CN107192158A - Enthalpy increasing system of air conditioner and fixed-frequency air conditioner with same - Google Patents
Enthalpy increasing system of air conditioner and fixed-frequency air conditioner with same Download PDFInfo
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- CN107192158A CN107192158A CN201710441741.7A CN201710441741A CN107192158A CN 107192158 A CN107192158 A CN 107192158A CN 201710441741 A CN201710441741 A CN 201710441741A CN 107192158 A CN107192158 A CN 107192158A
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- 239000003507 refrigerant Substances 0.000 claims abstract description 60
- 239000013589 supplement Substances 0.000 claims abstract description 15
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/05—Cost reduction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides an enthalpy increasing system of an air conditioner and a fixed-frequency air conditioner with the same. The air conditioner enthalpy increasing system comprises: the compressor is provided with an air supplement port, the flash engine is provided with an air exhaust port, one end of the air supplement pipeline is communicated with the air supplement port, the other end of the air supplement pipeline is communicated with the air exhaust port, and the flash engine supplements air to the compressor through the air supplement pipeline. The mechanical valve is arranged on the air supply pipeline, and the opening degree of the mechanical valve is adjustably arranged according to the pressure difference between the two ends of the mechanical valve. The mechanical valve is arranged on the air supply pipeline between the compressor and the flash tank, and the pressure of the refrigerant in the air supply pipeline is used for controlling the mechanical valve, so that the opening degree of the mechanical valve can be adjusted in real time according to the pressure working condition in the pipeline of the air conditioner system, and the heating and refrigerating performances of the air conditioner are effectively improved. Meanwhile, the problem that the electromagnetic valve in the prior art needs to be additionally provided with a mainboard and a connecting wire to cause high production cost of the air conditioner can be avoided. The production cost of the air conditioner with the enthalpy increasing system is effectively reduced.
Description
Technical Field
The invention relates to the technical field of air conditioner equipment, in particular to an enthalpy increasing system of an air conditioner and a fixed-frequency air conditioner with the same.
Background
The traditional fixed-frequency air conditioner usually adopts a single-stage compression system due to simple structure and low cost. However, in the ultra-high temperature and ultra-low temperature areas, the single-stage compressor has low refrigerant flow and greatly reduced capacity due to large pressure ratio during operation. Compared with a conventional system, the double-stage compression air-supply enthalpy-increasing system has the advantages of small compression ratio, low exhaust temperature, high refrigeration efficiency and the like. However, the two-stage compression enthalpy-increasing system needs to realize enthalpy-increasing control by an electronic expansion valve, a temperature sensing bulb, an electromagnetic two-way valve, a control mainboard and the like. Moreover, it is currently applied only to variable frequency air conditioners. And because the fixed frequency air conditioner is simple in structure, if the control scheme of the frequency converter is adopted to realize enthalpy increase control, parts such as a temperature sensing bulb, an electromagnetic valve, a main board and a connecting wire need to be added, so that the conditions of high production cost, low production efficiency, poor economic benefit and the like of the air conditioner are caused.
Generally, an enthalpy-increasing circulation system is controlled by adopting a combination mode of an electromagnetic stop valve, a temperature sensing bulb and a control panel, so that the enthalpy-increasing system is complex in structure, needs to be provided with special software control logic, is high in cost and complex in control, and is inconvenient to install and maintain after sale. Especially, the setting mode of the stop valve adopted in the prior art makes the stop valve in the enthalpy-increasing system be in either a closed state or an open state, namely, the setting mode of the stop valve in the prior art is adopted, the opening degree of the stop valve cannot be adjusted, and the problem of poor refrigeration or heating of the air conditioner is easily caused.
Disclosure of Invention
The invention mainly aims to provide an enthalpy-increasing system of an air conditioner and a fixed-frequency air conditioner with the same, so as to solve the problem that the refrigeration or heating of the air conditioner in the enthalpy-increasing system in the prior art is poor.
