Adjustable flow constant temperature heating valve

Abstract

The present invention relates to an adjustable flow thermostatic air valve. A horizontally arranged valve seat is provided in the valve body. The valve seat is provided with a central through hole. The lower chamber of the valve body is connected to the medium inlet of the valve body. A valve core and a valve core sleeve are provided in the upper chamber of the valve body. The valve core sleeve is fixedly and sealedly connected to the inner wall of the upper chamber. An annular gap is left between the outer wall of the lower portion and the inner wall of the upper chamber. The annular gap is connected to the medium outlet. The valve core sleeve is provided with a valve core sleeve outlet connected to the annular gap. The valve core is coaxially arranged in the valve core sleeve and rotatably seals with the valve core sleeve. The bottom of the valve core is provided with a valve core chamber connected to the central through hole. The valve core is provided with a valve core outlet for connecting the valve core chamber with the valve core sleeve outlet. The upper and lower widths of the valve core outlet gradually change along the circumference of the valve core. The opening and closing and flow regulation of the present invention are controlled by a single motion mode of different components, which not only helps to improve the accuracy of valve flow regulation, but also is less likely to cause leakage or malfunction.

Description

Technical Field

[0001] The invention relates to a flow-adjustable constant-temperature warm air valve, belonging to the technical field of valves. Background Art

[0002] A traditional heating valve includes a valve body, which is provided with a valve cavity connecting the inlet and outlet at both ends, and a valve seat is provided in the valve cavity. The valve seat is usually arranged horizontally, and its central through hole constitutes the necessary passage for the medium. A valve disc is provided above the valve seat, and the valve disc and the valve seat constitute a valve sealing pair. The valve disc is connected to a valve stem, which is driven by the valve stem to move it up and down to realize the opening, closing and adjustment of the valve opening. For heating systems or other domestic water systems, the valve disc is usually composed of a hard valve disc seat and a rubber sealing gasket embedded in the valve disc seat, or only of a rubber sealing gasket. When the rubber sealing gasket contacts and presses the sealing surface of the valve seat, the valve is closed. When the rubber sealing gasket is away from the valve seat, the medium is able to pass through the gap between the valve seat and the rubber sealing gasket, and the valve is opened. The distance between the valve seat sealing surface and the rubber sealing gasket reflects the opening of the valve, determines the flow area and resistance at the sealing pair, and thus affects the flow rate of the valve.

[0003] This type of valve uses the valve stem to drive the valve disc up and down to achieve the opening, closing and opening adjustment of the valve. During the process of opening, closing and opening adjustment of the valve, the valve stem needs to move axially and rotate relative to the valve body (two modes of movement at the same time), which places very high requirements on the sealing of the valve stem on the valve body and the processing of related components. In actual application, it is very easy for the related seals to fail or be damaged due to the frequent movement of the valve stem relative to the valve body, resulting in valve leakage or malfunction. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an adjustable flow thermostatic air valve. The opening and closing and flow regulation of the valve are controlled by single motion modes of different components respectively, which not only helps to improve the accuracy of valve flow regulation, but also is less likely to leak or malfunction.

[0005] The technical solution for achieving the above-mentioned purpose of the present invention is: an adjustable flow constant temperature air valve, comprising a valve body, the valve body being provided with a medium inlet (or inlet cavity) and a medium outlet (or outlet cavity), the valve body being provided with a valve seat, the valve seat being arranged horizontally, dividing the valve cavity in the valve body into an upper cavity and a lower cavity, the valve seat being provided with a central through hole for connecting the upper cavity and the lower cavity, the lower cavity being communicated with the medium inlet, the upper cavity being provided with a valve core and a valve core jacket, the valve core jacket being fixedly and sealedly connected to the inner wall of the upper cavity, an annular gap being left between the outer wall of its lower portion and the inner wall of the upper cavity, the annular gap being communicated with the medium outlet, and the like. The bottom end of the valve core sleeve is sealed with the valve seat, and the valve core sleeve is provided with a valve core sleeve outlet connected with the annular gap. The valve core is coaxially arranged in the valve core sleeve and rotates and seals with the valve core sleeve. The bottom end of the valve core is sealed with the valve seat, and the bottom of the valve core is provided with a valve core cavity connected with the central through hole. The valve core is provided with a valve core outlet for connecting the valve core cavity with the valve core sleeve outlet, and the upper and lower widths of the valve core outlet gradually change along the circumference of the valve core. The top end of the valve core sleeve is provided with an adjusting member connected to the valve core, and the adjusting member rotates and cooperates with the inner wall of the valve core sleeve.

