CN114791184A

CN114791184A - Throttling device, air conditioner and method for vacuumizing and filling refrigerant into air conditioner

Info

Publication number: CN114791184A
Application number: CN202210259643.2A
Authority: CN
Inventors: 吕福俊; 宋龙; 吕科磊
Original assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Priority date: 2022-03-16
Filing date: 2022-03-16
Publication date: 2022-07-26

Abstract

The invention relates to the technical field of air conditioning equipment, and provides a throttling device, an air conditioner and a method for vacuumizing and filling a refrigerant into the air conditioner, wherein the throttling device comprises a pipe body, a valve core and a driving module, a channel for circulating the refrigerant is formed in the pipe body, one end in the channel is provided with a free limiting port, the other end of the channel is provided with a throttling limiting port, and one end of the pipe body, which is provided with the free limiting port, is used for being communicated with a condenser; the valve core is movably arranged in a channel between the throttling limit port and the free limit port, a throttling hole is formed in the valve core, and the valve core has a throttling state moving to the throttling limit port and a free state separating from the throttling limit port; the drive module is switchable between a first state defining the spool in a free state and a second state releasing the definition of the spool state. The throttling device can limit the valve core to be in a free state through the driving module, and is convenient for simply and quickly vacuumizing the air conditioner and filling the air conditioner with the refrigerant.

Description

Throttling device, air conditioner and method for vacuumizing and filling refrigerant into air conditioner

Technical Field

The invention relates to the technical field of air conditioning equipment, in particular to a throttling device, an air conditioner and a method for vacuumizing and filling a refrigerant into the air conditioner.

Background

The vacuum pumping is an important process in the production, performance test, installation and maintenance processes of the air conditioning equipment, and the specific method is that a vacuum pump is connected with a pipeline of the air conditioning equipment to remove non-condensable gas, water and the like in the air conditioning equipment. In the manufacturing process of the outdoor unit of the air conditioner, all parts of the outdoor unit also need to be vacuumized before filling the refrigerant, so that the heat exchange effect is prevented from being influenced and even potential safety hazards are avoided due to air mixing.

Currently, because the short pipe throttling device has lower cost compared with the capillary throttling device, more and more air conditioners use the short pipe throttling device to replace the capillary throttling device. However, the valve core is arranged in the throttling short pipe, the valve core can move up and down in the throttling short pipe, and the valve core is attracted upwards in the process of vacuumizing the air conditioner, so that the position of the valve core is in a state that the throttling short pipe is throttled. The inner diameter of the throttling sleeve in a throttling state is very small, the vacuumizing effect of the air conditioner is affected, and the problems of insufficient vacuum degree and the like are easily caused.

Disclosure of Invention

The invention provides a throttling device, an air conditioner and a method for vacuumizing and filling a refrigerant into the air conditioner, which are used for solving the defects that the inner diameter of a throttling short pipe in a throttling state is very small, the vacuumizing effect of the air conditioner is influenced, and the insufficient vacuum degree is easily caused in the prior art, and realizing the throttling device and the air conditioner which are convenient to vacuumize and fill the refrigerant into the air conditioner simply and quickly.

The invention provides a throttling device, comprising:

the condenser comprises a pipe body, a condenser and a condenser, wherein a channel for refrigerant circulation is formed inside the pipe body, one end in the channel is provided with a free limiting port, the other end of the channel is provided with a throttling limiting port, and one end of the pipe body, which is provided with the free limiting port, is communicated with the condenser;

the valve core is movably arranged in the channel between the throttling limit port and the free limit port, a throttling hole is formed in the valve core, and the valve core has a throttling state moving to the throttling limit port and a free state separating from the throttling limit port;

a driving module capable of switching between a first state and a second state; in the first state, the drive module defines the spool in the free state; in the second state, the drive module de-qualifies the spool state.

According to the throttling device provided by the invention, in the first state, the driving module drives the valve core to move to the free limit port.

According to the throttling device provided by the invention, the valve core can be driven by magnetic force;

the drive module is switchable between a state in which the magnetic force is applied to the spool and a state in which the magnetic force is released from being applied to the spool.

According to the throttling device provided by the invention, at least part of the valve core is made of ferromagnetic material.

According to the throttling device provided by the invention, the driving module comprises a permanent magnet, and the permanent magnet can be switched between a state of being close to the pipe body and a state of being far away from the pipe body.

According to the throttling device provided by the invention, the driving module comprises an electromagnet, and the electromagnet can be switched between a power-on state and a power-off state.

