Refrigerant pressure detection structure and air conditioner

Abstract

This invention provides a refrigerant pressure detection structure and an air conditioner. The refrigerant pressure detection structure includes a refrigerant pipe and a pressure detection component. A refrigerant charging nozzle is connected to the wall of the refrigerant pipe. The pressure detection component includes a pressure switch assembly and a threaded connection. The pressure switch assembly is detachably connected to the refrigerant charging nozzle via the threaded connection. The inner cavity of the threaded connection has a force-applying column, and during the connection between the threaded connection and the refrigerant charging nozzle, the force-applying column applies force to the valve core of the refrigerant charging nozzle, causing the valve core to switch from a cut-off state to a connected state. This invention significantly improves the maintenance efficiency of the pressure detection component, reduces the likelihood of maintaining the refrigerant charging nozzle, and eliminates the need for refrigerant release and refilling operations in the refrigerant pipe during pressure detection component maintenance, significantly reducing maintenance costs.

Description

Technical Field

[0001] This utility model belongs to the field of air conditioning design technology, specifically relating to a refrigerant pressure detection structure and an air conditioner. Background Technology

[0002] In existing technologies, pressure switches are used to monitor the refrigerant pressure in the refrigerant pipes of air conditioners in real time. Traditionally, the connection between the pressure switch and the pipe is mostly through a pressure-testing branch pipe. One end of the pressure-testing branch pipe is welded to the refrigerant pipe, and the other end is equipped with the pressure switch. Since the diameter of the pressure-testing branch pipe is smaller than that of the refrigerant pipe, and the length of the pressure-testing branch pipe is generally large, there are problems such as low strength and easy fatigue leakage, which affect the stability and safety of equipment operation. When fatigue damage occurs at the weld position between the pressure-testing branch pipe and the refrigerant pipe, the refrigerant in the refrigerant pipe needs to be completely released before maintenance, and then recharged with refrigerant. This results in high maintenance costs and low maintenance efficiency. Utility Model Content

[0003] Therefore, this utility model provides a refrigerant pressure detection structure and an air conditioner that can overcome the shortcomings of related technologies, such as low strength, easy fatigue leakage, high maintenance cost, and low maintenance efficiency, where the pressure switch is connected to the refrigerant pipe through a thin pressure measuring branch pipe.

[0004] To address the aforementioned problems, this utility model provides a refrigerant pressure detection structure, including a refrigerant pipe and a pressure detection component. A refrigerant inlet is connected to the wall of the refrigerant pipe. The pressure detection component includes a pressure switch assembly and a threaded connection. The pressure switch assembly is detachably connected to the refrigerant inlet via the threaded connection. The inner cavity of the threaded connection has a force-applying column, and during the connection process between the threaded connection and the refrigerant inlet, the force-applying column can apply force to the valve core of the refrigerant inlet, causing the valve core to switch from a cut-off state to a connected state.

[0005] In some embodiments, the refrigerant nozzle has a reduced diameter section and a threaded section with external threads, the threaded portion being threaded to the threaded section, and the refrigerant pipe having a through hole penetrating its inner and outer walls, the reduced diameter section being inserted into the through hole and welded to the refrigerant pipe.

[0006] In some embodiments, the axial length of the fluorine injection nozzle is not greater than twice the axial length of the threaded connection and not less than the axial length of the threaded connection.

[0007] In some embodiments, an overflow port is formed on the bottom wall of the inner cavity of the threaded connection, and the overflow port is connected to the detection surface of the switching working part of the pressure switch assembly.

[0008] In some embodiments, the pressure switch assembly further includes a wiring portion comprising a cable assembly, and the switch operating portion has an electrical connector, the cable assembly being pluggably connected to the electrical connector.

[0009] In some embodiments, the electrical connector is a conductive sheet, and the cable assembly includes a cable and a female groove electrically connected to the end of the cable, the female groove and the conductive sheet being mated and plugged into each other.

[0010] In some embodiments, the conductive sheet and the female groove have a snap-fit ​​connection structure.

[0011] In some embodiments, the female groove component includes an insulating jacket and a conductor located within the insulating jacket, wherein when the female groove component is inserted into the conductive sheet, the conductor and the conductive sheet are in contact with each other; and / or, a water-blocking cover is provided on the outer wall of the cable, and the electrical connector is covered within the covering space of the water-blocking cover.

[0012] In some embodiments, the water shield is a deformable plastic part; and / or, the water shield is made of the same insulating sheath material as the cable.

[0013] This utility model also provides an air conditioner, including the above-mentioned refrigerant pressure detection structure.