[0006] Preferably, the valve core housing outlet is a rectangular opening, the valve core housing outlet corresponds laterally (or horizontally) to the annular gap, and the vertical width of the valve core housing outlet is no greater than (preferably less than) the vertical width of the annular gap. The valve core outlet corresponds laterally (or horizontally) to the valve core housing outlet, and the maximum vertical width of the valve core outlet is less than the vertical width of the valve core housing outlet.

[0007] The lowest point of the lower edge of the valve core outlet is flush with the lower edge of the valve core housing outlet, or the highest point of the upper edge of the valve core outlet is flush with the upper edge of the valve core housing outlet, or the highest point of the upper edge of the valve core outlet is lower than the upper edge of the valve core housing outlet, and the lowest point of the lower edge of the valve core outlet is higher than the lower edge of the valve core housing outlet.

[0008] The upper and lower widths of the valve core outlet can change linearly, that is, the upper and lower edges of the valve core outlet are oblique straight edges or arc-shaped edges, or the upper and lower edges of the valve core outlet are a combination of oblique straight edges or arc-shaped edges and straight edges. The upper and lower widths of the valve core outlet can also change in a step-like manner, that is, the upper and lower edges of the valve core outlet are step-shaped edges, or the upper and lower edges of the valve core outlet are a combination of step-shaped edges and oblique straight edges or arc-shaped edges.

[0009] Preferably, the maximum flow area of the valve core outlet communicating with the valve core housing outlet is smaller than the flow area of the valve core cavity communicating with the central through hole.

[0010] Preferably, a valve flap is provided in the valve core cavity, the valve flap is installed at the lower end of the valve stem, the valve core is provided with an axial hole, the valve stem is coaxially located in the axial hole of the valve core, the top end of the valve stem is located outside the valve body (extending upward outside the valve body), and the valve flap and the valve seat constitute the main sealing pair (opening and closing sealing pair) of the valve.

[0011] The valve disc can be composed of a hard valve disc seat and a rubber sealing gasket embedded in the valve disc seat, or it can be composed of only a rubber sealing gasket. The valve disc and the regulating core outlet on the top cover form a sealing pair for opening and closing the valve. To facilitate the sealing between the valve disc and the regulating core outlet, the top wall of the top cover can be provided with a tapered surface with an inner diameter that gradually decreases from top to bottom.

[0012] Preferably, a spring is sleeved on the valve stem, and the spring is located in the axial hole of the valve core. The bottom end of the axial hole of the valve core is provided with an annular flange extending inward, and the valve stem and the inner wall of the annular flange are slidingly sealed. A retaining ring (or a retaining ring) is fixedly provided in the middle of the valve stem, and the bottom end of the spring rests on the annular flange, and the top end of the spring rests on the retaining spring.

[0013] Preferably, a radially inward annular groove is provided in the middle of the valve stem, the retaining ring is horizontally embedded in the annular groove, and the outer edge of the retaining ring protrudes from the outer wall of the valve stem.

[0014] Preferably, a cylindrical spring sleeve and a clamping cap are provided in the axial hole of the valve core, the clamping cap is located above the spring sleeve, the spring and the retaining ring are located in the spring sleeve, the top end of the spring sleeve is provided with an inwardly protruding annular flange, the bottom end of the spring sleeve rests on the inwardly protruding annular flange at the bottom end of the axial hole of the valve core, the clamping cap is fixedly connected (for example, threadedly connected) to the top end of the axial hole of the valve core, the bottom end of the clamping cap rests on the spring sleeve, and the top end of the clamping cap rests on the adjusting member or leaves a gap between it and the adjusting member.

[0015] Preferably, the adjusting member is in the shape of an inverted cup, and the adjusting member and the valve core can be connected by a threaded connection or a clamping connection. For example, the bottom end of the adjusting member is provided with a flange protruding inward (usually an annular flange), and the top end of the valve core is provided with a groove (usually an annular groove) matching the flange. The flange on the adjusting member is clamped in the groove on the valve core, and a number of inward-protruding protrusions are distributed circumferentially on the inner wall of the adjusting member. The top end of the valve core is provided with a clamping groove matching the number and position of the protrusions, and each protrusion on the adjusting member is respectively clamped in the corresponding clamping groove.

