Pressure relief mechanism and scroll compressor
By setting up a pressure relief channel and pressure relief valve inside the compressor, the refrigerant in the high-pressure chamber is transported to the low-pressure chamber, which solves the safety hazards and environmental pollution problems of traditional external pressure relief methods, and realizes the effective recycling of refrigerant and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2026-03-03
AI Technical Summary
Traditional electric scroll compressors have external pressure relief methods that pose safety hazards, cause environmental pollution, and are costly, especially when using flammable refrigerant R290.
Design an internal pressure relief mechanism that, by setting a pressure relief channel and a pressure relief valve inside the compressor, transports the refrigerant from the high-pressure chamber to the low-pressure chamber, thereby realizing the recycling of the refrigerant and avoiding direct discharge.
It improves safety, reduces environmental pollution, lowers operating costs, adapts to the use of flammable refrigerants, and enhances the stability and efficiency of pressure relief.
Smart Images
Figure CN223964593U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of scroll compressor technology, and more specifically, to a pressure relief mechanism and a scroll compressor. Background Technology
[0002] With the increasingly widespread application of electric scroll compressors in the field of new energy vehicles, higher requirements are being placed on their safety and reliability. To protect the compressor and its system from overpressure damage, most electric scroll compressors are equipped with pressure relief devices to ensure that the system operates within a safe pressure range. Since new energy vehicles generally use non-flammable and highly safe refrigerants such as R134a, traditional electric scroll compressors mostly employ external pressure relief methods: that is, by installing an external pressure relief valve with a specific pressure specification on the high-pressure chamber or exhaust side of the compressor, when the exhaust pressure exceeds the set value, the valve automatically opens, directly venting the refrigerant gas to the atmosphere, thus releasing the high-pressure gas.
[0003] With the development and increasing application of new energy vehicles in recent years, and the growing attention people pay to environmental issues such as global warming, the traditional external pressure relief method for electric scroll compressors is increasingly showing its limitations.
[0004] 1) Refrigerant upgrades. Non-flammable refrigerants such as R134a will be gradually replaced by environmentally friendly R290. Because R290 is a Class A3 highly flammable refrigerant, using external pressure relief methods poses a significant safety hazard.
[0005] 2) Traditional R134a refrigerant has a high warming potential, and long-term release into the air will cause a high greenhouse effect, which is not conducive to long-term development.
[0006] 3) Safety issues. The working environment of compressors is usually harsh, and external pressure relief methods can easily cause the pressure relief valve to become clogged and malfunction, preventing high-pressure gas from being discharged in time and creating certain safety hazards;
[0007] 4) Cost issues. Long-term direct release of refrigerant gas into the external environment prevents the refrigerant from being effectively recycled, resulting in high waste rates and increased operating costs. Utility Model Content
[0008] The purpose of this invention includes, for example, providing a pressure relief mechanism and a scroll compressor, which can perform refrigerant pressure relief operations inside the compressor, and such a pressure relief mechanism can enable the refrigerant to circulate effectively inside the compressor, while also improving safety.
[0009] The embodiments of this utility model can be implemented as follows:
[0010] In a first aspect, this utility model provides a pressure relief mechanism, comprising:
[0011] Main housing, rear housing, main frame, stationary scroll valve, and pressure relief valve;
[0012] The end face of the main housing is connected to the opening of the rear housing, and the main frame is disposed at the end of the main housing near the rear housing; the static vortex is disposed in the rear housing in a closed manner, and the top of the static vortex and the rear housing enclose a high-pressure chamber, which includes an exhaust high-pressure chamber and an oil return high-pressure chamber.
[0013] The rear housing is provided with a through pressure relief channel; along the extending direction of the pressure relief channel, the pressure relief channel has a starting end and an ending end;
[0014] The starting end of the pressure relief channel extends into the high-pressure chamber, and a pressure relief valve is located at the starting end; the end of the pressure relief channel is connected to the intake chamber via a connecting channel.
[0015] In an optional embodiment, the outer wall of the static vortex and the inner wall of the rear housing enclose each other to form an annular intake chamber.
