CN113324286A - Refrigerating system and control method thereof - Google Patents

Refrigerating system and control method thereof Download PDF

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Publication number
CN113324286A
CN113324286A CN202110753133.6A CN202110753133A CN113324286A CN 113324286 A CN113324286 A CN 113324286A CN 202110753133 A CN202110753133 A CN 202110753133A CN 113324286 A CN113324286 A CN 113324286A
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China
Prior art keywords
water
communicated
valve
unit
output end
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CN202110753133.6A
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Chinese (zh)
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CN113324286B (en
Inventor
吕东建
周挺
廖宜利
谢文科
李琪铎
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Guangdong Haiwu Technology Co Ltd
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Guangdong Haiwu Technology Co Ltd
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Priority to CN202110753133.6A priority Critical patent/CN113324286B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/14—Heat exchangers specially adapted for separate outdoor units
    • F24F1/16—Arrangement or mounting thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • 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
    • F25B2500/29—High ambient temperatures
    • 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

Abstract

The invention discloses a refrigeration system and a control method thereof, wherein outdoor air is dehumidified by a dehumidification unit, and internal moisture of the outdoor air is condensed and separated out in the dehumidification process; the outdoor air is contacted with water in the spraying device for heat exchange, the outdoor air is further cooled, and the outdoor air can help the outdoor unit to exchange heat, so that refrigeration in a high-humidity environment is realized; in the process, the water containing part can receive water flowing down from the spraying device and the dehumidification unit, and the water is circulated to the spraying device through the water pump assembly, the water is reduced in temperature due to evaporation and heat absorption of the water when the water is in contact with outdoor air in the spraying device, if the water temperature is too high, the water is continuously circulated in the spraying device, the water containing part and the water pump assembly under the action of the valve device, and is continuously in contact with the outdoor air for heat exchange to reduce the water temperature in the water containing part, so that refrigeration of the outdoor unit in a high-temperature environment is realized; namely, the refrigerating system has the characteristics of energy conservation and environmental protection and has the refrigerating capacity in a high-temperature and high-humidity environment.

Description

Refrigerating system and control method thereof
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to a refrigeration system and a control method thereof.
Background
At present, with the popularization of energy-saving and environment-friendly concepts, people are pursuing refrigeration equipment with energy saving or low power consumption. Among them, the compressor in the refrigeration apparatus is the most power consuming component, and it is considered to replace the compressor with another component.
The refrigeration equipment in the prior art is environment-friendly, and how to fully utilize an outdoor cold source is considered, so that on the basis of the existing compressor circulation, a fluorine pump circulation utilizing the outdoor cold source and a circulation utilizing the evaporative cooling of water to pre-cool the outdoor cold source are added, namely when the outdoor environment temperature is low, the refrigeration equipment is switched to the fluorine pump circulation, a refrigerant subjected to heat exchange by an evaporator is directly conveyed to a condenser in an outdoor unit to exchange heat with the outdoor cold source, and the cooled refrigerant returns to the evaporator through the fluorine pump.
The refrigeration equipment can not be applied to high-temperature and high-humidity environments, wherein one of the reasons is that the heat exchange efficiency of the refrigerant and an outdoor cold source is low under the high-temperature environment, and the other reason is that the evaporation cooling efficiency of water is low under the high-humidity environment, so that the outdoor cold source can not be effectively cooled. Therefore, there is a need to develop a refrigeration system that can operate in high temperature and high humidity environment and is energy-saving and environment-friendly.
Disclosure of Invention
The invention aims to provide a refrigerating system and a control method thereof, and solves the problems that the conventional refrigerating equipment cannot be compatible with high-temperature high-humidity environment operation and is energy-saving and environment-friendly.
In order to achieve the purpose, the invention adopts the following technical scheme:
a refrigeration system comprises an outdoor unit, wherein a dehumidification unit is arranged in the outdoor unit; in the outdoor unit, a water containing part is arranged on one side of the bottom of the dehumidification unit; a water temperature sensor is arranged in the water containing part, and a water outlet of the water containing part is communicated with a water pump assembly through a pipeline; the water pump assembly is respectively communicated with one end of a first heat exchange unit and one end of a refrigeration water circulation pipeline through a valve device, and the other end of the first heat exchange unit and the other end of the refrigeration water circulation pipeline are both communicated with the same spraying device;
the water temperature sensor is electrically connected with the valve device and used for controlling the water pump assembly to be communicated with the refrigeration water circulation pipeline and controlling the water pump assembly not to be communicated with the first heat exchange unit when the measured water temperature value is larger than a preset water temperature threshold value.
Optionally, a first condenser is arranged on one side of the spraying device far away from the water containing part in the outdoor unit;
the output intercommunication of first condenser has the stock solution device, the output intercommunication of stock solution device has pump body unit, the output intercommunication of pump body unit has second heat transfer unit, the output of second heat transfer unit with the input intercommunication of first condenser.
