Valve assembly, pressure pump and coffee machine

Abstract

The utility model provides a valve assembly, a pressure pump and a coffee machine. The valve assembly comprises a valve seat, a valve plate assembly and a valve deck. The valve plate assembly comprises a water inlet check valve and a water outlet check valve; a valve cover water inlet channel and a valve cover water outlet channel are formed in the valve cover; the valve assembly further comprises a water inlet plug, the water inlet plug is detachably installed at the water outlet end of the valve deck water inlet channel, two or more water inlet plug channels are formed in the water inlet plug in the axial direction in a penetrating mode, and the water inlet plug channels are arranged in the circumferential direction of the water inlet plug at intervals. And each water inlet plug channel can be covered by the water outlet check valve. The valve assembly can improve the water outlet pressure so as to improve the coffee extraction effect, and meanwhile, the forming process is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure pumps, in particular to a valve assembly, a pressure pump and a coffee machine. Background Art

[0002] The existing micro water pump is provided with circular motion by the motor, and then the diaphragm inside the pressure pump is reciprocated by mechanical devices, thereby compressing and stretching the air in the pump cavity. Under the action of the one-way valve assembly, positive pressure is formed at the drain port, and vacuum is formed at the water pump port, thereby generating a pressure difference with the external atmospheric pressure. Under the action of the pressure difference, water is pressed into the water inlet and then discharged from the drain port.

[0003] The existing diaphragm usually includes an integrally formed diaphragm portion and a fixed portion. The fixed portion extends along the axial direction of the diaphragm and is fixed to the end of a connecting rod. When the connecting rod reciprocates, it continuously applies a push-pull force to the diaphragm. Under the push-pull force, the position where the diaphragm is connected to the fixed portion is easily torn, thereby affecting the operation of the pressure pump.

[0004] In addition, the existing water inlet and outlet holes are usually directly opened on the valve seat. In order to facilitate the implementation of the process, the sizes of the water inlet and outlet holes are usually opened relatively large, which will cause the internal pressure to decrease. In this way, when brewing coffee, the amount of coffee foam is small and the extraction effect is not good. Utility Model Content

[0005] The first object of the utility model is to provide a valve assembly that increases the water outlet pressure and thus improves the coffee extraction effect, while simplifying the molding process.

[0006] The second object of the utility model is to provide a pressure pump using the valve assembly.

[0007] The second object of the utility model is to provide a coffee machine using the pressure pump.

[0008] To achieve the above-mentioned first purpose, the utility model provides a valve assembly, including a valve seat, a valve plate assembly and a valve cover; a valve seat water inlet channel and a valve seat water outlet channel are provided on the valve seat, and a diaphragm mounting portion is provided on the side of the valve seat away from the valve cover; the valve plate assembly is located between the valve seat and the valve cover, and the valve plate assembly includes a water inlet check valve and a water outlet check valve; a valve cover water inlet channel and a valve cover water outlet channel are provided on the valve cover, the water inlet check valve is arranged between the valve seat water outlet channel and the valve cover water outlet channel, and the water outlet check valve is arranged between the valve seat water inlet channel and the valve cover water inlet channel; the valve assembly also includes a water inlet plug, which is detachably mounted on the water outlet end of the valve cover water inlet channel, and a water inlet plug channel is axially penetrated on the water inlet plug, and the number of the water inlet plug channels is more than two, and the plurality of water inlet plug channels are arranged at intervals along the circumference of the water inlet plug, and each water inlet plug channel can be covered by the water outlet check valve. And / or the valve assembly also includes a water outlet plug, which is detachably mounted on the water inlet end of the valve cover water outlet channel. A water outlet plug channel is axially penetrated through the water outlet plug. The number of water outlet plug channels is more than two. The multiple water outlet plug channels are arranged at intervals along the circumference of the water outlet plug, and each water outlet plug channel can be covered by the water inlet check valve.

[0009] It can be seen from the above scheme that by setting a water inlet plug or a water outlet plug, the valve seat, the valve cover and the water inlet and outlet correspondingly arranged thereon are separated. In this way, a smaller water inlet plug channel and a water outlet plug channel can be set as needed, thereby increasing the water outlet pressure and improving the coffee extraction effect. In addition, by forming the corresponding water inlet and outlet channels on each plug separately, the molding process is simpler due to the simple structure of the plug.

[0010] A preferred solution is that a first mounting groove is formed between the water inlet end of the water outlet channel of the valve cover and the water outlet end of the water outlet channel of the valve seat, and the water outlet plug is arranged in the first mounting groove; the water outlet plug includes a water outlet plug body and a water outlet positioning ring; the water outlet positioning ring protrudes outward from the peripheral wall of the water outlet plug body along the radial direction of the water outlet plug body and extends along the circumferential direction of the water outlet plug body, and the water outlet positioning ring is gap-matched with the peripheral wall of the first mounting groove; each water outlet plug channel is located on the water outlet plug body and extends along the axial direction of the water outlet plug body.