In order to achieve the above object, according to one aspect of the present invention, there is provided an enthalpy adding system of an air conditioner, including: a compressor having an air supplement port; a flash tank having an exhaust port; one end of the air supply pipeline is communicated with the air supply port, the other end of the air supply pipeline is communicated with the air exhaust port, and the flash tank is used for introducing a refrigerant into the compressor through the air supply pipeline so as to supply air; and the mechanical valve is arranged on the air supply pipeline, and the opening degree of the mechanical valve is adjustably arranged according to the pressure difference between the two ends of the mechanical valve.
Further, the design pressure parameter of the mechanical valve when the opening degree of the mechanical valve is fully opened is obtained by the following formula: wherein K is a pressure design parameter; p1 is the low pressure design pressure; p2 is high pressure design pressure; p0 is the design pressure parameter of the mechanical valve when the opening of the mechanical valve is fully open.
Further, the opening degree of the mechanical valve is obtained by the following formula: m ═ P-P0)/a, where M is the opening degree of the mechanical valve; px is a real-time pressure value of one end of the gas supplementing pipeline close to the flash tank; and a is a mechanical valve design parameter.
Further, when M is less than or equal to-1, the mechanical valve is in a closed state; when M is more than-1 and less than 0, the mechanical valve is in a partially opened state according to the pressure value of the air supply pipeline; when M is more than or equal to 0, the mechanical valve is in a fully open state.
Further, a is more than or equal to 0.05 and less than or equal to 0.2, wherein a is a mechanical valve design parameter.
Further, K is more than or equal to 0.95 and less than or equal to 1.05, wherein K is a pressure design parameter.
Further, the refrigerant comprises one of R410A, R22, R32, R290 and R134 a; when the refrigerant is R410A, the pressure of P1 is more than or equal to 1.0MPa and less than or equal to 1.3MPa, or when the refrigerant is R22, the pressure of P1 is more than or equal to 0.8MPa, or when the refrigerant is R32, the pressure of P1 is more than or equal to 1.0MPa and less than or equal to 1.3MPa, or when the refrigerant is R290, the pressure of P1 is more than or equal to 0.8MPa, or when the refrigerant is R134a, the pressure of P1 is more than or equal to 0.3 MPa.
Further, when the refrigerant is R410A, 3.0 MPa-P2-3.9 MPa, or, when the refrigerant is R22, 1.9 MPa-P2-2.5 MPa, or, when the refrigerant is R32, 3.1 MPa-P2-4.0 MPa, or, when the refrigerant is R290, 1.7 MPa-P2-2.2 MPa, or, when the refrigerant is R134a, 1.3 MPa-P2-1.7 MPa.
Further, when the refrigerant is R410A, 1.6 MPa-P0-2.4 MPa, or, when the refrigerant is R22, 1.0 MPa-P0-1.5 MPa, or, when the refrigerant is R32, 1.6 MPa-P0-2.4 MPa, or, when the refrigerant is R290, 0.8 MPa-P0-1.4 MPa, or, when the refrigerant is R134a, 0.5 MPa-P0-1.0 MPa.
Further, the compressor is a multi-stage compressor.
According to another aspect of the present invention, there is provided a fixed frequency air conditioner, including an air conditioner enthalpy increasing system, where the air conditioner enthalpy increasing system is the above air conditioner enthalpy increasing system.
By applying the technical scheme of the invention, the mechanical valve is arranged on the air supply pipeline between the compressor and the flash tank, and the pressure of the refrigerant in the air supply pipeline is utilized to control the mechanical valve, so that the opening degree of the mechanical valve can be adjusted in real time according to the pressure working condition in the pipeline of the air conditioner system, and the heating and refrigerating performances of the air conditioner are effectively improved. Meanwhile, the problem that the production cost of the air conditioner is high due to the fact that a mainboard and a connecting wire are additionally arranged when the electromagnetic valve in the prior art is adopted can be avoided. By adopting the enthalpy-increasing system of the air conditioner, the production cost of the air conditioner with the enthalpy-increasing system can be effectively reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows a schematic structural diagram of an embodiment of an enthalpy addition system according to the present invention;
fig. 2 shows a schematic diagram of the vapor-filling enthalpy-increasing effect of the compressor.
