Four-way valve and heat pump unit

Abstract

The application provides a four-way valve and a heat pump unit. The four-way valve comprises a valve body, a valve core seat and valve cores. The valve body is provided with a valve cavity and four communication pipes respectively communicating with the valve cavity. The valve core seat is slidably arranged in the valve cavity. The valve core seat comprises two sealing parts and a valve seat cavity arranged between the two sealing parts. The peripheral side of the sealing part is tightly attached to the inner wall of the valve cavity. The sealing part communicates with the communication pipe. The valve seat cavity always communicates with one of the four communication pipes. The valve cores are arranged in the sealing parts one by one. The valve cores are used for controlling the opening and closing between the valve seat cavity and the sealing part. In this way, the four-way valve has simple structure, low manufacturing cost and convenient maintenance.

Description

Technical Field

[0001] This application relates to the field of air conditioning, and more particularly to a four-way valve and a heat pump unit. Background Technology

[0002] With the rapid development of industrial technology, heat pump units are being used more and more widely. When a heat pump unit switches between cooling and heating modes, the flow direction of the refrigerant changes. The four-way valve, as an indispensable reversing mechanism in the heat pump unit, can switch the refrigerant flow direction. Currently, heat pump units typically use electromagnetic four-way valves. However, electromagnetic four-way valves have many parts, require high manufacturing precision, and are difficult to replace after damage, increasing the manufacturing and maintenance costs of the heat pump unit.

[0003] Therefore, it is necessary to provide an improved four-way valve to solve some or all of the above problems. Utility Model Content

[0004] This application provides a simple four-way valve and a heat pump unit.

[0005] This application provides a four-way valve, comprising: The valve body is provided with a valve cavity and four through pipes respectively communicating with the valve cavity; A valve core seat is slidably disposed within the valve cavity. The valve core seat includes two sealing parts and a valve seat cavity disposed between the two sealing parts. The periphery of the sealing parts is sealed against the inner wall of the valve cavity. The valve seat cavity is always connected to one of the four through pipes. The valve core is provided in two parts, which are respectively disposed in the sealing part. The valve core is used to control the opening and closing between the valve seat cavity and the sealing part.

[0006] Furthermore, the sealing part includes a perforated plate spaced apart and a connecting end, the perforated plate communicating with the valve seat cavity, and the valve core slidably connected to the connecting end; when the valve core is in the closed state, the valve core blocks the perforated plate.

[0007] Furthermore, the valve core includes a core plate and a slide rod, one end of the slide rod is fixed to the core plate, and the slide rod slides through the connecting end, and the core plate is used to block the orifice plate.

[0008] Furthermore, the valve core also includes an elastic element, one end of which is connected to the core plate to provide elastic force to the valve core.

[0009] Furthermore, the elastic element is sleeved on the slide rod, with one end of the elastic element abutting against the core plate and the other end abutting against the connecting end; when the valve core is in the open state, the elastic element is compressed; Alternatively, one end of the elastic element is connected to the core plate, and the other end is connected to the orifice plate; when the valve core is in the open state, the elastic element is stretched.

[0010] Furthermore, the orifice plate is provided with a through hole, and the diameter of the through hole gradually decreases along the direction from the connecting end to the orifice plate; the outer peripheral side of the core plate is adapted to the inner peripheral side of the through hole; when the valve core is in the closed state, at least part of the core plate is located in the through hole.

[0011] Furthermore, the valve body includes a valve body portion, the valve cavity is located in the valve body portion, and the through pipe includes through pipe one, through pipe two, through pipe three, and through pipe four. Through pipe one and through pipe two are respectively located on the periphery of the valve body portion, and through pipe one is always in communication with the valve seat cavity. Through pipe three and through pipe four are respectively located at opposite ends of the valve body portion, and the inner diameter of the valve body portion is larger than the inner diameter of through pipe three and through pipe four.

