Pump body assembly, scroll compressor and air conditioner

Abstract

The utility model provides a pump body assembly, scroll compressor and air conditioner, the pump body assembly is used for scroll compressor, scroll compressor includes oil pool, pump body assembly includes: pump body and valve body assembly, the pump body is provided with liquid inlet, liquid outlet and pressure relief opening, liquid outlet and pressure relief opening are both communicated with liquid inlet. The valve body assembly is connected with the pump body, the valve body assembly closes the pressure relief opening under the condition that the operation frequency of the scroll compressor is smaller than the preset frequency, and the valve body assembly opens the pressure relief opening under the condition that the operation frequency of the scroll compressor is larger than or equal to the preset frequency, so that the pressure relief opening communicates with the oil pool. When the scroll compressor operates at high frequency, a part of oil is discharged to the oil pool through the pressure relief opening, so that the oil feeding amount of the scroll compressor can be reduced, and the oil spitting rate of the scroll compressor during high-frequency operation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a pump body assembly, a scroll compressor and an air conditioner. Background Art

[0002] When the compressor operates at high frequency, the gear pump connected to the crankshaft will increase its oil supply as the speed increases, resulting in an increase in the total oil amount in the crankshaft, which in turn increases the oil discharge rate of the compressor.

[0003] An increase in the oil discharge rate will lead to increased wear of mechanical parts due to reduced lubrication, and will also cause problems such as low operating efficiency, increased energy consumption, and decreased heat exchange. Utility Model Content

[0004] The utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0005] In view of this, the present invention proposes a pump body assembly, which is used for a scroll compressor. The scroll compressor includes an oil pool. The pump body assembly includes: a pump body, which is provided with a liquid inlet, a liquid discharge port and a pressure relief port, and the liquid discharge port and the pressure relief port are both connected to the liquid inlet; a valve body assembly, which is connected to the pump body. When the operating frequency of the scroll compressor is less than a preset frequency, the valve body assembly closes the pressure relief port. When the operating frequency of the scroll compressor is greater than or equal to the preset frequency, the valve body assembly opens the pressure relief port to connect the pressure relief port to the oil pool.

[0006] The pump body is provided with a liquid inlet and a liquid discharge port, which are located on both sides of the pump body respectively. The liquid inlet is used to inhale liquid, and the liquid discharge port is used to discharge liquid. The size and position of the liquid inlet and the liquid discharge port can be designed according to specific application requirements.

[0007] The pump body is also provided with a pressure relief port. When the pressure relief port is in the open state, part of the liquid entering the pump body can be discharged through the pressure relief port. When the pressure relief port is in the closed state, the liquid entering the pump body is only discharged through the drain port.

[0008] The scroll compressor can operate at medium and low frequencies, and can also operate at high frequencies. In this solution, the preset frequency is used as the critical value of medium, low and high frequencies for illustration. When the operating frequency of the scroll compressor is less than the preset frequency, it means that the operating frequency of the scroll compressor is low. At this time, the valve body assembly closes the pressure relief port. At this time, the pump body assembly fills oil from the oil pool. The oil is compressed by the pump body assembly and the oil is sent to the oiling port of the bearing in the scroll compressor through the drain port. When the operating frequency of the scroll compressor is greater than or equal to the preset frequency, it means that the operating frequency of the scroll compressor is high. At this time, the valve body assembly opens the pressure relief port. The pump body assembly fills oil from the oil pool. The oil is compressed by the pump body assembly. A part of the oil is sent to the oiling port of the bearing in the scroll compressor through the drain port. At the same time, a part of the oil returns the excess oil to the oil pool through the pressure relief port.

[0009] When the scroll compressor is running at high frequency, a portion of the oil is discharged to the oil pool through the pressure relief port, which can reduce the amount of oil supplied to the scroll compressor, thereby reducing the oil discharge rate of the scroll compressor when running at high frequency.

[0010] While reducing the oil discharge rate of the scroll compressor during high-frequency operation, the following advantages can be achieved:

[0011] First, the lubricating oil inside the compressor is not easy to reduce, which avoids the increase of friction between mechanical parts, thereby reducing the wear rate of mechanical parts and extending the service life of the scroll compressor.

[0012] Second, since the lubricating oil is not easy to reduce, the operating efficiency of the scroll compressor is prevented from decreasing, thereby preventing the increase in energy consumption and reducing the operating cost of the scroll compressor.

[0013] Third, the spitted oil is not easy to enter the refrigeration system or gas delivery system, avoiding oil contamination of refrigerant or gas and ensuring the normal operation of the system.

