A liquid accumulator, compressor assembly and air conditioner

Abstract

The application provides a liquid accumulator, a compressor assembly and an air conditioner. The liquid accumulator comprises a shell, an inlet pipe, an outlet pipe and a buoyancy component. The outlet pipe is provided with a first oil return hole, which can communicate the inside of the shell with the inside of the outlet pipe. The buoyancy component is arranged in the inside of the shell, which can be filled with refrigerant. The first suction temperature in the first working condition is lower than the second suction temperature in the second working condition. The density of the liquid refrigerant in the inside of the shell in the first working condition is greater than the density of the buoyancy component. The buoyancy component can float on the liquid level of the liquid refrigerant to open the first oil return hole. The density of the liquid refrigerant in the inside of the shell in the second working condition is less than the density of the buoyancy component. The buoyancy component can sink below the liquid level of the liquid refrigerant to close the first oil return hole. According to the application, the amount of refrigerant stored in the bottom of the liquid accumulator can be small in the low-temperature heating working condition and the maximum refrigeration working condition, and the amount of refrigerant stored in the bottom of the liquid accumulator can be large in the rated refrigeration and low-temperature intermediate refrigeration working condition, so that the energy efficiency of the air conditioning system is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to a liquid accumulator, a compressor assembly and an air conditioner. BACKGROUND

[0002] With the increasingly fierce market competition, air conditioner systems are becoming smaller and smaller, and system matching is becoming more and more refined; among them, the height of the oil return hole of the compressor's liquid distributor is becoming more and more important.

[0003] This is because, under low-temperature heating and maximum refrigeration conditions, the amount of refrigerant stored at the bottom of the liquid distributor needs to be small in order to exert the system capacity and meet the maximum refrigeration and low-temperature heating capacity requirements; however, if the oil return hole is opened too low, the amount of liquid refrigerant circulating in the system under rated refrigeration and low-temperature intermediate refrigeration conditions is too large, which seriously affects the performance of the compressor.

[0004] That is, under low-temperature heating and maximum refrigeration conditions, the first oil return hole of the liquid distributor needs to be opened lower, while under rated refrigeration and low-temperature intermediate refrigeration conditions, the first oil return hole needs to be opened higher.

[0005] Since the liquid distributor in the prior art has the technical problem that it cannot simultaneously ensure that the amount of refrigerant stored at the bottom of the liquid distributor is small under low-temperature heating and maximum refrigeration conditions, and the amount of refrigerant stored at the bottom of the liquid distributor is large under rated refrigeration and low-temperature intermediate refrigeration conditions, the present application has been researched and designed to provide a liquid accumulator, a compressor assembly and an air conditioner. SUMMARY

[0006] Therefore, the technical problem to be solved by the present application is to overcome the defects in the prior art that the liquid distributor cannot simultaneously ensure that the amount of refrigerant stored at the bottom of the liquid distributor is small under low-temperature heating and maximum refrigeration conditions, and the amount of refrigerant stored at the bottom of the liquid distributor is large under rated refrigeration and low-temperature intermediate refrigeration conditions, thereby providing a liquid accumulator, a compressor assembly and an air conditioner.

[0007] In order to solve the above problems, the present application provides a liquid accumulator, comprising:

[0008] The housing, the inlet pipe, the outlet pipe and the buoyancy component, the inlet pipe communicates with the inside of the housing, the outlet pipe is arranged in the inside of the housing from one end of the housing, the first oil return hole is arranged on the outlet pipe, the first oil return hole can communicate the inside of the housing with the inside of the outlet pipe, the buoyancy component is arranged in the inside of the housing, the inside of the housing can be filled with refrigerant, the gas temperature discharged from the outlet pipe in the first working condition is the first suction temperature, the gas temperature discharged from the outlet pipe in the second working condition is the second suction temperature, the first suction temperature is less than the second suction temperature, the density of the liquid refrigerant in the inside of the housing in the first working condition is greater than the density of the buoyancy component, the buoyancy component can float on the liquid level of the liquid refrigerant and open the first oil return hole, the density of the liquid refrigerant in the inside of the housing in the second working condition is less than the density of the buoyancy component, the buoyancy component can sink below the liquid level of the liquid refrigerant and close the first oil return hole.