[0016] In an optional embodiment, the inner wall of the main housing and the main frame enclose the air intake chamber.
[0017] In an optional embodiment, the starting end of the pressure relief channel forms an inlet on the inner wall of the rear housing;
[0018] The top inner wall of the rear housing is provided with a stepped portion, and the stepped portion has a gap from the static vortex; the inlet is provided in the stepped portion, and the inlet is directly opposite the top of the static vortex.
[0019] In an optional embodiment, the pressure relief channel includes a first segment and a second segment connected in sequence, the first segment and the second segment having an included angle.
[0020] In an optional implementation, the first segment and the second segment are perpendicular to each other.
[0021] In an optional embodiment, the first segment is perpendicular to the substrate of the static vortex.
[0022] In an optional embodiment, the connection channel is located on the outside of the main housing and / or the rear housing.
[0023] In an optional embodiment, the connection channel is located inside the main housing and / or the rear housing.
[0024] Secondly, this utility model provides a scroll compressor, which includes the pressure relief mechanism described in any of the foregoing embodiments.
[0025] The beneficial effects of this utility model embodiment include, for example:
[0026] The pressure relief mechanism of this design includes a main housing, a rear housing, a main frame, a stationary scroll, and a pressure relief valve. The top of the stationary scroll and the top wall of the rear housing enclose a high-pressure chamber, and the two ends of the pressure relief channel of the stationary scroll can connect to the high-pressure chamber and the suction chamber, respectively. Because the pressure in the high-pressure chamber is higher and the pressure in the suction chamber is lower, the pressure relief channel can thus transfer refrigerant from the high-pressure chamber to the low-pressure chamber, thereby achieving pressure relief. This method of placing the pressure relief channel inside the compressor improves the safety and environmental pollution problems caused by external pressure relief, while also effectively circulating refrigerant and reducing operating costs. In summary, this pressure relief mechanism has the advantages of simple structure, convenient installation, energy saving and environmental protection, and low operating costs. Attached Figure Description
[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0028] Figure 1 This is a schematic diagram of the pressure relief mechanism according to Embodiment 1 of this utility model;
[0029] Figure 2 This is a schematic diagram of the pressure relief mechanism in Embodiment 2 of this utility model.
[0030] Icons: 11-Exhaust high-pressure chamber; 12-Intake chamber; 100-Main housing; 200-Rear housing; 210-Pressure relief channel; 211-Starting end; 212-End; 213-Inlet; 220-Step section; 231-First section; 232-Second section; 300-Main frame; 400-Static vortex; 500-Pressure relief valve; 600-Connection channel. Detailed Implementation
[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0034] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0035] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0036] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.
[0037] Example 1
[0038] Please refer to Figure 1 This embodiment provides a pressure relief mechanism, including a main housing 100, a rear housing 200, a main frame 300, a stationary scroll 400, and a pressure relief valve 500;
[0039] The end face of the main housing 100 is connected to the opening of the rear housing 200, and the main frame 300 is located at the end of the main housing 100 near the rear housing 200; the static vortex 400 is sealed in the rear housing 200, and the top of the static vortex 400 and the rear housing 200 enclose a high-pressure chamber, which includes an exhaust high-pressure chamber 11 and an oil return high-pressure chamber.
[0040] A through pressure relief channel 210 is provided in the rear housing 200; along the extending direction of the pressure relief channel 210, the pressure relief channel 210 has a starting end 211 and an ending end 212.
[0041] The starting end 211 of the pressure relief channel 210 extends into the high-pressure chamber, and the pressure relief valve 500 is located at the starting end 211; the ending end 212 of the pressure relief channel 210 is connected to the intake chamber 12 through the connecting channel 600.
[0042] In this design, the top of the stationary scroll 400 and the top wall of the rear housing 200 enclose a high-pressure exhaust chamber in the pressure relief mechanism. The pressure relief channel 210 located at both ends of the stationary scroll 400 connects to the high-pressure exhaust chamber and the suction chamber 12, respectively. Because the pressure in the high-pressure exhaust chamber is higher than that in the suction chamber 12, the pressure relief channel 210 allows refrigerant to be transferred from the high-pressure chamber to the low-pressure chamber, thus achieving pressure relief. This method of placing the pressure relief channel 210 inside the compressor improves the safety and environmental pollution issues caused by external pressure relief, while also effectively circulating the refrigerant and reducing operating costs.