[0014] Fourth, when oil enters the condenser or evaporator, an oil film will form on the surface of the heat exchanger, reducing the heat exchange efficiency and affecting the refrigeration effect. By reducing the oil discharge rate of the scroll compressor during high-frequency operation, oil can be prevented from entering the condenser or evaporator, thereby avoiding the above problems.

[0015] Fifth, if the expelled oil is not effectively recovered, it may leak into the environment and cause environmental pollution, especially in industries with high environmental requirements such as food and medicine, where the impact is more serious. By reducing the oil discharge rate of the scroll compressor during high-frequency operation, the above problems can be avoided.

[0016] Sixth, with the above five advantages, the system does not require frequent maintenance and overhaul, reducing the maintenance cost and downtime of the scroll compressor.

[0017] In addition, the pump assembly according to the above technical solution provided by the present invention may also have the following additional technical features:

[0018] In some technical solutions, optionally, the pump body includes: a housing, with a liquid inlet provided on the housing; a driven gear located in the housing, with a mounting hole provided on the driven gear; a driving gear extending into the mounting hole, the driving gear being used to drive the driven gear to rotate, the driving gear and the driven gear being used to suck the oil into the housing, a gap for the oil to circulate is formed between the driving gear and the driven gear, and the discharge port is connected to the liquid inlet through the gap; a bearing being used to support the driving gear; an end cover being connected to the end of the bearing, with a pressure relief port provided on the end cover, and the pressure relief port being connected to the gap.

[0019] The housing provides a working space for the driving gear and the driven gear, and is used to protect them. The driving gear is driven by the motor in the scroll compressor, and the driven gear meshes with the driving gear. When the driving gear and the driven gear rotate, suction is generated, which draws oil between the driving gear and the driven gear through the inlet. The oil is then squeezed into the oil cavity of the housing through the meshing of the driving gear and the driven gear. The oil in the oil cavity is discharged outward through the drain port. The driving gear is provided with an axial hole for mounting a bearing. The axial hole is usually connected to the oil cavity, and one axial end of the axial hole is used as a drain port to realize the oil discharge function.

[0020] The end cap is installed at the end of the bearing and is used to seal the internal cavity of the housing to prevent oil leakage. A pressure relief port is provided on the end cap, facing the gap between the driving gear and the driven gear. When the operating frequency of the scroll compressor is greater than or equal to the preset frequency, a portion of the oil between the driving gear and the driven gear is directly discharged through the pressure relief port, allowing some oil to fall back into the oil pool, reducing the oil discharge rate of the scroll compressor.

[0021] In some technical solutions, optionally, the valve body assembly includes: an elastic valve plate. When the operating frequency of the scroll compressor is less than a preset frequency, the elastic valve plate is attached to the pump body, and the elastic valve plate closes the pressure relief port. When the operating frequency of the scroll compressor is greater than or equal to the preset frequency, the elastic valve plate is in a deformed state, and the elastic valve plate opens the pressure relief port.

[0022] The elastic valve disc is mounted on the pump body, specifically on the end cap in this solution. The elastic valve disc is flexible and, when pushed, deforms relative to the end cap, thereby opening the pressure relief vent. When the push stops, the elastic valve disc returns to its original shape, closing the pressure relief vent again.

[0023] During the operation of the scroll compressor, the oil between the driving gear and the driven gear tends to push the elastic valve disc. When the scroll compressor's operating frequency is low, the oil's pushing force on the elastic valve disc is less than the elastic force of the elastic valve disc, and the elastic valve disc remains closed to the pressure relief port. When the scroll compressor's operating frequency is greater than or equal to the preset frequency, the oil's pushing force on the elastic valve disc is greater than the elastic force of the elastic valve disc, causing the elastic valve disc to deform, opening the pressure relief port. A portion of the oil passes through the port and falls back into the oil pool. The elastic valve disc can automatically open and close the pressure relief port under the action of elasticity, making the valve body assembly simple in structure and easy to manufacture, which helps reduce the processing cost of the valve body assembly.

[0024] In some technical solutions, optionally, the elastic valve plate includes: a mounting portion connected to the pump body; a valve body portion, which is used to open or close the pressure relief port; and a connecting portion, which is used to connect the valve body portion and the mounting portion, and the width of the connecting portion is smaller than the width of the valve body portion.

[0025] The mounting portion is connected to the pump body so that the elastic valve plate is fixed on the pump body. The elastic valve plate is not easily separated from the pump body, ensuring that the elastic valve plate can stably open or close the pressure relief port.

