Water cooling device of full-automatic coffee machine

Abstract

The utility model provides a cold water device of full-automatic coffee machine, including water storage body, evaporation piece, liquid inlet pipe and return air pipe, water storage body includes suitable for providing cooling drinking water and the space of storing drinking water and detachable bottom water storage cavity sealed first cover body, the evaporation piece includes the spout that is formed by protruding outward in the one-piece formation, and the liquid inlet pipe and return air pipe are connected with the first cover body. The evaporation part is in butt joint fit with part of the outer surface of the water storage body, the flow groove and the outer surface of the water storage body define an evaporation flow channel for guiding refrigerant to flow and evaporate in a one-way mode, the liquid inlet pipe is suitable for guiding liquid refrigerant into the evaporation flow channel, and the air return pipe is suitable for guiding gaseous refrigerant out of the evaporation flow channel. The evaporation part and part of the outer surface of the water storage body are in butt joint and matched to form the evaporation flow channel for flowing evaporation of refrigerants, drinking water does not make direct contact with the evaporation part, incrustation deposition is avoided, water storage space is not occupied, and the heat exchange area is large.

Description

Technical Field

[0001] The utility model belongs to the technical field of coffee machines, and in particular relates to a cold water device of a full-automatic coffee machine. Background Art

[0002] Low-temperature high-pressure water extraction is a coffee making technology for a fully automatic coffee machine using a cold water device. It uses cold water or water close to freezing point to extract coffee powder under high pressure to extract the flavor of the coffee. This method is different from traditional hot water brewing. Low temperature helps to extract certain flavor compounds in coffee without over-extracting bitter substances, thereby producing a unique taste and flavor. Therefore, a fully automatic coffee machine needs to be equipped with a cold water device to provide low-temperature (5℃-8℃) high-pressure water. The cold water device includes an inner tank and a common refrigeration system placed in the inner tank, namely a stainless steel coil and a refrigerant evaporated in the stainless steel coil. After the normal temperature water enters the inner tank, it is cooled down to cold water by the refrigeration system. The cold water is pressurized to 19bar by a pressure pump and extracted into the fully automatic coffee machine. Although installing the stainless steel coil directly in the inner cavity allows room temperature water to directly contact the stainless steel coil, there are also the following limitations: (1) There is a certain contradiction between the heat transfer area of ​​the stainless steel coil and the water storage space. The expansion of the heat transfer area means the reduction of the water storage space. (2) The gaps or angles of the stainless steel coil itself and the gaps between the stainless steel coil and the inner tank are difficult to clean, affecting the health of food. (3) After long-term use, scale will accumulate on the surface of the stainless steel coil, which is difficult to clean, resulting in a decrease in the refrigeration capacity of the refrigeration system. Utility Model Content

[0003] In view of the above-mentioned defects of the prior art, the purpose of the present invention is to provide a cold water device for a fully automatic coffee machine to meet the needs of users.

[0004] To achieve the above object, the utility model provides a cold water device for a fully automatic coffee machine, comprising:

[0005] The water storage body comprises a water storage chamber suitable for providing a space for cooling and storing drinking water and a first cover body detachably sealing the bottom of the water storage chamber.

[0006] a water inlet pipe, which is suitable for introducing drinking water into the water storage chamber,

[0007] The water outlet pipe is suitable for introducing the cooled drinking water into the booster pump,

[0008] a drain pipe adapted to discharge drinking water out of the water storage chamber,

[0009] The evaporator comprises a flow groove formed by an integral molding and protruding outward, the evaporator is butted with a part of the outer surface of the water storage body, the flow groove and the outer surface of the water storage body enclose an evaporation flow channel for guiding the unidirectional flow evaporation of the refrigerant,

[0010] a liquid inlet pipe, which is suitable for introducing liquid refrigerant into the evaporation flow channel,

[0011] The return air pipe is suitable for leading the gaseous refrigerant out of the evaporation flow channel, and comprises a capillary structure. The high-pressure gaseous refrigerant is suitable for reducing the pressure after passing through the capillary structure.

[0012] Preferably, the flow groove is a spiral flow groove that spirally rises along the central axis of the evaporator, which can provide a continuous flow path and help the uniform evaporation of the refrigerant. Alternatively, the flow groove is a U-shaped flow groove including a plurality of rotating units, which can provide a larger direct contact area between the refrigerant and the water storage body, and help improve the heat exchange efficiency. Alternatively, the flow groove is an S-shaped flow groove.

[0013] Preferably, the cross-section of the flow channel is semicircular or rounded rectangular. Such a structure enables the refrigerant to fully contact the surface of the water storage body, thereby improving the heat exchange efficiency. At the same time, the structure is smooth and stable, with good pressure bearing capacity, which can alleviate the stress concentration problem and is more suitable for high-pressure environments caused by refrigerant evaporation.

