Air conditioner refrigerant unloading valve and air conditioner

Abstract

The present invention discloses an air-conditioning refrigerant unloading valve and an air conditioner, comprising: a valve body, a valve cavity for refrigerant to flow through is arranged in the valve body, and a pressure relief port is arranged on the valve cavity; a valve core is slidably arranged in the valve cavity, a filter hole is arranged on the valve core, a reset element is supported between the valve core and the valve body, and when the refrigerant passes through the filter hole, it pushes the valve core to move to open or close the pressure relief port. The present invention integrates filtration and pressure relief, uses a movable filter component as a pressure-bearing component, can realize pressure relief while realizing filtration, simplifies the overall structure, eliminates the slender pipeline connecting the filter and the pressure relief valve, and reduces the occurrence of cold leakage faults.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioning, and in particular to an air conditioning refrigerant unloading valve and an air conditioning. Background Art

[0002] Air conditioners used in the arid and hot Middle East are usually T3 working condition air conditioners. T3 climate type air conditioners have a maximum working environment temperature of 52℃ and can adapt to tropical climates, so they are called tropical air conditioners. Compared with T1 air conditioners, the same cooling capacity requires higher exhaust pressure. Excessive exhaust pressure feedback causes the unit to be turned on and off continuously, shortening the service life of the unit. At present, the usual measures are: connecting a parallel unloading valve between the high-pressure side and the low-pressure side of the compressor. When the exhaust pressure is too high, the valve body opens, and part of the high-pressure gas flows back to the low-pressure area to relieve pressure, so that the unit can operate continuously. The parallel unloading valve makes the equipment complicated, and the pipeline between the filter and the pressure relief valve is slender, which is easy to be damaged in actual production and accumulates impurities. Therefore, a filter needs to be set in front of the unloading valve to isolate impurities, which makes the equipment and pipeline complicated, and requires more welding points to achieve pipeline connection. Stress tearing is prone to cold leakage during long-term operation.

[0003] Therefore, how to simplify the combination of pressure relief valves has become a technical problem that needs to be solved urgently in the industry. Summary of the invention

[0004] In order to solve the problem of complex combination of the filter and the pressure relief valve, the present invention proposes to integrate the filter and the pressure relief valve into one body, thereby eliminating the long and thin connecting pipeline.

[0005] The objective of the present invention can be achieved through the following technical solutions: a refrigerant unloading valve, comprising: a valve body, a valve cavity for the refrigerant to flow through is arranged in the valve body, a pressure relief port is arranged on the valve cavity; a valve core is slidingly arranged in the valve cavity, a filter hole is arranged on the valve core, a reset element is supported between the valve core and the valve body, and when the refrigerant passes through the filter hole, the valve core is pushed to move to connect or close the pressure relief port.

[0006] In some embodiments, a valve cavity inlet and a valve cavity outlet are provided at both ends of the valve cavity, and the filter surface where the filter holes are located is arched toward the valve cavity inlet.

[0007] In certain embodiments, the valve core includes a cylinder coaxial with the valve cavity, the inner cavity of the valve core cylinder is blocked by a partition, and the filter holes are distributed on the partition.

[0008] In some embodiments, a leakage port corresponding to the pressure relief port in the moving direction is provided on the cylinder wall of the valve core cylinder, the leakage port is located at the end of the valve core cylinder close to the valve cavity inlet, and the filter screen is located at the end of the valve core cylinder away from the valve cavity inlet.

[0009] In some embodiments, the separating part is a wire mesh filter.

[0010] In some embodiments, the reset element is a reset spring, and the end of the reset spring is supported between the end of the valve core and the outlet of the valve cavity.

[0011] In some embodiments, the outlet of the valve cavity has a reduced diameter.

[0012] In some embodiments, the reset element is a magnetic reset assembly, the magnetic reset assembly includes a first magnet disposed on the valve core and a second magnet disposed on the valve body, and two like poles of the first magnet and the second magnet are disposed opposite to each other.

[0013] In some embodiments, when the pressure difference across the valve core is greater than the set pressure difference, the refrigerant passes through the filter holes to push the valve core to move to open the pressure relief port.

