CN106949265B - Air conditioning equipment, water chilling unit, non-return structure and control method thereof - Google Patents
Air conditioning equipment, water chilling unit, non-return structure and control method thereof Download PDFInfo
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- CN106949265B CN106949265B CN201710313354.5A CN201710313354A CN106949265B CN 106949265 B CN106949265 B CN 106949265B CN 201710313354 A CN201710313354 A CN 201710313354A CN 106949265 B CN106949265 B CN 106949265B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004378 air conditioning Methods 0.000 title claims abstract description 16
- 239000012530 fluid Substances 0.000 claims abstract description 87
- 230000001965 increasing effect Effects 0.000 claims abstract description 49
- 239000000498 cooling water Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
- Devices For Dispensing Beverages (AREA)
Abstract
The present invention provides a check structure, including: a valve body assembly comprising a valve body having an inlet, a hollow chamber, and an outlet; a check assembly movably installed in the hollow chamber to open or close the inlet; and the pressurizing assembly comprises a pressure container with adjustable pressure, and one end of the check assembly is movably arranged in the pressure container. The non-return structure has a non-return function and a pressurization function. Fluid enters the hollow cavity from the inlet of the valve body assembly, the fluid pushes the baffle plate to enable the valve core to press the pressure container, the pressure in the pressure container is gradually increased, and then the pressure of the fluid at the inlet possibly gradually increases to flow out from the outlet through the valve body, so that the high-low pressure difference of the water chilling unit can be conveniently adjusted, the stable operation of the water chilling unit is ensured, meanwhile, the back pressure valve is omitted, and the whole machine structure of the water chilling unit is optimized. The invention also provides air conditioning equipment, a water chilling unit and a control method of the non-return structure.
Description
Technical Field
The invention relates to the technical field of air conditioning equipment, in particular to air conditioning equipment, a water chilling unit, a non-return structure and a control method of the non-return structure.
Background
At present, check valves are common in various large-scale water chilling units, and have the function of ensuring that gas or liquid flows along a certain direction; when the gas or liquid flow is reversed, the pressure generated by the gas or liquid pushes the spring to seal the outlet, and the reverse flow is stopped. However, the high-low pressure difference in the cooling water set can not be adjusted to present check valve, still need cooperate the backpressure valve to use, increases part quantity, leads to the structure complicated, and the control of being not convenient for is controlled.
Disclosure of Invention
On the basis, the problem that the structure is complex and the control is inconvenient due to the fact that the existing check valve cannot independently adjust the high-low pressure difference and needs to be matched with a back pressure valve is necessary, the check structure which has a supercharging function, avoids using the back pressure valve, achieves the high-low pressure difference adjustment and is convenient to control is provided, the control method of the check structure is further provided, and meanwhile, the water chilling unit with the check structure and the air conditioning equipment with the water chilling unit are further provided.
The above purpose is realized by the following technical scheme:
a no-back structure comprising:
the valve body assembly comprises a valve body, the valve body is provided with an inlet, a hollow cavity and an outlet, and the inlet and the outlet are respectively communicated with the hollow cavity;
a check assembly movably installed in the hollow chamber to open or close the inlet; and
and the pressurizing assembly comprises a pressure container with adjustable pressure, the pressure container is arranged on the check assembly, and one end, far away from the inlet, of the check assembly is movably arranged in the pressure container.
In one embodiment, the check assembly comprises a baffle plate and a valve core, the baffle plate is mounted on the valve core, the valve core is movably arranged in the valve body, and the valve core drives the baffle plate to open or close the inlet.
In one embodiment, the pressurization assembly further comprises a pressurization plate, the pressurization plate is arranged on the valve core, and the valve core drives the pressurization plate to move in the pressure container.
In one embodiment, the cross-sectional area of the booster plate is greater than the cross-sectional area of the spool, and the cross-sectional area of the booster plate is equal to or less than the cross-sectional area of the interior of the pressure vessel.
In one embodiment, the pressurizing assembly further comprises a first branch and a first valve, the first branch is communicated with the inner cavity of the pressure container and the hollow cavity of the valve body, and the first valve is arranged on the first branch and controls the first branch to be switched on and off.
In one embodiment, the pressurizing assembly further comprises a second branch and a second valve, the second branch is communicated with the inner cavity and the high-pressure end of the pressure container, and the second valve is arranged on the second branch and controls the second branch to be switched on and off.
In one embodiment, the check assembly further comprises a spring, the valve body assembly further comprises a valve seat, the valve seat is arranged in the valve body, the spring is sleeved on the valve core, one end of the spring is abutted against the baffle, and the other end of the spring is abutted against the valve seat;
the valve core drives the baffle plate to move relative to the valve seat and enables the spring to be in a compressed or extended state.
In one embodiment, the valve body assembly further comprises a retainer ring disposed in the outlet of the valve body.
The control method of the check structure is also related to, is applied to the check structure with the technical characteristics, and comprises the following steps:
acquiring the pressure required by a water chilling unit system;
adjusting a pressurizing assembly of the check structure according to the pressure required by the system to control the pressure state of the check structure;
the check structure regulates fluid pressure.