[0026] The valve body is directly opposite the pressure relief port, allowing it to open or close the pressure relief port. The connecting portion connects the valve body to the mounting portion. When the valve body is driven by oil, the connecting portion deforms, thereby raising the valve body above the pump body. In this solution, the width of the connecting portion is smaller than the width of the valve body. When the connecting portion is narrow, the elastic valve plate is more likely to deform. When the operating frequency of the scroll compressor is greater than or equal to the preset frequency, the connecting portion is ensured to deform, thereby allowing the valve body to stably open the pressure relief port.

[0027] The width of the connection part can be designed according to the preset frequency. When the preset frequency is larger, the width of the connection part is larger, and the difficulty of the connection part to deform is greater. Similarly, when the preset frequency is smaller, the width of the connection part is smaller, thereby ensuring that the connection part can be deformed under a smaller driving force.

[0028] In some technical solutions, optionally, the valve body assembly further includes: a valve plate baffle connected to the pump body, and the valve plate baffle is used to limit the maximum deformation of the elastic valve plate.

[0029] The valve baffle is installed on the pump body, and at least a part of the valve baffle is located on the side of the elastic valve disc away from the pump body. When the elastic valve disc is deformed to a certain extent, the elastic valve disc rests on the valve baffle, and the valve baffle limits the elastic valve disc, so that the elastic valve disc cannot be further limited. The valve baffle limits the maximum deformation of the elastic valve disc, thereby preventing the elastic valve disc from being unable to return to its original state due to excessive deformation, and ensuring that the elastic valve disc can stably open or close the pressure relief port.

[0030] In some technical solutions, optionally, the elastic valve plate and / or the valve plate baffle are detachably connected to the pump body.

[0031] As the elastic valve plate is used for a longer time, its deformation ability will decrease, and it is easy for the elastic valve plate to fail to tightly close the pressure relief port and fail to accurately reset. Therefore, the elastic valve plate is set to be detachable and can be replaced to ensure that the elastic valve plate can stably open or close the pressure relief port.

[0032] The elastic force of the elastic valve plate is related to the preset frequency. For example, if the preset frequency needs to be increased, an elastic valve plate with greater elastic force can be replaced so that the elastic valve plate will only deform when the operating frequency of the scroll compressor reaches a larger preset frequency, thereby meeting the usage requirements in different scenarios.

[0033] Similarly, the valve baffle is configured to be detachable, so that if the valve baffle is damaged, the valve baffle can be replaced.

[0034] The valve baffle is used to limit the maximum deformation of the elastic valve disc. The maximum deformation of the elastic valve disc will affect the discharge speed of the pressure relief port. The limit on the maximum deformation of the elastic valve disc can be adjusted by replacing the valve baffle, so that the discharge speed of the pressure relief port can be adjusted according to needs.

[0035] In some technical solutions, optionally, the valve body assembly includes: a sensor, which is used to collect the operating frequency of the scroll compressor; a switch element, which is connected to the pump body and electrically connected to the sensor. When the sensor collects that the operating frequency of the scroll compressor is less than a preset frequency, the switch element closes the pressure relief port; when the sensor collects that the operating frequency of the scroll compressor is greater than or equal to the preset frequency, the switch element opens the pressure relief port.

[0036] The sensor can detect the operating frequency of the scroll compressor. When the value collected by the sensor indicates that the operating frequency of the scroll compressor is less than the preset frequency, the switch does not need to be operated, and the switch remains in the closed state of the pressure relief port. When the value collected by the sensor indicates that the operating frequency of the scroll compressor is greater than or equal to the preset frequency, the sensor controls the switch to operate through the controller, causing it to open the pressure relief port, and some oil flows through the pressure relief port and falls back into the oil pool.

[0037] Through the cooperation between the sensor and the switch, the opening timing of the pressure relief port can be accurately achieved, thereby ensuring the oil discharge stability of the pressure relief port.

[0038] In some technical solutions, optionally, the preset frequency set in the sensor can be adjusted.

[0039] A preset frequency can be set in the sensor, which then compares the collected operating frequency with the preset frequency. If the preset frequency needs to be increased, the sensor data can be rewritten so that at a higher preset frequency, the sensor controls the switch via the controller. Similarly, the sensor data can be rewritten so that at a lower preset frequency, the sensor controls the switch via the controller, increasing the flexibility of the valve assembly.

[0040] In a second aspect, the present invention provides a scroll compressor, comprising the pump body assembly as in the first aspect.

