CN120626812A - A temperature-sensing reversing valve core assembly, reversing valve and heat exchange system - Google Patents
A temperature-sensing reversing valve core assembly, reversing valve and heat exchange systemInfo
- Publication number
- CN120626812A CN120626812A CN202511023908.9A CN202511023908A CN120626812A CN 120626812 A CN120626812 A CN 120626812A CN 202511023908 A CN202511023908 A CN 202511023908A CN 120626812 A CN120626812 A CN 120626812A
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- Prior art keywords
- temperature
- valve
- expansion joint
- sensitive
- sensing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/002—Actuating devices; Operating means; Releasing devices actuated by temperature variation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Temperature-Responsive Valves (AREA)
Abstract
本发明提供了一种感温换向阀芯组件、换向阀门及换热系统，感温换向阀芯组件包括阀壳、阀塞组件、阀杆驱动机构和感温驱动组件，阀塞组件包括阀杆与阀塞，阀杆上套装有限位在阀壳与阀杆端部的端片之间的复位弹簧；阀杆驱动机构包括三轴垂直的杠杆、连接件和摆动件，摆动件穿过阀座对阀杆形成按压或释放；感温驱动组件包括第一感温膨胀节、第一感温包、第二感温膨胀节和第二感温包；杠杆通过拉紧弹簧压紧在第二感温膨胀节上。本发明摒弃了电子检测与控制电路，在高温、强振动或腐蚀性介质中仍能稳定工作，避免传统电子系统因环境干扰导致的误动作，使其可以适用于防爆、无源或野外极端环境，还可以避免电子元件老化漂移问题。
The present invention provides a temperature-sensitive reversing valve core assembly, a reversing valve, and a heat exchange system. The temperature-sensitive reversing valve core assembly includes a valve housing, a valve plug assembly, a valve stem drive mechanism, and a temperature-sensitive drive assembly. The valve plug assembly includes a valve stem and a valve plug. The valve stem is provided with a return spring limited between the valve housing and the end plate at the end of the valve stem. The valve stem drive mechanism includes a three-axis vertical lever, a connecting member, and a swinging member. The swinging member passes through the valve seat to press or release the valve stem. The temperature-sensitive drive assembly includes a first temperature-sensitive expansion joint, a first temperature-sensitive package, a second temperature-sensitive expansion joint, and a second temperature-sensitive package. The lever is pressed against the second temperature-sensitive expansion joint by a tension spring. The present invention abandons electronic detection and control circuits and can still operate stably in high temperature, strong vibration, or corrosive media, avoiding malfunctions of traditional electronic systems caused by environmental interference, making it suitable for explosion-proof, passive, or extreme outdoor environments. It can also avoid aging and drift problems of electronic components.
Description
Technical Field
The invention belongs to the field of heat exchangers, and particularly relates to a temperature-sensing reversing valve core assembly, a reversing valve and a heat exchange system.
Background
In the solar heat exchange system, an incoming medium (hereinafter referred to as an incoming medium) in a pipeline communicated with a solar heat collector enters a user side heat exchanger, so that water in the user side heat exchanger is heated. However, effective heat exchange can be achieved when the temperature of the incoming fluid is higher than the water temperature in the user side heat exchanger, whereas reverse heat transfer may occur resulting in a drop in the water temperature in the user side heat exchanger. The traditional control scheme generally adopts an electronic temperature sensor to monitor the temperature of water and inflow in a user side heat exchanger in real time, and after temperature numerical comparison is carried out through a controller, an electric reversing valve or an electromagnetic reversing valve is driven to execute on-off and flow direction control.
The electronic control mode has the following defects that 1, the whole system needs to continuously supply power to maintain operation, applicability is limited in a non-stable power supply or explosion-proof scene, 2, the electronic system formed by a temperature sensor, a controller and an electric executing mechanism is suddenly reduced in reliability under severe working conditions such as high temperature, high humidity and vibration, misjudgment or failure is easily caused, 3, the electronic components have aging drift problems, and the maintenance cost is high.
Disclosure of Invention
The embodiment of the invention provides a temperature-sensing reversing valve core assembly, a reversing valve and a heat exchange system, and aims to solve the technical problems.
