CN112413755B - Precooling and dehumidifying device, precooling and dehumidifying method, precooling and dehumidifying system and air conditioning equipment - Google Patents
Precooling and dehumidifying device, precooling and dehumidifying method, precooling and dehumidifying system and air conditioning equipment Download PDFInfo
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- CN112413755B CN112413755B CN202011467457.5A CN202011467457A CN112413755B CN 112413755 B CN112413755 B CN 112413755B CN 202011467457 A CN202011467457 A CN 202011467457A CN 112413755 B CN112413755 B CN 112413755B
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000004378 air conditioning Methods 0.000 title claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 76
- 239000003507 refrigerant Substances 0.000 claims abstract description 54
- 238000007791 dehumidification Methods 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 8
- 238000004590 computer program Methods 0.000 claims description 3
- 238000011897 real-time detection Methods 0.000 claims description 2
- 239000002826 coolant Substances 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 29
- 238000005507 spraying Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 239000000945 filler Substances 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 230000004044 response Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
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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
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0083—Indoor units, e.g. fan coil units with dehumidification means
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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
- 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
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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
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
- F24F2003/144—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by dehumidification only
- F24F2003/1446—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by dehumidification only by condensing
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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
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Drying Of Gases (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a precooling and dehumidifying device, a precooling and dehumidifying method, a precooling and dehumidifying system and air conditioning equipment, wherein the precooling and dehumidifying method comprises the following steps: detecting the wet bulb temperature value at the air inlet of the condenser in real time; controlling the refrigerant flowing into the pre-cooling coil in real time according to the wet bulb temperature value; and precooling and dehumidifying the outdoor air at the air inlet of the condenser through the refrigerant. According to the invention, the problem of poor cooling effect caused by the influence of regional wet bulb temperature of the evaporative condenser in the prior art is solved, and the pre-cooling coil is added at the air inlet end of the condenser, so that the air inlet wet bulb temperature can be effectively reduced, and the heat exchange effect is improved; by adding the bypass electronic expansion valve at the outlet end of the heat exchange tube, the refrigerant flowing into the pre-cooling coil can be better controlled, and the wet bulb temperature can be accurately controlled.
Description
Technical Field
The invention relates to the technical field of units, in particular to a precooling dehumidification device, a precooling dehumidification method, a precooling dehumidification system and air conditioning equipment.
Background
The evaporative condenser is a high-efficiency and green refrigeration technology which uses the temperature difference of dry and wet balls as driving force, and the refrigerant in the heat exchange tube is cooled by indirect evaporative cooling. However, the cooling effect is poor due to the fact that the climate difference of the areas is large, namely the wet bulb temperature difference of each area is large.
Aiming at the problem that the evaporative condenser in the prior art is poor in cooling effect caused by the influence of regional wet bulb temperature, no effective solution is proposed at present.
Disclosure of Invention
The embodiment of the invention provides a precooling and dehumidifying device, a precooling and dehumidifying method, a precooling and dehumidifying system and air conditioning equipment, which are used for solving the problem that an evaporative condenser in the prior art is poor in cooling effect due to the influence of regional wet bulb temperature.
In order to solve the technical problems, the invention provides a precooling dehumidification device, which comprises:
A condenser, an evaporator and a temperature and humidity sensor; the condenser includes: a heat exchange tube; the pre-cooling coil is arranged at the air inlet end of the condenser; the inlet end of the pre-cooling coil is connected with the heat exchange tube, and the outlet end of the pre-cooling coil is connected with the evaporator; the temperature and humidity sensor is positioned at one end of the precooling coil pipe.
Optionally, the inlet end of the pre-cooling coil is connected with the heat exchange tube through a bypass electronic expansion valve.
In another aspect, the present invention provides a pre-cooling and dehumidifying method applied to the pre-cooling and dehumidifying apparatus as described above, the method comprising:
detecting the wet bulb temperature value at the air inlet of the condenser in real time;
Controlling the refrigerant flowing into the pre-cooling coil in real time according to the wet bulb temperature value;
and precooling and dehumidifying the outdoor air at the air inlet of the condenser through the refrigerant.
Optionally, the detecting, in real time, the wet bulb temperature value at the air inlet of the condenser includes:
when the condenser works, the wet bulb temperature value at the air inlet is detected in real time through the temperature and humidity sensor at the air inlet end of the condenser.
