CN112797677B

CN112797677B - Device and method for selecting capillary tube for refrigeration system

Info

Publication number: CN112797677B
Application number: CN202110103782.1A
Authority: CN
Inventors: 董勇志; 王军
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: 2021-01-26
Filing date: 2021-01-26
Publication date: 2023-08-15
Anticipated expiration: 2041-01-26
Also published as: CN112797677A

Abstract

The invention discloses a device and a method for selecting a capillary tube for a refrigeration system, wherein the device comprises the following components: a housing having a cavity formed therein, on which an inlet end, an outlet end and a plurality of capillary branches are formed; and the gating piece is at least partially positioned in the cavity and is used for selecting one or more capillary branches to be communicated with the inlet end and the outlet end. The method comprises the following steps: the input end and the output end in the device are respectively connected with a refrigerating system; all capillary branches are communicated with the inlet end and the outlet end, and a refrigerating system comprising the device is vacuumized and injected with a refrigerant; selecting the capillary branch to be communicated with the inlet end and the outlet end by using a gating piece, and obtaining a set target parameter value; and determining the specification of the capillary branch corresponding to the set target parameter value meeting the set requirement as the specification of the selected capillary. The invention can solve the problems of complicated operation, time and labor waste, low efficiency and high cost in the prior art.

Description

Device and method for selecting capillary tube for refrigeration system

Technical Field

The invention belongs to the technical field of refrigeration systems, in particular relates to a capillary tube technology for a refrigeration system, and more particularly relates to a device and a method for selecting a capillary tube for the refrigeration system.

Background

The capillary tube is a common throttling component in the refrigerating system, and the purpose of throttling is to reduce the pressure of the refrigerant in the refrigerating system, reduce the flow rate of the refrigerant, form high-low pressure difference at the two ends of the capillary tube, and absorb heat by reducing the pressure of the refrigerant, so as to achieve the purpose of absorbing air heat.

Capillaries of different specifications (length/inner diameter) affect the overall energy efficiency of the refrigeration system equipment by affecting the extended pressure drop. In order to ensure the whole energy efficiency, the capillary tube for the refrigerating system needs to be repeatedly debugged. In the prior art, at the development stage of a refrigeration system, a rough capillary specification is determined by a calculation method; and then, the energy efficiency of the refrigeration equipment is regulated by finely regulating the capillary specification in a laboratory until the required energy efficiency is reached, and the capillary specification which reaches the required energy efficiency is used as a capillary for the final refrigeration equipment. When the specification of the capillary tube is finely adjusted in a laboratory, the stop valves are welded at the two ends of the capillary tube, and the capillary tube is welded on the stop valves. Every time the capillary tube is replaced, the stop valve is required to be closed, the capillary tube is welded again, the refrigerant is refilled, and then the stop valve is opened for debugging.

The capillary tube is selected by the method, the operation is complex, time and labor are wasted, the efficiency is low, the cost is high, the starting time of the product is increased, and the development resources are wasted.

Disclosure of Invention

The invention aims to provide a device and a method for selecting a capillary tube for a refrigerating system, which solve the problems of complicated operation, time and labor waste, low efficiency and high cost in the prior art.

In order to achieve the above object, the present invention provides a device for selecting a capillary tube for a refrigeration system, which is implemented by adopting the following technical scheme:

an apparatus for selecting a capillary tube for a refrigeration system, comprising:

a housing having a cavity formed therein, an inlet end, an outlet end and a plurality of capillary branches formed thereon;

and the gating piece is at least partially positioned in the cavity and is used for selecting one or more capillary branches to be communicated with the inlet end and the outlet end.

In one preferred embodiment, the gating member comprises:

the through channels are distributed on the gating piece along the moving direction of the gating piece;

the gating piece moves in the cavity, and one or more paths of capillary branches are selected to be communicated with the inlet end and the outlet end through the through channels according to different moving distances of the gating piece in the cavity.

In one preferred embodiment, the apparatus further comprises:

a housing positioning portion formed on an inner wall of the housing;

and the gating piece positioning part is formed on the gating piece and matched with the shell positioning part to realize the positioning of the gating piece in the cavity.