[0016] Preferably, the top end of the regulating member is located outside the valve body.

[0017] Preferably, a protective cap is provided at the top of the valve body, the protective cap is in the shape of an inverted cup, the protective cap is threadedly connected to the valve body, the top of the valve stem rests on the top wall inside the protective cap, and the top outer wall of the protective cap and the adjusting member are provided with a matching snap-fit structure.

[0018] Preferably, a circular groove is provided in the center of the outer wall at the top end of the protective cap, and the clamping structure includes a plurality of inwardly protruding protrusions circumferentially arranged on the groove wall of the circular groove, and a clamping groove corresponding to the number and position of the protrusions provided on the axial outer wall of the adjusting member. After the protective cap is unscrewed from the valve body, the protective cap can be turned over so that the protrusions on it are clamped in the corresponding clamping grooves on the adjusting member. By rotating the protective cap, the valve core can be driven to rotate in the valve core sleeve through the adjusting member.

[0019] The center of the circular groove may be provided with a blind hole for the top end of the valve stem to be inserted into. The top wall inside the protective cap may also be provided with a blind hole for the top end of the valve stem to be inserted into.

[0020] Preferably, a flow scale is provided circumferentially on the side wall of the protective cap. When the protective cap is inverted and engaged with the adjusting member, the flow scale corresponds to different upper and lower width positions of the valve core outlet. The correspondence between the flow scale and different upper and lower width positions of the valve core outlet can be ensured by configuring the protrusions (and corresponding retaining grooves) on the protective cap to have different widths or by configuring adjacent protrusions (and corresponding retaining grooves) to have different spacings. The flow scale corresponds to different upper and lower width positions of the valve core outlet when the protective cap (after inversion) is engaged with the adjusting member.

[0021] A temperature bulb may be fixedly arranged in the protective cap. When the protective cap is mounted on the valve body in a forward direction, the top end of the valve stem abuts against the temperature bulb.

[0022] The beneficial effects of the present invention are:

[0023] (1) Since the flow rate of the valve is adjusted by rotating the valve core to change the flow area between the valve core outlet and the valve core housing outlet, and the flow area between the valve core outlet and the valve core housing outlet is a plane (equivalent to a plane), compared with the traditional heating valve that adjusts the flow rate of the valve by changing the distance between the valve disc and the valve seat (the flow area is an annular surface), the flow rate adjustment of the valve is more precise. After the medium flow rate of the valve is set by the valve core and the valve core housing, the flow rate of the valve can be kept constant.

[0024] (2) Since the opening and closing of the valve and the flow regulation are controlled by different components respectively (the opening and closing of the valve is controlled by the valve stem, and the flow regulation is controlled by the valve core), and when controlling the opening and closing of the valve and the flow regulation, the relevant components only make a single movement (the valve stem only makes axial movement when the valve is opened and closed, and the valve core only rotates relative to the valve core sleeve when regulating the flow), compared with the traditional heating valve, the valve stem moves both axially and rotates when opening and closing and regulating the flow (two movements are performed at the same time), the movement form of the relevant components is single, and it is not easy to leak or malfunction, which can effectively extend the service life of the valve, and can appropriately reduce the sealing requirements and process processing requirements for the relevant components, thereby reducing production costs.

[0025] (3) Due to the internal and external structural settings of the protective cap, when the protective cap is installed on the valve body (threaded on the valve body), the valve can be opened and closed. When the protective cap is installed on the regulating member in reverse (clamped on the regulating member), the flow rate of the valve can be adjusted, which is convenient for the use and control of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural schematic diagram of a working mode of the present invention (the protective cap is mounted on the valve body);

[0027] Figure 2 is a structural schematic diagram of another working mode of the present invention (the protective cap is reversely installed on the adjusting member);

[0028] Figure 3 It is a structural schematic diagram of the valve core housing of the present invention;

[0029] Figure 4 It is a structural schematic diagram of the valve core of the present invention. Implementation Method

[0030] All directional indications (such as up, down, top, bottom, inside, outside, etc.) in the embodiments of the present invention are only used to explain the relative position relationship and movement of the various components in a specific posture (as shown in the accompanying drawings) and do not constitute a limitation on the actual use direction. If the specific posture changes, the directional indication will also change accordingly.

