CN113324361A - Refrigerating system, refrigerant filling method and refrigerating equipment - Google Patents

Refrigerating system, refrigerant filling method and refrigerating equipment Download PDF

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Publication number
CN113324361A
CN113324361A CN202010088820.6A CN202010088820A CN113324361A CN 113324361 A CN113324361 A CN 113324361A CN 202010088820 A CN202010088820 A CN 202010088820A CN 113324361 A CN113324361 A CN 113324361A
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China
Prior art keywords
refrigerant
evaporator
communicated
filling
port
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Granted
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CN202010088820.6A
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Chinese (zh)
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CN113324361B (en
Inventor
盛庆赫
瞿赛
唐学强
唐云
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Hefei Hualing Co Ltd
Midea Group Co Ltd
Hefei Midea Refrigerator Co Ltd
Original Assignee
Hefei Hualing Co Ltd
Midea Group Co Ltd
Hefei Midea Refrigerator Co Ltd
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Priority to CN202010088820.6A priority Critical patent/CN113324361B/en
Publication of CN113324361A publication Critical patent/CN113324361A/en
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Publication of CN113324361B publication Critical patent/CN113324361B/en
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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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • 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
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • 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
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • 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
    • F25B45/00—Arrangements for charging or discharging refrigerant
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
    • F25D19/003—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors with respect to movable containers
    • 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)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Drying Of Solid Materials (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

The invention provides a refrigerating system, a refrigerant filling method and refrigerating equipment. Wherein, refrigerating system includes: the compressor is provided with an exhaust port, a return air port and a first charging port; one end of the condenser is communicated with the exhaust port; one end of the first evaporator is communicated with the other end of the condenser; one end of the second evaporator is communicated with the other end of the first evaporator, and the other end of the second evaporator is communicated with the air return port; two ends of the first throttling element are respectively communicated with the other end of the condenser and one end of the second evaporator; the inlet of the valve body is communicated with the other end of the condenser, the first outlet of the valve body is communicated with one end of the first evaporator, and the second outlet of the valve body is communicated with the first throttling element; the two ends of the dryer are respectively communicated with the condenser and the inlet of the valve body, and the dryer is provided with a second filling port. The refrigerating system provided by the invention can ensure that the mixed refrigerant is filled without arranging a premixing device, thereby greatly saving the cost.

Description

Refrigerating system, refrigerant filling method and refrigerating equipment
Technical Field
The invention relates to the technical field of refrigeration, in particular to a refrigeration system, a refrigerant filling method and refrigeration equipment.
Background
In order to realize the function of low-temperature refrigeration, the prior art usually realizes low-temperature refrigeration by applying a mixed refrigerant to enable a compartment to reach a lower evaporation temperature, but the mixed refrigerant usually needs premixing equipment in filling, and the cost investment is large.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, a first aspect of the invention proposes a refrigeration system.
The second aspect of the present invention provides a refrigerant filling method.
A third aspect of the present invention is to provide a refrigeration apparatus.
In view of this, a first aspect of the present invention provides a refrigeration system comprising: the compressor, the compressor is provided with gas vent, return-air inlet and first notes mouth of filling, fills and annotates the mixed refrigerant in the compressor, and the mixed refrigerant includes at least: a first refrigerant and a second refrigerant; one end of the condenser is communicated with the exhaust port; one end of the first evaporator is communicated with the other end of the condenser; one end of the second evaporator is communicated with the other end of the first evaporator, and the other end of the second evaporator is communicated with the air return port; the two ends of the first throttling element are respectively communicated with the other end of the condenser and one end of the second evaporator; the inlet of the valve body is communicated with the other end of the condenser, the first outlet of the valve body is communicated with one end of the first evaporator, and the second outlet of the valve body is communicated with the first throttling element; the two ends of the dryer are respectively communicated with the condenser and the inlet of the valve body, and the dryer is provided with a second filling port; wherein the valve body is configured to be suitable for switching the flow direction of the mixed refrigerant.