In order to achieve the purpose, the invention adopts the technical scheme that the temperature-sensing reversing valve core assembly comprises:
A valve housing, in which a valve seat is arranged;
The valve plug assembly is arranged on one side of the valve seat and comprises a valve rod penetrating through the bottom of the valve casing, an end piece fixedly arranged at the end part of the valve rod and a valve plug connected with the end of the valve rod extending out of the valve casing, and the valve rod is sleeved with a reset spring limited between the valve casing and the end piece;
The valve rod driving mechanism is arranged on the other side of the valve seat and comprises a lever, a connecting piece and a swinging piece which are rigidly connected and vertical to each other in a triaxial manner, wherein the free end of the swinging piece penetrates through the valve seat and is abutted with the end piece;
The temperature-sensing driving assembly comprises a first temperature-sensing expansion joint arranged above the swinging piece and a second temperature-sensing expansion joint arranged below the swinging piece, wherein one end of the first temperature-sensing expansion joint and one end of the second temperature-sensing expansion joint are respectively fixedly assembled on the valve seat, the other end of the first temperature-sensing expansion joint and one end of the second temperature-sensing expansion joint are respectively hinged or abutted with two ends of the lever, when one of the temperature-sensing expansion joints is hinged, the other temperature-sensing expansion joint is abutted with the other temperature-sensing expansion joint, the first temperature-sensing expansion joint is communicated with a first temperature-sensing bulb through a rigid pipeline, the second temperature-sensing expansion joint is communicated with a second temperature-sensing bulb through a rigid pipeline, the first temperature-sensing expansion joint and the second temperature-sensing expansion joint can respectively expand and contract towards or away from the direction of the lever based on the temperatures of contact mediums of the first temperature-sensing bulb and the second temperature-sensing bulb, and
At least two tensioning springs, which are tightly assembled between the two ends of the connecting piece and the valve seat;
When the expansion amount of the first temperature-sensing expansion joint is smaller than that of the second temperature-sensing expansion joint, the lever rotates clockwise to drive the swinging piece to press the valve plug assembly, otherwise, the swinging piece releases to press, and the valve rod is sprung up under the action of the reset spring to drive the valve plug to move upwards.
In the embodiment of the application, firstly, the expansion force of the temperature-sensing expansion joint is very large, such as the phenomenon that the pipeline is broken due to volume expansion caused by icing, which is common in nature. Secondly, the temperature sensing bulb and the filler in the temperature sensing expansion joint which is rigidly communicated with the temperature sensing bulb are relative temperature sensing substances, and the expansion amount generated by the influence of temperature is obvious. The valve rod driving mechanism can realize self-operated control of the valve plug based on the temperature difference sensed by the first temperature sensing bulb and the second temperature sensing bulb, an electronic detection and control circuit is abandoned, flow direction switching can be realized without external power supply, and failure risks of electronic components in temperature detection, signal processing and execution links are eliminated. Specifically, temperature sensitive mediums are filled in the temperature sensing bulb and the temperature sensing expansion joint respectively, when the temperature of fluid outside the first temperature sensing bulb is higher than that of fluid outside the second temperature sensing bulb, the first temperature sensing expansion joint expands and pushes the lever to rotate anticlockwise, so that the valve rod and the valve plug are driven to move upwards, movement of the valve plug is realized, and then control of fluid flow direction is realized. The temperature-sensing driving assembly has the advantages that the follow-up response is realized through the inherent thermodynamic characteristics of the temperature-sensing driving assembly, the operation can still be stabilized in high-temperature, strong-vibration or corrosive media, and misoperation caused by environmental interference of a traditional electronic system is avoided, so that the temperature-sensing driving assembly can be suitable for explosion-proof, passive or outdoor extreme environments, has strong adaptability and wide application scene, and in addition, the aging drift problem of electronic elements can be avoided, the operation and maintenance cost and the failure rate are obviously reduced, and the service life is prolonged.
In some embodiments, an end of the first temperature-sensitive expansion joint is hinged with an upper end of the lever, and an end of the second temperature-sensitive expansion joint is abutted with a lower end of the lever.
In some embodiments, the valve seat is provided with a vertical guide groove suitable for the swinging piece to pass through, the vertical guide groove is formed to enable the swinging piece to swing in degree of freedom, and/or
The free end of the second temperature-sensing expansion joint is provided with a guide cone, the lower part of the lever is provided with a guide limit groove extending along the length direction of the lever, and the second temperature-sensing expansion joint is in sliding abutting connection with the guide limit groove.
In some embodiments, the length of the swinging member is greater than the length of the lever, so as to form an amplifying structure that the relative expansion and contraction amounts of the first temperature-sensitive expansion joint and the second temperature-sensitive expansion joint are conducted to the pressing amount or the releasing amount of the swinging member.
In some embodiments, expansion joint guide barrels are further arranged on the peripheries of the first temperature-sensing expansion joint and the second temperature-sensing expansion joint respectively, one end of each expansion joint guide barrel is fixedly assembled with the valve seat, and the other end of each expansion joint guide barrel is open, so that the first temperature-sensing expansion joint and the second temperature-sensing expansion joint can freely stretch out and draw back along the axial directions of the first temperature-sensing expansion joint and the second temperature-sensing expansion joint, and support for the corresponding temperature-sensing expansion joint is formed.
In some embodiments, adjusting screws adapted to adjust the first and second temperature-sensitive expansion joints are respectively mounted on the valve seats. In the embodiment of the application, the distance between the temperature-sensing expansion joint and the valve seat is adjusted through the screw, so that the balance angle of the lever is adjusted, the action temperature difference of the valve plug can be adjusted according to actual requirements, and the universality of the device is improved.
In some embodiments, the first bulb has a volume that is greater than the volume of the first temperature-sensitive expansion joint and the second bulb has a volume that is greater than the volume of the second temperature-sensitive expansion joint. Specifically, the volume of the temperature sensing bulb can be 2-5 times of the volume of the corresponding temperature sensing expansion joint so as to increase the expansion or contraction amount of the temperature sensing expansion joint when the temperature changes.
In some embodiments, the lever, the valve stem, and the oscillating member lie on the same vertical plane.