[0031] See also Figure 1-4The present invention discloses an adjustable flow thermostatic air valve, comprising a valve body 1, the valve body being provided with a medium inlet (or inlet cavity) 2 and a medium outlet (or outlet cavity) 3, the valve body being provided with a valve seat 4, the valve seat being arranged horizontally, dividing a valve cavity in the valve body into an upper cavity and a lower cavity, the valve seat being provided with a central through hole for connecting the upper cavity and the lower cavity, the lower cavity being connected to the medium inlet, the upper cavity being connected to the medium outlet, forming a medium channel in the valve body consisting of the medium inlet, the lower cavity, the upper cavity, and the medium outlet. The upper chamber is provided with a coaxially sleeved valve core 5 and a valve core sleeve 6, the valve core sleeve is fixedly sealed to the inner wall of the upper chamber (for example, a threaded connection and provided with a suitable sealing ring), an annular gap (or annular chamber) is left between the outer wall of its lower part and the inner wall of the upper chamber, the annular gap is communicated with the medium outlet, the bottom end of the valve core sleeve is sealed with the valve seat (the bottom end of the valve core sleeve can be against the valve seat), a valve core sleeve outlet 7 communicated with the annular gap is provided on the valve core sleeve, the valve core sleeve outlet is communicated with the medium outlet through the annular gap, and is used for the medium to flow out of the valve body, the valve core is coaxially arranged in the valve core sleeve, and rotates and seals with the valve core sleeve (provided with a suitable sealing ring), so that The valve core is coaxially rotatable relative to the valve core housing. The bottom end of the valve core is sealed against the valve seat (the bottom end of the valve core can abut against the valve seat). The bottom of the valve core is provided with a valve core cavity 8 connected to the central through hole, allowing medium to flow into the valve core cavity through the central through hole. The valve core is provided with a valve core outlet 9 for connecting the valve core cavity with the outlet of the valve core housing. The medium entering the valve core cavity can flow into the medium outlet through the connected valve core outlet and the valve core housing outlet, and ultimately flow out of the valve body. The upper and lower widths of the valve core outlet gradually change along the circumference of the valve core, so that when the valve core is rotated, the flow area between the valve core outlet and the valve core housing outlet can be changed, thereby adjusting the flow rate of the valve. The top end of the valve core housing is provided with an adjusting member 10 connected to the valve core. The adjusting member is rotatably engaged with the inner wall of the valve core housing, allowing the adjusting member to rotate relative to the valve core housing and drive the valve core to rotate together, thereby adjusting the flow rate of the valve.

[0032] The valve core housing outlet is typically a rectangular opening, and the valve core housing outlet corresponds laterally (or horizontally) to the position of the annular gap. The upper and lower widths of the valve core housing outlet are no greater than (preferably less than) the upper and lower widths of the annular gap. The valve core outlet corresponds laterally (or horizontally) to the position of the valve core housing outlet, and the maximum upper and lower widths of the valve core outlet are preferably less than the upper and lower widths of the valve core housing outlet. The lowest point of the lower edge of the valve core outlet is flush with the lower edge of the valve core housing outlet, or the highest point of the upper edge of the valve core outlet is flush with the upper edge of the valve core housing outlet, or the highest point of the upper edge of the valve core outlet is lower than the upper edge of the valve core housing outlet, and the lowest point of the lower edge of the valve core outlet is higher than the lower edge of the valve core housing outlet. With this arrangement, the flow setting and adjustment of the valve are completely dependent on the change in the upper and lower widths of the valve core outlet, which not only facilitates linear adjustment of the valve flow but also helps improve the accuracy of flow regulation.

[0033] The upper and lower widths of the valve core outlet can change linearly, that is, the upper and lower edges of the valve core outlet are oblique straight edges or arc-shaped edges, or the upper and lower edges of the valve core outlet are a combination of oblique straight edges or arc-shaped edges and straight edges. The upper and lower widths of the valve core outlet can also change in a step-like manner, that is, the upper and lower edges of the valve core outlet are step-shaped edges, or the upper and lower edges of the valve core outlet are a combination of step-shaped edges and oblique straight edges or arc-shaped edges.

[0034] Since the flow rate of the valve is adjusted by rotating the valve core to change the flow area between the valve core outlet and the valve core housing outlet, and the flow area between the valve core outlet and the valve core housing outlet is a plane, compared with the traditional heating valve that adjusts the flow rate of the valve by changing the distance between the valve disc and the valve seat (the flow area is an annular surface), the flow rate regulation of the valve is more precise. After the medium flow rate of the valve is set by the valve core and the valve core housing, the flow rate of the valve can be kept constant.

