CN117515237B - Balancing valve, refrigerating device and control method - Google Patents
Balancing valve, refrigerating device and control method Download PDFInfo
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- CN117515237B CN117515237B CN202410008579.XA CN202410008579A CN117515237B CN 117515237 B CN117515237 B CN 117515237B CN 202410008579 A CN202410008579 A CN 202410008579A CN 117515237 B CN117515237 B CN 117515237B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 66
- 238000005338 heat storage Methods 0.000 claims abstract description 60
- 239000012782 phase change material Substances 0.000 claims abstract description 25
- 238000005057 refrigeration Methods 0.000 claims abstract description 18
- 239000012530 fluid Substances 0.000 claims abstract description 5
- 239000012188 paraffin wax Substances 0.000 claims description 33
- 238000005485 electric heating Methods 0.000 claims description 27
- 238000007789 sealing Methods 0.000 claims description 11
- 230000008018 melting Effects 0.000 description 12
- 238000002844 melting Methods 0.000 description 12
- 230000008859 change Effects 0.000 description 9
- 239000007789 gas Substances 0.000 description 9
- 239000007787 solid Substances 0.000 description 8
- 238000009413 insulation Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000012546 transfer Methods 0.000 description 7
- 229940057995 liquid paraffin Drugs 0.000 description 5
- 230000005494 condensation Effects 0.000 description 4
- 238000009833 condensation Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 3
- 230000009878 intermolecular interaction Effects 0.000 description 2
- 238000010257 thawing Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 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
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Classifications
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/18—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on either side
- F16K17/19—Equalising valves predominantly for tanks
-
- 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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
-
- 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
- F16K49/00—Means in or on valves for heating or cooling
- F16K49/002—Electric heating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/042—Air treating means within refrigerated spaces
- F25D17/047—Pressure equalising devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
- F25D21/08—Removing frost by electric heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Temperature-Responsive Valves (AREA)
Abstract
The invention provides a balance valve, a refrigerating device and a control method, comprising the following steps: the device comprises a shell and a connecting pipe, wherein the inside of the connecting pipe is used for a channel for circulating fluid, and one end of the connecting pipe is provided with a valve body for opening or closing the channel; the heat storage cavity is arranged in the shell, surrounds the connecting pipe, is arranged corresponding to the valve body, and is internally provided with a phase change material and a pressure sensor for detecting the pressure in the heat storage cavity; the heating component is arranged corresponding to the heat storage cavity, and the phase change material in the heat storage cavity is heated by the heating component; the controller is in signal connection with the pressure sensor and the heating component, when the pressure sensor detects that the pressure in the heat storage cavity reaches a preset value, the pressure sensor transmits a signal to the controller, and the controller turns on or turns off the heating component. The balance valve, the refrigeration device and the control method solve the technical problems that the balance valve in the refrigeration equipment in the related art needs to be heated continuously, the service life of a heating assembly is greatly shortened, and the refrigeration cost is high.
Description
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to a balance valve, a refrigeration device and a control method.
Background
Because the internal temperature of the refrigerating device such as a low-temperature preservation box is too low and the characteristic of thermal expansion and contraction of gas is added, the pressure difference is formed between the inside and the outside of the refrigerating device, and the door opening is difficult. In order to normally open the door, a balance valve is arranged on the door body of the refrigerating device, and the pressure difference between the inside and the outside is balanced by a spring. However, when the outside hot and humid air meets the low-temperature air in the refrigerating device, the air can be condensed and frozen near the top sheet, and the normal operation of the balance valve is seriously affected.
In order to prevent the occurrence of the above situation, a circle of electric heating is generally arranged around the balance valve, and the gas close to the balance valve is heated to avoid the condensation and icing of the gas liquefaction around the balance valve, so that the balance valve can always normally operate, and the door body can normally open. However, the electric heating needs to be continuously operated, which not only puts high demands on the service life and reliability of the electric heating, but also increases the operation energy consumption of the refrigerating device and increases the refrigerating cost.
Accordingly, the prior art is subject to further development.
Disclosure of Invention
The invention aims to overcome the technical defects and provide a balance valve, a refrigeration device and a control method, so as to solve the technical problems that the balance valve in the refrigeration equipment in the related art needs to be heated continuously, the service life of a heating assembly is greatly shortened, and the refrigeration cost is high.