[0011] It can be seen that the water outlet positioning ring of the water outlet plug is used to achieve radial positioning relative to the valve cover to prevent the water outlet plug from shaking in the first installation groove and affecting water outlet.

[0012] A further solution is that a first water inlet groove is provided at one end of the water outlet plug body facing the water outlet channel of the valve seat, the first water inlet groove is recessed inwardly from the first end wall of the water outlet plug body, and the water inlet end of each water outlet plug channel is located in the first water inlet groove; a first water outlet recess is provided at one end of the water outlet plug body facing the water outlet channel of the valve cover, the first water outlet recess is a concave arc surface recessed inwardly from the second end wall of the water outlet plug body, and the water outlet end of each water outlet plug channel is located in the first water outlet recess; the water inlet check valve can cover the first water outlet recess.

[0013] It can be seen that by providing the first water inlet groove and the first water outlet recess on the water outlet plug body, the water outlet plug body and the first mounting groove can be easily matched in the axial direction of the water outlet plug body without affecting the conduction of the water outlet plug channel and the water inlet plug channel.

[0014] A further solution is that the water inlet check valve includes a first valve plate and a first fixing member; the first fixing member includes a first limiting portion and a first fixing portion connected along the axial direction of the first fixing member, and the first valve plate is restricted between the first limiting portion and the first water outlet recess; the diameter of the first limiting portion is larger than the diameter of the first fixing portion and smaller than the diameter of the first valve plate; a first through hole is provided on the first valve plate, and a first positioning hole is provided in the first water outlet recess of the water outlet plug body, and the first fixing portion is fixedly connected to the first positioning hole after passing through the first through hole; the first limiting portion and the first end wall of the water outlet plug body are limitedly matched with the first mounting groove in the axial direction of the water outlet plug body.

[0015] It can be seen that the first fixing member is used to fix the first valve plate on the water outlet plug body, and at the same time, together with the first end wall of the water outlet plug body, cooperates with the inner wall of the first mounting groove in the axial direction to achieve axial limitation. At the same time, the first limiting portion and the first water outlet recess fix the first valve plate, and the water flowing out of the water outlet channel of the valve seat applies a force to the first valve plate, forcing the first valve plate to deform, thereby achieving conduction of the water outlet plug channel.

[0016] A preferred solution is that a second mounting groove is formed between the water outlet end of the water inlet channel of the valve cover and the water inlet end of the water inlet channel of the valve seat, and the water inlet plug is arranged in the second mounting groove; the water inlet plug includes a water inlet plug body and a water inlet positioning ring; the water inlet positioning ring protrudes outward from the peripheral wall of the water inlet plug body along the radial direction of the water inlet plug body and extends along the circumferential direction of the water inlet plug body, and the water inlet positioning ring is gap-matched with the peripheral wall of the second mounting groove; each water inlet plug channel is located on the water inlet plug body and extends along the axial direction of the water inlet plug body.

[0017] It can be seen that the water inlet positioning ring of the water inlet plug is used to achieve radial positioning relative to the valve cover to prevent the water inlet plug from shaking in the second mounting groove and affecting water inlet.

[0018] A further solution is that a second water inlet groove is provided at one end of the water inlet plug body facing the water inlet channel of the valve cover, the second water inlet groove is recessed inwardly from the first end wall of the water inlet plug body, and the water inlet end of each water inlet plug channel is located in the second water inlet groove; a second water outlet recess is provided at one end of the water inlet plug body facing the water inlet channel of the valve seat, the second water outlet recess is a concave arc surface recessed inwardly from the second end wall of the water inlet plug body, and the water outlet end of each water inlet plug channel is located in the second water outlet recess; the water outlet check valve can cover the second water outlet recess.

[0019] It can be seen that by providing a second water inlet groove and a second water outlet recess on the water inlet plug body, the water inlet plug body and the second mounting groove are easily matched in the axial direction of the water inlet plug body, and at the same time, the conduction of the water inlet plug channel and the water outlet plug channel will not be affected.

[0020] A further solution is that the water outlet check valve includes a second valve plate and a second fixing member; the second fixing member includes a second limiting portion and a second fixing portion connected along the axial direction of the second fixing member, and the second valve plate is restricted between the second limiting portion and the second water outlet recess; the diameter of the second limiting portion is larger than the diameter of the second fixing portion and smaller than the diameter of the second valve plate; a second through hole is provided on the second valve plate, and a second positioning hole is provided in the second water outlet recess of the water inlet plug body, and the second fixing portion is fixedly connected to the second positioning hole after passing through the second through hole; the second limiting portion and the second end wall of the water inlet plug body are limitedly matched with the second mounting groove in the axial direction of the water inlet plug body.

