CN117739544A - Refrigerating and heating system, working method and air conditioner - Google Patents
Refrigerating and heating system, working method and air conditioner Download PDFInfo
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- CN117739544A CN117739544A CN202410182673.7A CN202410182673A CN117739544A CN 117739544 A CN117739544 A CN 117739544A CN 202410182673 A CN202410182673 A CN 202410182673A CN 117739544 A CN117739544 A CN 117739544A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000003507 refrigerant Substances 0.000 claims abstract description 58
- 238000002955 isolation Methods 0.000 claims abstract description 48
- 238000005057 refrigeration Methods 0.000 claims abstract description 36
- 238000007906 compression Methods 0.000 claims abstract description 18
- 230000006835 compression Effects 0.000 claims abstract description 15
- 239000012530 fluid Substances 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 description 20
- 238000010586 diagram Methods 0.000 description 7
- 238000001704 evaporation Methods 0.000 description 7
- 239000000306 component Substances 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 6
- 230000001502 supplementing effect Effects 0.000 description 6
- 239000012528 membrane Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Abstract
The invention provides a refrigerating and heating system, a working method and an air conditioner, and relates to the technical field of refrigeration and heating. The refrigerating and heating system comprises a condenser, a throttle valve, an evaporator, a compressor and a compression and expansion device; the compression expansion device comprises a shell, an isolation assembly and a reset assembly, wherein the shell is connected with a first one-way valve, a second one-way valve, a third one-way valve and a fourth one-way valve, a first cavity and a second cavity are arranged in the shell, fluid in the first cavity can act on fluid in the second cavity through the isolation assembly, and the reset assembly is used for driving the isolation assembly to be close to the inner wall of the first cavity. The refrigerating and heating system can compress the low-pressure refrigerant from the evaporator by utilizing the high-pressure refrigerant from the condenser, so that the refrigerating capacity is increased, the power consumption of the compressor is reduced, and the refrigerating energy efficiency is improved.
Description
Technical Field
The invention relates to the technical field of refrigeration and heating, in particular to a refrigeration and heating system, a working method and an air conditioner.
Background
The refrigerating and heating system is a core component of the air conditioner and mainly comprises a compressor, a condenser, a throttle valve, an evaporator and other structures, and has the refrigerating function and the heating function. When the four-way valve is used, the flow direction of the refrigerant is changed by utilizing the four-way valve, and the refrigerant can be switched between the refrigerating system and the heating system.
Taking refrigeration as an example, a common refrigeration system comprises four processes, namely compression, condensation, throttling expansion and evaporation in sequence. The high-pressure refrigerant after the condenser directly reaches the inlet of the evaporator through a throttle valve, and the throttle process is an entropy increasing process with large pressure loss and isenthalpic, so that the energy efficiency of the existing refrigeration and heating system is lower.
Disclosure of Invention
In order to solve the problem of low energy efficiency of the existing refrigeration and heating system, one of the purposes of the invention is to provide a refrigeration and heating system.
The invention provides the following technical scheme:
a refrigerating and heating system comprises a condenser, a throttle valve, an evaporator, a compressor and a compression expansion device;
the compression expansion device comprises a shell, an isolation assembly and a reset assembly, wherein the shell is connected with a first one-way valve, a second one-way valve, a third one-way valve and a fourth one-way valve, a first cavity and a second cavity are arranged in the shell, fluid in the first cavity can act on fluid in the second cavity through the isolation assembly, and the reset assembly is used for driving the isolation assembly to be close to the inner wall of the first cavity;
the inlet of the first cavity is communicated with the outlet of the condenser through the first one-way valve, the outlet of the first cavity is communicated with the inlet of the throttle valve through the second one-way valve, the inlet of the second cavity is communicated with the outlet of the evaporator through the third one-way valve, and the outlet of the second cavity is communicated with the inlet of the compressor through the fourth one-way valve.
As a further alternative to the refrigeration and heating system, the housing has an inner cavity, the isolation assembly is disposed inside the inner cavity, and the isolation assembly separates the inner cavity to form the first cavity and the second cavity.