Optionally, the controlling the refrigerant flowing into the pre-cooling coil in real time according to the wet bulb temperature value includes:
Judging whether the wet bulb temperature value is equal to a preset wet bulb temperature value or not; if not, the bypass electronic expansion valve is adjusted to control the refrigerant flowing into the pre-cooling coil.
Optionally, if the bypass electronic expansion valve is not equal, the adjusting the bypass electronic expansion valve specifically includes:
When the wet bulb temperature value of the air inlet is smaller than the preset wet bulb temperature value, opening the bypass electronic expansion valve according to the preset opening degree, and keeping the preset opening degree of the bypass electronic expansion valve;
When the wet bulb temperature value of the air inlet is larger than the preset wet bulb temperature value, opening the bypass electronic expansion valve according to the preset opening degree, and increasing the opening degree of the bypass electronic expansion valve.
In another aspect, the present invention further provides a pre-cooling and dehumidifying system, applied to the pre-cooling and dehumidifying apparatus as described above, the system comprising:
The detection module is used for detecting the wet bulb temperature value at the air inlet of the condenser in real time;
the control module is used for controlling the refrigerant flowing into the pre-cooling coil in real time according to the wet bulb temperature value;
And the precooling and dehumidifying module is used for precooling and dehumidifying the outdoor air at the air inlet of the condenser through the refrigerant.
Optionally, the detection module includes:
And the temperature and humidity sensor is positioned at one end of the pre-cooling coil pipe and used for detecting the wet bulb temperature value at the air inlet in real time when the condenser works.
Optionally, the control module includes:
The judging module is used for judging whether the wet bulb temperature value is equal to a preset wet bulb temperature value or not; if not, the bypass electronic expansion valve is adjusted to control the refrigerant flowing into the pre-cooling coil.
Optionally, the judging module includes:
The opening maintaining module is used for opening the bypass electronic expansion valve according to a preset opening when the wet bulb temperature value of the air inlet is smaller than the preset wet bulb temperature value and maintaining the preset opening of the bypass electronic expansion valve;
And the opening increasing module is used for opening the bypass electronic expansion valve according to the preset opening and increasing the opening of the bypass electronic expansion valve when the wet bulb temperature value of the air inlet is larger than the preset wet bulb temperature value.
Further, the invention provides air conditioning equipment comprising the precooling dehumidification system.
The invention also provides a computer readable storage medium having stored thereon a computer program which when executed by a processor implements a method as described above.
The invention has the beneficial effects that: the invention provides a precooling dehumidification method, which comprises the following steps: detecting the wet bulb temperature value at the air inlet of the condenser in real time; controlling the refrigerant flowing into the pre-cooling coil in real time according to the wet bulb temperature value; and precooling and dehumidifying the outdoor air at the air inlet of the condenser through the refrigerant. The problem of the prior art that the evaporative condenser is poor in cooling effect due to the fact that the evaporative condenser is affected by regional wet bulb temperature is solved, and through the fact that the precooling coil is added at the air inlet end of the condenser, the temperature of the air inlet wet bulb can be effectively reduced, and the heat exchange effect is improved; by adding the bypass electronic expansion valve at the outlet end of the heat exchange tube, the refrigerant flowing into the pre-cooling coil can be better controlled, and the wet bulb temperature can be accurately controlled.
Drawings
Fig. 1 is a schematic structural view of a pre-cooling and dehumidifying apparatus according to an embodiment of the present invention;
fig. 2 is a flow chart of a pre-cooling dehumidification method in accordance with an embodiment of the present disclosure;
Fig. 3 is a schematic structural view of a pre-cooling and dehumidifying system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a structure according to an embodiment of the present invention;
fig. 5 is a flow chart according to an embodiment of the present invention.
The system comprises a detection module-201, a control module-202, a pre-cooling dehumidification module-203, a compressor-1, an evaporator-2, a condenser-3, a system electronic expansion valve-4, a bypass electronic expansion valve-5, a pre-cooling coil-6, a water pump-7, a water tank-8, a filler-9, a temperature and humidity sensor-10, a spray device-11, an axial flow fan-12 and a heat exchange tube-13.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, the "plurality" generally includes at least two.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrase "if determined" or "if detected (stated condition or event)" may be interpreted as "when determined" or "in response to determination" or "when detected (stated condition or event)" or "in response to detection (stated condition or event), depending on the context.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or device comprising such elements.
