Housing, housing assembly method and compressor

Abstract

The application provides a shell, a shell assembling method and a compressor, and the shell comprises a front cover and a rear shell, the rear shell is provided with a circumferentially-extended ring groove on an end face, and the front cover can be covered on the end face of the rear shell to close the ring groove and form an isolation cavity. According to the technical scheme of the application, the ring groove is arranged on the end face of the rear shell, and a double-sealing structure is formed in structure, so that the sealing performance is improved. When the internal refrigerant leaks, the isolation cavity formed by closing the ring groove by the front cover can play a buffering role, refrigerant is prevented from leaking directly to the outside, and the scale of instantaneous refrigerant leakage can be reduced.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and particularly to a housing, a housing assembly method, and a compressor. Background Technology

[0002] Currently, compressors are widely used in various fields, such as refrigerators, air conditioners and other refrigeration appliances. Moreover, the application scenarios of these appliances are not limited to indoor home environments, but are also widely used in vehicles such as automobiles. As a result, compressors are also widely used in vehicles such as automobiles.

[0003] However, with increasingly stringent environmental protection requirements, there are strict restrictions on the refrigerants used inside compressors, which must meet corresponding environmental standards. Therefore, the industry has begun to adopt some natural and environmentally friendly refrigerants. However, these natural and environmentally friendly refrigerants often place additional challenges on the structural performance of compressors. For example, the widely used R290 natural and environmentally friendly refrigerant has the advantages of low GWP (Global Warming Potential) and low boiling point, meeting environmental requirements. However, this type of refrigerant is flammable and prone to explosion in air. Therefore, using this type of refrigerant places significant challenges and requirements on the sealing and safety of the compressor's structural design.

[0004] Most current compressors only use sealing rings to seal the joints, which is obviously unreliable in long-term use and prone to refrigerant leakage. For compressors using flammable refrigerants such as R290, refrigerant leakage could potentially lead to combustion, explosion, and other safety accidents.

[0005] Therefore, it is necessary to optimize the design of the compressor casing to improve its sealing performance and leak-proof capabilities, so as to avoid safety accidents caused by refrigerant leakage. Summary of the Invention

[0006] To address the problem that the sealing structure of existing compressor housings is unreliable and makes them unsuitable for some refrigerants with high sealing requirements, this invention proposes a housing, a housing assembly method, and a compressor.

[0007] In a first aspect, the present invention provides a housing comprising:

[0008] Front cover; and

[0009] The rear housing has an annular groove extending circumferentially on its end face;

[0010] The front cover can be fitted onto the end face of the rear shell to close the annular groove and form an isolation cavity.

[0011] In one embodiment, the isolation chamber is configured as a vacuum or the isolation chamber is filled with a refrigerant inhibitor.

[0012] In one embodiment, the rear shell has a first channel communicating with the annular groove, and a vent connector is fitted in the first channel. The vent connector is capable of evacuating and / or injecting refrigerant inhibitor into the isolation cavity formed by the annular groove.

[0013] In one embodiment, the rear shell has an outer ring portion and an inner ring portion that form the annular groove, and the inner side of the inner ring portion is the inner cavity of the rear shell;

[0014] The first channel is disposed on the outer ring portion, and the inner ring portion has a second channel corresponding to and coaxial with the first channel, and the isolation cavity is connected to the inner cavity through the second channel;

[0015] The vent connector can move axially along the first channel and the second channel to control whether the vent end of the vent connector enters or does not enter the second channel, thereby controlling whether the isolation cavity is connected to the inner cavity.

[0016] In one embodiment, the inner diameter of the first channel is larger than the inner diameter of the second channel, the vent connector is a variable diameter structure, the vent connector includes a first connector portion and a second connector portion whose radial dimensions are respectively matched with the first channel and the second channel, and the vent end is the end of the second connector portion.

