Flow switch and central air conditioning water system

Abstract

The present invention discloses a flow switch and a central air conditioning water system, which relate to the field of air conditioning and are used to optimize the structure of the flow switch. The flow switch includes a mounting seat, a target piece and a magnetic assembly. The mounting seat includes a cylinder and an end cover, the cylinder includes an inner cavity with an opening, and the end cover is arranged at the opening and is configured to block the inner cavity. The target piece includes a target piece body and a connecting portion, the target piece body is located outside the inner cavity; the first end of the connecting portion is fixed to the edge of the target piece body, and the second end of the connecting portion is located in the inner cavity; the portion of the connecting portion between the first end and the second end is rotatably connected to the end cover; the target piece is configured to switch between a cut-off state and a conducting state. The magnetic assembly includes a first magnetic part and a second magnetic part, the first magnetic part is installed in the inner cavity, and the second magnetic part is installed at the second end of the connecting portion. The above technical scheme enables the flow switch to adapt to water flow in any direction.

Description

Technical Field

[0001] The invention relates to the field of air conditioning, and in particular to a flow switch and a central air conditioning water system. Background Art

[0002] At present, the central air conditioning water system is equipped with a flow switch (hereinafter referred to as the flow switch) to detect the water flow of the water side system. The flow switch outputs an on-off signal to the whole machine according to the actual water flow of the system to ensure the reliable use of the unit and prevent problems such as damage to components and poor use of the unit due to lack of water.

[0003] In the related technology, the target plate of the flow switch is inserted into the system pipeline to detect the water flow. When the water flow is large enough, the flow switch outputs a "pass" signal and the unit operates normally. When the system water flow is small, the flow switch outputs a water shortage signal and the unit shuts down. Here, the target plate is mainly pushed by the water flow to activate the flow switch.

[0004] The inventors have found that the prior art has at least the following problem: the fluid resistance of the flow switch during use is too large. Summary of the invention

[0005] The present invention provides a flow switch and a central air-conditioning water system, which are used to optimize the structure of the flow switch.

[0006] An embodiment of the present invention provides a flow switch, including:

[0007] The mounting seat comprises a cylinder and an end cover, wherein the cylinder comprises an inner cavity with an opening, and the end cover is arranged at the opening and is configured to block the inner cavity;

[0008] A target piece, comprising a target piece body and a connecting portion, wherein the target piece body is located outside the inner cavity; a first end of the connecting portion is fixed to an edge of the target piece body, and a second end of the connecting portion is located in the inner cavity; a portion of the connecting portion between the first end and the second end is rotatably connected to the end cap; and the target piece is configured to switch between an off state and an on state; and

[0009] The magnetic component includes a first magnetic component and a second magnetic component, wherein the first magnetic component is installed in the inner cavity and the second magnetic component is installed at the second end of the connecting portion; the first magnetic component and the second magnetic component are constructed to use magnetic force to make the target sheet in an original state in a cut-off state.

[0010] In some embodiments, when the target piece is rotated relative to the actuator along a first direction and a second direction at a set angle, the target piece is in a conducting state; the first direction and the second direction are opposite.

[0011] In some embodiments, the first magnetic member includes two groups, and the second magnetic member is located between the two groups of the first magnetic members, so that the target piece rotates along the first direction at a set angle relative to the actuator, and the second magnetic member is close to one group of the first magnetic members, and the target piece rotates along the second direction at a set angle relative to the actuator, and the second magnetic member is close to the other group of the first magnetic members.

[0012] In some embodiments, the flow switch further comprises:

[0013] A target piece position detection component is installed on the actuator and / or the target piece, and the target piece position detection component is configured to detect whether the target piece is in a conducting state.

[0014] In some embodiments, the target position detection component includes:

[0015] First detection elements are arranged in pairs, the first detection elements and the first magnetic members are installed in the inner cavity in a one-to-one correspondence; the two first detection elements in each pair are electrically connected; and

[0016] A second detection element is mounted on the target piece in a one-to-one correspondence with the second magnetic member, and the first detection element and the second detection element are configured to detect whether the target piece is in a conducting state through an electrical signal;

[0017] Wherein, when the target piece is in a conducting state, the first detection element is in contact with the second detection element for electrical conduction.