[0041] In a third aspect, the present invention provides an air conditioner, comprising the scroll compressor in the second aspect.

[0042] Additional aspects and advantages of the present invention will become apparent in the following description or will be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0044] Figure 1 A schematic structural diagram of a pump assembly in an embodiment of the present utility model is shown;

[0045] Figure 2 A schematic structural diagram of a pump assembly in an embodiment of the present utility model is shown;

[0046] Figure 3 An exploded view of a pump assembly in an embodiment of the present invention is shown;

[0047] Figure 4 A schematic structural diagram of a pump assembly in an embodiment of the present utility model is shown;

[0048] Figure 5 A schematic structural diagram of an elastic valve plate in an embodiment of the present utility model is shown;

[0049] Figure 6 The figure shows a schematic structural diagram of the sensor and the switch in the embodiment of the present invention;

[0050] Figure 7 The schematic diagram of the structure of the scroll compressor in the embodiment of the present utility model is shown.

[0051] Reference numerals:

[0052] 100 Pump body assembly, 110 Pump body, 111 Liquid inlet, 112 Liquid discharge port, 113 Pressure relief port, 114 Housing, 115 Driven gear, 1151 Mounting hole, 116 Driving gear, 117 Bearing, 118 End cover, 120 Valve body assembly, 121 Elastic valve disc, 122 Mounting portion, 123 Valve body portion, 124 Connecting portion, 125 Valve disc baffle, 126 Sensor, 127 Switch component, 128 Locking component, 129 Shaft hole, 130 Upper oil chamber, 140 Oil discharge chamber, 150 Gap, 200 Scroll compressor, 210 Orbiting scroll, 220 Stationary scroll, 230 Crankshaft, 240 Motor, 250 Oil sump. DETAILED DESCRIPTION

[0053] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0054] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0055] Refer to the following Figures 1 to 7 The present invention describes a pump assembly, a scroll compressor, and an air conditioner according to some embodiments of the present invention.

[0056] Combine Figure 1 、 Figure 2 、 Figure 3 and Figure 7 As shown, in an embodiment of the present invention, a pump body assembly 100 is proposed. The pump body assembly 100 is used for a scroll compressor 200. The scroll compressor 200 includes an oil pool 250. The pump body assembly 100 includes: a pump body 110 and a valve body assembly 120. The pump body 110 is provided with a liquid inlet 111, a liquid discharge port 112 and a pressure relief port 113. The liquid discharge port 112 and the pressure relief port 113 are both connected to the liquid inlet 111. The valve body assembly 120 is connected to the pump body 110. When the operating frequency of the scroll compressor 200 is less than a preset frequency, the valve body assembly 120 closes the pressure relief port 113. When the operating frequency of the scroll compressor 200 is greater than or equal to the preset frequency, the valve body assembly 120 opens the pressure relief port 113 to connect the pressure relief port 113 to the oil pool 250.

[0057] A liquid inlet 111 and a liquid discharge port 112 are provided on the pump body 110. The liquid inlet 111 and the liquid discharge port 112 are respectively located on both sides of the pump body 110. The liquid inlet 111 is used to inhale liquid, and the liquid discharge port 112 is used to discharge liquid. The size and position of the liquid inlet 111 and the liquid discharge port 112 can be designed according to specific application requirements.

[0058] The pump body 110 is also provided with a pressure relief port 113. When the pressure relief port 113 is in an open state, a portion of the liquid entering the pump body 110 can be discharged through the pressure relief port 113. When the pressure relief port 113 is in a closed state, the liquid entering the pump body 110 is only discharged through the drain port 112.

[0059] The scroll compressor 200 can operate at medium and low frequencies, and can also operate at high frequencies. In this embodiment, a preset frequency is used as the threshold between medium and low frequencies and high frequencies for illustration. When the operating frequency of the scroll compressor 200 is less than the preset frequency, indicating that the operating frequency of the scroll compressor 200 is low, the valve body assembly 120 closes the pressure relief port 113, and the pump body assembly 100 fills the oil tank 250 with oil. The oil is compressed by the pump body assembly 100 and delivered to the oil filling port of the bearing 117 in the scroll compressor 200 through the discharge port 112. When the operating frequency of the scroll compressor 200 is greater than or equal to the preset frequency, it means that the operating frequency of the scroll compressor 200 is relatively high. At this time, the valve body assembly 120 opens the pressure relief port 113, and the pump body assembly 100 fills oil from the oil pool 250. The oil is compressed by the pump body assembly 100, and a part of the oil is sent to the oil filling port of the bearing 117 in the scroll compressor 200 through the discharge port 112. At the same time, a part of the oil returns the excess oil to the oil pool 250 through the pressure relief port 113.