[0017] In one embodiment, at least one of the two channels is provided with a vent sealing ring on the inner wall of the first channel, and the vent connector is provided with a vent sealing ring on the outer surface at least at the vent end, the vent sealing ring being used to seal the gap between the channel and the vent connector.

[0018] In one embodiment, the rear housing has an outer ring portion and an inner ring portion that form the annular groove, and an end face sealing ring is provided on the end face of both the outer ring portion and the inner ring portion.

[0019] In one embodiment, the rear cover has a plurality of circumferentially distributed fastening grooves at the bottom of the annular groove, and the front cover has a plurality of circumferentially distributed mounting holes on its edge. The mounting holes and the fastening grooves can cooperate with fasteners to connect the front cover and the rear cover.

[0020] In one embodiment, the diameters of both the mounting hole and the fastening groove are smaller than the width of the annular groove.

[0021] In one embodiment, the front cover is provided with an exhaust connector communicating with its interior, and the exhaust connector communicates with the inner cavity of the rear cover after the front cover and the rear cover are assembled.

[0022] In one embodiment, the pressure P2 of the refrigerant inhibitor injected into the isolation cavity satisfies: P3≤P2≤P1; where P1 is the minimum pressure in the inner cavity of the housing when the compressor is running, and P3 is the external ambient pressure.

[0023] Secondly, the present invention provides a shell assembly method, comprising:

[0024] The front cover of the housing is assembled to the rear cover, so that the front cover is fastened to the end face of the rear cover and closes the annular groove on the end face of the rear cover to form an isolation cavity;

[0025] The isolation chamber is evacuated to a vacuum state through a first channel on the rear shell that communicates with the isolation chamber, using a vent connector in the first channel.

[0026] Refrigerant is injected into the inner cavity of the rear shell.

[0027] In one embodiment, after evacuating the isolation chamber to a vacuum state using the vent connector in the first channel, the method further includes:

[0028] The refrigerant inhibitor is injected into the isolation chamber using the vent connector.

[0029] In one implementation, it further includes:

[0030] The vent connector is positioned so that its venting end does not enter the second channel connecting the isolation chamber and the inner cavity, thus maintaining communication between the isolation chamber and the inner cavity through the second channel;

[0031] The isolation chamber and the inner chamber are simultaneously evacuated to a vacuum state using the vent connector.

[0032] Position the vent connector so that its vent end enters the second channel, and maintain a sealed contact between the vent end and the inner wall of the second channel, and inject refrigerant into the inner cavity using the vent connector.

[0033] In one embodiment, after simultaneously evacuating the isolation chamber and the inner chamber to a vacuum state using the vent connector, the method further includes:

[0034] Refrigerant inhibitors are simultaneously injected into the isolation chamber and the inner chamber using the vent connector;

[0035] The vent connector is positioned so that its vent end enters the second channel, and the vent end remains in sealed contact with the inner wall of the second channel.

[0036] The refrigerant inhibitor in the inner cavity is extracted using the vent connector, and then refrigerant is injected into the inner cavity using the vent connector.

[0037] Thirdly, the present invention provides a compressor that includes the aforementioned housing, thereby possessing all the technical effects it possesses.

[0038] The above-mentioned technical features can be combined in various suitable ways or replaced by equivalent technical features, as long as the purpose of the present invention can be achieved.

[0039] The housing, housing assembly method, and compressor provided by this invention have at least the following advantages compared with the prior art:

[0040] The present invention discloses a housing, a housing assembly method, and a compressor. By constructing an annular groove on the end face of the rear housing, a double sealing structure is formed in the structure, thereby improving the sealing performance. Furthermore, the isolation cavity formed by the annular groove after being closed by the front cover can also play a buffering role when the internal refrigerant leaks, preventing the refrigerant from leaking directly to the outside and reducing the scale of instantaneous refrigerant leakage. Therefore, it is suitable for refrigerants with high requirements for sealing performance. Attached Figure Description

[0041] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0042] Figure 1 An exploded view of the casing structure of the present invention is shown;

[0043] Figure 2 The image shows a frontal projection view of the housing of the present invention;

[0044] Figure 3 The housing of the present invention is shown in Figure 2 A sectional view from a specific perspective;

[0045] Figure 4 This shows a cross-sectional view of the housing of the present invention from another perspective;

[0046] Figure 5 A schematic diagram showing the relevant dimensions of the vent connector of the housing and the channel on the rear shell of the present invention is provided.