Optionally, the dehumidification unit is a compressor evaporator, an output end of the compressor evaporator is communicated with a compressor, an output end of the compressor is communicated with a second condenser, and an output end of the second condenser is communicated with an input end of the compressor evaporator;
the second condenser is arranged on one side of the spraying device far away from the water containing part.
Optionally, an electronic expansion valve is further communicated between the output end of the second condenser and the input end of the compressor evaporator.
Optionally, the valve arrangement comprises a first solenoid valve and the second solenoid valve; the first electromagnetic valve is communicated between the output end of the water pump assembly and the input end of the spraying device; the second electromagnetic valve is communicated between the output end of the water pump assembly and the input end of the first heat exchange unit;
or the valve device comprises a three-way valve, the input end of the three-way valve is communicated with the output end of the water pump assembly, the first output end of the three-way valve is communicated with the input end of the spraying device, and the second output end of the three-way valve is communicated with the input end of the first heat exchange unit.
Optionally, the dehumidifying unit is a moisture absorption block for absorbing water.
Optionally, the first heat exchange unit is a plate heat exchanger; a water inlet of the plate heat exchanger is communicated with an output end of the water pump assembly, and a water outlet of the plate heat exchanger is communicated with an input end of the spraying device;
a refrigerant outlet of the plate heat exchanger is communicated with a liquid storage device, an output end of the liquid storage device is communicated with a pump body unit, an output end of the pump body unit is communicated with a second heat exchange unit, and an output end of the second heat exchange unit is communicated with a refrigerant inlet of the plate heat exchanger;
the output end of the first condenser is communicated with an electronic expansion valve, the output end of the electronic expansion valve is communicated with a third heat exchange unit, the output end of the third heat exchange unit is communicated with a compressor, and the output end of the compressor is communicated with the input end of the first condenser.
Optionally, the system further comprises an indoor temperature sensor arranged indoors;
a third electromagnetic valve is communicated between the output end of the first condenser and the input end of the electronic expansion valve;
a fourth electromagnetic valve is arranged between the refrigerant outlet of the plate heat exchanger and the input end of the third electromagnetic valve;
a fifth electromagnetic valve is arranged between the output end of the pump body unit and the input end of the electronic expansion valve;
a sixth electromagnetic valve is arranged between the output end of the pump body unit and the input end of the second heat exchange unit;
the indoor temperature sensor is electrically connected with the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve and the sixth electromagnetic valve respectively;
the compressor is connected with a first one-way valve in parallel, and a third one-way valve is arranged between the plate heat exchanger and the liquid storage device.
A control method of a refrigeration system, which is applied to the refrigeration system as described above, the control method comprising:
acquiring a water temperature value of the water containing part;
judging whether the water temperature value is greater than a preset water temperature threshold value or not;
if so, controlling the valve device to communicate the water pump assembly with the refrigeration water circulation pipeline and not communicate the water pump assembly with the first heat exchange unit;
if not, the valve device is controlled, the water pump assembly is not communicated with the refrigeration water circulation pipeline, and the water pump assembly is communicated with the first heat exchange unit.
Optionally, the control method is applied to the refrigeration system as described above, and comprises the following steps:
starting the pump body unit, controlling the third electromagnetic valve to be closed, controlling the fourth electromagnetic valve to be opened, controlling the fifth electromagnetic valve to be opened, and controlling the sixth electromagnetic valve to be closed;
acquiring an indoor temperature value;
judging whether the indoor temperature value is smaller than a preset indoor temperature threshold value or not;
if so, maintaining the states of the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve and the sixth electromagnetic valve;
if not, the compressor is started, the third electromagnetic valve is controlled to be opened, and the states of the fourth electromagnetic valve, the fifth electromagnetic valve and the sixth electromagnetic valve are maintained.
Compared with the prior art, the invention has the following beneficial effects:
according to the refrigeration system and the control method thereof, firstly, the dehumidification unit is used for dehumidifying the outdoor air, wherein the moisture in the outdoor air is condensed and separated out in the dehumidification process, and the temperature and the humidity are reduced; then, the outdoor air is contacted with water sprayed out of the spraying device for heat exchange, the outdoor air is further cooled due to the evaporation effect of the water, and the outdoor air subjected to double cooling can help the outdoor unit to refrigerate in a high-humidity environment; in the process, the water containing part can receive water flowing down from the spraying device and the dehumidification unit, and the water is circulated to the spraying device through the water pump assembly, the water is reduced in temperature due to evaporation and heat absorption of the water when the water is in contact with outdoor air in the spraying device, if the water temperature is too high, the water is continuously circulated in the spraying device, the water containing part and the water pump assembly under the action of the valve device, and is continuously in contact with the outdoor air for heat exchange to reduce the water temperature in the water containing part, so that refrigeration of the outdoor unit in a high-temperature environment is realized; namely, the refrigerating system has the characteristics of energy conservation and environmental protection and has the refrigerating capacity in a high-temperature and high-humidity environment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
The structure, proportion, size and the like shown in the drawings are only used for matching with the content disclosed in the specification, so that the person skilled in the art can understand and read the description, and the description is not used for limiting the limit condition of the implementation of the invention, so the method has no technical essence, and any structural modification, proportion relation change or size adjustment still falls within the scope of the technical content disclosed by the invention without affecting the effect and the achievable purpose of the invention.