[0060] When the scroll compressor 200 operates at high frequency, a portion of the oil is discharged to the oil pool 250 through the pressure relief port 113 , which can reduce the oil supply amount of the scroll compressor 200 and thus reduce the oil discharge rate of the scroll compressor 200 during high frequency operation.

[0061] When the oil discharge rate of the scroll compressor 200 is reduced during high-frequency operation, the following advantages can be achieved:

[0062] First, the lubricating oil inside the compressor is not easily reduced, which avoids the increase of friction between mechanical parts, thereby reducing the wear rate of the mechanical parts and extending the service life of the scroll compressor 200.

[0063] Second, since the lubricating oil is not easily reduced, the operating efficiency of the scroll compressor 200 is prevented from decreasing, thereby preventing an increase in energy consumption and reducing the operating cost of the scroll compressor 200.

[0064] Third, the spitted oil is not easy to enter the refrigeration system or gas delivery system, avoiding oil contamination of refrigerant or gas and ensuring the normal operation of the system.

[0065] Fourth, when oil enters the condenser or evaporator, an oil film will be formed on the surface of the heat exchanger, reducing the heat exchange efficiency and affecting the refrigeration effect. By reducing the oil discharge rate of the scroll compressor 200 during high-frequency operation, oil can be prevented from entering the condenser or evaporator, thereby avoiding the above-mentioned problem.

[0066] Fifth, if the expelled oil is not effectively recovered, it may leak into the environment and cause environmental pollution, especially in industries with high environmental requirements such as food and medicine, where the impact is more serious. By reducing the oil expelling rate of the scroll compressor 200 during high-frequency operation, the above problem can be avoided.

[0067] Sixth, with the above five advantages, the system does not require frequent maintenance and overhaul, thus reducing the maintenance cost and downtime of the scroll compressor 200 .

[0068] Combine Figure 2 、 Figure 3 and Figure 4 As shown, in some technical solutions, the pump body 110 optionally includes: a housing 114, a driven gear 115, a driving gear 116, a bearing 117, and an end cover 118. The liquid inlet 111 is provided on the housing 114, and the driven gear 115 is located in the housing 114. The driven gear 115 is provided with a mounting hole 1151, and the driving gear 116 extends into the mounting hole 1151. The driving gear 116 is used to drive the driven gear 115 to rotate. The driving gear 116 and the driven gear 115 are used to draw oil into the housing 114. A gap 150 for oil circulation is formed between the driving gear 116 and the driven gear 115. The discharge port 112 is connected to the liquid inlet 111 through the gap 150. The bearing 117 is used to support the driving gear 116. The end cover 118 is connected to the end of the bearing 117. The end cover 118 is provided with a pressure relief port 113, which is connected to the gap 150.

[0069] The housing 114 provides a working space for the driving gear 116 and the driven gear 115 and is used to protect the driving gear 116 and the driven gear 115. The driving gear 116 is driven by the motor in the scroll compressor 200, and the driven gear 115 meshes with the driving gear 116. When the driving gear 116 and the driven gear 115 rotate, suction is generated, thereby sucking oil into the upper oil chamber 130 inside the housing 114 through the liquid inlet 111. The oil in the upper oil chamber 130 is sucked between the driving gear 116 and the driven gear 115, and the oil is squeezed into the oil discharge chamber 140 of the housing 114 through the meshing of the driving gear 116 and the driven gear 115. The oil in the oil discharge chamber 140 is discharged outward through the drain port 112. The driving gear 116 is provided with a shaft hole 129, in which the bearing 117 is installed. The shaft hole 129 is usually connected to the oil discharge chamber 140, and one axial end of the shaft hole 129 is used as the drain port 112 to realize the oil discharge function.

[0070] An end cap 118 is mounted on the end of the bearing 117 and is used to seal the internal cavity of the housing 114 to prevent oil leakage. A pressure relief port 113 is provided on the end cap 118, facing the gap between the driving gear 116 and the driven gear 115. When the operating frequency of the scroll compressor 200 is greater than or equal to a preset frequency, a portion of the oil between the driving gear 116 and the driven gear 115 is discharged directly through the pressure relief port 113, causing a portion of the oil to fall back into the oil pool 250 after passing through the end cap 118, thereby reducing the oil discharge rate of the scroll compressor 200.