[0047] Figure 6 A schematic diagram showing the first stage of the housing assembly process of the present invention is shown;

[0048] Figure 7 A schematic diagram showing the second stage of the housing assembly process of the present invention is shown;

[0049] Figure 8 A schematic diagram of the third stage of the housing assembly process of the present invention is shown.

[0050] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale.

[0051] Figure label:

[0052] 1-Front cover, 11-Exhaust connector, 2-Rear shell, 21-Annular groove, 211-Fasting groove, 22-Outer ring, 23-Inner ring, 24-Inner cavity, 3-Isolation cavity, 4-First channel, 5-Second channel, 6-Ventilator, 61-First connector, 62-Second connector, 7-Ventilator sealing ring, 8-End face sealing ring. Detailed Implementation

[0053] The invention will now be further described with reference to the accompanying drawings.

[0054] Example 1

[0055] An embodiment of the present invention provides a housing, comprising:

[0056] Front cover 1; and

[0057] The rear shell 2 has an annular groove 21 extending circumferentially on its end face. The rear shell 2 has an outer ring portion 22 and an inner ring portion 23 that form the annular groove 21. An end face sealing ring 8 is provided on the end face of both the outer ring portion 22 and the inner ring portion 23.

[0058] The front cover 1 can be fitted onto the end face of the rear shell 2 to close the annular groove 21 and form an isolation cavity 3.

[0059] Specifically, the present invention first designs the structure of the assembly part of the compressor housing, that is, firstly, designs an annular groove 21 structure on the end face of the rear housing 2, as shown in the attached figure. Figure 2 and Figure 4 As shown in the attached diagram, after the front cover 1 is fitted onto the end face of the rear shell 2, the end face of the front cover 1 closes the annular groove 21 and forms a relatively sealed isolation cavity 3, which serves as part of the sealing structure. Of course, as in traditional methods, a sealing ring, i.e., an end face sealing ring 8, is also provided on the end face. Thus, the isolation cavity 3 effectively forms two annular sections on the end face, as shown in the attached diagram. Figure 4 As shown, a double-layer sealing structure can be constructed using the sealing ring, and the end face sealing ring 8 of the inner ring 23 will not be in direct contact with the outside, which can improve its service life and the reliability of the structure.

[0060] Furthermore, in the housing structure of the present invention, the inner ring 23 and the outer ring do not have a height difference of L1. The end face sealing ring 8 used in the outer ring 22 is an elastic sealing gasket with a static height of H0 and a height of H1 after compression. The maximum deformation is X (ensuring that the inner ring 23 first fits against the end face of the front cover 1), and satisfies H0 > H1 ≥ H0 - X, L1 = H1. The end face sealing ring 8 of the inner ring 23 is an embedded sealing ring. The sealing ring is higher than the end face in a static state, and is flush with the end face of the inner ring 23 after being squeezed by the front cover 1.

[0061] Furthermore, the isolation chamber 3 can be further designed to enhance its sealing performance and resistance to refrigerant leakage, depending on the specific needs. Preferably, the isolation chamber 3 is configured as a vacuum or filled with refrigerant inhibitors.

[0062] Specifically, for refrigerants with flammable properties, a refrigerant inhibitor (gas) can be injected into the isolation chamber 3. Taking R290 (propane) refrigerant as an example, the refrigerant inhibitor can be CO2 or R1311 (trifluoroiodomethane). The refrigerant inhibitor mixes with the refrigerant before it leaks to the outside, effectively reducing the critical peak pressure and explosion index of flammable and explosive refrigerants. Due to the existence of the isolation chamber 3, even if the refrigerant leaks, it will not leak directly to the outside immediately, but will mix with the refrigerant inhibitor in the isolation chamber 3, reducing its potential explosive properties and effectively reducing safety risks.