[0021] It can be seen that the second fixing member is used to fix the second valve plate on the water inlet plug body, and at the same time, together with the first end wall of the water inlet plug body, cooperates with the inner wall of the second mounting groove in the axial direction to achieve axial limitation. At the same time, the second limiting portion and the second water outlet recess fix the second valve plate, and the water flowing into the water inlet channel of the valve cover applies a force to the second valve plate, forcing the second valve plate to deform, thereby achieving conduction of the water inlet plug channel.

[0022] A preferred solution is that the outer periphery of the valve plate assembly is clamped between the valve seat and the valve cover; a mounting groove is formed between the water outlet end of the valve cover water inlet channel and the water inlet end of the valve seat water inlet channel, and the water inlet plug is arranged in the mounting groove; in the axial direction of the water inlet plug, the end wall of the mounting groove and the water outlet check valve are respectively matched with the water inlet plug at both ends of the water inlet plug; the water inlet plug includes a support column and a plug channel portion arranged along the axial direction, the support column abuts against the end wall of the mounting groove, and the plug channel portion abuts against the water outlet check valve; the outer diameter of the plug channel portion is larger than the diameter of the support column, the water inlet plug channel is located on the plug channel portion and penetrates the plug channel portion axially, and the water inlet plug channel is recessed inward from the outer peripheral wall of the water inlet plug along the radial direction of the water inlet plug.

[0023] It can be seen that the support column can support the valve plate when the diaphragm moves toward the side of the valve assembly. At this time, the water outlet check valve is attached to the end wall of the plug channel of the water inlet plug and covers the water inlet plug channel. When the diaphragm moves away from the valve assembly, due to the smaller diameter of the support column, more liquid can enter the second installation groove, pass through the water inlet plug channel, and enter the valve seat water inlet channel from the side of the water inlet plug channel through the water flow channel on the valve assembly.

[0024] To achieve the above second objective, the utility model provides a pressure pump, comprising a diaphragm and the above valve assembly, wherein the diaphragm is located at a diaphragm mounting portion.

[0025] To achieve the third objective, the utility model provides a coffee machine including the pressure pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional view of the first embodiment of the pressure pump of the utility model along the axial direction of the motor.

[0027] Figure 2 It is a structural exploded view of the first embodiment of the pressure pump of the utility model.

[0028] Figure 3 It is a structural exploded view from a first perspective of the connector and the diaphragm in the first embodiment of the diaphragm drive assembly of the utility model.

[0029] Figure 4 It is a structural exploded view from a second perspective of the connector and the diaphragm in the first embodiment of the diaphragm drive assembly of the utility model.

[0030] Figure 5 It is a structural diagram of the connecting member and the diaphragm in the first embodiment of the diaphragm drive assembly of the utility model.

[0031] Figure 6 It is a cross-sectional view of the first embodiment of the pressure pump of the utility model along the radial direction of the motor.

[0032] Figure 7 It is a structural exploded view from a first perspective of a valve assembly in a first embodiment of a pressure pump of the utility model.

[0033] Figure 8 It is a structural exploded view of the valve assembly in the first embodiment of the pressure pump of the utility model from a second perspective.

[0034] Fig. 9 It is a cross-sectional view of the fourth embodiment of the pressure pump of the utility model.

[0035] Fig.10 yes Fig. 9 A partial enlarged view of point A in the middle.

[0036] Fig.11It is a structural exploded view of the valve assembly in the fourth embodiment of the pressure pump of the utility model.

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0038] First embodiment of the valve assembly, diaphragm drive assembly and pressure pump:

[0039] See also Figures 1 to 6 The pressure pump of this embodiment includes a pump housing 11, a valve assembly 12 and a diaphragm drive assembly 13.

[0040] See also Figures 6 to 8 The valve assembly 12 includes a valve seat 121, a valve plate assembly 122, a valve cover 123 and a water inlet plug 125. The valve seat 121 is provided with a valve seat water inlet channel 1211 and a valve seat water outlet channel 1212. The valve plate assembly 122 is located between the valve seat 121 and the valve cover 123. The valve plate assembly 122 includes a water inlet check valve 1221 and a water outlet check valve 1222. The valve cover 123 is provided with a valve cover water inlet channel 1231 and a valve cover water outlet channel 1232. The water inlet check valve 1221 is arranged between the valve seat water outlet channel 1212 and the valve cover water outlet channel 1232. The water outlet check valve 1222 is arranged between the valve seat water inlet channel 1211 and the valve cover water inlet channel 1231. The water inlet plug 125 is detachably mounted on the water outlet end of the valve cover water inlet channel 1231. A water inlet plug channel 1251 is axially penetrated through the water inlet plug 125. The number of the water inlet plug channels 1251 is more than two. The plurality of water inlet plug channels 1251 are arranged at intervals along the circumference of the water inlet plug 125. Each water inlet plug channel 1251 can be covered by the water outlet check valve 1222.