Fig. 1 is a schematic overall structure diagram of a refrigeration system according to a first embodiment of the present invention;
fig. 2 is a schematic view of the overall structure of a refrigeration system according to a second embodiment of the present invention;
fig. 3 is a schematic flow chart illustrating a control method of a refrigeration system according to a third embodiment of the present invention;
fig. 4 is a schematic flow chart illustrating a control method of a refrigeration system according to a fourth embodiment of the present invention;
fig. 5 is a heat exchange schematic diagram of a refrigeration system according to an embodiment of the present invention.
Illustration of the drawings: 101. an outdoor bottom air inlet; 102. an outdoor top air outlet;
21. a dehumidification unit; 22. a compressor; 23. a second condenser; 24. an electronic expansion valve; 25. a third heat exchange unit;
31. a spraying device; 32. a water containing part; 33. a water pump assembly; 34. a first heat exchange unit; 35. a refrigeration water circulation pipe;
41. a first condenser; 42. a liquid storage device; 43. a pump body unit; 44. a second heat exchange unit;
51. a first solenoid valve; 52. a second solenoid valve; 53. a third electromagnetic valve; 54. a fourth solenoid valve; 55. a fifth solenoid valve; 56. a sixth electromagnetic valve;
61. a first check valve; 62. a second one-way valve; 63. a third check valve; 64. and a fourth check valve.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. It should be noted that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1 to 5, fig. 1 is a schematic view of an overall structure of a refrigeration system according to a first embodiment of the present invention, fig. 2 is a schematic view of an overall structure of a refrigeration system according to a second embodiment of the present invention, fig. 3 is a schematic view of a flow chart of a control method of a refrigeration system according to a third embodiment of the present invention, fig. 4 is a schematic view of a flow chart of a control method of a refrigeration system according to a fourth embodiment of the present invention, and fig. 5 is a schematic view of a heat exchange principle of a refrigeration system according to a first embodiment of the present invention.
Example one
The refrigerating system provided by the embodiment can be applied to high-temperature and high-humidity areas in the south and the like, can fully utilize an outdoor cold source, effectively improves the energy efficiency, and has high environmental protection performance.
As shown in fig. 1, the refrigeration system of the present embodiment includes an outdoor unit in which a dehumidification unit 21 is installed; in the outdoor unit, a water containing part 32 is arranged at one side of the bottom of the dehumidification unit 21; a water temperature sensor is arranged in the water containing part 32, and a water outlet of the water containing part 32 is communicated with a water pump assembly 33 through a pipeline; the water pump assembly 33 is respectively communicated with one end of the first heat exchange unit 34 and one end of the refrigerating water circulation pipeline 35 through a valve device, and the other end of the first heat exchange unit 34 and the other end of the refrigerating water circulation pipeline 35 are both communicated with the same spraying device 31. Wherein, the spraying device 31 comprises a nozzle for spraying water, and a filler for evaporating liquid such as a wet film is arranged below the nozzle; the components in the left side frame line in fig. 1 are components of an indoor unit, the components in the right side frame line are components of an outdoor unit, and the first heat exchange unit 34 is disposed in the indoor unit.
The water temperature sensor is electrically connected with the valve device and is used for enabling the valve device to control the water pump assembly 33 to be communicated with the refrigerating water circulation pipeline 35 when the measured water temperature value is larger than a preset water temperature threshold value, and controlling the water pump assembly 33 not to be communicated with the first heat exchange unit 34.
For example, referring to fig. 5, the heat exchange process of the refrigeration system is described, firstly, the dehumidification unit 21 dehumidifies the outdoor air, wherein the indoor moisture of the outdoor air is condensed and separated out during the dehumidification process, and the temperature and humidity are reduced (the state of the outdoor air is changed from 1 point to 2 points in fig. 5); then, the outdoor air is contacted with the water sprayed from the spraying device 31 for heat exchange, and due to the evaporation effect of the water, the outdoor air is further cooled (the state of the outdoor air is changed from 2 points to 3 points in fig. 5), and the outdoor air subjected to double cooling can help the outdoor unit to realize refrigeration in a high-humidity environment; in the process, the water containing part 32 receives water flowing down from the spraying device 31 and the dehumidification unit 21, the water is circulated to the spraying device 31 through the water pump assembly 33, the temperature of the water is reduced due to heat absorption caused by water evaporation when the water is contacted with outdoor air in the spraying device 31 (the state of the water is changed from a point B to a point A in fig. 5), if the water temperature is too high, the water is continuously circulated in the spraying device 31, the water containing part 32 and the water pump assembly 33 under the action of the valve device, and the water is continuously contacted with the outdoor air to exchange heat so as to reduce the water temperature in the water containing part 32, so that the refrigeration of the outdoor unit in a high-temperature environment is realized; namely, the refrigerating system has the characteristics of energy conservation and environmental protection and has the refrigerating capacity in a high-temperature and high-humidity environment.
