Drainage device and heat pump system

Abstract

The application relates to the technical field of heat pumps, and provides a drainage device and a heat pump system. The drainage device comprises a pipeline assembly, a switch assembly, a magnetic force assembly and a counterweight. The pipeline assembly comprises a refrigerant communication pipe and a drainage pipe. The switch assembly comprises a first switch arranged on the refrigerant communication pipe and a second switch arranged on the drainage pipe. One of the first switch and the second switch is a power-on closed switch, and the other of the first switch and the second switch is a temperature memory switch. The magnetic force assembly comprises a force applying piece and an opening and closing piece which are magnetically matched with each other. The opening and closing piece is slidably arranged in the drainage pipe to open or cut off the drainage pipe. The gravity and the refrigerant from the refrigerant communication pipe can drive the counterweight to move, and the counterweight drives the force applying piece to move to drive the opening and closing piece to slide. In the weather with low temperature, when power failure or the user mistakenly turns off the power supply, the drainage device can automatically drain the water in the water circuit of the heat pump system.

Description

Technical Field

[0001] This application relates to the field of heat pump technology, and provides a drainage device and a heat pump system. Background Technology

[0002] Both combined underfloor and radiant water heating systems and combined air conditioning systems using refrigerant and water exchange heat. The water flows through the refrigerant, transferring its cooling or heating energy to the indoor heating pipes, air conditioning units (for combined underfloor and radiant systems), and fan coil units (for combined underfloor and radiant systems), thereby regulating the indoor temperature. Because these products have water pipes for water flow, and water typically freezes at 0°C, freezing can cause the pipes and components involved in water circulation to crack or deform due to freezing.

[0003] In related technologies, to solve the problem of products being damaged by freezing, a manual drain switch is usually installed at the lowest point of the water pipe. In cold weather, when there is a power outage, the user can manually open the drain switch to drain the water from the water pipe and prevent the product from being damaged by freezing.

[0004] However, in cold weather, if there is a power outage or the user accidentally turns off the power, and the user forgets to turn on the drain switch, the water pipes and components involved in water circulation will still be damaged by freezing due to the water freezing. Summary of the Invention

[0005] In view of this, embodiments of this application provide a drainage device and a heat pump system that facilitate drainage.

[0006] One embodiment of this application provides a drainage device, including:

[0007] Piping components, including refrigerant connection pipes and drain pipes;

[0008] The switching assembly includes a first switch disposed on the refrigerant connecting pipe and a second switch disposed on the drain pipe, wherein one of the first switch and the second switch is an energized closing switch and the other of the first switch and the second switch is a temperature memory switch;

[0009] A magnetic component includes a force-applying component and an opening / closing component that are magnetically coupled to each other. The opening / closing component is slidably disposed in the drain pipe to open or close the drain pipe.

[0010] The counterweight, driven by gravity and refrigerant from the refrigerant connecting pipe, moves, which in turn moves the force-applying component to drive the opening / closing component to slide.

[0011] In some embodiments, the counterweight slides in the vertical direction.

[0012] In some embodiments, the drainage device includes a first elastic element in contact with the counterweight, the first elastic element exerting a downward force on the counterweight.

[0013] In some embodiments, the drainage device includes a transmission assembly that connects the counterweight and the force-applying component.

[0014] In some embodiments, the transmission assembly includes a transmission medium;

[0015] The transmission medium is located between the counterweight and the force-applying component, and the force of the counterweight is transmitted to the force-applying component through the transmission medium, or...

[0016] The transmission assembly includes a reversing structure connected to the force-applying member. The transmission medium is located between the counterweight and the reversing structure, and the force of the counterweight is transmitted to the reversing structure through the transmission medium.

[0017] In some embodiments, the reversing structure includes a gear and a transmission rod, the gear being connected to the force-applying member and meshing with the transmission rod, the transmission medium being located between the counterweight and the transmission rod, and the force of the counterweight being transmitted to the transmission rod through the transmission medium to push the transmission rod to slide.

[0018] In some embodiments, the force-applying member is configured as a strip structure, and at least one end of the force-applying member in the length direction generates a magnetic force with the opening and closing member.

[0019] In some embodiments, the transmission assembly includes a transmission tube, and the transmission medium is housed within the transmission tube.

[0020] In some embodiments, the counterweight includes a counterweight body, a first sliding part, and a second sliding part. The first sliding part and the second sliding part are both disposed on the same side of the counterweight body. The first sliding part is slidably inserted into the refrigerant connecting pipe, and the second sliding part is slidably inserted into the transmission pipe.

[0021] In some embodiments, the drainage device includes a second elastic element that contacts the force-applying element or the transmission assembly;

[0022] When the refrigerant connecting pipe is in the closed state, the counterweight, the transmission assembly, and the force-applying component drive the second elastic element to undergo elastic deformation.

[0023] When the refrigerant connecting pipe is in a conductive state, the elastic force of the second elastic element drives the counterweight, the transmission assembly, and the force-applying element to move.

[0024] In some embodiments, the piping assembly includes a bypass pipe connected to the portion of the refrigerant connecting pipe located between the counterweight and the first switch, wherein at least a portion of the refrigerant in the refrigerant connecting pipe can flow out unidirectionally through the bypass pipe.

[0025] In some embodiments, the bypass conduit includes a capillary tube communicating with the portion of the refrigerant connecting pipe located between the counterweight and the first switch; and / or,

[0026] The bypass pipeline includes a bypass connecting pipe and a one-way valve disposed on the bypass connecting pipe. The bypass connecting pipe is connected to the portion of the refrigerant connecting pipe located between the counterweight and the first switch.

[0027] In some embodiments, at least one of the force-applying element and the opening / closing element is a permanent magnet.

[0028] In some embodiments, the opening and closing element can block the flow section of the drain pipe to stop the drain pipe, or the opening and closing element can avoid the flow section of the drain pipe to stop the drain pipe.

[0029] In some embodiments, the circumferential wall of the drain pipe is formed with an installation port, through which the opening / closing element extends into the drain pipe.

[0030] In some embodiments, the drainage device includes a guide cavity communicating with the mounting port, the guide cavity intersecting and communicating with the drain pipe, and the opening / closing member sliding along the guide cavity.

[0031] In some embodiments, the guide cavity extends downward from the mounting port, the upper end of the guide cavity communicates with the mounting port, the lower end of the guide cavity is closed, the opening and closing element is slidably disposed in the guide cavity in a sealing manner, and an air hole is formed in the lower part of the guide cavity.

[0032] In some embodiments, the guide cavity extends upward from the mounting port, the lower end of the guide cavity communicates with the mounting port, and the opening / closing element is slidably disposed in the guide cavity in a sealing manner.

[0033] In some embodiments, at least one of the first switch and the second switch can be adjusted to remain in the closed state.

[0034] This application also provides a heat pump system, including a refrigerant pipeline, a water circuit, and a drainage device as described in any of the above, wherein the refrigerant connecting pipe is connected to the refrigerant pipeline, and the water circuit is connected to the drainage pipe.