[0014] The refrigerant pressure detection structure and air conditioner provided by this utility model have the following beneficial effects: The pressure detection component is threadedly connected to the refrigerant charging nozzle via its threaded connection. The valve core of the refrigerant charging nozzle can switch from a cut-off state to a connected state during the threaded connection process, thereby enabling quick and convenient assembly and disassembly of the pressure detection component and the refrigerant pipe, significantly improving the maintenance efficiency of the pressure detection component. At the same time, compared with the slender pressure measuring pipe in the prior art, the refrigerant charging nozzle is shorter and stronger, which can effectively prevent the fatigue damage phenomenon that occurs during compressor operation due to the excessive length of the pressure measuring pipe in the prior art. The reliability and stability of the connection between the refrigerant charging nozzle and the refrigerant pipe reduce the probability of maintenance of the refrigerant charging nozzle. When maintaining the pressure detection component, there is no need to release and refill the refrigerant in the refrigerant pipe, which significantly reduces maintenance costs. Designing the outer diameter of the section of the refrigerant injector closest to the refrigerant pipe to be relatively small can reduce the diameter of the refrigerant pipe's through hole, thus making the selection of the refrigerant pipe diameter more flexible. At the same time, the reduced diameter section 0 and the through hole insertion can also physically limit the insertion depth of the refrigerant injector, making it convenient to assemble and weld the refrigerant injector and the refrigerant pipe. Limiting the axial length of the refrigerant injection nozzle to no more than twice the axial length of the aforementioned threaded connection and no less than the axial length of the threaded connection ensures a reliable and stable connection between the pressure switch assembly and the refrigerant injection nozzle, while also preventing the excessive axial length of the refrigerant injection nozzle from causing a long cantilever and thus increasing the risk of fatigue damage. The switching and wiring components of the pressure switch assembly are designed to be detachable. If one of them fails and needs to be repaired, only the faulty part needs to be replaced instead of the whole assembly, thus reducing maintenance costs. The rainwater above will be blocked by the water shield, thereby improving the waterproof performance of the pressure detection component. This allows the refrigerant pressure detection structure of this invention to be applicable to different operating conditions, such as top-discharge fans or side-discharge fans. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. The drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0016] Figure 1 This is a schematic diagram (partial disassembly) of the pressure detection component in a refrigerant pressure detection structure according to an embodiment of this utility model. Figure 2 yes Figure 1 The left view shows a cross-sectional view of some components; Figure 3 This is a structural schematic diagram (partial disassembly schematic diagram) of the pressure detection component in the refrigerant pressure detection structure of another embodiment of the present invention. Figure 4 yes Figure 3 A partial sectional view; Figure 5 yes Figure 3 The left view; Figure 6 yes Figure 5 A partial sectional view.

[0017] The attached figures are labeled as follows: 1. Refrigerant injector; 101. Reduced diameter section; 102. Threaded section; 11. Valve core; 21. Threaded connection; 211. Force application column; 212. Flow port; 31. Switch working part; 311. Electrical connector; 3111. Locking hole; 321. Cable; 322. Female groove part; 4. Water baffle. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0019] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0020] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90° or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0021] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0022] See also Figures 1 to 6As shown in the figure, according to an embodiment of the present invention, a refrigerant pressure detection structure is provided, including a refrigerant pipe (not shown in the figure) and a pressure detection component (not labeled in the figure). A refrigerant inlet 1 is connected to the wall of the refrigerant pipe. The pressure detection component includes a pressure switch component (not labeled in the figure) and a threaded connection 21. The pressure switch component is detachably connected to the refrigerant inlet 1 via the threaded connection 21. The inner cavity of the threaded connection 21 has a force-applying column 211. During the threading process between the threaded connection 21 and the refrigerant inlet 1, the force-applying column 211 can apply force to the valve core 11 of the refrigerant inlet 1 so that the valve core 11 switches from a cut-off state to a connected state.

[0023] In this technical solution, the pressure detection component is threadedly connected to the refrigerant inlet 1 via its threaded connection 21. The valve core 11 of the refrigerant inlet 1 can switch from a cut-off state to a connected state during the threaded connection 21, enabling quick and convenient assembly and disassembly of the pressure detection component and the refrigerant pipe. This significantly improves the maintenance efficiency of the pressure detection component. Furthermore, compared to the slender pressure testing pipes in existing technologies, the refrigerant inlet 1 is shorter and stronger, effectively preventing fatigue damage during compressor operation caused by excessively long pressure testing pipes. The improved reliability and stability of the connection between the refrigerant inlet 1 and the refrigerant pipe reduce the likelihood of maintenance. When maintaining the pressure detection component, there is no need to release or refill the refrigerant in the refrigerant pipe, significantly reducing maintenance costs. In addition, the threaded structure facilitates disassembly and maintenance while also providing high sealing performance.