In a second aspect, the invention further provides a reversing valve, comprising the temperature-sensing reversing valve core assembly and a valve channel, wherein the valve channel is fixed with the valve shell, and the valve plug extends into the valve channel;
wherein, the valve way includes:
A first valve passage adapted to introduce an incoming medium;
A second valve passage connected with the first valve passage, a first opening suitable for conducting incoming medium and matched with the valve plug is arranged between the second valve passage and the first valve passage, the second valve passage is suitable for being communicated with a user side heat exchanger, and
The third valve channel is connected with the first valve channel, a second opening is formed in the connecting position, the second opening is arranged on the pressing path of the valve plug, and the third valve channel is suitable for being communicated with an external circulation system;
The valve plug passes through the first opening and is suitable for sealing the first opening or sealing the second opening, when the temperature of an incoming flow medium is lower than the water temperature in the user side heat exchanger, the valve plug is abutted against the bottom end of the first opening under the action of the return spring to form end face sealing, the incoming flow medium enters the third valve channel to perform external circulation, and when the temperature of the incoming flow medium is higher than the water temperature in the user side heat exchanger and the temperature difference reaches a certain threshold value, the valve plug presses the swinging piece to seal the second opening, and the incoming flow medium enters the second valve channel to exchange heat with the user side heat exchanger.
In a third aspect, the invention also provides a heat exchange system, which comprises the reversing valve.
Based on the advantages of the temperature sensing reversing valve core assembly on the self-operated control of the valve plug, the valve assembly and the heat exchange system provided by the invention can solve the defect that the reliability of the valve in the prior art suddenly drops under severe working conditions such as high temperature, high humidity, vibration and the like.
Drawings
Fig. 1 is a schematic structural view of a heat exchange system according to the present invention.
FIG. 2 is a schematic diagram of an assembly of a valve stem actuator and a temperature sensitive actuator assembly of the present invention.
Reference numerals illustrate:
1-first temperature-sensing expansion joint, 2-valve shell, 3-lever, 4-connecting piece, 5-first valve channel, 6-second temperature-sensing bag, 7-valve plug, 8-third valve channel, 9-tensioning spring, 10-swinging piece, 11-reset spring, 12-valve seat, 13-second valve channel, 14-valve rod, 15-first temperature-sensing bag, 16-user side heat exchanger, 17-second temperature-sensing expansion joint, 18-guiding limit groove, 19-expansion joint guiding cylinder and 20-end piece.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In fluid heat exchange systems, temperature regulation is typically achieved by controlling the on-off or flow direction of a heating medium. And conversely, if the temperature of the working medium is insufficient, the heat can be reversely absorbed, so that the temperature of the heated medium is not increased and is reversely reduced. In the prior art, an electronic control scheme is generally adopted in the system, for example, an electronic temperature sensor is arranged on a pipeline, temperature signals of a working medium inlet and a heated medium are collected in real time, and data are transmitted to a controller for comparison operation. And the controller sends an instruction to the electric valve or the electromagnetic valve according to the comparison result, and realizes heat exchange control by adjusting the opening/closing state of the valve or switching the direction of the flow channel. However, the above scheme has obvious limitations that firstly, the electronic control system is difficult to implement in the scene without stable power supply or explosion-proof requirement depending on continuous power supply, secondly, complex circuits are required to be arranged among the temperature sensor, the controller and the electric actuating mechanism, the components are easy to age, signal distortion or line faults when the temperature sensor, the controller and the electric actuating mechanism are exposed to high temperature, humidity or vibration environment for a long time, and furthermore, the response precision of the electronic device is easy to be influenced by environmental temperature fluctuation, and the performance is required to be maintained by regular calibration and maintenance, so that the operation and maintenance cost is increased. In addition, the whole system comprises a plurality of discrete components, so that the occupied space is large, the installation complexity is high, and the miniaturization design of equipment is not facilitated.
According to the temperature-sensing reversing valve core assembly, the valve plug is driven to act by utilizing the expansion caused by heat and contraction caused by cold of temperature-sensing liquid in the temperature-sensing driving assembly, a temperature sensor, a controller and a power supply circuit are not required to be configured, dependence of electronic devices is fundamentally avoided, the temperature-sensing reversing valve core assembly is particularly suitable for non-power-supply, explosion-proof or outdoor complex environments, failure risks of electronic elements in high-temperature, vibration and corrosive media are removed, and failure rate caused by aging and signal drift of the electronic elements is remarkably reduced. In addition, the structure integration level of this scheme is high, compact structure, and external wiring and split type controller have been saved, have reduced device occupation space when having simplified the installation flow.
Referring to fig. 1 and fig. 2 together, the temperature-sensing reversing valve core assembly provided by the invention will now be described. The temperature-sensing reversing valve core assembly comprises a valve shell 2, a valve plug assembly, a valve rod driving mechanism, a temperature-sensing driving assembly and a tensioning spring 9, wherein the temperature-sensing driving assembly is used for controlling the valve rod driving mechanism to rotate, and then the valve plug 7 is driven to move. Specifically, a valve seat 12 is arranged in the valve casing 2, specifically, the valve seat 12 is of a vertically arranged plate-shaped structure, the valve casing 2 is divided into two parts, and the valve seat 12 is used for assembling a temperature sensing driving assembly and a limiting valve rod driving mechanism. The valve plug assembly comprises a valve rod 14 penetrating through the bottom of the valve shell 2, an end piece 20 fixedly arranged at the end of the valve rod 14 and a valve plug 7 connected with the end of the valve rod 14 extending out of the valve shell, wherein the valve rod 14 is sleeved with a reset spring 11 limited between the valve shell 2 and the end piece 20. The return spring 11 is compressed and fixed between the valve housing 2 and the end piece 20, and when the pressure of the valve rod 14 is released, the return spring 11 pushes the valve rod upwards to realize valve plug lifting.
