Pressure switch and water purifier with same

Abstract

The utility model provides a pressure switch and a water purifier with the same. The pressure switch comprises a housing, an elastic sheet assembly, a first plug wire terminal, a second plug wire terminal and an attraction assembly. The elastic piece assembly comprises a reed and a push rod, one end of the reed is connected with the first end of the first plug wire terminal, the other end of the reed is provided with a movable contact, the first end of the second plug wire terminal is provided with a static contact, the static contact is installed on the shell, the attraction assembly comprises an attraction piece and an attracted piece, the attracted piece is installed on the movable contact or the shell, and the push rod is installed on the attraction piece. The attraction part is arranged on the static contact, one end of the push rod is connected with the middle of the reed, and the push rod is movably arranged along the axis of the installation cavity so that the movable contact can be away from the static contact or connected with the static contact. Due to the action of the attraction assembly, the reed does not need to be kept in a bent state for a long time, and fatigue strain caused by repeated bending of the reed is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to water purifier technical field, concretely relates to a pressure switch and water purifier with the pressure switch. BACKGROUND

[0002] On the water outlet section pipeline of the water purifier, a pressure switch is usually configured to detect the water taking state of the user. When the user opens or closes the water taking faucet, the water pressure change in the water outlet pipe will trigger the pressure switch, and then send an on-off signal to the water purifier controller to control the water making operation of the water purifier. However, in the long-term use process of the conventional pressure switch, the spring leaf inside the pressure switch will produce fatigue strain due to repeated bending, resulting in a decrease in the elastic force. In particular, when the water purifier is in a shutdown state, the spring leaf is in forced bending for a long time, which aggravates its irreversible deformation. This deformation will cause poor contact of the contact points, and even complete failure, thereby affecting the normal use of the water purifier. SUMMARY

[0003] The utility model provides a pressure switch and water purifier with the pressure switch, can solve the spring leaf long-term in forced bending, aggravate its irreversible deformation, this deformation will cause the technical problem of poor contact of the contact points.

[0004] The utility model provides a pressure switch, it includes casing, spring leaf subassembly, first plug wire terminal, second plug wire terminal and attraction subassembly;

[0005] The casing has installation cavity, the first end of first plug wire terminal and the first end of second plug wire terminal are in the installation cavity, the second end of first plug wire terminal and the second end of second plug wire terminal are stretched out from the casing;

[0006] The spring leaf subassembly includes spring leaf and push rod, one end of spring leaf is connected with the first end of first plug wire terminal, the other end of spring leaf is provided with moving contact, the first end of second plug wire terminal is provided with static contact, the static contact is installed on the casing, and the moving contact and the static contact are oppositely arranged;

[0007] The attraction subassembly includes attraction piece and attracted piece, the attracted piece is installed on the moving contact or the casing, the attraction piece is arranged on the static contact, one end of push rod is connected with the middle part of spring leaf, the other end of push rod is stretched out from the casing, the push rod is movably arranged along the axis of the installation cavity, so that the moving contact is away from the static contact or connected with the static contact.

[0008] In some embodiments, the attraction piece is a magnet, and the attracted piece is an iron sheet.

[0009] In some embodiments, the attracted member is arranged on an end surface of the movable contact away from the fixed contact, a bottom of the attracted member is connected with the shell, and a top of the attracted member is provided with the fixed contact.

[0010] In some embodiments, the attracted member is arranged on an end surface of the movable contact away from the fixed contact, a bottom of the attracted member is connected with the shell, and a top of the attracted member is provided with the fixed contact.

[0011] In some embodiments, the pressure switch further comprises a connecting rod, a first end of the connecting rod is connected with the shell, a second end of the connecting rod is provided with an inlet and outlet, an inner cavity of the connecting rod has a medium passage, the medium passage is in communication with the inlet and outlet, and the push rod is inserted into the medium passage at an end away from the reed.