[0024] In some embodiments, the refrigerant inlet 1 has a reduced diameter section 101 and a threaded section 102 with external threads. The threaded connection 21 is threaded to the threaded section 102. The refrigerant pipe has a through hole penetrating the inner and outer sides of its pipe wall. The reduced diameter section 101 is inserted into the through hole and welded to the refrigerant pipe. It should be noted that the aforementioned reduced diameter section 101 refers to the fact that the diameter of this section is relatively smaller than that of the threaded section 102.

[0025] In this technical solution, the outer diameter of the section of the refrigerant injector 1 near the refrigerant pipe is designed to be relatively small, which can reduce the diameter of the through hole of the refrigerant pipe, thereby making the selection of the refrigerant pipe diameter more flexible. At the same time, the reduced diameter section 101 and the through hole insertion can also physically limit the insertion depth of the refrigerant injector 1, which facilitates the assembly and welding of the refrigerant injector 1 and the refrigerant pipe.

[0026] The aforementioned threaded connection 21 can be selected according to specific sealing requirements, such as a standard thread structure, or a tapered thread or a thread structure with an O-ring, depending on the usage environment, to enhance sealing performance. For example, a tapered thread structure can achieve self-sealing during tightening, which is suitable for high-pressure or high-sealing applications; while an O-ring structure achieves compression sealing when the thread is tightened by setting an elastic sealing ring at the front end of the thread, which is suitable for environments with vibration or large temperature differences, and prevents media leakage.

[0027] In some embodiments, the axial length of the fluorine injection nozzle 1 is not greater than twice the axial length of the threaded connection portion 21 and not less than the axial length of the threaded connection portion 21.

[0028] In this technical solution, the axial length of the refrigerant injection nozzle 1 is limited to no more than twice the axial length of the aforementioned threaded connection portion 21 and no less than the axial length of the threaded connection portion 21. This ensures a reliable and stable connection between the pressure switch assembly and the refrigerant injection nozzle 1, while also preventing the excessive axial length of the refrigerant injection nozzle 1 from causing a long cantilever and thus increasing the risk of fatigue damage.

[0029] In some embodiments, an overflow port 212 is formed on the bottom wall of the inner cavity of the threaded connection 21. The overflow port 212 communicates with the detection surface (not shown in the figure) of the switching working part 31 of the pressure switch assembly to ensure that the switching working part 31 can accurately detect the refrigerant pressure in the refrigerant pipe in real time. It is understood that the aforementioned inner cavity is specifically an open cavity facing the refrigerant inlet 1. Correspondingly, the aforementioned force-applying column 211 is formed on the bottom wall of the aforementioned inner cavity. It should be noted that the aforementioned switching working part 31 can be an electronic pressure switch (pressure sensor) in the prior art, and its detection surface can be, for example, a strain gauge.

[0030] The pressure switch assembly also includes a wiring section (not shown in the figure), which includes a cable assembly. The switch working part 31 has an electrical connector 311. In a preferred embodiment, the cable assembly is plugged into and detached from the electrical connector 311. Specifically, the electrical connector 311 is a conductive sheet. The cable assembly includes a cable 321 and a female groove 322 electrically connected to the end of the cable 321. The female groove 322 and the conductive sheet are mated and plugged into each other. It is understood that the aforementioned switch working part 31 is responsible for sensing pressure changes and performing switching actions, that is, it is a pressure sensing component. The aforementioned wiring part is used to connect to an external control system to realize signal transmission. The specific functional modules are conventional designs and are not protected by this utility model, so they will not be described in detail here.

[0031] In this technical solution, the switching working part 31 and the circuit part of the pressure switch assembly are designed as detachable structures. When one of them fails and needs to be repaired, only the faulty part needs to be replaced separately instead of the whole assembly, thus reducing maintenance costs.

[0032] In some embodiments, the conductive sheet and the female groove 322 have a snap-fit ​​connection structure. Specifically, the snap-fit ​​connection structure includes a snap hole 3111 formed on the electrical connector 311 and a snap protrusion (not shown in the figure) formed on the inner wall of the groove of the female groove 322. This ensures a reliable and stable connection between the cable assembly and the conductive sheet, preventing poor contact or detachment due to vibration. The end of the wiring portion away from the female groove 322 can be integrated with a terminal block or cable lead-out structure for easy connection to external control equipment.