[0071] The housing 114 is generally made of a metal material with high strength and wear resistance. There are two gear cavities inside the housing 114 for accommodating and supporting the rotation of the gears.

[0072] The driving gear 116 is connected to the motor via a rotating shaft. The bearing 117 is used to support and fix the rotating shaft to ensure the smooth rotation of the driving gear 116. The bearing 117 in this embodiment can be a rolling bearing 117 or a sliding bearing 117.

[0073] Combine Figure 1 and Figure 5 As shown, in some technical solutions, optionally, the valve body assembly 120 includes: an elastic valve plate 121. When the operating frequency of the scroll compressor 200 is less than a preset frequency, the elastic valve plate 121 is attached to the pump body 110, and the elastic valve plate 121 closes the pressure relief port 113. When the operating frequency of the scroll compressor 200 is greater than or equal to the preset frequency, the elastic valve plate 121 is in a deformed state, and the elastic valve plate 121 opens the pressure relief port 113.

[0074] The elastic valve disc 121 is mounted on the pump body 110, specifically on the end cap 118 in this embodiment. The elastic valve disc 121 is elastic. When the elastic valve disc 121 is pushed, the elastic valve disc 121 can deform relative to the end cap 118, thereby opening the pressure relief port 113. When the push of the elastic valve disc 121 is stopped, the elastic valve disc 121 returns to its original shape under the action of the elastic force, thereby closing the pressure relief port 113 again.

[0075] During the operation of the scroll compressor 200, the oil between the driving gear 116 and the driven gear 115 tends to push the elastic valve disc 121. When the operating frequency of the scroll compressor 200 is low, the driving force of the oil on the elastic valve disc 121 is less than the elastic force of the elastic valve disc 121. At this time, the elastic valve disc 121 remains in a closed state of the pressure relief port 113. When the operating frequency of the scroll compressor 200 is greater than or equal to the preset frequency, the driving force of the oil on the elastic valve disc 121 is greater than the elastic force of the elastic valve disc 121, thereby deforming the elastic valve disc 121. The elastic valve disc 121 opens the pressure relief port 113, and a portion of the oil falls back into the oil pool 250 after passing through the pressure relief port 113. The elastic valve disc 121 can automatically open or close the pressure relief port 113 under the action of elasticity, making the structure of the valve body assembly 120 simple and easy to process, which is conducive to reducing the processing cost of the valve body assembly 120.

[0076] In a possible application, the opening amplitude of the elastic valve disc 121 is determined by the material stiffness of the elastic valve disc 121 , the stroke of the valve disc baffle 125 , and the pressure difference between the inside and outside of the end cover 118 .

[0077] Combine Figure 1 and Figure 5 As shown, in some technical solutions, optionally, the elastic valve plate 121 includes: a mounting portion 122, a valve body portion 123 and a connecting portion 124, the mounting portion 122 is connected to the pump body 110, the valve body portion 123 is used to open or close the pressure relief port 113, and the connecting portion 124 is used to connect the valve body portion 123 and the mounting portion 122, and the width of the connecting portion 124 ( Figure 5 The arrow at W in the middle points to the width direction of the connecting portion 124 (which is smaller than the width of the valve body portion 123).

[0078] The mounting portion 122 is connected to the pump body 110 , so that the elastic valve disc 121 is fixed on the pump body 110 . The elastic valve disc 121 is not easily separated from the pump body 110 , ensuring that the elastic valve disc 121 can stably open or close the pressure relief port 113 .

[0079] The valve body 123 faces the pressure relief port 113, allowing the valve body 123 to open or close the pressure relief port 113. The connecting portion 124 is used to connect the valve body 123 and the mounting portion 122. When the valve body 123 is driven by oil, the connecting portion 124 deforms, thereby raising the valve body 123 above the pump body 110. In this embodiment, the width of the connecting portion 124 is smaller than the width of the valve body 123. When the width of the connecting portion 124 is small, the elastic valve plate 121 is easily deformed. When the operating frequency of the scroll compressor 200 is greater than or equal to the preset frequency, the connecting portion 124 is ensured to deform, thereby allowing the valve body 123 to stably open the pressure relief port 113.

[0080] The width of the connecting portion 124 can be designed according to a preset frequency. The larger the preset frequency, the larger the width of the connecting portion 124, and the more difficult it is for the connecting portion 124 to deform. Similarly, the smaller the preset frequency, the smaller the width of the connecting portion 124, thereby ensuring that the connecting portion 124 can be deformed under a smaller driving force.