[0012] In some embodiments, the shell is further provided with a pushing assembly, the pushing assembly comprises a diaphragm and a pressing plate, one end surface of the diaphragm is connected with the first end of the connecting rod, the other end surface of the diaphragm is connected with the pressing plate, the diaphragm divides the medium passage into a first chamber and a second chamber which are isolated from each other, and the push rod is inserted into the first chamber at an end away from the reed and connected with the diaphragm.

[0013] In some embodiments, the shell is provided with a bottom plate, the mounting cavity is formed between the shell and the bottom plate, the attracted member is arranged in the bottom plate, the bottom plate is connected with the pressing plate, the bottom plate is provided with a first through hole, the pressing plate is provided with a second through hole, the push rod passes through the first through hole and the second through hole in sequence and is connected with the diaphragm.

[0014] In some embodiments, the first through hole has a smaller diameter than the second through hole, and a sealing member is arranged at the first through hole.

[0015] A water purifier comprises a pressure switch, and the pressure switch is the pressure switch described above.

[0016] The pressure switch and the water purifier with the same have the following beneficial effects:

[0017] The separation of the moving contact and the static contact is determined by the pressure in the water outlet section pipeline of the water purifier, when the pressure in the pipeline rises, the push rod will move to cause the reed to deform and bend, and the moving contact and the static contact are separated. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be derived from the provided drawings without creative labor.

[0019] Figure 1 It is a schematic view of the pressure switch of the embodiment of the present utility model;

[0020] Figure 2 It is a schematic view of the attraction assembly of the embodiment of the present utility model;

[0021] Figure 3 It is a schematic view of the connection of the reed and the push rod of the embodiment of the present utility model;

[0022] Figure 4 It is a schematic view of the pushing assembly of the embodiment of the present utility model;

[0023] Figure 5 It is a schematic view of the pressing plate and the bottom plate of the embodiment of the present utility model.

[0024] Fig. 1 - housing; 101 - mounting cavity; 2 - leaf spring assembly; 201 - leaf spring; 202 - push rod; 3 - first patch cord terminal; 31 - first end of first patch cord terminal; 32 - second end of first patch cord terminal; 4 - second patch cord terminal; 41 - first end of second patch cord terminal; 42 - second end of second patch cord terminal; 5 - attraction assembly; 501 - attractor; 502 - attracted object; 61 - movable contact; 62 - stationary contact; 7 - link; 71 - first end of link; 72 - second end of link; 73 - first chamber; 74 - second chamber; 701 - medium passage; 702 - inlet / outlet; 8 - push assembly; 801 - diaphragm; 802 - pressing plate; 821 - second through hole; 9 - bottom plate; 901 - first through hole. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and in the absence of the opposite description, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0027] For purposes of the description hereinafter, spatially relative terms, such as "above", "below", "up", "down", "between", "within", "left", "right", "rear", "front", "upper", "lower", "horizontal", "vertical", "above", "below", "top", "bottom", "under", and the like, can be used for ease of description to describe one element's or feature's spatial position or relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device in the figures is inverted, elements described as "above" or "up" other elements or features would then be oriented "below" or "down" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. The terms "first", "second", "third", etc. can be used herein to describe various elements, components, regions and / or sections. These terms are used merely to distinguish one element, component, region and / or section from another element, component, region and / or section, and do not otherwise limit the scope of the present disclosure. Unless otherwise stated, the terms "first", "second", "third", etc. are not intended to denote a particular order or sequence.

[0028] In addition, it should be noted that the use of "first", "second", etc. words to define parts, only for the convenience of the corresponding parts, as there is no declaration, the above words have no special meaning, therefore can not be understood as the limitation of the scope of protection of the present application.