[0063] Alternatively, the isolation chamber 3 can be constructed as a vacuum structure. The vacuum-state isolation chamber 3 primarily prevents direct refrigerant leakage by storing any refrigerant that is about to leak. The vacuum-state isolation chamber 3 has a certain storage space. When refrigerant leaks from the inner chamber 24 outwards, it first enters the isolation chamber 3, thus storing the refrigerant and preventing direct leakage to the outside. Furthermore, as long as the end face sealing ring 8 of the outer ring 22 is intact, the refrigerant will only reach the isolation chamber 3 and will not continue to leak. Even if the refrigerant continues to leak (due to the failure of the end face sealing ring 8 of the outer ring 22), the isolation chamber 3 can still act as a buffer, reducing the instantaneous flow rate of the refrigerant leak. This reduces the concentration of refrigerant in the air near the casing at the same time, preventing the refrigerant concentration from reaching the concentration required for combustion and explosion. For example, R290 refrigerant requires a concentration of 2.5% to 8.9% in the air to cause combustion and explosion. Therefore, reducing the instantaneous flow rate of the refrigerant leak can reduce its instantaneous concentration in the air, and after the refrigerant diffuses in the air, the concentration further decreases, effectively preventing combustion and explosion.

[0064] Meanwhile, the buffering effect of the isolation chamber 3 during the refrigerant leakage process is not only reflected in reducing the instantaneous concentration, but also in using its internal space to buffer the refrigerant, reducing the pressure when the refrigerant leaks to the outside, thus reducing the impact of the refrigerant on the shell, thereby reducing the intensity of the shell vibration caused by the refrigerant leakage. The reduction of vibration intensity can prevent excessive vibration from further causing deformation and damage to the sealing structure, which would lead to a further expansion of the leakage scale.

[0065] It should be noted that the technical advantage of the isolation chamber 3 mentioned above, namely the buffering effect when refrigerant leaks, is not only present in the isolation chamber 3 under vacuum, but is an advantage of the structure of the isolation chamber 3 itself. The existence of the isolation chamber 3 can bring about this technical effect, so the isolation chamber 3 under normal pressure has the same technical effect.

[0066] Preferably, the pressure P2 of the refrigerant inhibitor injected into the isolation chamber 33 satisfies: P3≤P2≤P1; where P1 is the minimum pressure in the inner cavity 24 of the housing when the compressor is running, and P3 is the external environmental pressure.

[0067] Specifically, during compressor operation, the pressure inside the casing is higher than the external ambient pressure, resulting in a significant pressure difference. This pressure difference creates a driving force for the refrigerant inside the casing to leak to the outside. Based on the isolation chamber 3 structure proposed in this invention, a refrigerant inhibitor with a certain pressure is injected into the isolation chamber 3. This transforms the original pressure difference between the inner cavity 24 and the external environment into a pressure difference between the inner cavity 24 and the isolation chamber 3. By using the controllable pressure of the isolation chamber 3 to replace the uncontrollable external ambient pressure, and by establishing an intermediate value between the pressure of the inner cavity 24 and the external ambient pressure based on the structural design, the pressure difference directly acting on the refrigerant inside the inner cavity 24 at the first moment is effectively reduced. This reduces the driving force for refrigerant leakage to the outside, thus reducing the force acting on the sealing structure and ultimately reducing the probability of refrigerant leakage.

[0068] Furthermore, a first channel 4 is provided on the rear shell 2, which is connected to the annular groove 21. A vent connector 6 is fitted inside the first channel 4. The vent connector 6 can evacuate and / or inject refrigerant inhibitor into the isolation cavity 3 formed by the annular groove 21.