In one embodiment, the pressure state of the check structure comprises a normal pressure state, a first pressurization state and a second pressurization state;
when the pressure required by the system is smaller than the first preset pressure value, the non-return structure is in a normal pressure state;
when the pressure required by the system is greater than or equal to the first preset pressure value and less than or equal to the second preset pressure value, the non-return structure is in a first pressurization state;
and when the pressure required by the system is greater than the second preset pressure value, the check structure is in a second pressurization state.
In one embodiment, when the check structure is in the normal pressure state, the pressurizing assembly is adjusted to enable the pressure in the pressure container in the pressurizing assembly to be equal to the pressure in the hollow cavity of the valve body assembly of the check structure.
In one embodiment, when the check structure is in the first pressurized state, the pressurizing assembly is adjusted to make the pressure in the pressure container in the pressurizing assembly larger than the pressure in the hollow cavity of the valve body assembly of the check structure.
In one embodiment, when the check structure is in the second pressurization state, the pressurization assembly is adjusted to enable the pressure container in the pressurization assembly to be in a closed state, and the check assembly presses down the pressure container in the pressurization assembly.
In one embodiment, when the pressure required by the system reaches a third preset pressure value, the pressure increasing assembly is adjusted to release the pressure of the pressure container.
The water chilling unit comprises a connecting pipeline and a check structure according to any technical characteristic;
the non-return structure is arranged in the connecting pipeline.
An air conditioning apparatus comprises a water chiller as set forth in the preceding technical features.
After the technical scheme is adopted, the invention has the beneficial effects that:
according to the air conditioning equipment, the water chilling unit, the check structure and the control method of the check structure, the pressure boosting assembly is additionally arranged on the valve body of the check structure, so that the check structure has a check function and a pressure boosting function. When fluid flows through the check structure, the fluid enters the hollow cavity from the inlet of the valve body assembly, the fluid pushes the baffle to drive the valve core to move at the moment, so that the valve core can press the pressure container, the pressure in the pressure container is gradually increased along with the continuous downward movement of the valve core, and the pressure of the fluid at the inlet can be gradually increased and then the fluid can flow out from the outlet through the valve body; the problem that effectual solution present check valve can't independently adjust the structure complicacy that the high-low pressure difference still needs to cooperate the back pressure valve to lead to, be not convenient for control, moreover, pressure among the pressure vessel is adjustable, conveniently selects different operating condition, the cooling water set high-low pressure difference's of being convenient for regulation guarantees cooling water set steady operation, simultaneously, can also cancel the back pressure valve, optimize cooling water set's whole quick-witted structure, the cooling water set of being convenient for controls, and then improve air conditioning equipment's performance.
Drawings
FIG. 1 is a schematic cross-sectional view of a check structure according to an embodiment of the present invention;
wherein:
100-no-return construction;
110-a valve body assembly;
111-a valve body;
1111-an inlet;
1112-a hollow chamber;
1113-outlet;
112-valve seat;
113-a retaining ring;
120-a check assembly;
121-a baffle;
122-a valve core;
123-a spring;
130-a pressure increasing assembly;
131-a pressure vessel;
132-a plenum plate;
133-a first branch;
134-a first valve;
135-a second branch;
136-second valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the air conditioning equipment, the water chilling unit, the check structure and the control method thereof according to the present invention are further described in detail below by embodiments and with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic cross-sectional view of a check structure 100 according to an embodiment of the invention. The invention provides a check structure 100, wherein the check structure 100 is mainly applied to a water chilling unit, and the check structure 100 ensures that fluid such as gas or liquid flows along a certain direction; when the flow direction of the fluid is reversed, the pressure generated by the fluid seals the valve port of the check structure 100, and the reverse flow of the fluid is stopped, so that the working reliability of the cold water structure is ensured. Of course, in other embodiments of the present invention, the check structure 100 may be used in other devices or systems that require a reverse flow of fluid. The non-return structure 100 has a non-return function and a pressurization function, so that high-low pressure difference in a water chilling unit can be adjusted, the stable operation of the water chilling unit is guaranteed, meanwhile, the non-return structure 100 has the pressurization function, a back pressure valve can be omitted, the whole structure of the water chilling unit is optimized, the operation and the control of the water chilling unit are facilitated, and the use performance of air conditioning equipment is improved.
In the present invention, the check structure 100 includes a valve body assembly 110, a check assembly 120, and a pressurization assembly 130. The valve body assembly 110 facilitates fluid flow while also functioning to house other components. Fluid, such as gas or liquid, enters and exits the valve body assembly 110. Check assembly 120 is movably mounted in valve body assembly 110 to open or close inlet 1111; the pressure intensifier assembly 130 is mounted to the valve body assembly 110. The check assembly 120 can prevent the fluid from flowing reversely, so that the fluid flows in a predetermined direction, the influence of the reverse flow of the fluid on the working reliability of the water chilling unit is avoided, the stable and reliable operation of the water chilling unit is ensured, and the working reliability of the air conditioning equipment is further ensured. The pressurizing assembly 130 can pressurize the pressure of the fluid flowing out from the valve body assembly 110 to realize the adjustment of the fluid pressure, further realize the adjustment of the high-low pressure difference of the water chilling unit and ensure the stable operation of the water chilling unit. Meanwhile, the check structure 100 increases the fluid pressure through the pressurizing assembly 130, so that the check structure 100 has a pressurizing function, the increase of a back pressure valve is avoided, the adjustment of high-low pressure difference is realized, the whole structure of the water chilling unit is optimized, the complexity of the structure of the water chilling unit is reduced, the control of the water chilling unit is facilitated, and the control of the air conditioning equipment is facilitated.