[0029] Referring to Figure 1 and Figure 2 According to the embodiment of the present application, a pressure switch is provided, which comprises a shell 1, a spring piece assembly 2, a first plug terminal 3, a second plug terminal 4 and an attraction assembly 5. The shell 1 has a mounting cavity 101 therein, the first end 31 of the first plug terminal 3 and the first end 41 of the second plug terminal 4 extend into the mounting cavity 101, and the second end 32 of the first plug terminal 3 and the second end 42 of the second plug terminal 4 extend out of the shell 1. The spring piece assembly 2 comprises a reed 201 and a push rod 202, one end of the reed 201 is connected to the first end 31 of the first plug terminal 3, and the other end of the reed 201 is provided with a moving contact 61, the first end 41 of the second plug terminal 4 is provided with a stationary contact 62, the stationary contact 62 is mounted on the shell 1, and the moving contact 61 and the stationary contact 62 are oppositely arranged. The attraction assembly 5 comprises an attraction piece 501 and an attracted piece 502, the attracted piece 502 is mounted on the moving contact 61 or the shell 1, the attraction piece 501 is arranged on the stationary contact 62, one end of the push rod 202 is connected to the middle of the reed 201, the other end of the push rod 202 extends out of the shell 1, and the push rod 202 is movably arranged along the axis of the mounting cavity 101, so that the moving contact 61 is away from or connected to the stationary contact 62.

[0030] Specifically, the second end 42 of the first and second plug-in terminals 3 and 4 extends out of the shell 1, the first end 31 of the first plug-in terminal 3 is connected to one end of the spring 201, the movable contact 61 is connected to the other end of the spring 201, that is, the two ends of the spring 201 are respectively connected to the first plug-in terminal and the movable contact 61, the fixed contact 62 is mounted on the shell 1, and the movable contact 61 and the fixed contact 62 are oppositely arranged. The push rod 202 is connected to the spring 201, when the push rod 202 moves along the axis of the mounting cavity 101 towards the spring 201, the push rod 202 pushes the spring 201 to arch upwards, the spring 201 is deformed, since one end of the spring 201 is fixed by the first plug-in terminal 3, and the end of the spring 201 connected to the movable contact 61 can move relatively, therefore, after being pushed by the push rod 202, the spring 201 drives the movable contact 61 to separate from the fixed contact 62, after the movable contact 61 and the fixed contact 62 are separated, the electrical signal is cut off; when the push rod 202 gradually moves away from the spring 201 along the axis of the mounting cavity 101, the spring 201 returns to the natural state, under the action of the attracting member 501, the attracted member 502 presses the movable contact 61 and the fixed contact 62 tightly, the movable contact 61 and the fixed contact 62 are in contact, and the electrical signal is connected.

[0031] In the present embodiment, the switch is applied to the water outlet section pipeline of the water purifier, and the separation of the movable contact 61 and the fixed contact 62 is determined by the pressure in the water outlet section pipeline of the water purifier, when the pressure in the pipeline rises, the push rod 202 will move to cause the spring 201 to deform and bend, and the movable contact 61 and the fixed contact 62 are separated. In the present embodiment, by the attracting member 501 and the attracted member 502 in the attracting assembly 5, the movable contact 61 and the fixed contact 62 can be pressed tightly by the attraction force when the push rod 202 moves away from the spring 201, the reliability of the contact is ensured, the signal error caused by poor contact is reduced, and due to the action of the attracting assembly 5, the spring 201 does not need to be kept in the bent state for a long time, the fatigue strain of the spring 201 caused by repeated bending is reduced, and the service life of the spring 201 is prolonged, therefore, under the shutdown state of the water purifier, the spring 201 and the movable contact 61 will not be kept in the forced bent state for a long time due to the action of the attracting assembly 5, thereby reducing the risk of non-recoverable deformation and preventing poor contact or failure of the contacts, when the water pressure in the water outlet pipe changes, the push rod 202 pushes the spring 201 to separate or contact the movable contact 61 and the fixed contact 62, thereby automatically cutting off or connecting the electrical signal, so as to control the water making operation of the water purifier. In addition, due to the action of the attracting assembly 5, the movable contact 61 can quickly contact the fixed contact 62 when the push rod 202 moves away from the spring 201, the response speed to the change of the water pressure is improved, and by cutting off or connecting the power supply in time, damage to the water purifier caused by excessively high or low water pressure is avoided, thereby playing a protection role.