[0041] The outer periphery of the valve plate assembly 122 is clamped between the valve seat 121 and the valve cover 123, and the water outlet end of the valve cover water inlet channel 1231 and the water inlet end of the valve seat water inlet channel 1211 form a mounting groove 126. The water inlet plug 125 is arranged in the mounting groove 126, and the axial direction of the water inlet plug 125 is perpendicular to the plane where the water outlet check valve 1222 is located. In the axial direction of the water inlet plug 125, the end wall of the mounting groove 126 and the water outlet check valve 1222 are respectively limitedly matched with the water inlet plug 125 at both ends of the water inlet plug 125.

[0042] The water inlet plug 125 includes a support column 1252 and a plug channel portion 1253 arranged along the axial direction, the support column 1252 abuts against the end wall of the mounting groove 126, the plug channel portion 1253 abuts against the water outlet check valve 1222, the outer diameter of the plug channel portion 1253 is larger than the diameter of the support column 1252, the water inlet plug channel 1251 is located on the plug channel portion 1253 and penetrates the plug channel portion 1253 along the axial direction, and the water inlet plug channel 1251 is recessed inward from the outer peripheral wall of the water inlet plug 125 along the radial direction of the water inlet plug 125.

[0043] The water outlet check valve 1222 is used to block the water inlet plug channel 1251 when water is discharged. When water is discharged, the valve cover water outlet channel 1232 is opened, and the support column 1252 supports the water outlet check valve 1222 when the diaphragm 16 of the diaphragm drive assembly 13 moves toward the side of the valve assembly 12. At this time, the water outlet check valve 1222 is attached to the end wall of the plug channel portion 1253 of the water inlet plug 125 and covers the water inlet plug channel 1251.

[0044] The water inlet check valve 1221 is used to block the water inlet end of the valve seat water inlet channel 1211 when water is entering. When water is entering, when the diaphragm 16 moves toward the side of the valve assembly 12, due to the smaller diameter of the support column 1252, more liquid can enter the installation groove 126. The liquid passes through the water inlet plug channel 1251, and then enters the valve seat water inlet channel 1211 from the side of the water inlet plug channel 1251 through the water flow channel 1223 on the valve assembly 12.

[0045] See also Figures 1 to 6 The diaphragm driving assembly 13 includes a driving member 14, a connecting member 15 and a diaphragm 16. The driving member 14 is a motor. A crankshaft connecting portion 151 is provided at the first end of the connecting member 15. The crankshaft connecting portion 151 is connected to the driving shaft 131 of the driving member 14 through an eccentric shaft 132. The driving member 14 drives the eccentric shaft 132 to rotate, thereby driving the connecting member 15 to reciprocate. The axis of the crankshaft connecting portion 151 is perpendicular to the moving direction of the connecting member 15.

[0046] The diaphragm 16 is disposed at the second end of the connector 15. The diaphragm 16 is made of an elastic material such as rubber or silicone, and the diaphragm 16 is disposed separately from the connector 15. Specifically, the diaphragm 16 includes an integrally formed diaphragm portion 161 and a mounting portion 162. The diaphragm portion 161 in this embodiment is in the shape of a circular plate. The mounting portion 162 extends outward from the diaphragm portion 161 toward the side wall of the connector 15 along the axial direction of the diaphragm portion 161. The projection of the connection position 166 between the mounting portion 162 and the diaphragm portion 161 along the moving direction of the connector 15 is located within the abutment surface 154 of the connector 15. When the connector 15 moves toward the diaphragm 16, there is a first contact area between the connector 15 and the diaphragm 16; when the connector 15 moves away from the diaphragm 16, there is a second contact area between the connector 15 and the diaphragm 16. The second contact area is smaller than the first contact area. For ease of understanding, Figure 6 The state shown is explained, when the diaphragm portion 161 is in Figure 6 When the connector 15 is in the undeformed position, only the front end of the contact surface 154 contacts the diaphragm portion 161. When the connector 15 continues to move to the left, the contact area between the diaphragm portion 161 and the contact surface 154 gradually increases. When the connector 15 is at the left end limit position, the contact area between the connector 15 and the diaphragm 16 is the largest. Figure 6 When the position shown continues to move rightward, the contact area between the diaphragm portion 161 and the abutment surface 154 gradually decreases. When the connector 15 is at the right extreme position, the contact area between the connector 15 and the diaphragm 16 is the smallest.

[0047] A limiting boss 163 is provided in the middle of the mounting portion 162. The limiting boss 163 includes a limiting wall 164 and a guiding oblique wall 165. The limiting wall 164 is provided toward the diaphragm portion 161, and the limiting wall 164 is provided perpendicular to the mounting portion 162. The guiding oblique wall 165 is provided away from the diaphragm portion 161. The diameter of the guiding oblique wall 165 gradually increases from the end away from the limiting wall 164 to the end close to the limiting wall 164. The setting of the guiding oblique wall 165 facilitates the worker to install the mounting portion 162 into the positioning hole 155 of the connector 15 along the axial direction of the mounting portion 162. The setting of the limiting wall 164 prevents the mounting portion 162 from being separated from the diaphragm connector 153 when the mounting portion 162 is subjected to the pulling force of the connector 15.