According to the refrigeration system provided by the invention, through the arrangement of the compressor, the condenser, the first evaporator, the second evaporator, the first throttling element, the valve body and the dryer, the mixed refrigerant can be poured without arranging premixing equipment, and the cost is greatly saved.
Specifically, the compressor is provided with an exhaust port, a return port, and a first charging port. The refrigerant is circulated into the compressor through the air return port, the refrigerant is compressed in the compressor, and after the pressure and the temperature of the refrigerant are improved, the refrigerant enters the refrigerating system through the air exhaust port. The first refrigerant can be charged through the first charging port. The dryer is provided with a second fill port that can be connected to a charger to charge a second refrigerant through the second fill port. After the completion fills and annotates, the compressor starts, and the valve body switches on, and two kinds of refrigerants intensive mixing have accomplished the filling and filling of mixed refrigerant.
Further, one end of the condenser is communicated with the exhaust port, so that heat of the high-temperature and high-pressure refrigerant gas sent by the compressor is radiated to the external space through the effect of the condenser. The refrigerant is liquefied after heat dissipation and cooling to form high-pressure and normal-temperature refrigerant liquid. One end of the first evaporator is communicated with the other end of the condenser and is used for absorbing heat in the evaporation of the first refrigerant. One end of the second evaporator is communicated with the other end of the first evaporator, and the other end of the second evaporator is communicated with the air return port, so that the flow of the mixed refrigerant can form two independent loops. One circuit can enable the mixed refrigerant to pass through only the second evaporator, and the other circuit can enable the mixed refrigerant to pass through both the first evaporator and the second evaporator, so that the use requirements of users are met. The second evaporator is in circuit for absorbing heat from the evaporation of the second refrigerant. The two ends of the first throttling element are respectively communicated with the other end of the condenser and one end of the second evaporator, and the flow and the pressure of the refrigerant entering the second evaporator can be adjusted through the first throttling element. The inlet of the valve body is communicated with the other end of the condenser, the first outlet of the valve body is communicated with one end of the first evaporator, and the second outlet of the valve body is communicated with the first throttling element. Through the setting of valve body, can adjust the state that different return circuits switched on and closed to change the flow direction of mixed refrigerant. The two ends of the dryer are respectively communicated with the condenser and the inlet of the valve body, so that the moisture of the refrigerants in different loops is absorbed, and the ice blockage in the refrigerating system is avoided.
The mixed refrigerant is filled in the refrigerating system, so that lower evaporation temperature can be obtained in the refrigerating process, and low-temperature refrigeration is realized. The mixed refrigerant at least comprises a first refrigerant and a second refrigerant, so that a plurality of refrigerants are mixed, the refrigerating system can realize at least two refrigerating temperatures, can be switched between the two refrigerating temperatures according to actual needs to meet different refrigerating requirements of users, and reduces energy consumption in the operation process of the refrigerating system.
In addition, according to the refrigeration system in the above technical solution provided by the present invention, the following additional technical features may also be provided:
in the above technical solution, further, the refrigeration system further includes: the two ends of the second throttling piece are respectively communicated with the first outlet of the valve body and one end of the first evaporator; the valve body is an electric valve.
In the technical scheme, two ends of the second throttling element are respectively communicated with the first outlet of the valve body and one end of the first evaporator, and the flow and the pressure of the refrigerant entering the first evaporator can be adjusted through the second throttling element. The electric valve is used as a valve body, so that the control of the conduction and the stop of the refrigeration loop is more convenient and efficient.
In any of the above technical solutions, further, the refrigeration system further includes: and the two ends of the stop valve are respectively connected with the exhaust port of the compressor and one end of the condenser.
In the technical scheme, two ends of the stop valve are respectively connected with an exhaust port of the compressor and one end of the condenser, and the on-off of the refrigeration loop can be manually or automatically controlled through the on-off of the stop valve. When the refrigerant needs to be filled, the stop valve is controlled to be closed, the refrigeration loop is disconnected at the moment, and the refrigeration system stops working; when normal refrigeration work is needed after filling, the stop valve is controlled to be opened, the refrigeration loop is communicated at the moment, and the refrigeration system works normally.