[0014] Preferably, the evaporator comprises a partition between adjacent flow channels, the partition is arranged close to the water storage body and a plurality of welding fixing areas are optionally arranged between the two. This design can enhance the connection strength between the evaporator and the water storage body and avoid overflow of the refrigerant between adjacent flow channels.

[0015] Preferably, the width of the flow channel is defined as a first width, the width of the partition is defined as a second width, and the ratio of the first width to the second width is between 0.8 and 1.5.

[0016] Preferably, the water storage chamber comprises a top plate and a bottom plate arranged in parallel and an annular side wall arranged therebetween; the cross-section of the water storage chamber is circular, elliptical or runway-shaped; the annular side wall has a smooth inner surface; the evaporator is sleeved on the outer surface of the annular side wall; the structure is compact and easier to integrate into a fully automatic coffee machine; the heat exchange area is evenly increased, the temperature difference of the drinking water in the water storage chamber is reduced, and a more uniform cooling effect is achieved; the first cover body is suitable for constituting the top plate of the water storage chamber; the drain pipe is connected to the bottom plate so that the drinking water can be completely discharged.

[0017] Preferably, the axial dimension of the annular side wall is defined as a first height, the axial dimension of the evaporating element is defined as a second height, and the ratio of the second height to the first height is in a range of 0.5 to 0.8.

[0018] As a preferred embodiment: the evaporator comprises a first mounting seat and a second mounting seat which are formed by bulging outward in the same direction as the flow channel, the flow channel is a spiral flow channel having a plurality of unit spiral flow channels, the first mounting seat is suitable for simultaneously connecting two adjacent unit spiral flow channels at the starting end, the liquid inlet pipe is welded to the first mounting seat, the first mounting seat is suitable for simultaneously connecting two adjacent unit spiral flow channels at the ending end, and the return air pipe is welded to the second mounting seat. This design helps to balance the fluid pressure in the flow channel, avoid the formation of dead zones or stagnation zones in the flow channel, and avoid excessive local pressure at the first mounting seat and the second mounting seat.

[0019] As a preferred embodiment: it also includes an insulation body, which includes an insulation cavity suitable for accommodating the water storage body and a second cover body suitable for closing the insulation cavity, the second cover body is suitable for constituting the upper surface of the insulation body, the evaporation component is suitable for abutting against the inner wall of the insulation cavity, the water storage body and the evaporation component are both made of stainless steel, and the insulation body is at least partially made of polystyrene foam material.

[0020] Preferably, the first cover body includes a first cover plate and a first peripheral edge extending downward around the first cover plate, the annular side wall extends inward to form an annular platform, the annular platform is suitable for supporting the first peripheral edge, the first cover plate is flush with the upper surface of the annular side wall, the center of the first cover plate is recessed downward to form a gripping area, and a handle is provided in the gripping area which is not higher than the first cover plate.

[0021] Preferably, the second cover body includes a second cover plate and a second peripheral edge extending downward around the second cover plate, the upper surface of the first cover plate and the annular side wall are suitable for supporting the second cover plate, and the second peripheral edge is suitable for being inserted into the gap between the annular side wall and the insulation chamber.

[0022] The beneficial effects of the utility model are:

[0023] By docking the evaporator with part of the outer surface of the water storage body to form an evaporation flow channel for the refrigerant to flow and evaporate, drinking water does not come into direct contact with the evaporator, thus avoiding scale deposition and occupying water storage space. The heat exchange area is large, and the interior of the water storage chamber is hollow and regular, which is convenient for cleaning and disinfection. Furthermore, this design can more easily integrate temperature sensors and control elements, etc., and achieve precise temperature control by controlling the flow rate of the refrigerant. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The utility model is a schematic structural diagram of a cold water device of a fully automatic coffee machine.

[0025] Figure 2 The utility model is a schematic diagram of an explosion of a cold water device of a fully automatic coffee machine.

[0026] Figure 3 The utility model is a cross-sectional schematic diagram of a cold water device of a fully automatic coffee machine.

