CN116792953A - Refrigerant circulation system and air conditioner - Google Patents

Abstract

The application provides a refrigerant circulation system and an air conditioner, wherein the refrigerant circulation system comprises a liquid storage tank; a compressor comprising an energizing element; the air suction end of the compressor is communicated with the liquid storage tank so as to suck air from the liquid storage tank when the energy supply element operates; the heat transfer tube is provided with a heat absorption section and a heat dissipation section which are arranged oppositely; the heat absorption section is thermally connected with the energy supply element of the compressor, and the heat dissipation section is thermally connected with the liquid storage tank so as to absorb and transfer heat generated by the energy supply element into the liquid storage tank when the energy supply element operates. The application aims to increase the temperature of a refrigerant at a suction end of a compressor by utilizing the operation heat of the compressor and reduce the operation temperature of the compressor.

Description

Refrigerant circulation system and air conditioner

Technical Field

The application relates to the technical field of air conditioner refrigeration, in particular to a refrigerant circulation system and an air conditioner.

Background

The air conditioner includes a refrigerant circulation system. The refrigerant circulation system completes the refrigeration of the appointed space through the circulation flow of the refrigerant. The refrigerant circulation system includes a compressor. The compressor is a heart of a refrigerant circulation system and is a power source for refrigeration, and the compressor compresses a low-temperature low-pressure gaseous refrigerant into a high-temperature high-pressure gaseous refrigerant. Currently, the compressor in common use is a rolling rotor compressor. Such compressors are small in size and are therefore typically provided with a liquid reservoir at their suction end.

In the related art, the refrigerant in the liquid storage tank is low in temperature, so that the liquid refrigerant is sucked into the compressor during suction, and the compressor is further hydraulically compressed, and is easy to damage.

Disclosure of Invention

The application provides a refrigerant circulating system and an air conditioner, which aim to improve the temperature of a refrigerant at an air suction end by utilizing the operation heat of a compressor and avoid the occurrence of hydraulic compression; in addition, the refrigerant in the liquid storage tank absorbs heat of the compressor, so that the running temperature of the compressor can be reduced, and the running efficiency of the compressor is improved.

The application provides a refrigerant circulation system, comprising:

a liquid storage tank;

a compressor comprising an energizing element; the air suction end of the compressor is communicated with the liquid storage tank so as to suck air from the liquid storage tank when the energy supply element operates; and

the heat transfer tube is provided with a heat absorption section and a heat dissipation section which are arranged oppositely; the heat absorption section is thermally connected with the energy supply element of the compressor, and the heat dissipation section is thermally connected with the liquid storage tank so as to absorb and transfer heat generated by the energy supply element into the liquid storage tank when the energy supply element operates.

Optionally, the energy supply element comprises a power supply coil, and the heat absorbing section is disposed around the power supply coil.

Optionally, an air supply pipeline is arranged in the liquid storage tank and is communicated with an air suction section of the compressor; the heat dissipation section is arranged on the outer wall of the air supply pipeline.

Optionally, the heat dissipation section is disposed near the bottom of the liquid storage tank.

Optionally, the heat transfer tube comprises:

the pipe body is provided with the heat absorption section and the heat dissipation section; the heat transfer medium is filled in the tube body; and

the capillary core is arranged in the pipe body and extends from the heat absorption section to the heat dissipation section; the wick has a gas channel extending from the heat absorbing section to the heat dissipating section.

Optionally, the tube body has a heat transfer section located at the heat absorbing section and the heat dissipating section, and a cut-off switch is disposed on the heat transfer section, and the cut-off switch is configured to have a first state of turning on the gas channel and a second state of cutting off the gas channel.

Optionally, a temperature sensing module is arranged on the heat dissipation section; the refrigerant circulation system further comprises a controller, wherein the controller is electrically connected with the temperature sensing module and the cut-off switch respectively;

when the temperature acquired by the temperature sensing module is lower than a first preset temperature, the controller controls the cut-off switch to be turned on; when the temperature acquired by the temperature sensing module is higher than a second preset temperature, the controller controls the cut-off switch to be turned off; wherein the first preset temperature is lower than the second preset temperature.