In any of the above technical solutions, further, the refrigeration system further includes: the filling connector is arranged on each of the first filling port and the second filling port.
In this technical scheme, all set up the filling joint on first notes mouth and the second fills the mouth to make and fill the machine and be connected with refrigerating system and have good sealed, take place to reveal when avoiding injecting refrigerant into refrigerating system.
In any one of the above technical solutions, further, based on the compressor being in a stop operation state, the return air port and the filling port are not communicated with the exhaust port.
In this technical scheme, when the compressor stopped to operate, make return air port and gas vent each other not communicate, fill notes mouth and gas vent also not mutually communicate. Set up like this, when filling the notes, the refrigerant can only get into the second evaporimeter through filling the notes mouth and return air inlet, and can't get into the exhaust pipe to make refrigerating system normal operating, the refrigerant that fills can improve pressure and temperature through the compressor completely and get into the condenser again.
In the above technical solution, further, the evaporation temperature of the first refrigerant is different from the evaporation temperature of the second refrigerant.
In the technical scheme, the evaporation temperature of the first refrigerant and the evaporation temperature of the second refrigerant are enabled, so that the corresponding first evaporator and the corresponding second evaporator obtain different temperatures after the refrigerants are evaporated to meet the requirements of users.
In any of the above technical solutions, further, the first refrigerant is an ethane refrigerant, and the second refrigerant is an isobutane refrigerant; or the first refrigerant is propane refrigerant and the second refrigerant is isobutane refrigerant.
In the technical scheme, the first refrigerant in the mixed refrigerant is an ethane refrigerant, namely R170, and the second refrigerant is an isobutane refrigerant, namely R600a, although the first refrigerant in the mixed refrigerant may also be a propane refrigerant, namely R290, and both of the first refrigerant and the second refrigerant can achieve at least two refrigeration temperatures. Wherein, R170 and R290 can realize refrigeration with lower temperature, that is, deep refrigeration of the refrigeration system.
The second aspect of the present invention provides a refrigerant filling method for a refrigeration system according to any of the above technical solutions, wherein the refrigerant filling method includes: the control valve body is in a closed state, and a stop valve of the refrigeration system is in an open circuit state; connecting a first filling machine based on the first filling port, connecting a second filling port with a second filling machine, and controlling to fill; and controlling the valve body and the stop valve to be communicated and controlling the compressor to operate based on the condition of finishing charging.
According to the refrigerant filling method provided by the invention, the refrigeration loop is disconnected firstly, then the refrigeration system is connected with the two filling machines respectively for filling different refrigerants, the refrigeration loop is conducted after filling is finished, and the operation of the compressor is controlled, so that the filling of different refrigerants is realized under the condition that the refrigeration system does not need to be additionally provided with the premixing equipment, and the cost is greatly saved.
Specifically, the first charging port charges one of the first refrigerant and the second refrigerant, and the second charging port charges the other of the first refrigerant and the second refrigerant.
In the above technical solution, further, before the first filling port is connected to the first filling machine and the second filling port is connected to the second filling machine, the method further includes: and the first filling port and the second filling port are respectively connected with a vacuum pump, so that the vacuum pump is controlled to operate and vacuumize.
In this technical scheme, before filling mouthful connecting the machine of filling, will fill mouthful with two and connect the vacuum pump respectively earlier, control the vacuum pump operation again and carry out the evacuation operation, make the moisture in the refrigerating system take out along with the air and separate, avoid refrigerating system to take place ice stifled.
A third aspect of the present invention provides a refrigeration apparatus including the refrigeration system of any of the first aspects.
In the above technical solution, further, the refrigeration equipment further includes: the box body is provided with a first chamber and a second chamber; a first evaporator of the refrigeration system is configured to refrigerate the first compartment and a second evaporator is configured to refrigerate the second compartment.