[0035] The drainage device provided in this application embodiment has a switching assembly that can open and close in response to changes in external temperature and electrical status. Thus, by responding to temperature and electrical status (power on or power off) via a first switch and a second switch, both the refrigerant connecting pipe and the drain pipe are connected or disconnected, allowing the drainage device to automatically drain water in response to temperature and electrical status. When the energized closed switch is in the power-off state, and the temperature memory switch senses a temperature that meets the set temperature, the drainage device uses refrigerant to drive a counterweight, which in turn drives a force-applying component to slide, allowing the opening and closing component to open the drain pipe and discharge water from the heat pump system's water circuit. Therefore, in cold weather, when there is a power outage or the user accidentally turns off the power, the drainage device can automatically drain water from the heat pump system's water circuit without user intervention. This facilitates drainage and minimizes the risk of the heat pump system's water circuit and components involved in water circulation freezing and being damaged. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the drainage device in the first embodiment of this application, wherein the drainage device is in a non-draining state and the opening and closing parts are in the blocking position;

[0037] Figure 2 for Figure 1 The diagram shows the structure of the drainage device in the drainage state, where the opening and closing parts are in the conducting position;

[0038] Figure 3 This is a schematic diagram of the drainage device in the second embodiment of this application, wherein the drainage device is in a non-draining state and the opening and closing parts are in the blocking position;

[0039] Figure 4 for Figure 3 The diagram shows the structure of the drainage device in the drainage state, where the opening and closing parts are in the conducting position;

[0040] Figure 5 This is a schematic diagram of the drainage device in the third embodiment of this application, wherein the drainage device is in a non-draining state and the opening and closing parts are in the blocking position.

[0041] Explanation of reference numerals in the attached figures

[0042] Piping assembly 1; refrigerant connecting pipe 11; drain pipe 12; mounting port 12a; stepped surface 12b; bypass pipe 13; capillary tube 131; bypass connecting pipe 132; one-way valve 133; switch assembly 2; first switch 21; second switch 22; magnetic assembly 3; force application component 31; opening and closing component 32; counterweight component 4; counterweight body 41; first sliding part 42; second sliding part 43; first elastic component 5; transmission assembly 6; transmission medium 61; reversing structure 62; gear 621; transmission rod 622; transmission pipe 63; second elastic component 7; guide cavity 8; vent 8a; first limiting component 9; second limiting component 10; limiting box 20; third limiting component 30; third elastic component 40. Detailed Implementation

[0043] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific implementation should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0044] In the description of the embodiments of this application, "upper" and "lower" refer to the orientation or positional relationship. Figure 1 , Figure 3 and Figure 5 The orientation or location indicated. The terms "first / second" are merely to distinguish different objects and do not imply any similarity or connection between them. It should be understood that these orientation terms are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0045] Please see Figures 1 to 5 This application provides a drainage device, which includes a pipe assembly 1, a switch assembly 2, a magnetic assembly 3, and a counterweight 4. The drainage device is used in a heat pump system.

[0046] Please see Figure 1 and Figure 3 Piping assembly 1 includes a refrigerant connecting pipe 11 and a drain pipe 12. The refrigerant connecting pipe 11 is used to connect the refrigerant piping of the heat pump system, and the drain pipe 12 is used to connect the water piping of the heat pump system.

[0047] Please see Figure 1 and Figure 3 The switch assembly 2 includes a first switch 21 and a second switch 22. The first switch 21 is disposed on the refrigerant connecting pipe 11. The second switch 22 is disposed on the drain pipe 12. One of the first switch 21 and the second switch 22 is an energized closing switch, and the other of the first switch 21 and the second switch 22 is a temperature memory switch.

[0048] A closed switch is a switch that closes when energized and opens when de-energized.

[0049] A temperature memory switch is a switch that opens and closes based on temperature changes. It's understandable that the opening and closing of a temperature memory switch is primarily related to the temperature level.

[0050] For example, a temperature memory switch can be turned on and off according to a set temperature. The set temperature can be a temperature value or a temperature range. For instance, in cold weather, in order to activate the temperature memory switch before the water freezes, the set temperature can be greater than or equal to the freezing point of water in the current environment. For example, under standard atmospheric pressure, the set temperature can be 0°C or 1°C, etc.

[0051] The first switch 21 is used to connect or disconnect the refrigerant connecting pipe 11. The second switch 22 is used to connect or disconnect the drain pipe 12. That is, if the switch is closed when energized to connect or disconnect the refrigerant connecting pipe 11, then the temperature memory switch is used to connect or disconnect the drain pipe 12. If the switch is closed when energized to connect or disconnect the drain pipe 12, then the temperature memory switch is used to connect or disconnect the refrigerant connecting pipe 11.

[0052] The magnetic component 3 includes a force-applying element 31 and an opening / closing element 32 that are magnetically coupled to each other. The opening / closing element 32 is slidably disposed in the drain pipe 12 to open or close the drain pipe 12. The magnetic coupling between the opening / closing element 32 and the force-applying element 31 means that a magnetic force can be generated between the opening / closing element 32 and the force-applying element 31.

[0053] Gravity and the refrigerant from the refrigerant connecting pipe 11 can drive the counterweight 4 to move. That is, the refrigerant from the refrigerant connecting pipe 11 can exert a force on the counterweight 4. The switching assembly 2 can control the refrigerant in the refrigerant connecting pipe 11 to change the magnitude of the force exerted by the refrigerant on the counterweight 4, thereby changing the magnitude of the net force on the counterweight 4 to drive the counterweight 4 to move.

[0054] The counterweight 4 drives the force-applying component 31 to move, thereby driving the opening / closing component 32 to slide. Specifically, during the movement of the force-applying component 31 driven by the counterweight 4, the magnetic force between the force-applying component 31 and the opening / closing component 32 changes, thereby driving the opening / closing component 32 to slide within the drain pipe 12, thus opening or closing the drain pipe 12. For example, the counterweight 4 drives the force-applying component 31 to the working position, generating a magnetic force between the force-applying component 31 and the opening / closing component 32.

[0055] It is understandable that the refrigerant in the refrigerant piping of the heat pump system is under pressure. Therefore, the opening and closing of the refrigerant connecting pipe 11 can be controlled by the first switch 21, so that the refrigerant exerts a force on the counterweight 4. For example, when the refrigerant connecting pipe 11 is in the open state, the refrigerant pressure in the refrigerant connecting pipe 11 causes the counterweight 4 to move against gravity in the first direction; when the refrigerant connecting pipe 11 is in the closed state, the refrigerant pressure in the refrigerant connecting pipe 11 decreases to the point that it cannot overcome gravity, and the counterweight 4 moves in the second direction, wherein the first direction and the second direction are opposite.

[0056] The drainage device provided in this embodiment allows the switch assembly 2 to open and close in response to changes in external temperature and electrical status. Thus, by responding to temperature and electrical status (power on or power off) via the first switch 21 and the second switch 22, both the refrigerant connecting pipe and the drain pipe are connected or disconnected, enabling automatic drainage. When the power-on closed switch is in the power-off state and the temperature memory switch senses a temperature that meets the set temperature, the drainage device uses refrigerant to drive the counterweight 4. The counterweight 4 drives the force-applying component 31 to move, thereby driving the opening / closing component 32 to slide, allowing it to connect the drain pipe 12 and drain water from the heat pump system's water circuit. Therefore, in cold weather, when there is a power outage or the user accidentally turns off the power, the drainage device can automatically drain water from the heat pump system's water circuit without manual operation. This facilitates drainage and minimizes the risk of the heat pump system's water circuit and components involved in water circulation freezing and being damaged.

[0057] This application provides a heat pump system, which includes a refrigerant pipeline, a water circuit, and a drainage device as described in any embodiment of this application. The refrigerant connecting pipe 11 is connected to the refrigerant pipeline, and the water circuit is connected to the drain pipe.

[0058] The heat pump system of this application embodiment provides an automatic drainage function in low temperature and power failure situations through a drainage device, so as to prevent the water circuit and components involved in water circulation from freezing and being damaged by water freezing in cold weather, power outages, or when the user accidentally turns off the power.

[0059] The refrigerant piping is the piping that supplies refrigerant to the heat pump system. The water piping is the piping that supplies water to the heat pump system. The refrigerant connecting pipe 11 being connected to the refrigerant piping means that the refrigerant in the refrigerant connecting pipe 11 originates from the refrigerant piping of the heat pump system. The drain pipe 12 being connected to the water piping means that the water in the drain pipe 12 originates from the water piping of the heat pump system. In other words, when the drain pipe 12 is open, water in the water piping of the heat pump system is discharged through the drain pipe 12.