Optionally, a heat insulation layer is arranged on the heat transfer section.

Optionally, the refrigerant circulation system further includes:

the inlet end of the condenser is communicated with the outlet end of the compressor;

an expansion valve, the inlet end of which is communicated with the outlet end of the condenser; and

the inlet end of the evaporator is communicated with the outlet end of the expansion valve; the inlet end of the liquid storage tank is communicated with the outlet end of the evaporator.

The application also provides an air conditioner which comprises the refrigerant circulation system.

In the technical scheme of the embodiment of the application, the heat transfer pipe is used for taking heat from the energy supply element of the compressor, and then the heat transfer pipe is used for transferring the absorbed heat into the liquid storage tank, so that the temperature of the refrigerant in the liquid storage tank is increased, a large amount of refrigerant exists in a gaseous form, the liquid refrigerant amount in the liquid storage tank is reduced, and the amount of liquid refrigerant sucked by the compressor is further reduced; meanwhile, the heat absorbed by the refrigerant in the liquid storage tank is derived from the energy supply element of the compressor, so that the temperature of the energy supply element of the compressor can be reduced, the heat dissipation of the energy supply element is facilitated, and the probability of high-temperature operation conditions is reduced. The application utilizes the operation heat of the compressor to raise the temperature of the refrigerant at the air suction end, thereby avoiding the phenomenon of hydraulic compression; in addition, the refrigerant in the liquid storage tank absorbs heat of the compressor, so that the running temperature of the compressor can be reduced, and the running efficiency of the compressor is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a liquid storage tank and a compressor in a refrigerant circulation system according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a heat transfer tube in a refrigerant circulation system according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a control structure of a refrigerant circulation system according to an embodiment of the present application;

fig. 4 is a schematic block diagram of a refrigerant circulation system according to an embodiment of the present application;

fig. 5 is a schematic diagram of a control method in a refrigerant circulation system according to an embodiment of the application.

List of reference numerals

100	Compressor	313	Heat transfer section
				110	Energy supply element	320	Capillary core
111	Power supply coil	400	Temperature sensing module
				200	Liquid storage tank	500	Cut-off switch
210	Air supply pipeline	600	Controller for controlling a power supply
				300	Heat transfer tube	700	Condenser
310	Pipe body	800	Expansion valve
				311	Heat absorbing section	900	Evaporator
312	Heat dissipation section	S	Gas channel

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the apparatus or component referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present application, the term "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described as "exemplary" in this disclosure is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the application. In the following description, details are set forth for purposes of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes have not been described in detail so as not to obscure the description of the application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.

The refrigerant circulation system is an air conditioner refrigerating system. The refrigerant circulation system is provided with four large refrigerating elements, a compressor, a condenser, an expansion valve and an evaporator. Under the working condition of the air conditioning system, the compressor sucks the gaseous low-temperature low-pressure refrigerant converted from the evaporator into the interior for compression. In the compression process, the mechanical structure does work on the gaseous refrigerant, so that the refrigerant is converted into a high-temperature high-pressure gaseous form, and then the gaseous refrigerant is sent into a condenser for cooling and liquefying. In the condenser, the high-temperature and high-pressure refrigerant can transfer heat to the outdoor atmosphere, so that the high-temperature and high-pressure refrigerant is changed into a high-temperature and high-pressure liquid form, the refrigerant enters the expansion valve after coming out of the condenser, the temperature and the pressure are reduced through the expansion valve, the cooled liquid flows back to the evaporator, and the cooled liquid is changed into a low-temperature and low-pressure gaseous form in the evaporator again, so that the next circulation work is participated.