[0048] The connecting member 15 includes a crankshaft connecting member 152 and a diaphragm connecting member 153 arranged along the moving direction of the connecting member 15, the crankshaft connecting portion 151 is located on the crankshaft connecting member 152, the abutting surface 154 is located on the diaphragm connecting member 153 and is arranged toward the diaphragm portion 161, and the abutting surface 154 can abut against the diaphragm portion 161. Preferably, the abutting surface 154 is a convex arc surface convex toward the diaphragm portion 161.

[0049] As the connecting member 15 moves toward the diaphragm 16 , the abutting surface 154 applies a force to the diaphragm 16 to force the diaphragm 16 to deform; as the connecting member 15 moves away from the diaphragm 16 , the force between the abutting surface 154 and the diaphragm 16 decreases, and the diaphragm 16 is restored.

[0050] The connector 15 is provided with a positioning hole 155, which extends from the middle of the abutting surface 154 of the connector 15 in a direction away from the diaphragm portion 161, and the mounting portion 162 extends into the positioning hole 155. The limiting wall 164 of the upper limit boss 163 of the mounting portion 162 cooperates with the diaphragm connector 153 to limit the movement direction of the connector 15.

[0051] A diaphragm positioning groove 120 (i.e., a diaphragm mounting portion) is formed between the valve seat 121 and the pump housing 11, the diaphragm portion 161 is located at the diaphragm positioning groove 120 and the outer peripheral edge of the diaphragm portion 161 is clamped between the valve seat 121 and the pump housing 11, and a clearance groove 124 is also provided on the valve seat 121 on the side facing the pump housing 11, the clearance groove 124 is recessed from the bottom wall of the diaphragm positioning groove 120 toward a direction away from the pump housing 11, the diaphragm portion 161 and the clearance groove 124 form a pressure chamber, the valve seat water inlet channel 1211 and the valve seat water outlet channel 1212 are connected through the pressure chamber, the diaphragm connector 153 is arranged opposite to the clearance groove 124, and the projection of the diaphragm connector 153 along the moving direction of the connector 25 is located in the clearance groove 124.

[0052] A limiting groove 156 is also provided on the diaphragm connector 153, an insertion port 157 is provided above the limiting groove 156, a clearance opening 158 is provided on the side of the limiting groove 156 away from the diaphragm portion 161, and one end of the crankshaft connector 152 away from the crankshaft connecting portion 151 is inserted into the limiting groove 156 from the insertion port 157 along the vertical direction, and the crankshaft connector 152 passes through the clearance opening 158 along the moving direction of the connector 15, and the crankshaft connector 152 and the diaphragm connector 153 cooperate in the limit position in the moving direction of the connector 15.

[0053] During assembly, the mounting portion 162 can be first inserted into the positioning hole 155 to achieve the limiting between the diaphragm 16 and the diaphragm connector 153, and then, the assembly formed by the diaphragm 16 and the diaphragm connector 153 is placed at the first opening 111 on the front side of the pump housing 11, and then, the crankshaft connector 152 is assembled downward from the second opening 112 on the upper side of the pump housing 11 along the vertical direction until the crankshaft connector 152 is inserted into the limiting groove 156 from the insertion port 157, thereby completing the assembly of the diaphragm 16, the diaphragm connector 153 and the crankshaft connector 152. The assembly process is simple, which can improve the assembly efficiency and thus improve the production efficiency.

[0054] As can be seen from the above, by setting the diaphragm and the connecting member separately, as the connecting member moves toward the diaphragm, the abutting surface applies a force to the diaphragm to force the diaphragm to deform; as the connecting member moves away from the diaphragm, the force between the abutting surface and the diaphragm decreases, and the diaphragm is reset. Therefore, when the crankshaft connecting part applies a force to the connecting member to drive the connecting member to move in a direction away from the diaphragm, due to the small contact area between the mounting part and the diaphragm part, when the mounting part applies a pulling force to the diaphragm part, the force received is concentrated at the center of the diaphragm part. Therefore, the deformation of the diaphragm part is small, and the diaphragm will not be torn, thereby avoiding affecting the operation of the pressure pump using the diaphragm drive assembly. In addition, by setting a water inlet plug or a water outlet plug, the valve seat, the valve cover and the corresponding water inlet and outlet arranged thereon are separated. In this way, a smaller water inlet plug channel and a water outlet plug channel can be set as needed, thereby increasing the outlet water pressure and improving the coffee extraction effect. In addition, by forming the corresponding water inlet and outlet channels on each plug separately, the forming process is also simpler due to the simple structure of the plug.