In order to achieve the technical purpose, the invention adopts the following technical scheme: there is provided a balancing valve comprising: a housing; the connecting pipe is arranged in the shell, a channel for circulating fluid is formed in the connecting pipe, one end of the connecting pipe is provided with a valve body, and the valve body is used for opening or closing the channel; the heat storage cavity is arranged in the shell, surrounds the connecting pipe, is correspondingly arranged with the valve body, and is internally provided with phase change materials and a pressure sensor for detecting the pressure in the heat storage cavity; the heating component is arranged corresponding to the heat storage cavity, and is used for heating the phase change material in the heat storage cavity; and the controller is in signal connection with the pressure sensor and the heating component, and when the pressure sensor detects that the pressure in the heat storage cavity reaches a preset value, the pressure sensor transmits a signal to the controller, and the controller turns on or turns off the heating component.
Further, the phase change material is paraffin, and/or the heating component is an electric heating wire, the heating component is arranged on the outer side of the shell, the heating component is arranged around the shell, and the controller is used for switching on or switching off the heating component through a control circuit.
Further, the casing includes top cap, lateral wall, and end cover, and the one end and the top cap of lateral wall are connected, and the other end and the end cover of lateral wall are connected, and the valve body is fixed on the end cover, and the one end and the top cap connection of valve body are kept away from to the connecting pipe.
Further, the balance valve further comprises a heat insulation plate, the connecting pipe penetrates through the heat insulation plate, and the heat insulation plate, the side wall and the end cover enclose a heat storage cavity.
Further, a connecting part is arranged on the end cover and positioned on the outer side of the shell, and the connecting part is abutted with the heating component.
Further, the balance valve further comprises a heat conducting rib, the heat conducting rib is arranged in the heat storage cavity, one end of the heat conducting rib is connected with the valve body, and the other end of the heat conducting rib is arranged at intervals with the side wall, so that a circulation gap for flowing the phase change material is arranged between the heat conducting rib and the side wall.
Further, the plurality of heat conducting ribs are arranged around the valve body, and the plurality of heat conducting ribs are arranged at intervals.
Further, the balance valve further comprises a sealing ring, the sealing ring is connected with the top cover, a through hole is formed in the middle of the sealing ring, and one end of the connecting pipe penetrates through the through hole.
A refrigerating device comprises a door body, wherein the door body is provided with the balance valve.
A control method suitable for use in a refrigeration apparatus as described above, the control method comprising: setting a minimum pressure value P1 and a maximum pressure value P2 when phase change materials in the heat storage cavity are subjected to phase change, detecting a real-time pressure value P in the heat storage cavity according to the pressure sensor, and judging the magnitudes of the real-time pressure value P, the minimum pressure value P1 and the maximum pressure value P2; if P is less than or equal to P1, the controller starts the heating component; if P is more than or equal to P2, the controller turns off the heating component.
The beneficial effects are that:
1. the balance valve is matched with the electric heating wire, and the phase change latent heat of paraffin is utilized to store and release energy, so that the electric heating is intermittently operated, and the service life of the electric heating is prolonged.
2. The balance valve is matched with the electric heating wire, and the paraffin two-phase and pressure sensor is utilized, so that the running time of electric heating is reduced, and electric energy is saved.
3. By adopting the refrigerating device, the heat conduction rib is added to strengthen the heating of the balance valve, so that the heating is more uniform, the electric heating time is greatly shortened, and the energy consumption is reduced.
Drawings
FIG. 1 is a cross-sectional view of a balancing valve employed in an embodiment of the present invention;
FIG. 2 is an enlarged partial view of portion A of FIG. 1;
FIG. 3 is a schematic view of the heat transfer rib of the balancing valve employed in an embodiment of the present invention;
FIG. 4 is a schematic illustration of the flow gap of a balancing valve employed in an embodiment of the present invention;
FIG. 5 is a schematic view of the construction of a heat shield for a balancing valve employed in an embodiment of the present invention;
FIG. 6 is a schematic diagram of the seal ring of the balancing valve employed in an embodiment of the present invention;
fig. 7 is a partial cross-sectional view of a refrigeration unit employed in an embodiment of the present invention.