[0018] In some embodiments, the target pieces are arranged in pairs, each of the target pieces is respectively installed with a second magnetic member and a second detection element, and the second detection element on one of the target pieces is electrically connected to a first wire, and the second detection element on the other target piece is electrically connected to a second wire; the first wire is electrically connected to one of the positive and negative poles of a power supply, and the second wire is electrically connected to the other of the positive and negative poles of the power supply.

[0019] In some embodiments, the first detection element and / or the second detection element include conductive terminals.

[0020] In some embodiments, the first detection elements include two groups; wherein, when the target piece rotates a set angle along a first direction relative to the actuator, the second detection elements contact and conduct electricity with one group of the first detection elements; when the target piece rotates a set angle along a second direction relative to the actuator, the second detection elements contact and conduct electricity with another group of the first detection elements.

[0021] In some embodiments, a side of the target sheet body facing the connecting portion is configured to be concave to avoid the wall of the cylinder.

[0022] In some embodiments, the connecting portion is configured to be rod-shaped, and the surface of the target sheet body is configured to be arched; the connecting portion is parallel to the diameter direction of the target sheet body.

[0023] In some embodiments, a protrusion is disposed on the surface of the target sheet body, and the protrusion includes an arc-shaped surface protruding from the surface of the target sheet body.

[0024] In some embodiments, the mount further comprises:

[0025] a valve body, the end cover being fixed to the valve body; and

[0026] The fastener is sleeved on the valve body, and the valve body is constructed to be detachably connected to the installation joint of the water pipe.

[0027] An embodiment of the present invention further provides a central air conditioning water system, comprising a flow switch provided by any technical solution of the present invention.

[0028] The flow switch provided by the above technical solution has a target plate that can rotate relative to the mounting seat. When the target plate is in a conducting state, the flow area of ​​the water pipe occupied by the target plate is small, which reduces the water resistance generated by the target plate and reduces water flow noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0030] Figure 1 A front view schematic diagram of a flow switch provided by an embodiment of the present invention installed on a water pipe in a cut-off state;

[0031] Figure 2 A side cross-sectional schematic diagram of a flow switch provided by an embodiment of the present invention installed on a water pipe in a cut-off state;

[0032] Figure 3 A front view schematic diagram of a flow switch provided by an embodiment of the present invention installed on a water pipe in a conducting state;

[0033] Figure 4 A side cross-sectional schematic diagram of a flow switch provided by an embodiment of the present invention installed on a water pipe in a conducting state;

[0034] Figure 5 A schematic diagram of an exploded view of a flow switch provided by an embodiment of the present invention;

[0035] Figure 6 A three-dimensional partial schematic diagram of a target plate when the flow switch provided by an embodiment of the present invention is in a cut-off state;

[0036] Figure 7 A schematic front view of a target plate when the flow switch provided by an embodiment of the present invention is in a cut-off state;

[0037] Figure 8 A three-dimensional partial schematic diagram of a target plate when the flow switch provided by an embodiment of the present invention is in a conducting state;

[0038] Figure 9a A three-dimensional schematic diagram of a target sheet of a flow switch provided in an embodiment of the present invention;

[0039] Figure 9b A schematic top view of a target sheet of a flow switch provided in an embodiment of the present invention;

[0040] Fig.10a A schematic cross-sectional view in the main view direction of the cylinder of the mounting base of the flow switch provided by an embodiment of the present invention;

[0041] Fig.10b A schematic cross-sectional view in the side direction of the cylinder of the mounting base of the flow switch provided by an embodiment of the present invention;

[0042] Fig.10c A schematic top view of the cylinder of the mounting base of the flow switch provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0043] Combine the following Figure 1 to Figure 10c The technical solution provided by the present invention is described in more detail.

