Heat pump four-way reversing valve

Abstract

The utility model relates to air conditioner valve technical field discloses heat pump four -way reversing valve, including reversing valve body, and having valve chamber in it, the inner wall of valve chamber has two chutes, first pipe, second pipe, third pipe and fourth pipe have on reversing valve body respectively, reversing column, its both sides outer wall all have two side blocks, and the two side blocks of its both sides outer wall are slidably installed in the two chutes of valve chamber inner wall respectively, and it has first channel, second channel and third channel respectively in it, the utility model reduces the situation that refrigerant leaks from the port to the valve chamber, avoids the phenomenon that high temperature and high pressure refrigerant enters the valve chamber and influences the pressure imbalance of reversing column both ends piston, and simultaneously, the flowing mode of this kind of refrigerant also avoids the phenomenon that high temperature and high pressure refrigerant appears turbulence, guarantees the smooth flow of refrigerant, makes heat pump four -way reversing valve can be normally used.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning valve technology, and in particular to a heat pump four-way reversing valve. Background Technology

[0002] The four-way reversing valve of a heat pump is the core control component that enables the switching between cooling and heating modes in a heat pump system. By changing the flow direction of the refrigerant in the system, it allows the heat pump to flexibly switch operating modes and is widely used in heat pump equipment such as household air conditioners, air source water heaters, and commercial central air conditioning systems.

[0003] An existing four-way reversing valve and refrigeration system (authorization announcement number: CN215980947U) uses a slide valve to slide horizontally within the valve cavity to switch between channels within the valve body. However, in actual use, the refrigerant needs to flow through the valve cavity of the valve body first. Because the valve cavity around the slide valve has a certain space, when the refrigerant enters the valve cavity around the slide valve, it easily generates a force on the pistons at both ends of the slide valve, causing an imbalance in the pressure on the pistons at both ends of the slide valve. This can easily cause the slide valve to slide horizontally, forming a "half-reversing" situation. At the same time, the refrigerant flow through the valve cavity around the slide valve is prone to turbulence, further increasing the chaotic flow direction of the refrigerant within the valve cavity, causing a sudden change in the compressor suction pressure, and affecting the normal operation of the heat pump four-way reversing valve. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a four-way reversing valve for heat pumps, which solves the aforementioned problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: The heat pump four-way reversing valve includes: A reversing valve body has a valve chamber inside, the inner wall of the valve chamber has two sliding grooves, and the reversing valve body has a first pipe, a second pipe, a third pipe and a fourth pipe respectively; The reversing column is movably installed in the valve cavity. It has two side blocks on both outer walls. The two side blocks on both outer walls are slidably installed in two grooves on the inner wall of the valve cavity. Each groove has a first channel, a second channel, and a third channel. The outer surface of the port of the first channel, the second channel, and the third channel on the reversing column has a first mounting groove. A first sealing ring is provided in each of the multiple first mounting grooves. Two piston rod assemblies are respectively located on both sides of the reversing column in the valve cavity. When the two piston rod assemblies are subjected to the pressure difference of the refrigerant, they can push the reversing column to slide in the valve cavity, thereby realizing the switching of the internal channels of the heat pump four-way reversing valve.

[0006] Preferably, the first pipe on the reversing valve body is connected to the fourth pipe through the third channel inside the reversing column, and the second pipe on the reversing valve body is connected to the third pipe through the second channel inside the reversing column.

[0007] Preferably, the first pipe on the reversing valve body is connected to the second pipe through the first channel inside the reversing column, and the third pipe on the reversing valve body is connected to the fourth pipe through the second channel inside the reversing column.

[0008] Preferably, the multiple first sealing rings on the outer wall of the reversing column are all sealed and fitted to the inner wall of the valve cavity of the reversing valve body.

[0009] Preferably, the outer walls at both ends of the reversing column are provided with second mounting grooves, and a second sealing ring is provided in each of the two second mounting grooves. The two second sealing rings are sealed and fitted to the inner wall of the valve cavity of the reversing valve body.

[0010] Preferably, the piston rod assembly includes: The connecting rod is fixedly installed at one end of the reversing column; The piston is fixedly mounted on one side of the connecting rod and movably mounted in the valve chamber of the reversing valve body. Its outer side wall has a sealing ring, which is sealed and fitted against the inner wall of the valve chamber.