Wherein the above figures include the following reference numerals:
1. a housing; 11. a top cover; 12. a sidewall; 13. an end cap; 131. a connection part; 2. a connecting pipe; 21. a channel; 22. a valve body; 3. a heat storage cavity; 31. a pressure sensor; 32. paraffin wax; 4. a heating member; 41. a top; 42. a bottom; 5. a heat insulating plate; 6. a protective cover; 7. a heat conducting rib; 8. a seal ring; 81. a through hole; 9. a door body; 10. a flow gap.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
According to an embodiment of the present invention, there is provided a balance valve, referring to fig. 1 to 7, including: a housing 1; a connection pipe 2, the connection pipe 2 being provided in the housing 1, a passage 21 for circulating fluid being formed inside the connection pipe 2, one end of the connection pipe 2 being provided with a valve body 22, the valve body 22 being used for opening or closing the passage 21; the heat storage cavity 3 is arranged in the shell 1, the heat storage cavity 3 is arranged around the connecting pipe 2, the heat storage cavity 3 is arranged corresponding to the valve body 22, and the heat storage cavity 3 is internally provided with a phase change material and a pressure sensor 31 for detecting the pressure in the heat storage cavity 3; the heating component 4 is arranged corresponding to the heat storage cavity 3, and the phase change material in the heat storage cavity 3 is heated by the heating component 4; and the controller is in signal connection with the pressure sensor 31 and the heating component 4, and when the pressure sensor 31 detects that the pressure in the heat storage cavity 3 reaches a preset value, the controller transmits a signal to the controller, and the controller turns on or off the heating component 4.
In the balance valve of the present embodiment, a connection pipe 2 is provided in a housing 1 of the balance valve, a passage 21 through which gas flows is provided in the connection pipe 2, a valve body 22 is provided at one end of the connection pipe 2, and the valve body 22 opens or closes the passage 21 so as to achieve that the gas pressure flow at both ends of the connection pipe 2 of the balance valve reaches an equilibrium state. A heat storage chamber 3 is also provided inside the housing 1, the heat storage chamber 3 surrounding the connecting pipe 2 and the heat storage chamber 3 being provided in correspondence with the valve body 22. The phase change material and the pressure sensor 31 are arranged in the heat storage chamber 3, the heating member 4 is arranged around the housing 1 of the balancing valve, and the heating member 4 is arranged in correspondence with the heat storage chamber 3. The controller is in signal connection with the pressure sensor 31 and the heating element, respectively. When the pressure difference between the two ends of the connecting pipe 2 increases to a certain degree, the valve body 22 of the balance valve is opened, and the outside high-temperature high-humidity gas and the inside low-temperature gas are converged to form condensation and further freeze, so that the influence on the reset of the valve plate of the valve body 22 is limited. At this time, the phase change material is in a solid state, the pressure in the heat storage cavity 3 is small, and the controller starts the heating part 4 to heat the valve body 22. The phase change material absorbs heat while heating, and the heat of the heating part 4 is transferred to the valve body 22 by taking the phase change material as a heat transfer medium between the heating part 4 and the valve body 22, so that the melting of peripheral frost on the inner side of the balance valve is promoted, and the normal opening of the valve body 22 is ensured. When the phase change material absorbs heat and gradually changes from solid to liquid, the pressure in the heat storage cavity 3 is increased, and when the set maximum pressure value is reached, the controller turns off the heating component 4, and the phase change material is completely melted by utilizing waste heat. After that, the temperature is not changed in the phase change process due to the physical characteristics of the phase change material of the liquid, so that the temperature near the balance valve is ensured to be kept stable in the phase change process, and the balance valve can not frost. When the phase-change material is slowly solidified and completely emits phase-change heat, the pressure in the heat storage cavity 3 is reduced to the lowest point, and the controller turns on the heating component 4 again. And the heating part 4 stops running in the period of closing the heating part 4, so that not only is the energy consumption effectively saved, but also the heat carried by the heating part 4 is partially discharged, the temperature is reduced, and the service life of the heating part 4 is greatly prolonged. The balance valve of this embodiment has solved the balanced valve among the refrigeration plant among the related art and has needed continuous heating, has shortened heating element's life greatly for the higher technical problem of refrigeration cost.