[0044] The flow switch is used in the pipeline to monitor the flow of water and other fluids in the water system. Furthermore, the flow switch can also trigger an output alarm signal to the unit when the water flow is higher or lower than the set value to avoid or reduce the "dry burning" phenomenon of the host.

[0045] See also Figures 1 to 6 An embodiment of the present invention provides a flow switch, including a mounting seat 1, a target piece 2 and a magnetic component 3.

[0046] See also Figures 1 to 5 The mounting base 1 includes a cylinder 11 and an end cover 12. The cylinder 11 includes an inner cavity 13 with an opening. The end cover 12 is disposed at the opening and is configured to block the inner cavity 13. The magnetic component 3 is mounted inside the inner cavity 13 through the opening.

[0047] The cylinder 11 and the end cover 12 of the mounting base 1 form a closed space. After the flow switch is installed on the water pipe 5, the target piece 2 is located in the water in the water pipe 5. The water in the water pipe 5 will not enter the inner cavity 13 of the cylinder 11. The magnetic component 3 and the target piece position detection component 4 described later are both installed in the inner cavity 13. The mounting base 1 is the installation base for other components of the flow switch.

[0048] See also Figures 1 to 4 The flow switch is installed on the installation joint 51 of the water pipe 5. In order to make the flow switch conveniently fixedly connected to the installation joint of the water pipe, see Figure 5 The mounting seat 1 further includes a valve body 14 and a fastener 15. The valve body 14 has an end 141 and a connecting rod 142, which are fixed together. The connecting rod 142 is slender. The end cover 12 is fixed to the valve body 14, specifically, the end cover 12 is fixed to the connecting rod 142. The fastener 15 is a cylinder with an internal thread, and the fastener 15 has a through hole 151 for sleeve-mounting the connecting rod, through which the fastener 15 is sleeved on the outside of the connecting rod of the valve body 14. The valve body 14 is constructed to be detachably connected to the mounting joint of the water pipe, specifically, the detachable connection is achieved through the internal thread of the fastener 15 and the external thread of the mounting joint.

[0049] Continue to see Figure 5 The target sheet 2 includes a target sheet body 21 and a connecting portion 22, and the target sheet body 21 is located outside the inner cavity 13. The first end of the connecting portion 22 is fixed to the edge of the target sheet body 21, and the second end of the connecting portion 22 is located in the inner cavity 13. During the rotation of the target sheet body 21, the connecting portion 22 will be driven to rotate synchronously. The portion of the connecting portion 22 between the first end and the second end is rotatably connected to the end cap 12 so as to be freely rotatable. The target sheet 2 is configured to switch between a cut-off state and a conducting state. Figure 1 and Figure 2 The position of the target piece 2 in the cut-off state is shown. Figure 3 and Figure 4 The position of the target piece 2 in the on state is indicated.

[0050] The target piece 2 is one of the key components of the flow switch that blocks the water flow. By switching the position of the target piece 2, the flow switch can perform two functions: stopping the water flow and allowing the water flow to pass normally. In the above technical scheme, the target piece 2 is rotatably connected relative to the end cover 12 so as to be freely rotatable, that is, the rotation of the target piece 2 is free. In some embodiments, the target piece 2 can be rotated 90° along the first direction and 90° along the second direction relative to the end cover 12 to meet the functional requirements. The first direction and the second direction are opposite. The first direction is, for example, clockwise rotation, and the second direction is, for example, counterclockwise rotation. When the target piece 2 rotates 90° clockwise, the target piece 2 is in the on state, that is, the flow switch allows water to flow through. When the target piece 2 rotates 90° counterclockwise, the target piece 2 is in the off state, that is, the flow switch does not allow water to flow through.

[0051] See also Figure 1 and Figure 2 In some embodiments, the conduction state includes two positions; wherein, when the target piece 2 rotates relative to the mounting base 1 along any direction of the first direction W1 and the second direction W2 to a set angle, the target piece 2 is in the conduction state; the first direction W1 and the second direction W2 are opposite. In other words, the installation of the flow switch is not restricted by direction, and the flow switch can function normally regardless of the direction of the water flow. The set angle is, for example, 88° to 92°, specifically, 90°. Figure 2 Taking the reverse direction as an example, the arrow indicates the direction of water flow, that is, the flow switch will be turned on if the water flow flows from right to left; if the water flow direction changes to flow from left to right, the flow switch will also be turned on. If the target sheet 2 is located in other positions other than the above two positions, the flow switch is considered to be in the off state.