[0032] It is worth mentioning that the second end 42 of the first and second plug-in terminals 3 and 4 extends out of the shell 1, one of which is connected to the input signal line of the controller, and the other is connected to the output signal line of the controller.

[0033] Referring to Figure 1 and Figure 2 It is shown that the attracting member 501 is a magnet and the attracted member 502 is an iron sheet.

[0034] Specifically, the spring 201 drives the moving contact 61 to separate from the stationary contact 62, and after the moving contact 61 and the stationary contact 62 are separated, the attracting member 501 and the attracted member 502 are synchronously separated, at this time the electrical signal is cut off; when the push rod 202 gradually moves away from the spring 201 along the axis direction of the mounting cavity 101, the spring 201 returns to the natural state, and under the action of the attracting member 501, the attracted member 502 presses the moving contact 61 and the stationary contact 62 tightly, the moving contact 61 and the stationary contact 62 are in contact, and the electrical signal is connected.

[0035] In this embodiment, through the attracting action of the magnet on the iron sheet, stronger contact force between the moving contact 61 (the attracted member 502) and the stationary contact 62 (the contact mounted on the shell 1) can be ensured, thereby improving the reliability of the contact and reducing signal errors caused by poor contact. By using the attracting principle of the magnet and the iron sheet, the physical wear of the spring 201 and other mechanical components can be reduced, and the service life of the pressure switch can be prolonged. Moreover, the magnetic force can generate an attractive force without physical contact, and the attracting action of the magnet and the iron sheet can quickly respond to pressure changes, so that the separation and contact of the moving contact 61 and the stationary contact 62 are more rapid, and the response speed of the switch is improved. In addition, the attracting action of the magnet and the iron sheet does not require additional energy consumption, compared with mechanical components that need to be driven by electricity, this setting can reduce the overall energy consumption, the magnetic field generated by the magnet can stably attract the iron sheet, even in harsh environments such as vibration or impact, the stable contact state can be maintained, the stability of the pressure switch is improved, and by using the attracting principle of the magnet and the iron sheet, the setting of the pressure switch can be simplified, the use of mechanical components can be reduced, and the manufacturing cost and maintenance difficulty can be reduced.

[0036] Referring to Figure 1 and Figure 2 It is shown that the attracted member 502 is arranged on the end surface of the moving contact 61 away from the stationary contact 62, the bottom of the attracting member 501 is connected with the shell 1, and the top of the attracting member 501 is provided with the stationary contact 62.

[0037] In the embodiment, the end surface of the movable contact 61 is to be in contact with the end surface of the fixed contact 62, and therefore the attracted member 502 is arranged on the end surface of the movable contact 61 away from the fixed contact 62, the bottom of the attracting member 501 is connected with the shell 1, and the top of the attracting member 501 is provided with the fixed contact 62, which does not affect the contact between the attracting member 501 and the attracted member 502 and does not affect the contact between the movable contact 61 and the fixed contact 62. In the embodiment, the attraction between the magnet and the iron sheet can ensure that the movable contact 61 has a stronger contact force with the fixed contact 62, thereby improving the reliability of the contact and reducing signal errors caused by poor contact. Since the attracting member 501 (magnet) is fixed on the shell 1 and the attracted member 502 (iron sheet) is connected with the movable contact 61, the structure can ensure that the attraction between the magnet and the iron sheet can stably pull the movable contact 61 back to contact with the fixed contact 62 when the movable contact 61 moves due to pressure changes, thereby enhancing the stability of the structure.

[0038] Referring to FIGS. 1 to 3, Figure 1 and Figure 2 As shown in the figures, the attracting member 501 is an electromagnetic coil, the attracted member 502 is an electromagnet, the attracted member 502 is arranged on the end surface of the movable contact 61 away from the fixed contact 62, the bottom of the attracting member 501 is connected with the shell 1, and the top of the attracting member 501 is provided with the fixed contact 62.