[0011] Preferably, the two ends of the reversing valve body have a first port and a second port respectively. The valve cavity inside the reversing valve body is divided into a first cavity and a second cavity by a reversing column. The first port of the reversing valve body is connected to the first cavity, and the second port of the reversing valve body is connected to the second cavity.

[0012] This application incorporates a reversing column within the valve cavity of the reversing valve body. The reversing column contains a first channel, a second channel, and a third channel, with the second channel being a U-shaped channel. This allows high-temperature, high-pressure refrigerant to flow directly into the second and fourth pipes via either the first or third channel within the reversing column. Simultaneously, a first sealing ring is provided on the outer surface of the ports of the first, second, and third channels on the reversing column. This ensures the sealing of the ports of the first, second, and third channels during channel switching, reducing refrigerant leakage into the valve cavity. It also prevents high-temperature, high-pressure refrigerant from entering the valve cavity and causing pressure imbalances on the pistons at both ends of the reversing column. Furthermore, this refrigerant flow pattern avoids turbulence, ensuring a stable refrigerant flow and enabling the heat pump four-way reversing valve to operate normally. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2This is a structural schematic diagram of the first side cross-section of the present invention; Figure 3 This is a structural schematic diagram of the second side cross-section of the present invention; Figure 4 This is a structural schematic diagram of the third side cross-section of the present invention; Figure 5 This is a partial cross-sectional structural diagram of the present invention; Figure 6 This is a partial cross-sectional structural diagram of the reversing valve body of this utility model; Figure 7 This is a schematic diagram of the structure in plan view of this utility model; Figure 8 This is a structural schematic diagram of the present invention from a first explosion perspective; Figure 9 This is a structural schematic diagram of the present invention from a second explosion perspective.

[0014] In the diagram: 100, reversing valve body; 101, valve chamber; 1011, first chamber; 1012, second chamber; 1013, slide groove; 102, first opening; 103, second opening; 110, first pipe; 120, second pipe; 130, third pipe; 140, fourth pipe; 200, reversing column; 201, first channel; 202, second channel; 203, third channel; 204, first mounting groove; 205, second mounting groove; 210, first sealing ring; 220, second sealing ring; 230, side block; 300, piston rod assembly; 310, connecting rod; 320, piston. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In existing heat pump four-way reversing valves, the valve cavity surrounding the slide valve has a certain space. When refrigerant enters the valve cavity surrounding the slide valve, it easily generates a force on the pistons at both ends of the slide valve, causing an imbalance in the pressure on the pistons at both ends of the slide valve. This can easily cause the slide valve to slide in a horizontal position, forming a "partial reversing" situation. At the same time, the refrigerant flow through the valve cavity surrounding the slide valve is prone to turbulence, further increasing the chaotic flow direction of the refrigerant in the valve cavity, causing a sudden change in the compressor suction pressure, and affecting the normal operation of the heat pump four-way reversing valve. To solve the above problems, this embodiment discloses a heat pump four-way reversing valve including: Figure 1 The reversing valve body 100 shown; as Figure 1 The diagram shows the commutator 200 and two piston rod assemblies 300.

[0017] like Figure 1 As shown, the reversing valve body 100 has a first pipe 110, a second pipe 120, a third pipe 130, and a fourth pipe 140. The first pipe 110 is the interface for connecting to the compressor discharge pipe, i.e., the high-pressure discharge port. The high-temperature and high-pressure refrigerant discharged from the compressor enters the reversing valve body 100 through the first pipe 110. The third pipe 130 is the interface for connecting to the compressor suction pipe, i.e., the low-pressure suction port. The low-temperature and low-pressure refrigerant, after absorbing heat and vaporizing in the evaporator, is drawn into the compressor through the third pipe 130. The second pipe 120 is connected to the indoor heat exchanger. The fourth pipe 140 is connected to the outdoor heat exchanger.

[0018] like Figure 2 As shown, in order to install the reversing column 200, the reversing valve body 100 has a valve cavity 101, and the reversing column 200 is movably installed in the valve cavity 101. At the same time, the inner wall of the valve cavity 101 has two sliding grooves 1013, and the outer walls on both sides of the reversing column 200 have two side blocks 230. The two side blocks 230 on the outer walls on both sides are slidably installed in the two sliding grooves 1013 on the inner wall of the valve cavity 101. The reversing column 200 has a first channel 201, a second channel 202 and a third channel 203, respectively. The second channel 202 is a U-shaped channel.