Specifically, the valve body assembly 110 includes a valve body 111, the valve body 111 has an inlet 1111, a hollow chamber 1112 and an outlet 1113, and the inlet 1111 and the outlet 1113 are respectively connected to the hollow chamber 1112. Fluid enters from the inlet 1111 of the valve body 111, passes through the hollow chamber 1112, and exits from the outlet 1113 of the valve body 111. The check assembly 120 includes a baffle 121 and a valve element 122, the baffle 121 is mounted on the valve element 122, the valve element 122 is movably disposed in the valve body 111, and the valve element 122 drives the baffle 121 to open or close the inlet 1111. When fluid flows through the check structure 100 in the direction of the arrow shown in fig. 1, the fluid under the pressure thereof can push the baffle plate 121 to drive the valve element 122 to move in the valve body 111, so that the baffle plate 121 gradually moves away from the inlet 1111 of the valve body 111, and the inlet 1111 of the valve body 111 is opened, at this time, the fluid enters the hollow cavity 1112 through the inlet 1111 and flows out through the outlet 1113 of the valve body 111. When the fluid flows in the reverse direction, i.e. the direction of the arrow shown in fig. 1 is opposite, the fluid enters the hollow cavity 1112 from the outlet 1113 of the valve body 111 and contacts the baffle 121, and the fluid under its pressure can push the baffle 121 to move the valve element 122 in the valve body 111, so that the baffle 121 moves toward the inlet 1111 of the valve body 111, and further seals the inlet 1111 of the valve body 111, at this time, the fluid cannot flow out from the inlet 1111 of the valve body 111, i.e. the check assembly 120 plays a role in preventing the fluid from flowing in the reverse direction. Preferably, the shape and size of the baffle 121 are matched with those of the inlet 1111 of the valve body 111, so that the sealing performance of the matching position between the baffle 121 and the inlet 1111 when the check structure 100 prevents the fluid from flowing reversely can be ensured, the check effect can be ensured, and the reliability of the operation of the check structure 100 can be improved.
The pressurizing assembly 130 includes a pressure vessel 131 with adjustable pressure, the pressure vessel 131 is disposed on the check assembly 120, and an end of the check assembly 120 remote from the inlet 1111 is movably disposed in the pressure vessel 131. The pressure in the pressure vessel 131 is adjustable to facilitate selection of different operating conditions. Specifically, the pressure vessel 131 is disposed on the valve body 111, and one end of the valve element 122 away from the baffle 121 is movably disposed in the pressure vessel 131. The pressure vessel 131 has a pressure chamber, in which one end of the spool 122 is movable. Taking the direction shown in fig. 1 as an example, taking the pressure of the fluid at the inlet 1111 of the valve body 111 as P1, the pressure in the hollow cavity 1112 as P2, and the pressure in the pressure container 131 as P3, when the valve element 122 moves downward, so that the bottom end of the valve element 122 is pressed down in the pressure chamber of the pressure container 131, and the pressure in the pressure container 131 is increased, at this time, the fluid at the inlet 1111 of the valve body 111 needs a larger pressure to push the baffle 121 and the valve element 122 to enter the hollow cavity 1112 through the inlet 1111 and then to flow out through the outlet 1113, that is, when the pressure P1 of the fluid at the inlet 1111 is greater than the pressure P3 in the pressure container 131, the fluid can push the baffle 121 to flow out through the inlet 1111 of the valve body 111, so that the adjustment of the fluid pressure can be realized, the pressure of the fluid is increased, and the purpose of adjusting the high-low pressure difference of the water chilling unit is achieved.
Further, the check assembly 120 further includes a spring 123, the spring 123 is sleeved outside the valve element 122, the valve body assembly 110 further includes a valve seat 112, and the valve seat 112 is disposed in the hollow chamber 1112 of the valve body 111 and is close to the outlet 1113. The spring 123 is sleeved on the valve element 122, one end of the spring 123 abuts against the baffle 121, and the other end of the spring 123 abuts against the valve seat 112. The spool 122 moves the flapper 121 relative to the valve seat 112 and places the spring 123 in a compressed or extended state. The valve seat 112 is for ease of positioning the check assembly 120. The valve seat 112 is disposed in a hollow cylindrical shape, one end of the spring 123 abuts against the valve seat 112, so as to avoid the position shift of the valve seat 112, the valve seat 112 is further fixedly connected to the inner wall of the valve body 111, and meanwhile, the valve seat 112 is further provided with a flow passage in the flow direction of the fluid, so that the fluid can flow out of the outlet 1113 of the valve body 111 through the valve seat 112 in the hollow chamber 1112. Preferably, a protruding support may be provided on the outer wall of the valve seat 112, and the valve seat 112 is fixed in the valve body 111 by the support without affecting the flow of the fluid. Of course, in other embodiments of the present invention, the valve body 111 may have other similar structures as long as the fixation of the valve seat 112 and the fluid flow can be ensured. In the present embodiment, the valve seat 112 has a partial sectional shape of L, and the vertical portion of the L-shaped valve seat 112 is located inside the spring 123 to ensure the movement path of the compression of the spring 123 and avoid the excessive compression of the spring 123; the horizontal portion of the L-shaped valve seat 112 is adapted to contact the bottom end of the spring 123 to limit the position of the spring 123. When the flap 121 carries the spool 122 downward, the flap 121 compresses the spring 123 against the valve seat 112, ensuring fluid flow. Meanwhile, when the check structure 100 has no fluid flow, the baffle plate 121 is restored to seal the inlet 1111 of the valve body 111 by the elastic force of the spring 123. Preferably, the pressure vessel 131 is fixed to the valve seat 112, which facilitates movement of the end of the valve spool 122 in the compression chamber of the compression vessel. Further, the valve body assembly 110 further includes a retainer ring 113, and the retainer ring 113 is disposed in the outlet 1113 of the valve body 111. The retainer ring 113 can block the position of the valve seat 112, so that the valve seat 112 is reliably fixed. Of course, in other embodiments of the present invention, the valve seat 112 may be integrally formed with the valve body 111.