[0027] In the figure, a water storage body 101, a water inlet pipe 102, a water outlet pipe 103, a drain pipe 104, an evaporation element 105, a liquid inlet pipe 106, an air return pipe 107, a heat preservation body 108, an evaporation flow channel 109, a water storage chamber 110, a first cover body 111, an annular side wall 112, a heat preservation chamber 113, a second cover body 114, a flow groove 115, a partition 116, a first mounting seat 117, a second mounting seat 118, an annular platform 119, a first cover plate 120, a first peripheral edge 121, a handle 122, a second cover plate 123, and a second peripheral edge 124. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0030] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0031] like Figure 1-3The cold water device of a fully automatic coffee machine comprises a water storage body 101, a water inlet pipe 102, a water outlet pipe 103, a drain pipe 104, an evaporation element 105, a liquid inlet pipe 106, an air return pipe 107 and a heat preservation body 108. The water storage body 101 comprises a water storage chamber 110 suitable for providing a space for cooling and storing drinking water and a first cover body 111 detachably sealing the bottom of the water storage chamber 110. The water storage chamber 110 comprises a top plate and a bottom plate arranged in parallel and an annular side wall 112 arranged therebetween. The first cover body 111 is suitable for constituting the top plate of the water storage chamber 110. The cross section of the water storage chamber 110 is in the shape of a racetrack, and the annular side wall 112 has a smooth inner surface. The water inlet pipe 102 is suitable for introducing drinking water into the water storage chamber 110, the water outlet pipe 103 is suitable for introducing the cooled drinking water into the pressure pump, and the drain pipe 104 is connected to the bottom plate so that the drinking water can be completely discharged. The heat preservation body 108 includes a heat preservation chamber 113 suitable for accommodating the water storage body 101 and a second cover body 114 suitable for sealing the heat preservation chamber 113. The evaporation member 105 includes a flow groove 115 formed by an integral molding and bulging outward. The evaporation member 105 is sleeved on the outer surface of the annular side wall 112 and docked. The flow groove 115 and the outer surface of the annular side wall 112 are enclosed to form an evaporation channel 109 that guides the refrigerant to evaporate in one direction. The structure is compact and easier to integrate into a fully automatic coffee machine, uniformly increasing the heat exchange area, reducing the temperature difference of the drinking water in the water storage chamber 110, and achieving a more uniform cooling effect. The liquid inlet pipe 106 is suitable for introducing liquid refrigerant into the evaporation channel 109, and the return pipe 107 is suitable for leading the gaseous refrigerant out of the evaporation channel 109, including a capillary structure, and the high-pressure gaseous refrigerant is suitable for reducing the pressure after passing through the capillary structure.

[0032] In this embodiment, the flow groove 115 is a spiral flow groove 115 that spirally rises along the central axis of the evaporation element 105, which can provide a continuous flow path and help the uniform evaporation of the refrigerant. The cross-section of the flow channel is semicircular. This structure allows the refrigerant to fully contact the surface of the water storage body 101, thereby improving the heat exchange efficiency. At the same time, the structure is smooth and stable, with good pressure bearing capacity, which can alleviate the stress concentration problem and is more suitable for high-pressure environments caused by refrigerant evaporation. The axial dimension of the annular side wall 112 is defined as the first height, and the axial dimension of the evaporation element 105 is defined as the second height. The ratio of the second height to the first height is 0.6. The evaporation element 105 includes a partition 116 located between adjacent flow grooves 115. The partition 116 is arranged close to the annular side wall 112 and a number of welding fixing areas can be optionally arranged between the two. This design can enhance the connection strength between the evaporation element 105 and the water storage body 101 and avoid overflow of the refrigerant between adjacent flow channels. The width of the flow channel 115 is defined as a first width, and the width of the partition 116 is defined as a second width, and the first width is equal to the second width.

[0033] In this embodiment, the evaporator 105 includes a first mounting seat 117 and a second mounting seat 118 that are formed by bulging outward in the same direction as the flow channel 115. The flow channel is a spiral flow channel with a plurality of unit spiral flow channels. The first mounting seat 117 is suitable for simultaneously connecting two adjacent unit spiral flow channels located at the starting end. The liquid inlet pipe 106 is welded to the first mounting seat 117. The first mounting seat 117 is suitable for simultaneously connecting two adjacent unit spiral flow channels located at the terminating end. The return pipe 107 is welded to the second mounting seat 118. This design helps to balance the fluid pressure in the flow channel, avoid the formation of dead zones or stagnation zones in the flow channel, and avoid excessive local pressure at the first mounting seat 117 and the second mounting seat 118.

[0034] In this embodiment, the water storage body 101 and the evaporation element 105 are made of stainless steel, and the heat preservation body 108 is made of polystyrene foam material. The first cover body 111 includes a first cover plate 120 and a first peripheral edge 121 extending downwardly around the first cover plate 120, and the annular side wall 112 extends inward to form an annular platform 119, and the annular platform 119 is suitable for supporting the first peripheral edge 121. The first cover plate 120 is flush with the upper surface of the annular side wall 112, and the center of the first cover plate 120 is concave downward to form a gripping area, and a handle 122 is provided in the gripping area that is not higher than the first cover plate 120. The second cover body 114 is suitable for constituting the upper surface of the heat preservation body 108, and the evaporation element 105 is suitable for abutting the inner wall of the heat preservation chamber 113. The second cover body 114 includes a second cover plate 123 and a second peripheral edge 124 extending downward around the second cover plate 123. The upper surface of the first cover plate 120 and the annular side wall 112 are suitable for supporting the second cover plate 123, and the second peripheral edge 124 is suitable for being inserted into the gap between the annular side wall 112 and the insulation chamber 113.

