CN112901787A - Temperature and flow regulating valve and regulating method - Google Patents

Temperature and flow regulating valve and regulating method Download PDF

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Publication number
CN112901787A
CN112901787A CN202110306375.0A CN202110306375A CN112901787A CN 112901787 A CN112901787 A CN 112901787A CN 202110306375 A CN202110306375 A CN 202110306375A CN 112901787 A CN112901787 A CN 112901787A
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CN
China
Prior art keywords
temperature
control valve
power head
vertical
flow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110306375.0A
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Chinese (zh)
Inventor
刘成
艾文科
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Shanghai Thermostat Factory Co ltd
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Shanghai Thermostat Factory Co ltd
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Publication date
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Priority to CN202110306375.0A priority Critical patent/CN112901787A/en
Publication of CN112901787A publication Critical patent/CN112901787A/en
Pending legal-status Critical Current

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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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F16K1/38—Valve members of conical shape
    • 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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/20—Excess-flow valves
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
    • 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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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Temperature-Responsive Valves (AREA)

Abstract

The invention discloses a temperature and flow regulating valve and a regulating method. The temperature and flow regulating valve is composed of a regulating valve body, a power head assembly, a flow regulating assembly and the like. The power head part consists of an upper membrane cover, an elastic membrane and a lower membrane cover. The elastic diaphragm and the upper diaphragm cover define an upper power head chamber together. The power head upper chamber is connected with the temperature sensing bulb through the capillary tube. The elastic diaphragm and the lower diaphragm cover define a power head lower chamber together. And the lower film cover is provided with film cover holes which are respectively communicated with the lower chamber of the power head and the external atmosphere. The invention has the beneficial effects that: because the lower chamber of the power head is communicated with the outside atmosphere, the pressure in the lower chamber of the power head is constant at the atmospheric pressure, namely, the lower chamber of the power head is not influenced by the pressure fluctuation of fluid in the valve, and the lower chamber of the power head has the characteristics of high adjusting precision, simple structure, convenient manufacture and high cost performance.