[0035] The maximum flow area between the valve core outlet and the valve core housing outlet is preferably smaller than the flow area between the valve core cavity and the central through hole. Furthermore, the area of the valve core housing outlet is smaller than the flow area between the valve core cavity and the central through hole. With this arrangement, the flow area at the outlet of the valve core cavity is always smaller than the flow area at the inlet. Adjusting the flow area at the outlet of the valve core cavity (the flow area between the valve core outlet and the valve core housing outlet) allows the valve set flow rate to be adjusted, thereby improving the accuracy of flow regulation.

[0036] A valve disc 11 is preferably provided within the valve core cavity and is mounted at the lower end of a valve stem 12. The valve core is provided with an axial hole, and the valve stem is coaxially located within the axial hole of the valve core. The top end of the valve stem is located outside the valve body (extending upward from the valve body). The valve disc can be composed of a hard valve disc seat and a rubber sealing gasket embedded in the valve disc seat, or it can be composed solely of a rubber sealing gasket. The valve disc and the valve seat form a sealing pair for opening and closing the valve. The valve stem moves up and down within the axial hole of the valve core, driving the valve disc away from or toward the valve seat (the extreme position of close proximity is when the valve disc and the valve seat are tightly sealed), thereby opening and closing the valve.

[0037] The valve stem is preferably sleeved with a spring 13. The spring is a cylindrical spring located within the axial bore of the valve core. An inwardly extending annular flange is provided at the bottom end of the axial bore of the valve core. The valve stem and the inner wall of the annular flange form a sliding, sealed fit (provided with a suitable sealing ring). A retaining ring (or retaining ring) 14 is fixedly provided in the middle of the valve stem. The bottom end of the spring abuts against the annular flange (provided with a suitable gasket), and the top end of the spring abuts against the retaining ring. When downward pressure is applied to the valve stem, the stem drives the valve disc downward to seal the central through-hole in the valve seat (the retaining ring moves downward with the stem), closing the valve and compressing the spring. When the downward pressure on the valve stem is removed, the spring's thrust pushes the stem, which in turn pushes the valve disc upward via the retaining ring, opening the valve.

[0038] The middle portion of the valve stem may be provided with a radially inward annular groove, the retaining spring is horizontally embedded in the annular groove, and the outer edge of the retaining spring protrudes from the outer wall of the valve stem.

[0039] The axial hole of the valve core is preferably provided with a cylindrical spring sleeve 15 and a clamping cap 16, the clamping cap is located above the spring sleeve, the spring and the retaining spring are located in the spring sleeve, the top end of the spring sleeve is provided with an inwardly protruding annular flange, the inner wall of the annular flange is clearance-fitted or slidingly fitted with the valve stem, when the valve is opened, the top surface of the retaining spring abuts against the bottom surface of the annular flange (at this time, the spring is provided with or without pre-compression), when the valve is closed, a gap is left between the top surface of the retaining spring and the bottom surface of the annular flange, the bottom end of the spring sleeve abuts against the annular flange protruding inwardly from the bottom end of the axial hole of the valve core, the clamping cap is fixedly connected (for example, threadedly connected) to the top end of the axial hole of the valve core, the bottom end of the clamping cap abuts against the spring sleeve (provided with a suitable sealing ring), the top end of the clamping cap abuts against the adjusting member or leaves a gap between it and the adjusting member, and the inner wall of the clamping cap is clearance-fitted or slidingly fitted with the valve stem. The arrangement of the spring sleeve and the compression cap can limit the upward movement of the valve stem, so that the valve stem moves up and down within a set reasonable range to realize the opening and closing of the valve.

[0040] The adjusting member is preferably in an inverted cup shape. The adjusting member and the valve core can be connected by a threaded or snap-fit connection. For example, the bottom end of the adjusting member is provided with an inwardly projecting flange (typically an annular flange), and the top end of the valve core is provided with a groove (typically an annular groove) that mates with the flange. The flange on the adjusting member engages with the groove on the valve core. Furthermore, the inner wall of the adjusting member is provided with a plurality of inwardly projecting protrusions spaced circumferentially. The top end of the valve core is provided with snap-fit grooves that match the number and position of the protrusions, and each protrusion on the adjusting member engages with a corresponding snap-fit groove. The top end of the adjusting member is preferably located outside the valve body, that is, it extends upward from the valve body. This arrangement allows the adjusting member to be rotated outside the valve body using a tool compatible with the adjusting member. The adjusting member, through which the valve core rotates within the valve core housing, changes the flow area between the valve core outlet and the valve core housing outlet, thereby adjusting the valve flow rate. The adjusting member is provided with a through-hole at the center for the valve stem to pass through.