[0081] In a possible application, the mounting portion 122 , the valve body portion 123 and the connecting portion 124 are an integrated structure.

[0082] like Figure 1 As shown, in some technical solutions, optionally, the valve body assembly 120 further includes: a valve plate baffle 125 , which is connected to the pump body 110 and is used to limit the maximum deformation of the elastic valve plate 121 .

[0083] The valve plate baffle 125 is installed on the pump body 110, and at least a part of the valve plate baffle 125 is located on the side of the elastic valve plate 121 away from the pump body 110. When the elastic valve plate 121 is deformed to a certain extent, the elastic valve plate 121 rests on the valve plate baffle 125, and the valve plate baffle 125 limits the elastic valve plate 121, so that the elastic valve plate 121 cannot be further limited. The valve plate baffle 125 limits the maximum deformation of the elastic valve plate 121, thereby preventing the elastic valve plate 121 from being unable to return to its original state due to excessive deformation, thereby ensuring that the elastic valve plate 121 can stably open or close the pressure relief port 113.

[0084] In a possible application, the valve body assembly 120 further includes a locking member 128 , which is used to lock the elastic valve disc 121 and the valve disc baffle 125 on the pump body 110 . For example, the locking member 128 is a screw or a pin.

[0085] In some technical solutions, optionally, the elastic valve plate 121 and / or the valve plate baffle 125 are detachably connected to the pump body 110 .

[0086] As the elastic valve plate 121 is used for a longer time, the deformation ability of the elastic valve plate 121 will decrease, and it is easy for the elastic valve plate 121 to fail to tightly close the pressure relief port 113 and fail to accurately reset. Therefore, the elastic valve plate 121 is set to be detachable and can be replaced to ensure that the elastic valve plate 121 can stably open or close the pressure relief port 113.

[0087] The elastic force of the elastic valve plate 121 is associated with the preset frequency. For example, if the preset frequency needs to be increased, the elastic valve plate 121 with greater elastic force can be replaced so that the elastic valve plate 121 will only deform when the operating frequency of the scroll compressor 200 reaches a larger preset frequency, thereby meeting the usage requirements in different scenarios.

[0088] Similarly, the valve baffle 125 is configured to be detachable, and in the event that the valve baffle 125 is damaged, the valve baffle 125 can be replaced.

[0089] The valve plate baffle 125 is used to limit the maximum deformation of the elastic valve plate 121. The maximum deformation of the elastic valve plate 121 will affect the discharge speed of the pressure relief port 113. The limit on the maximum deformation of the elastic valve plate 121 can be adjusted by replacing the valve plate baffle 125, so that the discharge speed of the pressure relief port 113 can be adjusted according to needs.

[0090] like Figure 6 As shown, in some technical solutions, optionally, the valve body assembly 120 includes: a sensor 126 and a switch element 127, the sensor 126 is used to collect the operating frequency of the scroll compressor 200, the switch element 127 is connected to the pump body 110, and the switch element 127 is electrically connected to the sensor 126. When the sensor 126 collects that the operating frequency of the scroll compressor 200 is less than a preset frequency, the switch element 127 closes the pressure relief port 113. When the sensor 126 collects that the operating frequency of the scroll compressor 200 is greater than or equal to the preset frequency, the switch element 127 opens the pressure relief port 113.

[0091] Sensor 126 can acquire the operating frequency of scroll compressor 200. When the value acquired by sensor 126 indicates that the operating frequency of scroll compressor 200 is less than a preset frequency, switch 127 does not need to be actuated, and switch 127 remains closed to pressure relief port 113. When the value acquired by sensor 126 indicates that the operating frequency of scroll compressor 200 is greater than or equal to the preset frequency, sensor 126 controls switch 127 via the controller to actuate, causing switch 127 to open pressure relief port 113, and a portion of the oil passes through pressure relief port 113 and falls back into oil pool 250.

[0092] By cooperating with the sensor 126 and the switch element 127 , the opening timing of the pressure relief port 113 can be accurately achieved, thereby ensuring the oil discharge stability of the pressure relief port 113 .

[0093] In this embodiment, the elastic valve plate 121 can be replaced with a sensor-type active switch. The sensor 126 senses the operating frequency of the scroll compressor 200. Under medium and low frequency conditions, the pressure relief port 113 is closed, and under high frequency conditions, the pressure relief port 113 is opened. The opening amplitude of the switch element 127 is controlled by the actuator, and the opening amplitude of the pressure relief port 113 can be accurately controlled.

[0094] Exemplarily, the switch element 127 may be a solenoid valve.