Further, in the outdoor unit, a first condenser 41 is provided on a side of the shower device 31 remote from the water containing unit 32.
The output end of the first condenser 41 is communicated with a liquid storage device 42, the output end of the liquid storage device 42 is communicated with a pump body unit 43, the output end of the pump body unit 43 is communicated with a second heat exchange unit 44, and the output end of the second heat exchange unit 44 is communicated with the input end of the first condenser 41. The pump unit 43 may be a fluorine pump or a refrigerant pump. The load can be judged according to the indoor return air temperature, and when the indoor return air temperature is greater than a preset threshold value, the frequency of the pump unit 43, the water pump assembly 33 and an outdoor fan of the outdoor unit is increased to increase indoor cooling.
Further, the dehumidification unit 21 is a compressor evaporator, an output end of the compressor evaporator is communicated with the compressor 22, an output end of the compressor 22 is communicated with the second condenser 23, an output end of the second condenser 23 is communicated with an input end of the compressor evaporator, and the second condenser 23 is arranged on one side of the spraying device 31 far away from the water containing portion 32.
The air dehumidification system composed of the compressor 22, the second condenser 23 and the compressor evaporator can make the saturation temperature corresponding to the evaporation pressure of the refrigerant in the compressor evaporator lower than the dew point temperature of the outdoor air (but higher than 0 ℃), that is, the temperature of the refrigerant in the compressor evaporator before heat exchange is lower than the dew point value in fig. 5, and then dehumidifies the outdoor air, so as to achieve the effect of reducing the humidity and the wet bulb temperature of the outdoor air.
Further, an electronic expansion valve 24 is communicated between the output end of the second condenser 23 and the input end of the compressor evaporator. For example, when the outdoor air temperature is high and the humidity is high, the frequency of the compressor 22 and the opening degree of the electronic expansion valve 24 are adjusted to maintain the saturation temperature corresponding to the evaporation pressure of the refrigerant in the compressor evaporator below the air dew point temperature (for example, the saturation temperature corresponding to the evaporation pressure is adjusted to be 3-5 ℃, but cannot be lower than 0 ℃, so as to prevent the evaporator from freezing), wherein the compressor refrigeration cycle is adopted as the dehumidification system, so that the energy efficiency is higher.
In a particular embodiment, the valve means comprise a first solenoid valve 51 and a second solenoid valve 52.
The first electromagnetic valve 51 is communicated between the output end of the water pump assembly 33 and the input end of the spraying device 31; the second electromagnetic valve 52 is communicated between the output end of the water pump assembly 33 and the input end of the first heat exchange unit 34.
In another specific embodiment, the valve device may be a three-way valve, which can communicate the water pump assembly 33 with the spraying device 31 and/or can communicate the first heat exchange unit 34 with the spraying device 31. Specifically, the first output of three-way valve and spray set 31's input intercommunication, the second output of three-way valve and first heat exchange unit 34's input intercommunication, when the water tray temperature was too high, the input and the first output intercommunication of three-way valve, the input and the second output of three-way valve do not communicate, realize the cooling to water through the circulation.
In this embodiment, the first heat exchange unit 34 is a surface air cooler and the second heat exchange unit 44 is a refrigerant pump evaporator.
The refrigeration system in this embodiment can handle a variety of situations, exemplary:
a. when the temperature is high and the humidity is high, the compressor 22, the water pump assembly 33 and the pump body unit 43 operate simultaneously, and the compressor 22, the compressor evaporator, the electronic expansion valve 24 and the second condenser 23 can ensure that the saturation temperature corresponding to the evaporation pressure of the refrigerant in the compressor evaporator is maintained below the dew point temperature of air, so that the dehumidification effect is ensured; the surface air cooler, the liquid storage device 42, the pump body unit 43, the refrigerant pump evaporator and the first condenser 41 can ensure the refrigerating effect of the refrigerating system.
b. When the outdoor temperature is high and the humidity is low, the water pump assembly 33 and the pump unit 43 are operated at the same time, and the compressor 22 is not operated; when the indoor return air temperature is higher than the preset temperature threshold, the compressor 22 is started to perform dehumidification cooling or equal-humidity cooling on the outdoor air, so that cold water and cold air with lower temperature are prepared, and the requirement of indoor cold quantity is met.
c. When the outdoor temperature is low and the humidity is high, or when the outdoor air and the humidity are both low, the pump body unit 43 is firstly operated, and the compressor 22 and the water pump assembly 33 are not operated; when the indoor return air temperature is higher than the preset temperature threshold value, the compressor 22 and the water pump assembly 33 are started to dehumidify the outdoor air, and then the outdoor air and the water in the spraying device 31 are subjected to evaporative cooling to prepare cold water and cold air at lower temperature, so that the requirement of indoor cold quantity is met.