In this technical scheme, be provided with first compartment and second compartment in the box and be used for storing edible material or food, specifically, first evaporimeter is corresponding to refrigerate with first compartment, and the second evaporimeter is used for refrigerating the second compartment, because of the mixed refrigerant that injects into among the refrigerating system, and then can realize satisfying different demands to the refrigeration temperature of first compartment and second compartment, can obtain lower evaporating temperature in the refrigeration process, realize low temperature freezing. Furthermore, the mixed refrigerant at least comprises the first refrigerant and the second refrigerant, so that a plurality of refrigerants are mixed, and a better refrigeration effect is realized.
The refrigeration equipment provided by the invention comprises the refrigeration system in any technical scheme of the first aspect, so that the refrigeration equipment has all the beneficial effects of the refrigeration system.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a refrigeration system according to an embodiment of the first aspect of the present invention.
Wherein, the corresponding relationship between the reference numbers and the component names in fig. 1 is:
1 refrigeration system, 100 compressor, 110 first fill port, 120 process tube, 200 condenser, 310 first evaporator, 320 second evaporator, 410 first throttle, 420 second throttle, 500 valve body, 600 dryer, 610 second fill port, 700 shut-off valve, 810 first filler, 820 second filler.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
A refrigeration system 1 and a refrigerant charging method according to some embodiments of the present invention are described below with reference to fig. 1.
Example one
As shown in fig. 1, an embodiment of a first aspect of the present invention provides a refrigeration system 1, including: the compressor 100, the condenser 200, the first evaporator 310, the second evaporator 320, the first throttle 410, the valve body 500, and the dryer 600.
Wherein, compressor 100 is provided with gas vent, return-air inlet and first filling mouth 110, fills mixed refrigerant in the compressor 100, and mixed refrigerant includes: a first refrigerant and a second refrigerant; one end of the condenser 200 is communicated with the exhaust port; one end of the first evaporator 310 communicates with the other end of the condenser 200; one end of the second evaporator 320 is communicated with the other end of the first evaporator 310, and the other end of the second evaporator 320 is communicated with the return air port; both ends of the first throttling element 410 are respectively communicated with the other end of the condenser 200 and one end of the second evaporator 320; an inlet of the valve body 500 is communicated with the other end of the condenser 200, a first outlet of the valve body 500 is communicated with one end of the first evaporator 310, and a second outlet of the valve body 500 is communicated with the first throttling element 410; both ends of the dryer 600 are respectively communicated with the condenser 200 and the inlet of the valve body 500, and the dryer 600 is provided with a second filling port 610; the valve body 500 is configured to be suitable for switching the flow direction of the mixed refrigerant.
According to the refrigeration system 1 provided by the embodiment, through the arrangement of the compressor 100, the condenser 200, the first evaporator 310, the second evaporator 320, the first throttling element 410, the valve body 500 and the dryer 600, the mixed refrigerant can be filled without arranging a premixing device, so that the cost is greatly saved.
Specifically, the compressor 100 is provided with a discharge port, a return port, and a first charging port 110. The refrigerant is introduced into the compressor 100 through the return port, compressed in the compressor 100, and introduced into the refrigeration system 1 through the discharge port after the pressure and temperature of the refrigerant are raised. The first refrigerant is charged through the first charge port 110. The mixed refrigerant is filled in the compressor 100, so that lower evaporation temperature can be obtained in the refrigeration process, and low-temperature refrigeration is realized. The mixed refrigerant at least comprises a first refrigerant and a second refrigerant, so that a plurality of refrigerants are mixed, and a better refrigeration effect is realized.
Specifically, one end of the condenser 200 communicates with the discharge port, so that heat of the high-temperature, high-pressure refrigerant gas sent from the compressor 100 is radiated to the external space by the condenser 200. The refrigerant is liquefied after heat dissipation and cooling to form high-pressure and normal-temperature refrigerant liquid.
Specifically, one end of the first evaporator 310 communicates with the other end of the condenser 200 for absorbing heat for evaporation of the first refrigerant.