As a further alternative to the refrigeration and heating system, the isolation assembly employs a first diaphragm, the first diaphragm is fixedly connected with an inner wall of the inner cavity, and the first diaphragm has elasticity.
As a further alternative to the refrigeration and heating system, the isolation assembly employs a first piston slidably disposed within the inner cavity.
As a further alternative to the refrigeration and heating system, the housing includes a first housing having the first cavity and a second housing having the second cavity.
As a further alternative to the refrigeration and heating system, the isolation assembly includes a second diaphragm, a third diaphragm, and a first connector, each of the second diaphragm and the third diaphragm having elasticity;
the second diaphragm is fixedly connected with the inner wall of the first cavity, the third diaphragm is fixedly connected with the inner wall of the second cavity, and the first connecting piece is respectively connected with the second diaphragm and the third diaphragm.
As a further alternative to the refrigeration and heating system, the isolation assembly includes a second piston, a third piston, and a second connector;
the second piston is arranged in the first cavity in a sliding mode, the third piston is arranged in the second cavity in a sliding mode, and the second connecting piece is connected with the second piston and the third piston respectively.
As a further alternative to the refrigeration and heating system, the refrigeration and heating system further includes a buffer tank, and the buffer tank is disposed between the condenser and the first check valve.
It is a further object of the invention to provide a method of operation.
The invention provides the following technical scheme:
a working method applied to the refrigerating and heating system, the working method comprising:
closing the first one-way valve, the second one-way valve, the third one-way valve and the fourth one-way valve by making the isolation assembly close to the inner wall of the first cavity;
opening the first one-way valve to enable the high-pressure refrigerant from the condenser to enter the first cavity, and closing the first one-way valve after the pressure of the first cavity and the pressure of the second cavity are balanced;
opening the fourth one-way valve to discharge the compressed low-pressure refrigerant in the second cavity, and then closing the fourth one-way valve;
opening the second one-way valve to discharge the high-pressure refrigerant after expansion in the first cavity;
and opening the third one-way valve to enable the isolation assembly to be close to the inner wall of the first cavity, and then closing the second one-way valve and the third one-way valve.
It is still another object of the present invention to provide an air conditioner.
The invention provides the following technical scheme:
an air conditioner comprises the refrigerating and heating system.
The embodiment of the invention has the following beneficial effects:
when the refrigerating and heating system starts to work, the isolation assembly is close to the inner wall of the first cavity, the second cavity is filled with low-pressure refrigerant from the evaporator, and the first one-way valve, the second one-way valve, the third one-way valve and the fourth one-way valve are all in a closed state. First, the first one-way valve is opened, the high-pressure refrigerant from the condenser enters the first cavity and expands, meanwhile, the low-pressure refrigerant in the second cavity is acted on the low-pressure refrigerant in the second cavity through the isolation assembly, the low-pressure refrigerant in the second cavity is compressed until the pressure balance between the first cavity and the second cavity is achieved, and then the first one-way valve is closed. In the process, enthalpy drop generated in the expansion process of the high-pressure refrigerant in the first cavity can increase the refrigerating capacity of the refrigerating and heating system, and the compression process of the low-pressure refrigerant in the second cavity can reduce the power consumption of the compressor, so that the refrigerating energy efficiency is improved. Then, the fourth check valve is opened, the compressed low-pressure refrigerant in the second chamber is discharged to the compressor, and then the fourth check valve is closed. In the process, the pressure in the second cavity gradually decreases, and the high-pressure refrigerant in the first cavity further expands, so that larger enthalpy drop and refrigerating capacity are obtained. Then, the second one-way valve is opened, the high-pressure refrigerant expanded in the first cavity is discharged, and the pressure in the first cavity is restored to the evaporation saturation pressure. Finally, the third one-way valve is opened to enable the second cavity to be communicated with the outlet of the evaporator. At this time, the pressure in the second cavity is equal to the pressure in the first cavity, and the pressure in the second cavity and the pressure in the first cavity are all evaporation saturation pressures. The reset component further drives the isolation component to be close to the inner wall of the first cavity, sweeps out the refrigerant in the first cavity, sucks the low-pressure refrigerant from the evaporator into the second cavity, closes the second one-way valve and the third one-way valve, and returns to the initial state to complete a refrigeration cycle. The circulation process is repeated, and the high-pressure refrigerant from the condenser can be utilized to compress the low-pressure refrigerant from the evaporator. The enthalpy drop of the high-pressure refrigerant is increased in the process, and meanwhile, the compression power consumption is reduced, so that the refrigerating capacity and the energy efficiency of the refrigerating and heating system are improved.