In conclusion, the refrigeration system of the embodiment has the advantages of fully utilizing outdoor cold sources, being high in energy efficiency, large in refrigerating capacity, compatible with high-temperature and high-humidity environments, saving water resources and the like.
Example two
More specifically, as shown in fig. 2, the refrigeration system of the present embodiment includes an outdoor unit, the outdoor unit is provided with an outdoor bottom air inlet 101 and an outdoor top air outlet 102, and an air flow channel is formed between the outdoor bottom air inlet 101 and the outdoor top air outlet 102; a dehumidifying unit 21 (not shown in fig. 2), a shower device 31, and a first condenser 41 are sequentially provided in the air flow passage. The spraying device 31 includes a nozzle for spraying water, and a filler for evaporating liquid such as a wet film is provided below the nozzle.
The first condenser 41 is arranged on one side of the spraying device 31 far away from the water containing part 32; the output end of the first condenser 41 is communicated with a liquid storage device 42, the output end of the liquid storage device 42 is communicated with a pump body unit 43, the output end of the pump body unit 43 is communicated with a second heat exchange unit 44, and the output end of the second heat exchange unit 44 is communicated with the input end of the first condenser 41.
The outdoor unit is also provided with a water containing part 32, and the water containing part 32 is arranged on one side of the outdoor bottom air inlet 101 far away from the outdoor top air outlet 102; the water inlet end of the water containing unit 32 is used for receiving water flowing down from the dehumidification unit 21 and the shower device 31, and the water outlet end of the water containing unit 32 is communicated with a water pump assembly 33.
The output end of the water pump assembly 33 is communicated with a valve device, the water pump assembly 33 is respectively communicated with the first heat exchange unit 34 and the refrigerating water circulating pipeline 35 through the valve device, and the input end of the spraying device 31 is respectively communicated with the output end of the first heat exchange unit 34 and the output end of the refrigerating water circulating pipeline 35.
A water temperature sensor is arranged in the water containing part 32 and is electrically connected with the valve device; when the water temperature value measured by the water temperature sensor is greater than the preset water temperature threshold value, the output end of the valve device control water pump assembly 33 is communicated with the refrigeration water circulation pipeline 35, and the output end of the control water pump assembly 33 is not communicated with the first heat exchange unit 34.
For example, referring to fig. 5, the heat exchange process of the refrigeration system is described, firstly, the dehumidification unit 21 dehumidifies the outdoor air, wherein the indoor moisture of the outdoor air is condensed and separated out during the dehumidification process, and the temperature and humidity are reduced (the state of the outdoor air is changed from 1 point to 2 points in fig. 5); then, the outdoor air is contacted with the water sprayed from the spraying device 31 for heat exchange, and due to the evaporation effect of the water, the outdoor air is further cooled (the state of the outdoor air is changed from 2 points to 3 points in fig. 5), and the outdoor air subjected to double cooling exchanges heat with the first condenser 41, so that the refrigeration of the outdoor unit under the high-humidity environment is realized; in the process, the water containing part 32 receives water flowing down from the spraying device 31 and the dehumidification unit 21, the water is circulated to the spraying device 31 through the water pump assembly 33, the temperature of the water is reduced due to heat absorption caused by water evaporation when the water is contacted with outdoor air in the spraying device 31 (the state of the water is changed from a point B to a point A in fig. 5), if the water temperature is too high, the water is continuously circulated in the spraying device 31, the water containing part 32 and the water pump assembly 33 under the action of the valve device, and the water is continuously contacted with the outdoor air to exchange heat so as to reduce the water temperature in the water containing part 32, so that the refrigeration of the outdoor unit in a high-temperature environment is realized; namely, the refrigerating system has the characteristics of energy conservation and environmental protection and has the refrigerating capacity in a high-temperature and high-humidity environment.
In one embodiment, the dehumidifying unit 21 is a moisture absorption block for absorbing water. The moisture absorption block includes, but is not limited to, an activated carbon block, a porous silicon block, and the like.
Further, the first heat exchange unit 34 is a plate heat exchanger; the water inlet of the plate heat exchanger is communicated with the output end of the water pump assembly 33, and the water outlet of the plate heat exchanger is communicated with the input end of the spraying device 31.
The refrigerant outlet of the plate heat exchanger is communicated with a liquid storage device 42, the output end of the liquid storage device 42 is communicated with a pump body unit 43, the output end of the pump body unit 43 is communicated with a second heat exchange unit 44, and the output end of the second heat exchange unit 44 is communicated with the refrigerant inlet of the plate heat exchanger.