In fig. 1, the valve seat is cut in the front half, and in fig. 2, the valve seat 12 is cut in the rear and upper halves, showing the first temperature-sensitive expansion joint 1 unassembled.
The valve stem 14 driving mechanism is provided on the other side of the valve seat 12, and includes the lever 3, the connecting member 4, and the swinging member 10, which are rigidly connected and three-axis-perpendicular. The free end of the swinging member 10 penetrates the valve seat 12 and abuts against the end piece 20, that is, the swinging member 10 is kept in sliding contact with the end piece 20 when being pressed down. Of course, the contact area of the end piece 20 may be increased for better contact. The lever 3, the link 4 and the swinging member 10 form a three-axis perpendicular structure as the x-axis, the y-axis and the z-axis of the coordinate axes. Based on this concept, the person skilled in the art designs the triaxial as other connection angles, as long as the lever 3 rotates based on the temperature difference, thereby driving the swinging member 10 to press or release the valve stem 14, is within the scope of the present invention.
The temperature-sensing driving assembly comprises a first temperature-sensing expansion joint 1 arranged above the swinging piece 10 and a second temperature-sensing expansion joint 17 arranged below the swinging piece 10, wherein one end of the first temperature-sensing expansion joint 1 and one end of the second temperature-sensing expansion joint 17 are respectively fixedly assembled on the valve seat 12, the other end of the first temperature-sensing expansion joint is respectively hinged or abutted with two end parts of the lever 3, and when one temperature-sensing expansion joint is hinged, the other temperature-sensing expansion joint is abutted. The first temperature-sensing expansion joint 1 is communicated with a first temperature sensing bulb 15 through a rigid pipeline, and the second temperature-sensing expansion joint 17 is communicated with a second temperature sensing bulb 6 through a rigid pipeline. The first and second temperature-sensitive expansion joints 1 and 17 are capable of expanding and contracting in a direction approaching or separating from the lever 3 based on the temperatures of the contact medium of the first and second temperature-sensitive bulbs 15 and 6, respectively. Wherein the first bulb 15 is adapted to be fitted in the user side heat exchanger 16 for measuring the water temperature and the second bulb 6 is adapted to be fitted in the valve channel for measuring the temperature of the incoming medium.
The tension springs 9 are arranged in pairs, at least one group is arranged, and are tightly fitted between both ends of the connecting member 4 and the valve seat 12. The tension spring 9 is adapted to press the lever 3 against the telescopic end of the first temperature-sensitive expansion joint 1 or the second temperature-sensitive expansion joint 17. The connecting element 4 has a degree of freedom with respect to the tension spring 9 about its axial rotation. When the first and second temperature-sensitive expansion joints 1 and 17 expand and contract in the non-isothermal same direction, the lever 3 can rotate under the constraint of the tension spring 9 based on the difference of the up-down expansion and contraction amounts. Referring to fig. 1, the valve seat 12 is shown cut away to a position where the front half is cut away, showing the tension spring 9 with the front half unassembled with the valve seat 12.
Under specific application scenarios, when the expansion amount of the first temperature-sensing expansion joint 1 is smaller than that of the second temperature-sensing expansion joint 17, the lever 3 rotates clockwise to drive the swinging piece 10 to press the valve plug 7 assembly, otherwise the swinging piece 10 releases the pressing, and the valve rod 14 is sprung up under the action of the reset spring 11 to drive the valve plug 7 to move upwards. The valve rod 14 driving mechanism utilizes the lever principle, so that the tiny deviation of the temperature-sensing expansion joint can lead to larger swing displacement of the end part of the swing piece 10, and the tiny temperature difference can also cause the valve plug 7 to act, so that the sensitivity of the mechanism is high.
In practical applications, for example, when the temperature of the incoming flow medium is higher than the water temperature in the user side heat exchanger 16, the expansion amount of the first temperature-sensing expansion joint 1 is smaller than the expansion amount of the second temperature-sensing expansion joint 17, the valve rod driving mechanism drives the valve plug 7 to move downwards, and when a certain temperature difference is reached, the third channel starts to enter a fully closed state, so that the incoming flow medium is conducted into the user side heat exchanger 16. When the temperature of the incoming flow medium is lower than the water temperature in the user side heat exchanger 16, the expansion amount of the first temperature-sensing expansion joint 1 is larger than the expansion amount of the second temperature-sensing expansion joint 17, the swinging piece 10 is lifted upwards, the valve rod 14 drives the valve plug 7 to move upwards under the action of the reset spring 11, and the valve is closed, so that the incoming flow medium with lower temperature is prevented from entering the user side heat exchanger 16.
