CN209818804U - High-pressure four-way change valve - Google Patents
High-pressure four-way change valve Download PDFInfo
- Publication number
- CN209818804U CN209818804U CN201920418587.6U CN201920418587U CN209818804U CN 209818804 U CN209818804 U CN 209818804U CN 201920418587 U CN201920418587 U CN 201920418587U CN 209818804 U CN209818804 U CN 209818804U
- Authority
- CN
- China
- Prior art keywords
- valve
- pressure
- valve core
- main valve
- way
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Multiple-Way Valves (AREA)
Abstract
The utility model relates to a high-pressure four-way reversing valve, which comprises a main valve and a two-position three-way valve, wherein a left cavity and a right cavity are respectively formed in the main valve body at two sides of a main valve core; a first outlet of the two-position three-way valve is communicated with the left chamber through a first communicating pipe, a second outlet of the two-position three-way valve is communicated with the right chamber through a second communicating pipe, and an inlet of the two-position three-way valve is used for being connected with an outlet of the compressor; the main valve body is provided with a first connecting pipe, a low-pressure outlet pipe and a second connecting pipe, the first connecting pipe is used for being connected with the outdoor heat exchanger, the second connecting pipe is used for being connected with the heat pump heat exchanger, and the low-pressure outlet pipe is used for being connected with an inlet of the compressor; a first capillary tube is connected between the first connecting tube and the first communicating tube, and a second capillary tube is connected between the second connecting tube and the second communicating tube. The novel four-way reversing valve can improve the bearing capacity and promote the rapid development of heat pumps and refrigeration industries which use carbon dioxide as a refrigerant.
Description
Technical Field
The utility model relates to a four-way reversing valve technical field, concretely relates to high pressure four-way reversing valve that carbon dioxide heat pump system used.
Background
The air conditioning system needs a matched four-way reversing valve for switching between refrigeration and heating. The technology of a four-way reversing valve for a common air-conditioning system is mature, taking a four-way reversing valve with the model number of SHF-3550 produced by Zhejiang three-flower intelligent control corporation as an example, the specific structure is shown in figure 1: it mainly includes a main valve 7 and electromagnetic pilot valve 8, and the electromagnetic pilot valve is used for the switching-over of main valve, and the main valve includes main valve body, main spool valve, and the electromagnetic pilot valve includes pilot valve body, pilot spool valve, coil, compression spring, specifically:
when the coil 11 of the pilot valve is in a power-off state, the pilot slide valve 9 is driven by the right compression spring 10 to move downwards and leftwards, high-pressure gas discharged from the compressor 1 enters the right piston cavity 3 after entering the capillary tube 2 through the inlet tube D, and meanwhile, gas in the left piston cavity is discharged, because of pressure difference between two ends of the piston, the piston and the main slide valve 4 move leftwards, so that an exhaust pipe (in the state, the exhaust pipe is a pipe C) is communicated with a connecting pipe of the outdoor unit 5, and the other two connecting pipes (a pipe E and a pipe S in the figure) are communicated, so that a refrigeration cycle is formed.
When the coil 11 is in the power-on state, the pilot slide valve 9 overcomes the tension of the compression spring 10 to move right under the action of the magnetic force generated by the coil, high-pressure gas enters the left-end piston cavity after entering the capillary tube 2 through the inlet tube D, meanwhile, the gas in the right-end piston cavity is exhausted, and because the pressure difference exists at the two ends of the piston, the piston and the main slide valve 4 move right, so that the exhaust pipe (in this state, the exhaust pipe is a pipe E) is communicated with the connecting pipe of the indoor unit 6, and the other two connecting pipes (a pipe C and a pipe S) are communicated, thereby forming a.
Regarding the four-way reversing valve with such a structure, reference may also be made to a refrigerant circulation system disclosed in chinese patent application publication No. CN107289151A, and a four-way reversing valve disclosed in application publication No. CN 104344016A.