[0039] Specifically, the presence or absence of magnetism can be controlled by turning on or off the current, and the strength of magnetism can be controlled by adjusting the current size or the number of turns of the coil. The size of the attraction force can be dynamically adjusted by changing the current of the electromagnetic coil to achieve more precise control. When the spring piece 201 drives the movable contact 61 to separate from the fixed contact 62, the electromagnetic coil is simultaneously powered off, and after the movable contact 61 and the fixed contact 62 are separated, the attracting member 501 and the attracted member 502 are simultaneously separated, and at this time the electrical signal is cut off. When the push rod 202 gradually moves away from the spring piece 201 along the axis direction of the mounting cavity 101, the spring piece 201 returns to the natural state, and under the action of the attracting member 501, the attracted member 502 presses the movable contact 61 and the fixed contact 62 tightly, the movable contact 61 and the fixed contact 62 are in contact, and the electrical signal is connected.

[0040] In the embodiment, since the presence or absence of magnetism and the strength of magnetism can be controlled by the current, the external control signal can be quickly responded. The magnetism generated by the electromagnetic coil can be realized by controlling the on-off of the current, and the magnetic field strength generated by the electromagnet can be adjusted by changing the current size flowing through the electromagnetic coil, thereby controlling the size of the attraction force. Since the magnetism of the electromagnet can disappear with the disappearance of the current, a permanent magnet is not needed.

[0041] Referring to FIGS. 1 to 3, Figures 1 to 3As shown, the pressure switch further comprises a connecting rod 7, a first end 71 of the connecting rod 7 is connected with the shell 1, a second end 72 of the connecting rod 7 is provided with an inlet and outlet 702, an inner cavity of the connecting rod 7 has a medium passage 701, the medium passage 701 is communicated with the inlet and outlet 702, and an end of the push rod 202 away from the reed 201 extends into the medium passage 701.

[0042] Specifically, the switch is applied to a water outlet section pipeline of the water purifier, and the separation of the moving contact 61 and the stationary contact 62 is determined by the pressure in the water outlet section pipeline of the water purifier. When the pressure in the pipeline rises, the pressure in the medium passage 701 increases, and then the push rod 202 moves, so that the reed 201 is deformed and bent, the moving contact 61 and the moving contact 61 are separated, the synchronous attracting piece 501 and the attracted piece 502 are also separated, the first plug terminal 3 and the second plug terminal 4 are disconnected, and the electric signal is cut off. When the water faucet is opened, the water pressure in the outlet pipe decreases, the pressure in the medium passage 701 decreases, and when the pressure reaches a certain value, the push rod 202 moves downward, the reed 201 also returns to the natural state, the moving contact 61 contacts the stationary contact 62, in this process, the attracting piece 501 attracts the attracted piece 502, the moving contact 61 presses the stationary contact 62, the electric signal is turned on, and the water purifier starts to make water.

[0043] In the embodiment, by monitoring the pressure change in the water outlet section pipeline, the water making operation of the water purifier is automatically controlled. When the user closes the water faucet, the pressure in the pipeline rises, the pressure switch is triggered, the electric signal is cut off, and the water making is stopped. When the user opens the water faucet, the pressure in the pipeline decreases, the pressure switch resets, the electric signal is turned on, and the water making is started. In the embodiment, by the pressure change in the medium passage 701, the pressure state of the water outlet section pipeline of the water purifier is monitored in real time, feedback is provided for the system, the push rod 202 directly responds to the pressure change in the medium passage 701, so that the switch can quickly respond to the pressure change of the water outlet section pipeline, and the power supply is cut off or turned on in time. When the pressure is too high, the power supply is automatically cut off to prevent equipment damage or safety accidents caused by too high pressure.

[0044] It is worth noting that in the embodiment, the push rod 202 is moved by the pressure change in the medium passage 701. Under the premise of ensuring a certain sealing property, the pressure change in the medium passage 701 can directly drive the push rod 202 to move, or a related diaphragm 801 is arranged to drive the push rod 202 to move.