In one preferred embodiment, the housing locating portion is a groove and the gate locating portion is a ball protruding from the gate body.

In one preferred embodiment, the balls are spring balls.

In one preferred embodiment, the gating member is formed with a handle for pushing and pulling the gating member, and an operating portion of the handle is located outside the cavity.

In one of the preferred embodiments, an identification presenting the capillary branches in communication is also formed on the handle.

In order to achieve the above object, the method for selecting the capillary tube for the refrigeration system provided by the invention is realized by adopting the following technical scheme:

a method of selecting a capillary tube for a refrigeration system using the apparatus for selecting a capillary tube for a refrigeration system described above, comprising:

the inlet end and the outlet end of the device are respectively connected with a refrigerant pipeline of a refrigerating system;

controlling a gating element in the device, so that all capillary branches in the device are communicated with the inlet end and the outlet end, vacuumizing a refrigerating system comprising the device and injecting a refrigerant;

operating a refrigerating system, and selecting different capillary branches to be communicated with the inlet end and the outlet end by using a gating piece to obtain different set target parameter values when the capillary branches are communicated with the inlet end and the outlet end;

and determining that the specifications of all capillary branches communicated with the inlet end and the outlet end corresponding to the set target parameter value meeting the set requirement are set as the specification of the selected capillary.

In one preferred embodiment, the method further comprises:

after the refrigerant is injected into the refrigeration system including the device, the gating member is controlled so that a portion of the capillary tube branches communicate with the inlet end and the outlet end, and then the refrigeration system is operated.

In one preferred embodiment, the method further comprises:

estimating the specification of the required capillary and comparing it to the specifications of the capillaries in all capillary branches in the device;

if the specification of the required capillary tube is larger than the specification of the capillary tubes in all capillary tube branches in the device, connecting an adjusting capillary tube at the inlet end of the device or the outlet end of the device, and connecting the adjusting capillary tube and the device together with the refrigerant pipeline; the specification of the tuning capillary is determined according to the specification of the desired capillary and the specifications of the capillaries in all capillary branches in the device.

Compared with the prior art, the invention has the advantages and positive effects that:

the invention provides a device and a method for selecting a capillary tube for a refrigerating system, wherein an inlet end, an outlet end and multiple paths of capillary tube branches are formed on a shell, a gating piece is formed in a cavity formed by the shell, and one path or multiple paths of capillary tube branches can be selected to be communicated with the inlet end and the outlet end by using the gating piece; when the inlet end and the outlet end of the shell are connected into the refrigerating system, the capillary tube branches communicated with the inlet end and the outlet end of the shell are actual capillary tubes connected into the refrigerating system, and the capillary tube branches not communicated with the inlet end and the outlet end are not connected into the refrigerating system; therefore, the capillaries in different paths are selected for communication through the gating piece, so that different capillaries can be connected into the refrigeration system, and further, different capillaries are used for operation test, and proper capillary specifications meeting the set parameter targets of the refrigeration system are obtained; when the device and the method provided by the invention are applied, when the accessed capillaries with different specifications are changed in the refrigerating system, only the gating piece is required to be operated, the complex operation processes of operating the stop valve, welding the capillaries, filling the refrigerant and the like are not required, the capillary specification selection adjustment in an online mode is realized, the operation is convenient and fast, the time and the labor are saved, the operation efficiency is high, and the operation cost for selecting the capillaries is reduced.

Other features and advantages of the present invention will become apparent upon review of the detailed description of the invention in conjunction with the drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of one embodiment of an apparatus for selecting a capillary tube for a refrigeration system according to the present invention;

FIG. 2 is a schematic view of another embodiment of the apparatus for selecting a capillary tube for a refrigeration system of the present invention;

FIG. 3 is a schematic view of the embodiment of FIG. 2 in a first state;

FIG. 4 is a schematic diagram of the embodiment of FIG. 2 in a second state;

fig. 5 is a flow chart of one embodiment of a method of selecting a capillary tube for a refrigeration system in accordance with the present invention.