The four-way reversing valve shown in fig. 1 is generally used due to the advantages of small volume, low price, simple control and the like, but the maximum working pressure of the four-way reversing valve is only 4.2MPa, which has certain relation with the structure, and the main slide valve 4 as a valve core is of an arched sheet structure. With carbon dioxide (CO)2) The highest pressure of a heat pump system used as a refrigerant reaches 7.3MPa in a non-operation state, and the pressure reaches 12MPa or higher in operation, so that the four-way reversing valve can not meet the use requirement obviously.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a high pressure four-way reversing valve to solve the problem that current four-way reversing valve is uncomfortable to be used for the heat pump system that carbon dioxide is the refrigerant.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the high-pressure four-way reversing valve comprises a main valve and a two-position three-way valve for switching the flow direction of high-temperature and high-pressure gas at the outlet of the compressor, wherein the main valve comprises a main valve body and a main valve core, and a left chamber and a right chamber are respectively formed on two sides of the main valve core in the main valve body;
a first outlet of the two-position three-way valve is communicated with the left chamber through a first communicating pipe, a second outlet of the two-position three-way valve is communicated with the right chamber through a second communicating pipe, and an inlet of the two-position three-way valve is used for being connected with an outlet of the compressor;
the main valve body is provided with a first connecting pipe, a low-pressure outlet pipe and a second connecting pipe, the first connecting pipe is used for being connected with the outdoor heat exchanger, the second connecting pipe is used for being connected with the heat pump heat exchanger, and the low-pressure outlet pipe is used for being connected with an inlet of the compressor;
a first capillary tube is connected between the first connecting tube and the first communicating tube, and a second capillary tube is connected between the second connecting tube and the second communicating tube;
the main valve core is positioned at a heating station, the second connecting pipe and the right chamber are communicated with the second communicating pipe, and the first connecting pipe and the low-pressure outlet pipe are communicated;
the main valve core is positioned at a refrigerating station, the first connecting pipe and the left chamber are communicated with the first communicating pipe, and the second connecting pipe and the low-pressure outlet pipe are communicated.
Further, the two-position three-way valve is a two-position three-way ball valve or a two-position three-way stop valve.
Furthermore, the main valve core comprises a first valve core and a second valve core, and the cross section of the main valve core is I-shaped.
Furthermore, the cross section of the first valve core is T-shaped, and the second valve core is fixedly connected to the first valve core through a first screw.
Further, the second valve core includes case body, closure plate, and the case body passes through first fix with screw is on first case, and the closure plate passes through the second fix with screw in the outside of case body, and is equipped with first sealing washer between closure plate and the case body.
Furthermore, a second sealing ring is arranged in the radial direction of the valve core body, and the second sealing ring is assembled with the inner wall of the main valve body in a sliding sealing mode.
Further, a third sealing ring is radially arranged on the large-diameter section of the first valve core, and the third sealing ring is assembled with the inner wall of the main valve body in a sliding and sealing mode.
Furthermore, the part of the main valve body between the left chamber and the right chamber protrudes inwards to form a step hole type sealing matching part, a fourth sealing ring and a fifth sealing ring are respectively arranged on two sides of the sealing matching part, and the main valve core is alternately matched with the fourth sealing ring and the fifth sealing ring in the switching process of the cooling mode and the heating mode.
The utility model has the advantages that: the utility model provides a novel four-way reversing valve, which mainly comprises a main valve and a two-position three-way valve, wherein the two-position three-way valve realizes the flow direction switching of high-temperature and high-pressure gas at the outlet of a compressor; the main valve is used as a reversing valve to realize the final switching of the refrigeration and heating modes. The utility model discloses a four-way reversing valve simple structure, the manufacturing of being convenient for, operation control is also simple, has fine application prospect. In addition, the four-way reversing valve has the advantages that the left end part and the right end part of the valve core are used for bearing high pressure no matter in the working process of heating and refrigerating modes or in the process of switching the working modes, and compared with the sheet-shaped valve core in the prior art, the four-way reversing valve has strong pressure bearing capacity. The novel four-way reversing valve can promote the rapid development of heat pump and refrigeration industries which use high-efficiency and environment-friendly carbon dioxide as a refrigerant, and the structure and the principle of the novel four-way reversing valve can also be applied to other industries with related technical requirements.
Drawings
FIG. 1 is a schematic diagram of a four-way reversing valve according to the prior art;
FIG. 2 is a schematic structural view of the high-pressure four-way reversing valve of the present invention;
FIG. 3 is a schematic illustration of the main spool of FIG. 2;
FIG. 4 is a schematic view of the high pressure four-way reversing valve of the present invention in a heating mode when in use;
FIG. 5 is a schematic diagram I of the left-moving process of the main valve core of the high-pressure four-way reversing valve during mode switching;
FIG. 6 is a schematic diagram of the left-moving process of the main valve element of the high-pressure four-way reversing valve during mode switching;
FIG. 7 is a schematic diagram of the left-hand process of the main valve element of the high-pressure four-way reversing valve during mode switching;
FIG. 8 is a schematic diagram of the left-hand process of the main valve element of the high-pressure four-way reversing valve during mode switching;
fig. 9 is a schematic view of the high-pressure four-way reversing valve of the present invention in a cooling mode when in use.