The check structure 100 of the present invention adds the pressure container 131 to the valve body assembly 110, when the fluid flows into the check structure 100 from the inlet 1111 of the valve body 111, the fluid pushes the baffle plate 121 to drive the valve element 122 to move along the direction shown in fig. 1 under the action of the pressure, at this time, the end of the valve element 122 presses down in the pressure container 131, at this time, the pressure in the pressure container 131 increases, and the fluid needs to push the baffle plate 121 to flow out through the outlet 1113 of the valve body 111 under the action of a larger pressure, so that the pressure when the fluid flows out can be increased, and the purpose of adjusting the pressure of the fluid flowing out can be achieved, so as to adjust the high-low pressure difference of the water chilling unit.
As an implementation, the pressure increasing assembly 130 further includes a pressure increasing plate 132, the pressure increasing plate 132 is disposed on the valve core 122, and the valve core 122 drives the pressure increasing plate 132 to move in the pressure vessel 131. The pressure increasing plate 132 is used to increase the contact area between the end of the valve core 122 and the pressure chamber of the pressure container 131, so as to increase the stress area, reduce the pressure, ensure the uniform stress of the pressure increasing plate 132, and improve the reliability. Preferably, the pressure increasing plate 132 has a flat plate shape, and the pressure increasing plate 132 is fixed to an end portion of the spool 122 by a fixing member. In principle, the material of the pressure increasing plate 132 is not limited as long as the purpose of increasing the force bearing area and reducing the pressure can be achieved. Further, the cross-sectional area of the pressure increasing plate 132 is larger than that of the spool 122, and the cross-sectional area of the pressure increasing plate 132 is equal to or smaller than that of the inside of the pressure vessel 131. That is, the edge of the pressure increasing plate 132 protrudes the end surface of the valve element 122 in the circumferential direction, and the pressure increasing plate 132 can also reciprocate in the pressure vessel 131, so that the contact area of the pressure increasing plate 132 with the air of the pressure vessel 131, the pressure increasing effect can be ensured.
Preferably, the pressure in the pressure vessel 131 can be adjusted in such a way that the pressure vessel has different operating conditions.
As one possible implementation. The pressure increasing assembly 130 further includes a first branch 133 and a first valve 134, the first branch 133 is connected to the inner cavity of the pressure vessel 131 and the hollow cavity 1112 of the valve body 111, and the first valve 134 is disposed on the first branch 133 and controls the on/off of the first branch 133. One end of the first branch path 133 communicates with the pressure chamber of the pressure vessel 131, and the other end of the first branch path 133 communicates with the hollow chamber 1112 of the valve body 111. When the water chilling unit does not need to be pressurized, the first valve 134 is opened, the first branch 133 communicates the pressure chamber of the pressure container 131 with the hollow chamber 1112 of the valve body 111, at this time, the pressure P3 of the pressure container 131 is equal to the pressure P2 in the hollow chamber 1112, and the fluid can push the baffle plate 121 to drive the valve element 122 to press down without being pressurized, because the first valve 134 is always opened, the pressure P3 of the pressure container 131 is always equal to the pressure P2 in the hollow chamber 1112, and the fluid can flow out through the hollow chamber 1112 and the outlet 1113 through the inlet 1111 of the valve body 111. When the water chilling unit needs to be pressurized, the first valve 134 is closed, at this time, the first branch 133 is no longer communicated with the pressure chamber of the pressure container 131 and the hollow chamber 1112 of the valve body 111, and the fluid pushes the baffle plate 121 to drive the valve element 122 to move downward, so that the bottom end of the valve element 122 is pressed down in the pressure chamber of the pressure container 131, and the pressure in the pressure container 131 is increased. At this time, when the pressure P1 of the fluid at the inlet 1111 is greater than the pressure P3 in the pressure vessel 131, the fluid can push the baffle 121 to flow out from the inlet 1111 of the valve body 111.