Description

Temperature and flow regulating valve and regulating method
Technical Field
The invention relates to temperature flow control, in particular to a temperature flow control valve and a temperature flow control method.
Background
At present, a temperature and flow regulating valve in the market basically adopts a structure of a thermal expansion valve, namely, the temperature and flow regulating valve is provided with a power head component, a temperature sensing bulb and a capillary tube. The flow rate within the valve is controlled by movement of an elastomeric diaphragm in the powerhead assembly. Wherein, the system pressure is below the elastic diaphragm. Therefore, the system pressure fluctuation seriously affects the temperature control, and the accuracy is poor. As heat pump systems are more and more commonly used for building heating, there is a higher demand for temperature control of the compressor. Therefore, a temperature and flow regulating valve which is high in regulating precision and not influenced by system pressure needs to be designed.
Disclosure of Invention
The invention aims to solve the technical problem that a temperature flow regulating valve in the prior art is influenced by system pressure, has low regulating precision, can only be regulated on site and cannot preset temperature, and provides a novel temperature flow regulating valve and a regulating method.
In order to achieve the purpose, the technical scheme of the invention is as follows: a temperature and flow rate regulating valve comprises a temperature and flow rate regulating valve,
the regulating valve comprises a regulating valve body, a valve body and a valve body, wherein a liquid inlet cavity, a liquid outlet cavity and a control valve port between the liquid inlet cavity and the liquid outlet cavity are formed in the regulating valve body, and the control valve port extends vertically;
the power head component is fixed at the top of the regulating valve body and consists of an upper membrane cover, an elastic membrane and a lower membrane cover, the elastic membrane and the upper membrane cover jointly define an upper power head chamber, the upper power head chamber is connected with the temperature sensing bulb through the capillary tube, the temperature sensing bulb is used for sampling the real-time temperature of a target object, the elastic membrane and the lower membrane cover jointly define a lower power head chamber, and a membrane cover hole is formed in the lower membrane cover and is respectively communicated with the lower power head chamber and the external atmosphere; and the number of the first and second groups,
the flow regulating assembly is provided with a control valve core and a vertical push rod, the opening degree of the control valve core and the opening degree of the control valve port determine the flow of a cooling medium, and the elastic diaphragm controls the conical valve core to move up and down through the vertical push rod.
As a preferred scheme of the temperature and flow control valve, a liquid inlet port connected with the liquid inlet chamber and a liquid outlet port connected with the liquid outlet chamber are formed on the side wall of the control valve body, and the liquid inlet port and the liquid outlet port are respectively used as an inlet and an outlet of a cooling medium.
As a preferable scheme of the temperature and flow regulating valve, the control valve core is a conical valve core.
As a preferable scheme of the temperature and flow rate adjusting valve, the elastic membrane, the vertical push rod, the control valve core and the control valve port all have a common axis.
As a preferable scheme of the temperature and flow rate adjusting valve, the flow rate adjusting assembly further includes a vertical spring and a spring fixing seat, the spring fixing seat is located below the control valve core, a vertical interval is formed between the spring fixing seat and the control valve core, and the vertical spring is located between the control valve core and the spring fixing seat and used for upwards supporting the control valve core. The flow regulating assembly is also provided with a vertical screw rod below the spring fixing seat, the vertical screw rod is in threaded connection with the bottom wall of the regulating valve body, the upper end of the vertical screw rod is fixedly connected with the spring fixing seat, and the lower end of the vertical screw rod is a screwing part.
As a preferred scheme of the temperature and flow control valve, the elastic diaphragm is located above the top wall of the control valve body, the vertical push rod is provided with an upper push rod section which penetrates out of the top wall of the control valve body upwards, the top surface of the upper push rod section is abutted against the bottom surface of the elastic diaphragm, the flow control assembly is further provided with a vertical corrugated pipe, the vertical corrugated pipe surrounds the periphery of the upper push rod section, the top edge of the vertical corrugated pipe is circumferentially sealed with the upper push rod section, and the bottom edge of the vertical corrugated pipe is circumferentially sealed with the top wall of the control valve body.
The invention also provides a regulating method of the temperature and flow regulating valve, which comprises the following steps,