[0060] In some embodiments, the heat pump system can be a dual-supply heat pump system, that is, the terminal of the heat pump system can have two functional structures, such as underfloor heating and air conditioning indoor unit (or fan coil unit).

[0061] In some embodiments, the heat pump system can also be a heat pump multi-generation system, that is, the terminal of the heat pump system can also have two or more functional structures, such as underfloor heating, hot water tank and air conditioning indoor unit (or fan coil unit).

[0062] For example, in one embodiment, the heat pump system includes a heat pump main unit with a main unit refrigerant pipe and a main unit water pipe, a refrigerant connecting pipe 11 connected to the refrigerant pipeline through the main unit refrigerant pipe, and a drain pipe 12 connected to the water pipeline through the main unit water pipe.

[0063] In this embodiment, the heat pump system uses both surface and ground water. The refrigerant connecting pipe 11 can be connected to the refrigerant pipeline through the main unit's refrigerant pipe, and the drain pipe 12 can be connected to the water pipeline through the main unit's water pipe. That is, the main unit's refrigerant pipe is connected to the refrigerant pipeline, and the main unit's water pipe is connected to the water pipeline. The refrigerant in the refrigerant pipeline flows into the refrigerant connecting pipe 11 through the main unit's refrigerant pipe, and the water in the water pipeline flows into the drain pipe 12 through the main unit's water pipe.

[0064] For example, in one embodiment, the heat pump system includes a hydraulic module having a hydraulic refrigerant pipe and a hydraulic water pipe, a refrigerant connecting pipe 11 connected to a refrigerant pipeline through the hydraulic refrigerant pipe, and a drain pipe 12 connected to a water pipeline through the hydraulic water pipe.

[0065] In this embodiment, the heat pump system uses natural refrigerant and local water. The refrigerant connecting pipe 11 can be connected to the refrigerant pipeline through the hydraulic refrigerant pipe, and the drain pipe 12 can be connected to the water pipeline through the hydraulic water pipe. That is to say, the hydraulic refrigerant pipe of the hydraulic module is connected to the refrigerant pipeline, and the hydraulic water pipe is connected to the water pipeline. The refrigerant in the refrigerant pipeline flows into the refrigerant connecting pipe 11 through the hydraulic refrigerant pipe, and the water in the water pipeline flows into the drain pipe 12 through the hydraulic water pipe.

[0066] Temperature memory switches may include temperature memory materials. For example, a temperature memory switch may open or close based on changes in the ambient temperature, such as changes in the external temperature, by causing the temperature memory material of the switch to undergo physical deformation.

[0067] For example, the set temperature can be the deformation temperature of the temperature memory material or a temperature preset by the operator.

[0068] Temperature memory switches can also come in various types. For example, in one implementation, the temperature memory switch is not electrically connected to the control circuit of the heat pump system. The temperature memory switch relies entirely on its own characteristics to achieve opening and closing, such as the characteristics of the temperature memory material.

[0069] For example, in some embodiments, the temperature memory switch turns on when the temperature is not lower than a set temperature. "Not lower than the set temperature" means the temperature is equal to or higher than the set temperature. As long as the temperature sensed by the temperature memory switch is not lower than the set temperature, the temperature memory switch can automatically turn on. After the temperature memory switch turns on, if the temperature sensed by the temperature memory switch is lower than the set temperature, the temperature memory switch will automatically turn off. For this type of temperature memory switch, automatic opening and closing can also be achieved after a power outage. In other embodiments, the temperature memory switch can also turn on when the temperature is not higher than a set temperature. "Not higher than the set temperature" means the temperature is equal to or lower than the set temperature. Those skilled in the art will understand that the principle of this type of temperature memory switch is similar to the above, and will not be repeated here.

[0070] In other implementations, the temperature memory switch can also be electrically connected to the control circuit of the heat pump system, that is, the temperature memory switch can cooperate with the control circuit to realize opening and closing.

[0071] For example, in some embodiments, the temperature memory switch can be configured with a temperature sensor, and the temperature memory switch turns on when the temperature is not higher than a set temperature. In the powered-on state, when the temperature sensor senses that the current temperature is not higher than the set temperature, it transmits a first control signal to the control circuit. The control circuit controls the temperature memory switch to turn on according to the received first control signal. When the temperature sensor senses that the current temperature is higher than the set temperature, it transmits a second control signal to the control circuit. The control circuit controls the temperature memory switch to turn off according to the received second control signal. This type of temperature memory switch can open and close when powered on, but after power is off, regardless of temperature changes, the temperature memory switch cannot switch between open and closed states. That is, if the temperature memory switch is in the open state before power is off, it will remain in the open state after power is off, regardless of temperature changes; if the temperature memory switch is in the closed state before power is off, it will remain in the closed state after power is off, regardless of temperature changes. For this type of temperature memory switch, it can be controlled to remain in the open state while powered on. For example, the set temperature can be set to a relatively high value based on the temperature in cold weather. In this way, the temperature memory switch will generally remain open in cold weather, and will not close even in the event of a power outage. In other embodiments, the temperature memory switch can be equipped with a temperature sensor, and the switch will turn on when the temperature is not lower than the set temperature. Those skilled in the art will understand that the principle of this type of temperature memory switch is similar to that described above, and will not be repeated here.

[0072] For example, at least one of the force-applying element 31 and the opening / closing element 32 is a permanent magnet. In some embodiments, the force-applying element 31 may be a permanent magnet, and the opening / closing element 32 may be a magnet-attractable material such as iron, cobalt, nickel, or their alloys. In other embodiments, the opening / closing element 32 may be a permanent magnet, and the force-applying element 31 may be a magnet-attractable material such as iron, cobalt, nickel, or their alloys. In still other embodiments, both the opening / closing element 32 and the force-applying element 31 are permanent magnets.

[0073] For example, there is a magnetic repulsion and / or magnetic attraction between the force-applying member 31 and the opening / closing member 32.

[0074] In other words, if one of the force-applying component 31 and the opening / closing component 32 is a permanent magnet and the other is made of materials such as iron, cobalt, nickel, or their alloys, the force-applying component 31 and the opening / closing component 32 will generate magnetic attraction when they approach each other.

[0075] If both the opening / closing element 32 and the force-applying element 31 are permanent magnets, and the magnetic poles of the same polarity of the opening / closing element 32 and the force-applying element 31 are close to each other, a magnetic repulsion force will be generated between the opening / closing element 32 and the force-applying element 31.

[0076] If both the opening / closing element 32 and the force-applying element 31 are permanent magnets, and the magnetic poles of opposite polarities of the opening / closing element 32 and the force-applying element 31 are close to each other, a magnetic attraction force is generated between the opening / closing element 32 and the force-applying element 31.

[0077] In one embodiment, please refer to Figure 1 and Figure 3 The counterweight 4 slides vertically. That is, the refrigerant from the refrigerant connecting pipe 11 and the weight of the counterweight 4 itself can push the counterweight 4 to slide vertically. For example, one of the first and second directions is upward, and the other is downward. The counterweight 4 slides vertically to drive the force-applying component 31 to move. This ensures that the resultant force of the refrigerant pressure and gravity is in the vertical direction, fully utilizing the weight of the counterweight 4. The force on the counterweight 4 is simple, simplifying its structure.

[0078] As an example, in one embodiment, please refer to Figure 1 and Figure 3 When the refrigerant connecting pipe 11 is in the conductive state, the refrigerant pressure in the refrigerant connecting pipe 11 is greater than the weight of the counterweight 4, causing the counterweight 4 to slide upward; please refer to Figure 2 and Figure 4 When the refrigerant connecting pipe 11 is in the closed state, the refrigerant pressure in the refrigerant connecting pipe 11 is less than the weight of the counterweight 4, causing the counterweight 4 to slide downward.