According to the throttling device provided by the invention, the driving module is detachably arranged outside the pipe body and is close to the free limiting port.

The invention also provides an air conditioner which comprises the throttling device.

The invention also provides a method for vacuumizing and filling the refrigerant into the air conditioner, which comprises the following steps:

determining that a driving module of the throttling device is in a first state so as to limit a valve core of the throttling device to be in a free state, and vacuumizing an air conditioner;

after the air conditioner is vacuumized, filling a refrigerant into the air conditioner;

and after the refrigerant is determined to be filled completely, the switching driving module is in a second state so as to remove the limitation on the state of the valve core.

According to the method for vacuumizing and filling the refrigerant in the air conditioner, which is provided by the invention, the step that the valve core of the limiting throttling device is in a free state comprises the following steps: the driving valve core moves to the free limit port of the tube body.

According to the throttling device provided by the invention, the driving module is arranged, and the driving module is used for driving the valve core in the pipe body, so that the valve core is in a free state, the flow area in the pipe body is increased, the vacuumizing efficiency of the air conditioner is effectively improved, the subsequent filling of a refrigerant into the air conditioner is greatly facilitated, after the refrigerant filling is completed, the driving module can remove the limitation on the state of the valve core, the subsequent use of the throttling device is not influenced, and the defects that the inner diameter of a throttling short pipe in a throttling state is very small, the vacuumizing effect of the air conditioner is influenced and the vacuum degree is easy to be insufficient in the prior art are overcome; moreover, by using the throttling device, the pipe body does not need to be subjected to destructive processing when the air conditioner is vacuumized, the damage to the pipe body structure is avoided, the service life of the throttling device is prolonged, the throttling device is simple and convenient to use, and the cost is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is a front view of a throttle device provided by an embodiment of the present invention;

fig. 2 is a sectional view taken along line a-a in fig. 1.

Reference numerals are as follows:

1: a tube body; 2: a valve core; 3: a throttling limit port; 4: a free limit port; 5: an orifice.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The throttling device of the present invention is described below with reference to fig. 1-2.

As shown in fig. 1 and 2, the throttling device provided by the invention comprises a pipe body 1, a valve core 2 and a driving module. A channel for refrigerant circulation is formed in the tube body 1, one end in the channel is provided with a free limiting port 4, the other end of the channel is provided with a throttling limiting port 3, and one end of the tube body 1, which is provided with a free limiting port 4 pair, is used for being communicated with a condenser; the valve core 2 is movably arranged in a channel between the throttling limit port 3 and the free limit port 4, a throttling hole 5 is formed in the valve core 2, and the valve core 2 has a throttling state moving to the throttling limit port 3 and a free state separating from the throttling limit port 3; the drive module can be switched between a first state, in which it defines the spool 2 in a free state, and a second state, in which it de-defines the state of the spool 2.

The throttling device of the embodiment is a pipeline structure used for communicating a condenser of an air conditioner, a channel used for the circulation of a refrigerant is formed in the pipe body 1, the valve core 2 is arranged in the channel, the valve core 2 can move in the channel of the pipe body 1 (such as the movement in the vertical direction in fig. 2) along with the flow of the refrigerant in the pipe body 1 in the normal use state of the air conditioner, the throttling hole 5 formed in the valve core 2 is a through hole which penetrates through the valve core 2 along the axial direction, and the aperture of the throttling hole 5 is smaller than the inner diameter of the channel. Meanwhile, a throttling limit port 3 and a free limit port 4 are arranged in the channel, the throttling limit port 3 is used for being matched with the valve core 2 to block the channel when the refrigerant flows out of the condenser so that the refrigerant only flows in the throttling hole 5 when passing through the valve core 2, and the free limit port 4 is used for being matched with the valve core 2 to open the channel so that the refrigerant flows in the throttling hole 5 and the channel when passing through the valve core 2 when the refrigerant flows into the condenser. When the valve core 2 moves to the throttling limit port 3 along with the flowing of the refrigerant, the end part of the valve core 2 is inserted into the throttling limit port 3, the outer side of the valve core 2 is tightly attached to the inner wall of the throttling limit port 3, and the refrigerant can only flow through the valve core 2 through the throttling hole 5 (the valve core 2 is in a throttling state), so that a good throttling effect is generated. When the valve element 2 moves to the free restriction port 4 following the flow of the refrigerant, the other end of the valve element 2 abuts on the free restriction port 4, and a gap is left between the free restriction port 4 and the end of the valve element 2, so that the refrigerant can flow through the valve element 2 through the gap and the orifice 5 (the valve element 2 is in a free state). The specific structures of the valve core 2, the free limit port 4 and the throttle limit port 3 are various, and are not limited to the structures described in the above text, and can be applied to the present invention as long as the above throttling principle can be satisfied.