The output end of the first condenser 41 is communicated with the electronic expansion valve 24, the output end of the electronic expansion valve 24 is communicated with the third heat exchange unit 25, the output end of the third heat exchange unit 25 is communicated with the compressor 22, and the output end of the compressor 22 is communicated with the input end of the first condenser 41. Wherein the third heat exchange unit 25 is a compressor evaporator.
Further, the indoor temperature sensor is arranged indoors.
A third solenoid valve 53 is communicated between the output end of the first condenser 41 and the input end of the electronic expansion valve 24.
A fourth solenoid valve 54 is arranged between the refrigerant outlet of the plate heat exchanger and the input end of the third solenoid valve 53.
A fifth electromagnetic valve 55 is provided between the output end of the pump body unit 43 and the input end of the electronic expansion valve 24. The pump body unit 43 is also connected in parallel with a fourth check valve 64.
A sixth electromagnetic valve 56 is arranged between the output end of the pump body unit 43 and the input end of the second heat exchange unit 44.
The indoor temperature sensor is electrically connected to the third solenoid valve 53, the fourth solenoid valve 54, the fifth solenoid valve 55, and the sixth solenoid valve 56, respectively.
The compressor 22 is connected in parallel with a first check valve 61, and a third check valve 63 is arranged between the plate heat exchanger and the liquid storage device 42.
The refrigeration system provided by the embodiment can greatly prolong the operation time of the pump unit 43, and the refrigeration system at least comprises circulation modes such as a mechanical mode refrigeration cycle, a heat pipe wet mode refrigeration cycle, a heat pipe dry mode refrigeration cycle and the like.
Wherein, the path of the mechanical mode refrigeration cycle is as follows: a compressor 22, a second check valve 62, a first condenser 41, a third electromagnetic valve 53, an electronic expansion valve 24, and a third heat exchange unit 25 (which is a compressor evaporator);
the path of the heat pipe wet mode refrigeration cycle is as follows: the pump body unit 43, the sixth electromagnetic valve 56, the second heat exchange unit 44 (which is a fluorine pump evaporator), the first heat exchange unit 34 (which is a plate heat exchanger), the third check valve 63 and the liquid storage device 42; it should be noted that the mechanical mode refrigeration cycle and the heat pipe wet mode refrigeration cycle can be circulated simultaneously;
the path of the heat pipe dry mode refrigeration cycle is as follows: the pump body unit 43, a fifth electromagnetic valve 55, the electronic expansion valve 24, the third heat exchange unit 25, a first check valve 61, the first condenser 41, the fourth electromagnetic valve 54 and the liquid storage device 42.
When the refrigerating capacity of the heat pipe dry mode refrigerating cycle is insufficient, the mechanical mode refrigerating cycle can be started to perform auxiliary cold supplement, namely the heat pipe dry mode refrigerating cycle and the mechanical mode refrigerating cycle can exist at the same time; similarly, when the refrigerating capacity of the heat pipe wet mode refrigerating cycle is insufficient, the mechanical mode refrigerating cycle can be started to perform auxiliary cold compensation, namely, the heat pipe wet mode refrigerating cycle and the mechanical mode refrigerating cycle can exist at the same time.
In summary, the refrigeration system provided by the embodiment includes the following effects: 1. the first heat exchange unit 34 (water cooling type) and the first condenser 41 (air cooling type) are integrated in the outdoor unit, so that the occupied area is small, and the heat dissipation is more reliable; 2. the dew point temperature is used for cooling, so that the environmental temperature of the starting operation of the pump body unit 43 can be higher, the requirement on humidity is lower, a natural cold source can be used in all weather, and the energy-saving effect is better; 3. the air cooling and water cooling modes can be provided simultaneously, and the outdoor unit can provide double cold sources; 4. by expanding the operation mode of the refrigeration system (at least comprising a mechanical mode refrigeration cycle, b mechanical mode refrigeration cycle and heat pipe wet mode refrigeration cycle, c heat pipe wet mode refrigeration cycle, d heat pipe dry mode refrigeration cycle, e heat pipe dry mode refrigeration cycle and mechanical mode refrigeration cycle species mode), the natural cold source is utilized to the maximum extent, and the operation energy efficiency is improved.
EXAMPLE III
The control method of the refrigeration system provided in this embodiment is applied to the refrigeration systems of embodiments 1 and 2, and as shown in fig. 3, the control method includes:
s101, acquiring a water temperature value of the water containing part 32;
s102, judging whether the water temperature value is larger than a preset water temperature threshold value or not;
if yes, S103, controlling a valve device to enable the water pump assembly 33 to be communicated with the refrigerating water circulating pipe 35, and enabling the water pump assembly 33 not to be communicated with the first heat exchange unit 34;
if not, S104, controlling the valve device to make the water pump assembly 33 not communicated with the refrigeration water circulation pipeline 35 and to make the water pump assembly 33 communicated with the first heat exchange unit 34.