[0012] Furthermore, the second connecting pipe includes a first port, a second port, and a third port that are connected together. The first port and the second port are spaced apart and are respectively connected to the valve cavity. The first port is located adjacent to the third connecting pipe, and the second port is located adjacent to the fourth connecting pipe.

[0013] Furthermore, the blocking part includes a first blocking part and a second blocking part, the first blocking part being located between the valve seat cavity and the third through pipe, and the first blocking part being located between the valve seat cavity and the fourth through pipe; the valve core includes a first valve core and a second valve core, the first valve core being disposed in the first blocking part, and the second valve core being disposed in the second blocking part; When the first sealing part moves to the third through pipe, the first sealing part seals the first port and is connected to the third through pipe. The first valve core is in the open state, the second valve core is in the closed state, and the fourth through pipe is connected to the second port. When the second sealing part moves to the fourth through pipe, the second sealing part seals the second port and is connected to the fourth through pipe. The second valve core is in the open state, the first valve core is in the closed state, and the third through pipe is connected to the first port.

[0014] This application also provides a four-way valve, comprising: A coil, the coil including a coolant flow channel and a water flow channel, the coolant flow channel covering the water flow channel; Heat exchanger; A compressor, which is connected to the heat exchanger; The four-way valve described above includes a connecting pipe, which includes a first connecting pipe, a second connecting pipe, a third connecting pipe, and a fourth connecting pipe. The first connecting pipe is connected to the outlet of the coolant channel, the second connecting pipe is connected to the inlet of the coolant channel, the third connecting pipe is connected to the compressor, and the fourth connecting pipe is connected to the heat exchanger.

[0015] Compared with the prior art, the four-way valve of this application achieves the flow of the medium in the four-way valve by the valve core seat sliding in the valve cavity and by controlling the opening and closing between the valve seat cavity and the sealing part by the valve core. This makes the four-way valve of this application simple in structure, low in manufacturing cost, and convenient in later maintenance.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this specification. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this specification and, together with the description, serve to explain the principles of this specification.

[0018] Figure 1 This is a perspective view of the four-way valve of this application.

[0019] Figure 2 yes Figure 1 A cross-sectional view of the four-way valve after it has been cut along AA and the valve core seat has been moved to the three-way pipe.

[0020] Figure 3 This is an enlarged view of the four-way valve in this application when the valve core seat moves to the three-way pipe.

[0021] Figure 4 yes Figure 1 A cross-sectional view of the four-way valve after it has been cut along section AA and the valve core seat has been moved to the four-way pipe.

[0022] Figure 5 This is an enlarged view of the four-way valve in this application when the valve core seat is moved to the four-way pipe.

[0023] Figure 6 This is a schematic diagram of the heat pump unit of this application.

[0024] Figure 7 yes Figure 6 A schematic diagram showing the connection between the four-way valve and the coil in a heat pump unit.

[0025] Figure 8 yes Figure 7 Cross-sectional view of the central coil.

[0026] Reference numerals: 1-Valve body; 11-Valve cavity; 12-Pass pipe; 121-Pass pipe one; 122-Pass pipe two; 1221-First port; 1222-Second port; 1223-Third port; 123-Pass pipe three; 124-Pass pipe four; 13-Valve body; 2-Valve core seat; 20-Intermediate connection; 21-Blocking part; 211-Orifice plate; 2110-Through hole; 212-Connecting end; 2121-Protrusion; 213-First blocking part; 214-Second blocking part; 22-Valve seat cavity; 3-Valve core; 31-Core plate; 32-Slide rod; 33-Elastic element; 34-First valve core; 35-Second valve core; 4-Coil; 41-Coolant flow channel; 42-Water flow channel; 5-Heat exchanger; 6-Compressor. Detailed Implementation