When the drive module of this embodiment is in first state, drive module drive valve core 2 makes case 2 be in free state, and the area of circulation in the body 1 increases this moment, and body 1 has good mobility, can not influence the flow of air or refrigerant in body 1, improves the efficiency to the air conditioner evacuation, also the follow-up refrigerant of annotating in the convenient to the air conditioner of very big degree. When the driving module is in the second state, the limitation on the state of the valve core 2 is removed, the driving module does not influence the movement of the valve core 2 any more, the valve core 2 can freely move along with the flow of the refrigerant in the pipe body 1, and any adverse effect on the subsequent normal use of the throttling device cannot be caused.

According to the throttling device provided by the invention, the driving module is arranged, the driving module is used for driving the valve core 2 in the pipe body 1, so that the valve core 2 is in a free state, the flow area in the pipe body 1 is increased, the vacuumizing efficiency of the air conditioner is effectively improved, the subsequent filling of a refrigerant into the air conditioner is greatly facilitated, after the filling of the refrigerant is completed, the driving module can remove the limitation on the state of the valve core 2, the subsequent use of the throttling device is not influenced, and the defects that the throttling short pipe in the prior art is small in inner diameter in the throttling state, the vacuumizing effect of the air conditioner is influenced and the vacuum degree is easy to be insufficient are overcome. Moreover, by using the throttling device, the pipe body 1 does not need to be subjected to destructive processing when the air conditioner is vacuumized, the damage to the structure of the pipe body 1 is avoided, the service life of the throttling device is prolonged, the throttling device is simple and convenient to use, and the cost is reduced.

In one embodiment, the driving module only acts on the tube body 1 during the production process, and the driving module can be repeatedly reused, so that the use cost is very low.

Specifically, in the first state, the drive module drives the spool 2 to move to the free restriction port 4. In the present embodiment, the driving module drives the valve core 2 to move to the free limit port 4 in the first state, and the valve core 2 is in the free state at this time. The free state referred to in the present invention includes a state in which the spool 2 is in the free restriction port 4, and also includes a state in which the spool 2 is in the passage between the restriction port 3 and the free restriction port 4. Compared with the state that the valve core 2 is positioned in a channel between the throttling limit port 3 and the free limit port 4, when the valve core 2 is driven by the driving module to move to the free limit port 4, the valve core 2 can be stably limited at the position of the free limit port 4, the stability of the valve core 2 in the vacuumizing process is better, the valve core is not easy to separate from the free state, and the vacuumizing effect of the air conditioner is ensured.

In one embodiment, the spool 2 can be magnetically driven; the drive module is capable of switching between a state in which the magnetic force is applied to the spool 2 and a state in which the magnetic force applied to the spool 2 is released.

In the present embodiment, the valve element 2 in the throttle device is a structure that can be driven by a magnetic force, and the drive module can switch between a state in which the magnetic force is applied to the valve element 2 and a state in which the magnetic force is released from being applied to the valve element 2. When the driving module applies magnetic force to the valve core 2, that is, without contacting the valve core 2, the driving module drives the valve core 2 to move so that the valve core 2 is in a free state, that is, the state where the driving module applies magnetic force to the valve core 2 is the first state of the driving module. When the driving module releases the magnetic force applied to the valve core 2, the valve core 2 is no longer influenced by the driving module, and the subsequent use of the valve core 2 is not influenced, namely, the state that the driving module releases the magnetic force applied to the valve core 2 is the second state of the driving module. The driving module controls the valve core 2 in a way of applying and releasing the applied magnetic force to the valve core 2, a complex mechanical structure is not required to be arranged to adjust the state of the valve core 2, the valve core 2 can be effectively controlled under the condition of not contacting the valve core 2, the operation method is extremely simple, the manufacturing and using cost is greatly reduced, and the practicability is high.