According to the embodiment of the application, by means of the property of temperature sensing expansion, heat saving and cold shrinking, the temperature sensing driving assembly controls the valve plug 7 to move based on the temperature difference between the fluid medium and the heat exchange medium, independent heat exchange control can be realized based on physical characteristics without depending on electronic control, temperature threshold triggering and flow direction switching can be realized without external power supply, the risk of misjudgment or failure easily caused by an electronic system in a severe environment is avoided, meanwhile, the problem that electronic components are easy to age and drift is solved, regular calibration and maintenance are not needed, the cost of later maintenance is reduced, and the service life of equipment is prolonged. In addition, the temperature-sensing reversing valve core assembly provided by the scheme is compact in structure and saves space.
In other embodiments, the connecting piece 4 is limited by adding an arc-shaped limiting groove on the basis of the previous embodiment. Specifically, the valve housing 2 is provided with a pair of arc-shaped limiting grooves, and the connecting piece 4 is slidably limited in the arc-shaped limiting grooves (not labeled in this document). The arc-shaped limit groove is matched with a possible sliding track of the connecting piece 4.
In some embodiments, the end of the first temperature-sensitive expansion joint 1 is hinged to the upper end of the lever 3, and the end of the second temperature-sensitive expansion joint 17 is in abutment with the lower end of the lever 3. The rotation of the lever 3 is restrained by the tensioning spring 9, and the upper end of the lever is also prevented from losing efficacy due to dislocation between the temperature-sensing expansion joint and the lever in a hinged mode. The end part of the first temperature-sensing expansion joint 1 is hinged with the upper end of the lever 3 in a more stable mode.
The specific hinging means may be varied. As an alternative, for example, a pair of first fitting plates are formed on the lever 3, a second fitting plate is provided at an end of the first temperature-sensitive expansion joint 1, and the first temperature-sensitive expansion joint 1 is hinged to the first fitting plate through the second fitting plate, so that the lever 3 rotates around the hinge shaft.
Alternatively, the lever 3 may directly abut against the end of the second temperature-sensitive expansion joint 17, or may abut against the end in a limited manner. For example, a guide cone (see a cone structure of the end of the second temperature-sensitive expansion joint 17 in fig. 2, not shown) is provided at the free end of the second temperature-sensitive expansion joint 17, a guide limit groove 18 extending along the length direction of the lever 3 is provided at the lower part of the lever 3, and the second temperature-sensitive expansion joint 17 is slidably abutted in the guide limit groove 18 and is kept slidably connected along the axial direction of the lever 3.
In some embodiments, the valve seat 12 is provided with a vertical guide groove adapted to pass through the oscillating piece 10, and the vertical guide groove forms an oscillating degree of freedom of the oscillating piece 10.
In some embodiments, the length of the swinging member 10 is greater than the length of the lever 3, so as to form an amplifying structure in which the relative expansion and contraction amounts of the first and second temperature-sensitive expansion joints 1 and 17 are conducted to the pressing amount or the releasing amount of the swinging member 10.
In the present application, the temperature-sensitive expansion joint uses its own stretchability to adjust the amount of stretch deformation caused by temperature changes. When the temperature sensing bulb is raised, the temperature sensing expansion joint (such as a metal corrugated pipe) can expand and stretch, and when the temperature sensing bulb is lowered, the temperature sensing expansion joint can contract. In order to prevent the temperature-sensitive expansion joint from bending to influence the axial expansion amount, expansion joint guide barrels 19 are respectively arranged on the peripheries of the first temperature-sensitive expansion joint 1 and the second temperature-sensitive expansion joint 17, one end of each expansion joint guide barrel 19 is fixedly assembled with the valve seat 12, and the other end of each expansion joint guide barrel is opened, so that the first temperature-sensitive expansion joint 1 and the second temperature-sensitive expansion joint 17 can freely stretch and retract along the axial direction of the corresponding temperature-sensitive expansion joint, and support for the corresponding temperature-sensitive expansion joint is formed. Preferably, the expansion joint guide cylinder 19 is welded to the valve seat 12. It should be noted that the length of the expansion joint guiding cylinder 19 should be slightly longer than that of the first temperature-sensing expansion joint 1 or the second temperature-sensing expansion joint 17, so as to avoid the influence of the expansion joint guiding cylinder 19 on the rotation of the lever 3.
In some embodiments, adjusting screws adapted to adjust the first and second temperature-sensitive expansion joints are respectively mounted on the valve seats. The distance between the first temperature-sensitive expansion joint 1 or the second temperature-sensitive expansion joint 17 and the valve seat is adjusted by rotating the adjusting screw, so that the balance angle of the lever 3 is adjusted by the screw. The initial position of the valve plug can also be set based on the regulated temperature difference and other parameters.
In one embodiment, the volume of the first bulb 15 is greater than the volume of the first thermal expansion joint 1, and the volume of the second bulb 6 is greater than the volume of the second thermal expansion joint 17. The first temperature-sensing expansion joint 1 and the second temperature-sensing expansion joint 17 are of slender columnar structures, and when the first temperature-sensing bulb 15 and the second temperature-sensing bulb 6 detect small temperature changes, the lengths of the first temperature-sensing expansion joint 1 and the second temperature-sensing expansion joint 17 can be obviously changed, so that the sensitivity of the first temperature-sensing expansion joint and the second temperature-sensing expansion joint to the temperature changes is ensured.