[0027] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0028] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0029] like Figure 1 and Figure 2As shown, the four-way valve of this application includes a valve body 1, a valve core seat 2, and a valve core 3. The valve core seat 2 is located inside the valve body 1, and the valve core 3 is connected to the valve core seat 2. Specifically, the valve body 1 has a valve cavity 11 and four through pipes 12 respectively communicating with the valve cavity 11. The valve core seat 2 is slidably disposed in the valve cavity 11 and is used to control the opening and closing of the four through pipes 12. The valve core seat 2 includes two sealing parts 21 and a valve seat cavity 22 disposed between the two sealing parts 21. The valve seat cavity 22 can communicate with the internal cavity of the sealing parts 21. The periphery of the sealing part 21 is sealed and fitted against the inner wall of the valve cavity 11. The sealing part 21 is connected to the through pipe 12, and the valve seat cavity 22 is always connected to one of the four through pipes 12, and this through pipe 12 is always the inflow pipe of the medium. Two valve cores 3 are provided, each corresponding to one of the two sealing parts 21. The valve cores 3 are used to control the opening and closing between the valve seat cavity 22 and the sealing part 21. The four-way valve of this application achieves the flow of the medium in the four-way valve by the valve core seat 2 sliding in the valve cavity 11 and controlling the opening and closing between the valve seat cavity 22 and the sealing part 21 by the valve core 3. Through the above design, the four-way valve of this application has a simple structure, low manufacturing cost, and convenient maintenance.

[0030] In some embodiments, the valve body 1 may further include a valve body portion 13, with a valve cavity 11 disposed within the valve body portion 13. The through pipe 12 includes a first through pipe 121, a second through pipe 122, a third through pipe 123, and a fourth through pipe 124. The first through pipe 121 and the second through pipe 122 are respectively disposed on the periphery of the valve body portion 13, and the first through pipe 121 is always in communication with the valve seat cavity 22. Specifically, the valve body portion 13 is preferably, but not limited to, cylindrical, and the first through pipe 121 and the second through pipe 122 are respectively disposed on the outer circumference of the valve body portion 13 and are arranged opposite to each other.

[0031] Pipe 121 is a straight pipe, and pipe 22 is Y-shaped, meaning pipe 222 includes a first port 1221, a second port 1222, and a third port 1223 that are connected to each other. The first port 1221 and the second port 1222 are spaced apart and connected to the outer circumference of the valve body 13, and are also connected to the valve cavity 11. The first port 1221 is located adjacent to pipe 323, and the second port 1222 is located adjacent to pipe 424.

[0032] Both the third and fourth connecting pipes 123 and 124 are straight pipes and are located at opposite ends of the valve body 13. The inner diameter of the valve body 13 is larger than the inner diameters of the third and fourth connecting pipes 123 and 124. It should be noted that the inner diameter of the valve body 13 is the radial dimension of the valve cavity 11. In other words, the connection between the valve body 13 and the third and fourth connecting pipes 123 and 124 is stepped. This design confines the valve core seat 2 within the valve body 13, meaning that the valve core seat 2 can only slide back and forth within the valve cavity 11.

[0033] In some embodiments, to adapt to the valve cavity 11, the sealing portion 21 of the valve core seat 2 is cylindrical, so as to fit tightly against the inner wall of the valve body 13. The valve core seat 2 may also include a central connection portion 20, wherein the valve seat cavity 22 is disposed in the central connection portion 20, and the central connection portion 20 is connected between the two sealing portions 21. The central connection portion 20 is semi-cylindrical, and the opening of the central connection portion 20 always faces the first through pipe 121, so that the first through pipe 121 is always in communication with the valve seat cavity 22. When the valve core seat 2 moves to the third through pipe 123, the third through pipe 123 and the first through pipe 121 are connected, and the valve core seat 2 seals the first port 1221, while the fourth through pipe 124 and the second port 1222 are connected. When the valve core seat 2 moves to the fourth pipe 124, the fourth pipe 124 is connected to the first pipe 121, and the valve core seat 2 blocks the second port 1222, the third pipe 123 is connected to the first port 1221.