The liquid storage tank is an optional element of a refrigerant circulation system, and is usually matched with a rotor type compressor for use. The refrigerant in the liquid storage tank is generally low in temperature and is usually below 0 ℃, so that the refrigerant can exist in a liquid state. However, the compressor needs to suck the refrigerant in a gaseous form, avoiding the occurrence of hydraulic compression leading to a reduced compression efficiency and even avoiding damage to the compressor. Therefore, the embodiment of the application provides a refrigerant circulation system, which aims to improve the temperature of a refrigerant at the suction end of a compressor by utilizing the operation heat of the compressor, and avoid the phenomenon of hydraulic compression; in addition, the refrigerant in the liquid storage tank absorbs heat of the compressor, so that the running temperature of the compressor can be reduced, and the running efficiency of the compressor is improved.

Specifically, referring to fig. 1, an embodiment of the present application provides a refrigerant circulation system, including:

a liquid storage tank 200;

a compressor 100, said compressor 100 comprising an energizing element 110; the suction end of the compressor 100 communicates with the reservoir 200 to suck air from the reservoir 200 when the energizing element 110 is operated; and

a heat transfer pipe 300, the heat transfer pipe 300 having a heat absorbing section 311 and a heat dissipating section 312 disposed opposite to each other; the heat absorbing section 311 is thermally connected to the energy supply element 110 of the compressor 100, and the heat dissipating section 312 is thermally connected to the liquid storage tank 200, so as to absorb and transfer heat generated by the energy supply element 110 into the liquid storage tank 200 when the energy supply element 110 is operated.

In the technical scheme of the embodiment of the application, the heat transfer pipe 300 is used for taking heat from the energy supply element 110 of the compressor 100, and then the heat transfer pipe 300 is used for transferring the heat absorbed to the liquid storage tank 200, so that the temperature of the refrigerant in the liquid storage tank is increased, a large amount of refrigerant exists in a gaseous form, the amount of liquid refrigerant in the liquid storage tank 200 is reduced, and the amount of liquid refrigerant sucked by the compressor 100 is further reduced; meanwhile, as the heat absorbed by the refrigerant in the liquid storage tank 200 is derived from the energy supply element 110 of the compressor 100, the temperature of the energy supply element 110 of the compressor 100 can be reduced, the heat dissipation of the energy supply element is assisted, and the probability of high-temperature operation conditions is reduced.

In the refrigerant circulation system, the liquid storage tank 200 is disposed near the compressor 100; typically, the reservoir 200 is mounted on the compressor 100. The suction end of the compressor 100 is connected to the outlet end of the liquid storage tank 200 through a pipe to suck air from the inside of the liquid storage tank 200.

The energy supply element 110 is a component that supplies mechanical energy of the compressed refrigerant to the compressor 100, and generates a large amount of heat during operation. For example, as shown in fig. 1, the power supply element 110 includes a power supply coil 111 that generates heat when it generates an electric current. The current generated by the power coil 111 drives the motor to rotate to drive the rotor of the compressor 100 to compress the gaseous refrigerant. In an embodiment, the heat absorbing section 311 is disposed around the power coil 111. For example, the heat absorbing section 311 may be configured as a U-shaped section, a coil section, or the like. When the power supply coil 111 generates heat, the temperature thereof is high, and the heat absorbing section 311 absorbs the heat.

In addition, the discharge gas of the compressor 100 also thermally radiates the power supply coil 111, resulting in an increase in temperature of the power supply coil 111; therefore, the heat absorbed by the heat absorbing section 311 is mainly derived from the heat generated when the power supply coil 111 is energized and the high-temperature radiation heat of the discharge air of the compressor 100.

As an alternative implementation of the foregoing embodiment, as shown in fig. 1, an air supply pipe 210 is disposed in the liquid storage tank 200, and the air supply pipe 210 is in communication with an air suction section of the compressor 100; the heat dissipation section 312 is disposed on the outer wall of the air supply duct 210. The heat of the heat absorbing section 311 is transferred to the heat dissipating section 312, and the heat dissipating section 312 provides heat to the air supply pipe 210, so that the temperature of the refrigerant in the air supply pipe 210 is increased, the flash quantity of the liquid refrigerant is increased, and the air suction temperature is increased.