The names corresponding to the respective marks in fig. 2 to 9: 1. the main valve body, 11, a valve housing, 111, a fifth seal ring, 112, a fourth seal ring, 12, a plug, 2, a main valve core, 21, a first valve core, 211, a third seal ring, 22, a second valve core, 221, a valve core body, 222, a blocking plate, 23, a first screw, 24, a second seal ring, 25, a first seal ring, 26, a second screw, 3, a first connecting pipe, 4, a low-pressure outlet pipe, 5, a second connecting pipe, 6, a two-position three-way valve, 61, a two-position three-way valve body, 62, a two-position three-way valve core, 7, a first connecting pipe, 8, a second connecting pipe, 9, a high-pressure inlet pipe, 10, a first capillary pipe, 20, a second capillary pipe, 30, a compressor, 40, a heat pump heat exchanger, 50 and an.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.
Embodiment 1 of the utility model:
as shown in fig. 2 to 9, the high-pressure four-way reversing valve includes a main valve and a two-position three-way valve 6 for switching the flow direction of the high-temperature and high-pressure gas at the outlet of the compressor. The main valve comprises a main valve body 1 and a main valve core 2, a left chamber and a right chamber are respectively formed on two sides of the main valve core 2 in the main valve body 1, and the main valve core moves leftwards or rightwards by switching the airflow direction through a two-position three-way valve. The main valve is also the reversing valve, and the final switching of the refrigeration mode and the heating mode is realized.
The two-position three-way valve 6 adopts a two-position three-way ball valve, and the working principle of the two-position three-way ball valve belongs to the prior art. The two-position three-way valve comprises a two-position three-way valve body 61 and a two-position three-way valve core 62. The two-inlet-two-outlet type compressor adopts the structure that a first outlet of a two-position three-way valve is communicated with a left chamber through a first communicating pipe 7, a second outlet of the two-position three-way valve is communicated with a right chamber through a second communicating pipe 8, and an inlet of the two-position three-way valve is connected with an outlet of the compressor. The inlet of the two-position three-way valve is connected with a high-pressure inlet pipe 9 to realize the communication with the outlet of the compressor.
The main valve body 1 is provided with a first connecting pipe 3, a low-pressure outlet pipe 4 and a second connecting pipe 5, the first connecting pipe 2 is used for being connected with an outdoor heat exchanger 50, the second connecting pipe 5 is used for being connected with a heat pump heat exchanger 40, and the low-pressure outlet pipe 4 is used for being connected with an inlet of a compressor 30. The first connecting pipe 3, the low pressure outlet pipe 4 and the second connecting pipe 5 are arranged side by side, and the low pressure outlet pipe 4 is located at a position between the first connecting pipe 3 and the second connecting pipe 5.
A first capillary tube 10 is connected between the first connection tube 3 and the first connection tube 7, and a second capillary tube 20 is connected between the second connection tube 5 and the second connection tube 8.
The main valve core 2 is positioned at a heating station, the second connecting pipe 5 and the right chamber are communicated with the second communicating pipe 8, and the first connecting pipe 3 and the low-pressure outlet pipe 4 are communicated; main valve core 2 is in the refrigeration station, and first connecting pipe 3, left side cavity are linked together with first connecting pipe 7, and second connecting pipe 5, low pressure outlet pipe 4 are linked together.
The main valve body 1 comprises a valve housing 11 and plugs 12 arranged at the left end and the right end of the valve housing, and one end of each of the first communicating pipe 7 and the second communicating pipe 8 is connected to the corresponding plug.
Main spool 2 includes first spool 21, second spool 22, and main spool 2 is i-shaped in cross-section. The first valve body 21 has a T-shaped cross section, and the second valve body 22 is fixedly connected to the first valve body 21 by a first screw 23.
Specifically, the second valve core 22 includes a valve core body 221 and a blocking plate 222, the valve core body 221 is fixed on the first valve core by a first screw 23, the blocking plate 222 is fixed on the outer side of the valve core body 221 by a second screw 26, and a first sealing ring 25 is arranged between the blocking plate 222 and the valve core body 221. The first screw 23 is positioned in the ring of the first sealing ring 25, and the first sealing ring 25 realizes sealing under the pressure action of the second screw, so that air leakage at the first screw is prevented.