Wherein the figures include the following reference numerals:
10. a compressor; 20. an evaporator; 30. a flash tank; 40. a condenser; 50. a throttle valve; 60. a four-way valve; 70. a mechanical valve.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.
Referring to fig. 1 and 2, according to an embodiment of the present invention, an enthalpy increasing system of an air conditioner is provided.
Specifically, as shown in fig. 1, the system for increasing enthalpy of an air conditioner includes a compressor 10, a flash tank 30, and a mechanical valve 70. The compressor 10 has a supply port. The flash tank 30 has an exhaust port, one end of the air supply pipeline is communicated with the air supply port, the other end of the air supply pipeline is communicated with the exhaust port, and the flash tank supplies refrigerant into the compressor through the air supply pipeline to supply air. The mechanical valve 70 is disposed on the air supply line, and the opening degree of the mechanical valve 70 is adjustably set according to the pressure difference of the refrigerant at both ends of the mechanical valve.
In this embodiment, the mechanical valve 70 is disposed on the air supply line between the compressor 10 and the flash tank 20, and the pressure of the refrigerant in the air supply line is used to control the mechanical valve 70, so that the opening degree of the mechanical valve 70 can be adjusted in real time according to the pressure condition in the line of the air conditioner system, thereby effectively improving the heating and cooling performance of the air conditioner. Meanwhile, the problem that the production cost of the air conditioner is high due to the fact that a mainboard and a connecting wire are additionally arranged when the electromagnetic valve in the prior art is adopted can be avoided. By adopting the enthalpy-increasing system of the air conditioner, the production cost of the air conditioner with the enthalpy-increasing system can be effectively reduced.
Wherein the opening degree of the mechanical valve 70 is obtained by the following formula: m is (Px-P0)/a, M is the opening degree of the mechanical valve 70, Px is the real-time pressure value of the end of the gas supply line close to the flash tank, P0 is the design pressure parameter of the mechanical valve when the opening degree of the mechanical valve 70 is fully opened, and a is the design parameter of the mechanical valve 70.
When M is less than or equal to-1, the mechanical valve 70 is in a closed state, when-1 is less than or equal to M and less than 0, the mechanical valve 70 is in a partially opened state according to the pressure value of the gas supplementing pipeline, and when M is less than or equal to 0, the mechanical valve 70 is in a fully opened state. The arrangement can adjust the opening degree of the mechanical valve 70 according to the internal pressure in the air conditioner pipeline system, so that the opening degree of the mechanical valve 70 is adjusted in a self-adaptive mode through the mechanical valve 70, the air supplement amount of the system to the compressor is adjusted, and the overall energy efficiency of the system is improved.
Preferably, 0.05 ≦ a ≦ 0.2, where a is a mechanical valve design parameter. The arrangement can effectively improve the reliability of the adjustable opening degree of the mechanical valve 70 during operation.
Specifically, P0 is obtained by the following formula:wherein K is a pressure design parameter, P1 is a low pressure design pressure, and P2 is a high pressure design pressure. The value range of K is preferably as follows: k is more than or equal to 0.95 and less than or equal to 1.05.
In the present embodiment, the refrigerant includes one of R410A, R22, R32, R290, and R134 a. When the refrigerant is R410A, the pressure of P1 is more than or equal to 1.0MPa and less than or equal to 1.3MPa, or when the refrigerant is R22, the pressure of P1 is more than or equal to 0.8MPa, or when the refrigerant is R32, the pressure of P1 is more than or equal to 1.0MPa and less than or equal to 1.3MPa, or when the refrigerant is R290, the pressure of P1 is more than or equal to 0.8MPa, or when the refrigerant is R134a, the pressure of P1 is more than or equal to 0.3 MPa.