In an embodiment, the heat absorbing stage 311 may be disposed around the air supply duct 210, such as being spirally disposed on an outer wall of the air supply duct 210. For another example, the outer wall of the air supply duct 210 may be provided with a first groove extending along the circumferential direction thereof, and the heat absorbing stage 311 is embedded in the first groove; and/or the outer wall of the air supply duct 210 may be provided with a second groove extending in the axial direction thereof, into which the heat absorbing stage 311 is embedded.

As an alternative to the above embodiments, the heat sink piece 312 is disposed near the bottom of the reservoir 200. In an embodiment, the bottom of the liquid storage tank 200 is the outlet end of the refrigerant. By positioning the heat sink 312 near the bottom of the reservoir 200, the outlet temperature is increased. Because the air suction temperature of the compressor 100 is low, a large amount of refrigerant in a gas-liquid two-phase state begins to be generated in the liquid storage tank 200, and the liquid refrigerant falls on the bottom of the liquid storage tank 200 under the action of gravity; the heat dissipation section 312 is near the bottom, and can heat up the liquid refrigerant, so as to avoid excessive liquid refrigerant being sucked due to too low suction temperature.

For example, the heat dissipation section 312 is spirally disposed on a section of the air supply duct 210 near the bottom.

As an alternative to the above embodiment, as shown in fig. 2, the heat transfer tube 300 includes: a tube 310 and a capillary wick 320. The tube body 310 has the heat absorbing section 311 and the heat dissipating section 312. The tube body 310 is filled with a heat transfer medium. The capillary core 320 is disposed in the tube body 310 and extends from the heat absorbing section 311 to the heat dissipating section 312; the capillary wick 320 has a gas passage S extending from the heat absorbing stage 311 to the heat dissipating stage 312.

In an embodiment, the heat absorbing stage 311 is located at an upper side of the heat dissipating stage 312 in a gravitational direction. To overcome the gravity of the heat transfer medium, a wick 320 is provided in the heat transfer tube 300 to promote circulation of the heat transfer medium inside the tube body 310 by capillary action. In the heat absorbing section 311, the capillary lifted liquid heat transfer medium is heated and gasified into a gaseous heat transfer medium, and the gaseous heat transfer medium flows to the heat dissipating section 312 through the gas channel S under the action of air pressure; in the heat dissipation section 312, heat is absorbed by the refrigerant in the liquid storage tank 200, and the temperature of the gaseous heat transfer medium is reduced and liquefied into a liquid heat transfer medium, and then absorbed by the capillary core 320; the heat transfer medium circulates in this manner, and performs cyclic heat transfer in the heat transfer pipe 300.

As an alternative to the above embodiment, the tube 310 has a heat transfer section 313 located at the heat absorbing section 311 and the heat dissipating section 312 as shown in fig. 2. As shown in fig. 1, the heat transfer section 313 is provided with a cut-off switch 500, and the cut-off switch 500 is configured to have a first state of turning on the gas passage S and a second state of cutting off the gas passage S. Normally, the cut-off switch 500 is in the second state when the air conditioner is operated. When the compressor 100 is operated, the heat absorption section 311 absorbs heat to promote the temperature of the heat transfer medium in the heat absorption section 311 to rise, the heat transfer medium is gasified into a gaseous state, and then the air pressure in the air channel S of the heat absorption section 311 rises; when the cut-off switch 500 is opened in the first state, under the action of air pressure, the gaseous heat transfer medium flows towards the heat dissipation section 312, and in the heat dissipation section 312, heat is absorbed by the refrigerant in the liquid storage tank 200, the temperature of the gaseous heat transfer medium drops and liquefies into the liquid heat transfer medium, and then the liquid heat transfer medium is absorbed by the capillary cores 320; the heat transfer medium circulates in this manner, and performs cyclic heat transfer in the heat transfer pipe 300.