Specifically, when the water temperature in the water containing segment 32 is too high, the first electromagnetic valve 51 is communicated, and the second electromagnetic valve 52 is not communicated, so that the water is continuously subjected to evaporative cooling in the spraying device 31, and is continuously cooled until the water temperature in the water containing segment 32 is cooled to a target temperature, and the refrigeration system can be applied to a high-temperature and high-humidity environment.
Example four
The control method of this embodiment is applied to the refrigeration system of the second embodiment, and as shown in fig. 4, the control method includes:
s201, starting a pump body unit, controlling a third electromagnetic valve to be closed, controlling a fourth electromagnetic valve to be opened, controlling a fifth electromagnetic valve to be opened, and controlling a sixth electromagnetic valve to be closed;
s202, acquiring an indoor temperature value;
s203, judging whether the indoor temperature value is smaller than a preset indoor temperature threshold value;
if yes, S204, maintaining the states of the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve and the sixth electromagnetic valve;
if not, S205, starting the compressor, controlling the third electromagnetic valve to be opened, and maintaining the states of the fourth electromagnetic valve, the fifth electromagnetic valve and the sixth electromagnetic valve.
The two modes of the heat pipe dry mode refrigeration cycle and the mechanical mode refrigeration cycle are switched, and it is to be understood that various starting conditions can be set to match the refrigeration system to have various modes; exemplary, 1, mechanical mode refrigeration cycle; 2. mechanical mode refrigeration cycle + heat pipe wet mode refrigeration cycle (started when the moisture is sufficient and the outdoor cold source is insufficient); 3. a heat pipe wet mode refrigeration cycle (started when the moisture is sufficient and the outdoor cold source is sufficient); 4. a heat pipe dry mode refrigeration cycle (started when water is short and an outdoor cold source is sufficient); 5. a heat pipe dry mode refrigeration cycle and a mechanical mode refrigeration cycle (started when water is deficient and an outdoor cold source is insufficient); the pump body unit 43 is utilized in the second mode to the fourth mode, so that the running time of the pump body unit 43 is greatly improved, the refrigerating efficiency of the refrigerating system is improved, and the environmental protection performance of the refrigerating system is improved.
In summary, the control method of the refrigeration system provided in this embodiment has the advantages of long operation time of the pump unit 43, full utilization of outdoor cold source, high energy efficiency, large refrigerating capacity, compatibility with high-temperature and high-humidity environment, water resource saving, strong environmental protection performance, and the like.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A refrigeration system, comprising an outdoor unit, in which a dehumidifying unit (21) is installed; a water containing part (32) is arranged on one side of the bottom of the dehumidification unit (21) in the outdoor unit; a water temperature sensor is arranged in the water containing part (32), and a water outlet of the water containing part (32) is communicated with a water pump assembly (33) through a pipeline; the water pump assembly (33) is respectively communicated with one end of a first heat exchange unit (34) and one end of a refrigerating water circulating pipeline (35) through a valve device, and the other end of the first heat exchange unit (34) and the other end of the refrigerating water circulating pipeline (35) are both communicated with the same spraying device (31);
the water temperature sensor is electrically connected with the valve device and used for controlling the water pump assembly (33) to be communicated with the refrigeration water circulating pipeline (35) and controlling the water pump assembly (33) not to be communicated with the first heat exchange unit (34) by the valve device when the measured water temperature value is larger than a preset water temperature threshold value.
2. The refrigerating system as claimed in claim 1, wherein a first condenser (41) is provided in the outdoor unit on a side of the shower unit (31) remote from the water containing portion (32);
the output intercommunication of first condenser (41) has stock solution device (42), the output intercommunication of stock solution device (42) has pump body unit (43), the output intercommunication of pump body unit (43) has second heat transfer unit (44), the output of second heat transfer unit (44) with the input intercommunication of first condenser (41).
3. The refrigeration system according to claim 2, wherein the dehumidification unit (21) is a compressor evaporator, an output end of the compressor evaporator is communicated with a compressor (22), an output end of the compressor (22) is communicated with a second condenser (23), and an output end of the second condenser (23) is communicated with an input end of the compressor evaporator;
the second condenser (23) is arranged on one side of the spraying device (31) far away from the water containing part (32).
4. A refrigeration system according to claim 3, characterized in that an electronic expansion valve (24) is also connected between the output of the second condenser (23) and the input of the compressor evaporator.
5. A refrigeration system according to claim 2, characterized in that said valve means comprise a first solenoid valve (51) and said second solenoid valve (52); the first electromagnetic valve (51) is communicated between the output end of the water pump assembly (33) and the input end of the spraying device (31); the second electromagnetic valve (52) is communicated between the output end of the water pump assembly (33) and the input end of the first heat exchange unit (34);
or the valve device comprises a three-way valve, the input end of the three-way valve is communicated with the output end of the water pump assembly (33), the first output end of the three-way valve is communicated with the input end of the spraying device (31), and the second output end of the three-way valve is communicated with the input end of the first heat exchange unit (34).