[0041] Since the opening and closing of the valve and the flow regulation are controlled by different components respectively (the opening and closing of the valve is controlled by the valve stem, and the flow regulation is controlled by the valve core), and when controlling the opening and closing of the valve and the flow regulation, the relevant components only make a single movement (the valve stem only makes axial movement when the valve is opened and closed, and the valve core only rotates relative to the valve core sleeve when adjusting the flow). Compared with the traditional heating valve, the valve stem moves both axially and rotates during opening and closing and flow regulation (two movements at the same time), the movement form of the relevant components is single, and it is not easy to leak or malfunction, which can effectively extend the service life of the valve, and can appropriately reduce the sealing requirements and process processing requirements for related components, thereby reducing production costs.

[0042] The top of the valve body is preferably provided with a protective cap 17, which is in the shape of an inverted cup and is threadedly connected to the valve body. The top of the valve stem rests on the top wall inside the protective cap. With this arrangement, the valve can be opened and closed by rotating the protective cap on the valve body. When the protective cap is rotated to move downward relative to the valve body (usually forward rotation), the protective cap pushes the valve stem downward, and the valve closes. When the protective cap is rotated to move upward relative to the valve body (usually reverse rotation), the distance between the top wall inside the protective cap and the top of the valve body becomes larger, and the valve stem moves upward under the thrust of the spring, and the valve opens.

[0043] The top outer wall of the protective cap is preferably provided with a coupling structure that cooperates with the regulating member. With this arrangement, after the protective cap is unscrewed from the valve body, it can be reversed and then engaged with the regulating member via the coupling structure. By rotating the protective cap, the flow rate of the valve can be adjusted. Thus, when the protective cap is installed upright on the valve body, the valve can be opened and closed, while when the protective cap is installed in reverse on the regulating member, the flow rate of the valve can be adjusted, thereby facilitating the use and control of the valve.

[0044] A preferred embodiment of the snap-fit structure may include: a circular groove is centrally located on the top outer wall of the protective cap; a plurality of inwardly projecting protrusions are circumferentially disposed on the groove wall of the circular groove; and a snap-fit groove is disposed on the axial outer wall of the adjusting member corresponding in number and position to the protrusions. After the protective cap is unscrewed from the valve body, the protective cap is inverted so that the protrusions engage with corresponding slots on the adjusting member. Rotating the protective cap can then drive the valve core within the valve core housing via the adjusting member.

[0045] The center of the circular groove may be provided with a blind hole for the top end of the valve stem to be inserted into. The top wall inside the protective cap may also be provided with a blind hole for the top end of the valve stem to be inserted into.

[0046] The sidewall of the protective cap may be provided with flow scales (or flow level scales) along a circumferential direction. When the protective cap is reversed and engaged with the adjusting member, the flow scales correspond to different upper and lower width positions of the valve core outlet. The circumferential angle at which the protective cap drives the adjusting member to rotate can be determined based on the flow scales on the protective cap, thereby adjusting the flow of the valve for convenient control. The correspondence between the flow scales and different upper and lower width positions of the valve core outlet can be ensured by configuring the protrusions (and corresponding retaining grooves) on the protective cap to have different widths or by providing different spacing between adjacent protrusions (and corresponding retaining grooves) after the protective cap (after inversion) engages with the adjusting member.

[0047] A temperature bag can be fixedly provided in the protective cap. When the protective cap is forwardly mounted on the valve body, the top end of the valve stem rests on the temperature bag. With this arrangement, when the protective cap is forwardly mounted on the valve body (the protective cap can be reversely mounted on the regulating member to adjust the valve flow, and then removed and forwardly mounted on the valve body), the temperature bag can control the up and down movement of the valve stem according to the room temperature, thereby realizing automatic opening and closing of the valve according to the room temperature.