As an alternative to the above embodiment, as shown in fig. 1, a temperature sensing module 400 is disposed on the heat dissipation section 312. As shown in fig. 3, the refrigerant circulation system further includes a controller 600. The controller 600 is electrically connected to the temperature sensing module 400 and the cut-off switch 500, respectively. When the temperature collected by the temperature sensing module 400 is lower than a first preset temperature, the controller 600 controls the cut-off switch 500 to be turned on; when the temperature collected by the temperature sensing module 400 is higher than a second preset temperature, the controller 600 controls the cut-off switch 500 to be turned off; wherein the first preset temperature is lower than the second preset temperature.

As shown in fig. 3 and 5, when the air conditioner is started, the refrigerant circulation system starts to be started; at this point the temperature sensing module 400 begins to collect temperature; when the temperature sensing module 400 of the heat dissipation section 312 detects that the temperature is lower than the first preset temperature T1 ℃ (for example, the freezing point temperature of the heat transfer medium is set to +2 ℃), the controller 600 turns on the cut-off switch 500, and the gaseous heat transfer medium of the heat absorption section 311 enters the heat dissipation section 312 under the action of air pressure; at this time, the liquid storage tank 200 absorbs a large amount of heat, the temperature of the refrigerant in the liquid storage tank 200 is raised, the flash quantity of the liquid refrigerant is increased, the air suction temperature is raised, and meanwhile, the temperature of the gaseous heat transfer medium is reduced and liquefied into a liquid state; meanwhile, the liquid working medium of the heat dissipation section 312 enters the heat absorption section 311 under the capillary action of the capillary core 320, so that a large amount of heat of the coil is absorbed, and the surface temperature of the coil is reduced.

In order to ensure that the compressor 100 does not have excessive suction superheat (too high suction temperature may also affect the efficiency of the compressor 100), when the temperature sensing module 400 on the heat dissipation section 312 detects that the temperature reaches the second preset temperature T2 ℃, the stop valve is closed, and no circulation action is performed in the heat pipe. The setting of the second preset temperature is set according to specific working conditions.

In an embodiment, the temperature sensing module 400 may include a thermistor, may be a temperature sensor, may be a passive temperature measurement tag, or the like.

As an alternative to the above examples, the heat transfer section 313 is provided with a thermal insulation layer. Since there is a space between the accumulator tank 200 and the compressor 100, the heat transfer section 313 of the heat transfer pipe 300 is exposed to the outside of the accumulator tank 200 and the compressor 100. To this end, a thermal barrier is provided over the heat transfer section 313 to enable a substantial portion of the heat to be conducted into the reservoir 200. For example, the thermal barrier layer may be a thermal barrier foam wrapped over the heat transfer section 313, may be a thermal barrier coating applied over the heat transfer section 313, and the like.

As an alternative implementation of the above embodiment, as shown in fig. 4, the refrigerant circulation system further includes a condenser 700, an expansion valve 800, and an evaporator 900. The inlet end of the condenser 700 communicates with the outlet end of the compressor 100; an inlet end of the expansion valve 800 communicates with an outlet end of the condenser 700; an inlet end of the evaporator 900 communicates with an outlet end of the expansion valve 800; the inlet end of the reservoir 200 communicates with the outlet end of the evaporator 900. Under the working condition of the refrigerant circulation system, the low-temperature and low-pressure refrigerant in the vapor phase converted in the evaporator 900 enters the liquid storage tank 200, and the compressor 100 sucks the low-temperature and low-pressure refrigerant in the liquid storage tank 200 into the interior for compression. In the compression process, the mechanical structure works on the gaseous refrigerant, so that the refrigerant is converted into a high-temperature high-pressure gaseous form, and then is sent into the condenser 700 for cooling and liquefying. In the condenser 700, the high-temperature and high-pressure refrigerant transfers heat to the outdoor air environment, so that the high-temperature and high-pressure refrigerant is changed into a high-temperature and high-pressure liquid form, the refrigerant enters the expansion valve 800 after coming out of the condenser 700, the temperature and the pressure are reduced through the expansion valve 800, the cooled liquid flows back to the evaporator 900, and the cooled liquid is changed into a low-temperature and low-pressure gaseous form in the evaporator 900 again, so that the next cycle of operation is participated.