[0079] In one embodiment, please refer to Figures 1 to 5The drainage device includes a first elastic element 5 that contacts the counterweight 4, and the first elastic element 5 applies a downward force to the counterweight 4. That is, the combined force of the refrigerant pressure, gravity, and the elastic force of the first elastic element 5 can push the counterweight 4 to slide vertically. By increasing the downward force on the counterweight 4 through the elastic force of the first elastic element 5, the counterweight 4 can overcome the refrigerant pressure and move downwards even with its own relatively low weight, thereby reducing the volume and / or mass of the counterweight 4.

[0080] For example, the first elastic element 5 can abut against or be fixedly connected to the counterweight 4. The elastic force of the first elastic element 5 can be applied to the counterweight 4.

[0081] The specific location of the first elastic element 5 is not limited. For example, in one embodiment, please refer to [reference needed]. Figures 1 to 5 The first elastic element 5 can be set at the top or bottom of the counterweight 4.

[0082] In one embodiment, please refer to Figures 1 to 5 The drainage device includes a first limiting member 9. The first limiting member 9 is provided on at least one side of the counterweight 4 along the vertical direction, and restricts the sliding stroke of the counterweight 4. For example, the first limiting member 9 may be provided on the upper side of the counterweight 4; it may be provided on the lower side of the counterweight 4; or it may be provided on both the lower and lower sides of the counterweight 4. The first limiting member 9 blocks the counterweight 4 to limit its sliding stroke. For example, the counterweight 4 may be blocked by the upper first limiting member 9 when sliding upwards to its maximum distance, and / or the counterweight 4 may be blocked by the lower first limiting member 9 when sliding downwards to its maximum distance. This allows the counterweight 4 to slide a set distance.

[0083] In one embodiment, please refer to Figures 1 to 5 The drainage device includes a transmission assembly 6, which connects the counterweight 4 and the force-applying component 31. That is, the force of the counterweight 4 is transmitted to the force-applying component 31 through the transmission assembly 6, thereby driving the force-applying component 31 to move. The transmission assembly 6 can change the movement mode of the force-applying component 31, facilitating easier assembly of the counterweight 4, force-applying component 31, and opening / closing component 32 in complex heat pump system assembly environments.

[0084] In one embodiment, please refer to Figures 1 to 5 The transmission assembly 6 includes a transmission medium 61, which is located between the counterweight 4 and the force-applying component 31. The force of the counterweight 4 is transmitted to the force-applying component 31 through the transmission medium 61. The transmission medium 61 can change the direction of the applied force. This allows for flexible arrangement of the relative position and direction of movement between the counterweight 4 and the force-applying component 31.

[0085] As an example, in one embodiment, please refer to Figures 3 to 5 The counterweight 4 slides vertically, while the force-applying component 31 slides horizontally. The force of the counterweight 4 is transmitted to the force-applying component 31 through the transmission medium 61, thus converting the vertical sliding of the counterweight 4 into the horizontal sliding of the force-applying component 31. In other words, the vertical force generated by the counterweight 4 is converted into a horizontal force through the transmission medium 61. Specifically, the force-applying component 31 can slide to the working position, generating a magnetic force between it and the opening / closing component 32. When the force-applying component 31 slides away from the working position, the magnetic force between it and the opening / closing component 32 weakens.

[0086] In one embodiment, please refer to Figures 1 to 2 The transmission assembly 6 includes a reversing structure 62, which is connected to the force-applying component 31. The transmission medium 61 is located between the counterweight 4 and the reversing structure 62, and the force of the counterweight 4 is transmitted to the reversing structure 62 through the transmission medium 61. The direction of the force can be changed through the transmission medium 61, which facilitates more flexible arrangement of structures such as the counterweight 4, the force-applying component 31, and the drain pipe 12, and also adapts to the complex installation environment of the heat pump system, providing better selectivity.

[0087] The transmission medium 61 refers to a substance capable of transmitting force and changing the direction of the force. The specific type of transmission medium 61 is not limited; it includes, but is not limited to, liquids, gases, or solids. It is understood that when the transmission medium 61 is a solid, it can include multiple granular sub-units. These sub-units can change their positions to alter the direction of the force.

[0088] In one embodiment, please refer to Figures 1 to 5 The transmission assembly 6 includes a transmission tube 63, in which the transmission medium 61 is housed. The transmission tube 63 is used to constrain the transmission medium 61.

[0089] It is understandable that when the transmission medium 61 is a liquid and / or a gas, the space in the transmission pipe 63 is a sealed space to prevent leakage of the transmission medium 61.

[0090] The movement mode of the force-applying member 31 can be changed by the reversing structure 62. For example, in one embodiment, please refer to... Figures 1 to 2The reversing structure 62 includes a gear 621 and a transmission rod 622. The gear 621 is connected to the force-applying member 31 and meshes with the transmission rod 622. The transmission medium 61 is located between the counterweight 4 and the transmission rod 622. The force of the counterweight 4 is transmitted to the transmission rod 622 through the transmission medium 61 to push the transmission rod 622 to slide. Specifically, the transmission rod 622 slides horizontally, driving the gear 621 to rotate, which in turn drives the force-applying member 31 to rotate. Thus, the vertical force generated by the counterweight 4 is converted into a horizontal force through the transmission medium 61, pushing the transmission rod 622 to slide horizontally. The sliding of the transmission rod 622 is converted into the rotation of the force-applying member 31 through the transmission rod 622 and the gear 621. Specifically, the force-applying member 31 can rotate to a working position, and a magnetic force is generated between the force-applying member 31 and the opening / closing member 32.

[0091] The structure of the transmission rod 622 is not limited, and the transmission rod 622 includes, but is not limited to, racks or worm gears and other transmission components that can convert the rotation of the gear 621 into translation.

[0092] In one embodiment, please refer to Figures 1 to 2 The force-applying member 31 is constructed as a strip structure, and at least one end of the force-applying member 31 along its length generates a magnetic force between it and the opening / closing member 32. This means that as long as one end of the force-applying member 31 along its length generates a magnetic force between it and the opening / closing member 32, the opening / closing member 32 can be driven to slide.

[0093] For example, the midpoint of the force-applying member 31 along the length direction is connected to the rotation center of the gear 621, and the sliding direction of the opening and closing member 32 is perpendicular to the rotation axis of the force-applying member 31. As the gear 621 rotates, when one end of the force-applying member 31 along the length direction is closest to the opening and closing member 32, the other end is furthest from the opening and closing member 32.

[0094] In one exemplary embodiment, both the opening / closing element 32 and the force-applying element 31 are permanent magnets. The opening / closing element 32 is constructed as a strip structure, with its two magnetic poles located at opposite ends along the sliding direction. Similarly, the force-applying element 31 has two magnetic poles located at opposite ends along its length. When one end of the force-applying element 31 rotates to its closest point to the opening / closing element 32, if the magnetic pole of the force-applying element 31 near the opening / closing element 32 has the opposite polarity to the magnetic pole of the opening / closing element 32, the opening / closing element 32 will be magnetically attracted and slide towards the force-applying element 31. If the magnetic pole of the force-applying element 31 near the opening / closing element 32 has the same polarity as the magnetic pole of the opening / closing element 32, the opening / closing element 32 will be magnetically repelled and slide away from the force-applying element 31.