Specifically, one end of the second evaporator 320 communicates with the other end of the first evaporator 310, and the other end of the second evaporator 320 communicates with the return port, so that the flow of the mixed refrigerant can form two independent circuits. One circuit may pass the mixed refrigerant only through the second evaporator 320 and one circuit may pass the mixed refrigerant through both the first evaporator 310 and the second evaporator 320, thereby satisfying the user's use requirement. The second evaporator 320 is in circuit for absorbing heat for evaporation of the second refrigerant.
Specifically, both ends of the first throttling member 410 communicate with the other end of the condenser 200 and one end of the second evaporator 320, respectively, and the flow rate and pressure of the refrigerant entering the second evaporator 320 can be adjusted by the first throttling member 410.
Specifically, an inlet of the valve body 500 communicates with the other end of the condenser 200, a first outlet of the valve body 500 communicates with one end of the first evaporator 310, and a second outlet of the valve body 500 communicates with the first throttling member 410. Through the setting of valve body 500, the state that different return circuits switched on and off can be adjusted, thereby changing the flow direction of the mixed refrigerant.
Specifically, two ends of the dryer 600 are respectively communicated with the condenser 200 and the inlet of the valve body 500, so as to absorb moisture of the refrigerants in different loops and avoid ice blockage in the refrigeration system 1. The dryer 600 is provided with a second fill port 610. the second fill port 610 may be connected to a charger to charge a second refrigerant through the second fill port 610.
Example two
In the above embodiment, further, the evaporation temperature of the first refrigerant and the evaporation temperature of the second refrigerant are set so that the corresponding first evaporator 310 and second evaporator 320 obtain different temperatures after the refrigerants are evaporated to meet the needs of users.
Further, the first refrigerant is an ethane refrigerant, and the second refrigerant is an isobutane refrigerant; or the first refrigerant is propane refrigerant and the second refrigerant is isobutane refrigerant. The mixed refrigerant can generate different refrigeration effects through different combinations of the two refrigerants so as to meet the use requirements of different occasions.
Specifically, for the refrigerant system filled with the refrigerant mixture of R600a and R170, since the two refrigerants have non-azeotropic properties, when the refrigerant enters the first evaporator 310 after passing through the throttle to start evaporation, the R170 refrigerant evaporates first, and after the R170 evaporation is completed, the R600a evaporates, so that the evaporation temperature of the R170 is lower in the whole evaporation process, and then the evaporation temperature of the R600a is higher as the evaporation proceeds. By utilizing the characteristics, the evaporation temperature of the first evaporator 310 is controlled to be-50 ℃ so that the temperature of the deep cooling chamber can be controlled to be-18 ℃ to-40 ℃, the evaporation temperature of the second evaporator 320 is controlled to be-30 ℃, so that the temperature of the freezing chamber can be controlled to be-16 ℃ to-24 ℃, and the temperature of the refrigerating chamber can be controlled to be 0 ℃ to 10 ℃.
EXAMPLE III
As shown in fig. 1, in any of the above embodiments, further, the refrigeration system 1 further includes: and a second orifice 420. Both ends of the second orifice 420 are respectively communicated with the first outlet of the valve body 500 and one end of the first evaporator 310; the valve body 500 is an electric valve.
In this embodiment, the second orifice 420 is provided in communication with the first outlet of the valve body 500 and one end of the first evaporator 310, so that the second orifice 420 can adjust the flow rate and pressure of the refrigerant entering the first evaporator 310. The electric valve is used as the valve body 500, so that the control of the on-off of the refrigeration loop is more convenient and efficient.
Further, the refrigeration system 1 further includes: the filling joints, the first filling port 110 and the second filling port 610 are provided with filling joints.
In this embodiment, the filling joints are disposed on both the first filling port 110 and the second filling port 610, so that the filling machine is connected with the refrigeration system 1 and has good sealing, and leakage is avoided when the refrigerant is injected into the refrigeration system 1.