providing the temperature and flow regulating valve; and the number of the first and second groups,
providing a cooling medium and a target object, wherein the cooling medium provides cold for the target object;
if the real-time temperature sampled by the temperature sensing bulb is higher than the balance temperature, the pressure in the upper chamber of the power head is increased while the pressure in the lower chamber of the power head is unchanged, the elastic diaphragm drives the vertical push rod to move downwards to the control valve core, and the opening degree of the control valve core and the control valve port is increased to increase the flow of the cooling medium so as to promote the target object to return to the balance temperature;
if the real-time temperature sampled by the temperature sensing bulb is lower than the balance temperature, the pressure in the upper chamber of the power head is reduced, the pressure in the lower chamber of the power head is unchanged, the vertical spring drives the vertical push rod to move upwards to the control valve core, and the opening degree of the control valve core and the control valve port is reduced to reduce the flow of the cooling medium so as to promote the target object to return to the balance temperature.
Compared with the prior art, the invention has the beneficial effects that: because the lower chamber of the power head is communicated with the outside atmosphere, the pressure in the lower chamber of the power head is constant at the atmospheric pressure, namely, the lower chamber of the power head is not influenced by the pressure fluctuation of fluid in the valve, and the lower chamber of the power head has the characteristics of high adjusting precision, simple structure, convenient manufacture and high cost performance.
In addition to the technical problems solved by the present invention, the technical features constituting the technical solutions, and the advantageous effects brought by the technical features of the technical solutions described above, other technical problems solved by the present invention, other technical features included in the technical solutions, and advantageous effects brought by the technical features will be described in further detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram according to an embodiment of the present invention.
Detailed Description
The invention will be described in further detail below with reference to specific embodiments and drawings. Here, the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1, a temperature-flow regulating valve is shown. The temperature and flow regulating valve is an actuating mechanism which is controlled by a temperature signal and can realize automatic flow regulation and intelligent management. The temperature and flow regulating valve can be applied to the exhaust temperature of various refrigerating systems of air conditioners, heat pumps, freezing, refrigeration and the like or the temperature control of each part of the compressor.
The temperature and flow regulating valve is composed of a regulating valve body 1, a power head assembly 2, a flow regulating assembly 3 and the like.
The regulating valve body 1 is internally provided with a liquid inlet cavity chamber 11, a liquid outlet cavity chamber 12 and a valve cavity partition plate between the liquid inlet cavity chamber 11 and the liquid outlet cavity chamber 12. The valve cavity partition plate is provided with a control valve port 13 which is respectively communicated with the liquid inlet cavity 11 and the liquid outlet cavity 12. The control valve port 13 extends vertically. A liquid inlet interface 14 communicated with the liquid inlet cavity 11 and a liquid outlet interface 15 communicated with the liquid outlet cavity 12 are formed on the side wall of the regulating valve body 1. The liquid inlet port 14 and the liquid outlet port 15 are respectively used as an inlet and an outlet of a refrigerant. In this embodiment, the liquid inlet port 14 and the liquid outlet port 15 are respectively located on the left side and the right side of the regulating valve body 1.
The power head assembly 2 comprises a power head component 21, a temperature sensing bulb 22, a capillary tube 23 and the like. The power head part 21 is fixed on the top of the regulating valve body 1. The power head unit 21 is composed of an upper diaphragm cover 211, an elastic diaphragm 212, and a lower diaphragm cover 213. The elastic membrane 212 is located between the upper membrane cover 211 and the lower membrane cover 213. The elastic diaphragm 212 and the upper diaphragm cover 211 jointly define a power head upper chamber. The power head upper chamber is communicated with the temperature sensing bulb 22 through the capillary tube 23. The thermal bulb 22 has a medium therein. The thermal bulb 22 is used for sampling the real-time temperature of the target (the real-time temperature of the target is used as the temperature signal). The elastic diaphragm 212 and the lower diaphragm cover 213 define a lower chamber of the power head together. The lower film cover 213 is formed with a film cover hole. The membrane cover hole is respectively communicated with the lower chamber of the power head and the external atmosphere, namely the lower chamber of the power head is under constant atmospheric pressure.