In the above figures, the reference numerals and their corresponding component names are as follows:

10. a housing;

101. an inlet end; 102. an outlet end;

111. a first capillary branch; 1111. an inlet end; 1112. an outlet end; 112. a second capillary branch; 113. a third capillary branch; 114. a fourth capillary branch; 115. a fifth capillary branch;

12. a gating member; 121. a through passage;

20. a housing;

201. an inlet end; 202. an outlet end; 203. a housing positioning portion;

211. a first capillary branch; 212. a second capillary branch; 213. a third capillary branch; 214. a fourth capillary branch; 215. a fifth capillary branch;

22. a gating member;

221. a first through passage; 222. a second through passage; 223. a third through passage; 224. a third through passage; 225. a fifth through passage; 226. a sixth through passage; 227. a gate positioning section; 228. a handle; 2281. an operation section.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and examples.

It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," "third," "fourth," "fifth," "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or an implicit indication of the number of technical features indicated. Thus, a feature defining "first", "second", "third", "fourth", "fifth", "sixth" may include at least one such feature, either explicitly or implicitly. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the term "connected" is to be construed broadly, and for example, may be a mechanical connection or an electrical connection; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present invention.

The invention provides a device for selecting capillary tubes and a method for selecting capillary tubes by using the device, aiming at solving the problems of complicated operation, low efficiency and the like in the prior art for determining the specification of the capillary tubes for a refrigerating system.

Fig. 1 is a schematic diagram of an embodiment of the apparatus for selecting a capillary tube for a refrigeration system according to the present invention.

As shown in fig. 1, the device of this embodiment includes a housing 10, and a cavity is formed inside the housing 10. An inlet end 101 and an outlet end 102 are formed on the housing 10. The inlet 101 and outlet 102 are defined with respect to the flow direction of the refrigerant when the device is used in a refrigeration system. When the device is connected to a refrigeration system, the inlet 101 will be connected to the condenser outlet and the outlet 102 will be connected to the evaporator inlet. The inlet end 101 and the outlet end 102 may be openings formed in the housing and communicating with the internal cavity of the housing 10, or may be a length of piping communicating with the internal cavity of the housing 10.

Five capillary branches, namely, a first capillary branch 111, a second capillary branch 112, a third capillary branch 113, a fourth capillary branch 114, and a fifth capillary branch 115, are also formed in the housing 10. The five capillary branches are communicated with the internal cavity of the shell 10 and are sequentially arranged on the shell 10. In other embodiments, the number of capillary branches is not limited to five, but may be other multiple paths, so long as the number is not less than two, which falls within the protection scope of the present invention. In this embodiment, the capillaries in each capillary branch have equal inner diameters, and are not all equal in length or are not all equal in length.

The apparatus of this embodiment further includes a gate 12 at least partially within the cavity of the housing 10 for selecting one or more capillary branches to communicate with the inlet 101 and the outlet 102. The strobe member 12 is positioned within the cavity of the housing 10 at least in part for strobe one or more capillary tubes so that when part of the structure of the strobe member 12 is sealed within the cavity to avoid refrigerant leakage, communication with the inlet 101 and outlet 102 can still be achieved by strobe member 12 selecting one or more capillary tube branches.

As described above, when the apparatus is applied to a refrigeration system, the inlet end 101 and the outlet end 102 are connected to the refrigerant flow path. Then, capillary legs that are in communication with the inlet 101 and outlet 102 will also be connected to the refrigerant flow path, while capillary legs that are not in communication with the inlet 101 and outlet 102 will not be connected to the refrigerant flow path. Thus, the selection of the actual capillary tube that is connected into the refrigerant flow path is accomplished by the gating of the capillary tube branch or not by the gating member 12.

Further, referring to fig. 1, in this embodiment, each capillary branch also includes an inlet end and an outlet end, each of which communicates with the cavity of the housing 10. Taking the first capillary branch 111 as an example, in fig. 1, the right side of the housing 10 is an inlet 1111 of the first capillary branch 111 at a position opposite to the inlet 101 of the housing 10, and the left side of the housing 10 is an outlet 1112 of the first capillary branch 111 above the inlet 101 of the housing 10. The inlet and outlet ends of the remaining capillary branches are also arranged in sequence in such a manner that the right side of the housing 10 is the inlet end, the left side is the outlet end, and the outlet end is located above the inlet end.