[0095] For example, in one embodiment, the opening / closing member 32 slides in the up-down direction. One of the force-applying member 31 and the opening / closing member 32 is a permanent magnet, and the other is made of materials such as iron, cobalt, nickel, or their alloys. When any end of the force-applying member 31 rotates to the closest distance to the opening / closing member 32, the opening / closing member 32 will be driven by the magnetic attraction to slide upward toward the force-applying member 31 to one of the blocking position and the conducting position. When any end of the force-applying member 31 rotates to a position where it is not close to the opening / closing member 32, the opening / closing member 32 will slide downward toward the other of the blocking position and the conducting position due to its own gravity.

[0096] It is understandable that the blocking position refers to the position where the opening and closing element 32 stops the drain pipe 12. The conducting position refers to the position where the opening and closing element 32 opens the drain pipe 12.

[0097] In one embodiment, please refer to Figures 1 to 2 The drainage device includes a second limiting member 10, which is located on the side of the transmission rod 622 away from the transmission medium 61. The second limiting member 10 is used to limit the sliding stroke of the transmission rod 622. The second limiting member 10 blocks the transmission rod 622 to limit its sliding stroke. For example, when the transmission rod 622 slides to its maximum distance in the horizontal direction, it is blocked by the second limiting member 10, thus causing the transmission rod 622 to move a set distance, thereby driving the opening and closing member 32 to rotate a set angle.

[0098] As an example, in one embodiment, please refer to Figures 1 to 2 The transmission rod 622 is partially and slidably inserted into the transmission tube 63. This prevents leakage of the transmission medium 61 from the gap between the opening / closing element 32 and the transmission tube 63.

[0099] As an example, in one embodiment, please refer to Figures 3 to 5 The opening / closing element 32 is slidably housed within the transmission tube 63. The opening / closing element 32 can make sealing contact with the wall surface of the transmission tube 63; in this case, the opening / closing element 32 is equivalent to a piston.

[0100] In one embodiment, please refer to Figures 1 to 5 The counterweight 4 includes a counterweight body 41, a first sliding part 42, and a second sliding part 43. Both the first sliding part 42 and the second sliding part 43 are located on the same side of the counterweight body 41. The first sliding part 42 is slidably inserted into the refrigerant connecting pipe 11, and the second sliding part 43 is slidably inserted into the transmission pipe 63. The first sliding part 42 is slidably inserted into the refrigerant connecting pipe 11 to contact the refrigerant, and the second sliding part 43 is slidably inserted into the transmission pipe 63 to contact the transmission medium 61. Specifically, the first sliding part 42 is slidably inserted into the refrigerant connecting pipe 11 in a sealed manner to prevent refrigerant leakage. The second sliding part 43 is slidably inserted into the transmission pipe 63 in a sealed manner to prevent leakage of the transmission medium 61.

[0101] In one embodiment, please refer to Figures 1 to 5 The first sliding part 42 and the second sliding part 43 are both disposed below the counterweight 41. For example, the refrigerant connecting pipe 11 includes a first horizontal section and a first vertical section extending upward from the first horizontal section; the transmission pipe 63 includes a connected second horizontal section and a second vertical section extending upward from the second horizontal section; the first sliding part 42 is slidably disposed within the first vertical section; the second sliding part 43 is slidably disposed within the second vertical section; and a portion of the transmission rod 622 or the force-applying member 31 is slidably accommodated within the second horizontal section. This facilitates the refrigerant and gravity pushing the counterweight 4 up and down, while the up and down sliding of the counterweight 4 can be converted by the transmission medium 61 into the sliding of the force-applying member 31 or the transmission rod 622 in the horizontal direction.

[0102] In some embodiments, the first sliding part 42, the second sliding part 43, and the counterweight 41 can be manufactured independently and then fixedly connected. Alternatively, the first sliding part 42, the second sliding part 43, and the counterweight 41 can be integrally formed.

[0103] The structure of the first limiting member 9 is not limited. For example, in one embodiment, please refer to... Figures 1 to 5 The drainage device includes a limiting box 20 with a cavity. The bottom of the limiting box 20 has two through holes communicating with the cavity. A counterweight 41 is slidably housed in the cavity. A first sliding part 42 and a second sliding part 43 are slidably inserted through the two through holes. The two ends of a first elastic member 5 are respectively connected to the top surface of the cavity and the top surface of the counterweight 41. The top surface and bottom surface of the cavity are the first limiting members 9.

[0104] In one embodiment, please refer to Figures 1 to 5 The drainage device includes a second elastic element 7, which contacts the force-applying element 31 or the transmission assembly 6.

[0105] When the refrigerant connecting pipe 11 is in the closed state, the counterweight 4, the transmission assembly 6 and the force application component 31 drive the second elastic component 7 to undergo elastic deformation.

[0106] When the refrigerant connecting pipe 11 is in the conductive state, the elastic force of the second elastic element 7 drives the counterweight 4, the transmission assembly 6 and the force-applying element 31 to move.

[0107] In this way, the elastic force of the second elastic element 7 can quickly and reliably drive the force-applying element 31, the transmission component 6 and the counterweight 4 to reset, resulting in a simple structure and high reliability.

[0108] Here, as the counterweight 4, transmission assembly 6 and force-applying component 31 move under the action of refrigerant pressure, the force-applying component 31 or transmission assembly 6 will also apply a force to the second elastic component 7, causing the second elastic component 7 to undergo elastic deformation.

[0109] The second elastic element 7 includes, but is not limited to, structures capable of elastic deformation such as tension springs or compression springs.

[0110] The manner in which the second elastic element 7 contacts the force-applying element 31 is not limited. For example, in one embodiment, please refer to... Figures 3 to 5 The second elastic element 7 can abut or connect with the force-applying element 31. For example, the second elastic element 7 can be located on the side of the force-applying element 31 away from the transmission medium 61. The second elastic element 7 can be a compression spring. One end of the second elastic element 7 can be connected to or abut with the force-applying element 31, and the other end of the second elastic element 7 can be connected to the transmission tube 63.

[0111] The manner in which the second elastic element 7 contacts the transmission assembly 6 is not limited. For example, in one embodiment, please refer to... Figures 1 to 3 The second elastic element 7 can abut or connect with the transmission rod 622. For example, the second elastic element 7 can be disposed on the side of the transmission rod 622 away from the transmission medium 61. The second elastic element 7 can be a compression spring. One end of the second elastic element 7 can be connected to or abut with the transmission rod 622, and the other end of the second elastic element 7 can be connected to the second limiting element 10.

[0112] In one embodiment, please refer to Figures 3 to 5 The drainage device includes two third limiting members 30, located on either side of the sliding direction of the force-applying member 31. The two third limiting members 30 limit the sliding stroke of the force-applying member 31. The third limiting members 30 block the force-applying member 31 to limit its sliding stroke. For example, when the force-applying member 31 slides to its maximum distance in the horizontal direction, it is blocked by the third limiting members 30, thus preventing the force-applying member 31 from sliding a predetermined distance.

[0113] As an example, in one embodiment, please refer to Figures 3 to 5 The third limiting member 30 can be formed on the inner peripheral wall of the transmission tube 63.

[0114] In one embodiment, please refer to Figures 1 to 5 The piping assembly 1 includes a bypass pipe 13, which connects to the portion of the refrigerant connecting pipe 11 located between the counterweight 4 and the first switch 21. At least a portion of the refrigerant in the refrigerant connecting pipe 11 can flow out unidirectionally through the bypass pipe 13. When the first switch 21 closes the refrigerant connecting pipe 11, at least a portion of the refrigerant in the refrigerant connecting pipe 11 can flow out unidirectionally through the bypass pipe 13, thereby reducing the refrigerant pressure in the refrigerant connecting pipe 11. This changes the resultant force of the refrigerant pressure and gravity acting on the counterweight 4, causing the counterweight 4 to move, for example, by sliding in the vertical direction.