Further, the refrigeration system 1 further includes: and a stop valve 700, both ends of the stop valve 700 being connected to the discharge port of the compressor 100 and one end of the condenser 200, respectively.
In this embodiment, both ends of the stop valve 700 are respectively connected to the discharge port of the compressor 100 and one end of the condenser 200, and the on/off of the refrigeration circuit can be manually or automatically controlled by turning on/off the stop valve 700. When the refrigerant needs to be filled, the stop valve 700 is controlled to be closed, the refrigeration circuit is disconnected at the moment, and the refrigeration system 1 stops working; when normal refrigeration work is required after filling, the control stop valve 700 is opened, the refrigeration circuit is communicated at the moment, and the refrigeration system 1 works normally.
Further, both the return port and the charge port are not communicated with the discharge port based on the compressor 100 being in the stopped state. When the compressor 100 stops operating, the return port and the exhaust port are not communicated with each other, and the charge port and the exhaust port are also not communicated with each other. With this arrangement, when the refrigerant is filled, the refrigerant can only enter the second evaporator 320 through the filling port and the return port, but cannot enter the discharge line, so that when the refrigeration system 1 is in normal operation, the filled refrigerant can completely increase the pressure and temperature through the compressor 100 and then enter the condenser 200.
In an embodiment, as shown in fig. 1, the refrigeration system 1 includes refrigeration components such as a first evaporator 310, a second evaporator 320, a compressor 100, a condenser 200, a first throttle 410, a second throttle 420, an electric valve (a valve body 500), a dryer 600, and a stop valve 700. The filling apparatus includes a first filler 810 and a second filler 820. The compressor 100 has a suction pipe, a discharge pipe, and a process pipe 120, wherein the process pipe 120 has a first filling opening 110, and the suction pipe and the process pipe 120 are not connected to each other when the compressor 100 stops operating.
The electric valve is provided with three switchable valve positions and can control the refrigeration circuit to form a passage a, a passage b and a closed circuit c. When the refrigeration equipment is powered on, the electric valve circuit is a passage a or a passage b. When the electric valve is switched to the passage a, the refrigerant mainly passes through the compressor 100, the condenser 200, the first throttling element 410 and the second evaporator 320 in the refrigeration loop and then returns to the compressor 100, and at the moment, the refrigeration compartment corresponding to the second evaporator 320 is refrigerated; when the electric valve is switched to the passage b, the refrigerant mainly passes through the compressor 100, the condenser 200, the second throttling element 420, the first evaporator 310 and the second evaporator 320 in the refrigeration loop and then returns to the compressor 100, and at the moment, the cryogenic compartment corresponding to the first evaporator 310 performs refrigeration; before the refrigeration equipment is powered on for the first time, the electric valve enables the refrigeration loop to be kept in a closed circuit c, and the refrigeration loop is in the two-way non-communicated state.
The stop valve 700 has two valve positions of on-off state and off-off state, and can be manually or automatically adjusted to the off-state when the system fills the refrigerant, and can be manually or automatically adjusted to the on-state when the system normally refrigerates after the refrigerant is filled.
The refrigeration equipment with the refrigeration system 1 or the similar structure can realize the refrigerant filling of double working media, and the refrigeration system 1 comprises two refrigerant filling ports: a first fill port 110 and a second fill port 610. The specific filling method comprises the following steps: firstly, respectively arranging filling joints at a first filling port 110 and a second filling port 610 of a refrigeration system 1, wherein the two joints are respectively connected with a vacuum pump for vacuum pumping; secondly, after the refrigeration system 1 finishes vacuumizing, the two filling joints are respectively connected with the first filling machine 810 and the second filling machine 820 for filling, and because the electric valve and the stop valve 700 are both in a closed state at the moment, one end of the condenser 200 is filled with one refrigerant, and the other end of the evaporator is filled with the other refrigerant. Finally, after the refrigerant is filled, the electric valve is controlled to enable the refrigeration loop to recover the state of the passage a or the passage b, the stop valve 700 is adjusted to be in the passage state, and after the refrigerant is electrified, the two refrigerants are fully mixed to complete the refrigerant filling.