The valve core body 221 is radially provided with a second sealing ring 24, and the second sealing ring 24 is assembled with the inner wall of the main valve body in a sliding sealing manner to realize axial sealing.
A third sealing ring 211 is radially arranged on the large-diameter section of the first valve core 21, namely the third sealing ring is annularly arranged on the left end part of the first valve core 21, and the third sealing ring 211 is assembled with the inner wall of the main valve body 1 in a sliding and sealing manner.
The part of the main valve body between the left chamber and the right chamber is raised inwards to form a step hole type sealing matching part. The left side and the right side of the sealing matching part are respectively provided with a fourth sealing ring 112 and a fifth sealing ring 111, and the main valve core is alternatively matched with the fourth sealing ring and the fifth sealing ring in the switching process of the cooling mode and the heating mode.
The structure of the four-way reversing valve of the present invention is described above, and the working principle of the four-way reversing valve in application is described below.
As shown in fig. 4, when the heat pump is in the heating mode, after the heat pump receives a heating mode operation command, the stepping motor controls the valve core of the two-position three-way valve to rotate to the position shown in fig. 4, and the high-temperature and high-pressure refrigerant enters the main valve according to the flow direction shown by the solid arrow in the figure, and pushes the main valve core 2 to move left to the position shown in the figure, so that the outlet of the compressor 30 is communicated with the heat pump heat exchanger 40, and the outdoor heat exchanger 50 is communicated with the inlet of the compressor.
The left-hand displacement of main spool 2 is explained as follows (assuming that the main spool is in the right-most position at this time):
the high temperature and high pressure refrigerant enters the main valve as shown in FIG. 5, and the pressure conditions in the main valve body A, B, C are PA＞PB＞PCThe gap between the main valve element and the main valve body in the radial direction is sealed by the third sealing ring 211 and the fourth sealing ring 112, so that the refrigerant at the high pressure side is prevented from leaking to the low pressure side, the partial refrigerant in the second communication pipe 8 enters the second connecting pipe through the second capillary tube 20, the pressure rise at the position A cannot be influenced due to the capillary tube, the main valve element moves leftwards under the action of pressure difference, and the refrigerant in the system flows to the direction as shown by an arrow.
When the main valve element is moved to the left to the position shown in fig. 6, the main passages of the first connecting pipe 7 and the first connecting pipe 3 are closed by the main valve element 2, the main passages of the low-pressure outlet pipe 4 and the second connecting pipe 5 are also closed by the main valve element 2, and the pressure conditions P are three points A, B, C in the main valve bodyA＞PB＞PCThe main valve core will continue to move leftwards under the action of the pressure difference, and part of the refrigerant in the second communicating pipe 8 enters the second connecting pipe 5 through the second capillary 20, and the flow direction of the refrigerant in the system is shown as an arrow.
When the main spool moves to the left to the position shown in FIG. 7At this time, the main passages of the second communicating pipe 8 and the second connecting pipe 5 are opened, the main passages of the first connecting pipe 3 and the low-pressure outlet pipe 4 are also opened at the same time, and the pressure conditions P are three places A, B, C in the main valve bodyA＞PB＞PCThe main spool will continue to move to the left under the influence of the pressure differential. The space at B is continuously reduced, and the refrigerant in the first communication pipe 7 enters the first connection pipe 3 through the first capillary tube 10, and the flow direction of the refrigerant in the system is shown by an arrow.
When the main valve spool moves left to the position shown in FIG. 8, the pressure conditions at three locations in the main valve body interior A, B, C are PA＞PB＝PCThe main spool presses the fifth packing 111 under the pressure generated by the high pressure difference, so that the high pressure side refrigerant does not flow to the low pressure side. The main passages of the second communication pipe 8, the second connection pipe 5, the first connection pipe 3, and the low pressure outlet pipe 4 are all completely opened, and the system starts to operate in a heating mode.
When the heat pump receives a refrigerating mode operation command, the stepping motor controls the valve core of the two-position three-way valve to rotate to the position shown in figure 9, high-temperature and high-pressure refrigerant enters the main valve according to the flow direction shown by a solid arrow in the figure, the main valve core is pushed to move right to the position shown in the figure, the outlet of the compressor is communicated with the outdoor heat exchanger, and meanwhile, the heat pump heat exchanger is communicated with the inlet of the compressor to form a refrigerating cycle. Regarding the process of the main valve core moving to the right, the moving direction is opposite to the above-mentioned process of the main valve core moving to the left, but the principle is the same and will not be described in detail.