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram illustrating the operation of a prior art refrigeration system;
fig. 2 shows a schematic structural diagram of a refrigeration and heating system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a refrigeration and heating system according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a refrigeration and heating system according to another embodiment of the present invention;
FIG. 5 is a schematic diagram of a refrigeration and heating system according to another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a refrigeration and heating system according to another embodiment of the present invention;
fig. 7 is a schematic diagram illustrating an operation process of a refrigeration and heating system according to an embodiment of the present invention;
fig. 8 shows a flow chart of steps of a working method according to an embodiment of the present invention.
Description of main reference numerals:
a 100-condenser; 200-throttle valve; 300-evaporator; 400-compressor; 500-a compression expansion device; 510-a housing; 510 a-a first housing; 510 b-a second housing; 511-a first one-way valve; 512-a second one-way valve; 513-a third one-way valve; 514-fourth check valve; 515-a first cavity; 516-a second cavity; 520-isolation assembly; 521-a first separator; 522-a first piston; 523-a second separator; 524-a third separator; 525-a first connector; 526-a second piston; 527—a third piston; 528-second connector; 530-a reset component; 531-linear drive; 532-return spring.
Detailed Description
Embodiments of the present invention 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 invention.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
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 such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the templates herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a typical refrigeration system includes four processes, compression, condensation, expansion by throttling, and evaporation in sequence. The high-pressure refrigerant after the condenser directly reaches the inlet of the evaporator through a throttle valve, and the throttle process is an entropy increasing process with large pressure loss and isenthalpic, so that the refrigerating capacity is low and the energy efficiency is low.
Aiming at the problem, one solution is to add an air supplementing system, and the energy efficiency can be improved by 6% -8% in ideal conditions. However, in the actual process, because the pressure matching of the air supplementing system is complex, the ideal air supplementing pressure and flow are difficult to realize, the actual energy efficiency improving value is possibly far lower than the ideal value, and not all working condition points can be improved in energy efficiency. In addition, two-stage or multi-stage compression is needed to realize the air supplementing function structurally, so that the cost is increased, the design difficulty of rotor dynamics is improved, and the reliability of products is reduced. Pneumatic design is limited by the requirements of the air supplementing system, and the pneumatic performance of the compressor is improved.
Another solution is to add a system with hydraulic expansion turbines that uses the high pressure refrigerant in the condenser to impact one of the hydraulic turbines to produce torque, which in turn drives a compressor coaxial with the hydraulic turbine. However, the hydraulic turbine rotates at a high speed, has a higher rim linear speed, is impacted and eroded by the gas-liquid mixture at a high speed for a long time, and has a short service life. The high-speed impact process also brings noise, and the rotor needs to be lengthened, so that the design difficulty of the rotor dynamics is further increased. In addition, the hydraulic turbine has low efficiency and a narrow high-efficiency area, and can only play a role in better improving energy efficiency in a smaller working range.
Example 1
Referring to fig. 2, the present embodiment provides a cooling and heating system having both a cooling function and a heating function, and the cooling is taken as an example for explanation. The refrigeration and heating system includes a condenser 100, a throttle valve 200, an evaporator 300, a compressor 400, and a compression expansion device 500, and an inlet of the condenser 100 communicates with an outlet of the compressor 400, and an outlet of the throttle valve 200 communicates with an inlet of the evaporator 300.