[0019] Continue as Figure 2 As shown, when refrigeration is in operation, the first pipe 110 on the reversing valve body 100 is connected to the fourth pipe 140 through the third channel 203 in the reversing column 200. At this time, the second pipe 120 on the reversing valve body 100 is connected to the third pipe 130 through the second channel 202 in the reversing column 200. This connects the compressor exhaust pipe to the outdoor heat exchanger (which is the condenser and dissipates heat) and the suction pipe to the indoor heat exchanger (which is the evaporator and absorbs heat), thereby achieving indoor cooling.

[0020] like Figure 4 As shown, when heating is in operation, the first pipe 110 on the reversing valve body 100 is connected to the second pipe 120 through the first channel 201 inside the reversing column 200. At this time, the third pipe 130 on the reversing valve body 100 is connected to the fourth pipe 140 through the second channel 202 inside the reversing column 200. The compressor exhaust pipe is then connected to the indoor heat exchanger (which is the condenser at this time, providing heat dissipation and heating), and the suction pipe is connected to the outdoor heat exchanger (which is the evaporator at this time, absorbing heat from the outside), thereby achieving indoor temperature rise.

[0021] like Figure 5As shown, two piston rod assemblies 300 are respectively disposed on both sides of the reversing column 200 in the valve cavity 101. When the two piston rod assemblies 300 are subjected to the pressure difference of the refrigerant, they can push the reversing column 200 to slide in the valve cavity 101, thereby realizing the switching of the internal channel of the heat pump four-way reversing valve. The piston rod assembly 300 includes a connecting rod 310 and a piston 320. The connecting rod 310 is fixedly installed at one end of the reversing column 200. One side of the piston 320 is fixedly installed at the other end of the connecting rod 310, and it is movably installed in the valve cavity 101 of the reversing valve body 100. Its outer side wall has a sealing ring, and the sealing ring of its outer side wall is sealed and attached to the inner wall of the valve cavity 101.

[0022] Continue as Figure 5 As shown, the reversing valve body 100 has a first port 102 and a second port 103 at both ends. The valve chamber 101 inside the reversing valve body 100 is divided into a first chamber 1011 and a second chamber 1012 by the reversing column 200. The first port 102 of the reversing valve body 100 is connected to the first chamber 1011, and the second port 103 of the reversing valve body 100 is connected to the second chamber 1012. A pilot valve (not shown in the figure) is provided on the back side of the reversing valve body 100. The first port 102 and the second port 103 at both ends of the reversing valve body 100 are connected to the pilot valve interface on the back side of the reversing valve body 100 through two capillary tubes. The pilot valve is controlled by an electromagnetic coil, which drives the armature and valve needle inside the pilot valve to move, change the refrigerant pressure transmission path, and play the role of transmitting pressure. This helps the reversing column 200 slide in the valve chamber 101, realizing the reversing action of the channel inside the reversing valve body 100.

[0023] like Figure 8 As shown, the outer surfaces of the ports of the first channel 201, the second channel 202, and the third channel 203 on the commutator 200 each have a first mounting groove 204, and a first sealing ring 210 is provided in each of the multiple first mounting grooves 204; the multiple first sealing rings 210 on the outer wall of the commutator 200 are sealed and fitted to the inner wall of the valve cavity 101 of the commutator valve body 100; this ensures the sealing of the ports of the first channel 201, the second channel 202, and the third channel 203 in the commutator 200 when the commutator 200 is switching channels, and reduces the possibility of refrigerant leaking from the ports into the valve cavity 101.

[0024] like Figure 9 As shown, the outer walls at both ends of the reversing column 200 have second mounting grooves 205, and each of the two second mounting grooves 205 is provided with a second sealing ring 220. The two second sealing rings 220 are sealed and fitted to the inner wall of the valve cavity 101 of the reversing valve body 100, thus ensuring the sealing performance of the reversing column 200 when it slides in the valve cavity 101.