The strobe 12 has a plurality of through passages 121 formed therein, and the plurality of through passages are arranged in order in the up-down direction. The inner diameter of each through passage 121 corresponds to the inner diameter of the capillary branch. The capillary branch may communicate with the inlet 101 and outlet 102 ends of the housing 10 through a through passage 121.

Specifically, in the position of the strobe member 12 shown in fig. 1, the inlet end 101 of the housing communicates with the inlet end 1111 of the first capillary branch 111 through one through passage, while the outlet end 1112 of the first capillary branch 111 communicates with the inlet end of the second capillary branch 112 through another through passage, the outlet end of the second capillary branch 112 communicates with the inlet end of the third capillary branch 113 through another through passage, and the outlet end of the third capillary branch 113 communicates with the outlet end 102 of the housing 10 through the uppermost through passage. Thus, the selectively accessed capillary branches are first capillary branch 111, second capillary branch 112, and third capillary branch 113, while fourth capillary branch 114 and fifth capillary branch 115 are not accessed. Then, when the inner diameters of the capillary branches are equal, the inner diameter of the actual capillary tube connected to the refrigeration system is equal to the inner diameter of each capillary branch, and the length is the sum of the lengths of the first capillary branch 111, the second capillary branch 112 and the third capillary branch 113.

The position of the gating member 12 in the cavity is changed, and the position of the through channel is changed, so that the capillary branch connected with the inlet end 101 and the outlet end 102 of the shell 10 through the through channel can be changed, that is, the length of an actual capillary in the refrigeration system is changed, and the capillary with different specifications is connected in the refrigeration system.

In other embodiments, the inner diameters of the capillaries in each capillary branch may also be completely unequal or not. Then, the capillary branches with different inner diameters are selected to be connected with the inlet end and the outlet end of the shell through the through channels, so that the capillary branches with different inner diameters are connected into the pipeline. When the specification of the capillary branch which is actually connected is calculated, unification can be carried out according to the conversion relation of the inner diameter and the length, and the length and the inner diameter of the capillary which is actually connected can be determined.

By adopting the device for selecting the capillary tube for the refrigerating system, an inlet end, an outlet end and multiple paths of capillary tube branches are formed on the shell, a gating piece is formed in a cavity formed by the shell, and one or multiple paths of capillary tube branches can be selected to be communicated with the inlet end and the outlet end by using the gating piece. When the inlet end and the outlet end of the shell are connected into the refrigerating system, the capillary tube branches communicated with the inlet end and the outlet end of the shell are actual capillary tubes connected into the refrigerating system, and the capillary tube branches not communicated with the inlet end and the outlet end are not connected into the refrigerating system. Therefore, the capillaries in different paths are selected for communication through the gating piece, so that different capillaries can be connected into the refrigeration system, and further, different capillaries are utilized for operation test, and proper capillary specifications meeting the set parameter targets of the refrigeration system are obtained. When the device of the embodiment is applied to the realization of changing the accessed capillaries with different specifications in a refrigerating system, only the gating piece is required to be operated, the complex operation processes of operating the stop valve, welding the capillaries, filling the refrigerant and the like are not required, the capillary specification selection adjustment of an online mode is realized, the operation is convenient and fast, the time and the labor are saved, the operation efficiency is high, and the operation cost for selecting the capillaries is reduced.

Fig. 2 to 4 show another embodiment of the device for selecting a capillary tube for a refrigeration system according to the present invention, wherein fig. 2 is a schematic structural view of the embodiment, and fig. 3 and 4 are schematic structural views of the embodiment in two different states, respectively.

As shown in fig. 2 to 4, the apparatus of this embodiment includes a housing 20, and a cavity is formed inside the housing 20. An inlet end 201 and an outlet end 202 are formed on the housing 20. The inlet 201 and outlet 202 are defined with respect to the flow direction of the refrigerant when the device is used in a refrigeration system. When the device is connected to a refrigeration system, the inlet 201 will be connected to the condenser outlet and the outlet 202 will be connected to the evaporator inlet. The inlet end 201 and the outlet end 202 are each a length of tubing that communicates with the interior cavity of the housing 20 to facilitate connection with other tubing when used in a refrigeration system.