Alternative embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a precooling dehumidification device according to an embodiment of the present invention, as shown in fig. 1, the device includes:
A condenser 3, a compressor 1, an evaporator 2, a system electronic expansion valve 4, a bypass electronic expansion valve 5 and a temperature and humidity sensor 10; the compressor 1, the condenser 3 and the evaporator 2 are connected in a closed and encircling manner; the condenser 3 includes: the device comprises an axial flow fan 12, a water tank 8, a water pump 7, a spraying device 11, a heat exchange tube 13 and a filler 9; the axial flow fan 12 is positioned at the top of the condenser 3; the water tank 8, the water pump 7 and the spraying device 11 are connected in sequence, the heat exchange tube 13 is positioned at the bottom of the spraying device 11, and the filler 9 is positioned at the bottom of the heat exchange tube 13; the heat exchange tube 13 is connected with the evaporator 2 through the system electronic expansion valve 4; the pre-cooling coil 6 is arranged at the air inlet end of the condenser 3; the inlet end of the pre-cooling coil 6 is connected with the heat exchange tube 13, and the outlet end of the pre-cooling coil 6 is connected with the evaporator 2; the temperature and humidity sensor 10 is located at one end of the pre-cooling coil 6.
On the basis of the embodiment, the pre-cooling and dehumidifying device is further optimized, and the inlet end of the pre-cooling coil 6 is connected with the heat exchange tube 13 through the bypass electronic expansion valve 5.
The water tank 8, the water pump 7 and the spraying device 11 are sequentially connected, and are used for enabling water in the water tank 8 to flow to the spraying device 11 through the water pump 7, then uniformly spraying on the heat exchange tube 13 through the spraying device 11, continuously evaporating and absorbing heat, cooling a refrigerant in the heat exchange tube 13, then cooling through the filler 9, finally falling into the water tank 8, and continuing to finish circulation; the refrigerant of the heat exchange tube 13 is transmitted after being compressed at high temperature by the compressor 1, and the cooled refrigerant is transmitted to the evaporator 2 by the heat exchange tube 13 through the system electronic expansion valve 4 or the bypass electronic expansion valve 5; the outdoor air enters the condenser 3 under the action of the axial flow fan 12, exchanges heat with the pre-cooling coil 6 to pre-cool, then contacts with spray water in the condenser 3 and the heat exchange tube 13, continuously exchanges heat, reduces the temperature of the refrigerant in the heat exchange tube 13, and finally is discharged through an air outlet at the top; the electronic expansion valve 4 is connected with the heat exchange tube 13 and the evaporator 2, and is used for receiving the refrigerant in the heat exchange tube 13 and transmitting the refrigerant to the evaporator 2. In particular, the invention is provided with a bypass electronic expansion valve 5, the bypass electronic expansion valve 5 is connected with the inlet end of the pre-cooling coil pipe 6 and the outlet end of the heat exchange pipe 13, and is used for judging whether to adjust the opening of the bypass electronic expansion valve 5 according to the wet bulb temperature value; and receiving the refrigerant in the heat exchange tube 13 and transmitting the refrigerant to the evaporator 2 connected with the outlet end of the pre-cooling coil 6 through the pre-cooling coil 6; further, a temperature and humidity sensor 10 is disposed at one end of the pre-cooling coil 6, and is used for detecting the wet bulb temperature value at the air inlet of the condenser 3 in real time.
Fig. 2 is a flowchart of a pre-cooling and dehumidifying method according to an embodiment of the present invention, as shown in fig. 2, the method includes:
s101, detecting a wet bulb temperature value at an air inlet of a condenser in real time;
S102, controlling the refrigerant flowing into the pre-cooling coil in real time according to the wet bulb temperature value;
s103, precooling and dehumidifying the outdoor air at the air inlet of the condenser through the refrigerant.
In the prior art, the evaporative condenser is a high-efficiency and green refrigeration technology which uses the temperature difference of dry and wet balls as a driving force, and the difference of wet balls (air parameters) is large because of large region difference, and the evaporative condenser is influenced by the wet ball temperature to cause the problem of poor cooling effect, so the invention provides a precooling dehumidification method for controlling the refrigerant flowing into a precooling coil in real time so as to reduce the temperature of the air inlet wet balls; the refrigerant can pre-cool and dehumidify the outdoor air at the air inlet of the condenser.