The utility model discloses a four-way reversing valve designs the maximum working pressure and is 14MPa, can satisfy the operation requirement that uses carbon dioxide to make the heat pump system of refrigerant.
For reaching the purpose of convenient and high pressure resistant welding, the utility model discloses a four-way reversing valve's all external connecting pipes all are copper pipe or nonrust steel pipe for the refrigeration air conditioner, and the valve body material is 304 stainless steel or carbon steel, and carbon steel and stainless steel and the effective brazing welding of copper pipe. And argon arc welding is used for connecting stainless steel and carbon steel. All parts of the main valve core are made of 304 stainless steel or carbon steel.
In order to ensure the sealing effect, the first to fifth sealing rings are made of high-temperature-resistant fluororubber or silicon rubber O-shaped rings. In the process aspect, external brazing is firstly carried out, and then internal machining and component assembly are carried out, so that thermal deformation and damage to a sealing piece are prevented. And polishing the part of the main valve core, which is contacted with the sealing ring.
The fourth sealing ring and the fifth sealing ring can play a role in sealing and damping, specifically, when the main valve element moves leftwards, the fifth sealing ring can play a role in damping, and when the main valve element moves rightwards, the fourth sealing ring can play a role in damping.
In this embodiment, the left end portion of the first valve element and the second valve element are preferably cylindrical, and the valve housing of the main valve body is cylindrical. Of course, in other embodiments, other possible configurations may be provided, such as the main valve body is designed to be a square cylinder, or the left end of the first valve core is provided with a certain taper.
Embodiment 2 of the utility model:
in this embodiment, the two-position three-way stop valve is adopted to replace the two-position three-way ball valve in embodiment 1, and the rest of the structure is unchanged. Of course, in other embodiments, other valves may be used, such as a two-position, three-way solenoid valve.
Embodiment 3 of the utility model:
this embodiment is different from embodiment 1 in that the mounting position of the main spool is reversed, that is, the second spool provided with the blocking plate, the first seal ring, and the like is located on the side of the left chamber.
In other embodiments, a seal-fitting portion as in embodiment 1 may not be provided at an intermediate position in the main valve body.
Claims (8)
1. The high-pressure four-way reversing valve is characterized in that: the high-temperature high-pressure gas compressor comprises a main valve and a two-position three-way valve, wherein the two-position three-way valve is used for switching the flow direction of high-temperature high-pressure gas at an outlet of the compressor, the main valve comprises a main valve body and a main valve core, and a left chamber and a right chamber are respectively formed in the main valve body on two sides of the main valve core;
a first outlet of the two-position three-way valve is communicated with the left chamber through a first communicating pipe, a second outlet of the two-position three-way valve is communicated with the right chamber through a second communicating pipe, and an inlet of the two-position three-way valve is used for being connected with an outlet of the compressor;
the main valve body is provided with a first connecting pipe, a low-pressure outlet pipe and a second connecting pipe, the first connecting pipe is used for being connected with the outdoor heat exchanger, the second connecting pipe is used for being connected with the heat pump heat exchanger, and the low-pressure outlet pipe is used for being connected with an inlet of the compressor;
a first capillary tube is connected between the first connecting tube and the first communicating tube, and a second capillary tube is connected between the second connecting tube and the second communicating tube;
the main valve core is positioned at a heating station, the second connecting pipe and the right chamber are communicated with the second communicating pipe, and the first connecting pipe and the low-pressure outlet pipe are communicated;
the main valve core is positioned at a refrigerating station, the first connecting pipe and the left chamber are communicated with the first communicating pipe, and the second connecting pipe and the low-pressure outlet pipe are communicated.
2. The high-pressure four-way reversing valve of claim 1, wherein: the two-position three-way valve is a two-position three-way ball valve or a two-position three-way stop valve.
3. The high-pressure four-way reversing valve of claim 1, wherein: the main valve core comprises a first valve core and a second valve core, and the section of the main valve core is I-shaped.
4. The high-pressure four-way reversing valve of claim 3, wherein: the section of the first valve core is T-shaped, and the second valve core is fixedly connected to the first valve core through a first screw.
5. The high-pressure four-way reversing valve of claim 4, wherein: the second valve core comprises a valve core body and a blocking plate, the valve core body is fixed on the first valve core through a first screw, the blocking plate is fixed on the outer side of the valve core body through a second screw, and a first sealing ring is arranged between the blocking plate and the valve core body.