The refrigeration equipment and the refrigerant filling method provided by the embodiment utilize the characteristic that the compressor and the electric valve can block a flow path, realize the evacuation and filling of the mixed working medium, do not need premixing equipment, and have the advantages of small investment and low cost.
Example four
As shown in fig. 1, a second aspect of the present invention provides a refrigerant filling method for a refrigeration system 1 of any of the above embodiments. The refrigerant filling method comprises the following steps: the control valve body 500 is in a closed state, and the shutoff valve 700 of the refrigeration system 1 is in an open state; the first filling port 110 is connected with the first filling machine 810, the second filling port 610 is connected with the second filling machine 820, and filling is controlled; upon completion of charging, the valve body 500 and the cut-off valve 700 are controlled to be opened, and the operation of the compressor 100 is controlled.
According to the refrigerant filling method, the refrigeration circuit is disconnected firstly, the refrigeration system 1 is connected with the two filling machines respectively for filling different refrigerants, the refrigeration circuit is conducted after filling is completed, the compressor 100 is controlled to operate, filling of different refrigerants is achieved under the condition that the refrigeration system 1 is not additionally provided with the premixing equipment, and cost is greatly saved.
Specifically, the first charging port charges one of the first refrigerant and the second refrigerant, and the second charging port charges the other of the first refrigerant and the second refrigerant.
Further, before the first filling port 110 is connected to the first filling machine 810 and the second filling port 610 is connected to the second filling machine 820, the method further includes: the first filling port 110 and the second filling port 610 are respectively connected with a vacuum pump, and the operation of the vacuum pump is controlled to perform vacuum pumping.
In this embodiment, before the filling ports are connected with the filling machine, the two filling ports are respectively connected with the vacuum pump, and then the vacuum pump is controlled to operate for vacuumizing, so that moisture in the refrigeration system 1 is pumped out along with air, and the refrigeration system 1 is prevented from being blocked by ice.
EXAMPLE five
An embodiment of the third aspect of the present invention provides a refrigeration apparatus, comprising the refrigeration system 1 of any of the embodiments of the first aspect. Since the refrigeration apparatus in this embodiment includes the refrigeration system 1 in any of the embodiments of the first aspect described above, there are all the advantages of the refrigeration system 1 described above.
Further, the refrigeration apparatus further includes: the box body is provided with a first chamber and a second chamber; a first evaporator of the refrigeration system is configured to refrigerate the first compartment and a second evaporator is configured to refrigerate the second compartment.
In this technical scheme, be provided with first compartment and second compartment in the box and be used for storing edible material or food, specifically, first evaporimeter is corresponding to refrigerate with first compartment, and the second evaporimeter is used for refrigerating the second compartment, because of the mixed refrigerant that injects into among the refrigerating system, and then can realize satisfying different demands to the refrigeration temperature of first compartment and second compartment, can obtain lower evaporating temperature in the refrigeration process, realize low temperature freezing. Furthermore, the mixed refrigerant at least comprises the first refrigerant and the second refrigerant, so that a plurality of refrigerants are mixed, and a better refrigeration effect is realized.
Furthermore, refrigeration plant includes cryrogenic room, cold-stored room and freezing room, and first evaporimeter is used for refrigerating to cryrogenic room, and the second evaporimeter is used for refrigerating to cold-stored room and freezing room, and then has realized satisfying the user to the demand of different refrigeration temperatures, promotes user experience.