In the balance valve of the present embodiment, the phase change material is paraffin 32. The paraffin 32 is only disposed in the heat storage chamber 3, and when the paraffin 32 receives heat transferred from the heating member 4, internal molecules start to absorb energy, and intermolecular interaction forces gradually decrease, so that the molecular arrangement of the paraffin 32 is changed, thereby allowing the paraffin in a solid state to gradually become fluid. The process of paraffin 32 melting can be summarized in three stages: a primary melting stage, a melting stage and a final melting stage. In the initial melting stage, the temperature of the paraffin 32 gradually increases, intermolecular interaction force starts to decrease, and small depressions in the liquid state appear on the surface of the paraffin 32. As the temperature continues to rise, the paraffin 32 enters the melting stage, the whole paraffin 32 volume gradually changes into liquid, and the molecules start to move freely, so that the pressure in the heat storage cavity 3 reaches the maximum. When the melted paraffin 32 cools to a temperature lower than its melting point, the liquid paraffin 32 gradually solidifies, and molecules are rearranged and form solid crystals, returning to the original solid state, a process called solidification. The minimum temperature of the paraffin 32 after it has entered a steady state should be higher than its melting point, so that it is ensured that the pressure sensor 31 can accurately measure the minimum pressure in the heat storage chamber 3.
In the balance valve of the present embodiment, the heating member 4 is an electric heating wire, the heating member 4 is disposed outside the housing 1, the heating member 4 is disposed around the housing 1, and the controller turns on or off the heating member 4 by a control circuit. The electric heating wire is adopted as the heating component 4, so that the manufacturing cost is low, and the control mode of the electric heating wire is simple.
Referring to fig. 1, in the balance valve of the present embodiment, a housing 1 includes a top cover 11, a side wall 12, and an end cover 13, one end of the side wall 12 is connected to the top cover 11, the other end of the side wall 12 is connected to the end cover 13, a valve body 22 is fixed to the end cover 13, and one end of the connecting pipe 2 away from the valve body 22 is connected to the top cover 11. The two ends of the connecting pipe 2 are respectively connected with the top cover 11 and the end cover 13, and the valve body 22 is fixed on the end cover 13. In the case of using the balance valve, the end cap 13 is located at a low temperature region inside and the top cap 11 is located outside. The passage 21 is opened by the valve body 22 in the connecting pipe 2 so as to communicate the internal and external air pressures, and the internal and external pressure balance is maintained.
Referring to fig. 1 and 2, in the balance valve of the present embodiment, the balance valve further includes a heat insulation plate 5, the connection pipe 2 is disposed through the heat insulation plate 5, and the heat insulation plate 5, the side wall 12 and the end cover 13 enclose a heat storage chamber 3. The heat insulation plate 5 passes through the connecting pipe 2 and forms a heat storage cavity 3 together with the side wall 12 and the end cover 13. The heat shield 5 and the end cap 13 are both composed of a high thermal resistance material to prevent excessive heat dissipation from the paraffin 32 and to maximize heat transfer from the side wall 12.
Referring to fig. 1, in the balance valve of the present embodiment, a connecting portion 131 is provided on the end cap 13, the connecting portion 131 is located outside the housing 1, and the connecting portion 131 abuts against the heating member 4. The connecting portion 131 extends along the outer circumference of the end cover 13 to form a flange, the flange is located at the outer side of the housing 1, and the heating component 4 abuts against the flange, so that the heating component 4 is supported, the heating component 4 can be attached to the side wall 12 more stably, and heat transfer is facilitated.
Referring to fig. 3 and 4, in the balance valve of the present embodiment, the balance valve further includes a heat conduction rib 7, the heat conduction rib 7 is disposed in the heat storage chamber 3, one end of the heat conduction rib 7 is connected with the valve body 22, and the other end of the heat conduction rib 7 is disposed at a distance from the side wall 12, so that a circulation gap 10 through which the phase change material flows is provided between the heat conduction rib 7 and the side wall 12. The heat conducting ribs 7 are arranged in the heat storage cavity 3, one end of the heat conducting ribs 7 is connected with the valve body 22, one end of the heat conducting ribs extends towards the side wall 12, and a circulation gap 10 is arranged between the heat conducting ribs 7 and the side wall 12, so that paraffin 32 can flow and transfer heat more freely.
