synchronous belt. The water pump 31 pressurizes and delivers cold water from the lower water storage chamber of the boiler drum 1 to the inside of the fixed pipe 52 through the inlet pipe 32. The cold water flows upward along the fixed pipe 52, enters the secondary delivery pipe 56 through the top rotary joint, and then is introduced into the spiral tube 44 inside the water storage jacket 42. The cold water flows from top to bottom along the inner wall of the water storage jacket 42 in the spiral tube 44, fully absorbing the residual heat released by the water in the heating element 41 and the water storage jacket 42 to complete one The water is preheated and then flows out through the return pipe 57. The returned water enters the bottom of the fixed sleeve 51 through the electric three-way valve 583. The conveying blades 531, which rotate synchronously with the fixed pipe 52, propel the water upward through the spiral propulsion. At the same time, the stirring block 532 generates strong disturbance to the water, forcing the high-temperature water to fully exchange heat with the cold water in the fixed pipe 52 and the conveying blades 531, thus completing the secondary heat exchange. The water after uniform heat exchange is transported to the water storage jacket 42 through the main delivery pipe 55, and is finally heated to the extraction temperature of 90-96℃ by the central heating pipe 41, thus completing the first circular heat cycle. When coffee is continuously extracted, the valve on the outlet pipe 43 opens, and the high-temperature hot water in the water storage jacket 42 is output to the extraction head. At the same time, the water level sensor detects that the water level in the water storage jacket 42 has dropped, and the control circuit board adjusts the flow direction of the electric three-way valve 583 so that the preheated water flowing back directly flows into the main supply pipe 55 through the guide pipe 584, quickly replenishing the preheated water source to the water storage jacket 42 and avoiding a sudden drop in water temperature caused by direct injection of cold water. When the main temperature sensor 581 detects that the temperature of the water storage jacket 42 exceeds the set threshold, the electric three-way valve 583 closes the passage of the guide pipe 584, and the hot water flowing back enters the fixed sleeve 51 again to exchange heat with the cold water, dispersing the excess heat energy. At the same time, the heating tube 41 stops heating and restarts after the temperature returns to normal. During operation, when the internal pressure of the water storage jacket 42 exceeds the safety value, the pressure relief valve 7 automatically opens and discharges the excess high-temperature steam through the pressure relief pipe 8; all the operation actions of the entire system are uniformly regulated by the control circuit board according to the temperature and water level signals to achieve dynamic stability of water temperature and water volume during continuous extraction.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A surround-type heat circulation coffee machine boiler, comprising a boiler drum (1), wherein a secondary boiler drum (2) is connected to the right side of the boiler drum (1), characterized in that, Also includes Water supply assembly (3), which is installed inside the boiler drum (1) and is used to supply water to the auxiliary boiler drum (2); Heating component (4), which is located inside the auxiliary furnace cylinder (2), is used to heat the water used for brewing coffee to a specified temperature; The thermal energy circulation preheating component (5) is installed inside the boiler drum (1) to supplement the water source in the heating component (4) and to preheat the water source in the water supply component (3) so that the temperature difference between the supplemented water source and the original hot water for making coffee is reduced, thus avoiding the problem of drastic temperature fluctuations.

2. The surround-type heat circulation coffee machine boiler according to claim 1, characterized in that: The water supply assembly (3) includes a water pump (31), the input end of which is connected to a water inlet pipe (32), and the interior of the boiler drum (1) is connected to a partition (33). The water inlet pipe (32) extends through the partition (33) to the bottom of the partition (33).

3. The surround-type heat circulation coffee machine boiler according to claim 1, characterized in that: The heating assembly (4) includes a heating tube (41), which is fixedly installed on the auxiliary furnace cylinder (2). A water storage sleeve (42) is fixedly installed on the top of the inner wall of the auxiliary furnace cylinder (2). The heating tube (41) is located inside the water storage sleeve (42). The surface of the water storage sleeve (42) is connected to a liquid outlet pipe (43) through a valve. A spiral tube (44) is provided inside the water storage sleeve (42). The bottom end of the spiral tube (44) extends to the bottom of the water storage sleeve (42).

4. The surround-type heat circulation coffee machine boiler according to claim 3, characterized in that: The thermal energy circulation preheating component (5) includes a fixed sleeve (51), which is fixedly installed on the top of the inner wall of the boiler drum (1). A fixed pipe (52) is rotatably connected inside the fixed sleeve (51). The fixed sleeve (51) uses a stirring and conveying component (53) to stir the preheated water in the water storage jacket (42) and fully exchange heat with the unheated water. The top of the fixed pipe (52) is driven by a driving component (54) to actively run. A main delivery pipe (55) is connected to the fixed sleeve (51). The main delivery pipe (55) is connected to the water storage jacket (42). The surfaces of the fixed tube (52) are connected. The bottom end of the fixed tube (52) extends to the bottom of the fixed sleeve (51) and is connected to the output end of the water pump (31) through a rotary joint. The top end of the fixed tube (52) is connected to the secondary delivery tube (56) through a rotary joint. The end of the secondary delivery tube (56) away from the fixed tube (52) is connected to the spiral tube (44). The end of the spiral tube (44) away from the secondary delivery tube (56) is connected to the return pipe (57). The water storage sleeve (42) is equipped with a dynamic heat balance component (58) to detect and balance the temperature of the water source heated by the heating tube (41) inside the water storage sleeve (42).

5. The surround-type heat circulation coffee machine boiler according to claim 4, characterized in that: The stirring and conveying component (53) includes a conveying blade (531), which is connected to a fixed pipe (52). The surface of the conveying blade (531) is in clearance fit with the inner wall of the fixed sleeve (51), and a stirring block (532) is connected to the conveying blade (531).

6. The surround-type heat circulation coffee machine boiler according to claim 4, characterized in that: The driving component (54) includes a drive motor (541), which is fixedly installed on the inner wall of the boiler drum (1). The output section of the drive motor (541) is connected to a drive wheel (542), and the surface of the fixed pipe (52) is connected to a driven wheel (543). The drive wheel (542) is connected to the driven wheel (543) via a synchronous belt.

7. The surround-type heat circulation coffee machine boiler according to claim 4, characterized in that: The dynamic thermal balance component (58) includes a main temperature sensor (581), which is fixedly installed on the surface of the water storage jacket (42). A secondary temperature sensor (582) is fixedly installed on the return pipe (57). An electric three-way valve (583) is connected to the return pipe (57). The left end of the electric three-way valve (583) is connected to the surface of the fixed sleeve (51). The top end of the electric three-way valve (583) is connected to a guide pipe (584), which is connected to the surface of the main delivery pipe (55).

8. The surround-type heat circulation coffee machine boiler according to claim 4, characterized in that: The bottom of the fixed sleeve (51) is connected to a drain pipe (6), which is controlled to open / close by a valve.

9. A surround-type heat circulation coffee machine boiler according to claim 3, characterized in that: The water storage jacket (42) is connected to a pressure relief valve (7), and the other end of the pressure relief valve (7) is connected to a pressure relief pipe (8).

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