The wet bulb temperature generally refers to the thermodynamic wet bulb temperature (adiabatic saturation temperature), which refers to the temperature of a system when the system reaches a saturated state and the system reaches thermal equilibrium, because a large amount of water contacts limited wet air under adiabatic conditions and the latent heat required by water evaporation is completely derived from sensible heat emitted by the reduction of the wet air temperature; that is, wet bulb temperature is the lowest temperature that the current environment can reach by evaporating water alone.
For how to detect the wet bulb temperature value at the air inlet of the condenser, the invention provides a specific embodiment, namely, the real-time detection of the wet bulb temperature value at the air inlet of the condenser comprises the following steps: when the condenser works, the wet bulb temperature value at the air inlet is detected in real time through the temperature and humidity sensor at the air inlet end of the condenser.
The temperature and humidity sensor is arranged at the air inlet end of the condenser, and is also arranged at one end of the pre-cooling coil pipe, and can detect the dry bulb temperature value and the wet bulb temperature value, and can read only the wet bulb temperature value in the actual operation process.
For how to control the refrigerant flowing into the pre-cooling coil in real time according to the wet bulb temperature value, the invention provides a specific embodiment, which comprises the following steps: judging whether the wet bulb temperature value is equal to a preset wet bulb temperature value or not; if not, the bypass electronic expansion valve is adjusted to control the refrigerant flowing into the pre-cooling coil.
In the prior art, the circulation of the refrigerant is mainly a compressor-evaporative condenser-system electronic expansion valve-evaporator-compressor, and the bypass electronic expansion valve is correspondingly added due to the addition of a precooling coil pipe, and the circulation process of the corresponding bypass refrigerant is a compressor-evaporative condenser-bypass electronic expansion valve-precooling coil pipe-evaporator-compressor; when the wet bulb temperature value is equal to the preset wet bulb temperature value, the bypass electronic expansion valve is not opened, and the circulation of the refrigerant is controlled only through the system electronic expansion valve; when the wet bulb temperature value is judged to be unequal to the preset wet bulb temperature value, the opening of the bypass electronic expansion valve is adjusted to control the refrigerant flowing into the precooling coil.
Further optimizing on the basis of the above embodiment, if the bypass electronic expansion valve is not equal, adjusting the bypass electronic expansion valve includes: when the wet bulb temperature value of the air inlet is smaller than the preset wet bulb temperature value, opening the bypass electronic expansion valve according to the preset opening degree, and keeping the preset opening degree of the bypass electronic expansion valve; when the wet bulb temperature value of the air inlet is larger than the preset wet bulb temperature value, opening the bypass electronic expansion valve according to the preset opening degree, and increasing the opening degree of the bypass electronic expansion valve.
The bypass electronic expansion valve is closed in the initial state, and a preset wet bulb temperature value S1 is set at the moment and can be set through a manual operator; and detecting a wet bulb temperature value S2 at an air inlet of the condenser in real time through a temperature and humidity sensor, judging whether to open and/or adjust the opening of the bypass electronic expansion valve according to the difference value between the wet bulb temperature value S2 and a preset wet bulb temperature value S1, keeping the bypass electronic expansion valve closed when the difference value is 0, and opening the bypass electronic expansion valve when the difference value is not 0, further, keeping the opening of the electronic expansion valve unchanged when the wet bulb temperature value S2 is smaller than the preset wet bulb temperature value S1, and increasing the opening of the bypass electronic expansion valve by K1 when the wet bulb temperature value S2 is larger than the preset wet bulb temperature value S1 so as to ensure the precooling effect.
The control module judges the data acquired by the temperature and humidity sensor, sends an adjusting instruction to the driving plate, and outputs an electric signal to the bypass electronic expansion valve by the driving plate to drive the bypass electronic expansion valve to act; the bypass electronic expansion valve takes only a few seconds from a fully closed state to a fully opened state, has high reaction and action speed, does not have static superheat degree phenomenon, and can be manually set in opening and closing characteristics and speed.
The present invention also provides a computer readable storage medium having stored thereon a computer program which when executed by a processor implements a method as described above.
Fig. 3 is a schematic structural diagram of a precooling dehumidification system according to an embodiment of the present disclosure, as shown in fig. 3, the system includes:
the control module 202 is used for controlling the refrigerant flowing into the pre-cooling coil in real time according to the wet bulb temperature value;
and the pre-cooling and dehumidifying module 203 is configured to pre-cool and dehumidify the outdoor air at the air inlet of the condenser by using the refrigerant.