[0115] The refrigerant in the bypass pipe 13 can flow out to other structures or be discharged to the outside. In some embodiments, the bypass pipe 13 can be used to connect the refrigerant connecting pipe 11 and the refrigerant pipe of the heat pump system. In this way, the refrigerant in the bypass pipe 13 can flow back into the refrigerant pipe, realizing the recycling of the refrigerant.

[0116] It is understandable that the bypass pipe 13 can be directly connected to the refrigerant pipe. For heat pump systems using ground water and water supply, the bypass pipe 13 can also be connected to the refrigerant pipe through the main refrigerant pipe of the heat pump host. For heat pump systems using ground refrigerant and water supply, the bypass pipe 13 can also be connected to the refrigerant pipe through the hydraulic refrigerant pipe.

[0117] For example, regardless of whether the drain pipe 12 is in a conducting or closed state, as long as the refrigerant connecting pipe 11 is in a closed state, the refrigerant pressure exerted by the refrigerant in the refrigerant connecting pipe 11 on the counterweight 4 will decrease, and the second elastic element 7 will restore its elastic deformation to generate elastic force, thereby driving the counterweight 4, the transmission assembly 6, and the force-applying element 31 to move. During the movement, at least a portion of the refrigerant in the refrigerant connecting pipe 11 flows back to the refrigerant pipeline of the heat pump system through the bypass pipe 13 under the compression of the counterweight 4, and the counterweight 4, the transmission assembly 6, and the force-applying element 31 reset.

[0118] In one embodiment, please refer to Figures 1 to 4 The bypass pipe 13 includes a capillary tube 131, which is connected to the portion of the refrigerant connecting pipe 11 located between the counterweight 4 and the first switch 21. At least a portion of the refrigerant in the refrigerant connecting pipe 11 can flow out through the capillary tube 131.

[0119] In one embodiment, please refer to Figure 5 The bypass pipe 13 includes a bypass connecting pipe 132 and a one-way valve 133 disposed on the bypass connecting pipe 132. The bypass connecting pipe 132 is connected to the portion of the refrigerant connecting pipe 11 located between the counterweight 4 and the first switch 21. At least a portion of the refrigerant in the refrigerant connecting pipe 11 can flow out through the bypass connecting pipe 132. The one-way valve 133 can control the unidirectional flow of refrigerant in the bypass connecting pipe 132.

[0120] As an example, in one embodiment, please refer to Figures 1 to 5The opening / closing element 32 can block the flow section of the drain pipe 12 to stop the drain pipe 12, and it can also avoid the flow section of the drain pipe 12 to allow the drain pipe 12 to flow. In other words, the opening / closing element 32 has a blocking position and a flowing position. The magnetic force between the force-applying element 31 and the opening / closing element 32 can drive the opening / closing element 32 to slide between the blocking and flowing positions. When the opening / closing element 32 slides to the blocking position, it blocks the flow section of the drain pipe 12, and the drain pipe 12 is stopped by the opening / closing element 32. When the opening / closing element 32 slides to the flowing position, it avoids the flow section of the drain pipe 12, and the drain pipe 12 is in a flowing state. The opening / closing element 32 achieves drainage or non-drainage by blocking or avoiding the water flow path in the drain pipe 12, making the operation simple and efficient.

[0121] A flow cross section refers to a cross section that is orthogonal to all streamlines of the primary flow or the total flow, that is, a surface perpendicular to the flow velocity cluster, such as the water flow in the drain pipe 12.

[0122] In other words, both the energized closing switch and the opening / closing element 32 are used to connect or disconnect the drain pipe 12. Simultaneously, the drainage device has a drainage state and a non-drainage state. In the drainage state, the opening / closing element 32 is in the conducting position and the energized closing switch is in the de-energized state. In the non-drainage state, the energized closing switch is in the energized state; or, the opening / closing element 32 is in the blocking position; or, the energized closing switch is in the energized state while the opening / closing element 32 is in the blocking position.

[0123] In one embodiment, please refer to Figure 2 and Figure 4 The circumferential wall of the drain pipe 12 has an installation port 12a, through which the opening and closing element 32 extends into the drain pipe 12. For example, the opening and closing element 32 has a strip-shaped structure and is slidably and sealingly inserted into the installation port 12a. When the opening and closing element 32 is not inserted into the installation port 12a, i.e., when the opening and closing element 32 is in the conducting position, the drain pipe 12 is in a conducting state. When the opening and closing element 32 extends into the drain pipe 12 through the installation port 12a, i.e., when the opening and closing element 32 is in the blocking position, the opening and closing element 32 can block the flow section of the drain pipe 12.

[0124] In one embodiment, please refer to Figures 1 to 5The drainage device includes a guide cavity 8 communicating with the installation port 12a. The guide cavity 8 intersects with and communicates with the drain pipe 12, and the opening and closing element 32 slides along the guide cavity 8. Specifically, the opening and closing element 32 is slidably housed in the guide cavity 8. When the opening and closing element 32 is in the blocking position, one end of the opening and closing element 32 extends from the guide cavity 8 into the drain pipe 12 in the sliding direction to block the flow section of the drain pipe 12, and the water flow in the drain pipe 12 is stopped by the opening and closing element 32. When the opening and closing element 32 is in the conducting position, the opening and closing element 32 retracts into the guide cavity 8 in the sliding direction to avoid and conduct the flow section of the drain pipe 12, and the water flow in the drain pipe 12 can flow normally at the opening and closing element 32.

[0125] The guide cavity 8 serves to guide the sliding of the opening and closing element 32, ensuring that the opening and closing element 32 can slide smoothly between the blocking position and the conducting position, avoiding the sliding jamming of the opening and closing element 32, and improving the reliability of the sliding of the opening and closing element 32.

[0126] The guide cavity 8 intersects and is connected to the drain pipe 12. This means that the extension direction of the guide cavity 8 is not parallel to the extension direction of the drain pipe 12. They can be perpendicular to each other or oblique to each other, as long as the guide cavity 8 can be connected to the installation port 12a.

[0127] In one embodiment, please refer to Figures 1 to 5 The opening / closing element 32 slides vertically to block or avoid the flow section of the drain pipe 12. In other words, at least a portion of the drain pipe 12 extends horizontally, and the mounting port 12a is formed in the horizontally extending portion of the drain pipe 12.

[0128] In one embodiment, please refer to Figure 1 and Figure 2 The guide cavity 8 extends downward from the mounting port 12a, with its upper end communicating with the mounting port 12a and its lower end closed. The opening / closing element 32 is slidably disposed within the guide cavity 8, and an air hole 8a is formed in the lower part of the guide cavity 8. Exemplarily, the force-applying element 31 is located above the opening / closing element 32. The force-applying element 31 can rotate or slide to a working position to generate a magnetic force (e.g., magnetic attraction) with the opening / closing element 32, driving the opening / closing element 32 to slide upward to the sealing position. The force-applying element 31 can rotate or slide away from the working position, and the opening / closing element 32 slides downward to the conducting position under gravity. Here, the opening / closing element 32 is equivalent to a piston, and it makes a sealing sliding contact with the cavity wall of the guide cavity 8 to prevent water leakage.

[0129] It should be noted that in some embodiments, the force-applying member 31 may also be located below the opening and closing member 32. The force-applying member 31 may be rotated or slid to the working position to generate a magnetic force (e.g., magnetic repulsion) with the opening and closing member 32, driving the opening and closing member 32 to slide upward to the blocking position.

[0130] The vent 8a is used to balance the air pressure in the guide cavity 8, preventing the opening and closing member 32 from having difficulty sliding. For example, the vent 8a is located on the bottom wall of the guide cavity 8.

[0131] It is understandable that when the opening and closing member 32 slides down to the lowest point, the space between the opening and closing member 32 and the drain pipe 12 will not be connected with the air hole 8a. In this way, the water in the drain pipe 12 will not flow out through the air hole 8a.