As an implementation manner, the pressure increasing assembly 130 further includes a second branch 135 and a second valve 136, the second branch 135 communicates with the inner cavity and the high-pressure end of the pressure container 131, and the second valve 136 is disposed on the second branch 135 and controls on/off of the second branch 135. One end of the second branch 135 is connected to the pressure chamber of the pressure vessel 131, and the other end of the second branch 135 is connected to the high pressure side. The pressure at the high pressure end is noted as P4, where the pressure at P4 is greater than the pressure at P2. When the chiller needs to be pressurized, the second valve 136 is opened, and the second branch 135 connects the pressure cavity of the pressure container 131 with the high-pressure end, at this time, the pressure P3 in the pressure container 131 is equal to the pressure P4 at the high-pressure end. The fluid flowing through the check structure 100 requires the pressure P1 of the fluid at the inlet 1111 of the valve body 111 to be greater than the pressure P3 of the pressure container 131, at this time, the fluid can push the baffle 121 to drive the valve element 122 to move and open the inlet 1111, because the second valve 136 is always open, the pressure P3 of the pressure container 131 is always equal to the pressure P4 at the high pressure end, and the fluid flows out through the hollow chamber 1112 and the outlet 1113 through the inlet 1111 of the valve body 111. Therefore, the pressure of fluid flowing out can be increased, the high-low pressure difference of the water chilling unit can be adjusted, and the stable operation of the water chilling unit is guaranteed.
Of course, the first branch 133 and the first valve 134, and the second branch 135 and the second valve 136 may be used alone or in combination. In the above embodiments, the method of individually using the pressure regulating valve is described, and thus, the description is not repeated herein, and only the method of using the pressure regulating valve in combination with the first branch 133 and the first valve 134, and the second branch 135 and the second valve 136 is described. When the water chilling unit does not need pressurization, the first valve 134 is opened, the second valve 136 is closed, the first branch 133 is communicated with the pressure cavity of the pressure container 131 and the hollow cavity 1112 of the valve body 111, the second branch 135 is not communicated with the pressure cavity and the high-pressure end of the pressure container 131, at this time, the pressure P3 of the pressure container 131 is equal to the pressure P2 in the hollow cavity 1112, the fluid can push the baffle 121 to drive the valve element 122 to press down without pressurization, because the first valve 134 is always opened, the pressure P3 of the pressure container 131 is always equal to the pressure P2 in the hollow cavity 1112, and the fluid can flow out through the hollow cavity 1112 and the outlet 1113 through the inlet 1111 of the valve body 111. When the water chilling unit needs to be pressurized, the first valve 134 is closed, the second valve 136 is opened, the first branch 133 does not communicate the pressure cavity of the pressure container 131 with the hollow cavity 1112 of the valve body 111, the second branch 135 communicates the pressure cavity of the pressure container 131 with the high-pressure end, and at the moment, the pressure P3 in the pressure container 131 is equal to the pressure P4 at the high-pressure end. To enable the fluid to flow through the check structure 100, the pressure P1 of the fluid at the inlet 1111 of the valve body 111 needs to be higher than the pressure P3 of the pressure container 131, at this time, the fluid can push the baffle 121 to drive the valve element 122 to move and open the inlet 1111, since the second valve 136 is always open, the pressure P3 of the pressure container 131 is always equal to the pressure P4 of the high pressure end, and the fluid flows out through the hollow chamber 1112 and the outlet 1113 via the inlet 1111 of the valve body 111. Therefore, the pressure of fluid flowing out can be increased, the high-low pressure difference of the water chilling unit can be adjusted, and the stable operation of the water chilling unit is guaranteed. When the water chilling unit needs to be pressurized strongly, the first valve 134 and the second valve 136 are closed, at this time, the first branch circuit 133 is no longer communicated with the pressure chamber of the pressure container 131 and the hollow chamber 1112 of the valve body 111, the second branch circuit 135 is not communicated with the pressure chamber and the high pressure end of the pressure container 131, the fluid pushes the baffle plate 121 to drive the valve core 122 to move downwards, so that the bottom end of the valve core 122 is pressed in the pressure chamber of the pressure container 131, and the pressure in the pressure container 131 is increased. At this time, when the pressure P1 of the fluid at the inlet 1111 is greater than the pressure P3 in the pressure vessel 131, the fluid can push the baffle 121 to flow out from the inlet 1111 of the valve body 111.
Preferably, the first valve 134 and the second valve 136 may be solenoid valves or other types of valves, respectively. The control device of the water chilling unit can acquire the system required pressure of the water chilling unit, a first preset pressure value, a second preset pressure value and a third preset pressure value are stored in the control device, the system required pressure of the water chilling unit is compared and judged with the first preset pressure value, the second preset pressure value and the third preset pressure value, and then the on-off of the first valve 134 and the second valve 136 is controlled, so that the regulation of the pressure of fluid outflow can be realized. That is to say, the pressure of the fluid flowing out of the check structure 100 can be adjusted according to the pressure required by the actual system of the water chilling unit, so that the pressure of the fluid flowing out reaches the required pressure value, and the purpose of adjusting the high-low pressure difference of the water chilling unit is further achieved. Moreover, the water chilling unit does not need to be pressurized, and needs to be pressurized and the powerful pressurization respectively correspond to the normal pressure state, the first pressurization state and the second pressurization state of the check structure 100. When the pressure required by the system is smaller than a first preset pressure value, the check structure 100 is in a normal pressure state; when the pressure required by the system is greater than the first preset pressure value and less than the second preset pressure value, the check structure 100 is in a first pressurization state; when the pressure required by the system is greater than a second preset pressure value, the check structure 100 is in a second pressurization state; moreover, when the pressure required by the system exceeds a third preset pressure value, the first valve 134 is opened, and the first branch 133 is communicated with the pressure cavity of the pressure container 131 and the hollow cavity 1112 of the valve body 111, so that the pressure in the pressure container 131 can be properly released, the check structure 100 is ensured to work reliably, the safety problem caused by overlarge pressure is avoided, and the reliability of the operation of the water chilling unit is improved.