[0025] This application provides a reversing column 200 within the valve chamber 101 of the reversing valve body 100. The reversing column 200 has a first channel 201, a second channel 202, and a third channel 203. The second channel 202 is a U-shaped channel, allowing high-temperature, high-pressure refrigerant to flow directly into the second pipe 120 and the fourth pipe 140 via the first channel 201 or the third channel 203 within the reversing column 200, respectively. Simultaneously, a first sealing ring 210 is provided on the outer surface of the ports of the first channel 201, second channel 202, and third channel 203 on the reversing column 200. This design ensures the sealing of the ports of the first channel 201, the second channel 202, and the third channel 203 within the reversing column 200 during channel switching, reducing the possibility of refrigerant leakage from the ports into the valve chamber 101. It also prevents high-temperature, high-pressure refrigerant from entering the valve chamber 101 and causing pressure imbalance at both ends of the piston 320 of the reversing column 200. Furthermore, this refrigerant flow pattern avoids turbulence caused by high-temperature, high-pressure refrigerant, ensuring a stable refrigerant flow and enabling the heat pump four-way reversing valve to operate normally.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A four-way reversing valve for a heat pump, characterized in that, include: The reversing valve body (100) has a valve chamber (101) inside, and the inner wall of the valve chamber (101) has two sliding grooves (1013). The reversing valve body (100) has a first pipe (110), a second pipe (120), a third pipe (130) and a fourth pipe (140) respectively. The reversing column (200) is movably installed in the valve cavity (101). It has two side blocks (230) on both sides of its outer wall. The two side blocks (230) on both sides of its outer wall are slidably installed in two sliding grooves (1013) on the inner wall of the valve cavity (101). They have a first channel (201), a second channel (202) and a third channel (203) respectively. The outer surface of the port of the first channel (201), the second channel (202) and the third channel (203) on the reversing column (200) has a first mounting groove (204). A first sealing ring (210) is provided in each of the multiple first mounting grooves (204). Two piston rod assemblies (300) are respectively arranged on both sides of the reversing column (200) in the valve cavity (101). When the two piston rod assemblies (300) are subjected to the pressure difference of the refrigerant, they can push the reversing column (200) to slide in the valve cavity (101) to realize the switching of the internal channel of the heat pump four-way reversing valve.

2. The heat pump four-way reversing valve according to claim 1, characterized in that, The first pipe (110) on the reversing valve body (100) is connected to the fourth pipe (140) through the third channel (203) in the reversing column (200). At this time, the second pipe (120) on the reversing valve body (100) is connected to the third pipe (130) through the second channel (202) in the reversing column (200).

3. The heat pump four-way reversing valve according to claim 1, characterized in that, The first pipe (110) on the reversing valve body (100) is connected to the second pipe (120) through the first channel (201) in the reversing column (200). At this time, the third pipe (130) on the reversing valve body (100) is connected to the fourth pipe (140) through the second channel (202) in the reversing column (200).

4. The heat pump four-way reversing valve according to claim 1, characterized in that, The multiple first sealing rings (210) on the outer side wall of the reversing column (200) are all sealed and attached to the inner wall of the valve cavity (101) of the reversing valve body (100).

5. The heat pump four-way reversing valve according to claim 4, characterized in that, The outer walls at both ends of the reversing column (200) are provided with second mounting grooves (205), and a second sealing ring (220) is provided in each of the two second mounting grooves (205). The two second sealing rings (220) are sealed and attached to the inner wall of the valve cavity (101) of the reversing valve body (100).

6. The heat pump four-way reversing valve according to claim 5, characterized in that, The piston rod assembly (300) includes: Linkage (310), which is fixedly installed at one end of the reversing column (200); The piston (320) is fixedly mounted on one side of the connecting rod (310) and movably mounted in the valve chamber (101) of the reversing valve body (100). Its outer side wall has a sealing ring, which is sealed and fitted to the inner wall of the valve chamber (101).

7. The heat pump four-way reversing valve according to claim 6, characterized in that, The reversing valve body (100) has a first port (102) and a second port (103) at both ends. The valve chamber (101) inside the reversing valve body (100) is divided into a first chamber (1011) and a second chamber (1012) by a reversing column (200). The first port (102) of the reversing valve body (100) is connected to the first chamber (1011), and the second port (103) of the reversing valve body (100) is connected to the second chamber (1012).

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