[0055] Second embodiment of the valve assembly, diaphragm drive assembly and pressure pump:

[0056] As an explanation of the second embodiment of the valve assembly, diaphragm drive assembly and pressure pump of the utility model, only the differences from the first embodiment of the valve assembly, diaphragm drive assembly and pressure pump are explained below.

[0057] See also Figures 9 to 11 The valve assembly 42 also includes a water outlet plug 426, which is detachably mounted on the water inlet end of the valve cover water outlet channel 4232. A water outlet plug channel 4261 is axially penetrated through the water outlet plug 426. The number of the water outlet plug channels 4261 is more than two. The plurality of water outlet plug channels 4261 are arranged at intervals along the circumference of the water outlet plug 426, and each water outlet plug channel 4261 can be covered by the water inlet check valve 4221.

[0058] A first installation groove 421 is formed between the water inlet end of the valve cover water outlet channel 4232 and the water outlet end of the valve seat water outlet channel 4212 , and the water outlet plug 426 is disposed in the first installation groove 421 .

[0059] The water outlet plug 426 includes a water outlet plug body 4262 and a water outlet positioning ring 4263. The water outlet positioning ring 4263 protrudes outward from the peripheral wall of the water outlet plug body 4262 along the radial direction of the water outlet plug body 4262 and extends along the circumference of the water outlet plug body 4262. The water outlet positioning ring 4263 is matched with the peripheral wall clearance of the first installation groove 421. Each water outlet plug channel 4261 is located on the water outlet plug body 4262 and extends along the axial direction of the water outlet plug body 4262. The water outlet positioning ring 4263 of the water outlet plug 426 is used to realize the positioning relative to the valve cover 423 in the radial direction to prevent the water outlet plug 426 from shaking in the first installation groove 421 and affecting the water outlet.

[0060] A first water inlet groove 4264 is provided at one end of the water outlet plug body 4262 facing the water outlet channel 4212 of the valve seat. The first water inlet groove 4264 is recessed inwardly from the first end wall of the water outlet plug body 4262. The water inlet ends of each water outlet plug channel 4261 are located in the first water inlet groove 4264. A first water outlet recess 4265 is provided at one end of the water outlet plug body 4262 facing the water outlet channel 4232 of the valve cover. The first water outlet recess 4265 is a concave arc surface recessed inwardly from the second end wall of the water outlet plug body 4262. The water outlet ends of each water outlet plug channel 4261 are located in the first water outlet recess 4265. The water inlet check valve 4221 can cover the first water outlet recess 4265. By providing the first water inlet groove 4264 and the first water outlet recess 4265 on the water outlet plug body 4262, it is convenient for the water outlet plug body 4262 to be limitedly matched with the first mounting groove 421 in the axial direction of the water outlet plug body 4262 without affecting the conduction between the water outlet plug channel 4261 and the water inlet plug channel 4251.

[0061] The water inlet check valve 4221 includes a first valve disc 401 and a first fixing member 402. The first fixing member 402 includes a first limiting portion 403 and a first fixing portion 404 connected along the axial direction of the first fixing member 402. The first valve disc 401 is limited between the first limiting portion 403 and the first water outlet recess 4265. The diameter of the first limiting portion 403 is larger than the diameter of the first fixing portion 404 and smaller than the diameter of the first valve disc 401. A first through hole 411 is provided on the first valve disc 401. A first positioning hole 42621 is provided in the first water outlet recess 4265 of the water outlet plug head body 4262. The first fixing portion 404 passes through the first through hole 411 and is fixedly connected to the first positioning hole 42621. The first limiting portion 403 and the first end wall of the water outlet plug head body 4262 are limitedly matched with the first mounting groove 421 in the axial direction of the water outlet plug head body 4262. The first fixing member 402 is used to fix the first valve disc 401 on the water outlet plug head body 4262, and at the same time, together with the first end wall of the water outlet plug head body 4262, cooperates with the inner wall of the first mounting groove 421 in the axial direction to achieve axial limitation. At the same time, the first limiting portion 403 and the first water outlet recess 4265 fix the first valve disc 401, and the water flowing out of the valve seat water outlet channel 4212 applies a force to the first valve disc 401, forcing the first valve disc 401 to deform, and the outer peripheral edge of the first valve disc 401 leaves the first water outlet recess 4265, thereby achieving conduction of the water outlet plug head channel 4261.

[0062] A second mounting groove 422 is formed between the water outlet end of the valve cover water inlet channel 4231 and the water inlet end of the valve seat water inlet channel 4211. The water inlet plug 425 is arranged in the second mounting groove 422. The water inlet plug 425 includes a water inlet plug body 4252 and a water inlet positioning ring 4253. The water inlet positioning ring 4253 protrudes outward from the peripheral wall of the water inlet plug body 4252 along the radial direction of the water inlet plug body 4252 and extends along the circumferential direction of the water inlet plug body 4252. The water inlet positioning ring 4253 is matched with the peripheral wall clearance of the second mounting groove 422. Each water inlet plug channel 4251 is located on the water inlet plug body 4252 and extends along the axial direction of the water inlet plug body 4252. The water inlet positioning ring 4253 of the water inlet plug 425 is used to achieve radial positioning relative to the valve cover 423 and the valve seat 420 to prevent the water inlet plug 425 from shaking in the second installation groove 422 and affecting water inflow.