Specifically, compression and expansion device 500 is comprised of a housing 510, an isolation assembly 520, and a reset assembly 530.
The housing 510 is connected with a first check valve 511, a second check valve 512, a third check valve 513 and a fourth check valve 514, and a first cavity 515 and a second cavity 516 are arranged in the housing 510.
The fluid within the first cavity 515 may act on the fluid within the second cavity 516 through the isolation assembly 520, and the reset assembly 530 may be used to urge the isolation assembly 520 proximate to the inner wall of the first cavity 515.
Wherein, the inlet of the first cavity 515 is communicated with the outlet of the condenser 100 through the first check valve 511, the outlet of the first cavity 515 is communicated with the inlet of the throttle valve 200 through the second check valve 512, the inlet of the second cavity 516 is communicated with the outlet of the evaporator 300 through the third check valve 513, and the outlet of the second cavity 516 is communicated with the inlet of the compressor 400 through the fourth check valve 514.
When the above-mentioned refrigerating and heating system starts to work, the isolation assembly 520 is close to the inner wall of the first cavity 515, the second cavity 516 is filled with the low-pressure refrigerant from the evaporator 300, and the first check valve 511, the second check valve 512, the third check valve 513 and the fourth check valve 514 are all in a closed state.
First, the first check valve 511 is opened, the high-pressure refrigerant from the condenser 100 enters the first cavity 515 and expands, and simultaneously acts on the low-pressure refrigerant in the second cavity 516 through the isolation component 520, so that the low-pressure refrigerant in the second cavity 516 is compressed until the pressure balance between the first cavity 515 and the second cavity 516 is achieved, and then the first check valve 511 is closed.
In this process, enthalpy drop generated in the expansion process of the high-pressure refrigerant in the first cavity 515 can increase the refrigerating capacity of the refrigerating and heating system, and the compression process of the low-pressure refrigerant in the second cavity 516 can reduce the power consumption of the compressor 400, thereby improving the refrigerating energy efficiency.
Under the regulation of rated working conditions, the enthalpy drop generated in the expansion process of the high-pressure refrigerant in the first cavity 515 can theoretically increase the refrigerating capacity of the refrigerating and heating system by more than 7.2%, and the compression process of the low-pressure refrigerant in the second cavity 516 can reduce the power consumption of the compressor 400 by about 50%, so that the refrigerating energy efficiency is improved by about 112%.
Then, the fourth check valve 514 is opened, the compressed low pressure refrigerant in the second chamber 516 is discharged to the inlet of the compressor 400, and the fourth check valve 514 is closed after the discharge process is completed.
In this process, the pressure in the second cavity 516 gradually decreases, and the high-pressure refrigerant in the first cavity 515 further expands, thereby obtaining a larger enthalpy drop and refrigerating capacity.
Then, the second check valve 512 is opened, the high-pressure refrigerant expanded in the first chamber 515 is discharged to the inlet of the throttle valve 200, and the pressure in the first chamber 515 is restored to the evaporation saturation pressure.
Finally, the third check valve 513 is opened, placing the second chamber 516 in communication with the outlet of the evaporator 300. At this time, the pressure in the second cavity 516 is equal to the pressure in the first cavity 515, and is the evaporation saturation pressure. The reset assembly 530 further drives the isolation assembly 520 to close to the inner wall of the first cavity 515, sweeps out the refrigerant in the first cavity 515, sucks the low-pressure refrigerant from the evaporator 300 into the second cavity 516, closes the second check valve 512 and the third check valve 513, and returns to the initial state, thereby completing a refrigeration cycle.
The cycle is repeated to compress the low pressure refrigerant from the evaporator 300 with the high pressure refrigerant from the condenser 100. The enthalpy drop of the high-pressure refrigerant is increased in the process, and meanwhile, the compression power consumption is reduced, so that the refrigerating capacity and the energy efficiency of the refrigerating and heating system are improved.