Referring to fig. 3 and 4, in the balance valve of the present embodiment, the heat conduction ribs 7 are plural, the plural heat conduction ribs 7 are disposed around the valve body 22, and the plural heat conduction ribs 7 are disposed at intervals. The heat conducting ribs 7 in the heat storage cavity 3 are arranged in a plurality and are arranged at intervals around the valve body 22, the heat conducting ribs 7 enable the efficiency of temperature transmission to be improved, heat is transmitted to the valve body 22 more uniformly, and frost melting nearby the low-temperature inner side balance valve is promoted.
Referring to fig. 5, in the balance valve of the present embodiment, the heating member 4 includes a top portion 41 and a bottom portion 42 at both ends, the bottom portion 42 is abutted against the connecting portion 131, and the top portion 41 is disposed opposite to the bottom portion 42; the maximum distance from the top 41 to the bottom 42 is equal to the distance from the heat shield 5 to the end cap 13. When the heating part 4 operates, the paraffin 32 in the heat storage cavity 3 close to the side wall 12 can be simultaneously transferred, so that the heat transfer speed is increased.
Referring to fig. 3 and 5, in the balance valve of the present embodiment, a protection cover 6 is provided on the outside of the housing 1, and the protection cover 6 is provided around the heating member 4 to prevent the heat generated by the heating member 4 from being spread out.
Referring to fig. 3 and 6, in the balance valve of the present embodiment, the balance valve further includes a sealing ring 8, the sealing ring 8 is connected with the top cover 11, a through hole 81 is provided in the middle of the sealing ring 8, and one end of the connection pipe 2 is provided through the through hole 81. The sealing ring 8 is connected with the top cover 11, and the connecting pipe 2 is communicated with the outside air pressure through the through hole 81.
Referring to fig. 7, in the refrigerating apparatus of the present embodiment, the door body 9 is included, and the balance valve as described above is provided on the door body 9. The balance valve is arranged on the door body 9 of the refrigeration device, the valve body 22 is positioned in a low-temperature area inside the box body, the top cover 11 is externally leaked outside the box body, and in order to prevent air leakage between the balance valve and the box body and influence the refrigeration effect, the top cover 11 of the balance valve is provided with the sealing ring 8 to seal the joint of the balance valve and the box body, so that the communication path between the inside and the outside of the box body is realized through the cooperation of the channel 21 of the connecting pipe 2 and the valve body 22.
In the control method of the present embodiment, which is applied to the refrigerating apparatus as described above, the control method includes: setting a minimum pressure value P1 and a maximum pressure value P2 when phase change materials in the heat storage cavity 3 change phase, detecting a real-time pressure value P in the heat storage cavity 3 according to the pressure sensor 31, and judging the magnitudes of the real-time pressure value P, the minimum pressure value P1 and the maximum pressure value P2; if P is less than or equal to P1, the controller starts the heating part 4; if P is more than or equal to P2, the controller turns off the heating component 4. When the pressure P detected by the pressure sensor 31 is smaller than or equal to P1, the paraffin 32 is about to be fully solidified, at the moment, the controller starts the electric heating wire, heat is transferred to the paraffin 32 in the heat storage cavity 3 through the side wall 12, the paraffin 32 is gradually melted, and the pressure in the heat storage cavity 3 is increased; when the pressure P detected by the pressure sensor 31 is greater than or equal to the set maximum pressure value P2, which indicates that the paraffin 32 is nearly completely melted, the controller turns off the electric heating wire, and the remaining solid paraffin 32 is completely melted by using the waste heat. The heat required for defrosting the balancing valve is provided by the heat stored in the liquid paraffin 32, ensuring that the balancing valve itself does not frost. After the paraffin 32 is slowly solidified, the pressure in the heat storage cavity 3 is gradually reduced, and when the set minimum pressure value P1 is reached, the controller starts the electric heating wire, so that the circulation operation is realized. After the electric heating wire is closed, the self heat is gradually reduced, so that the electric heating wire is prevented from being in a high-temperature state all the time, and the service life of the electric heating wire is effectively prolonged. Meanwhile, in the period of closing the electric heating wire, electric energy is saved, and energy consumption is reduced.