[0043] It should be noted that in this embodiment, the starting end 211 of the pressure relief channel 210 extends into the exhaust high-pressure chamber 11.
[0044] from Figure 1 It can also be seen that, in an optional embodiment, the outer wall of the stationary vortex 400 and the inner wall of the rear housing 200 enclose an annular suction chamber 12. That is, the suction chamber 12 is located in the rear housing 200, since the pressure relief channel 210 is also in the rear housing 200. This arrangement can shorten the length of the connecting channel 600, thereby improving the pressure relief efficiency, reducing energy loss, and also improving the refrigerant circulation efficiency.
[0045] Furthermore, in an optional embodiment, the starting end 211 of the pressure relief channel 210 forms an inlet 213 on the inner wall of the rear housing 200; the top inner wall of the rear housing 200 is provided with a step portion 220, and the step portion 220 has a gap from the stationary scroll 400; the inlet 213 is provided in the step portion 220, and the inlet 213 is directly opposite the top of the stationary scroll 400. That is, the gap formed between the inlet 213 of the pressure relief channel 210 and the top of the stationary scroll 400 facilitates the smooth entry of high-pressure refrigerant into the pressure relief channel 210, avoiding interference with the stationary scroll 400; on the other hand, the pressure relief channel 210 can be manufactured using the existing step portion 220, which is beneficial for simplifying the process and saving costs.
[0046] It should be noted that in other embodiments of this utility model, the inlet 213 of the pressure relief channel 210 can also be set in other positions. This is just an example and is not intended to limit the scope.
[0047] In an optional embodiment, the pressure relief channel 210 includes a first segment 231 and a second segment 232 connected in sequence, with the first segment 231 and the second segment 232 forming an included angle. This further shortens the length of the pressure relief channel 210, thereby providing pressure relief efficiency and increasing refrigerant circulation efficiency.
[0048] In an optional embodiment, the first segment 231 and the second segment 232 are perpendicular to each other. It is easy to understand that in other embodiments of this utility model, the first segment 231 and the second segment 232 can also be acute angles, obtuse angles, or the first segment 231 and the second segment 232 can be parallel, etc. This is just an example and is not limited to any specific embodiment.
[0049] In an optional embodiment, the first segment 231 is perpendicular to the base plate of the stationary scroll 400. This separates the inlet 213 of the pressure relief channel 210 from the exhaust port of the stationary scroll 400, preventing them from interfering with each other and thus ensuring the stable operation of the compressor.
[0050] Optionally, the pressure relief valve 500 is located in the first section 231, which can quickly and efficiently relieve the high-pressure refrigerant through the inlet 213 radially, ensuring the safety and stability of the pressure relief.
[0051] It should be noted that the rear housing 200 has a high-pressure return oil chamber, and the starting end 211 of the pressure relief channel 210 is directly opposite the high-pressure return oil chamber (i.e., the pressure relief valve 500 is used to relieve pressure in the high-pressure return oil chamber). However, it is necessary to ensure a sufficient height difference between the return oil hole and the pressure relief channel 210 to ensure that lubricating oil does not enter the low-pressure chamber from the pressure relief channel 210.
[0052] As can also be seen from the figure, in an optional embodiment, the connecting channel 600 is located on the outside of the main housing 100 and / or the rear housing 200. That is, the connecting channel 600 here is an external pipe. Optionally, the connecting channel 600 can also be directly disposed inside the rear housing 200.
[0053] In use, when the pressure relief valve 500 is opened, the high-temperature and high-pressure refrigerant gas is discharged into the low-pressure chamber through the pressure relief channel 210 located inside the rear housing 200 and the external connecting channel 600, thereby achieving the purpose of pressure relief. The low-pressure chamber here can be an annular low-pressure chamber between the vortex and the rear housing 200.