[0014] An air conditioner having the above refrigerant unloading valve.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention integrates filtration and pressure relief, uses a movable filter component as a pressure-bearing component, can achieve pressure relief while realizing filtration, simplifies the overall structure, eliminates the slender pipeline connecting the filter and the pressure relief valve, and reduces the occurrence of cold leakage faults. The filter surface is designed as a spherical surface, which can increase the mesh number of the filter holes, increase the surface area of the flow-through, and reduce the resistance. The filter surface uses high-strength metal wires and has a good pressure-bearing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be described in detail below with reference to specific embodiments and the accompanying drawings. For the purpose of showing details and facilitating understanding of its principle, it is not necessarily drawn to scale, and similar reference numerals may describe similar components in different views. The drawings generally illustrate the embodiments discussed herein by way of example and not limitation. Among them:

[0018] Figure 1 is a combined schematic diagram of an existing parallel pressure relief valve and a filter valve.

[0019] Figure 2 is a schematic diagram of this embodiment.

[0020] In the figure, 1, pressure relief valve; 2, filter valve; 3, valve body; 4, pressure relief port; 5, valve core; 6, filter hole; 7, reset element; 8, valve cavity inlet; 9, valve cavity outlet; 10, discharge port. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments, and the following embodiments do not limit the invention involved in the claims. In addition, all combinations of the features described in the embodiments are not necessarily essential to the solution of the invention.

[0022] The principle and structure of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] Embodiment

[0024] As Figure 1 shown, it is the combination mode of the existing parallel pressure relief valve 1 and the filter valve 2. Such a combination mode makes the equipment complex, the connected pipeline slender, is easily damaged in actual production, requires more welding points to realize pipeline connection, and is prone to stress tearing and cold leakage during long-term operation.

[0025] Therefore, a new type of refrigerant unloading valve is designed. As Figure 2 shown, it includes: a valve body 3, a valve cavity for refrigerant to flow through is arranged in the valve body 3, the valve cavity is used to communicate with the pipeline on the high-pressure side of the compressor, and a pressure relief port 4 is arranged on the valve cavity; a valve core 5 is slidably arranged in the valve cavity, a filter hole 6 is arranged on the valve core 5, a reset element 7 is supported between the valve core 5 and the valve body 3, when the refrigerant passes through the filter hole 6, it pushes the valve core 5 to move to open or close the pressure relief port 4, and the pressure relief port 4 can be communicated with the low-pressure area suction pipe through a pipeline, for example, communicated with the suction port of the compressor. At this time, the filter is the filter element, thus realizing the integration and integration of filtration and pressure relief, simplifying the overall structure, eliminating the slender pipeline connecting the filter and the pressure relief valve 1, and reducing the occurrence of cold leakage faults.

[0026] A valve cavity inlet 8 and a valve cavity outlet 9 are arranged at both ends of the valve cavity for communicating with the pipeline to be pressure relieved. The refrigerant flows in from the valve cavity inlet 8 and thus flows out from the valve cavity outlet 9. The filter surface where the filter hole 6 is located arches towards the direction of the valve cavity inlet 8, that is, the filter surface is a spherical surface. The spherical surface design can increase the number of filter holes, increase the surface area of flow, and reduce the resistance.

[0027] The valve core 5 includes a cylinder coaxial with the valve cavity. The inner cavity of the cylinder of the valve core 5 is blocked by a partition part, and the filter holes 6 are distributed on the partition part. The partition part is a wire mesh filter. The mesh surface can use high-strength wire, has a good pressure-bearing effect, and the filter surface support is designed as a cylinder, with a smooth outer surface and a good fit with the shell of the valve body 3.

[0028] A flow discharge port 10 corresponding to the pressure relief port 4 in the moving direction is provided on the barrel wall of the valve core 5 cylinder body. The flow discharge port 10 is located at the end of the valve core 5 cylinder body close to the valve cavity inlet 8, and the filter screen is located at the end of the valve core 5 cylinder body far from the valve cavity inlet 8. The flow discharge port 10 is tangentially arranged with the pressure relief port 4. When the pressure difference on both sides of the valve core 5 is greater than the set pressure difference, the refrigerant passes through the filter holes 6 to push the valve core 5 to move so as to connect the pressure relief port 4, realizing rapid pressure relief.

[0029] The reset element 7 is a cylindrical reset spring, and the reset spring is arranged coaxially with the valve cavity. The end of the reset spring is supported between the end of the valve core 5 and the outlet of the valve cavity.

[0030] The valve cavity outlet 9 has a reduced diameter. The inlets and outlets at both ends of the valve body 3 and the unloading interface can have different reduced diameters according to the pipe diameter specifications of the system pipeline. One end of the reset spring is connected to the valve core 5 and is embedded in the shell of the valve body 3. The reduced diameter not only facilitates the installation with other pipelines, but also enables the other end of the reset spring to be supported on the reduced diameter part of the valve cavity outlet 9. Such a setting makes the overall structure simple and convenient for assembly.