Specifically, the valve core 2 is at least partially made of ferromagnetic material. In order to enable the valve core 2 to be driven by magnetic force, at least part of the valve core 2 of the present embodiment is made of ferromagnetic material capable of being influenced by magnetic force, and the valve core 2 may be made of part of ferromagnetic material or all of ferromagnetic material. The ferromagnetic material may be steel or its alloy or other materials capable of being influenced by magnetic force and capable of being made into the valve element 2, for example, the valve element 2 is entirely made of iron; in addition, the valve core 2 of iron compares in current copper valve core, and use cost reduces by a wide margin, and the quality of iron valve core 2 is bigger moreover, and the cost is cheaper, has good abrasion resistance simultaneously, and life has obtained increasing by a wide margin.

In one embodiment, the drive module comprises a permanent magnet that can be switched between a state of being close to the tube 1 and a state of being far from the tube 1. The permanent magnet is a structure capable of generating a magnetic field to act on the valve element 2 to affect the valve element 2. The permanent magnet is moved to a position close to the valve core 2, the permanent magnet generates a magnetic field to act on the valve core 2, and the valve core 2 is under the action of the magnetic force of the permanent magnet, so that the valve core 2 can be controlled. The position of the valve core 2 can be adjusted by moving the permanent magnet, and the valve core 2 can be limited to be in a required position after the permanent magnet is fixed, namely the first state of the drive module; after the permanent magnet is removed, the limitation on the valve core 2 can be released, namely the second state of the drive module, and the operation control method is very simple. The permanent magnet has the advantages of extremely low use cost, easily obtained materials and repeated utilization. In factory production, a set of permanent magnet structure is configured, and the control requirements of all the valve cores 2 can be met.

In another embodiment, the drive means comprises an electromagnet which is switchable between an energized state and a de-energized state. When the electromagnet is electrified, the electromagnet generates a magnetic field, the magnetic field acts on the valve core 2 to generate acting force on the valve core 2, the position of the electromagnet is fixed, the valve core 2 can be limited to be in a desired position, subsequent operation is facilitated, and the valve core is in the first state of the driving module. After the subsequent operation is finished, the influence of the electromagnet on the valve core 2 can be eliminated in a power-off mode, the valve core 2 is not limited any more, can freely move in the channel, the subsequent use of the valve core 2 is not influenced, and the valve core 2 is in the second state of the driving module at the moment. Meanwhile, the control of the valve core 2 can be released in a mode that the electromagnet is out of the range influencing the valve core 2 by moving away the electromagnet. The electromagnet belongs to a conventional structure, is cheap and easy to obtain, is easy to operate, has adjustable magnetic force, can be correspondingly adjusted aiming at different valve cores 2, and has wide application range.

In one embodiment, the drive module is removably mounted outside the tubular body 1, near the free confinement port 4 of the tubular body 1. When the valve core 2 needs to be limited, the driving module can be installed on the pipe body 1, and the valve core 2 is influenced by the driving module to be in a limited state, so that the valve core 2 is driven to be in a free state. When the influence on the valve core 2 needs to be removed, the driving module can be directly detached from the pipe body 1 and is far away from the valve core 2, the influence on the valve core 2 is avoided, and the limitation on the valve core 2 is removed. The drive module detachably of this embodiment installs in the outside of body 1, can not cause any damage to body 1 structure, avoids influencing the follow-up use of body 1, and the mode of injecing and removing the injecing is very simple, facilitates the use, is fit for popularizing and applying.

The invention further provides an air conditioner which comprises the throttling device provided by the embodiment. The air conditioner of the embodiment is provided with the throttling device, when the air conditioner is produced, the air conditioner needs to be vacuumized and filled with the refrigerant, the valve core 2 can be controlled by utilizing the driving module of the throttling device, the valve core 2 of the throttling device is ensured to be in a free state, and the throttling device is in a condition of the largest overflowing area, so that the air conditioner is conveniently and efficiently vacuumized and filled with the refrigerant, and the production efficiency of the air conditioner is greatly improved; after the refrigerant is filled, the driving module removes the limitation on the state of the valve core 2, and the normal use of a subsequent air conditioner is not influenced.

step 1, determining that a driving module of a throttling device is in a first state to limit a valve core 2 of the throttling device to be in a free state, and vacuumizing an air conditioner;

specifically, confirm that drive module is in the control promptly and prescribe a limit to the suitable position of case 2, drive module produces limited action to case 2, drive case 2 and make case 2 be in free state, body 1 in the throttling arrangement of air conditioner has the biggest overflow area this moment, for the evacuation of air conditioner with fill the refrigerant and provide good basis, overflow area is big more, the evacuation efficiency is high more, reach the vacuum degree of settlement more easily (<8Pa), and the refrigerant flows through throttling arrangement's body 1 the velocity of flow is high more, the refrigerant fills and annotates efficiency and is promoted by a wide margin.