[0034] The following combination Figures 3 to 5 The valve core seat 2 will be described in detail below. The two sealing parts 21 are approximately mirror images of each other. The following explanation uses one sealing part 21 as an example. Figures 3 to 5 As shown, the sealing part 21 includes a spaced-apart orifice plate 211 and a connecting end 212. The orifice plate 211 is located between the valve seat cavity 22 and the cavity of the sealing part 21, and the orifice plate 211 communicates with the valve seat cavity 22. The valve core 3 is slidably connected to the connecting end 212, which is also the end of the valve core seat 2. When the valve core 3 is in the closed state, the valve core 3 seals the orifice plate 211.

[0035] The blocking part 21 may further include a first blocking part 213 and a second blocking part 214. The intermediate connection part 20 is connected between the first blocking part 213 and the second blocking part 214. The first blocking part 213 is located between the valve seat cavity 22 and the connecting pipe 123, and between the valve seat cavity 22 and the connecting pipe 124. When the first blocking part 213 moves to the connecting pipe 123, it blocks the first port 1221 and communicates with both the connecting pipe 123 and the valve seat cavity 22. The second blocking part 214 is spaced apart from the connecting pipe 124 and blocks the communication between the valve seat cavity 22 and the connecting pipe 124, so that the connecting pipe 124 only communicates with the second port 1222. To improve the flow of the medium, the second blocking part 214 avoids the second port 1222 and the port of the connecting pipe 121.

[0036] When the second sealing part 214 moves to the fourth connecting pipe 124, the second sealing part 214 blocks the second port 1222 and communicates with both the fourth connecting pipe 124 and the valve seat cavity 22. Meanwhile, the first sealing part 213 is spaced apart from the third connecting pipe 123 and blocks the communication between the valve seat cavity 22 and the third connecting pipe 123, ensuring that the third connecting pipe 123 is only connected to the first port 1221. To improve the flow of the medium, the first sealing part 213 avoids the first port 1221 and the port of the first connecting pipe 121.

[0037] In some embodiments, the valve core 3 is used to control the opening and closing between the cavity of the blocking part 21 and the valve seat cavity 22, and two valve cores 3 are provided, which are connected one-to-one to the first blocking part 213 and the second blocking part 214. The two valve cores 3 have approximately the same structure, and the following description uses one valve core 3 as an example. Specifically, the valve core 3 includes a core plate 31 and a slide rod 32. One end of the slide rod 32 is fixed to the core plate 31, and the slide rod 32 slides through the connecting end 212. The core plate 31 is used to block the orifice plate 211. That is, the core plate 31 can fit against the orifice plate 211 to block the communication between the cavity of the blocking part 21 and the valve seat cavity 22.

[0038] To better block the communication between the sealing part 21 cavity and the valve seat cavity 22, the orifice plate 211 is provided with a through hole 2110. The diameter of the through hole 2110 gradually decreases along the direction from the connecting end 212 to the orifice plate 211, and the outer peripheral side of the core plate 31 is adapted to the inner peripheral side of the through hole 2110. When the valve core 3 is in the closed state, at least part of the core plate 31 is located in the through hole 2110.

[0039] In some other embodiments, the cross-section of the core plate 31 is larger than the cross-section of the through hole 2110. When the valve core 3 is in the closed state, the core plate 31 is attached to the orifice plate 211 and covers the through hole 2110.

[0040] like Figure 5 As shown, in some embodiments, the valve core 3 may further include an elastic element 33, with one end of the elastic element 33 connected to the core plate 31 to provide elastic force to the valve core 3, thereby improving the convenience of switching the valve core 3 between the closed and open states. Specifically, the elastic element 33 is sleeved on the slide rod 32, with one end of the elastic element 33 abutting against the core plate 31 and the other end abutting against the connecting end 212. When the valve core 3 is in the open state, the elastic element 33 is compressed. To prevent the elastic element 33 from sliding, the elastic element 33 is always in a compressed state, thereby fixing the elastic element 33 between the connecting end 212 and the core plate 31. To improve the stability of the elastic element 33 when fixed, the connecting end 212 is provided with a protrusion 2121 protruding towards the core plate 31, and one end of the elastic element 33 is sleeved on the protrusion 2121.