[0009] In some embodiments,

[0010] The buoyancy component can open the first oil return hole when the height between the liquid level of the liquid refrigerant in the housing and the bottom of the housing in the first working condition is higher than the first preset height, the first preset height is greater than or equal to 0, and the buoyancy component can close the first oil return hole when the housing has liquid refrigerant in the second working condition.

[0011] In some embodiments,

[0012] The first oil return hole is at a second preset distance from the bottom of the housing, when in the first working condition, and when the buoyancy component floats with the liquid level of the liquid refrigerant to the second preset distance from the bottom of the housing to the bottom of the buoyancy component, that is, the bottom end of the buoyancy component is flush with the first oil return hole, the first oil return hole is opened by the buoyancy component, at this time the height of the liquid level of the liquid refrigerant is the first preset height from the bottom of the housing, the second preset distance is greater than or equal to 0; when in the second working condition, the buoyancy component sinks to the bottom of the housing and is opposite to the first oil return hole to close the first oil return hole.

[0013] In some embodiments,

[0014] The axis direction of the housing is along the vertical direction, the inlet pipe communicates from the upper end of the housing to the inside of the housing, the outlet pipe is arranged in the inside of the housing from the lower end of the housing and extends upward to a third preset distance greater than 0 from the upper end of the housing.

[0015] In some embodiments,

[0016] The buoyancy component is in a ring structure, and the ring structure of the buoyancy component is sleeved on the outer periphery of the outlet pipe; and / or, the inside of the shell is further provided with a partition plate, the partition plate is also in a ring structure and is sleeved on the outer periphery of the outlet pipe, and the partition plate is located above the buoyancy component, the partition plate is provided with a through hole penetrating through the upper and lower end faces thereof to allow the refrigerant and / or oil to flow from above the partition plate to below the partition plate; and / or, the outlet pipe is provided with a second oil return hole, the second oil return hole can also communicate the inside of the shell with the inside of the outlet pipe, and the height of the second oil return hole is higher than that of the first oil return hole.

[0017] In some embodiments,

[0018] When the buoyancy component is in a ring structure, the inner diameter of the buoyancy component is d, the outer diameter of the outlet pipe is D, and 0.1mm≤D-d≤1mm is satisfied; and / or, the diameter of the first oil return hole is d1, the length of the buoyancy component along the axial direction is L, and 4d1≤L is satisfied.

[0019] In some embodiments,

[0020] The density of the refrigerant is 0.49-1.21g / mL; and the density of the buoyancy component is 0.92-1.15g / cm.

[0021] In some embodiments,

[0022] The refrigerant is R32, R410A or R290; and / or, the buoyancy component is made of TPE material, natural rubber, silicone rubber or hollow metal material, when the buoyancy component is made of silicone rubber, the density of the material can be adjusted by adjusting the content of silicon dioxide; and when the buoyancy component is made of hollow metal material, different densities can be achieved by adjusting the specific gravity of the hollow cavity and the solid.

[0023] The application further provides a compressor assembly comprising the above-mentioned liquid accumulator, and further comprising a compressor, and the liquid accumulator is in communication with the suction end of the compressor.

[0024] The application further provides an air conditioner comprising the above-mentioned compressor assembly.

[0025] The liquid accumulator, compressor assembly and air conditioner provided by the application have the following beneficial effects:

[0026] The application can automatically control whether the first oil return hole of the outlet pipe is opened or closed by the buoyancy component according to different working conditions by setting the density of the buoyancy component between the liquid refrigerant density in the first working condition and the liquid refrigerant density in the second working condition. When in the first working condition, the suction temperature is low, belonging to the low-temperature heating, maximum refrigeration working condition, the liquid refrigerant density is large, so that the buoyancy component floats on the liquid surface of the liquid refrigerant, thereby opening the first oil return hole by floating, returning the liquid refrigerant in this working condition to the compressor as much as possible through the first oil return hole, and improving the refrigerant circulation amount in this working condition. When in the second working condition, the suction temperature is high, belonging to the low-temperature intermediate refrigeration, rated refrigeration working condition, etc., the liquid refrigerant density is small, so that the buoyancy component sinks below the liquid surface of the liquid refrigerant, thereby closing the first oil return hole, so that as much refrigerant as possible is stored in the internal of the distributor in this working condition, reducing the refrigerant circulation amount of the system, effectively adapting different system refrigerant circulation amounts according to different working conditions, having good energy efficiency matching effect, solving the contradictory problem that different working conditions of the air conditioner have different height requirements for the oil return hole of the distributor, being able to simultaneously ensure that the refrigerant storage amount of the distributor bottom is small in the low-temperature heating working condition and the maximum refrigeration working condition, and the refrigerant storage amount of the distributor bottom is large in the rated refrigeration and low-temperature intermediate refrigeration working condition, and improving the energy efficiency of the air conditioning system. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a front view of the prior art distributor;

[0028] Figure 2 is a front view of the distributor of the application in the first working condition;

[0029] Figure 3 is a front view of the distributor of the application in the second working condition;

[0030] Figure 4 is a front view of the distributor of the application in the second working condition.

[0031] The reference signs are as follows:

[0032] 1, shell; 2, inlet pipe; 3, outlet pipe; 4, buoyancy component; 5, first oil return hole; 6, partition; 7, liquid refrigerant; 8, second oil return hole. DETAILED DESCRIPTION

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0035] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0036] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0037] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0038] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0039] like Figures 2 to 4 As shown, the present invention provides a liquid reservoir (or liquid dispenser), which includes:

[0040] The system comprises a housing 1, an inlet pipe 2, an outlet pipe 3, and a buoyancy component 4. The inlet pipe 2 communicates with the interior of the housing 1. The outlet pipe 3 extends from one end of the housing 1 into the interior of the housing 1. The outlet pipe 3 is provided with a first oil return hole 5, which connects the interior of the housing 1 with the interior of the outlet pipe 3. The buoyancy component 4 is disposed inside the housing 1, which is filled with refrigerant. Under a first operating condition, the temperature of the gas discharged from the outlet pipe 3 is a first intake temperature. Under a second operating condition, the temperature of the gas discharged from the outlet pipe 3 is a second intake temperature. The first intake temperature is lower than the second intake temperature. Under the first operating condition, the density of the liquid refrigerant inside the housing 1 is greater than the density of the buoyancy component 4, allowing the buoyancy component 4 to float on the surface of the liquid refrigerant and thus open the first oil return hole 5. Under the second operating condition, the density of the liquid refrigerant inside the housing 1 is less than the density of the buoyancy component 4, allowing the buoyancy component 4 to sink below the surface of the liquid refrigerant and thus close the first oil return hole 5.

[0041] The application can automatically control whether the first oil return hole of the outlet pipe is opened or closed by the buoyancy component according to different working conditions by setting the density of the buoyancy component between the liquid refrigerant density in the first working condition and the liquid refrigerant density in the second working condition. When in the first working condition, the suction temperature is low, belonging to low-temperature heating, maximum refrigeration working condition, the liquid refrigerant density is large, so that the buoyancy component floats on the liquid surface of the liquid refrigerant, thereby opening the first oil return hole by floating, returning the liquid refrigerant in this working condition to the compressor as much as possible through the first oil return hole, and improving the refrigerant circulation amount in this working condition. In the second working condition, the suction temperature is high, belonging to low-temperature intermediate refrigeration, rated refrigeration working condition, etc., the liquid refrigerant density is small, so that the buoyancy component sinks below the liquid surface of the liquid refrigerant, thereby closing the first oil return hole, so that as much refrigerant as possible is stored in the inside of the distributor in this working condition, reducing the refrigerant circulation amount of the system, effectively adapting different system refrigerant circulation amounts according to different working conditions, having good energy efficiency matching effect, solving the contradictory problem that different working conditions of the air conditioner have different height requirements for the oil return hole of the distributor, being able to ensure that the refrigerant storage amount at the bottom of the distributor is small in the low-temperature heating working condition and the maximum refrigeration working condition, and the refrigerant storage amount at the bottom of the distributor is large in the rated refrigeration and low-temperature intermediate refrigeration working condition, and improving the energy efficiency of the air conditioning system.

[0042] Liquid strike usually only exists in the case of starting the compressor, and the liquid refrigerant entering the cylinder is vaporized and normally compressed in normal stable operation. The application preferably uses R32 refrigerant or R410, which needs to bring a little liquid into the cylinder, at which time the energy efficiency will be better. The first working condition has a lower suction temperature than the second working condition; the density of the buoyancy component is less than the density of the liquid refrigerant in the first working condition and greater than the density of the liquid refrigerant in the second working condition.

[0043] In some embodiments,

[0044] The buoyancy component 4 can open the first oil return hole 5 when the height between the liquid surface of the liquid refrigerant in the shell 1 and the bottom of the shell 1 is higher than a first preset height in the first working condition, and the first preset height is greater than or equal to 0. The buoyancy component 4 can close the first oil return hole 5 when the shell 1 has liquid refrigerant in the second working condition.

[0045] The application can open the first oil return hole when the height between the liquid surface and the bottom of the shell is higher than the first preset height in the first working condition such as low-temperature heating or maximum refrigeration, so that the liquid refrigerant including oil sometimes is returned to the compressor through the first oil return hole, and the system refrigerant circulation amount in the working condition is increased; in the second working condition such as low-temperature intermediate refrigeration or rated refrigeration, the floating component sinks, the height thereof is automatically decreased to automatically close the first oil return hole, and the liquid refrigerant 7 is prevented from flowing out of the first oil return hole, especially when the system is stably operated in the second working condition, the liquid refrigerant 7 can be stored to prevent too much refrigerant from entering the compressor to affect the system energy efficiency, so that the energy efficiency of the air conditioning system is improved.

[0046] In some embodiments,

[0047] The first oil return hole 5 is at a second preset distance from the bottom of the shell 1, when in the first working condition, and when the floating component 4 floats with the liquid surface of the liquid refrigerant to the second preset distance from the bottom of the shell 1, that is, the bottom end of the floating component 4 is flush with the first oil return hole 5, the first oil return hole 5 is opened by the floating component 4, at this time the height of the liquid surface of the liquid refrigerant is at the first preset height from the bottom of the shell 1, and the second preset distance is greater than or equal to 0; when in the second working condition, the floating component 4 sinks at the bottom of the shell 1 and is opposite to the first oil return hole 5 to close the first oil return hole 5.

[0048] This is the preferred structure of the first oil return hole and the floating component of the application, that is, the first oil return hole is at a second preset distance from the bottom of the shell, and the floating component is preferably a floating block, when the bottom of the floating block is flush with the first oil return hole, that is, the bottom of the floating block is also at the second preset distance from the bottom of the shell, the first oil return hole can be effectively opened, that is, the first oil return hole can be opened when the liquid level in the distributor rises to the first preset height to guide the liquid refrigerant out to the outlet pipe for discharge, so that the refrigerant circulation amount of the system in the first working condition is increased, and the operation energy efficiency is improved; and in the second working condition, the floating component sinks at the inner bottom of the shell to be opposite to the first oil return hole, so that the first oil return hole can be closed, the refrigerant in the second working condition is prevented from being guided out, the refrigerant circulation amount of the system is reduced, and the energy consumption is reduced; so that the refrigerant circulation amount can be automatically controlled according to the demand of different working conditions, and the operation energy efficiency of the air conditioning system is improved.

[0049] In some embodiments,

[0050] The axis direction of the shell 1 is along the vertical direction, the inlet pipe 2 is communicated to the inside of the shell 1 from the upper end of the shell 1, and the outlet pipe 3 is arranged to extend into the inside of the shell 1 from the lower end of the shell 1 and upwardly to a third preset distance greater than 0 from the upper end of the shell 1.

[0051] This is a further preferred form of the distributor of the present application, that is, the axis of the distributor is arranged vertically upward, the inlet pipe is introduced from above to introduce the refrigerant into the distributor, and the outlet pipe is capable of guiding the separated gaseous refrigerant out from below, and at the same time, due to the first oil return hole located close to the bottom end of the shell, the liquid refrigerant can be effectively guided out to the compressor under the first working condition, while the liquid refrigerant 7 will not be guided out or a small amount of liquid refrigerant will be guided out under the second working condition.

[0052] In some embodiments,

[0053] The buoyancy component 4 is annular in structure, and is sleeved on the outer periphery of the outlet pipe 3; and / or, the interior of the shell 1 is further provided with a partition plate 6, which is also annular in structure and is sleeved on the outer periphery of the outlet pipe 3, and is located above the buoyancy component 4, and the partition plate 6 is provided with through holes penetrating through the upper and lower end faces thereof to allow the refrigerant and / or oil to flow from above the partition plate 6 to below the partition plate 6; and / or, the outlet pipe 3 is provided with a second oil return hole 8, which can also communicate the interior of the shell 1 with the interior of the outlet pipe 3, and the height of the second oil return hole 8 is higher than that of the first oil return hole 5.

[0054] This is a preferred structure of the buoyancy component of the present application, which is preferably annular in structure and is sleeved on the outer periphery of the outlet pipe, and can rise with the rising of the liquid level to open the first oil return hole to drain the liquid, and when the liquid amount is small or there is no liquid, the annular buoyancy component will descend with the descending of the liquid level to close the first oil return hole, thereby automatically controlling the opening or closing of the first oil return hole according to the amount of liquid; the interior of the shell of the distributor of the present application is further preferably provided with a partition plate, which can buffer the gaseous refrigerant in the space above the partition plate to prevent the gaseous refrigerant from causing unnecessary movement of the buoyancy component due to impact, prevent the inlet gas of the distributor from disturbing the buoyancy component to cause the buoyancy component to fail to control the bottom oil return hole, and ensure normal oil return without liquid refrigerant 7; as Figure 3 As shown, the present application further provides a second oil return hole arranged above the first oil return hole, which can especially in the second working condition (low-temperature intermediate refrigeration or rated refrigeration) when the buoyancy component closes the first oil return hole, and when the liquid level rises high, the liquid refrigerant and / or oil can be drained through the second oil return hole, and when the air conditioner is in the low-temperature intermediate refrigeration or rated refrigeration working condition for a long time, the oil return hole at the bottom of the distributor is in a closed state for a long time, the distributor produces oil accumulation to cause the compressor to be short of oil, and the design of the second oil hole of the present application can effectively prevent the oil in the interior of the distributor from being too much, and ensure the continuous and effective operation of the distributor during the distribution process.

[0055] In some embodiments,

[0056] When the floating force component 4 is in a ring structure, the inner diameter of the floating force component 4 is d, the outer diameter of the outlet pipe 3 is D, and 0.1mm≤D-d≤1mm; and / or, the diameter of the first oil return hole 5 is d1, the axial length of the floating force component 4 is L, and 4d1≤L.

[0057] The present application sets the inner diameter d of the floating force component and the outer diameter D of the outlet pipe to satisfy 0.1mm≤D-d≤1mm, which can ensure the normal movement of the floating force component (reduce resistance), prevent the gap between the floating force component and the outlet pipe from being too large to cause poor closing effect of the first oil return hole, ensure reliable oil return, and avoid discharging the liquid refrigerant 7.

[0058] If the gap between the floating block and the outlet pipe is too small, the movement of the floating force component is blocked, which easily causes the failure of the floating force component to open and close the first oil return hole. If the gap is too large, the closing effect of the floating force component on the first oil return hole is poor, and when the floating force component is located at the bottom of the distributor, too much liquid refrigerant 7 still passes through the gap between the floating force component and the outer wall of the straight pipe of the distributor, enters the compressor through the first oil return hole, and causes too much liquid refrigerant 7 to participate in the circulation in some working conditions, which affects the system energy efficiency.

[0059] The axial length L of the floating force component and the diameter d1 of the first oil return hole satisfy the relationship 4d1≤L, which can prevent the floating force component from being too short to be tilted and stuck with the outlet pipe, and ensure the normal and effective movement of the floating force component to open and close the first oil return hole. If the axial length of the floating block is too short, on the one hand, the floating force component is easily tilted and stuck, which causes the failure of the floating force component to open and close the first oil return hole, and on the other hand, the appropriate lengthening of the floating force component can avoid too much liquid refrigerant 7 flowing into the compressor due to the gap between the floating force component and the outer diameter of the straight pipe when the floating force component closes the first oil return hole.

[0060] In some embodiments,

[0061] The density of the refrigerant is 0.49-1.21g / mL; and the density of the floating force component 4 is 0.92-1.15g / cm.

[0062] This is the preferred density range of the refrigerant and the preferred density range of the floating force component of the present application, which can realize that the density of the floating force component is between the density of the liquid refrigerant in the first working condition and the density of the liquid refrigerant in the second working condition, and achieve the effect of automatically controlling the discharge of the liquid refrigerant or not through the change of the density of the liquid refrigerant in different working conditions.

[0063] In some embodiments,

[0064] The refrigerant is R290 (propane), R32 (difluoromethane) or R410A (a mixture of R32 (difluoromethane) and R125 (pentafluoroethane)); and / or, the buoyant component 4 is made of TPE material, natural rubber, silicone rubber or hollow metal material, when the buoyant component 4 is made of silicone rubber as the material, the density of the material can be adjusted by adjusting the content of silicon dioxide; when the buoyant component 4 is made of hollow metal material, different densities can be achieved by adjusting the specific gravity of the hollow cavity and the solid.

[0065] The buoyant component of the present application can use TPE material (thermoplastic elastomer, also known as artificial rubber or synthetic rubber), which has the characteristic that its density can be adjusted according to actual needs. Generally, the density of TPE material with a hardness of T0 level is between 0.95-1.15 g / cm 3 , which meets the current use characteristics of R32 refrigerant.

[0066] The present application preferably selects natural rubber as the buoyant component, and generally, the density of natural rubber is 0.92-1 g / cm 3 .

[0067] The present application preferably uses silicone rubber as the material of the buoyant component, which can adjust the content of silicon dioxide to adjust the density of the material to meet the use requirements of different refrigerants and different refrigeration systems.

[0068] The buoyant component of the present application preferably has an internal cavity structure, which can adjust its density to a specified range by adjusting the specific gravity of the internal cavity and the solid, to achieve the effect of automatically controlling the return of liquid refrigerant 7 in the first working condition and not returning liquid refrigerant in the second working condition.

[0069] The present application also provides a compressor assembly comprising the aforementioned liquid accumulator, further comprising a compressor, and the liquid accumulator is in communication with the suction end of the compressor.

[0070] The compressor of the present application has low temperature heating, maximum refrigeration suction temperature is low, liquid refrigerant density is large, low temperature intermediate refrigeration, rated refrigeration suction temperature is high, refrigerant density is small; a float is arranged at the bottom of the distributor, and the density thereof is between the two. Low temperature heating, maximum refrigeration working condition, oil return hole is opened, low temperature intermediate refrigeration, rated refrigeration working condition, oil return hole is closed.

[0071] Thus, in the low temperature heating, maximum refrigeration working condition, the remaining liquid amount in the distributor is small, the system circulation amount is large, the capacity is good, and the system requirements are met; in the rated refrigeration, low temperature intermediate refrigeration and other working conditions, the amount of refrigerant stored in the distributor is large, the circulation amount of liquid refrigerant is small, and the energy efficiency matching effect is good.

[0072] The application can meet system requirements when the compressor is in a low-temperature heating and maximum refrigeration condition, the remaining liquid in the distributor is small, and the capacity is good; when the compressor is in a rated refrigeration and low-temperature intermediate refrigeration condition, the amount of refrigerant stored in the distributor is large, and the energy efficiency matching effect is good; and the contradictory problem that different working conditions of the air conditioner require different heights of the oil return hole of the distributor is solved.

[0073] The compressor of the application has a distributor, which is characterized in that an oil return hole is arranged at the bottom of the distributor, and a buoyancy component is arranged; the buoyancy component determines the position according to the different densities of the liquid refrigerant at different temperatures, so as to open and close the bottom oil return hole.

[0074] The compressor of the application uses refrigerant A, and when the system is matched, the working conditions are divided into B-type working conditions and C-type working conditions; the characteristic is that the suction temperature of the B-type working condition is relatively high (second working condition), and the suction temperature of the C-type working condition is relatively low (first working condition); generally, the lower the temperature of the liquid refrigerant, the greater the density.

[0075] The density of the buoyancy component of the application is relatively stable with temperature change, and the density is between the densities of the liquid refrigerant in the B-type working condition and the C-type working condition.

[0076] As shown in Figure 2 , for the C-type working condition, the suction temperature is relatively low, the density of the refrigerant is large, is greater than the density of the buoyancy component, the buoyancy component floats up, the oil return hole is opened, the liquid refrigerant can enter the compressor, meets the demand of large refrigerant filling amount and circulation amount for the C-type working condition, and the capacity and energy efficiency are exerted;

[0077] As shown in Figure 3 , for the B-type working condition, the suction temperature is relatively high, the density of the refrigerant is small, is less than the density of the buoyancy component, the buoyancy component sinks, the oil return hole is closed, the liquid refrigerant is stored in the distributor, cannot enter the compressor, meets the demand of small refrigerant filling amount and circulation amount for the B-type working condition, and a large amount of liquid refrigerant entering the compressor is avoided, which affects the energy efficiency of the system;

[0078] The above-mentioned is used for a household air conditioner, the B-type working condition includes low-temperature intermediate refrigeration and rated refrigeration; and the above-mentioned C-type working condition includes low-temperature heating and maximum refrigeration.

[0079] As shown in Table 1 below, it is data of an air conditioner system matched with the compressor. The temperature inside the distributor is close to the suction temperature.

[0080] Table 1

[0081]

[0082] The R32, R410A and R290 refrigerants used in the application have the characteristic that the lower the temperature, the greater the density of the saturated liquid. Therefore, the opening and closing of the oil return hole at the bottom of the distributor can be controlled by the density of the liquid refrigerant corresponding to the suction temperature, so that different requirements for the liquid storage at the bottom of the distributor in different working conditions can be met.

[0083] The application further provides an air conditioner comprising the compressor assembly.

[0084] The above merely describes preferred embodiments of the application and is not intended to limit the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application. The above merely describes preferred embodiments of the application and is not intended to limit the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A liquid reservoir, characterized in that: include: The housing consists of a shell (1), an inlet pipe (2), an outlet pipe (3), and a buoyancy component (4). The inlet pipe (2) is connected to the interior of the shell (1). The outlet pipe (3) extends from one end of the shell (1) into the interior of the shell (1). The outlet pipe (3) is provided with a first oil return hole (5), which connects the interior of the shell (1) with the interior of the outlet pipe (3). The buoyancy component (4) is located inside the shell (1). The interior of the shell (1) can be filled with refrigerant. Under the first operating condition, the gas temperature discharged from the outlet pipe (3) is the first intake temperature. Temperature, the temperature of the gas discharged from the outlet pipe (3) under the second working condition is the second intake temperature, the first intake temperature is less than the second intake temperature, under the first working condition, the density of the liquid refrigerant inside the shell (1) is greater than the density of the buoyancy component (4), the buoyancy component (4) can float on the surface of the liquid refrigerant and thus open the first oil return hole (5), under the second working condition, the density of the liquid refrigerant inside the shell (1) is less than the density of the buoyancy component (4), the buoyancy component (4) can sink below the surface of the liquid refrigerant and thus close the first oil return hole (5).

2. The liquid reservoir according to claim 1, characterized in that: The buoyancy component (4) can open the first oil return hole (5) when the height between the liquid surface of the liquid refrigerant in the shell (1) and the bottom of the shell (1) is higher than the first preset height under the first working condition. The first preset height is greater than or equal to 0. The buoyancy component (4) can close the first oil return hole (5) when there is liquid refrigerant in the shell (1) under the second working condition.

3. The liquid reservoir according to claim 2, characterized in that: The first oil return hole (5) is a second preset distance from the bottom of the housing (1). When the first working condition is in effect, and when the buoyancy component (4) floats up to the bottom of the buoyancy component (4) at the second preset distance from the bottom of the housing (1) along with the liquid refrigerant, that is, when the bottom end of the buoyancy component (4) is flush with the first oil return hole (5), the first oil return hole (5) is opened by the buoyancy component (4). At this time, the liquid surface height of the liquid refrigerant is a first preset height from the bottom of the housing (1), and the second preset distance is greater than or equal to 0. When the second working condition is in effect, the buoyancy component (4) sinks to the bottom of the housing (1) and is opposite to the first oil return hole (5) to close the first oil return hole (5).

4. The liquid reservoir according to any one of claims 1-3, characterized in that: The axis of the housing (1) is vertical. The inlet pipe (2) is connected from the upper end of the housing (1) to the interior of the housing (1). The outlet pipe (3) is inserted from the lower end of the housing (1) into the interior of the housing (1) and extends upward to a third preset distance greater than 0 from the upper end of the housing (1).

5. The liquid reservoir according to any one of claims 1-3, characterized in that: The buoyancy component (4) is an annular structure, and the annular buoyancy component (4) is sleeved on the outer periphery of the outlet pipe (3); and / or, the interior of the housing (1) is also provided with a partition (6), the partition (6) is also an annular structure and is sleeved on the outer periphery of the outlet pipe (3), and the partition (6) is located above the buoyancy component (4), the partition (6) is provided with a through hole penetrating its upper and lower end faces, so as to allow refrigerant and / or oil to flow from the top of the partition (6) to the bottom of the partition (6); and / or, the outlet pipe (3) is provided with a second oil return hole (8), the second oil return hole (8) can also connect the interior of the housing (1) with the interior of the outlet pipe (3), and the height of the second oil return hole (8) is higher than that of the first oil return hole (5).

6. The liquid reservoir according to claim 5, characterized in that: When the buoyancy component (4) is an annular structure, the inner diameter of the buoyancy component (4) is d, the outer diameter of the outlet pipe (3) is D, and 0.1mm≤Dd≤1mm; and / or, the diameter of the first return oil hole (5) is d1, and the length of the buoyancy component (4) along the axial direction is L, satisfying 4d1≤L.

7. The liquid reservoir according to claim 1, characterized in that: The density of the refrigerant is 0.49–1.21 g / mL; the density of the buoyancy component (4) is 0.92–1.15 g / cm³. 3 .

8. The liquid reservoir according to claim 7, characterized in that: The refrigerant is R32, R410A or R290; and / or, the buoyancy component (4) is made of TPE material, natural rubber, silicone rubber or hollow metal material. When the buoyancy component (4) is made of silicone rubber, the material density can be adjusted by adjusting the content of silicon dioxide. When the buoyancy component (4) is made of hollow metal material, different densities can be achieved by adjusting the specific gravity of the hollow cavity and the solid.

9. A compressor assembly, characterized in that: The reservoir includes any one of claims 1-8, and further includes a compressor, wherein the reservoir is connected in communication with the suction end of the compressor.

10. An air conditioner, characterized in that: Includes the compressor assembly as described in claim 9.

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