Step 2, after the air conditioner is determined to be vacuumized, filling a refrigerant into the air conditioner;

specifically, after the vacuum degree on the air conditioner pipeline is detected to meet the set requirement, the refrigerant can be filled into the air conditioner, at the moment, the valve core 2 in the pipe body 1 of the throttling device is in a free state, the throttling effect on the flowing of the refrigerant in the pipe body 1 cannot be generated, and the filling efficiency is greatly improved;

step 3, after the refrigerant is determined to be filled completely, the switching driving module is in a second state so as to remove the limitation on the state of the valve core 2;

specifically, when detecting that the refrigerant fills and annotates the completion after, switch over drive module to the second state, drive module has removed the limiting action to case 2 promptly, the motion of case 2 in body 1 no longer receives drive module's limited influence, the refrigerant of air conditioner fills the work and annotates and has accomplished this moment, case 2 has also nearly recovered to normal user state, follow-up in the normal use of air conditioner, case 2 can follow the flow of refrigerant and freely move in the passageway between spacing port 3 of throttle and the spacing port 4 of freedom, realize good throttle or the effect of intercommunication.

In a further embodiment, the valve spool 2 defining the throttle device in a free state comprises: the driving spool 2 moves to the free restriction port 4 of the tubular body 1. Drive valve core 2 through drive module and remove to free limit port 4 department, valve core 2 receives the dual limiting displacement of free limit port 4 and drive module, and valve core 2's stability is better, avoids valve core 2 to move in disorder in the passageway, avoids influencing the evacuation and fills the filling refrigerant effect.

In one embodiment, the driving module is a device capable of generating magnetic force to define and de-define the valve element 2, and the valve element 2 includes a part of ferromagnetic material, or is made of a completely ferromagnetic material, or is a completely iron structure, and the driving module is detachably mounted on the outer side of the pipe body 1, and when the driving module is mounted on the outer side of the pipe body 1, the driving module is in a first state, and when the driving module is detached from the pipe body 1, the driving module is in a second state. The method for vacuumizing and filling the refrigerant of the air conditioner comprises the following steps of:

step 10, determining that a driving module of the throttling device is in a first state to limit a valve core 2 of the throttling device to be in a free state, and vacuumizing an air conditioner;

specifically, the driving module is installed outside the pipe body 1, the driving module may be close to the outside of the pipe body 1, or may be fixed on the pipe body 1 through a buckle or a supporting structure, the driving module is close to the position of the free limit port 4 in the pipe body 1 or is located below the free limit port 4, the driving module generates a magnetic field to act on the valve element 2, the valve element 2 is driven and limited under the action of magnetic force, the valve element 2 is located at the position of the free limit port 4 and is fixed, the valve element 2 is located in a free state, and the air conditioner starts to be vacuumized;

step 20, after the air conditioner is determined to be vacuumized, filling a refrigerant into the air conditioner;

step 30, after the refrigerant is determined to be filled completely, the switching drive module is in a second state so as to remove the limitation on the state of the valve core 2;

specifically, fill the completion back at the refrigerant completely, demolish drive module from body 1, remove drive module to the position that can't disturb case 2, drive module is in the second state promptly, and the removal of case 2 in body 1 no longer receives drive module's restriction, can follow the flow of refrigerant and freely remove, does not influence subsequent normal use completely.

In a further embodiment, the used driving module includes a permanent magnet, and the valve core 2 is controlled by the permanent magnet, and the method for vacuumizing and filling the refrigerant in the air conditioner of the embodiment includes the following steps:

step 100, determining that a driving module of the throttling device is in a first state to limit a valve core 2 of the throttling device to be in a free state, and vacuumizing an air conditioner;

specifically, a permanent magnet is arranged on the outer side of a pipe body 1, the permanent magnet is close to a free limiting port 4 in the pipe body 1 or is located at a position below the free limiting port 4, the permanent magnet generates a magnetic field to act on a valve core 2, the valve core 2 of the embodiment comprises a part of ferromagnetic material parts, or the valve core 2 of the embodiment is a complete ferromagnetic material part, or the valve core 2 of the embodiment is an iron material part, the valve core 2 can be driven and limited under the action of magnetic force, and the permanent magnet adsorbs the valve core 2 to enable the valve core 2 to be located at the position of the free limiting port 4 and fixed, namely the valve core 2 is located in a free state, so that the air conditioner starts to be vacuumized;