When the refrigerant is R410A, 3.0 MPa-P2-3.9 MPa, or when the refrigerant is R22, 1.9 MPa-P2-2.5 MPa, or when the refrigerant is R32, 3.1 MPa-P2-4.0 MPa, or when the refrigerant is R290, 1.7 MPa-P2-2.2 MPa, or when the refrigerant is R134a, 1.3 MPa-P2-1.7 MPa.
When the refrigerant is R410A, the pressure of P0 is more than or equal to 1.6MPa and less than or equal to 2.4MPa, or when the refrigerant is R22, the pressure of P0 is more than or equal to 1.0MPa and less than or equal to 1.5MPa, or when the refrigerant is R32, the pressure of P0 is more than or equal to 1.6MPa and less than or equal to 2.4MPa, or when the refrigerant is R290, the pressure of P0 is more than or equal to 0.8MPa and less than or equal to 1.4MPa, or when the refrigerant is R134a, the pressure of P0 is more than or equal to 0.5MPa and.
In this embodiment, the design parameter a, the pressure design parameter K, the low-pressure design pressure P1, the high-pressure design pressure P2, and the pressure value P0 in the air supply line when the opening degree of the mechanical valve 70 is fully opened may be determined according to the type of the refrigerant introduced into the air conditioning system, so as to determine the opening degree M of the mechanical valve 70.
Preferably, in this embodiment, the compressor may be a multi-stage compressor, that is, the compressor may be a two-stage compressor, which can effectively improve the cooling and heating performance of the air conditioner with the enthalpy increasing system.
The enthalpy increasing system of the air conditioner in the above embodiment can also be used in the technical field of air conditioner equipment, that is, according to another aspect of the present invention, a fixed frequency air conditioner is provided. The constant-frequency air conditioner comprises an air conditioner enthalpy increasing system, and the air conditioner enthalpy increasing system is the air conditioner enthalpy increasing system in the embodiment. Specifically, the system includes an air conditioner enthalpy increasing system including a compressor 10, a flash tank 30, and a mechanical valve 70. The compressor 10 has a supply port. The flash tank 30 has an exhaust port, one end of the air supply pipeline is communicated with the air supply port, the other end of the air supply pipeline is communicated with the exhaust port, and the flash tank supplies air to the compressor through the air supply pipeline. The mechanical valve 70 is provided in the air supply line, and the opening degree of the mechanical valve 70 is set to be adjustable according to the pressure of the refrigerant in the air supply line. Wherein, the air conditioner also comprises an evaporator 20, a condenser 20, and a throttle valve 50 and a four-way valve 60 which are arranged on the pipeline system of the air conditioner.
In this embodiment, the mechanical valve 70 is disposed on the air supply pipeline between the compressor 10 and the flash tank 20, and the mechanical valve 70 is controlled by using the pressure difference between the two ends of the mechanical valve, so that the opening of the mechanical valve 70 can be adjusted in real time according to the pressure condition in the pipeline of the air conditioner system, thereby effectively improving the heating and cooling performance of the air conditioner. Meanwhile, the problem that the production cost of the air conditioner is high due to the fact that a main board and a connecting line need to be additionally arranged when the electromagnetic valve in the prior art is adopted by adopting the arrangement mode of the mechanical valve 70 can be solved. By adopting the enthalpy-increasing system of the air conditioner, the production cost of the air conditioner with the enthalpy-increasing system can be effectively reduced.
Specifically, in the present embodiment, the compressor is a two-stage compressor, and generally, the enthalpy-increasing circulation system is controlled by a combination of an electromagnetic stop valve, a temperature sensing bulb and a control board, and the structure is complex and requires special logic control software, so that the air conditioner is high in manufacturing cost, complex to control, and inconvenient to install and maintain after sale.
In the embodiment, a mechanical valve is adopted to replace an electromagnetic stop valve, and the mechanical valve automatically opens or closes the valve core by sensing the pressure of a system. According to the control process, elements such as a temperature sensing bulb and a mainboard are not required to be additionally added, related control elements and electric circuits are reduced, the production cost of the whole air conditioner is effectively saved, the production efficiency of the air conditioner is improved, and the efficiency of after-sale installation and maintenance of the air conditioner is improved.