[0095] It should be noted that Figure 6 The structure and position of the sensor 126 and the switch 127 are only exemplary descriptions. The shape, structure, and position of the sensor 126 and the switch 127 are not limited to Figure 6 shown.

[0096] In some technical solutions, optionally, the preset frequency set in the sensor 126 can be adjusted.

[0097] A preset frequency can be set in sensor 126, which then compares the collected operating frequency with the preset frequency. If the preset frequency needs to be increased, the data in sensor 126 can be rewritten. When a higher preset frequency is reached, sensor 126 controls switch 127 via the controller. Similarly, the data in sensor 126 can be rewritten so that when a lower preset frequency is reached, sensor 126 controls switch 127 via the controller, thereby increasing the flexibility of valve assembly 120.

[0098] like Figure 7 As shown, in an embodiment of the present invention, a scroll compressor 200 is proposed, which includes a pump body assembly 100 as in any of the above embodiments and can achieve the same technical effects, which will not be described in detail here.

[0099] In a possible application, the scroll compressor 200 further includes components such as an orbiting scroll 210 , a stationary scroll 220 , a crankshaft 230 , and a motor 240 .

[0100] In an embodiment of the present invention, an air conditioner is proposed, which includes a scroll compressor as in the above embodiment and can achieve the same technical effects, which will not be described in detail here.

[0101] In this utility model, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean fixed, removable, or integral; "connected" can mean directly or indirectly through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0102] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0103] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A pump assembly, characterized in that: The pump body assembly is used for a scroll compressor, the scroll compressor includes an oil pool, and the pump body assembly includes: A pump body, wherein the pump body is provided with a liquid inlet, a liquid discharge port and a pressure relief port, wherein the liquid discharge port and the pressure relief port are both connected to the liquid inlet; A valve body assembly is connected to the pump body. When the operating frequency of the scroll compressor is less than a preset frequency, the valve body assembly closes the pressure relief port. When the operating frequency of the scroll compressor is greater than or equal to the preset frequency, the valve body assembly opens the pressure relief port to connect the pressure relief port with the oil pool.

2. The pump assembly according to claim 1, characterized in that The pump body comprises: a housing, wherein the liquid inlet is provided on the housing; A driven gear is located in the housing and is provided with a mounting hole; a driving gear extending into the mounting hole, the driving gear being used to drive the driven gear to rotate, the driving gear and the driven gear being used to draw oil into the housing, a gap being formed between the driving gear and the driven gear for oil circulation, the drain port being connected to the liquid inlet through the gap; A bearing, used to support the driving gear; An end cover is connected to the end of the bearing. The end cover is provided with the pressure relief port, and the pressure relief port is communicated with the gap.

3. The pump assembly according to claim 1 or 2, characterized in that: The valve body assembly comprises: The elastic valve plate is adapted to fit the pump body when the operating frequency of the scroll compressor is less than the preset frequency, and the elastic valve plate closes the pressure relief port. When the operating frequency of the scroll compressor is greater than or equal to the preset frequency, the elastic valve plate is in a deformed state, and the elastic valve plate opens the pressure relief port.

4. The pump assembly according to claim 3, characterized in that The elastic valve plate includes: a mounting portion connected to the pump body; a valve body portion, the valve body portion being used to open or close the pressure relief port; The connecting portion is used to connect the valve body portion and the mounting portion, and the width of the connecting portion is smaller than the width of the valve body portion.

5. The pump assembly according to claim 3, characterized in that: The valve body assembly further includes: The valve plate baffle is connected to the pump body, and the valve plate baffle is used to limit the maximum deformation of the elastic valve plate.

6. The pump assembly according to claim 5, characterized in that The elastic valve plate and / or the valve plate baffle are detachably connected to the pump body.

7. The pump assembly according to claim 1 or 2, characterized in that: The valve body assembly comprises: A sensor, the sensor being used to collect the operating frequency of the scroll compressor; A switch component is connected to the pump body and electrically connected to the sensor. When the sensor detects that the operating frequency of the scroll compressor is less than a preset frequency, the switch component closes the pressure relief port. When the sensor detects that the operating frequency of the scroll compressor is greater than or equal to the preset frequency, the switch component opens the pressure relief port.

8. The pump assembly according to claim 7, characterized in that The preset frequency set in the sensor can be adjusted.

9. A scroll compressor, characterized in that: include: A pump assembly as claimed in any one of claims 1 to 8.

10. An air conditioner, characterized in that: include: The scroll compressor according to claim 9.

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