[0069] Specifically, as shown in the attached diagram. Figure 1 , Figure 2 and Figure 4 As shown, the rear shell 2 is provided with a first channel 4 that is fitted with a vent connector 25. The vent connector 25 mainly serves to construct the vacuum environment of the isolation chamber 3 or to inject refrigerant inhibitors into the isolation chamber 3 during the assembly of the outer shell.

[0070] Furthermore, the rear shell 2 has an outer ring portion 22 and an inner ring portion 23 forming an annular groove 21, and the inner side of the inner ring portion 23 is the inner cavity 24 of the rear shell 2;

[0071] The first channel 4 is provided on the outer ring portion 22, and the inner ring portion 23 has a second channel 5 that corresponds to and is coaxial with the first channel 4. The isolation cavity 3 and the inner cavity 24 are connected through the second channel 5.

[0072] The vent connector 6 can move axially along the first channel 4 and the second channel 5 to control whether the vent end of the vent connector 6 enters or does not enter the second channel 5, so as to control whether the isolation chamber 3 and the inner cavity 24 are connected.

[0073] Specifically, as shown in the attached diagram. Figure 4 As shown, the isolation chamber 3 and the inner chamber 24 are structurally connected, that is, connected through the second channel 5. The second channel 5 corresponds to and is coaxial with the first channel 4. This allows the opening and closing of the second channel 5 to be controlled by adjusting the position of the vent connector 25, thus adapting to the needs of different assembly stages. Specifically:

[0074] In the first stage of assembly, after the front cover 1 and the rear shell 2 are closed, it is necessary to first evacuate the isolation cavity 3 and the inner cavity 24, as shown in the attached figure. Figure 6 As shown in the diagram, firstly, control the position of the vent connector 25 so that the vent end where the vent is located does not enter the second channel 5, i.e., the second channel 5 is open. At this time, the vent connector 25 can be used to evacuate the isolation chamber 3 and the inner chamber 24. After evacuation, subsequent operations are required according to the specific structure of the isolation chamber 3. If it is necessary to inject refrigerant inhibitor into the isolation chamber 3, then in the first stage, after evacuation, as shown in the attached diagram... Figure 6 In the state shown, refrigerant inhibitors are injected simultaneously into the isolation chamber 3 and the inner chamber 24 through the vent connector 25.

[0075] In the second stage of assembly, adjust the position of the vent connector 25 so that the vent end is connected to the second channel 5, as shown in the attached diagram. Figure 7 As shown, the second channel 5 is then closed, and the vent connector 25 is connected to the inner cavity 24 separately. At this time, the refrigerant inhibitor in the inner cavity 24 is extracted through the vent connector 25.

[0076] In the third stage of assembly, keep the vent connector 25 in the same position as shown in the attached diagram. Figure 8 As shown, refrigerant is then injected into the inner cavity 24 through the vent connector 25, thus completing the assembly of the outer casing and even the compressor. The vent connector 25 is fixed to the rear casing 2 with bolts, serving as the air intake connector during normal compressor operation.

[0077] Furthermore, for cases where it is not necessary to inject refrigerant inhibitors into isolation chamber 3, the second stage can be directly initiated after the vacuum is drawn in the first stage. The state of the second stage at this time is shown in the attached figure. Figure 8 As shown, refrigerant is injected directly into the inner cavity 24 through the vent connector 25.

[0078] Furthermore, the inner diameter of the first channel 4 is larger than the inner diameter of the second channel 5, and the vent connector 6 is a variable diameter structure. The vent connector 6 includes a first connector portion 61 and a second connector portion 62 whose radial dimensions are respectively matched with the first channel 4 and the second channel 5, and the venting end is the end of the second connector portion 62.