[0052] See also Figure 1 , Figure 4 and Figure 5 In some embodiments, the side of the target body 21 facing the connecting portion 22 is constructed to be concave to avoid the wall of the cylinder 11. The concave part plays a role of avoidance, so that the target body 21 can rotate normally. After the target 2 is installed in place. In some embodiments, the connecting portion 22 is constructed to be rod-shaped, and the surface of the target body 21 is constructed to be arched. The connecting portion 22 is parallel to the diameter direction of the target body 21.

[0053] See also Figure 1 , Figure 4 and Figure 5 , or see Figure 9a and Figure 9bIn some embodiments, a protrusion 23 is provided on the surface of the target sheet body 21, and the protrusion 23 includes an arc-shaped surface protruding from the surface of the target sheet body 21. The target sheet body 21 includes two surfaces, each of which is provided with a protrusion 23, which also makes the surface area of ​​the target sheet body 21 larger, and the contact surface between the water flow and the target sheet body 21 larger. And the protrusion 23 can also guide the fluid. In addition, the protrusion 23 is provided so that when the fluid flows from the upstream side of the target sheet body 21 to the downstream side, the fluid flows more smoothly on the downstream side of the target sheet body 21 and is not easy to generate noise. The size of the protrusion 23 is not greater than the diameter of the actuator, and the position and number of the protrusion 23 are set according to actual needs.

[0054] See also Figures 5 to 8 The magnetic assembly 3 includes a first magnetic member 31 and a second magnetic member 32. The first magnetic member 31 is installed in the inner cavity 13, and the second magnetic member 32 is installed at the second end of the connecting portion 22. The first magnetic member 31 and the second magnetic member 32 are constructed to use magnetic force to make the target sheet 2 in the cut-off state in the original state.

[0055] The function of the magnetic component 3 is to keep the target piece 2 in the cut-off state, specifically, to keep the target piece 2 in the cut-off state by using magnetic force. The first magnetic member 31 and the second magnetic member 32 of the magnetic component 3 have the same magnetic poles, and use the magnetic force of like poles repelling each other to keep the target piece 2 in the cut-off state without external force, that is, to keep the first magnetic member 31 and the second magnetic member 32 in the separated position. When the target piece 2 is pushed by the water flow, Figure 1 Taking the direction shown as an example, if the water flows from left to right, when the driving force of the water flow is sufficient to overcome the magnetic force, the target piece 2 will rotate 90° from the cut-off state to the on state. If the driving force of the water flow is not sufficient to overcome the magnetic force, the target piece 2 may rotate a certain angle from the cut-off state, but will not rotate to the on state.

[0056] See also Figures 6 to 8 In some embodiments, the first magnetic member 31 includes two groups, and the second magnetic member 32 is located between the two groups of first magnetic members 31, so that the target piece 2 rotates relative to the mounting base 1 along the first direction at a set angle, and the second magnetic member 32 is close to one group of first magnetic members 31, and the target piece 2 rotates relative to the mounting base 1 along the second direction at a set angle, and the second magnetic member 32 is close to the other group of first magnetic members 31. The two groups of first magnetic members 31 together play the role of keeping the target piece 2 in the cut-off state in the original state, because there are repulsive magnetic forces on both sides of the target piece 2, and the magnetic forces on both sides of the target piece 2 are the same in magnitude and opposite in direction, so no matter the target piece 2 can be kept in the middle of the two groups of first magnetic members 31, that is, kept in the cut-off state.

[0057] See also Figures 7 and 8In some embodiments, the flow switch further includes a target position detection component 4, which is mounted on the mounting base 1 and / or the target 2, and is configured to detect whether the target 2 is in a conducting state. The target position detection component 4 can be detected by a position sensor or other methods.