The flow regulating assembly 3 is provided with a vertical push rod 31, a conical valve core 32, a spring fixing seat 33, a vertical spring 34, a sealing ring and the like. The conical spool 32 is located inside the control valve port 13. The opening degrees of the conical valve element 32 and the control valve port 13 determine the flow rate of the cooling medium. The vertical push rod 31 is located between the elastic diaphragm 212 and the conical valve core 32, that is, the upper end of the vertical push rod 31 abuts against the elastic diaphragm 212, and the lower end of the vertical push rod 31 abuts against the conical valve core 32. The spring fixing seat 33 is located below the conical valve core 32 and has a vertical interval therebetween. The vertical spring 34 is located between the conical valve core 32 and the spring fixing seat 33. The vertical spring 34 always provides an upward spring force for supporting the control spool upward.
Preferably, the flow regulating assembly 3 also has a vertical screw 35. The vertical screw 35 is located below the spring fixing seat 33. The vertical screw 35 is in threaded connection with the bottom wall of the regulating valve body 1. The upper end of the vertical screw 35 is fixedly connected with the spring fixing seat 33, and the lower end of the vertical screw 35 is a screwing part. The vertical screw 35 is provided to vertically displace the spring fixing seat 33 by screwing the lower end of the vertical screw 35, that is, to adjust the vertical interval to change the upward elasticity of the vertical spring 34 on the conical valve core 32, so as to set the parameters of the temperature and flow regulating valve, such as the balance temperature.
Preferably, the vertical push rod 31 has a push rod upper section which protrudes upward from the top wall of the regulating valve body 1. The top surface of the upper section of the push rod is abutted against the bottom surface of the elastic membrane 212. The flow regulating assembly 3 also has a vertical bellows 36. The vertical corrugated pipe 36 surrounds the periphery of the upper section of the push rod. Wherein the top edge of the vertical bellows 36 is sealed (e.g., welded) to the upper section of the push rod, and the bottom edge of the vertical bellows 36 is sealed (e.g., welded) to the top wall of the regulator valve body 1. The vertical corrugated pipe 36 has certain flexibility, and the top edge of the vertical corrugated pipe 36 and the upper section of the push rod act synchronously. It can be seen that the above design can prevent the cooling medium inside the regulating valve body 1 from flowing out along the vertical push rod 31.
The working principle of the temperature and flow regulating valve is as follows:
the inlet port 14 is used for inputting the cooling medium. The liquid outlet 15 is used for outputting the cooling medium.
In the initial state, the flow rate of the cooling medium just keeps the temperature of the target stable, that is, the target reaches the equilibrium temperature, and the real-time temperature sampled by the thermal bulb 22 is the equilibrium temperature. At this time, the conical spool 32 is in equilibrium, i.e., the evaporation pressure generated by the medium in the bulb 22 acts on the elastic diaphragm 212. The downward pressure of the flexible diaphragm 212 is equal to the evaporation pressure of the medium in the bulb 22 multiplied by the area of the flexible diaphragm 212. The downward pressure of the elastic diaphragm 212 is transmitted to the conical valve core 32 through the vertical push rod 31. The conical spool 32 is also subjected to an upward spring force by the vertical spring 34. At this time, the two forces are equal and the conical spool 32 is in equilibrium.
If the temperature of the target rises, the real-time temperature sampled by the thermal bulb 22 is greater than the equilibrium temperature, the evaporation pressure of the medium in the thermal bulb 22 rises, and the downward pressure generated by the elastic diaphragm 212 rises. At this time, the elastic membrane 212 drives the vertical push rod 31 to move down the conical valve core 32. Since the conical spool 32 moves downward, that is, the opening between the conical spool 32 and the control valve port 13 increases, the flow rate of the cooling medium increases. The cooling medium flow is increased to urge the target downward to an equilibrium temperature.
If the temperature of the target object is reduced and the real-time temperature sampled by the thermal bulb 22 is lower than the equilibrium temperature, the evaporation pressure of the medium in the thermal bulb 22 is reduced, and the downward pressure generated by the elastic diaphragm 212 is reduced. At this time, the vertical spring 34 drives the vertical push rod 31 to move up the conical valve core 32. Since the conical spool 32 moves upward, that is, the opening between the conical spool 32 and the control valve port 13 decreases, the flow rate of the cooling medium decreases accordingly. The cooling medium flow is reduced, causing the target to return upward to an equilibrium temperature.
The foregoing merely represents embodiments of the present invention, which are described in some detail and detail, and therefore should not be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (8)