6. A refrigeration system according to claim 2, wherein the dehumidification unit (21) is a moisture absorption block for absorbing water.
7. A refrigeration system according to claim 6, wherein the first heat exchange unit (34) is a plate heat exchanger; a water inlet of the plate heat exchanger is communicated with an output end of the water pump assembly (33), and a water outlet of the plate heat exchanger is communicated with an input end of the spraying device (31);
a refrigerant outlet of the plate heat exchanger is communicated with a liquid storage device (42), an output end of the liquid storage device (42) is communicated with a pump body unit (43), an output end of the pump body unit (43) is communicated with a second heat exchange unit (44), and an output end of the second heat exchange unit (44) is communicated with a refrigerant inlet of the plate heat exchanger;
the output end of the first condenser (41) is communicated with an electronic expansion valve (24), the output end of the electronic expansion valve (24) is communicated with a third heat exchange unit (25), the output end of the third heat exchange unit (25) is communicated with a compressor (22), and the output end of the compressor (22) is communicated with the input end of the first condenser (41).
8. The refrigerant system as set forth in claim 7, further including an indoor temperature sensor disposed in the room;
a third electromagnetic valve (53) is communicated between the output end of the first condenser (41) and the input end of the electronic expansion valve (24);
a fourth electromagnetic valve (54) is arranged between the refrigerant outlet of the plate heat exchanger and the input end of the third electromagnetic valve (53);
a fifth electromagnetic valve (55) is arranged between the output end of the pump body unit (43) and the input end of the electronic expansion valve (24);
a sixth electromagnetic valve (56) is arranged between the output end of the pump body unit (43) and the input end of the second heat exchange unit (44);
the indoor temperature sensor is electrically connected with the third solenoid valve (53), the fourth solenoid valve (54), the fifth solenoid valve (55) and the sixth solenoid valve (56) respectively;
the compressor (22) is connected with a first one-way valve (61) in parallel, and a third one-way valve (63) is arranged between the plate heat exchanger and the liquid storage device (42).
9. A control method for a refrigeration system, which is applied to the refrigeration system according to claim 1, the control method comprising:
acquiring a water temperature value of the water containing part;
judging whether the water temperature value is greater than a preset water temperature threshold value or not;
if so, controlling the valve device to communicate the water pump assembly with the refrigeration water circulation pipeline and not communicate the water pump assembly with the first heat exchange unit;
if not, the valve device is controlled, the water pump assembly is not communicated with the refrigeration water circulation pipeline, and the water pump assembly is communicated with the first heat exchange unit.
10. The control method of a refrigeration system according to claim 9, applied to the refrigeration system according to claim 8, the control method comprising:
starting the pump body unit, controlling the third electromagnetic valve to be closed, controlling the fourth electromagnetic valve to be opened, controlling the fifth electromagnetic valve to be opened, and controlling the sixth electromagnetic valve to be closed;
acquiring an indoor temperature value;
judging whether the indoor temperature value is smaller than a preset indoor temperature threshold value or not;
if so, maintaining the states of the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve and the sixth electromagnetic valve;
if not, the compressor is started, the third electromagnetic valve is controlled to be opened, and the states of the fourth electromagnetic valve, the fifth electromagnetic valve and the sixth electromagnetic valve are maintained.
CN202110753133.6A 2021-07-02 2021-07-02 Refrigerating system and control method thereof Active CN113324286B (en)

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Citations (5)

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Publication number Priority date Publication date Assignee Title
KR101305234B1 (en) * 2013-01-02 2013-09-06 주식회사 성지공조기술 Evaporative condeser with free cooling
CN106247509A (en) * 2016-09-23 2016-12-21 昆山台佳机电有限公司 Integral type handpiece Water Chilling Units
CN111256257A (en) * 2020-02-26 2020-06-09 西安工程大学 Evaporative cooling water chilling unit for dehumidifying solution dehumidifying moisture-permeable film
CN211953105U (en) * 2020-01-17 2020-11-17 河北秦淮数据有限公司 Cooling system
CN112944739A (en) * 2021-04-15 2021-06-11 广东海悟科技有限公司 Double-circulation refrigeration system using dew point temperature for cooling and control method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101305234B1 (en) * 2013-01-02 2013-09-06 주식회사 성지공조기술 Evaporative condeser with free cooling
CN106247509A (en) * 2016-09-23 2016-12-21 昆山台佳机电有限公司 Integral type handpiece Water Chilling Units
CN211953105U (en) * 2020-01-17 2020-11-17 河北秦淮数据有限公司 Cooling system
CN111256257A (en) * 2020-02-26 2020-06-09 西安工程大学 Evaporative cooling water chilling unit for dehumidifying solution dehumidifying moisture-permeable film
CN112944739A (en) * 2021-04-15 2021-06-11 广东海悟科技有限公司 Double-circulation refrigeration system using dew point temperature for cooling and control method thereof

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