[0058] See also Figures 7 to 10c In some embodiments, the target position detection assembly 4 includes a first detection element 41 and a second detection element 42. The first detection element 41 is arranged in pairs, such as Figure 8 As shown, two pairs of first detection elements 41 are fixed on the inner wall of the inner cavity 13. Each pair includes two first detection elements 41. The first detection elements 41 and the first magnetic members 31 are installed in the inner cavity 13 in a one-to-one correspondence. That is, four first magnetic members 31 are also installed in the inner cavity 13. The two first detection elements 41 in each pair are electrically connected, and the electrical connection can be achieved by connecting the wires 40, as shown in FIG. Fig.10c As shown. The second detection element 42 and the second magnetic member 32 are mounted on the target sheet 2 in a one-to-one correspondence, and the first detection element 41 and the second detection element 42 are configured to detect whether the target sheet 2 is in a conductive state through an electrical signal. When the target sheet 2 is in a conductive state, the first detection element 41 and the second detection element 42 are in contact and conductive.

[0059] See also Figures 1 to 7 In some embodiments, the target pieces 2 are arranged in pairs, each of which is respectively provided with a second magnetic member 32 and a second detection element 42, and the second detection element 42 on one of the target pieces 2 is electrically connected to a first wire 43, and the second detection element 42 on the other target piece 2 is electrically connected to a second wire 44; the first wire 43 is electrically connected to one of the positive and negative electrodes of the power supply, and the second wire 44 is electrically connected to the other of the positive and negative electrodes of the power supply. When forming a loop: the positive electrode (or negative electrode) of the external power supply, the first wire 43, the second detection element 42 on one of the target pieces 2, one of the pair of first detection elements 41, the connecting wire 40, the other of the pair of first detection elements 41, the second detection element 42 on the other target piece 2, the second wire 44, and the negative electrode (or positive electrode) of the external power supply form a closed loop, and at this time there is an electrical signal in the loop, which indicates that the target piece 2 has rotated to the on state. If there is no electrical signal in the loop, it means that the loop is not on, and it also means that the target piece 2 is not in the on state. It can be seen that whether the target sheet 2 is in the conducting state can be detected by detecting whether there is an electrical signal in the circuit.

[0060] In some embodiments, the first detection element 41 and / or the second detection element 42 include a conductive terminal. The conductive terminal can be made of a material with good conductive properties, such as a metal material.

[0061] As described above, no matter which direction the target sheet 2 rotates, the target sheet 2 can be switched from the cut-off state to the on state. When the rotation direction of the target sheet 2 is different, the position of the connecting portion 22 of the target sheet 2 after rotation is also different. In some embodiments, the first detection element 41 includes two groups; wherein, when the target sheet 2 rotates a set angle along the first direction W1 relative to the mounting seat 1, the second detection element 42 contacts and conducts electricity with one group of the first detection elements 41; when the target sheet 2 rotates a set angle along the second direction W2 relative to the mounting seat 1, the second detection element 42 contacts and conducts electricity with another group of the first detection elements 41. The above technical solution conducts the electrical circuit by contacting the second detection element 42 with the first detection element 41, thereby accurately judging whether the flow switch is in the on state.

[0062] An embodiment of the present invention further provides a central air conditioning water system, comprising a flow switch provided by any technical solution of the present invention.

[0063] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection content of the present invention.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flow switch, characterized in that: include: A mounting seat (1) comprising a cylinder (11) and an end cover (12), wherein the cylinder (11) comprises an inner cavity (13) with an opening, and the end cover (12) is arranged at the opening and is configured to seal the inner cavity (13); A target piece (2) comprises a target piece body (21) and a connecting portion (22), wherein the target piece body (21) is located outside the inner cavity (13); a first end of the connecting portion (22) is fixed to an edge of the target piece body (21), and a second end of the connecting portion (22) is located in the inner cavity (13); a portion of the connecting portion (22) between the first end and the second end is rotatably connected to the end cap (12); the target piece (2) is configured to switch between an off state and an on state; and The magnetic component (3) comprises a first magnetic component (31) and a second magnetic component (32), wherein the first magnetic component (31) is installed in the inner cavity (13), and the second magnetic component (32) is installed at the second end of the connecting portion (22); the first magnetic component (31) and the second magnetic component (32) are configured to use magnetic force to make the target sheet (2) in an original state in a cut-off state.