[0031] The reset element 7 can also be a magnetic reset assembly, that is, the magnetic reset assembly includes a first magnet arranged on the valve core 5 and a second magnet arranged on the valve body 3. The two like magnetic poles of the first magnet and the second magnet are arranged opposite to each other. In this way, the repulsive force of the magnetic poles can also play a role of elastic reset. The magnet is, for example, a magnet.

[0032] The refrigerant unloading valve can be applied to the high-pressure pipeline of an air conditioner to prevent damage to the air conditioner caused by excessive pressure.

[0033] Although some terms are used more in this article, the possibility of using other terms is not excluded. These terms are only used to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention. For the execution order of actions, steps, etc. in the device and method shown in the specification and drawings, as long as there is no specific order limitation and the output of the previous process is not used in the subsequent process, it can be implemented in any order. The similar sequential terms (such as "first", "then", "secondly", "again", "then", etc.) used for convenience of description do not mean that they must be implemented in such an order.

[0034] Those of ordinary skill in the art should understand that all directional references (e.g., above, below, upward, up, downward, down, top, bottom, left, right, vertical, horizontal, etc.) are used descriptively in the drawings to assist the reader's understanding and do not represent (e.g., with respect to position, orientation, use, etc.) a limitation on the scope of the invention defined by the appended claims. It is only for the convenience of describing this application and simplifying the description. Without contrary indication, these directional terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. The directional terms "inside" and "outside" refer to the inside and outside relative to the contour of each component itself.

[0035] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper", etc. may be used herein to describe the spatial positional relationship of one device or feature to another device or feature as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figure is inverted, the device described as "above" or "over" another device or structure will then be positioned "below" or "under" another device or structure. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations of the spatial relative descriptions used herein will be made.

[0036] In addition, some ambiguous terms (e.g., substantially, certain, generally, etc.) may refer to a slight imprecision or slight deviation of a condition, quantity, value, dimension, etc., some of which are within the manufacturing tolerances or margins. It should be noted that the use of terms such as "first", "second", etc. to define components is only for the convenience of differentiating the corresponding components. Without further statement, the above terms have no special meaning, and thus should not be construed as a limitation on the protection scope of this application.

[0037] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways of substitution, but will not deviate from the spirit of the invention or exceed the scope defined by the appended claims.

Claims

1. Refrigerant unloading valve, comprising: Valve body, a valve cavity for refrigerant to flow through is provided inside the valve body, and a pressure relief port is provided on the valve cavity; characterized in that, a valve core is slidably arranged in the valve cavity, filter holes are provided on the valve core, a reset element is supported between the valve core and the valve body, and when the refrigerant passes through the filter holes, it pushes the valve core to move to open or close the pressure relief port; valve cavity inlets and valve cavity outlets are provided at both ends of the valve cavity, and the filter surface where the filter holes are located arches towards the direction of the valve cavity inlet; the valve core includes a cylinder coaxial with the valve cavity, the inner cavity of the valve core cylinder is blocked by a partition, and the filter holes are distributed on the partition; a flow discharge port corresponding to the pressure relief port in the moving direction is provided on the cylinder wall of the valve core cylinder, the flow discharge port is located at the end of the valve core cylinder close to the valve cavity inlet, and the filter holes are located at the end of the valve core cylinder far from the valve cavity inlet.

2. The refrigerant unloading valve according to claim 1, wherein The partition is a wire mesh filter.

3. The refrigerant unloading valve according to claim 1, wherein The reset element is a reset spring, and the end of the reset spring is supported between the end of the valve core and the outlet of the valve cavity.

4. The refrigerant unloading valve according to claim 3, wherein The valve cavity outlet has a constriction.

5. The refrigerant unloading valve according to claim 1, characterized in that, The reset element is a magnetic reset assembly, and the magnetic reset assembly includes a first magnet provided on the valve core and a second magnet provided on the valve body, and two like-named magnetic poles of the first magnet and the second magnet are arranged opposite to each other.

6. The refrigerant unloading valve according to claim 1, characterized in that, When the pressure difference on both sides of the valve core is greater than the set pressure difference, the refrigerant passes through the filter holes and pushes the valve core to move to open the pressure relief port.

7. An air conditioner, characterized in that, There is a refrigerant unloading valve as described in any one of claims 1 to 6.

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