The invention also provides a control method of the check structure 100, which is applied to the check structure 100 with any technical characteristics, and comprises the following steps:
acquiring the pressure required by a water chilling unit system;
adjusting the pressurization assembly 130 of the check structure 100 according to the pressure required by the system to control the pressure state of the check structure 100;
Specifically, the check structure 100 firstly obtains the pressure required by the system of the water chilling unit, and then adjusts the pressure boost assembly 130 of the check structure 100 according to the pressure required by the system of the water chilling unit, i.e. controls the on-off of the first valve 134 and the second valve 136, so as to adjust the pressure state of the check structure 100, so that the check structure 100 adjusts the pressure of the fluid flowing out of the valve body 111, and further, the adjustment of the high-low pressure difference of the water chilling unit is realized.
Further, the pressure state of the check structure 100 includes a normal pressure state, a first pressurization state and a second pressurization state;
when the pressure required by the system is smaller than a first preset pressure value, the check structure 100 is in a normal pressure state;
when the pressure required by the system is greater than or equal to the first preset pressure value and less than or equal to the second preset pressure value, the check structure 100 is in a first pressurization state;
when the system pressure is greater than the second predetermined pressure, the check structure 100 is in the second pressurized state.
In the invention, the check structure 100 has three working states, namely a normal pressure state, a first pressurization state and a second pressurization state of the check structure 100, when the check structure 100 is in the normal pressure state, the water chilling unit does not need to be pressurized, and when the check structure 100 is in the first pressurization state, the water chilling unit needs to be pressurized; when the check structure 100 is in the second pressurized state, the chiller needs to be strongly pressurized. The on-off of the first valve 134 and the second valve 136 is controlled according to the pressure required by the system of the water chilling unit to adjust the pressure of the fluid flowing out of the check structure 100, so that the pressure of the fluid flowing out reaches the required pressure value, and further the adjustment of the high-low pressure difference of the water chilling unit is realized.
When the check structure 100 is in the normal pressure state, the pressure increasing assembly 130 is adjusted to equalize the pressure in the pressure container 131 in the pressure increasing assembly 130 with the pressure in the hollow cavity 1112 of the valve body 111 of the valve body assembly 110 of the check structure 100. The method specifically comprises the following steps: the first valve 134 on the first branch 133 of the check structure 100 is open, the second valve 136 on the second branch 135 of the check structure 100 is closed, and the pressure in the pressure vessel 131 in the pressure intensifier assembly 130 is equal to the pressure in the hollow cavity 1112 of the valve body 111 of the valve body assembly 110 of the check structure 100. When the water chilling unit does not need to be pressurized, the pressure required by the system is smaller than a first preset pressure value, the check structure 100 is in a normal pressure state, the first valve 134 is opened, the second valve 136 is closed, the first branch 133 is communicated with the pressure cavity 1112 of the pressure container 131 and the hollow cavity 1112 of the valve body 111, the second branch 135 is not communicated with the pressure cavity and the high pressure end of the pressure container 131, at this time, the pressure P3 of the pressure container 131 is equal to the pressure P2 in the hollow cavity 1112, and the fluid can push the baffle 121 to drive the valve element 122 to press down without pressurization.
When the check structure 100 is in the first pressurized state, the pressurizing assembly 130 is adjusted such that the pressure in the pressure vessel 131 in the pressurizing assembly 130 is greater than the pressure in the hollow cavity 1112 of the valve body 111 of the valve body assembly 110 of the check structure 100. The method specifically comprises the following steps: the first valve 134 on the first branch 133 of the check structure 100 is closed, the second valve 136 on the second branch 135 of the check structure 100 is opened, and the pressure in the pressure vessel 131 in the pressure intensifying assembly 130 is equal to the pressure in the high pressure side to which the second branch 135 is connected. When the water chilling unit needs to be pressurized, the pressure required by the system is greater than the first preset pressure value and less than the second preset pressure value, the check structure 100 is in the first pressurization state, the first valve 134 is closed, the second valve 136 is opened, the first branch 133 is not communicated with the pressure cavity 1112 of the pressure container 131 and the hollow cavity 1112 of the valve body 111, the second branch 135 is communicated with the pressure cavity and the high pressure end of the pressure container 131, and at this time, the pressure P3 in the pressure container 131 is equal to the pressure P4 at the high pressure end. The fluid flowing through the check structure 100 requires the pressure P1 of the fluid at the inlet 1111 of the valve body 111 to be greater than the pressure P3 of the pressure container 131, at this time, the fluid can push the baffle 121 to drive the valve element 122 to move and open the inlet 1111, because the second valve 136 is always open, the pressure P3 of the pressure container 131 is always equal to the pressure P4 at the high pressure end, and the fluid flows out through the hollow chamber 1112 and the outlet 1113 through the inlet 1111 of the valve body 111. Therefore, the pressure of the fluid flowing out can be increased, the high-low pressure difference of the water chilling unit can be adjusted, and the stable operation of the water chilling unit is ensured.