[0045] For reference Figures 1 to 4As shown, the housing 1 is provided with a push assembly 8, the push assembly 8 includes a diaphragm 801 and a pressing plate 802, one end surface of the diaphragm 801 is connected with the first end 71 of the connecting rod 7, the other end surface of the diaphragm 801 is connected with the pressing plate 802, the diaphragm 801 and the pressing plate 802 are connected with the inner wall of the housing 1, the diaphragm 801 divides the medium passage 701 into the first chamber 73 and the second chamber 74 which are isolated from each other, the push rod 202 extends into the first chamber 73 and is connected with the diaphragm 801.

[0046] Specifically, the diaphragm 801 protrudes away from the installation chamber, when the pressure in the pipe rises, the pressure in the medium passage 701 increases, the pressure in the second chamber 74 increases, since the first chamber 73 and the second chamber 74 are isolated from each other, when the pressure in the first chamber 73 increases, the diaphragm 801 reversely supplies air, that is, the diaphragm 801 bends upward, since one end of the push rod 202 is connected with the diaphragm 801 and the other end is connected with the spring piece 201, the diaphragm 801 pushes the push rod 202 to move, thereby causing the spring piece 201 to deform and bend, the movable contact 61 and the movable contact 61 are separated, the synchronous attraction piece 501 and the attracted piece 502 are also separated, the first plug terminal 3 and the second plug terminal 4 are disconnected, and the electrical signal is cut off; when the water faucet is opened, the water pressure in the outlet pipe decreases, the pressure in the medium passage 701 decreases, when the pressure reaches a certain value, the pressure in the second chamber 74 decreases, the diaphragm 801 is not in the hand, the elasticity of the diaphragm 801 recovers, the push rod 202 moves downward, the spring piece 201 also returns to the natural state, the movable contact 61 contacts the fixed contact 62, in this process, the attraction piece 501 attracts the attracted piece 502, the movable contact 61 presses the fixed contact 62, the electrical signal is turned on, and the water purifier starts to produce water.

[0047] In the embodiment, the diaphragm 801 is arranged between the medium passage 701 and the electrical part, for isolating the medium from the electrical part and converting the medium pressure into a pushing force to be transmitted to the electrical part, the arrangement of the diaphragm 801 enables the pressure switch to respond to the slight change of the pressure in the pipe, thereby improving the sensitivity and accuracy of the pressure sensing, by dividing the medium passage 701 into the first chamber 73 and the second chamber 74, it is ensured that the pressure change only affects one side of the diaphragm 801, thereby avoiding the influence of the pressure fluctuation on the other side, the elastic deformation of the diaphragm 801 can quickly respond to the pressure change, so that the push rod 202 and the spring piece 201 can quickly act, thereby realizing the quick cutting and turning on of the electrical signal. In addition, since the elastic deformation of the diaphragm 801 replaces the direct pressure action, the wear of the contacts caused by the direct pressure is reduced, thereby prolonging the service life of the contacts, and the diaphragm 801 and the pressing plate 802 can withstand repeated pressure changes without being damaged.

[0048] For reference Figures 1 to 5As shown, the housing 1 is provided with a bottom plate 9, and an installation cavity 101 is formed between the housing 1 and the bottom plate 9, the suction member 501 is arranged in the bottom plate 9, the bottom plate 9 is connected with the pressing plate 802, the first through hole 901 is arranged on the bottom plate 9, the second through hole 821 is arranged on the pressing plate 802, and the push rod 202 passes through the first through hole 901 and the second through hole 821 in sequence and is connected with the diaphragm 801.