[0041] In some other embodiments, multiple elastic elements 33 are provided, each arranged around the slide bar 32. Furthermore, both ends of each elastic element 33 abut against the connecting end 212 and the core plate 31, respectively.

[0042] In some other embodiments, one end of the elastic element 33 is connected to the core plate 31, and the other end is connected to the orifice plate 211. When the valve core 3 is in the open state, the elastic element 33 is stretched.

[0043] In some embodiments, the valve core 3 may further include a first valve core 34 and a second valve core 35, wherein the first valve core 34 is disposed in the first blocking portion 213 and the second valve core 35 is disposed in the second blocking portion 214. When the first blocking portion 213 moves to the through pipe 123, the first valve core 34 is in the open state and the second valve core 35 is in the closed state. When the second blocking portion 214 moves to the through pipe 124, the second valve core 35 is in the open state and the first valve core 34 is in the closed state.

[0044] In the four-way valve of this application, the valve core seat 2 slides by the thrust of the medium flowing. For example, pipe 121 is the medium inlet pipe, pipe 22 is the medium outlet pipe, and pipes 323 and 424 can be either medium inlet or outlet pipes. When pipe 323 is the medium inlet pipe and pipe 424 is the medium outlet pipe, the medium in pipe 323 pushes the valve core seat 2 to slide until it abuts against pipe 424, so that pipe 323 is connected to pipe 222; and the first valve core 34 is in a closed state under the pushing action of the medium in pipe 323, while the medium in pipe 121 pushes the second valve core 35, so that the second valve core 35 is in an open state, thereby realizing the connection between pipe 121 and pipe 424. It should be noted that during this process, the thrust generated by the medium in the third pipe 123 is greater than the thrust generated by the medium in the first pipe 121, so as to prevent the medium in the first pipe 121 from flowing back into the third pipe 123 through the first valve core 34.

[0045] When pipe 124 is the inlet pipe and pipe 123 is the outlet pipe, the medium in pipe 124 pushes the valve core seat 2 to slide until it abuts against pipe 123, thus connecting pipe 124 with pipe 122. The second valve core 35 is closed under the pushing action of the medium in pipe 124, while the medium in pipe 121 pushes the first valve core 34, opening it and connecting pipe 121 with pipe 123. It should be noted that during this process, the thrust generated by the medium in pipe 124 is greater than the thrust generated by the medium in pipe 121, thus preventing the medium in pipe 121 from flowing back into pipe 124 through the second valve core 35.

[0046] like Figures 6 to 8 As shown, this application also provides a heat pump unit, including a coil 4, a heat exchanger 5, a compressor 6, and a four-way valve as described above. The coil 4 includes a coolant flow channel 41 and a water flow channel 42, wherein the coolant flow channel 41 covers the water flow channel 42. Specifically, the water flow channel 42 is located inside the coolant flow channel 41, and the inner diameter of the water flow channel 42 is larger than the outer diameter of the coolant flow channel 41. The compressor 6 is connected to the heat exchanger 5, the first connecting pipe 121 is connected to the outlet of the coolant flow channel 41, the second connecting pipe 122 is connected to the inlet of the coolant flow channel 41, the third connecting pipe 123 is connected to the compressor 6, and the fourth connecting pipe 124 is connected to the heat exchanger 5. By setting the above-mentioned four-way valve, the heat pump unit of this application can realize the reversal of the coolant, thereby realizing the switching between cooling mode and heating mode.