Five capillary branches, namely, a first capillary branch 211, a second capillary branch 212, a third capillary branch 213, a fourth capillary branch 214, and a fifth capillary branch 215, are also formed on the housing 20. The five capillary branches are in communication with the interior cavity of the housing 20 and are arranged in sequence on the housing 20. The inner diameters of the capillaries in the five capillary branches are equal, and the lengths of the capillaries are unequal. Each capillary branch also includes an inlet end and an outlet end, which are in communication with the cavity of the housing 20, respectively.

The device of this embodiment further comprises a strobe 22, the strobe 22 comprising a strobe body and a handle 228, wherein the strobe body is entirely located within the cavity of the housing 20 and seals against both ends of the cavity to avoid leakage of refrigerant. The handle 228 is operated to enable the strobe 22 to move within the cavity in the axial direction of the handle 228.

Six through channels are formed in the strobe body, and are arranged and dispersed in sequence from one end close to the handle 228 to one end far from the handle 228, and the arrangement direction is also the moving direction of the strobe 22 in the cavity. The six through passages are a first through passage 221, a second through passage 222, a third through passage 223, a fourth through passage 224, a fifth through passage 225, and a sixth through passage 226, respectively, from one end close to the handle 228 to one end far from the handle 228. Further, the sixth through passage 226 serves as a through passage near the outlet end 202 of the housing 20, and its tip end is in communication with the outlet end 202. Moreover, the outlet 202 is capable of following movement with the movement of the strobe 22. And, the outlet end 202 remains with a portion of the tube section exposed to the housing 20 as the strobe 22 is moved to the outermost end as shown in FIG. 4.

A case positioning portion 203 is formed on the inner wall of the case 20, and a gate positioning portion 227 is formed on the gate 22, and the case positioning portion 203 cooperates with the gate positioning portion 227 to position the gate 22 in the cavity. Because of the five capillary branches, to achieve multi-position positioning of the strobe 22, the housing positioning portion 203 and the strobe positioning portion 227 each include at least 5 positioning members.

Specifically, in this embodiment, the housing positioning portion 203 includes at least 5 grooves, and the gate positioning portion 227 includes at least 5 sets of balls. The ball is embedded into the groove to realize positioning. As a preferred embodiment, the balls are spring balls, and when the handle 228 is pushed, the spring balls and the grooves are matched to have a bump feeling, so that the moving distance of the gating member 22 is conveniently controlled, and the accuracy of selecting the communicated capillary branch is further improved.

For convenience of operation, an operation portion 2281 at an end of the handle 228 is located outside the cavity, and the operation portion 2281 is in the shape of an oval sphere for convenience of holding.

A mark (not shown) for presenting the capillary branch to which the strobe member 22 communicates is also formed on the handle 228 at the rear end of the operation portion 2281. As one embodiment, the marks are graduation marks and graduation values, and the graduation values correspond to the communicated capillary branches. By reading the scale values exposed outside the housing 20, it is possible to know which capillary branch or branches are currently connected.

The process of selecting capillary tube for refrigerating system by using the device is as follows:

fig. 3 is a schematic diagram showing a configuration in which all five capillary branches are connected to the inlet 101 and the outlet 102 of the housing 20. In this state, the handle is pushed inward to the extreme position and positioned. The first through channel 221 communicates with the inlet end 201 and the inlet end of the first capillary branch 211, and the second through channel 222 communicates with the outlet end of the first capillary branch 211 and the inlet end of the second capillary branch 212; the third through passage 223 communicates the outlet end of the second capillary branch 212 with the inlet end of the third capillary branch 213; the fourth through passage 224 communicates the outlet end of the third capillary branch 213 with the inlet end of the fourth capillary branch 214; the fifth through channel 225 communicates the outlet end of the fourth capillary branch 214 with the inlet end of the fifth capillary branch 215; the sixth through passage 226 communicates the outlet end of the fifth capillary branch 215 with the outlet end 202 of the housing 20. In this state, when the apparatus is applied to a refrigeration system, the inlet end 201 and the outlet end 202 are connected to a refrigerant flow path. Then, the five capillary branches connected to the inlet end 201 and the outlet end 202 are also connected to the refrigerant flow path.