In a preferred embodiment, the lever 3, the valve stem 14 and the oscillating piece 10 lie in the same vertical plane. Specifically, the lever 3 and the swinging member 10 are both in a strip-shaped plate-like structure.
In one embodiment, the first temperature sensing bulb 15, the first temperature sensing expansion joint 1 and the rigid conduit communicated with the first temperature sensing bulb 6, the second temperature sensing expansion joint 17 and the rigid conduit communicated with the second temperature sensing expansion joint are filled with temperature-sensitive liquid, the temperature of medium in the heat exchanger and the temperature of incoming flow medium are respectively transferred to the temperature-sensitive liquid through the first temperature sensing bulb 15 and the second temperature sensing bulb 6, and the temperature-sensitive liquid expands with heat and contracts with cold to drive the first temperature sensing expansion joint 1 and the second temperature sensing expansion joint 17 to stretch. Specifically, the first temperature sensing bulb and the second temperature sensing bulb are connected with the first temperature sensing expansion joint and the second temperature sensing expansion joint through capillary tubes, and the material of the first temperature sensing bulb and the second temperature sensing bulb is metallic copper. The temperature sensitive medium is preferably paraffin or diethyl ether. Among them, diethyl ether has a compression modulus of usually about 1 GPa (1×10 9 Pa), so that it is considered to have incompressibility in conventional applications, i.e., the volume of diethyl ether of a certain mass at different temperatures is a specific value, and the application of pressure does not cause the volume to decrease. Therefore, after the diethyl ether in the first and second temperature sensing bags 6 is heated, the volume is inevitably expanded, the temperature sensing bags and the capillary tube are all fixed volumes which are rigidly restrained, the expanded volumes can be accommodated only through the length extension of the temperature sensing expansion joint, and the generated pushing force is extremely large and is enough to overcome the friction force and the elasticity of the return spring 11 so as to overcome the pressure of fluid.
The invention provides a reversing valve, which comprises the temperature-sensing reversing valve core assembly and a valve channel, wherein the valve channel is fixed with a valve shell 2, and a valve plug 7 extends into the valve channel. Wherein the valve passages comprise a first valve passage 5, a second valve passage 13 and a third valve passage 8, the first valve passage 5 being adapted to introduce an incoming flow medium. The second valve channel 13 is connected with the first valve channel 5, and a first opening suitable for conducting incoming flow medium is arranged between the second valve channel 13 and the first valve channel 5. The second valve passage 13 is adapted to communicate with a user side heat exchanger 16. The third valve channel 8 is connected with the first valve channel 5, and a second opening suitable for conducting the incoming flow medium is arranged between the third valve channel 8 and the first valve channel 5. The third valve passage 8 is adapted to communicate with an external circulation system. Wherein the first opening and the second opening are positioned in the same vertical direction. The valve plug 7 has a cylindrical structure and is movable up and down between the first opening and the second opening. In the initial state of the valve or when the temperature of water is higher than that of the incoming flow medium, the valve plug 7 is abutted against the bottom end of the first opening under the action of the reset spring 11 to form end face sealing, at the moment, the first valve channel 5 and the second valve channel 13 are blocked, the first valve channel 5 is communicated with the third valve channel 8, the incoming flow medium with lower temperature is prevented from entering the user side water heater, and the incoming flow medium can be discharged into an external circulation system through the third valve channel 8. When the temperature of the water is lower than the temperature of the incoming flow medium and the temperature difference reaches a certain threshold value, the valve plug 7 is inserted into the second opening under the pressing of the swinging piece 10 to form the peripheral surface seal, the valve plug 7 can move up and down under the state of being tightly attached to the inner wall of the third valve channel 8, at the moment, the first valve channel 5 and the third valve channel 8 are blocked, the first valve channel 5 and the second valve channel 13 are communicated, and the incoming flow medium can enter the user side water heater. Specifically, the temperature difference threshold is 5 degrees, that is, when the temperature of the incoming flow medium is 5 degrees higher than the temperature of water, the sealing of the second opening can be realized.
When the incoming flow temperature is higher than the water temperature of the user side heat exchanger 16, the valve plug 7 is driven by the valve rod 14 driving mechanism to move downwards until the second opening is closed, at this time, the first valve channel 5 and the second valve channel 13 are communicated, and the incoming flow medium can enter the user side heat exchanger 16.
When the temperature of the incoming flow medium is lower than the water temperature of the user side heat exchanger 16, the valve plug 7 moves upwards under the action of the return spring 11, so that the first opening is closed, the second valve channel 13 is closed, the first valve channel 5 is communicated with the third valve channel 8, and the incoming flow medium is led into an external circulation system, such as the incoming flow medium is returned into the solar heat collector for heating.