In some embodiments, the housing 510 has an inner cavity. The isolation assembly 520 is disposed within the interior cavity, and the isolation assembly 520 separates the interior cavity to form a first cavity 515 and a second cavity 516.
In some embodiments, the housing 510 is provided in an ellipsoidal configuration. The isolation component 520 adopts a first diaphragm 521, the first diaphragm 521 is fixedly connected with the inner wall of the inner cavity, and the first diaphragm 521 has elasticity.
In a natural state, the first diaphragm 521 is positioned at the center of the housing 510, and the first cavity 515 and the second cavity 516 are symmetrical with respect to the first diaphragm 521.
When the high pressure refrigerant from the condenser 100 enters the first chamber 515, a pressure difference occurs across the first diaphragm 521. The high-pressure refrigerant pushes the first diaphragm 521 to move to the side of the low-pressure second chamber 516, so that the low-pressure refrigerant in the second chamber 516 is compressed until the pressure balance is achieved. At this time, the pressure ratio in the second cavity 516 is about 0.5 th power of the ratio of the condensing pressure to the evaporating pressure.
It should be noted that the pressure balance between the first cavity 515 and the second cavity 516 does not mean that the pressure in the first cavity 515 is equal to the pressure in the second cavity 516. The pressure in the first chamber 515 is still slightly higher than the pressure in the second chamber 516, considering that the first diaphragm 521 is elastically deformed.
Accordingly, when the third check valve 513 is opened, the pressure in the second cavity 516 is equal to the pressure in the first cavity 515, the first diaphragm 521 moves toward the side where the first cavity 515 is located under the self-tension, returns to the vicinity of the middle position of the first cavity 515 and the second cavity 516, and then continues to move and is close to the inner wall of the first cavity 515 under the driving of the reset component 530.
Referring to fig. 3, in other embodiments, the housing 510 is configured in a cylindrical shape. The isolation assembly 520 employs a first piston 522, and the first piston 522 is slidably disposed within the interior chamber.
At this time, the first cavity 515 and the second cavity 516 reach pressure balance, which means that the pressure in the first cavity 515 is equal to the pressure in the second cavity 516.
Referring to fig. 4, in another embodiment, the housing 510 includes a first housing 510a and a second housing 510b, the first housing 510a has a first cavity 515, and the second housing 510b has a second cavity 516.
In some embodiments, the isolation assembly 520 is comprised of a second membrane 523, a third membrane 524, and a first connector 525, each of the second membrane 523 and the third membrane 524 having elasticity.
Wherein, the second diaphragm 523 is fixedly connected with the inner wall of the first cavity 515, the third diaphragm 524 is fixedly connected with the inner wall of the second cavity 516, and the first connecting piece 525 is respectively connected with the second diaphragm 523 and the third diaphragm 524.
When the high-pressure refrigerant from the condenser 100 enters the first cavity 515, the high-pressure refrigerant pushes the second diaphragm 523 to move toward the second housing 510b, and the second diaphragm 523 pushes the third diaphragm 524 to be concavely deformed through the first connector 525, so that the low-pressure refrigerant in the second cavity 516 is compressed.
When the third check valve 513 is opened, the pressure in the second chamber 516 is equal to the pressure in the first chamber 515, and the second diaphragm 523 and the third diaphragm 524 recover to deform under their own tension. On this basis, the reset assembly 530 may be disposed on the first housing 510a and directly act on the second diaphragm 523, forcing the second diaphragm 523 to be proximate to the inner wall of the first cavity 515. Alternatively, the reset assembly 530 may be disposed on the second housing 510b and directly act on the third diaphragm 524, thereby driving the second diaphragm 523 to close to the inner wall of the first cavity 515 through the third diaphragm 524 and the first connector 525.
Referring to fig. 5, in other embodiments, the isolation assembly 520 is comprised of a second piston 526, a third piston 527, and a second connection 528.
Wherein the second piston 526 is slidably disposed within the first cavity 515 and the third piston 527 is slidably disposed within the second cavity 516. One end of the second connecting member 528 is fixedly connected to the second piston 526, and the other end of the second connecting member 528 is fixedly connected to the third piston 527.