[0079] Specifically, as shown in the attached diagram. Figure 6 As shown, the radial dimension of the second connector is relatively reduced. This reduces the space occupied by the second connector in the isolation cavity 3 and avoids obstructing the circumferential flow path of the isolation cavity 3. Furthermore, the variable diameter design of the first and second connectors ensures that the sealing surfaces between the first connector and the first channel 4 and between the second connector and the second channel 5 are not on the same plane, thus improving sealing performance.

[0080] Furthermore, at least one of the two channels is provided with a vent sealing ring 7 on the inner wall of the first channel 4, and at least one of the vent connectors 6 is provided with a vent sealing ring 7 on the outer surface at the venting end. The vent sealing ring 7 is used to seal the gap between the channel and the vent connector 6.

[0081] Specifically, as shown in the attached diagram. Figure 4 As shown, at least two vent sealing rings 7 are used to form a sealing structure with the first channel 4 and the second channel 5, respectively. Furthermore, as shown in the attached figure… Figure 5 As shown, in the relative dimensions of the channel and the vent connector 25, the effective sealing distance from the outer end face of the first channel 4 to the vent sealing ring 7 therein is S1, the effective circular length of the second channel 5 is S2, the distance from the outer end face of the first channel 4 to the outer end face of the second channel 5 is S3, and the effective sealing area length of the vent sealing ring 7 inside the first channel 4 is S4. The length of the first connector is Q1, the length of the second connector is Q2, the distance from the end face of the second connector to the effective sealing area of ​​the vent sealing ring 7 thereon is Q3, and the effective sealing area length of the vent sealing ring 7 thereon is Q4; where Q1 + Q2 - Q3 ≥ S3.

[0082] During the assembly process, the position of the vent connector 25 meets the following conditions: in the first stage of assembly, Q2 does not contact S2, and S1 is within the range of Q1; in the second and third stages of assembly, S1 is within the range of Q1, and Q4 is within the range of S2.

[0083] Furthermore, the rear cover 2 has multiple circumferentially distributed fastening grooves 211 at the bottom of the annular groove 21, and the front cover 1 has multiple circumferentially distributed assembly holes on its edge. The assembly holes and fastening grooves 211 can cooperate with fasteners to connect the front cover 1 and the rear cover 2.

[0084] Specifically, as shown in the attached diagram. Figure 1 and Figure 4 As shown, the fastener's point of force directly corresponds to the annular groove 21, which can improve the sealing performance of the annular groove 21. At the same time, it applies compressive force to the end face sealing rings 8 of the outer ring 22 and the inner ring 23, making the inner and outer sealing rings bear force evenly and improving the reliability of the sealing structure.

[0085] Preferably, the diameters of the assembly hole and the fastening groove 211 are both smaller than the width of the annular groove 21, so as to avoid obstructing the flow path of the annular groove 21 in the circumferential direction, thereby avoiding the need for vacuuming or injecting refrigerant inhibitors into the isolation cavity 3 formed by the annular groove 21.

[0086] Furthermore, the front cover 1 is provided with an exhaust connector 11 that communicates with its interior. After the front cover 1 and the rear cover 2 are assembled, the exhaust connector 11 communicates with the inner cavity 24 of the rear cover 2. The exhaust connector 11 is used for exhausting the compressor during normal operation.

[0087] Example 2

[0088] Embodiments of the present invention provide a housing assembly method, mainly for structures in which the isolation cavity is not in communication with the inner cavity. The assembly method includes:

[0089] Step S100: Assemble the front cover of the housing onto the rear cover, so that the front cover is fastened to the end face of the rear cover and closes the annular groove on the end face of the rear cover to form an isolation cavity;

[0090] Step S200: Evacuate the isolation chamber to a vacuum state through the first channel on the rear shell that communicates with the isolation chamber, using the vent connector in the first channel;

[0091] Step S210: Inject refrigerant inhibitor into the isolation chamber using the vent connector.

[0092] Step S300: Inject refrigerant into the inner cavity of the rear shell.