In actual operation, assuming that the temperature in the user side heat exchanger 16 is set to 45 ℃, the temperature of the incoming medium in the first valve passage 5 gradually increases to 50 ℃. At this time, the length of the first temperature-sensitive expansion joint 1 is unchanged, the second temperature-sensitive expansion joint 17 gradually stretches, and the second temperature-sensitive expansion joint rotates clockwise by taking the hinging point of the second temperature-sensitive expansion joint 17 with the first temperature-sensitive expansion joint 1 as a fulcrum against the lever 3 until the second temperature-sensitive expansion joint 17 stretches to the proper position. When the temperature of the incoming medium is stabilized to 50 ℃, the difference between the incoming medium temperature and the internal temperature of the user side heat exchanger 16 is 5 ℃, and the expansion difference DeltaL between the first temperature-sensitive expansion joint 1 and the second temperature-sensitive expansion joint 17 can be calculated according to the following formula:
①
Wherein, is delta The expansion elongation of the first temperature-sensitive expansion joint 1. And (V)The expansion elongation of the second temperature-sensitive expansion joint 17. And gamma is the volume expansion coefficient of the filler in the temperature-sensing expansion joint.Is the cross-sectional area of the first temperature-sensing expansion joint 1.Is the cross-sectional area of the second temperature-sensitive expansion joint 17.Is the cross-sectional area of the first bulb 15.Is the cross-sectional area of the second bulb 6.Is the length of the first bulb 15.Is the length of the second bulb 6.
Wherein, the =,=,=The method is simplified by substituting the formula ① to obtain:
②
if the first bulb 15 and the second bulb 6 are each cylindrical bodies having a size of 10mm (diameter) x100mm (length) in the present embodiment, the first temperature-sensitive expansion joint 1 and the second temperature-sensitive expansion joint 17 are each cylindrical bodies having a diameter of 8mm and a telescopic length. Substituting the above data into the public note ② can calculate Δl=1.29 mm.
The distance between the contact points of the second temperature-sensitive expansion joint 17 and the first temperature-sensitive expansion joint 1 with the lever 3 is 30mm, and the length of the swinging member 10 is 50mm. The displacement of the valve stem 14 depression was found to be 2.15mm from the triangle geometry calculation.
In another aspect, the present invention provides a heat exchange system, which includes the reversing valve provided in the foregoing embodiment.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. A temperature-sensitive reversing valve cartridge assembly, comprising:
A valve housing, in which a valve seat is arranged;
The valve plug assembly is arranged on one side of the valve seat and comprises a valve rod penetrating through the bottom of the valve casing, an end piece fixedly arranged at the end part of the valve rod and a valve plug connected with the end of the valve rod extending out of the valve casing, and the valve rod is sleeved with a reset spring limited between the valve casing and the end piece;
The valve rod driving mechanism is arranged on the other side of the valve seat and comprises a lever, a connecting piece and a swinging piece which are rigidly connected and vertical to each other in a triaxial manner, wherein the free end of the swinging piece penetrates through the valve seat and is abutted with the end piece;
The temperature-sensing driving assembly comprises a first temperature-sensing expansion joint arranged above the swinging piece and a second temperature-sensing expansion joint arranged below the swinging piece, wherein one end of the first temperature-sensing expansion joint and one end of the second temperature-sensing expansion joint are respectively fixedly assembled on the valve seat, the other end of the first temperature-sensing expansion joint and one end of the second temperature-sensing expansion joint are respectively hinged or abutted with two ends of the lever, when one of the temperature-sensing expansion joints is hinged, the other temperature-sensing expansion joint is abutted with the other temperature-sensing expansion joint, the first temperature-sensing expansion joint is communicated with a first temperature-sensing bulb through a rigid pipeline, the second temperature-sensing expansion joint is communicated with a second temperature-sensing bulb through a rigid pipeline, the first temperature-sensing expansion joint and the second temperature-sensing expansion joint can respectively expand and contract towards or away from the direction of the lever based on the temperatures of contact mediums of the first temperature-sensing bulb and the second temperature-sensing bulb, and
At least two tensioning springs, which are tightly assembled between the two ends of the connecting piece and the valve seat;
When the expansion amount of the first temperature-sensing expansion joint is smaller than that of the second temperature-sensing expansion joint, the lever rotates clockwise to drive the swinging piece to press the valve plug assembly, otherwise, the swinging piece releases to press, and the valve rod is sprung up under the action of the reset spring to drive the valve plug to move upwards.
2. The temperature-sensitive reversing valve cartridge assembly of claim 1, wherein an end of the first temperature-sensitive expansion joint is hinged to an upper end of the lever and an end of the second temperature-sensitive expansion joint is in abutment with a lower end of the lever.
3. A temperature-sensitive reversing valve cartridge assembly as defined in claim 2, wherein said valve seat is provided with a vertical guide groove adapted to pass through said oscillating member, said vertical guide groove forming an oscillating degree of freedom of said oscillating member, and/or
The free end of the second temperature-sensing expansion joint is provided with a guide cone, the lower part of the lever is provided with a guide limit groove extending along the length direction of the lever, and the second temperature-sensing expansion joint is in sliding abutting connection with the guide limit groove.
4. The temperature-sensitive reversing valve cartridge assembly of claim 1, wherein the length of the oscillating member is greater than the length of the lever to form an amplifying structure in which the relative expansion and contraction amounts of the first temperature-sensitive expansion joint and the second temperature-sensitive expansion joint are conducted to the pressing amount or the releasing amount of the oscillating member.