[0063] A second water inlet groove 4254 is provided at one end of the water inlet plug body 4252 toward the water inlet channel 4231 of the valve cover, and the second water inlet groove 4254 is recessed inwardly from the first end wall of the water inlet plug body 4252, and the water inlet end of each water inlet plug channel 4251 is located in the second water inlet groove 4254, and a second water outlet recess 4255 is provided at one end of the water inlet plug body 4252 toward the water inlet channel 4211 of the valve seat, and the second water outlet recess 4255 is a concave arc surface recessed inwardly from the second end wall of the water inlet plug body 4252, and the water outlet end of each water inlet plug channel 4251 is located in the second water outlet recess 4255, and the water outlet check valve 4222 can cover the second water outlet recess 4255. By providing a second water inlet groove 4254 and a second water outlet recess 4255 on the water inlet plug body 4252, it is convenient for the water inlet plug body 4252 to be limitedly matched with the second mounting groove 422 in the axial direction of the water inlet plug body 4252 without affecting the conduction of the water inlet plug channel 4251 and the water outlet plug channel 4261.

[0064] The water outlet check valve 4222 includes a second valve disc 405 and a second fixing member 406. The second fixing member 406 includes a second limiting portion 407 and a second fixing portion 408 connected along the axial direction of the second fixing member 406. The second valve disc 405 is limited between the second limiting portion 407 and the second water outlet recess 4255. The diameter of the second limiting portion 407 is larger than the diameter of the second fixing portion 408 and smaller than the diameter of the second valve disc 405. A second through hole 415 is provided on the second valve disc 405. A second positioning hole 42521 is provided in the second water outlet recess 4255 of the water inlet plug head body 4252. The second fixing portion 408 passes through the second through hole 415 and is fixedly connected to the second positioning hole 42521. The second limiting portion 407 and the second end wall of the water inlet plug head body 4252 are limitedly matched with the second mounting groove 422 in the axial direction of the water inlet plug head body 4252. The second fixing member 406 is used to fix the second valve disc 405 on the water inlet plug head body 4252, and at the same time, together with the first end wall of the water inlet plug head body 4252, cooperates with the inner wall of the second mounting groove 422 in the axial direction to achieve axial limitation. At the same time, the second limiting portion 407 and the second water outlet recess 4255 fix the second valve disc 405, and the water flowing in from the valve cover water inlet channel 4231 applies a force to the second valve disc 405, forcing the second valve disc 405 to deform, and the outer peripheral edge of the second valve disc 405 leaves the second water outlet recess 4255, thereby achieving conduction of the water inlet plug head channel 4251.

[0065] Coffee machine embodiment:

[0066] The coffee machine in this embodiment includes a coffee brewing unit and a pressure pump in the above-mentioned pressure pump embodiments, and the pressure pump is used to inject water into the coffee brewing unit.

[0067] Finally, it should be emphasized that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Valve assembly, including valve seat, valve plate assembly and valve cover; The valve seat is provided with a valve seat water inlet channel and a valve seat water outlet channel, and a diaphragm mounting portion is provided on a side of the valve seat away from the valve cover; The valve plate assembly is located between the valve seat and the valve cover, and the valve plate assembly includes a water inlet check valve and a water outlet check valve; The valve cover is provided with a valve cover water inlet channel and a valve cover water outlet channel; Features: The valve assembly further comprises an inlet plug head, which is detachably mounted on the water outlet end of the water inlet channel of the valve cover, and an inlet plug head channel is axially penetrated on the inlet plug head, the number of the inlet plug head channels is more than two, and the plurality of inlet plug head channels are arranged at intervals along the circumference of the inlet plug head, and each of the inlet plug head channels can be covered by the water outlet check valve; and / or The valve assembly also includes a water outlet plug, which is detachably mounted on the water inlet end of the valve cover water outlet channel. A water outlet plug channel is axially penetrated through the water outlet plug. There are more than two water outlet plug channels, and a plurality of water outlet plug channels are arranged at intervals along the circumference of the water outlet plug. Each of the water outlet plug channels can be covered by the water inlet check valve.

2. The valve assembly according to claim 1, characterized in that: A first installation groove is formed between the water inlet end of the water outlet channel of the valve cover and the water outlet end of the water outlet channel of the valve seat, and the water outlet plug is arranged in the first installation groove; The water outlet plug comprises a water outlet plug body and a water outlet positioning ring; The water outlet positioning ring protrudes outward from the peripheral wall of the water outlet plug head body along the radial direction of the water outlet plug head body and extends along the circumference of the water outlet plug head body, and the water outlet positioning ring is gap-matched with the peripheral wall of the first installation groove; Each of the water outlet plug head channels is located on the water outlet plug head body and extends along the axial direction of the water outlet plug head body.