[0093] Specifically, in this embodiment, the isolation chamber may not be connected to the inner cavity. Thus, the vacuum extraction of the isolation chamber and the subsequent injection of refrigerant inhibitors are performed separately, without affecting the vacuum extraction and refrigerant injection of the inner cavity. The two cavities operate independently.

[0094] Example 3

[0095] Embodiments of the present invention provide a housing assembly method, mainly for structures that communicate between an isolation cavity and an inner cavity, the assembly method comprising:

[0096] Step S100: Assemble the front cover of the housing onto the rear cover, so that the front cover is fastened to the end face of the rear cover and closes the annular groove on the end face of the rear cover to form an isolation cavity;

[0097] Step S200: Evacuate the isolation chamber to a vacuum state through the first channel on the rear shell that communicates with the isolation chamber, using the vent connector in the first channel;

[0098] Step S210: Position the vent connector so that its vent end does not enter the second channel connecting the isolation chamber and the inner cavity, thus maintaining communication between the isolation chamber and the inner cavity through the second channel;

[0099] Step S220: Use the vent connector to simultaneously evacuate the isolation chamber and the inner chamber to a vacuum state;

[0100] Step S221: Inject refrigerant inhibitors into the isolation chamber and the inner chamber simultaneously using the vent connector;

[0101] Step S230: Position the vent connector so that its vent end enters the second channel, and maintain a sealed contact between the vent end and the inner wall of the second channel.

[0102] Step S300: Use the vent connector to extract the refrigerant inhibitor from the inner cavity, and then use the vent connector to inject refrigerant into the inner cavity.

[0103] Specifically, in the first stage of assembly, after the front cover and rear shell are closed, it is necessary to first evacuate the isolation cavity and inner cavity, as shown in the attached diagram. Figure 6 As shown in the attached diagram, firstly, control the position of the vent connector so that the vent end does not enter the second channel, i.e., the second channel is open. At this point, the vent connector can be used to evacuate the isolation chamber and the inner cavity. In the first stage, after evacuation, as shown in the attached diagram... Figure 6 In the state shown, refrigerant inhibitors are injected simultaneously into the isolation chamber and the inner chamber directly through the vent connector.

[0104] In the second stage of assembly, adjust the position of the vent connector so that the vent end is connected to the second channel, as shown in the attached diagram. Figure 7 As shown, the second channel is then closed, and the vent connector is connected to the inner cavity separately. At this time, the refrigerant inhibitor in the inner cavity is extracted through the vent connector.

[0105] In the third stage of assembly, keep the vent connector in the same position as shown in the attached diagram. Figure 8 As shown, refrigerant is then injected into the inner cavity through the vent connector, completing the assembly of the outer casing and even the compressor. The vent connector is fixed to the rear casing with bolts and serves as the air intake connector for normal compressor operation.

[0106] Furthermore, for cases where it is not necessary to inject refrigerant inhibitors into the isolation chamber, the second stage can be directly initiated after the vacuum is drawn in the first stage. The state of the second stage at this time is shown in the attached figure. Figure 8 As shown, refrigerant is injected directly into the inner cavity through the vent connector.

[0107] Example 4

[0108] An embodiment of the present invention provides a compressor that includes the aforementioned housing, thereby possessing all the technical effects described herein.

[0109] In the description of this invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., 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 invention 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. Therefore, they should not be construed as limitations on this invention.

[0110] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A housing, characterized in that, include: Front cover; as well as The rear housing has an annular groove extending circumferentially on its end face; The front cover can be fitted onto the end face of the rear shell to close the annular groove and form an isolation cavity; The isolation chamber is configured as a vacuum or the isolation chamber is filled with a refrigerant inhibitor; The rear shell has a first channel that connects to the annular groove. A vent connector is fitted in the first channel. The vent connector can evacuate and / or inject refrigerant inhibitor into the isolation cavity formed by the annular groove. The rear shell has an outer ring portion and an inner ring portion that form the annular groove, and the inner side of the inner ring portion is the inner cavity of the rear shell; The first channel is disposed on the outer ring portion, and the inner ring portion has a second channel corresponding to and coaxial with the first channel, and the isolation cavity is connected to the inner cavity through the second channel; The vent connector can move axially along the first channel and the second channel to control whether the vent end of the vent connector enters or does not enter the second channel, thereby controlling whether the isolation cavity is connected to the inner cavity.