[0049] In the embodiment, the structure of the diaphragm 801 and the pressing plate 802 can more accurately sense the pressure change. The deformation of the diaphragm 801 is directly transmitted to the reed 201 through the push rod 202, so as to control the contact state of the moving contact 61 and the stationary contact 62, and realize accurate pressure control. The pressing plate 802 plays a role of pressing the diaphragm 801, and the connection of the bottom plate 9 and the pressing plate 802 provides a stable structural basis, so that the entire pressure switch can stably work when subjected to pressure change, and reduce errors caused by improper installation or external force. Moreover, through the structural arrangement of the bottom plate 9 and the pressing plate 802, the sealing property of the pressure switch can be improved. The arrangement that the push rod 202 passes through the first through hole 901 and the second through hole 821 in sequence simplifies the assembly process, so that the connection between the push rod 202, the diaphragm 801, the pressing plate 802 and the bottom plate 9 is more convenient and reliable. Moreover, the structure of the bottom plate 9 and the pressing plate 802 can protect the internal suction member 501 and the push rod 202, reduce the direct influence of the external environment on them, and thus improve the durability of the entire pressure switch.

[0050] For reference Figures 1 to 5 As shown, the diameter of the first through hole 901 is smaller than that of the second through hole 821, and the first through hole 901 is provided with a sealing member.

[0051] In the embodiment, the first through hole 901 has a smaller diameter than the second through hole 821, and the sealing member is used, so as to provide better sealing effect and prevent medium leakage. The smaller diameter and the sealing member can reduce the friction between the push rod 202 and the hole wall, protect the push rod 202 from abrasion, and prolong the service life thereof. The connection of the bottom plate 9 and the pressing plate 802 and the arrangement of the through holes with different diameters enhance the stability of the entire structure, so that the pressure switch can stably work when subjected to pressure change.

[0052] A water purifier comprises the pressure switch.

[0053] Specifically, when the pressure switch in the embodiment is arranged on the water outlet pipe of the water purifier, when the pressure in the pipe rises, the pressure in the medium passage 701 increases, and the pressure in the second chamber 74 increases, since the first chamber 73 and the second chamber 74 are isolated from each other, when the pressure in the first chamber 73 increases, the diaphragm 801 reversely supplies air, that is, the diaphragm 801 bends upward, since one end of the push rod 202 is connected with the diaphragm 801 and the other end is connected with the reed 201, the diaphragm 801 pushes the push rod 202 to move, thereby causing the reed 201 to deform and bend, the movable contact 61 and the movable contact 61 are separated, the synchronous attracting piece 501 and the attracted piece 502 are also separated, the first plug terminal 3 and the second plug terminal 4 are disconnected, and the electric signal is cut off; when the water faucet is opened, the water pressure in the water outlet pipe decreases, the pressure in the medium passage 701 decreases, when the pressure reaches a certain value, the pressure in the second chamber 74 decreases, the diaphragm 801 is not in the hand, the diaphragm 801 restores its elasticity, the push rod 202 moves downward, the reed 201 also restores to the natural state, the movable contact 61 contacts the fixed contact 62, in this process, the attracting piece 501 attracts the attracted piece 502, the movable contact 61 presses the fixed contact 62, the electric signal is connected, and the water purifier starts to produce water.

[0054] In the embodiment, the pressure change in the water outlet pipe is monitored by the pressure switch, and the automatic control of the water production process of the water purifier is realized. When the user closes the water faucet, the pressure in the pipe rises, the pressure switch cuts off the electric signal and stops water production; when the user opens the water faucet, the pressure in the pipe decreases, the pressure switch connects the electric signal and starts water production. The automatic control of the water production operation can avoid wasting energy when water is not needed, improve the energy efficiency of the water purifier, reduce the working load of the water purifier by avoiding unnecessary water production operation, thereby prolonging the service life of the equipment, automatically cutting off the power supply when the pressure is too high to prevent equipment damage or safety accidents caused by excessive pressure, and the pressure switch can quickly respond to pressure changes and cut off or connect the power supply in time to ensure the immediate response of the water purifier.

[0055] It is easy for those skilled in the art to understand that the above advantageous modes can be freely combined and superimposed without conflict.