3. The valve assembly according to claim 2, characterized in that: A first water inlet groove is formed at one end of the water outlet plug body facing the water outlet channel of the valve seat. The first water inlet groove is recessed inward from the first end wall of the water outlet plug body. The water inlet end of each water outlet plug channel is located in the first water inlet groove. A first water outlet recess is formed at one end of the water outlet plug body facing the water outlet channel of the valve cover. The first water outlet recess is a concave arc surface that is recessed inward from the second end wall of the water outlet plug body. The water outlet ends of each water outlet plug channel are located in the first water outlet recess. The water inlet check valve can cover the first water outlet recess.

4. The valve assembly according to claim 3, characterized in that: The water inlet check valve comprises a first valve plate and a first fixing member; The first fixing member comprises a first limiting portion and a first fixing portion connected along the axial direction of the first fixing member, and the first valve plate is limited between the first limiting portion and the first water outlet recess; The diameter of the first limiting portion is larger than the diameter of the first fixing portion and smaller than the diameter of the first valve plate; A first through hole is formed on the first valve plate, a first positioning hole is formed in the first water outlet recess of the water outlet plug body, and the first fixing portion passes through the first through hole and is fixedly connected to the first positioning hole; The first limiting portion and the first end wall of the water outlet plug head body are limitedly matched with the first mounting groove in the axial direction of the water outlet plug head body.

5. The valve assembly according to any one of claims 1 to 4, characterized in that: A second installation groove is formed between the water outlet end of the water inlet channel of the valve cover and the water inlet end of the water inlet channel of the valve seat, and the water inlet plug is arranged in the second installation groove; The water inlet plug comprises a water inlet plug body and a water inlet positioning ring; The water inlet positioning ring protrudes outward from the peripheral wall of the water inlet plug head body along the radial direction of the water inlet plug head body and extends along the circumference of the water inlet plug head body, and the water inlet positioning ring is clearance-matched with the peripheral wall of the second installation groove; Each of the water inlet plug head channels is located on the water inlet plug head body and extends along the axial direction of the water inlet plug head body.

6. The valve assembly according to claim 5, characterized in that: A second water inlet groove is formed at one end of the water inlet plug body facing the water inlet channel of the valve cover. The second water inlet groove is recessed inward from the first end wall of the water inlet plug body. The water inlet end of each water inlet plug channel is located in the second water inlet groove. A second water outlet recess is formed at one end of the water inlet plug body facing the water inlet channel of the valve seat, and the second water outlet recess is a concave arc surface that is recessed inward from the second end wall of the water inlet plug body, and the water outlet end of each water inlet plug channel is located in the second water outlet recess; The water outlet check valve can cover the second water outlet recess.

7. The valve assembly according to claim 6, characterized in that: The water outlet check valve comprises a second valve plate and a second fixing member; The second fixing member comprises a second limiting portion and a second fixing portion connected along the axial direction of the second fixing member, and the second valve plate is limited between the second limiting portion and the second water outlet recess; The diameter of the second limiting portion is larger than the diameter of the second fixing portion and smaller than the diameter of the second valve plate; A second through hole is formed on the second valve plate, a second positioning hole is formed in the second water outlet recess of the water inlet plug body, and the second fixing portion passes through the second through hole and is fixedly connected to the second positioning hole; The second limiting portion and the second end wall of the water inlet plug head body are limitedly matched with the second mounting groove in the axial direction of the water inlet plug head body.

8. The valve assembly according to claim 1, characterized in that: The outer periphery of the valve plate assembly is clamped between the valve seat and the valve cover; A mounting groove is formed between the water outlet end of the water inlet channel of the valve cover and the water inlet end of the water inlet channel of the valve seat, and the water inlet plug is arranged in the mounting groove; In the axial direction of the water inlet plug, the end wall of the installation groove and the water outlet check valve are respectively limitedly matched with the water inlet plug at both ends of the water inlet plug; The water inlet plug includes a support column and a plug channel portion arranged along the axial direction, the support column abuts against the end wall of the mounting groove, and the plug channel portion abuts against the water outlet check valve; The outer diameter of the plug channel portion is greater than the diameter of the support column. The water inlet plug channel is located on the plug channel portion and penetrates the plug channel portion axially. The water inlet plug channel is recessed inward from the outer peripheral wall of the water inlet plug along the radial direction of the water inlet plug.

9. A pressure pump, characterized in that: The invention comprises a diaphragm and a valve assembly according to any one of claims 1 to 8, wherein the diaphragm is located at a diaphragm mounting portion.

10. A coffee machine, characterized in that Comprising the pressure pump as claimed in claim 9.

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