In the prior art, the evaporative condenser is a high-efficiency and green refrigeration technology which uses the temperature difference of dry and wet balls as a driving force, and the difference of wet balls (air parameters) is large because of large region difference, and the evaporative condenser is influenced by the wet ball temperature and has poor cooling effect, so that the pre-cooling dehumidification system is provided for controlling the refrigerant flowing into the pre-cooling coil in real time so as to reduce the temperature of the air inlet wet balls; the refrigerant can pre-cool and dehumidify the outdoor air at the air inlet of the condenser.
The wet bulb temperature generally refers to the thermodynamic wet bulb temperature (adiabatic saturation temperature), which refers to the temperature of a system when the system reaches a saturated state and the system reaches thermal equilibrium, because a large amount of water contacts limited wet air under adiabatic conditions and the latent heat required by water evaporation is completely derived from sensible heat emitted by the reduction of the wet air temperature; that is, wet bulb temperature is the lowest temperature that the current environment can reach by evaporating water alone.
For how to detect the wet bulb temperature value at the condenser air intake, the present invention provides a detection module 201, comprising:
And the temperature and humidity sensor is positioned at one end of the pre-cooling coil pipe and used for detecting the wet bulb temperature value at the air inlet in real time when the condenser works.
The temperature and humidity sensor is arranged at the air inlet end of the condenser, and is also arranged at one end of the pre-cooling coil pipe, and can detect the dry bulb temperature value and the wet bulb temperature value, and can read only the wet bulb temperature value in the actual operation process.
In addition, the invention also discloses a specific implementation mode of the control module, namely the control module comprises:
The judging module is used for judging whether the wet bulb temperature value is equal to a preset wet bulb temperature value or not; if not, the bypass electronic expansion valve is adjusted to control the refrigerant flowing into the pre-cooling coil.
In the prior art, the circulation of the refrigerant is mainly a compressor-evaporative condenser-system electronic expansion valve-evaporator-compressor, and the bypass electronic expansion valve is correspondingly added due to the addition of a precooling coil pipe, and the circulation process of the corresponding bypass refrigerant is a compressor-evaporative condenser-bypass electronic expansion valve-precooling coil pipe-evaporator-compressor; when the wet bulb temperature value is equal to the preset wet bulb temperature value, the bypass electronic expansion valve is not opened, and the circulation of the refrigerant is controlled only through the system electronic expansion valve; when the wet bulb temperature value is judged to be unequal to the preset wet bulb temperature value, the opening of the bypass electronic expansion valve is adjusted to control the refrigerant flowing into the precooling coil.
Further preferably, the judging module includes:
The opening maintaining module is used for opening the bypass electronic expansion valve according to a preset opening when the wet bulb temperature value of the air inlet is smaller than the preset wet bulb temperature value and maintaining the preset opening of the bypass electronic expansion valve;
And the opening increasing module is used for opening the bypass electronic expansion valve according to the preset opening and increasing the opening of the bypass electronic expansion valve when the wet bulb temperature value of the air inlet is larger than the preset wet bulb temperature value.
The bypass electronic expansion valve is closed in the initial state, and a preset wet bulb temperature value S1 is set at the moment and can be set through a manual operator; and detecting a wet bulb temperature value S2 at an air inlet of the condenser in real time through a temperature and humidity sensor, judging whether to open and/or adjust the opening of the bypass electronic expansion valve according to the difference value between the wet bulb temperature value S2 and a preset wet bulb temperature value S1, keeping the bypass electronic expansion valve closed when the difference value is 0, and opening the bypass electronic expansion valve when the difference value is not 0, further, keeping the opening of the electronic expansion valve unchanged when the wet bulb temperature value S2 is smaller than the preset wet bulb temperature value S1, and increasing the opening of the bypass electronic expansion valve by K1 when the wet bulb temperature value S2 is larger than the preset wet bulb temperature value S1 so as to ensure the precooling effect.
The control module judges the data acquired by the temperature and humidity sensor, sends an adjusting instruction to the driving plate, and outputs an electric signal to the bypass electronic expansion valve by the driving plate to drive the bypass electronic expansion valve to act; the bypass electronic expansion valve takes only a few seconds from a fully closed state to a fully opened state, has high reaction and action speed, does not have static superheat degree phenomenon, and can be manually set in opening and closing characteristics and speed.