[0048] Unless otherwise specified or one preferred or optional technical means is a further limitation of another technical means, the preferred and optional technical means disclosed in the present invention can be arbitrarily combined to form several different technical solutions.

Claims

1. An adjustable flow constant temperature warming valve, comprising a valve body, wherein the valve body is provided with a medium inlet and a medium outlet, characterized in that A valve seat is provided in the valve body, and the valve seat is arranged horizontally, dividing the valve cavity in the valve body into an upper cavity and a lower cavity. The valve seat is provided with a central through hole for connecting the upper cavity and the lower cavity, and the lower cavity is connected with the medium inlet. A valve core and a valve core sleeve are provided in the upper cavity, and the valve core sleeve is fixedly sealed with the inner wall of the upper cavity. An annular gap is left between the outer wall of its lower part and the inner wall of the upper cavity, and the annular gap is connected with the medium outlet. The bottom end of the valve core sleeve is sealed with the valve seat, and a valve core sleeve outlet connected with the annular gap is provided on the valve core sleeve, and the valve core sleeve outlet is a rectangular port. The valve core is coaxially arranged in the valve core sleeve and rotates and seals with the valve core sleeve. The bottom end of the valve core is sealed with the valve seat, and the bottom of the valve core is provided with a valve core cavity connected with the central through hole. , the valve core is provided with a valve core outlet for connecting the valve core cavity with the valve core sleeve outlet, the upper and lower widths of the valve core outlet gradually change along the circumference of the valve core, the top of the valve core sleeve is provided with an adjusting member connected to the valve core, the adjusting member rotatably cooperates with the inner wall of the valve core sleeve, the valve core cavity is provided with a valve disc, and the valve disc is installed at the lower end of the valve stem, the valve core is provided with an axial hole, the valve stem is coaxially located in the axial hole of the valve core, the top of the valve stem is located outside the valve body, a spring is sleeved on the valve stem, the spring is located in the axial hole of the valve core, the bottom end of the axial hole of the valve core is provided with an annular flange extending inward, the valve stem and the inner wall of the annular flange are slidingly sealed, a retaining spring is fixedly provided at the middle part of the valve stem, the bottom end of the spring is against the annular flange, and the top end of the spring is against the retaining spring.

2. The adjustable flow constant temperature warming valve according to claim 1, characterized in that The maximum flow area of the valve core outlet communicating with the valve core housing outlet is smaller than the flow area of the valve core cavity communicating with the central through hole.

3. The adjustable flow constant temperature warming valve according to claim 2, characterized in that A radially inward annular groove is provided in the middle of the valve stem, and the clamping spring is horizontally embedded in the annular groove. The outer edge of the clamping spring protrudes from the outer wall of the valve stem.

4. The adjustable flow constant temperature warming valve according to claim 3, characterized in that A cylindrical spring sleeve and a clamping cap are provided in the axial hole of the valve core, the clamping cap is located above the spring sleeve, the spring and the retaining ring are located in the spring sleeve, the top end of the spring sleeve is provided with an inwardly protruding annular flange, the bottom end of the spring sleeve rests on the inwardly protruding annular flange at the bottom end of the axial hole of the valve core, the clamping cap is fixedly connected to the top end of the axial hole of the valve core, the bottom end of the clamping cap rests on the spring sleeve, and the top end of the clamping cap rests on the adjusting member or leaves a gap between it and the adjusting member.

5. The adjustable flow constant temperature warming valve according to any one of claims 1 to 4, characterized in that The top end of the regulating member is located outside the valve body.

6. The adjustable flow constant temperature warming valve according to claim 5, characterized in that A protective cap is provided at the top of the valve body, which is in the shape of an inverted cup and is threadedly connected to the valve body. The top of the valve stem rests on the top wall inside the protective cap, and a matching clamping structure is provided on the outer wall of the top of the protective cap and the adjusting member.

7. The adjustable flow constant temperature warming valve according to claim 6, characterized in that A circular groove is provided at the center of the outer wall of the top end of the protective cap, and the clamping structure includes a plurality of inwardly protruding protrusions circumferentially arranged on the groove wall of the circular groove, and a clamping groove corresponding to the number and position of the protrusions on the axial outer wall of the adjusting member.

8. The adjustable flow constant temperature warming valve according to claim 7, characterized in that A flow scale is provided on the side wall of the protective cap along the circumferential direction, and the flow scale corresponds to different upper and lower width positions of the valve core outlet.

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