[0056] The above is only a preferred embodiment of the present application and does not limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only a preferred embodiment of the present application, and it should be pointed out that those skilled in the art can make several improvements and modifications without departing from the technical principles of the present application, and these improvements and modifications shall be regarded as the protection scope of the present application.

Claims

1. A pressure switch characterized by, The utility model relates to a pressure switch, including: The shell (1) has installation cavity (101) in, the first end (31) of first plug -wire terminal (3) and the first end (41) of second plug -wire terminal (4) enter into installation cavity (101), the second end (32) of first plug -wire terminal (3) and the second end (42) of second plug -wire terminal (4) stretch out shell (1); The spring piece assembly (2) includes spring leaf (201) and push rod (202), one end of spring leaf (201) is connected with the first end (31) of first plug -wire terminal (3), the other end of spring leaf (201) is provided with dynamic contact (61), the first end (41) of second plug -wire terminal (4) is provided with static contact (62), static contact (62) is installed on shell (1), and dynamic contact (61) and static contact (62) are oppositely arranged; The attraction assembly (5) includes attraction piece (501) and attracted piece (502), the attracted piece (502) is installed on dynamic contact (61) or is installed on shell (1), the attraction piece (501) is arranged on static contact (62), one end of push rod (202) is connected with the middle part of spring leaf (201), the other end of push rod (202) stretches out shell (1), push rod (202) is movably arranged along the axis of installation cavity (101), so that dynamic contact (61) is away from static contact (62) or is connected with static contact (62). The attraction piece (501) is a magnet, and the attracted piece (502) is an iron sheet.

2. The pressure switch according to claim 1, characterized in that The attracted piece (502) is arranged on the end surface of the dynamic contact (61) away from the static contact (62), the bottom of the attraction piece (501) is connected with the shell (1), and the top of the attraction piece (501) is provided with the static contact (62).

3. The pressure switch of claim 2, wherein, The attraction piece (501) is an electromagnetic coil, the attracted piece (502) is an electromagnet, the attracted piece (502) is arranged on the end surface of the dynamic contact (61) away from the static contact (62), the bottom of the attraction piece (501) is connected with the shell (1), and the top of the attraction piece (501) is provided with the static contact (62).

4. The pressure switch of claim 1, wherein The pressure switch further comprises a connecting rod (7), a first end (71) of the connecting rod (7) is connected with the shell (1), a second end (72) of the connecting rod (7) is provided with an inlet and outlet (702), an inner cavity of the connecting rod (7) has a medium passage (701), the medium passage (701) communicates with the inlet and outlet (702), and an end of the push rod (202) away from the spring leaf (201) enters the medium passage (701).

5. The pressure switch according to any one of claims 1 to 4, characterized in that ​ 6. The pressure switch of claim 5, wherein, The shell (1) is further provided with a pushing assembly (8), the pushing assembly (8) comprises a diaphragm (801) and a pressing plate (802), one end surface of the diaphragm (801) is connected with the first end (71) of the connecting rod (7), the other end surface of the diaphragm (801) is connected with the pressing plate (802), the diaphragm (801) divides the medium passage (701) into the first chamber (73) and the second chamber (74) which are isolated from each other, and one end of the push rod (202) away from the reed (201) extends into the first chamber (73) and is connected with the diaphragm (801).

7. The pressure switch of claim 6, wherein, The shell (1) is provided with a bottom plate (9), the mounting cavity (101) is formed between the shell (1) and the bottom plate (9), the suction member (501) is arranged in the bottom plate (9), the bottom plate (9) is connected with the pressing plate (802), the first through hole (901) is arranged on the bottom plate (9), the second through hole (821) is arranged on the pressing plate (802), the push rod (202) sequentially passes through the first through hole (901) and the second through hole (821) and is connected with the diaphragm (801).

8. The pressure switch of claim 7, wherein, The diameter of the first through hole (901) is smaller than the diameter of the second through hole (821), and the sealing member is arranged at the first through hole (901).

9. A water purifier comprising a pressure switch, characterized in that, The pressure switch is the pressure switch in any one of claims 1 to 8.

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