In some embodiments, the reset assembly 530 employs a linear actuator 531, such as an actuator, that is capable of driving the isolation assembly 520 in a linear motion along the line connecting the first cavity 515 and the second cavity 516.
The actuator may be an electric actuator, or may be a pneumatic actuator or a hydraulic actuator driven by the pressure of the working medium in the refrigerating and heating system.
Referring to fig. 6, in other embodiments, return assembly 530 employs a return spring 532. In addition, since the pressure in the first cavity 515 is equal to the pressure in the second cavity 516 when the reset assembly 530 drives the isolation assembly 520 to approach the inner wall of the first cavity 515, the reset assembly 530 can drive the isolation assembly 520 to move with a small force. Therefore, the return assembly 530 employs the low-elastic return spring 532, which is beneficial for the high-pressure refrigerant in the first cavity 515 to more fully compress the low-pressure refrigerant in the second cavity 516.
In some embodiments, the linear driving member 531 or the return spring 532 is disposed on the side of the first cavity 515, and pulls the isolation assembly 520 to be close to the inner wall of the first cavity 515.
In other embodiments, the linear driving member 531 or the return spring 532 may be disposed on the side of the second cavity 516 to push the isolation assembly 520 close to the inner wall of the first cavity 515.
Further, the refrigerating and heating system further comprises a buffer tank. The buffer tank is disposed between the condenser 100 and the first check valve 511, which can improve the smoothness of the operation of the cooling and heating system.
In short, when the refrigerating and heating system is operated, the high-pressure refrigerant from the condenser 100 can be utilized to compress the superheated steam from the evaporator 300, so that the expansion of the high-pressure refrigerant is utilized to obtain larger enthalpy drop and refrigerating capacity, and the operation of part of the compressors 400 can be replaced, so that the load of the compressors 400 in the refrigerating and heating system is reduced, the power consumption of the refrigerating and heating system is reduced, and the energy efficiency is improved.
Referring to fig. 7, taking the national standard rated condition as an example, the refrigeration energy efficiency (COP, coefficient Of Performance) of the centrifugal chiller using the single-stage compressor 400 is around 6.7. Ideally, the refrigerating energy can reach about 7.2 after the air supplementing measures are added. The theoretical refrigerating energy of the refrigerating and heating system can reach 14.2, which is improved by about 112 percent compared with the refrigerating system of the single-stage compressor 400.
The enthalpy drop generated during the expansion of the high pressure refrigerant in the first cavity 515 can be increased by about 7.2%, and the increase in the refrigerating capacity means that a smaller refrigerating apparatus can be used to achieve the same refrigerating effect.
At the same time, the load of the compressor 400 is reduced by about 50%, and the compressor 400 with smaller power can be used.
On the basis, the cost of the refrigerating and heating system is reduced.
In addition, the compressor 400 is a main noise source of the refrigerating and heating system, and the noise is smaller after the compressor 400 with smaller power is adopted.
The refrigerating and heating system has a simple structure, only a cavity with a diaphragm, a plurality of pipe valves and other parts are added on the conventional compression refrigerating system, and the structure is independent of the core parts of the original system, so that the reliability of the core parts such as the compressor 400 is not affected. Because the added device is a low-speed system, the condition of high-speed impact by the gas-liquid mixed working medium can not exist, and the service life is long.
The embodiment also provides an air conditioner comprising the refrigerating and heating system.
Example 2
Referring to fig. 8, the present embodiment provides a working method applied to the above-mentioned cooling and heating system, the working method includes the following steps:
s1, the isolation assembly 520 is made to be close to the inner wall of the first cavity 515, and the first check valve 511, the second check valve 512, the third check valve 513 and the fourth check valve 514 are closed.
S2, the first check valve 511 is opened, so that the high-pressure refrigerant from the condenser 100 enters the first cavity 515, and after the pressure of the first cavity 515 and the pressure of the second cavity 516 are balanced, the first check valve 511 is closed.