1. The temperature and flow rate regulating valve is characterized by comprising,
the regulating valve comprises a regulating valve body, a valve body and a valve body, wherein a liquid inlet cavity, a liquid outlet cavity and a control valve port between the liquid inlet cavity and the liquid outlet cavity are formed in the regulating valve body, and the control valve port extends vertically;
the power head component is fixed at the top of the regulating valve body and consists of an upper membrane cover, an elastic membrane and a lower membrane cover, the elastic membrane and the upper membrane cover jointly define an upper power head chamber, the upper power head chamber is connected with the temperature sensing bulb through the capillary tube, the temperature sensing bulb is used for sampling the real-time temperature of a target object, the elastic membrane and the lower membrane cover jointly define a lower power head chamber, and a membrane cover hole is formed in the lower membrane cover and is respectively communicated with the lower power head chamber and the external atmosphere; and the number of the first and second groups,
the flow regulating assembly is provided with a control valve core and a vertical push rod, the opening degree of the control valve core and the opening degree of the control valve port determine the flow of a cooling medium, and the elastic diaphragm controls the conical valve core to move up and down through the vertical push rod.
2. The temperature and flow rate adjusting valve according to claim 1, wherein a liquid inlet port connected to the liquid inlet chamber and a liquid outlet port connected to the liquid outlet chamber are formed on a side wall of the adjusting valve body, and the liquid inlet port and the liquid outlet port are respectively used as an inlet and an outlet of a cooling medium.
3. The temperature-flow regulating valve of claim 1, wherein the control spool is a conical spool.
4. The temperature-flow regulating valve of claim 1, wherein the resilient diaphragm, the vertical pushrod, the control spool, and the control valve port all have a common axis.
5. The temperature-flow control valve of claim 1, wherein the flow regulating assembly further comprises a vertical spring and a spring retainer, the spring retainer is located below the control valve spool with a vertical space therebetween, the vertical spring is located between the control valve spool and the spring retainer, and the vertical spring is configured to support the control valve spool upward.
6. The temperature-flow control valve according to claim 5, wherein the flow control assembly further comprises a vertical screw rod disposed below the spring fixing seat, the vertical screw rod is screwed with the bottom wall of the control valve body, an upper end of the vertical screw rod is fixedly connected with the spring fixing seat, and a lower end of the vertical screw rod is a screwing part.
7. The temperature-flow control valve according to claim 1, wherein the elastic diaphragm is located above the top wall of the control valve body, the vertical push rod has an upper push rod section that extends upward from the top wall of the control valve body, a top surface of the upper push rod section abuts against a bottom surface of the elastic diaphragm, the flow control assembly further has a vertical bellows, the vertical bellows surrounds the periphery of the upper push rod section, wherein a top edge of the vertical bellows is circumferentially sealed with the upper push rod section, and a bottom edge of the vertical bellows is circumferentially sealed with the top wall of the control valve body.
8. The regulating method of the temperature and flow regulating valve is characterized by comprising the following steps,
providing a temperature-flow regulating valve according to any one of claims 1 to 7; and the number of the first and second groups,
providing a cooling medium and a target object, wherein the cooling medium provides cold for the target object;
if the real-time temperature sampled by the temperature sensing bulb is higher than the balance temperature, the pressure in the upper chamber of the power head is increased while the pressure in the lower chamber of the power head is unchanged, the elastic diaphragm drives the vertical push rod to move downwards to the control valve core, and the opening degree of the control valve core and the control valve port is increased to increase the flow of the cooling medium so as to promote the target object to return to the balance temperature;
if the real-time temperature sampled by the temperature sensing bulb is lower than the balance temperature, the pressure in the upper chamber of the power head is reduced, the pressure in the lower chamber of the power head is unchanged, the vertical spring drives the vertical push rod to move upwards to the control valve core, and the opening degree of the control valve core and the control valve port is reduced to reduce the flow of the cooling medium so as to promote the target object to return to the balance temperature.
CN202110306375.0A 2021-03-23 2021-03-23 Temperature and flow regulating valve and regulating method Pending CN112901787A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110306375.0A CN112901787A (en) 2021-03-23 2021-03-23 Temperature and flow regulating valve and regulating method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110306375.0A CN112901787A (en) 2021-03-23 2021-03-23 Temperature and flow regulating valve and regulating method

Publications (1)

Publication Number Publication Date
CN112901787A true CN112901787A (en) 2021-06-04

Family

ID=76106034

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110306375.0A Pending CN112901787A (en) 2021-03-23 2021-03-23 Temperature and flow regulating valve and regulating method

Country Status (1)

Country Link
CN (1) CN112901787A (en)

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