In the refrigerating apparatus of the present embodiment, the valve body 22 of the balance valve is a check valve. After the refrigerator is closed, the air pressure in the refrigerator is reduced along with the reduction of the air temperature in the refrigerator. When the pressure difference at two sides of the door body is increased to a certain degree, the one-way valve of the balance valve is opened, and the outside high-temperature and high-humidity gas and the low-temperature gas in the box are converged to form condensation and further freeze, so that the reset of the valve plate in the one-way valve is limited. At this time, the paraffin 32 is in a solid state, the pressure of the heat storage cavity 3 is small, and the electric heating wire continuously runs to heat the one-way valve and the paraffin 32 of the heat storage cavity 3. The heat transfer to the balancing valve promotes the melting of the frost in the vicinity of the balancing valve inside the refrigeration unit. This portion of the defrost water or condensation can be removed by the defrost system of the refrigeration unit itself. In this process the temperature of the wax 32 will rise before going to steady state until the frost inside the balancing valve is completely melted. The minimum temperature of the paraffin 32 after it has reached steady state should be above its melting point. After the frost near the balance valve is completely melted, the electric heating wire continues to operate, the temperature of the paraffin 32 starts to rise continuously after being heated, reaches the self phase change point, and starts to change phase. The liquid paraffin 32 gradually accumulates, and when the liquid paraffin is nearly completely melted, the pressure sensor 31 detects that the pressure reaches the maximum pressure value P2, an electric signal is emitted, the electric heating wire is turned off through the control circuit, and the residual solid paraffin 32 is completely melted by utilizing waste heat. At this time, the pressure difference at both sides of the door body of the refrigeration device is greatly reduced, and the heat required for defrosting is provided by the heat stored in the liquid paraffin. Due to the physical properties of the paraffin 32 itself, the temperature does not change during the phase change, during which the temperature near the balancing valve remains stable. And when the paraffin 32 slowly solidifies and completely emits phase-change heat, the pressure in the heat storage cavity 3 reaches a minimum pressure value P1, and the controller turns on the electric heating wire to start running. When the electric heating wire runs intermittently, the self heat is gradually discharged, so that the temperature is reduced, and the service life of the electric heating wire is greatly prolonged.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Alternatively, specific examples in this embodiment may refer to examples described in the foregoing embodiments, and this embodiment is not described herein.
The foregoing embodiment numbers of the present application are merely for describing, and do not represent advantages or disadvantages of the embodiments.
In the foregoing embodiments of the present application, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application and are intended to be comprehended within the scope of the present application.
Claims (10)
1. A balancing valve, comprising:
a housing (1);
the connecting pipe (2) is arranged in the shell (1), a channel (21) for circulating fluid is formed in the connecting pipe (2), a valve body (22) is arranged at one end of the connecting pipe (2), and the valve body (22) is used for opening or closing the channel (21);
the heat storage cavity (3) is arranged in the shell (1), the heat storage cavity (3) surrounds the connecting pipe (2), the heat storage cavity (3) is arranged corresponding to the valve body (22), and a phase change material and a pressure sensor (31) for detecting the pressure in the heat storage cavity (3) are arranged in the heat storage cavity (3);
the heating component (4) is arranged corresponding to the heat storage cavity (3), and the phase change material in the heat storage cavity (3) is heated by the heating component (4);
the controller is in signal connection with the pressure sensor (31) and the heating component (4), when the pressure sensor (31) detects that the pressure in the heat storage cavity (3) reaches a preset value, a signal is transmitted to the controller, and the controller opens or closes the heating component (4).
2. The balancing valve according to claim 1, characterized in that the heating element (4) is an electric heating wire, the heating element (4) is arranged outside the housing (1), the heating element (4) is arranged around the housing (1), the controller is arranged to switch on or off the heating element (4) by means of a control circuit, and/or the phase change material is paraffin (32).
3. The balancing valve according to claim 1, characterized in that the housing (1) comprises a top cover (11), a side wall (12) and an end cover (13), one end of the side wall (12) is connected with the top cover (11), the other end of the side wall (12) is connected with the end cover (13), the valve body (22) is fixed on the end cover (13), and one end of the connecting pipe (2) away from the valve body (22) is connected with the top cover (11).
4. A balancing valve according to claim 3, characterized in that the balancing valve further comprises a heat insulating plate (5), the connecting pipe (2) being arranged through the heat insulating plate (5), the side wall (12) and the end cap (13) enclosing the heat storage chamber (3).