Fig. 4 is a schematic view showing a configuration in which only the first capillary branch 211 is connected to the inlet 101 and the outlet 102 of the housing 20. In this state, the handle is moved inward a short distance and positioned. The fifth through channel 225 communicates with the inlet end 201 and the inlet end of the first capillary branch 211, and the sixth through channel 226 communicates with the outlet end of the first capillary branch 211 and the outlet end 202 of the housing 20, the remaining capillary branches not being communicated. In this state, when the apparatus is applied to a refrigeration system, the inlet end 201 and the outlet end 202 are connected to a refrigerant flow path. Then, the first capillary branch 211 communicating with the inlet end 201 and the outlet end 202 is connected to the refrigerant flow path, and none of the other capillary branches is connected to the refrigerant flow path.

The push-pull of the handle 228 is controlled by the operation part 2281, so that the change of the moving distance of the strobe main body forming the through channel in the cavity is changed, the position of the through channel is changed, and then the capillary branch connected with the inlet end 201 and the outlet end 202 of the shell 20 through the through channel can be changed, namely the specification of an actual capillary in the refrigeration system is changed, and the capillary with different specifications is connected in the refrigeration system.

Fig. 5 shows a flow chart of an embodiment of a method of selecting a capillary tube for a refrigeration system according to the present invention, and in particular, a method of selecting a capillary tube using the apparatus for selecting a capillary tube for a refrigerant system shown in the embodiment of fig. 1 or fig. 2 or other preferred embodiments.

For ease of description, this embodiment employs the following method to select a capillary tube for a refrigeration system in connection with the apparatus shown in fig. 2 to 4.

Step 51: the inlet end and the outlet end of the device are respectively connected with a refrigerant pipeline of a refrigerating system.

The inlet end is connected with the outlet of the condenser, in particular to a pipeline connected with the outlet of the condenser; the outlet end is connected to the evaporator inlet, in particular to a pipe line to which the evaporator inlet is connected.

Step 52: and controlling a gating element in the device, so that all capillary branches in the device are communicated with an inlet end and an outlet end, vacuumizing a refrigerating system comprising the device and injecting a refrigerant.

In the state of fig. 3, all five capillary branches in the device are communicated with the inlet end and the outlet end, so that all the capillary branches in the device are connected to the refrigerating system.

Step 53: and operating the refrigerating system, and selecting different capillary branches to be communicated with the inlet end and the outlet end by using the gating piece to obtain set target parameter values when the different capillary branches are communicated with the inlet end and the outlet end.

In refrigeration systems, it is common to determine the capillary tube of the desired specification by setting whether the target parameter value meets the requirements. The set target parameters include, but are not limited to, refrigerant outlet line throttling temperature and refrigerant outlet line throttling pressure.

When the refrigerating system operates, different capillary branches are selected to be communicated with the inlet end and the outlet end by using the gating piece in the device, so that the different capillary branches are connected into the refrigerating agent circulation pipeline. After each time the capillary branch is selected and stably operated, a set target parameter value in the current state of accessing the capillary branch is obtained, and the obtained set target parameter value is compared with a set required value. If the set requirement value is not met, the position of the gating piece is changed, specifically, the distance of the gating piece in the cavity can be moved through the handle, so that different capillary branches can be selected to be connected into a circulating pipeline of the refrigerant system.

Step 54: and determining the specification of all capillary branches communicated with the inlet end and the outlet end corresponding to the set target parameter value meeting the set requirement as the specification of the selected capillary.

The set target parameter value meets the set requirement, which means that the capillary specification in the state meets the set requirement, and the energy efficiency of the system requirement can be achieved. The specification of all the capillary branches communicated with the inlet end and the outlet end corresponding to the moment is positioned and selected to obtain the capillary specification.