[0054] Example 2
[0055] Please see Figure 2 The pressure relief mechanism in this embodiment is largely the same as that in the previous embodiment, except that in this embodiment, the inner wall of the main housing 100 and the main frame 300 enclose the air intake chamber 12. That is, the low-pressure chamber is a cavity enclosed by the main housing 100 and the rear housing 200. Correspondingly, the external connecting channel 600 extends from the rear housing 200 to the main housing 100 and connects to the air intake chamber 12.
[0056] It is easy to understand that the connection channel 600 can also be directly set inside the main housing 100 and / or the rear housing 200.
[0057] Secondly, this utility model provides a scroll compressor, which includes the pressure relief mechanism of any of the foregoing embodiments. Such a scroll compressor includes all the beneficial effects of the aforementioned pressure relief mechanism. Through the safe and stable pressure relief operation of the pressure relief mechanism, the scroll compressor can be guaranteed to operate efficiently and stably, while also being low in cost and safer.
[0058] In summary, the present invention provides a pressure relief mechanism and a scroll compressor, which have at least the following advantages:
[0059] 1) It is applicable to A3-class flammable refrigerants such as R290, avoiding safety hazards caused by refrigerant discharge, and has a wider range of applications;
[0060] 2) It enables the refrigerant to be effectively recycled, reducing refrigerant waste and avoiding environmental problems caused by direct refrigerant emissions;
[0061] 3) The pressure relief valve 500 is built-in, which can avoid the blockage problem caused by harsh environment, making it more adaptable and safer.
[0062] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A pressure relief mechanism, characterized in that, include: Main housing (100), rear housing (200), main frame (300), static scroll (400) and pressure relief valve (500); The end face of the main housing (100) is connected to the opening of the rear housing (200), and the main frame (300) is disposed at the end of the main housing (100) near the rear housing (200); the static vortex (400) is disposed in the rear housing (200) in a closed manner, and the top of the static vortex (400) and the rear housing (200) enclose a high-pressure chamber, which includes an exhaust high-pressure chamber (11) and an oil return high-pressure chamber (13); The rear housing (200) is provided with a through pressure relief channel (210); along the extending direction of the pressure relief channel (210), the pressure relief channel (210) has a starting end (211) and an ending end (212) opposite to each other; The starting end (211) of the pressure relief channel (210) extends into the high-pressure chamber, and the pressure relief valve (500) is located at the starting end (211); the ending end (212) of the pressure relief channel (210) is connected to the intake chamber (12) through the connecting channel (600).
2. The pressure relief mechanism according to claim 1, characterized in that: The outer wall of the static vortex (400) and the inner wall of the rear housing (200) enclose each other to form the annular air intake chamber (12).
3. The pressure relief mechanism according to claim 1, characterized in that: The inner wall of the main housing (100) and the main frame (300) enclose the air intake chamber (12).
4. The pressure relief mechanism according to claim 1, characterized in that: The starting end (211) of the pressure relief channel (210) forms an inlet (213) on the inner wall of the rear housing (200); The top inner wall of the rear housing (200) is provided in a stepped portion (220), and the stepped portion (220) has a gap from the stationary vortex (400); the inlet (213) is provided in the stepped portion (220), and the inlet (213) is directly opposite the top of the stationary vortex (400).
5. The pressure relief mechanism according to claim 1, characterized in that: The pressure relief channel (210) includes a first segment (231) and a second segment (232) connected in sequence, with the first segment (231) and the second segment (232) having an included angle.
6. The pressure relief mechanism according to claim 5, characterized in that: The first segment (231) and the second segment (232) are perpendicular to each other.
7. The pressure relief mechanism according to claim 5, characterized in that: The first segment (231) is perpendicular to the substrate of the static vortex (400).
8. The pressure relief mechanism according to claim 1, characterized in that: The connection channel (600) is located outside the main housing (100) and / or the rear housing (200).
9. The pressure relief mechanism according to claim 1, characterized in that: The connection channel (600) is located inside the main housing (100) and / or the rear housing (200).
10. A scroll compressor, characterized in that: The scroll compressor includes the pressure relief mechanism according to any one of claims 1-9.