step 200, after the air conditioner is determined to be vacuumized, filling a refrigerant into the air conditioner;

specifically, after the vacuum degree on the air conditioner pipeline is detected to meet the set requirement, the refrigerant can be filled into the air conditioner, at the moment, the valve core 2 in the pipe body 1 of the throttling device is in a free state, the flow of the refrigerant in the pipe body 1 cannot be throttled, and the filling efficiency is greatly improved;

step 300, after the refrigerant is determined to be filled completely, the switching driving module is in a second state so as to remove the limitation on the state of the valve core 2;

specifically, fill the completion back at the refrigerant completely, remove the permanent magnet from body 1, remove the permanent magnet to the position that can't disturb case 2, the permanent magnet is in the second state promptly, and the removal of case 2 in body 1 no longer receives the restriction of permanent magnet, can follow the flow of refrigerant and freely remove, does not influence subsequent normal use completely.

In another embodiment, the driving module includes an electromagnet, and the valve element 2 is controlled by the electromagnet, and the method for evacuating and filling the air conditioner of the embodiment includes the following steps:

step 101, determining that a driving module of a throttling device is in a first state to limit a valve core 2 of the throttling device to be in a free state, and vacuumizing an air conditioner;

specifically, the electromagnet is arranged on the outer side of the pipe body 1, the electromagnet is close to the position of the free limit port 4 in the pipe body 1 or is positioned below the position of the free limit port 4, the electromagnet is electrified to generate a magnetic field to act on the valve core 2, the valve core 2 of the embodiment comprises a part of ferromagnetic material part, or the valve core 2 of the embodiment is a complete ferromagnetic material part, or the valve core 2 of the embodiment is an iron material part, the valve core 2 can be driven and limited under the action of magnetic force, the electromagnet adsorbs the valve core 2, so that the valve core 2 is positioned at the position of the free limit port 4 and is fixed, the valve core 2 is in a free state, and the air conditioner can be vacuumized;

step 201, after the air conditioner is determined to be vacuumized, filling a refrigerant into the air conditioner;

step 301, after the refrigerant is determined to be filled completely, the switching drive module is in a second state to release the limitation on the state of the valve core 2;

it is specific, fill totally at the refrigerant and annotate the completion after, with the electro-magnet outage, the magnetic field that the electro-magnet produced disappears, the electro-magnet no longer produces magnetic field and uses on case 2, then removes the electro-magnet, conveniently carries out the evacuation of next air conditioner and fills the refrigerant, has accomplished in the air conditioner that the refrigerant filled, and the removal of case 2 in body 1 no longer receives the restriction of permanent magnet, can follow the flow of refrigerant and freely remove, does not influence subsequent normal use completely.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A flow restriction device, characterized by: the method comprises the following steps:

the refrigerant circulation device comprises a pipe body, a condenser and a compressor, wherein a channel for refrigerant circulation is formed in the pipe body, one end in the channel is provided with a free limiting port, the other end of the channel is provided with a throttling limiting port, and one end of the pipe body, which is provided with the free limiting port, is communicated with the condenser;

a driving module capable of switching between a first state and a second state; in the first state, the drive module defines the spool in the free state; in the second state, the drive module de-restricts the spool state.

2. The throttle device of claim 1, wherein: in the first state, the drive module drives the valve core to move to the free limit port.

3. The throttle device according to claim 2, characterized in that: the valve core can be driven by magnetic force;

4. A flow restriction device according to claim 3, characterized in that: at least part of the valve core is made of ferromagnetic material.

5. A throttle device according to claim 3, characterized in that: the driving module comprises a permanent magnet, and the permanent magnet can be switched between a state of being close to the pipe body and a state of being far away from the pipe body.

6. A flow restriction device according to claim 3, characterized in that: the drive module comprises an electromagnet which can be switched between a power-on state and a power-off state.

7. A flow restriction device according to claim 3, characterized in that: the driving module is detachably mounted on the outer side of the pipe body and close to the free limiting port.

8. An air conditioner, characterized in that: the air conditioner comprises the throttling device according to any one of claims 1 to 7.

9. A method for vacuumizing and filling refrigerant of an air conditioner is characterized by comprising the following steps: the method comprises the following steps:

determining that a driving module of the throttling device is in a first state to limit a valve core of the throttling device to be in a free state, and vacuumizing an air conditioner;

10. The method of claim 9, wherein the method further comprises: the valve core of the restriction throttling device is in a free state and comprises: the driving valve core moves to the free limit port of the tube body.