When the check structure 100 is in the second pressurization state, the pressure increasing assembly 130 is adjusted to make the pressure container 131 in the pressure increasing assembly 130 in a sealed state, and the valve core 122 in the check structure 100 is pressed down in the pressure container 131 in the pressure increasing assembly 130. The method specifically comprises the following steps: the first valve 134 on the first branch 133 of the check structure 100 is closed, the second valve 136 on the second branch 135 of the check structure 100 is closed, and the valve spool 122 in the check structure 100 is depressed in the pressure vessel 131 in the pressure intensifying assembly 130. When the water chilling unit needs to be pressurized powerfully, the pressure required by the system is greater than a second preset pressure value, the check structure 100 is in a second pressurization state, the first valve 134 and the second valve 136 are both closed, at this time, the first branch 133 is not communicated with the pressure cavity 1112 of the pressure container 131 and the hollow cavity 1112 of the valve body 111 any more, the second branch 135 is not communicated with the pressure cavity and the high-pressure end of the pressure container 131, and the fluid pushes the baffle 121 to drive the valve element 122 to move downwards, so that the bottom end of the valve element 122 is pressed down in the pressure cavity of the pressure container 131, and the pressure in the pressure container 131 is increased. At this time, when the pressure P1 of the fluid at the inlet 1111 is greater than the pressure P3 in the pressure vessel 131, the fluid can push the baffle 121 to flow out from the inlet 1111 of the valve body 111.
Further, when the system pressure reaches a third predetermined pressure, the pressure increasing assembly 130 is adjusted to release the pressure in the pressure vessel 130. Specifically, the first valve 134 is opened and the first valve 134 is operated to release the pressure appropriately. When the pressure required by the system exceeds a third preset pressure value, the first valve 134 is opened, the first branch 133 is communicated with the pressure cavity of the pressure container 131 and the hollow cavity 1112 of the valve body 111, and at this time, the pressure in the pressure container 131 can be properly released, so that the working reliability of the check structure 100 is ensured, the safety problem caused by overlarge pressure is avoided, and the reliability of the operation of the water chilling unit is improved.
The invention also provides a water chilling unit, which comprises a connecting pipeline and the check structure 100 in the embodiment, wherein the check structure 100 is arranged in the connecting pipeline. The water chilling unit ensures accurate flowing direction of fluid through the check structure 100, meanwhile, the check structure 100 also has a pressurization function so as to realize high-low pressure difference adjustment of the water chilling unit and ensure stable operation of the water chilling unit, and meanwhile, the check structure 100 is provided with the pressurization function and can cancel a back pressure valve so as to optimize the structure of the water chilling unit, further improve the controllability of the water chilling unit and reduce the complexity of the structure.
The invention also provides air conditioning equipment which comprises the water chilling unit in the embodiment. The air conditioning equipment provided by the invention can ensure stable operation by adopting the water chilling unit, improves the working reliability and is convenient to use.
The technical features of the embodiments described above can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present 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 (16)
1. A check structure for use in a chiller, comprising:
the valve body assembly (110) comprises a valve body (111), the valve body (111) is provided with an inlet (1111), a hollow cavity (1112) and an outlet (1113), and the inlet (1111) and the outlet (1113) are respectively communicated with the hollow cavity (1112);
a check assembly (120) movably mounted in the hollow chamber (1112) to open or close the inlet (1111); and
a pressurizing assembly (130) comprising a pressure-adjustable pressure vessel (131), wherein the pressure vessel (131) is arranged on the check assembly (120), and one end of the check assembly (120) far away from the inlet (1111) is movably arranged in the pressure vessel (131);
the pressure state of the check structure comprises a normal pressure state and a pressurization state;
when the pressure required by the system of the water chilling unit is smaller than a first preset pressure value, the non-return structure is in a normal pressure state;
when the pressure required by the system of the water chilling unit is greater than or equal to the first preset pressure value, the check structure is in a pressurization state.
2. The check structure according to claim 1, wherein the check assembly (120) comprises a baffle plate (121) and a valve core (122), the baffle plate (121) is mounted on the valve core (122), the valve core (122) is movably disposed in the valve body (111), and the valve core (122) drives the baffle plate (121) to open or close the inlet (1111).
3. The check structure of claim 2, characterized in that the pressure increasing assembly (130) further comprises a pressure increasing plate (132), the pressure increasing plate (132) being disposed on the valve spool (122), the valve spool (122) moving the pressure increasing plate (132) in the pressure vessel (131).
4. The check structure according to claim 3, characterized in that the cross-sectional area of the pressure increasing plate (132) is larger than that of the spool (122), and the cross-sectional area of the pressure increasing plate (132) is equal to or smaller than that of the inside of the pressure vessel (131).
5. The check structure according to claim 1, wherein the pressure increasing assembly (130) further comprises a first branch (133) and a first valve (134), the first branch (133) communicates the inner cavity of the pressure vessel (131) and the hollow cavity (1112) of the valve body (111), and the first valve (134) is disposed on the first branch (133) and controls the on-off of the first branch (133).