5. The temperature-sensitive reversing valve core assembly as claimed in claim 1, wherein expansion joint guide barrels are further arranged on the peripheries of the first temperature-sensitive expansion joint and the second temperature-sensitive expansion joint respectively, one end of each expansion joint guide barrel is fixedly assembled with the valve seat, the other end of each expansion joint guide barrel is opened, and the first temperature-sensitive expansion joint and the second temperature-sensitive expansion joint can freely stretch and retract along the axial directions of the first temperature-sensitive expansion joint and the second temperature-sensitive expansion joint and form support for the corresponding temperature-sensitive expansion joint.
6. A temperature-sensitive reversing valve cartridge assembly as recited in claim 1, wherein adjustment screws adapted to adjust the first and second temperature-sensitive expansion joints are respectively mounted on the valve seats.
7. The temperature-sensitive reversing valve cartridge assembly of claim 1, wherein the first temperature-sensitive bulb has a volume greater than the first temperature-sensitive expansion joint and the second temperature-sensitive bulb has a volume greater than the second temperature-sensitive expansion joint.
8. The temperature-sensitive reversing valve cartridge assembly of claim 1, wherein the lever, the valve stem and the oscillating member are located in the same vertical plane.
9. A reversing valve comprising a temperature-sensitive reversing valve cartridge assembly according to any one of claims 1 to 8 and a valve passage, said valve passage being secured to said valve housing, said valve plug extending into said valve passage;
wherein, the valve way includes:
A first valve passage adapted to introduce an incoming medium;
A second valve passage connected with the first valve passage, a first opening suitable for conducting incoming medium and matched with the valve plug is arranged between the second valve passage and the first valve passage, the second valve passage is suitable for being communicated with a user side heat exchanger, and
The third valve channel is connected with the first valve channel, a second opening is formed in the connecting position, the second opening is arranged on the pressing path of the valve plug, and the third valve channel is suitable for being communicated with an external circulation system;
The valve plug passes through the first opening and is suitable for sealing the first opening or sealing the second opening, when the temperature of an incoming flow medium is lower than the water temperature in the user side heat exchanger, the valve plug is abutted against the bottom end of the first opening under the action of the return spring to form end face sealing, the incoming flow medium enters the third valve channel to perform external circulation, and when the temperature of the incoming flow medium is higher than the water temperature in the user side heat exchanger and the temperature difference reaches a certain threshold value, the valve plug presses the swinging piece to seal the second opening, and the incoming flow medium enters the second valve channel to exchange heat with the user side heat exchanger.
10. A heat exchange system comprising the reversing valve of claim 8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202511023908.9A CN120626812B (en) | 2025-07-24 | 2025-07-24 | Temperature sensing reversing valve core assembly, reversing valve and heat exchange system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202511023908.9A CN120626812B (en) | 2025-07-24 | 2025-07-24 | Temperature sensing reversing valve core assembly, reversing valve and heat exchange system |
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| CN120626812B CN120626812B (en) | 2025-12-02 |
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|---|---|---|---|---|
| GB612318A (en) * | 1945-08-30 | 1948-11-11 | Exeter Gas Light & Coke Compan | Improvements in gas control valves |
| GB891845A (en) * | 1959-01-14 | 1962-03-21 | Landis & Gyr Ag | Improvements in or relating to heat regulators |
| CN2238402Y (en) * | 1995-08-23 | 1996-10-23 | 袁昌平 | Water temp. controller for gas water heater |
| CN2341083Y (en) * | 1998-03-20 | 1999-09-29 | 罗桂荣 | Household solar water heater |
| CN102758960A (en) * | 2012-07-31 | 2012-10-31 | 浙江大学 | Temperature control valve made of shape memory alloy material |
| CN204478643U (en) * | 2014-12-23 | 2015-07-15 | 合肥美的电冰箱有限公司 | For the refrigeration system of refrigeration plant |
| CN205064304U (en) * | 2015-10-18 | 2016-03-02 | 何树香 | Water pump automatic drain valve |
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2025
- 2025-07-24 CN CN202511023908.9A patent/CN120626812B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB612318A (en) * | 1945-08-30 | 1948-11-11 | Exeter Gas Light & Coke Compan | Improvements in gas control valves |
| GB891845A (en) * | 1959-01-14 | 1962-03-21 | Landis & Gyr Ag | Improvements in or relating to heat regulators |
| CN2238402Y (en) * | 1995-08-23 | 1996-10-23 | 袁昌平 | Water temp. controller for gas water heater |
| CN2341083Y (en) * | 1998-03-20 | 1999-09-29 | 罗桂荣 | Household solar water heater |
| CN102758960A (en) * | 2012-07-31 | 2012-10-31 | 浙江大学 | Temperature control valve made of shape memory alloy material |
| CN204478643U (en) * | 2014-12-23 | 2015-07-15 | 合肥美的电冰箱有限公司 | For the refrigeration system of refrigeration plant |
| CN205064304U (en) * | 2015-10-18 | 2016-03-02 | 何树香 | Water pump automatic drain valve |
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|---|---|
| CN120626812B (en) | 2025-12-02 |
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