6. The high-pressure four-way reversing valve of claim 5, wherein: and a second sealing ring is arranged in the radial direction of the valve core body and is assembled with the inner wall of the main valve body in a sliding and sealing manner.
7. The high-pressure four-way reversing valve of claim 4, wherein: and a third sealing ring is radially arranged on the large-diameter section of the first valve core, and the third sealing ring is assembled with the inner wall of the main valve body in a sliding and sealing manner.
8. The high-pressure four-way reversing valve according to any one of claims 3 to 7, wherein: the part of the main valve body between the left chamber and the right chamber protrudes inwards to form a step hole type sealing matching part, a fourth sealing ring and a fifth sealing ring are respectively arranged on two sides of the sealing matching part, and the main valve core is alternately matched with the fourth sealing ring and the fifth sealing ring in the process of switching the refrigerating mode and the heating mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920418587.6U CN209818804U (en) | 2019-03-29 | 2019-03-29 | High-pressure four-way change valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920418587.6U CN209818804U (en) | 2019-03-29 | 2019-03-29 | High-pressure four-way change valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209818804U true CN209818804U (en) | 2019-12-20 |
Family
ID=68877845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920418587.6U Expired - Fee Related CN209818804U (en) | 2019-03-29 | 2019-03-29 | High-pressure four-way change valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209818804U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113224419A (en) * | 2021-04-25 | 2021-08-06 | 长安大学 | Reciprocating flow cooling system of constant-current lithium ion power battery and control method |
| CN113224420A (en) * | 2021-04-25 | 2021-08-06 | 长安大学 | Reciprocating flow cooling system of normal-pressure lithium ion power battery and control method |
| WO2024156282A1 (en) * | 2023-01-28 | 2024-08-02 | 中国核电工程有限公司 | Valve set for safety of nuclear power plant, pressure relief valve set, discharge valve set, and isolation valve |
-
2019
- 2019-03-29 CN CN201920418587.6U patent/CN209818804U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113224419A (en) * | 2021-04-25 | 2021-08-06 | 长安大学 | Reciprocating flow cooling system of constant-current lithium ion power battery and control method |
| CN113224420A (en) * | 2021-04-25 | 2021-08-06 | 长安大学 | Reciprocating flow cooling system of normal-pressure lithium ion power battery and control method |
| CN113224420B (en) * | 2021-04-25 | 2023-02-10 | 长安大学 | Reciprocating flow cooling system of normal-pressure lithium ion power battery and control method |
| WO2024156282A1 (en) * | 2023-01-28 | 2024-08-02 | 中国核电工程有限公司 | Valve set for safety of nuclear power plant, pressure relief valve set, discharge valve set, and isolation valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209818804U (en) | High-pressure four-way change valve | |
| US10619897B2 (en) | Reversing valve and cooling system having same | |
| US10006671B2 (en) | Air conditioning system and method for controlling same | |
| WO2020192128A1 (en) | Four-way reversing valve | |
| CN102252114A (en) | Flow path switching valve | |
| JP6261008B2 (en) | Sliding switching valve and refrigeration cycle system | |
| JP2017075675A (en) | Slide type selector valve and refrigeration cycle system | |
| CN100580340C (en) | Heat pump type air conditioner | |
| KR101088043B1 (en) | Four-way type reversing valve | |
| CN106838374A (en) | Reversal valve and the refrigeration system with the reversal valve | |
| CN114704670B (en) | Electromagnetic reversing valve and main valve thereof | |
| CN209818802U (en) | Four-way reversing valve | |
| CN108374910B (en) | Four-way valve and air conditioner | |
| CN101706185B (en) | Self-operated three-way reversing valve | |
| CN215059704U (en) | Reversing valve and air conditioning system with same | |
| CN207049004U (en) | Check valve and scroll compressor with same | |
| CN212692010U (en) | Reversing valve and double-evaporation-temperature air conditioning system | |
| CN2442055Y (en) | Four-way electromagnetic change valve for direct current frequency conversion air conditioner | |
| CN220541429U (en) | Thermotechnical system for replacing four-way valve | |
| CN220793475U (en) | Air conditioner of heat pump water heater | |
| JP3957941B2 (en) | Pressure sensitive switching valve | |
| CN212360355U (en) | Sectional type reversing valve body and reversing valve with same | |
| CN216347151U (en) | Dual-mode refrigeration system | |
| CN111121335B (en) | Air conditioning system | |
| CN217784279U (en) | Six-way valve and air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191220 Termination date: 20210329 |