2. The flow switch according to claim 1, characterized in that: When the target piece (2) is rotated relative to the mounting seat (1) by a set angle along any one of a first direction and a second direction, the target piece (2) is in a conducting state; the first direction and the second direction are opposite.

3. The flow switch according to claim 1, characterized in that: The first magnetic member (31) comprises two groups, and the second magnetic member (32) is located between the two groups of the first magnetic members (31), so that the target piece (2) rotates at a set angle along a first direction relative to the mounting seat (1), and the second magnetic member (32) is close to one group of the first magnetic members (31); the target piece (2) rotates at a set angle along a second direction relative to the mounting seat (1), and the second magnetic member (32) is close to the other group of the first magnetic members (31).

4. The flow switch according to claim 1, characterized in that: Also includes: A target piece position detection component (4) is mounted on the mounting seat (1) and / or the target piece (2), and the target piece position detection component (4) is configured to detect whether the target piece (2) is in a conducting state.

5. The flow switch according to claim 4, characterized in that: The target piece position detection component (4) comprises: The first detection elements (41) are arranged in pairs, and the first detection elements (41) and the first magnetic elements (31) are installed in the inner cavity (13) in a one-to-one correspondence; the two first detection elements (41) in each pair are electrically connected; and a second detection element (42) mounted on the target piece (2) in a one-to-one correspondence with the second magnetic element (32), the first detection element (41) and the second detection element (42) being configured to detect whether the target piece (2) is in a conducting state through an electrical signal; Wherein, when the target sheet (2) is in a conducting state, the first detection element (41) and the second detection element (42) are in contact and conduct electricity.

6. The flow switch according to claim 5, characterized in that: The target pieces (2) are arranged in pairs, each of the target pieces (2) is respectively installed with a second magnetic member (32) and a second detection element (42), and the second detection element (42) on one of the target pieces (2) is electrically connected to a first wire, and the second detection element (42) on the other target piece (2) is electrically connected to a second wire; the first wire is electrically connected to one of the positive and negative electrodes of a power supply, and the second wire is electrically connected to the other of the positive and negative electrodes of the power supply.

7. The flow switch according to claim 5, characterized in that: The first detection element (41) and / or the second detection element (42) comprises a conductive terminal.

8. The flow switch according to claim 5, characterized in that: The first detection elements (41) include two groups; when the target piece (2) rotates by a set angle along a first direction relative to the mounting seat (1), the second detection elements (42) contact and conduct electricity with one group of the first detection elements (41); and when the target piece (2) rotates by a set angle along a second direction relative to the mounting seat (1), the second detection elements (42) contact and conduct electricity with the other group of the first detection elements (41).

9. The flow switch according to claim 1, characterized in that: The side of the target sheet body (21) facing the connecting portion (22) is constructed to be concave so as to avoid the wall of the cylinder (11).

10. The flow switch according to claim 1, characterized in that: The connecting portion (22) is configured to be rod-shaped, and the surface of the target sheet body (21) is configured to be arched; the connecting portion (22) is parallel to the diameter direction of the target sheet body (21).

11. The flow switch according to claim 10, characterized in that: The surface of the target sheet body (21) is provided with a protrusion (23), and the protrusion (23) comprises an arc-shaped surface protruding from the surface of the target sheet body (21).

12. The flow switch according to claim 1, characterized in that: The mounting seat (1) further comprises: a valve body (14), the end cover (12) being fixed to the valve body (14); and The fastener (15) is sleeved on the valve body (14); the valve body (14) is configured to be detachably connected to a mounting joint of a water pipe.

13. A central air conditioning water system, characterized in that: It comprises the flow switch described in any one of claims 1 to 12.

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