6. The check structure according to claim 1 or 5, wherein the pressure increasing assembly (130) further comprises a second branch (135) and a second valve (136), the second branch (135) is communicated with the inner cavity and the high-pressure end of the pressure container (131), and the second valve (136) is arranged on the second branch (135) and controls the on-off of the second branch (135).
7. The check structure according to claim 2, wherein the check assembly (120) further comprises a spring (123), the valve body assembly (110) further comprises a valve seat (112), the valve seat (112) is arranged in the valve body (111), the spring (123) is sleeved on the valve core (122), one end of the spring (123) abuts against the baffle plate (121), and the other end of the spring (123) abuts against the valve seat (112);
the valve core (122) drives the baffle plate (121) to move relative to the valve seat (112) and enables the spring (123) to be in a compressed or extended state.
8. The check structure according to claim 1, characterized in that the valve body assembly (110) further comprises a check ring (113), the check ring (113) being disposed in the outlet (1113) of the valve body (111).
9. A check structure control method applied to a check structure according to any one of claims 1 to 8, comprising the steps of:
acquiring the pressure required by a water chilling unit system;
adjusting a pressurization component (130) of the check structure according to the pressure required by the system to control the pressure state of the check structure;
the check structure regulates fluid pressure;
the pressure state of the check structure comprises a normal pressure state and a pressurization state;
when the pressure required by the water chilling unit system is smaller than a first preset pressure value, the non-return structure is in a normal pressure state;
when the pressure required by the water chilling unit system is greater than or equal to the first preset pressure value, the check structure is in a pressurization state.
10. The control method of a check structure according to claim 9, wherein the pressurized state includes a first pressurized state and a second pressurized state;
when the pressure required by the system is greater than or equal to the first preset pressure value and less than or equal to a second preset pressure value, the non-return structure is in a first pressurization state;
and when the pressure required by the system is greater than the second preset pressure value, the check structure is in a second pressurization state.
11. The method for controlling a check structure according to claim 10, wherein when the check structure is in a normal pressure state, the pressure increasing assembly (130) is adjusted to equalize the pressure in the pressure container (131) in the pressure increasing assembly (130) with the pressure in the hollow cavity (1112) of the valve body (111) of the valve body assembly (110) of the check structure.
12. A control method of a check structure according to claim 10, characterized in that when the check structure is in a first pressurized state, the pressurizing assembly (130) is adjusted such that the pressure in the pressure vessel (131) in the pressurizing assembly (130) is greater than the pressure in the hollow cavity (1112) of the valve body (111) of the valve body assembly (110) of the check structure.
13. The control method of the check structure according to claim 10, characterized in that when the check structure is in the second pressurization state, the pressurization assembly (130) is adjusted to make the pressure container (131) in the pressurization assembly (130) in a closed state, and the check assembly (120) is pressed down in the pressurization assembly (130) by the pressure container (131).
14. The control method of check structure according to claim 13, characterized in that when the system required pressure reaches a third preset pressure value, the pressure increasing assembly (130) is adjusted to release the pressure of the pressure vessel (131).
15. A water chilling unit, characterized by comprising a connection line and a non-return structure (100) according to any one of claims 1 to 8;
the check structure (100) is disposed in the connection line.
16. An air conditioning apparatus comprising the chiller of claim 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710313354.5A CN106949265B (en) | 2017-05-05 | 2017-05-05 | Air conditioning equipment, water chilling unit, non-return structure and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710313354.5A CN106949265B (en) | 2017-05-05 | 2017-05-05 | Air conditioning equipment, water chilling unit, non-return structure and control method thereof |
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| Publication Number | Publication Date |
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| CN106949265A CN106949265A (en) | 2017-07-14 |
| CN106949265B true CN106949265B (en) | 2023-01-24 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3134394A (en) * | 1962-05-29 | 1964-05-26 | Ohta Tsunetaro | Check valves |
| CH596485A5 (en) * | 1975-08-20 | 1978-03-15 | Sulzer Ag | |
| CN201236994Y (en) * | 2008-08-15 | 2009-05-13 | 中芯国际集成电路制造(上海)有限公司 | Reflow-stopping reaction valve |
| CN203656285U (en) * | 2014-01-08 | 2014-06-18 | 长春工程学院 | One-way valve with pressure feedback control |
| CN205298685U (en) * | 2016-01-06 | 2016-06-08 | 珠海格力电器股份有限公司 | Check valve and compressor with same |
| CN206816881U (en) * | 2017-05-05 | 2017-12-29 | 珠海格力电器股份有限公司 | Air conditioning equipment, water chilling unit and non-return structure thereof |
| CN207728970U (en) * | 2017-11-29 | 2018-08-14 | 温州胜西姆真空科技有限公司 | A kind of novel screw compressor intake valve |
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Effective date of registration: 20231026 Address after: 519070, 1st Floor, Building 7, No. 789 Jinji Road, Qianshan, Zhuhai, Guangdong Province Patentee after: Zhuhai Gree Green Control Technology Co.,Ltd. Address before: 519070, Jinji Hill Road, front hill, Zhuhai, Guangdong Patentee before: GREE ELECTRIC APPLIANCES,Inc.OF ZHUHAI |
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