[0132] In one embodiment, please refer to Figures 3 to 5 The guide cavity 8 extends upward from the mounting port 12a, and its lower end communicates with the mounting port 12a. The opening and closing element 32 is slidably disposed within the guide cavity 8 in a sealing manner. Exemplarily, the force-applying element 31 can rotate or slide to a working position to generate a magnetic force (e.g., magnetic attraction) with the opening and closing element 32, driving the opening and closing element 32 to slide upward to the conducting position. The force-applying element 31 can rotate or slide away from the working position, and the opening and closing element 32 slides downward to the sealing position under the action of gravity. Here, the opening and closing element 32 is equivalent to a piston, and it makes sealing sliding contact with the cavity wall of the guide cavity 8 to prevent water leakage.

[0133] In one embodiment, please refer to Figures 1 to 5 The drain pipe 12 has a stepped surface 12b on the part opposite the mounting port 12a. The opening / closing member 32 can abut against the stepped surface 12b to limit the sliding stroke. For example, the opening / closing member 32 abuts against the stepped surface 12b when it is slid to the blocking position. This ensures that the sliding member slides a set distance.

[0134] As an example, in one embodiment, please refer to Figures 3 to 5 The drainage device includes a third elastic element 40 that contacts the opening / closing element 32. The third elastic element 40 is a compression spring disposed in the guide cavity 8. One end of the third elastic element 40 abuts against or connects to the stepped surface 12b, and the other end of the third elastic element 40 abuts against the upper end of the opening / closing element 32. When it is necessary to open the drainage pipe 12, the force-applying element 31 slides to the working position. The magnetic attraction force generated between the force-applying element 31 and the opening / closing element 32 causes the third elastic element 40 to undergo elastic deformation and drives the opening / closing element 32 to slide upward from the blocking position to the opening position. When the force-applying element 31 slides to a position away from the working position, the elastic force generated by the elastic deformation of the third elastic element 40 pushes the opening / closing element 32 downward from the opening position to the blocking position.

[0135] In one embodiment, at least one of the first switch 21 and the second switch 22 can be adjusted to remain closed. Exemplarily, the drainage device can be configured for manual drainage mode, in which at least one of the first switch 21 and the second switch 22 can be adjusted to remain closed. That is, at least one of the first switch 21 and the second switch 22 can be kept in a normally closed state, and the first switch 21 and / or the second switch 22, which are kept in the normally closed state, can only be opened manually. For example, a control circuit can be used to adjust the temperature memory switch and / or the energized closing switch to remain closed. This means that in the event of a power outage, regardless of whether the temperature is low or high, the drainage device will not automatically drain water; drainage can only be initiated by manually opening the corresponding switch. In some scenarios, such as when a heat pump system needs maintenance, the drainage device can be switched to manual drainage mode, thereby improving the user-friendliness of the drainage device.

[0136] The following two specific embodiments illustrate in detail the drainage device provided in this application:

[0137] First embodiment:

[0138] Please see Figure 1 and Figure 2 The temperature memory switch is located on the refrigerant connecting pipe 11, and the energized closing switch is located on the drain pipe 12. When the temperature is not higher than the set temperature, the temperature memory switch is closed, and it remains closed even in the event of a sudden power outage. When the temperature is higher than the set temperature, the temperature memory switch is open, and it remains open even in the event of a sudden power outage. When power is supplied, the energized closing switch closes. When power is lost, the energized closing switch automatically opens.

[0139] A counterweight 4 is provided at the end of the refrigerant connecting pipe 11. Both the refrigerant connecting pipe 11 and the transmission pipe 63 are located below the counterweight 41. The first sliding part 42 is slidably and sealed in the refrigerant connecting pipe 11. The refrigerant in the refrigerant connecting pipe 11 can lift the counterweight 4. A first elastic element 5 is provided on the top of the counterweight 4. The first elastic element 5 applies a downward force to the counterweight 4.

[0140] The opening and closing element 32 is slidably inserted into the drain pipe 12. The gear 621 is fixedly connected to the force-applying element 31 to drive the force-applying element 31 to rotate. The transmission medium 61 is located between the second sliding part 43 and the transmission rod 622.

[0141] When the product is powered on, regardless of the outside temperature, the refrigerant connecting pipe 11 is closed by the energized closing switch. The water in the drain pipe 12 is cut off, and the water will not be discharged regardless of whether the temperature memory switch is activated.

[0142] In the instant before the product is powered off, when the outside temperature is higher than the set temperature, the temperature memory switch in the refrigerant connecting pipe 11 opens. After the power is off, the temperature memory switch remains open. At this time, the counterweight 4 is always lifted by the refrigerant pressure, and the counterweight 4 abuts against the first limiting member 9 located on the upper side. At this time, the counterweight 4 does not push the rack to slide through the transmission medium 61 in the transmission pipe 63. The rack is limited by the second elastic member 7. At this time, the force-applying member 31 is in the working position. The end faces of the force-applying member 31 and the opening and closing member 32 have opposite polarities. The force-applying member 31 and the opening and closing member 32 generate a magnetic attraction force. The opening and closing member 32 blocks the flow section of the drain pipe 12 and abuts against the step surface 12b. After the product is powered off, although the energized closing switch in the drain pipe 12 is in the open state after the power is off, the drain pipe 12 is cut off by the opening and closing member 32. Therefore, the water in the drain pipe 12 still cannot be discharged, and the drainage device is in a non-draining state.

[0143] In the instant before the product is powered off, when the outside temperature is not higher than the set temperature, the temperature memory switch in the refrigerant connecting pipe 11 is closed. At this time, the refrigerant pressure in the refrigerant connecting pipe 11 decreases, which reduces the thrust of the refrigerant on the counterweight 4. The counterweight 4 slides down and abuts against the first limiting member 9 located on the lower side. During the downward sliding process of the counterweight 4, the counterweight 4 pushes the transmission medium 61 in the transmission pipe 63 to move towards the rack side. The transmission medium 61 in the transmission pipe 63 pushes the rack to slide, and the rack drives the gear 621 to rotate. The rack can abut against the second limiting member 10. The rack stops sliding, and the force-applying member 31 fixed on the gear 621 is flipped. The end faces of the force-applying member 31 and the opening and closing member 32 have the same polarity. Due to the repulsion of like poles, a magnetic repulsion force is generated between the force-applying member 31 and the opening and closing member 32. The force-applying member 31 pushes the opening and closing member 32 to slide down along the guide cavity 8 to the conduction position. At this time, when the product is powered off, the energizing switch in the drain pipe 12 is opened, the water in the drain pipe 12 can be discharged, and the drain device is in the draining state.

[0144] It is understood that, as a variation of the first embodiment described above, the energized closing switch can also be installed on the refrigerant connecting pipe 11, and the temperature memory switch can be installed on the drain pipe 12. Other structures are the same as in the first embodiment. Accordingly, the temperature memory switch can be opened when the temperature is not higher than the set temperature, and can be closed when the temperature is higher than the set temperature.

[0145] Second embodiment:

[0146] Please see Figure 3 and Figure 4The temperature memory switch is located on the refrigerant connecting pipe 11, and the energized closing switch is located on the drain pipe 12. When power is applied, the energized closing switch closes; when power is cut off, the energized closing switch automatically opens. When the temperature is higher than the set temperature, the temperature memory switch opens and remains open even in the event of a sudden power outage. When the temperature is not higher than the set temperature, the temperature memory switch closes and remains closed even in the event of a sudden power outage.

[0147] A counterweight 4 is provided at the end of the refrigerant connecting pipe 11. Both the refrigerant connecting pipe 11 and the transmission pipe 63 are located below the counterweight 41. The first sliding part 42 is slidably and sealed in the refrigerant connecting pipe 11. The refrigerant in the refrigerant connecting pipe 11 can lift the counterweight 4. A first elastic element 5 is provided on the top of the counterweight 4. The first elastic element 5 applies a downward force to the counterweight 4.