Further, the conventional electromagnetic stop valve can only open and close the valve element, and cannot adjust the opening degree of the valve element, but the mechanical valve 70 in this embodiment can adaptively adjust the opening degree of the valve element of the mechanical valve 70 according to the pressure change of the air conditioner system, so as to adjust the air supplement amount of the enthalpy-increasing system of the air conditioner, and enable the system performance to be in the best state.
The traditional electromagnetic stop valve needs power consumption, the energy consumption of the system can be increased, and the mechanical valve 70 adopting the pressure self-starting type does not need power consumption, so that the power consumption of the system can be reduced, and the complete machine energy efficiency of the air conditioner can be effectively improved.
The circulation schematic diagram of the vapor-supplementing enthalpy-increasing system is shown in fig. 2, and the traditional two-stage vapor-supplementing system senses the outside temperature of the compressor, the running frequency of the compressor and controls the opening and closing time of the vapor-supplementing valve. The traditional double-stage air supply system needs a special air supply valve control main board and software control logic, and is easy to cause the false opening or false closing of the air supply valve. In the compressor, the system intermediate pressure is low in the low load state and high in the high load state, as shown in fig. 1, a mechanical valve 70 is adopted, and the mechanical valve 70 controls whether the air supply pipe supplies air to the compressor by sensing the pressure of the refrigerant in the air conditioner system.
The enthalpy-increasing system of the air conditioner in the embodiment has a simple and practical structure, and a control mainboard is not required to be arranged to control the mechanical valve, so that the condition that the mechanical valve 70 is opened by mistake or closed by mistake does not exist. In addition, as can be seen from the air-supply enthalpy-increase pressure-enthalpy diagram in fig. 2, the cycle diagram of the ordinary single-stage system is 1 → 2 ' → 3 ' → 4 ', and the cycle diagram of the air-supply enthalpy-increase system is 1 → 7 → 6 → 2 → 3 → 4, when the air-supply enthalpy is turned on, Δ W ═ mi × (h 2-h 1) is increased relative to the power consumption of the ordinary compressor, so that when the system is in a low-load operation condition, if the air-supply is performed on the compressor, the energy efficiency of the whole machine is adversely affected, the air-supply to the compressor should be stopped, and the whole machine can be ensured to be kept in an optimal operation. However, in the prior art, the air supply valves are all voltage switches or electronic expansion valves, and the voltage switches and the electronic expansion valves are easily turned off by mistake or turned on by mistake, and when air supply needs to be performed to the compressor, the voltage switches or the electronic expansion valves are in a state of turning off by mistake, and when air supply needs to be stopped to the compressor, the voltage switches or the electronic expansion valves are in a state of turning on by mistake, so that the energy efficiency of the whole machine is reduced. Where mi is the refrigerant flow rate, h1 is the abscissa of 1 in fig. 2, and h2 is the abscissa of 2 in fig. 2.
In addition to the foregoing, it should be noted that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally throughout this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. An enthalpy adding system of an air conditioner, comprising:
a compressor having an air supplement port;
a flash tank having an exhaust port;
one end of the air supplement pipeline is communicated with the air supplement port, the other end of the air supplement pipeline is communicated with the air exhaust port, and the flash tank is used for introducing a refrigerant into the compressor through the air supplement pipeline to supplement air;
and the mechanical valve is arranged on the air supply pipeline, and the opening degree of the mechanical valve is adjustably arranged according to the pressure difference between the two ends of the mechanical valve.
2. An enthalpy adding system for an air conditioner according to claim 1, wherein the design pressure parameter of the mechanical valve when the opening degree of the mechanical valve is fully opened is obtained by the following formula:
wherein,
k is a pressure design parameter;
p1 is the low pressure design pressure;
p2 is high pressure design pressure;
p0 is the design pressure parameter of the mechanical valve when the opening of the mechanical valve is fully opened.