[0033] In one specific embodiment, the female slot 322 includes an insulating jacket and a conductor (not shown in the figure) located within the insulating jacket. When the female slot 322 is inserted into the conductive sheet, the conductor and the conductive sheet are in contact with each other to improve electrical safety. Specifically, the aforementioned insulating jacket can be made of high-strength plastic insulating material, and the aforementioned conductor can form a composite structure with the high-strength plastic insulating material to ensure good conductivity and mechanical strength.

[0034] In some embodiments, a water-retaining cover 4 is provided on the outer wall of the cable 321, and the electrical connector 311 is covered within the covering space of the water-retaining cover 4, see details below. Figures 3 to 6 As shown, in the illustrated orientation, the rainwater above will be blocked by the water-blocking cover 4, thereby improving the waterproof performance of the pressure detection component. Because the water-blocking cover 4 is installed on the cable 321 in this invention, the refrigerant pressure detection structure of this invention can be applied to different operating conditions such as top-discharge fans or side-discharge fans, improving the structural versatility of this invention.

[0035] In some embodiments, the water shield 4 is a deformable plastic part, so that the water shield 4 can be flipped up when inserting the aforementioned female groove 322 and electrical connector 311, and can be flipped down after insertion. In a preferred embodiment, the water shield 4 and the cable 321 have the same insulating outer sheath material, so the water shield 4 and the cable 321 can be integrally formed.

[0036] The entire structure of this utility model adopts a modular design, and the components are connected through standardized interfaces, which facilitates quick replacement and maintenance, significantly reducing maintenance costs and time. This structure is suitable for a variety of industrial applications, especially for systems with frequent pressure pulsation and maintenance.

[0037] According to an embodiment of the present invention, an air conditioner is also provided, including the above-described refrigerant pressure detection structure.

[0038] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0039] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A refrigerant pressure detection structure, characterized in that, The device includes a refrigerant pipe and a pressure detection assembly. A refrigerant inlet (1) is connected to the wall of the refrigerant pipe. The pressure detection assembly includes a pressure switch assembly and a threaded connection (21). The pressure switch assembly is detachably connected to the refrigerant inlet (1) via the threaded connection (21). The inner cavity of the threaded connection (21) has a force-applying column (211). During the connection between the threaded connection (21) and the refrigerant inlet (1), the force-applying column (211) can apply force to the valve core (11) of the refrigerant inlet (1) so that the valve core (11) switches from a cut-off state to a connected state.

2. The refrigerant pressure detection structure according to claim 1, characterized in that, The refrigerant nozzle (1) has a reduced diameter section (101) and a threaded section (102) with external threads. The threaded connection (21) is threaded to the threaded section (102). A through hole is formed on the refrigerant pipe, penetrating the inner and outer sides of its pipe wall. The reduced diameter section (101) is inserted into the through hole and welded to the refrigerant pipe.

3. The refrigerant pressure detection structure according to claim 1, characterized in that, The axial length of the fluorine injection nozzle (1) is not greater than twice the axial length of the threaded connection (21) and not less than the axial length of the threaded connection (21).

4. The refrigerant pressure detection structure according to claim 1, characterized by An overflow port (212) is formed on the bottom wall of the inner cavity of the threaded connection (21), and the overflow port (212) is connected to the detection surface of the switching working part (31) of the pressure switch assembly.

5. The refrigerant pressure detection structure according to claim 4, wherein The pressure switch assembly also includes a wiring section, which includes a cable assembly, and the switch working part (31) has an electrical connector (311), and the cable assembly is plugged into the electrical connector (311).

6. The refrigerant pressure detection structure according to claim 5, wherein The electrical connector (311) is a conductive sheet, and the cable assembly includes a cable (321) and a female groove (322) electrically connected to the end of the cable (321). The female groove (322) and the conductive sheet are matched and plugged into each other.

7. The refrigerant pressure detection structure according to claim 6, wherein The conductive sheet and the female groove (322) have a snap-fit ​​connection structure.

8. The refrigerant pressure detection structure according to claim 6, characterized in that, The female groove component (322) includes an insulating jacket and a conductor inside the insulating jacket. When the female groove component (322) is inserted into the conductive sheet, the conductor and the conductive sheet are in contact with each other; and / or, a water shield (4) is provided on the outer wall of the cable (321), and the electrical connector (311) is covered in the covering space of the water shield (4).

9. The refrigerant pressure detection structure according to claim 8, wherein The water shield (4) is a deformable plastic part; and / or, the water shield (4) has the same insulating outer sheath material as the cable (321).

10. An air conditioner characterized by comprising: The refrigerant pressure detection structure includes any one of claims 1 to 9.

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