In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, unless otherwise expressly limited, for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in the particular orientation, and thus should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In the present invention, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
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 (10)

1. A refrigeration system, comprising:
the compressor, the compressor is provided with gas vent, return-air inlet and first notes mouth of filling, fill in the compressor and fill mixed refrigerant, mixed refrigerant includes at least: a first refrigerant and a second refrigerant;
one end of the condenser is communicated with the exhaust port;
one end of the first evaporator is communicated with the other end of the condenser;
one end of the second evaporator is communicated with the other end of the first evaporator, and the other end of the second evaporator is communicated with the air return port;
the two ends of the first throttling element are respectively communicated with the other end of the condenser and one end of the second evaporator;
the inlet of the valve body is communicated with the other end of the condenser, the first outlet of the valve body is communicated with one end of the first evaporator, and the second outlet of the valve body is communicated with the first throttling element;
the two ends of the dryer are respectively communicated with the condenser and the inlet of the valve body, and the dryer is provided with a second filling port;
wherein the valve body is configured to be adapted to switch a flow direction of the mixed refrigerant.
2. The refrigerant system as set forth in claim 1, further including:
the two ends of the second throttling piece are respectively communicated with the first outlet of the valve body and one end of the first evaporator;
the valve body is an electric valve.
3. The refrigerant system as set forth in claim 1, further including:
and the two ends of the stop valve are respectively connected with the exhaust port of the compressor and one end of the condenser.
4. The refrigerant system as set forth in claim 1, further including:
the first filling port and the second filling port are both provided with the filling connectors.
5. The refrigeration system according to any one of claims 1 to 4,
based on the compressor being in a stop state, the return air port and the charging port are not communicated with the exhaust port.
6. The refrigeration system according to any one of claims 1 to 4,
the first refrigerant is an ethane refrigerant, and the second refrigerant is an isobutane refrigerant; or
The first refrigerant is a propane refrigerant, and the second refrigerant is an isobutane refrigerant.
7. A refrigerant charging method for a refrigeration system according to any one of claims 1 to 6, wherein the refrigerant charging method includes:
controlling the valve body to be in a closed state and a stop valve of the refrigeration system to be in a circuit breaking state;
connecting a first filling machine based on the first filling port, connecting a second filling machine based on the second filling port, and controlling to fill;
and controlling the valve body and the stop valve to be communicated and controlling the compressor to operate based on the condition of finishing charging.
8. The refrigerant charging method as claimed in claim 7, wherein before the first filling port is connected to a first filling machine and the second filling port is connected to a second filling machine, the method further comprises:
and the first filling port and the second filling port are respectively connected with a vacuum pump, so that the vacuum pump is controlled to operate and vacuumize.
9. A refrigeration apparatus, comprising: a refrigeration system according to any one of claims 1 to 6.
10. The refrigeration appliance according to claim 9, further comprising:
the box body is provided with a first chamber and a second chamber;
the first evaporator of the refrigeration system is configured and adapted to refrigerate the first compartment and the second evaporator is configured and adapted to refrigerate the second compartment.
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CN106766526A (en) * 2016-12-26 2017-05-31 青岛海尔股份有限公司 Connection in series-parallel Dual-evaporator refrigeration system, the refrigerator with the system and control method
US20170314830A1 (en) * 2016-04-27 2017-11-02 Rolls-Royce Corporation Supercritical transient storage of refrigerant
CN109883077A (en) * 2019-03-20 2019-06-14 合肥华凌股份有限公司 Refrigeration system and refrigeration equipment
CN209512965U (en) * 2019-01-31 2019-10-18 鞍山新磁电子有限公司 A kind of air conditioning for automobiles refrigerant caliberating device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103335439A (en) * 2013-07-18 2013-10-02 合肥美的电冰箱有限公司 Refrigeration system
US20170314830A1 (en) * 2016-04-27 2017-11-02 Rolls-Royce Corporation Supercritical transient storage of refrigerant
CN106766526A (en) * 2016-12-26 2017-05-31 青岛海尔股份有限公司 Connection in series-parallel Dual-evaporator refrigeration system, the refrigerator with the system and control method
CN209512965U (en) * 2019-01-31 2019-10-18 鞍山新磁电子有限公司 A kind of air conditioning for automobiles refrigerant caliberating device
CN109883077A (en) * 2019-03-20 2019-06-14 合肥华凌股份有限公司 Refrigeration system and refrigeration equipment

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