The application also provides an air conditioner which comprises a refrigerant circulation system. The refrigerant circulation system adopts some or all of the technical features in the foregoing embodiments, so that the air conditioner has some or all of the technical advantages of the foregoing embodiments, which are not described in detail herein.

The above describes a refrigerant circulation system and an air conditioner provided by the embodiments of the present application in detail, and specific examples are applied to illustrate the principles and embodiments of the present application, and the description of the above embodiments is only used to help understand the method and core ideas of the present application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, the present description should not be construed as limiting the present application.

Claims (10)

1. A refrigerant circulation system, comprising:

a liquid storage tank;

a compressor including an energizing element, a suction end of the compressor in communication with the reservoir to suction air from within the reservoir when the energizing element is in operation; and

the heat transfer pipe is provided with a heat absorption section and a heat dissipation section which are oppositely arranged, the heat absorption section is in thermal connection with the energy supply element of the compressor, and the heat dissipation section is in thermal connection with the liquid storage tank so as to absorb and transfer heat generated by the energy supply element into the liquid storage tank when the energy supply element operates.

2. The refrigerant circulation system of claim 1, wherein the energizing element includes a power coil, and the heat absorbing section is disposed around the power coil.

3. The refrigerant circulating system as set forth in claim 1, wherein an air supply pipe is provided in said liquid storage tank, said air supply pipe is communicated with an air suction section of said compressor, and said heat radiation section is provided on an outer wall of said air supply pipe.

4. A refrigerant circulation system as recited in any one of claims 1 to 3, wherein said heat radiating section is disposed near a bottom of said liquid storage tank.

5. The refrigerant circulation system according to claim 1, wherein the heat transfer tube includes:

the heat-absorbing section and the heat-dissipating section are arranged on the pipe body, and a heat transfer medium is filled in the pipe body; and

the capillary core is arranged in the pipe body and extends from the heat absorption section to the heat dissipation section, and the capillary core is provided with a gas channel extending from the heat absorption section to the heat dissipation section.

6. The refrigerant circulation system according to claim 5, wherein the pipe body has a heat transfer section between the heat absorbing section and the heat dissipating section, and a cut-off switch is provided on the heat transfer section, the cut-off switch being configured to have a first state of turning on the gas passage and a second state of cutting off the gas passage.

7. The refrigerant circulation system according to claim 6, wherein a temperature sensing module is provided on the heat radiation section, and the refrigerant circulation system further comprises a controller electrically connected to the temperature sensing module and the cut-off switch, respectively;

when the temperature collected by the temperature sensing module is lower than a first preset temperature, the controller controls the cut-off switch to be turned on, and when the temperature collected by the temperature sensing module is higher than a second preset temperature, the controller controls the cut-off switch to be turned off, wherein the first preset temperature is lower than the second preset temperature.

8. The refrigerant circulation system according to claim 6, wherein a heat insulating layer is provided on the heat transfer section.

9. The refrigerant circulation system according to claim 1, further comprising:

the inlet end of the condenser is communicated with the outlet end of the compressor;

an expansion valve, the inlet end of which is communicated with the outlet end of the condenser; and

the inlet end of the evaporator is communicated with the outlet end of the expansion valve; the inlet end of the liquid storage tank is communicated with the outlet end of the evaporator.

10. An air conditioner comprising the refrigerant circulation system according to any one of claims 1 to 9.