3. An enthalpy addition system of an air conditioner according to claim 2, wherein the opening degree of the mechanical valve is obtained by the following formula:
m ═ P-P0)/a, where,
m is the opening degree of the mechanical valve;
px is a real-time pressure value of one end, close to the flash tank, of the gas supplementing pipeline;
and a is the design parameter of the mechanical valve.
4. An enthalpy adding system of an air conditioner according to claim 3,
when M is less than or equal to-1, the mechanical valve is in a closed state;
when the pressure value of the air supply pipeline is-1 < M < 0, the mechanical valve is in a partially opened state according to the pressure value of the air supply pipeline;
and when M is more than or equal to 0, the mechanical valve is in a fully opened state.
5. An enthalpy adding system of an air conditioner according to claim 3, wherein a is 0.05 ≦ a ≦ 0.2, wherein a is the mechanical valve design parameter.
6. An enthalpy adding system of an air conditioner according to claim 2, wherein K is 0.95 ≦ K ≦ 1.05, where K is a pressure design parameter.
7. An enthalpy adding system of an air conditioner according to claim 2, wherein the refrigerant includes one of R410A, R22, R32, R290, R134 a;
wherein, when the refrigerant is R410A, the pressure of P1 is more than or equal to 1.0MPa and less than or equal to 1.3MPa, or,
when the refrigerant is R22, the pressure of P1 is more than or equal to 0.6MPa and less than or equal to 0.8MPa, or,
when the refrigerant is R32, the pressure of P1 is more than or equal to 1.0MPa and less than or equal to 1.3MPa, or,
when the refrigerant is R290, the pressure of P1 is more than or equal to 0.5MPa and less than or equal to 0.8MPa, or,
when the refrigerant is R134a, the pressure of P1 is more than or equal to 0.3MPa and less than or equal to 0.5 MPa.
8. An enthalpy adding system of an air conditioner according to claim 7,
when the refrigerant is R410A, the pressure of P2 is more than or equal to 3.0MPa and less than or equal to 3.9MPa, or,
when the refrigerant is R22, the pressure of P2 is more than or equal to 1.9MPa and less than or equal to 2.5MPa, or,
when the refrigerant is R32, the pressure of P2 is more than or equal to 3.1MPa and less than or equal to 4.0MPa, or,
when the refrigerant is R290, the pressure of P2 is more than or equal to 1.7MPa and less than or equal to 2.2MPa, or,
when the refrigerant is R134a, the pressure of P2 is more than or equal to 1.3MPa and less than or equal to 1.7 MPa.
9. An enthalpy adding system of an air conditioner according to claim 7 or 8,
when the refrigerant is R410A, the pressure of P0 is more than or equal to 1.6MPa and less than or equal to 2.4MPa, or,
when the refrigerant is R22, the pressure of P0 is more than or equal to 1.0MPa and less than or equal to 1.5MPa, or,
when the refrigerant is R32, the pressure of P0 is more than or equal to 1.6MPa and less than or equal to 2.4MPa, or,
when the refrigerant is R290, the pressure of P0 is more than or equal to 0.8MPa and less than or equal to 1.4MPa, or,
when the refrigerant is R134a, the P0 is more than or equal to 0.5MPa and less than or equal to 1.0 MPa.
10. An air conditioner enthalpy adding system according to claim 1, wherein the compressor is a multi-stage compressor.
11. A fixed frequency air conditioner comprising an air conditioner enthalpy increasing system, wherein the air conditioner enthalpy increasing system is the air conditioner enthalpy increasing system according to any one of claims 1 to 10.
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| PCT/CN2017/117908 WO2018227920A1 (en) | 2017-06-12 | 2017-12-22 | Enthalpy increasing system for air conditioner and non-inverter air conditioner having same |
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| CN107192158B (en) | 2023-07-14 |
| WO2018227920A1 (en) | 2018-12-20 |
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