2. The housing according to claim 1, characterized in that, The inner diameter of the first channel is larger than the inner diameter of the second channel. The vent connector is a variable diameter structure. The vent connector includes a first connector portion and a second connector portion whose radial dimensions are respectively matched with the first channel and the second channel. The vent end is the end of the second connector portion.

3. The housing according to claim 1 or 2, characterized in that, At least one of the two channels is provided with a vent sealing ring on the inner wall of the first channel, and at least one vent sealing ring is provided on the outer surface of the vent connector at the vent end. The vent sealing ring is used to seal the gap between the channel and the vent connector.

4. The housing according to claim 1, characterized in that, The rear shell has an outer ring portion and an inner ring portion that form the annular groove, and an end face sealing ring is provided on the end face of both the outer ring portion and the inner ring portion.

5. The housing according to claim 1 or 4, characterized in that, The rear cover has multiple circumferentially distributed fastening grooves at the bottom of the annular groove, and the front cover has multiple circumferentially distributed assembly holes on its edge. The assembly holes and the fastening grooves can cooperate with fasteners to connect the front cover and the rear cover.

6. The housing according to claim 5, characterized in that, The diameters of both the assembly hole and the fastening groove are smaller than the width of the annular groove.

7. The housing according to claim 1, characterized in that, The front cover is provided with an exhaust connector that communicates with its interior. After the front cover and the rear cover are assembled, the exhaust connector communicates with the inner cavity of the rear cover.

8. The housing according to claim 1, characterized in that, The pressure P2 of the refrigerant inhibitor injected into the isolation cavity satisfies: P3≤P2≤P1; where P1 is the minimum pressure in the inner cavity of the housing when the compressor is running, and P3 is the external ambient pressure.

9. A method for assembling a housing, characterized in that, It is used to assemble the housing according to any one of claims 1-8, and the housing assembly method includes: The front cover of the housing is assembled to the rear cover, so that the front cover is fastened to the end face of the rear cover and closes the annular groove on the end face of the rear cover to form an isolation cavity; The isolation chamber is evacuated to a vacuum state through a first channel on the rear shell that communicates with the isolation chamber, using a vent connector in the first channel. Refrigerant is injected into the inner cavity of the rear shell; The vent connector is positioned so that its venting end does not enter the second channel connecting the isolation chamber and the inner cavity, thus maintaining communication between the isolation chamber and the inner cavity through the second channel; The isolation chamber and the inner chamber are simultaneously evacuated to a vacuum state using the vent connector. Position the vent connector so that its vent end enters the second channel, and maintain a sealed contact between the vent end and the inner wall of the second channel, and inject refrigerant into the inner cavity using the vent connector.

10. The housing assembly method according to claim 9, characterized in that, After evacuating the isolation chamber to a vacuum state using the vent connector in the first channel, the method further includes: The refrigerant inhibitor is injected into the isolation chamber using the vent connector.

11. The housing assembly method according to claim 9, characterized in that, After simultaneously evacuating the isolation chamber and the inner chamber to a vacuum state using the vent connector, the method further includes: Refrigerant inhibitors are simultaneously injected into the isolation chamber and the inner chamber using the vent connector; The vent connector is positioned so that its vent end enters the second channel, and the vent end remains in sealed contact with the inner wall of the second channel. The refrigerant inhibitor in the inner cavity is extracted using the vent connector, and then refrigerant is injected into the inner cavity using the vent connector.

12. A compressor, characterized in that, Includes the housing as described in any one of claims 1 to 8.

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