[0047] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A four-way valve, characterized in that, include: The valve body is provided with a valve cavity and four through pipes respectively communicating with the valve cavity; A valve core seat is slidably disposed within the valve cavity. The valve core seat includes two sealing parts and a valve seat cavity disposed between the two sealing parts. The periphery of the sealing parts is sealed against the inner wall of the valve cavity. The sealing parts are connected to the through pipe. The valve seat cavity is always connected to one of the four through pipes. The valve core is provided in two parts, which are respectively disposed in the sealing part. The valve core is used to control the opening and closing between the valve seat cavity and the sealing part.

2. The four-way valve according to claim 1, characterized in that, The sealing part includes a perforated plate spaced apart and a connecting end. The perforated plate communicates with the valve seat cavity, and the valve core is slidably connected to the connecting end. When the valve core is in the closed state, the valve core blocks the perforated plate.

3. The four-way valve according to claim 2, characterized in that, The valve core includes a core plate and a slide rod. One end of the slide rod is fixed to the core plate, and the slide rod slides through the connecting end. The core plate is used to seal the orifice plate.

4. The four-way valve according to claim 3, characterized in that, The valve core also includes an elastic element, one end of which is connected to the core plate to provide elastic force to the valve core.

5. The four-way valve according to claim 4, characterized in that, The elastic element is sleeved on the slide rod, with one end of the elastic element abutting against the core plate and the other end abutting against the connecting end; when the valve core is in the open state, the elastic element is compressed; Alternatively, one end of the elastic element is connected to the core plate, and the other end is connected to the orifice plate; when the valve core is in the open state, the elastic element is stretched.

6. The four-way valve according to claim 3, characterized in that, The orifice plate is provided with a through hole, and the diameter of the through hole gradually decreases along the direction from the connecting end to the orifice plate; the outer peripheral side of the core plate is adapted to the inner peripheral side of the through hole; when the valve core is in the closed state, at least part of the core plate is located in the through hole.

7. The four-way valve according to claim 1, characterized in that, The valve body includes a valve body portion, the valve cavity is located in the valve body portion, and the through pipe includes through pipe one, through pipe two, through pipe three, and through pipe four. Through pipe one and through pipe two are respectively located on the periphery of the valve body portion, and through pipe one is always in communication with the valve seat cavity. Through pipe three and through pipe four are respectively located at opposite ends of the valve body portion, and the inner diameter of the valve body portion is larger than the inner diameter of through pipe three and through pipe four.

8. The four-way valve according to claim 7, characterized in that, The second connecting pipe includes a first port, a second port, and a third port that are connected together. The first port and the second port are spaced apart and are respectively connected to the valve cavity. The first port is located adjacent to the third connecting pipe, and the second port is located adjacent to the fourth connecting pipe.

9. The four-way valve according to claim 8, characterized in that, The blocking part includes a first blocking part and a second blocking part. The first blocking part is located between the valve seat cavity and the third through pipe, and the second blocking part is located between the valve seat cavity and the fourth through pipe. The valve core includes a first valve core and a second valve core. The first valve core is disposed in the first blocking part, and the second valve core is disposed in the second blocking part. When the first sealing part moves to the third through pipe, the first sealing part seals the first port and is connected to the third through pipe. The first valve core is in the open state, the second valve core is in the closed state, and the fourth through pipe is connected to the second port. When the second sealing part moves to the fourth through pipe, the second sealing part seals the second port and is connected to the fourth through pipe. The second valve core is in the open state, the first valve core is in the closed state, and the third through pipe is connected to the first port.

10. A heat pump unit, characterized in that, include: A coil, the coil including a coolant flow channel and a water flow channel, the coolant flow channel covering the water flow channel; Heat exchanger; A compressor, which is connected to the heat exchanger; The four-way valve according to any one of claims 1 to 9, the four-way valve includes a through pipe, the through pipe including through pipe one, through pipe two, through pipe three and through pipe four; through pipe one is connected to the outlet of the coolant flow channel, through pipe two is connected to the inlet of the coolant flow channel, through pipe three is connected to the compressor, and through pipe four is connected to the heat exchanger.

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