[0035] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model.

Claims

1. A cold water device for a fully automatic coffee machine, characterized in that: include The water storage body comprises a water storage chamber suitable for providing a space for cooling and storing drinking water and a first cover body detachably sealing the bottom of the water storage chamber. a water inlet pipe, which is suitable for introducing drinking water into the water storage chamber, The water outlet pipe is suitable for introducing the cooled drinking water into the booster pump, a drain pipe adapted to discharge drinking water out of the water storage chamber, The evaporator comprises a flow groove formed by an integral molding and protruding outward, the evaporator is butted with a part of the outer surface of the water storage body, the flow groove and the outer surface of the water storage body enclose an evaporation flow channel for guiding the refrigerant to evaporate in a unidirectional flow direction, a liquid inlet pipe, which is suitable for introducing liquid refrigerant into the evaporation flow channel, The gas return pipe is suitable for leading the gaseous refrigerant out of the evaporation flow channel.

2. The cold water device of a fully automatic coffee machine according to claim 1, characterized in that: The flow channel is a spiral flow channel that spirally rises along the central axis of the evaporator, or the flow channel is a U-shaped flow channel including a plurality of rotation units, or the flow channel is an S-shaped flow channel.

3. The cold water device of a fully automatic coffee machine according to claim 2, characterized in that: The cross section of the flow channel is semicircular or rounded rectangular.

4. The cold water device of a fully automatic coffee machine according to claim 3, characterized in that: The evaporation element comprises a partition plate located between adjacent flow channels, the partition plate is arranged closely to the water storage body and a plurality of welding fixing areas are optionally arranged between the two.

5. The cold water device of a fully automatic coffee machine according to claim 4, characterized in that: The width of the flow channel is defined as a first width, the width of the partition is defined as a second width, and the ratio of the first width to the second width is between 0.8 and 1.

5.

6. A cold water device for a fully automatic coffee machine according to any one of claims 2 to 5, characterized in that: The water storage chamber comprises a top plate and a bottom plate arranged in parallel and an annular side wall arranged therebetween. The cross section of the water storage chamber is circular, elliptical or racetrack-shaped. The annular side wall has a smooth inner surface. The evaporating element is sleeved on the outer surface of the annular side wall. The first cover body is suitable for constituting the top plate of the water storage chamber. The drain pipe is connected to the bottom plate so that drinking water can be completely discharged.

7. The cold water device of a fully automatic coffee machine according to claim 6, characterized in that: The axial dimension of the annular side wall is defined as a first height, the axial dimension of the evaporation element is defined as a second height, and the ratio of the second height to the first height is in a range of 0.5 to 0.

8.

8. The cold water device of a fully automatic coffee machine according to claim 7, characterized in that: The evaporator comprises a first mounting seat and a second mounting seat which are formed by bulging outward in the same direction as the flow channel, the flow channel is a spiral flow channel having a plurality of unit spiral flow channels, the first mounting seat is suitable for simultaneously connecting two adjacent unit spiral flow channels located at the starting end, the liquid inlet pipe is welded to the first mounting seat, the first mounting seat is suitable for simultaneously connecting two adjacent unit spiral flow channels located at the ending end, and the return air pipe is welded to the second mounting seat.

9. The cold water device of a fully automatic coffee machine according to claim 8, characterized in that: It also includes an insulation body, which includes an insulation cavity suitable for accommodating the water storage body and a second cover body suitable for sealing the insulation cavity, the second cover body is suitable for constituting the upper surface of the insulation body, the evaporation component is suitable for abutting against the inner wall of the insulation cavity, the water storage body and the evaporation component are both made of stainless steel, and the insulation body is at least partially made of polystyrene foam material.

10. The cold water device of a fully automatic coffee machine according to claim 9, characterized in that: The first cover body comprises a first cover plate and a first peripheral edge extending downwardly around the first cover plate, the annular side wall extends inwardly to form an annular platform, the annular platform is suitable for supporting the first peripheral edge, the first cover plate is flush with the upper surface of the annular side wall, the center of the first cover plate is recessed downward to form a gripping area, and a handle is arranged in the gripping area and is not higher than the first cover plate; The second cover body includes a second cover plate and a second peripheral edge extending downward around the second cover plate, the upper surface of the first cover plate and the annular side wall are suitable for supporting the second cover plate, and the second peripheral edge is suitable for inserting into the gap between the annular side wall and the insulation cavity.

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