5. The balancing valve according to claim 4, characterized in that a connecting portion (131) is provided on the end cap (13), the connecting portion (131) being located outside the housing (1), the connecting portion (131) being in abutment with the heating member (4).
6. The balancing valve according to claim 5, characterized in that the balancing valve further comprises a heat conducting rib (7), the heat conducting rib (7) being arranged in the heat storage chamber (3), one end of the heat conducting rib (7) being connected to the valve body (22), the other end of the heat conducting rib (7) being arranged at a distance from the side wall (12) such that a flow gap (10) for the phase change material to flow is arranged between the heat conducting rib (7) and the side wall (12).
7. The balancing valve according to claim 6, characterized in that the number of heat conducting ribs (7) is a plurality, a plurality of heat conducting ribs (7) being arranged around the valve body (22), a plurality of heat conducting ribs (7) being arranged at intervals.
8. A balancing valve according to claim 3, characterized in that the balancing valve further comprises a sealing ring (8), the sealing ring (8) is connected with the top cover (11), a through hole (81) is arranged in the middle of the sealing ring (8), and one end of the connecting pipe (2) is arranged through the through hole (81).
9. A cold storage device comprising a door body (9), characterized in that the door body (9) is provided with a balancing valve according to any one of claims 1-8.
10. A control method suitable for use in a refrigeration unit as claimed in claim 9, said control method comprising: setting a minimum pressure value P1 and a maximum pressure value P2 when the phase change material in the heat storage cavity (3) changes phase, and judging the magnitudes of the real-time pressure value P, the minimum pressure value P1 and the maximum pressure value P2 according to the fact that the pressure sensor (31) detects the real-time pressure value P in the heat storage cavity (3);
if P is less than or equal to P1, the controller starts the heating component (4);
if P is more than or equal to P2, the controller turns off the heating component (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410008579.XA CN117515237B (en) | 2024-01-04 | 2024-01-04 | Balancing valve, refrigerating device and control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410008579.XA CN117515237B (en) | 2024-01-04 | 2024-01-04 | Balancing valve, refrigerating device and control method |
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| Publication Number | Publication Date |
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| CN117515237A CN117515237A (en) | 2024-02-06 |
| CN117515237B true CN117515237B (en) | 2024-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101280991A (en) * | 2007-04-05 | 2008-10-08 | 深圳清华大学研究院 | Device and method for automatically regulating refrigerated container body inside and outside air pressure balance |
| CN104110927A (en) * | 2014-05-23 | 2014-10-22 | 青岛澳柯玛超低温冷冻设备有限公司 | Frosting-proof air pressure balance structure on low-temperature equipment |
| CN105889582A (en) * | 2016-04-18 | 2016-08-24 | 吴楠 | Automatic air pressure balancing valve core and balancing valve |
| CN211903475U (en) * | 2020-03-08 | 2020-11-10 | 宁夏万仕隆冷冻科技股份有限公司 | Multifunctional heat-preservation cold storage door for low-temperature cold storage |
| CN115388592A (en) * | 2021-05-25 | 2022-11-25 | 佛山海尔电冰柜有限公司 | Air pressure balance valve and refrigerator with same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9464729B2 (en) * | 2011-06-14 | 2016-10-11 | Brooks Instrument, Llc | Pressure balanced valve |
-
2024
- 2024-01-04 CN CN202410008579.XA patent/CN117515237B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101280991A (en) * | 2007-04-05 | 2008-10-08 | 深圳清华大学研究院 | Device and method for automatically regulating refrigerated container body inside and outside air pressure balance |
| CN104110927A (en) * | 2014-05-23 | 2014-10-22 | 青岛澳柯玛超低温冷冻设备有限公司 | Frosting-proof air pressure balance structure on low-temperature equipment |
| CN105889582A (en) * | 2016-04-18 | 2016-08-24 | 吴楠 | Automatic air pressure balancing valve core and balancing valve |
| CN211903475U (en) * | 2020-03-08 | 2020-11-10 | 宁夏万仕隆冷冻科技股份有限公司 | Multifunctional heat-preservation cold storage door for low-temperature cold storage |
| CN115388592A (en) * | 2021-05-25 | 2022-11-25 | 佛山海尔电冰柜有限公司 | Air pressure balance valve and refrigerator with same |
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|---|---|
| CN117515237A (en) | 2024-02-06 |
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