After the specification of the selected capillary tube is determined, the device is removed from the refrigeration system, the capillary tube with the same specification is selected according to the specification of the selected capillary tube and welded into the refrigeration system, and the selection of the capillary tube for the refrigeration system is completed.

By adopting the method, in combination with a specific device for selecting the capillary tube for the refrigeration system, when the capillary tube with different specifications is connected in the refrigeration system after the device is welded into the refrigeration system once and vacuumized and injected with the refrigerant once is executed, only the gating piece is required to be operated, and the complex operation processes of a stop valve, welding the capillary tube, filling the refrigerant and the like are not required to be operated; moreover, when the gating piece is operated, the refrigerating system does not need to be stopped, so that the capillary specification selection adjustment in an online mode is realized, the operation is convenient and fast, the time and the labor are saved, the operation efficiency is high, and the cost of selecting the capillary is greatly reduced.

In other embodiments, to increase the speed at which the strobe selects the accessed capillary branch, after the refrigerant is injected into the refrigeration system, including the device, the strobe is controlled so that a portion of the capillary branch communicates with the inlet and outlet ends, and then the refrigeration system is operated. For example, the gate is controlled such that half of the capillary branches communicate. Then, after the refrigerating system is operated, on the basis of half capillary branch communication, the debugging for reducing the capillary branch or increasing the capillary branch can be performed, and the selection speed can be improved.

In other preferred embodiments, the specifications of all capillary branches in the device may not meet the debug requirements, and to ensure that the selection of capillaries is performed smoothly with the device, the following method is used to perform the selection of capillaries:

the specifications of the required capillaries are first estimated and compared with the specifications of the capillaries in all capillary branches in the device. The method of estimating the capillary specification is implemented using prior art techniques.

If the specification of the required capillary tube is larger than the specifications of the capillary tubes in all capillary tube branches in the device, a section of adjusting capillary tube is connected at the inlet end or the outlet end of the device, and the adjusting capillary tube is connected with the refrigerant pipeline together with the device.

The specification of the adjusting capillary is determined according to the specification of the required capillary and the specifications of the capillaries in all capillary branches in the device, so that the specification of the required capillary can be achieved after the specification of the adjusting capillary and the specifications of the capillaries in all capillary branches in the device are ensured. As a more preferred embodiment, the capillary specification is adjusted to the estimated desired capillary specification minus half of the specification of all capillary branches in the device.

The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims

1. An apparatus for selecting a capillary tube for a refrigeration system, the apparatus comprising:

a housing having a cavity formed therein, an inlet end, an outlet end and a plurality of capillary branches formed thereon; each path of capillary branch comprises a capillary branch inlet end and a capillary branch outlet end which are respectively communicated with the cavity, and a plurality of paths of capillary branches are sequentially arranged on the shell;

2. The apparatus for selecting a capillary tube for a refrigeration system according to claim 1, wherein said gate member comprises:

3. The apparatus for selecting a capillary tube for a refrigeration system according to claim 2, further comprising:

a housing positioning portion formed on an inner wall of the housing;

4. A device for selecting a capillary tube for a refrigeration system as set forth in claim 3 wherein said housing positioning portion is a recess and said gate positioning portion is a ball protruding from said gate body.

5. The apparatus for selecting a capillary tube for a refrigerant system as set forth in claim 4, wherein said ball is a spring ball.

6. A device for selecting a capillary tube for a refrigeration system as set forth in any one of claims 1 to 5, wherein a handle for pushing and pulling said strobe member is formed on said strobe member, and an operating portion of said handle is located outside said cavity.

7. The apparatus for selecting a capillary tube for a refrigeration system according to claim 6, wherein an identifier that presents said capillary tube branches that are in communication is further formed on said handle.

8. A method of selecting a capillary tube for a refrigeration system using the apparatus for selecting a capillary tube for a refrigeration system of any one of claims 1 to 7, the method comprising:

9. The method of selecting a capillary tube for a refrigeration system of claim 8, further comprising:

10. The method of selecting a capillary tube for a refrigeration system according to claim 8 or 9, further comprising: