CN221033117U - Pump body assembly, compressor and refrigeration equipment - Google Patents

Abstract

The utility model discloses a pump body assembly, a compressor and refrigeration equipment, and relates to the technical field of compressors, wherein the pump body assembly comprises a first cylinder, a lower bearing, a lower silencer and a heat shield, the lower end face of the first cylinder is connected with the lower bearing, and the lower bearing is provided with a first exhaust hole; the lower muffler is connected to the lower bearing and a first cavity is formed between the lower muffler and the lower bearing, and the first cavity is communicated with the first exhaust hole. Therefore, the refrigerant compressed from the first cylinder can enter the first chamber through the first exhaust hole. The heat shield wraps at least part of the structure of the lower silencer, a heat insulation cavity is formed between the heat shield and the lower silencer, and the heat insulation cavity and the first cavity are mutually isolated. Through setting up thermal-insulated chamber, can reduce the temperature rise that the refrigerant in the inside refrigeration oil of compressor casing and the first cavity produced heat exchange and lead to reduce the consumption when high-pressure compression chamber compresses the refrigerant, improve the energy efficiency.

Description

Pump body assembly, compressor and refrigeration equipment

Technical Field

The utility model relates to the technical field of compressors, in particular to a pump body assembly, a compressor and refrigeration equipment.

Background

In the related art, in a pump body assembly of a compressor, a crankshaft drives a piston to make eccentric motion in a cylinder, so that circulation of air suction, compression and air discharge is realized, and a refrigerant with low temperature and low pressure is converted into a refrigerant with high temperature and high pressure. The traditional pump body component has two-stage or multi-stage compression functions, for example, low-pressure compression and high-pressure compression are respectively carried out during two-stage compression, and refrigerant subjected to low-pressure compression can enter the high-pressure compression and then be discharged out of the pump body component. Because the pump body component is arranged in the shell of the compressor, the bottom of the shell is also provided with the refrigerating oil with higher temperature, the temperature is generally 90-100 ℃, the temperature of the refrigerant coming out from the low-pressure compression side is generally lower than the temperature of the refrigerating oil, at the moment, the refrigerant is easy to exchange heat with the refrigerating oil, so that the temperature of the refrigerant is increased, the power consumption during high-pressure compression can be increased, and the energy efficiency of the compressor is reduced.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the pump body assembly provided by the utility model reduces the temperature rise caused by heat exchange between the refrigerant and the refrigerating oil when the refrigerant comes out of the low-pressure compression cavity by arranging the heat insulation cavity, thereby reducing the power consumption when the refrigerant is compressed by the high-pressure compression cavity and improving the energy efficiency.

The utility model also provides a compressor with the pump body assembly and refrigeration equipment.

According to an embodiment of the first aspect of the utility model, a pump body assembly comprises: a first cylinder; the lower bearing is connected to the lower end face of the first cylinder and is provided with a first exhaust hole; the lower silencer is connected with the lower bearing, and a first cavity communicated with the first exhaust hole is formed between the lower silencer and the lower bearing; the heat shield is wrapped at least part of the structure of the lower silencer, a heat insulation cavity is formed between the heat shield and the lower silencer, and the heat insulation cavity is isolated from the first cavity.

The pump body assembly provided by the embodiment of the utility model has at least the following beneficial effects:

The lower bearing is connected to the lower end face of the first cylinder, and the lower bearing is provided with a first exhaust hole; the lower muffler is connected to the lower bearing and a first cavity is formed between the lower muffler and the lower bearing, and the first cavity is communicated with the first exhaust hole. Therefore, the refrigerant compressed from the first cylinder can enter the first chamber through the first exhaust hole. The heat shield wraps at least part of the structure of the lower silencer, a heat insulation cavity is formed between the heat shield and the lower silencer, and the heat insulation cavity and the first cavity are mutually isolated. Through setting up thermal-insulated chamber, can reduce the temperature rise that the refrigerant in the inside refrigeration oil of compressor casing and the first cavity produced heat exchange and lead to reduce the consumption when high-pressure compression chamber compresses, improve the energy efficiency.

According to some embodiments of the utility model, the heat insulation cavity is vacuum, and the vacuum degree is more than or equal to 2000pa.

According to some embodiments of the utility model, the insulating cavity is filled with an insulating medium.

According to some embodiments of the utility model, the ratio of the volume of the insulating cavity to the volume of the first cavity is a, satisfying: 2. more than or equal to a is more than or equal to 0.1.

According to some embodiments of the utility model, the lower muffler and the heat shield are a unitary structure.

The compressor according to the second aspect of the utility model comprises a shell and the pump body assembly in the previous embodiment, wherein the shell is provided with an inner cavity, and the pump body assembly is installed in the inner cavity.

The compressor provided by the embodiment of the utility model has at least the following beneficial effects:

The pump body assembly of the embodiment of the first aspect is adopted, the pump body assembly is connected to the lower end face of the first cylinder through a lower bearing, and the lower bearing is provided with a first exhaust hole; the lower muffler is connected to the lower bearing and a first cavity is formed between the lower muffler and the lower bearing, and the first cavity is communicated with the first exhaust hole. Therefore, the refrigerant compressed from the first cylinder can enter the first chamber through the first exhaust hole. The heat shield wraps at least part of the structure of the lower silencer, a heat insulation cavity is formed between the heat shield and the lower silencer, and the heat insulation cavity and the first cavity are mutually isolated. Through setting up thermal-insulated chamber, can reduce the temperature rise that the refrigerant in the inside refrigeration oil of compressor casing and the first cavity produced heat exchange and lead to reduce the consumption when high-pressure compression chamber compresses, improve the energy efficiency.

According to some embodiments of the utility model, the bottom of the inner cavity is formed as an oil sump for containing frozen oil, and the insulating cavity is in communication with the inner cavity to enable frozen oil of the oil sump to enter the insulating cavity.

According to some embodiments of the utility model, the heat shield is provided with a through hole, through which the heat insulating cavity communicates with the inner cavity.

According to some embodiments of the utility model, the pump body assembly further comprises an upper bearing, a second cylinder, an upper silencer and a diversion channel, wherein the upper bearing is connected to the upper end face of the second cylinder and is provided with a second exhaust hole, the upper silencer is connected to the upper bearing, a second cavity communicated with the second exhaust hole is formed between the upper silencer and the upper bearing, and the diversion channel is used for communicating the second cavity with the heat insulation cavity.

According to some embodiments of the utility model, the flow-directing channel is formed within the pump body assembly.

According to some embodiments of the utility model, the flow guide channel is a heat conduction pipe, at least part of the structure of the heat conduction pipe is located outside the pump body assembly, and two ends of the heat conduction pipe are respectively connected into the second cavity and the heat insulation cavity.

According to some embodiments of the utility model, the pump body assembly further comprises a partition member connected between the first cylinder and the second cylinder, the partition member is provided with an intermediate chamber, a low-pressure compression chamber is arranged in the first cylinder, a high-pressure compression chamber is arranged in the second cylinder, and the low-pressure compression chamber is communicated with an air inlet of the high-pressure compression chamber through the intermediate chamber and/or the first chamber.

An embodiment of a refrigeration device according to a third aspect of the present utility model includes a compressor as described in the above embodiment.

The refrigeration equipment provided by the embodiment of the utility model has at least the following beneficial effects:

Adopting the compressor of the embodiment of the second aspect, the compressor is connected to the lower end surface of the first cylinder by arranging a lower bearing, and the lower bearing is provided with a first exhaust hole; the lower muffler is connected to the lower bearing and a first cavity is formed between the lower muffler and the lower bearing, and the first cavity is communicated with the first exhaust hole. Therefore, the refrigerant compressed from the first cylinder can enter the first chamber through the first exhaust hole. The heat shield wraps at least part of the structure of the lower silencer, a heat insulation cavity is formed between the heat shield and the lower silencer, and the heat insulation cavity and the first cavity are mutually isolated. Through setting up thermal-insulated chamber, can reduce the temperature rise that the refrigerant in the inside refrigeration oil of compressor casing and the first cavity produced heat exchange and lead to reduce the consumption when high-pressure compression chamber compresses, improve the energy efficiency.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic cross-sectional view of a compressor according to one embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a pump body assembly according to one embodiment of the present utility model;

FIG. 3 is a schematic sectional view showing a part of the structure of a compressor according to an embodiment of the present utility model;

FIG. 4 is a schematic sectional view showing a part of the structure of a compressor according to another embodiment of the present utility model;

FIG. 5 is a schematic cross-sectional view of a compressor according to another embodiment of the present utility model;

FIG. 6 is a graph of the ratio of the volume of the insulating chamber to the volume of the first chamber versus COP for one embodiment of the utility model.

Reference numerals:

A compressor 1000;

A pump body assembly 100; an exhaust passage 101; a first cylinder 110; low pressure compression chamber 111; a lower bearing 120; a lower muffler 130; a first cavity 131; a heat shield 140; a heat insulating chamber 141; a through hole 142; an upper bearing 150; a second cylinder 160; a high-pressure compression chamber 161; an upper muffler 170; a second cavity 171; a diversion channel 180; a divider member 190;

A housing 200; a lumen 210; an exhaust pipe 220; a base 230; a refrigeration oil 240;

a reservoir 300;

A motor assembly 400; a stator 410; a rotor 420; a crankshaft 430; a first piston 431; a second piston 432.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the direction or positional relationship indicated with respect to the description of the orientation, such as up, down, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, plural means two or more. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

The compressor can be used for refrigeration equipment, such as heat pump water heater, air conditioner and the like, and can compress low-temperature low-pressure refrigerant into high-temperature high-pressure refrigerant to provide power for the circulation of the refrigeration system. The existing compressor has a scheme of one-stage compression and multi-stage compression, namely, the multi-stage compression is carried out through a pump body assembly for multiple times and then the refrigerant is discharged. The primary compression is mainly suitable for occasions with low pressure requirements on the refrigerant. Compared with one-stage compression, the multi-stage compression can enable the compressor to have higher volumetric efficiency, improve the pressure of refrigerant discharged by the pump body assembly, and enable the compressor to have a better effect in the occasions of low-temperature heating and high-temperature refrigeration.

For example, referring to fig. 1, a compressor 1000 according to an embodiment of the present utility model includes a housing 200, a pump body assembly 100, a motor assembly 400, and a liquid reservoir 300, wherein the housing 200 has an inner cavity 210, and an exhaust pipe 220 for exhausting air is provided at an upper end of the housing 200. The pump body assembly 100 is installed inside the inner cavity 210, and the reservoir 300 is located outside the housing 200 and connected to the pump body assembly 100 through an air inlet pipe. The motor assembly 400 includes a stator 410 and a rotor 420, the stator 410 being fixedly coupled to an inner wall of the housing 200, the rotor 420 being positioned between the stators 410.

Referring to fig. 2, the pump body assembly 100 includes a lower bearing 120, a first cylinder 110, a lower muffler 130, a diaphragm member 190, a second cylinder 160, an upper bearing 150, an upper muffler 170, and a crankshaft 430. Along the axial direction of the crankshaft 430, the crankshaft 430 includes a first eccentric portion and a second eccentric portion that are disposed at intervals, the first eccentric portion is sleeved with a first piston 431, the second eccentric portion is sleeved with a second piston 432, and the motor assembly 400 is used for driving the crankshaft 430 to rotate. The first cylinder 110 is formed with a low pressure compression chamber 111, and the first piston 431 is rotatably provided in the low pressure compression chamber 111, and an intake pipe of the accumulator 300 is connected to the first cylinder 110. The lower bearing 120 is connected to the lower end surface of the first cylinder 110, the lower muffler 130 is connected to a side of the lower bearing 120 facing away from the second cylinder 160, and a first cavity 131 is formed between the lower bearing 120 and the lower muffler 130. The lower bearing 120 is further provided with a first exhaust hole through which the low pressure compression chamber 111 communicates with the first chamber 131. The partition member 190 is disposed on a side of the first cylinder 110 facing away from the lower bearing 120, and the second cylinder 160 is connected to a side of the partition member 190 facing away from the first cylinder 110, the partition member 190 functioning to partition the first cylinder 110 and the second cylinder 160.

With continued reference to fig. 2, the second cylinder 160 is formed with a high-pressure compression chamber 161, and the second piston 432 is rotatably disposed in the high-pressure compression chamber 161. The upper bearing 150 is connected to the upper end surface of the second cylinder 160 and is provided with a second exhaust hole, the upper muffler 170 is connected to the upper bearing 150, and a second chamber 171 is formed between the upper muffler 170 and the upper bearing 150, and the high pressure compression chamber 161 is communicated with the second chamber 171 through the first exhaust hole. The pump body assembly 100 further includes a discharge passage 101, the discharge passage 101 communicating the first chamber 131 and the high-pressure compression chamber 161.

Therefore, when the compressor 1000 is operated, the refrigerant having a low temperature and a low pressure enters the accumulator 300. The liquid reservoir 300 can reduce the liquid refrigerant from entering the pump body assembly 100, so as not to cause liquid impact. The gaseous refrigerant enters the low pressure compression chamber 111 through the outlet pipe of the accumulator 300. When the crankshaft 430 rotates, the first piston 431 is driven to rotate in the low-pressure compression chamber 111, so as to compress the low-temperature and low-pressure refrigerant pressure, and then the refrigerant is discharged to the first chamber 131 through the first exhaust hole, sequentially passes through the exhaust channel 101, the high-pressure compression chamber 161, the second exhaust hole, the second chamber 171 and the inner chamber 210, is further heated by the stator 410 and the rotor 420, becomes a high-temperature and high-pressure refrigerant, and is finally discharged from the exhaust pipe 220 of the housing 200. The refrigerant completes the first-stage compression in the first cylinder 110 and completes the second-stage compression in the second cylinder 160, and the pressure of the refrigerant can be increased by adopting a two-stage compression mode, so that the compressor 1000 can play a good role in low-temperature heating and high-temperature refrigeration.

Referring to fig. 1, an oil pool storing the frozen oil 240 is formed at the bottom of the case 200. The refrigeration oil 240 is also referred to as a lubricating oil, which has a suitable viscosity, good oil-water separation, corrosion resistance, good oxidation resistance, and the like. The refrigeration oil 240 is mutually soluble with the refrigerant, and plays roles of lubrication, energy adjustment and the like. The higher temperature of the refrigeration oil 240, typically between 90 deg.c and 100 deg.c, is due to the higher pressure and temperature inside the housing 200. Since the first chamber 131 is located below the inner chamber 210, it is closer to the refrigerant oil 240. And the temperature of the refrigerant in the first chamber 131 is lower than the temperature of the refrigerant 240, so that heat exchange with the high-temperature refrigerant 240 is easy to occur, and the temperature of the refrigerant in the first chamber 131 is increased. Since the refrigerant in the first chamber 131 needs to enter the high-pressure compression chamber 161 for secondary compression, the density of the refrigerant increases when the temperature increases, the air intake of the high-pressure compression chamber 161 is reduced, the power consumption of the second cylinder 160 is increased, and the energy efficiency of the compressor 1000 is reduced.

To improve the above-described problems, referring to fig. 1 and 2, in the embodiment of the present utility model, the pump body assembly 100 further includes a heat shield 140, and the heat shield 140 is wrapped around at least a portion of the structure of the lower muffler 130, for example, around a portion of the structure of the lower muffler 130, or entirely around the lower muffler 130. A heat insulation chamber 141 is formed between the heat shield 140 and the lower muffler 130, and the heat insulation chamber 141 and the first chamber 131 are isolated from each other. Wherein, the heat insulation cavity 141 can reduce air convection and heat conductivity coefficient by vacuumizing, so as to reduce temperature rise caused by heat exchange with the refrigerant in the first cavity 131, thereby reducing power consumption during high-pressure compression and improving energy efficiency. Wherein, the vacuum degree in the heat insulation chamber 141 is greater than or equal to 2000pa, for example, the vacuum degree in the heat insulation chamber 141 may be: 2500pa, 3000pa, 4000pa, 6000pa.

It should be noted that, by manufacturing the two temperature cloud charts of the pump body assembly 100 with the heat insulation cavity 141 and without the heat insulation cavity 141 in a simulation manner, after comparing, it can be seen that the temperature of the refrigerant in the first cavity 131 is lower than the temperature of the refrigerant without the heat insulation cavity 141 after the heat insulation cavity 141 is provided. Therefore, the heat insulation cavity 141 can bring better effect, and effectively reduce the temperature rise of the refrigerant in the first cavity 131 caused by heat exchange.

It will be appreciated that the insulating chamber 141 is required to have a high degree of tightness, given that the insulating chamber 141 is insulated by means of an evacuated. For example, when the heat shield 140 and the lower muffler 130 are connected by welding, the heat shield and the lower muffler cannot be welded by spot welding, but are connected by full welding, so that the sealing performance is ensured. However, the heat generated by full welding is large, and the heat shield 140 or the lower muffler 130 is easily deformed and damaged, so that the heat shield 140 and the muffler are required to be made of materials with larger thickness and better quality, which results in the increase of the weight of the pump body assembly, the increase of the cost, the great difficulty of manufacturing and the low yield.

In order to reduce the manufacturing difficulty and the production cost, the yield is improved. In the embodiment of the present utility model, the heat insulating medium may be disposed in the heat insulating cavity 141, for example, the refrigerating fluid 240, high temperature resistant polystyrene, or other heat insulating medium that does not react with the refrigerating fluid 240 may be filled. It will be appreciated that by providing the insulating medium within the insulating cavity 141, the sealing performance requirements for the insulating cavity 141 are not high, and the insulating medium can still perform the function of heat insulation even if there is a gap at the junction of the heat shield 140 and the lower muffler 130 or the lower bearing 120. Therefore, the thickness of the heat shield 140 can be made thinner, the requirement on the tightness of connection is not high, the production mode can be simplified, the yield can be improved, and the manufacturing cost can be reduced.

Further, in embodiments of the present utility model, the chilled oil 240 in the oil pool may be utilized directly for insulation. For example, the edge of the heat shield 140 and the lower muffler 130 are connected by spot welding, so that a gap exists between the heat shield 140 and the lower muffler 130, and a portion of the frozen oil 240 may enter the heat insulating chamber 141 through the gap. Since the refrigerant 240 in the heat-insulating chamber 141 does not participate in the refrigerant circulation and the position is substantially unchanged, there is a gradient in temperature between the refrigerant 240 in the heat-insulating chamber 141 and the refrigerant 240 in the oil pool, i.e., the temperature of the refrigerant 240 in the heat-insulating chamber 141 near the first chamber 131 is low and the temperature near one side of the oil pool is slightly high. Therefore, the insulating chamber 141 can also perform a certain heat insulating function when the refrigerating oil 240 exists. It should be noted that, in another embodiment, the cooling oil 240 may enter the heat insulation cavity 141 through a slit, and a manner of providing the through hole 142 on the heat insulation cover 140 may be adopted, and the cooling oil 240 enters the heat insulation cover 140 through the through hole 142, so that a suitable scheme is selected according to practical situations.

It will be appreciated that when the insulating cavity 141 is insulated by the refrigerating oil 240, the temperature of the refrigerating oil 240 in the insulating cavity 141 will eventually be consistent with the temperature of the refrigerating oil 240 in the oil pool in the long-term operation process of the compressor 1000, so that the insulating effect is poor, resulting in greater power consumption required in secondary compression or multi-stage compression, and affecting the energy efficiency of the compressor 1000.

To this end, referring to fig. 1 and 2, in the embodiment of the present utility model, the pump body assembly 100 further includes a flow guide passage 180, and the flow guide passage 180 communicates with the second chamber 171 and the heat insulation chamber 141. Therefore, the refrigerant discharged from the second chamber 171 enters the heat insulating chamber 141 through the flow guide passage 180 in addition to the inner chamber 210 of the housing 200. When the bottom of the insulating chamber 141 is provided with the through-hole 142, in the case where the crankshaft 430 or other member agitates the oil pool, the frozen oil 240 enters the insulating chamber 141 through the through-hole 142. The refrigerant enters the heat insulation chamber 141 through the guide passage 180, and the refrigerant is compressed by the second cylinder 160 at this time, and has a high pressure and a high temperature (the temperature is about 60 ℃), so that the refrigerant 240 can be extruded from the through hole 142, and the heat insulation chamber 141 is filled with the refrigerant having the temperature of about 60 ℃. Compared with the refrigeration oil 240 with the temperature of 90-100 ℃, the refrigerant with the temperature of about 60 ℃ is filled in the heat insulation cavity 141 to play a certain heat insulation role, so that the temperature rise caused by heat exchange of the refrigeration oil 240 and the refrigerant in the first cavity 131 is effectively reduced, the power consumption during high-pressure compression is reduced, and the energy efficiency is improved. Meanwhile, the thickness of the heat shield 140 can be made thinner, the requirement on the tightness of connection is not high, the production mode can be simplified, the yield is improved, and the manufacturing cost is reduced.

Referring to fig. 2, in an embodiment of the present utility model, a diversion channel 180 is formed in the pump body assembly 100. For example, the flow guide passage 180 is formed by providing holes capable of communicating with each other in each of the upper bearing 150, the second cylinder 160, the partition member 190, the first cylinder 110, and the lower bearing 120. With the above scheme, the compressor 1000 has compact layout of each component and small occupied area. Referring to fig. 5, in another embodiment of the present utility model, the flow guiding channel 180 is a heat conducting tube, and part of the structure of the heat conducting tube is located outside the pump body assembly 100, for example, the heat conducting tube may be located in the inner cavity 210 of the housing 200, or a part of the structure is located outside the housing 200. By adopting the scheme of the heat conducting pipe, the sealing performance of the heat conducting pipe can be improved, the air leakage condition can be effectively improved, and the installation process is simplified.

Referring to fig. 3, in the embodiment of the present utility model, the heat shield 140 and the lower muffler 130 are two separate components, and may be coupled together by welding, screw connection, or snap connection during the assembly stage, or the heat shield 140 and the lower bearing 120 may be fixedly coupled. Referring to fig. 4, in another embodiment of the present utility model, the heat shield 140 and the lower muffler 130 are integrally formed, so that the assembly process can be simplified, the assembly efficiency can be improved, the vacuum structure can be easily formed in the heat-insulating chamber 141, the sealing performance is good, and the heat-insulating effect is good.

In the embodiment of the present utility model, an intermediate chamber is provided in the partition member 190, and the low-pressure compression chamber 111 communicates with the high-pressure compression chamber 161 through the intermediate chamber and the first chamber 131. Or the low-pressure compression chamber 111 is communicated with the air inlet of the high-pressure compression chamber 161 only through the first chamber 131; or the low-pressure compression chamber 111 exhausts to the middle chamber and the first chamber 131 respectively, and finally enters the high-pressure compression chamber 161 to improve the exhaust efficiency, and a proper scheme is selected according to actual situations. Taking the example that the low-pressure compression chamber 111 communicates with the high-pressure compression chamber 161 through the intermediate chamber and the first chamber 131: it can be understood that the refrigerant discharged from the low pressure compression chamber 111 enters the middle chamber and the first chamber 131 respectively, and finally enters the high pressure compression chamber 161, and the refrigerant passes through the middle chamber first, so as to have a certain cooling effect, and meanwhile, the refrigerant pressure is uniform, and then enters the high pressure chamber, so that the stability of the low pressure compression chamber 111 during compression can be improved, and the volumetric efficiency and the overall performance of the compressor 1000 are further improved.

In the embodiment of the present utility model, the ratio of the volume of the heat insulation chamber 141 to the volume of the first chamber 131 is a, satisfying: 2. not less than 0.1. Gtoreq.a, for example, a may be 1.8, 1.5, 1.2, 1, 0.5, etc. Referring to fig. 6, it can be understood that as the value of a gradually increases, COP energy efficiency increases, and when a is greater than 2, the tendency of the increase slows. At a=2.5 or so, COP is not substantially increased. Therefore, the ratio of the volume of the heat insulation chamber 141 to the volume of the first chamber 131 is reasonably designed, and the energy efficiency of the compressor 1000 can be improved. In the refrigeration, COP refers to a ratio of the refrigeration capacity to the input power of the compressor 1000; in heating, cop+1 in cooling is used. The higher the COP value, the higher the efficiency of the compressor 1000, and the more power-efficient.

The compressor 1000 of one embodiment of the present utility model includes the pump body assembly 100 of the above-described embodiment. By adopting the pump body assembly 100 of the above embodiment, the pump body assembly 100 is connected to the lower end surface of the first cylinder 110 by providing the lower bearing 120, and the lower bearing 120 is provided with the first exhaust hole; the lower muffler 130 is connected to the lower bearing 120 and a first cavity 131 is formed between the lower muffler and the lower bearing 120, and the first cavity 131 communicates with the first exhaust hole. Accordingly, the refrigerant compressed from the inside of the first cylinder 110 can enter the first chamber 131 through the first exhaust hole. The heat shield 140 wraps at least part of the structure of the lower muffler 130 with a heat insulating cavity 141 formed therebetween, and the heat insulating cavity 141 and the first cavity 131 are isolated from each other. By providing the heat insulation chamber 141, the temperature rise caused by heat exchange between the refrigerant 240 in the casing 200 of the compressor 1000 and the refrigerant in the first chamber 131 can be reduced, thereby reducing the power consumption of the high-pressure compression chamber 161 when compressing the refrigerant and improving the energy efficiency.

Since the compressor 1000 adopts all the technical solutions of the pump body assembly 100 in the above embodiments, at least all the beneficial effects brought by the technical solutions in the above embodiments are provided, and will not be described in detail herein.

The refrigerating device according to an embodiment of the present utility model includes the compressor 1000 according to the above embodiment, and the refrigerating device may be a refrigerator, an integrated air conditioner, a split air conditioner, an air duct machine, a window machine, or the like. The bottom of the housing 200 of the compressor 1000 is provided with a base 230, thereby facilitating the fixed connection of the compressor 1000 to the refrigeration equipment through the base 230. By adopting the compressor 1000 of the above embodiment, the compressor 1000 is used for compressing the gaseous refrigerant, and the heat exchange efficiency can be improved.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims (13)

1. The pump body subassembly, its characterized in that includes:

A first cylinder;

the lower bearing is connected to the lower end face of the first cylinder and is provided with a first exhaust hole;

The lower silencer is connected with the lower bearing, and a first cavity communicated with the first exhaust hole is formed between the lower silencer and the lower bearing;

The heat shield is wrapped at least part of the structure of the lower silencer, a heat insulation cavity is formed between the heat shield and the lower silencer, and the heat insulation cavity is isolated from the first cavity.

2. The pump body assembly of claim 1, wherein: the heat insulation cavity is vacuum, and the vacuum degree is more than or equal to 2000pa.

3. The pump body assembly of claim 1, wherein: and the heat insulation cavity is filled with heat insulation medium.

4. A pump body assembly according to any one of claims 1 to 3, wherein: the ratio of the volume of the heat insulation cavity to the volume of the first cavity is a, and the following conditions are satisfied: 2. more than or equal to a is more than or equal to 0.1.

5. A pump body assembly according to any one of claims 1 to 3, wherein: the lower silencer and the heat shield are integrated into a structural member.

6. A compressor, comprising:

A shell provided with an inner cavity;

The pump body assembly of any one of claims 1 to 5, mounted within the interior cavity.

7. The compressor as set forth in claim 6, wherein: the bottom of the inner cavity is formed into an oil pool for containing frozen oil, and the heat insulation cavity is communicated with the inner cavity so that the frozen oil in the oil pool can enter the heat insulation cavity.

8. The compressor of claim 7, wherein: the heat shield is provided with a through hole, and the heat insulation cavity is communicated with the inner cavity through the through hole.

9. The compressor as set forth in claim 6, wherein: the pump body assembly further comprises an upper bearing, a second cylinder, an upper silencer and a flow guide channel, wherein the upper bearing is connected to the upper end face of the second cylinder and is provided with a second exhaust hole, the upper silencer is connected to the upper bearing, a second cavity communicated with the second exhaust hole is formed between the upper silencer and the upper bearing, and the flow guide channel is used for communicating the second cavity with the heat insulation cavity.

10. The compressor as set forth in claim 9, wherein: the flow guide channel is formed in the pump body assembly.

11. The compressor as set forth in claim 9, wherein: the flow guide channel is a heat conduction pipe, at least part of the structure of the heat conduction pipe is positioned outside the pump body assembly, and two ends of the heat conduction pipe are respectively connected into the second cavity and the heat insulation cavity.

12. The compressor as set forth in claim 9, wherein: the pump body assembly further comprises a partition plate member connected between the first cylinder and the second cylinder, wherein the partition plate member is provided with a middle cavity, a low-pressure compression cavity is arranged in the first cylinder, a high-pressure compression cavity is arranged in the second cylinder, and the low-pressure compression cavity is communicated with an air inlet of the high-pressure compression cavity through the middle cavity and/or the first cavity.

13. Refrigeration plant, its characterized in that: comprising a compressor according to any one of claims 6 to 12.