[0148] The opening / closing element 32 is slidably inserted into the drain pipe 12, and the force-applying element 31 is slidably disposed in the transmission pipe 63. The transmission medium 61 is located between the second sliding part 43 and the force-applying element 31. The force-applying element 31 is located above the opening / closing element 32.

[0149] In the instant before the product is powered off, when the outside temperature is higher than the set temperature, the temperature memory switch in the refrigerant connecting pipe 11 opens. At this time, the refrigerant pressure in the refrigerant connecting pipe 11 drives the counterweight 4 to slide upward, and the counterweight 4 abuts against the first limiting member 9 located on the upper side. At this time, the counterweight 4 does not push the force-applying member 31 to slide through the transmission medium 61 in the transmission pipe 63. The force-applying member 31 is kept off-center from its working position by the second elastic member 7. Because the distance between the force-applying member 31 and the opening / closing member 32 is relatively large, the magnetic force between the force-applying member 31 and the opening / closing member 32 is weak or even non-existent. The opening / closing member 32 is kept in the blocking position by the third elastic member 40 and abuts against the step surface 12b. When the product is powered off, the energized closing switch in the drain pipe 12 opens. At this time, water from the water circuit enters the drain pipe 12, but because it is blocked by the opening / closing member 32, the water from the water circuit cannot be discharged through the drain pipe 12.

[0150] In the instant before the product is powered off, when the ambient temperature is not higher than the set temperature, the temperature memory switch in the refrigerant connecting pipe 11 closes, the refrigerant pressure in the refrigerant connecting pipe 11 decreases, and the counterweight 4 slides downward to the first limiting member 9 located on the lower side under the combined force of gravity and the first elastic member 5. At the same time, the counterweight 4 pushes the force-applying member 31 to slide to the working position through the transmission medium 61, and the magnetic attraction between the force-applying member 31 and the opening and closing member 32 causes the opening and closing member 32 to slide upward to the conducting position. When the product is powered off, the energizing switch of the drain pipe 12 opens, and the water in the water circuit can be discharged through the drain pipe 12, and the draining device is in the draining state.

[0151] It is understood that the specific settings of the temperature memory switch can be made according to the requirements. Those skilled in the art can reasonably obtain other settings of the temperature memory switch based on the specific embodiments disclosed in this application, which will not be described in detail here.

[0152] The various embodiments / implementations provided in this application can be combined with each other without creating contradictions. The above descriptions are merely preferred embodiments of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A drainage device, characterized in that, include: Piping components, including refrigerant connection pipes and drain pipes; The switching assembly includes a first switch disposed on the refrigerant connecting pipe and a second switch disposed on the drain pipe, wherein one of the first switch and the second switch is an energized closing switch and the other of the first switch and the second switch is a temperature memory switch; A magnetic component includes a force-applying component and an opening / closing component that are magnetically coupled to each other. The opening / closing component is slidably disposed in the drain pipe to open or close the drain pipe. The counterweight, driven by gravity and refrigerant from the refrigerant connecting pipe, moves, which in turn moves the force-applying component to drive the opening / closing component to slide.

2. The drainage device according to claim 1, characterized in that, The counterweight slides in the up-down direction.

3. The drainage device according to claim 2, characterized in that, The drainage device includes a first elastic element that contacts the counterweight, and the first elastic element applies a downward force to the counterweight.

4. The drainage device according to claim 1, characterized in that, The drainage device includes a transmission assembly that connects the counterweight and the force-applying component.

5. The drainage device according to claim 4, characterized in that, The transmission assembly includes a transmission medium; The transmission medium is located between the counterweight and the force-applying component, and the force of the counterweight is transmitted to the force-applying component through the transmission medium, or... The transmission assembly includes a reversing structure connected to the force-applying member. The transmission medium is located between the counterweight and the reversing structure, and the force of the counterweight is transmitted to the reversing structure through the transmission medium.

6. The drainage device according to claim 5, characterized in that, The reversing structure includes a gear and a transmission rod. The gear is connected to the force-applying component and meshes with the transmission rod. The transmission medium is located between the counterweight and the transmission rod. The force of the counterweight is transmitted to the transmission rod through the transmission medium to push the transmission rod to slide.

7. The drainage device according to claim 6, characterized in that, The force-applying component is constructed as a strip structure, and at least one end of the force-applying component along its length generates a magnetic force with the opening and closing component.

8. The drainage device according to claim 5, characterized in that, The transmission assembly includes a transmission tube, and the transmission medium is housed in the transmission tube.

9. The drainage device according to claim 8, characterized in that, The counterweight includes a counterweight body, a first sliding part, and a second sliding part. The first sliding part and the second sliding part are both disposed on the same side of the counterweight body. The first sliding part is slidably inserted into the refrigerant connecting pipe, and the second sliding part is slidably inserted into the transmission pipe.

10. The drainage device according to claim 4, characterized in that, The drainage device includes a second elastic element that contacts the force-applying element or the transmission assembly. When the refrigerant connecting pipe is in the closed state, the counterweight, the transmission assembly, and the force-applying component drive the second elastic element to undergo elastic deformation. When the refrigerant connecting pipe is in a conductive state, the elastic force of the second elastic element drives the counterweight, the transmission assembly, and the force-applying element to move.

11. The drainage device according to claim 1, characterized in that, The piping assembly includes a bypass pipe connected to the refrigerant connecting pipe at the location between the counterweight and the first switch, wherein at least a portion of the refrigerant in the refrigerant connecting pipe can flow out unidirectionally through the bypass pipe.

12. The drainage device according to claim 11, characterized in that, The bypass conduit includes a capillary tube connected to the portion of the refrigerant connecting pipe located between the counterweight and the first switch; and / or, The bypass pipeline includes a bypass connecting pipe and a one-way valve disposed on the bypass connecting pipe. The bypass connecting pipe is connected to the portion of the refrigerant connecting pipe located between the counterweight and the first switch.

13. The drainage device according to any one of claims 1 to 12, characterized in that, At least one of the force-applying component and the opening / closing component is a permanent magnet.

14. The drainage device according to any one of claims 1 to 12, characterized in that, The opening and closing element can block the flow section of the drain pipe to stop the drain pipe, and the opening and closing element can avoid the flow section of the drain pipe to allow the drain pipe to flow.

15. The drainage device according to claim 14, characterized in that, The circumferential wall of the drain pipe has an installation opening, through which the opening / closing element extends into the drain pipe.

16. The drainage device according to claim 15, characterized in that, The drainage device includes a guide cavity communicating with the mounting port, the guide cavity intersecting and communicating with the drain pipe, and the opening and closing member sliding along the guide cavity.

17. The drainage device according to claim 16, characterized in that, The guide cavity extends downward from the mounting port, the upper end of the guide cavity is connected to the mounting port, the lower end of the guide cavity is closed, the opening and closing element is slidably disposed in the guide cavity in a sealed manner, and an air hole is formed in the lower part of the guide cavity.

18. The drainage device according to claim 16, characterized in that, The guide cavity extends upward from the mounting port, and the lower end of the guide cavity communicates with the mounting port. The opening and closing element is slidably disposed in the guide cavity in a sealing manner.

19. The drainage device according to any one of claims 1 to 12, characterized in that, At least one of the first switch and the second switch can be adjusted to remain in the closed state.

20. A heat pump system, characterized in that, It includes a refrigerant pipeline, a water circuit, and a drainage device as described in any one of claims 1 to 19, wherein the refrigerant connecting pipe is connected to the refrigerant pipeline, and the water circuit is connected to the drainage pipe.

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