And S3, opening the fourth one-way valve 514 to discharge the compressed low-pressure refrigerant in the second cavity 516, and then closing the fourth one-way valve 514.
And S4, opening the second one-way valve 512 to discharge the high-pressure refrigerant after expansion in the first cavity 515.
S5, opening the third one-way valve 513, enabling the isolation assembly 520 to be close to the inner wall of the first cavity 515, and then closing the second one-way valve 512 and the third one-way valve 513.
Steps S2 to S5 are repeated to increase the cooling capacity and simultaneously reduce the power consumption of the compressor 400, thereby improving the cooling energy efficiency.
Any particular values in all examples shown and described herein are to be construed as merely illustrative and not a limitation, and thus other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
The above examples merely represent a few embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the present invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.
Claims (10)
1. A refrigerating and heating system is characterized by comprising a condenser, a throttle valve, an evaporator, a compressor and a compression expansion device;
the compression expansion device comprises a shell, an isolation assembly and a reset assembly, wherein the shell is connected with a first one-way valve, a second one-way valve, a third one-way valve and a fourth one-way valve, a first cavity and a second cavity are arranged in the shell, fluid in the first cavity can act on fluid in the second cavity through the isolation assembly, and the reset assembly is used for driving the isolation assembly to be close to the inner wall of the first cavity;
the inlet of the first cavity is communicated with the outlet of the condenser through the first one-way valve, the outlet of the first cavity is communicated with the inlet of the throttle valve through the second one-way valve, the inlet of the second cavity is communicated with the outlet of the evaporator through the third one-way valve, and the outlet of the second cavity is communicated with the inlet of the compressor through the fourth one-way valve.
2. The refrigeration and heating system of claim 1, wherein said housing has an interior cavity, said isolation assembly being disposed within said interior cavity, said isolation assembly separating said interior cavity to form said first and second cavities.
3. The refrigeration and heating system of claim 2, wherein the isolation assembly employs a first diaphragm fixedly connected to an inner wall of the cavity, the first diaphragm having elasticity.
4. The refrigeration and heating system of claim 2, wherein the isolation assembly employs a first piston slidably disposed within the interior cavity.
5. The refrigeration and heating system of claim 1, wherein the housing comprises a first housing having the first cavity and a second housing having the second cavity.
6. The refrigeration and heating system of claim 5, wherein the isolation assembly comprises a second diaphragm, a third diaphragm, and a first connector, the second diaphragm and the third diaphragm each having elasticity;
the second diaphragm is fixedly connected with the inner wall of the first cavity, the third diaphragm is fixedly connected with the inner wall of the second cavity, and the first connecting piece is respectively connected with the second diaphragm and the third diaphragm.
7. The refrigeration and heating system of claim 5, wherein the isolation assembly comprises a second piston, a third piston, and a second connector;
the second piston is arranged in the first cavity in a sliding mode, the third piston is arranged in the second cavity in a sliding mode, and the second connecting piece is connected with the second piston and the third piston respectively.
8. The refrigeration and heating system of any of claims 1-7, further comprising a buffer tank disposed between the condenser and the first one-way valve.
9. A method of operation for use in a refrigeration and heating system as recited in any one of claims 1-8, the method of operation comprising:
closing the first one-way valve, the second one-way valve, the third one-way valve and the fourth one-way valve by making the isolation assembly close to the inner wall of the first cavity;
opening the first one-way valve to enable the high-pressure refrigerant from the condenser to enter the first cavity, and closing the first one-way valve after the pressure of the first cavity and the pressure of the second cavity are balanced;
opening the fourth one-way valve to discharge the compressed low-pressure refrigerant in the second cavity, and then closing the fourth one-way valve;
opening the second one-way valve to discharge the high-pressure refrigerant after expansion in the first cavity;
and opening the third one-way valve to enable the isolation assembly to be close to the inner wall of the first cavity, and then closing the second one-way valve and the third one-way valve.
10. An air conditioner comprising the cooling and heating system according to any one of claims 1 to 8.
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