The invention provides air conditioning equipment, which comprises the precooling dehumidification system.
The invention is illustrated by a preferred embodiment below:
As shown in fig. 1, the pre-cooling and dehumidifying apparatus mainly includes: 1-compressor, 2-evaporator, 3-condenser, 4-system electronic expansion valve, 5-bypass electronic expansion valve, 6-precooling coil, 7-water pump, 8-water tank, 9-filler, 10-temperature and humidity sensor, 11-spray device, 12-axial fan etc..
The pre-cooling coil 6 consists of a steel coil, a refrigerant is moved in the pre-cooling coil 6, an inlet of the pre-cooling coil 6 is connected with an outlet end of the bypass electronic expansion valve 5, and an outlet end of the pre-cooling coil 6 is connected with the evaporator 2. The precooling coil 6 is winded outside, and the precooling coil 6 is arranged at the air inlet of the condenser 3.
The temperature and humidity sensor 10 is arranged at the air inlet of the condenser 3.
The circulation process of the waterway system is as follows: the water tank 8-the water pump 7-the spray device 11-the packing 9-the water tank 8. The water in the water tank flows through the spraying device 11 under the action of the water pump 7, is uniformly sprayed on the heat exchange tube 13 through the spraying device 11, continuously evaporates and absorbs heat, cools the refrigerant in the heat exchange tube 13, then cools through the filler 9, finally falls into the water tank 8, and continuously completes circulation.
The circulation process of the air path system is as follows: the air inlet, the precooling coil pipe 6, the condenser 3, the axial flow fan 12 and the air outlet. The outdoor air enters the condenser 3 under the action of the axial flow fan 12 and exchanges heat with the pre-cooling coil 6 to pre-cool; then, the air is contacted with spray water in the condenser 3 and the heat exchange tube 13 to exchange heat continuously, the temperature of the refrigerant in the heat exchange tube 13 is reduced, and finally the air is discharged through an air outlet at the top.
The refrigerant system circulation comprises a main circulation and a bypass circulation. The main circulation process comprises a compressor 1, a condenser 3, a system electronic expansion valve 4, an evaporator 2 and a compressor 1; the bypass circulation process comprises a compressor 1, a condenser 3, a bypass electronic expansion valve 5, a pre-cooling coil 6, an evaporator 2 and a compressor 1.
Fig. 4 is a schematic structural view of an embodiment of the present invention, as shown in fig. 4: the bypass electronic expansion valve 5 is initially closed. The set wet bulb temperature target value is S1, which can be set by a manual operator. The temperature and humidity of the air supply are detected in real time through a temperature and humidity sensor 10 arranged at the air inlet of the condenser 3, and a corresponding wet bulb temperature actual measurement value S2 is fed back. If S2 is less than S1, the opening of the bypass electronic expansion valve 5 is kept unchanged, and S2 is more than S1, the opening of the bypass electronic expansion valve 5 is increased by K1, so that the precooling effect is ensured.
Fig. 5 is a flowchart according to an embodiment of the present invention, and as shown in fig. 5, the flowchart is specifically:
301. Detecting a wet bulb temperature value S2 in real time;
302. Judging that S2 is less than a target value S1;
3021. When S2 is less than the target value S1, the opening degree of the bypass electronic expansion valve is kept;
3022. When S2 > the target value S1, the bypass electronic expansion valve opening increases.
The invention has the beneficial effects that: the invention provides a precooling dehumidification method, which comprises the following steps: detecting the wet bulb temperature value at the air inlet of the condenser in real time; controlling the refrigerant flowing into the pre-cooling coil in real time according to the wet bulb temperature value; and precooling and dehumidifying the outdoor air at the air inlet of the condenser through the refrigerant. The problem of the prior art that the evaporative condenser is poor in cooling effect due to the fact that the evaporative condenser is affected by regional wet bulb temperature is solved, and through the fact that the precooling coil is added at the air inlet end of the condenser, the temperature of the air inlet wet bulb can be effectively reduced, and the heat exchange effect is improved; by adding the bypass electronic expansion valve at the outlet end of the heat exchange tube, the refrigerant flowing into the pre-cooling coil can be better controlled, and the wet bulb temperature can be accurately controlled.
The product can execute the method provided by the embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method. Technical details not described in detail in this embodiment may be found in the methods provided in the embodiments of the present invention.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A method of pre-cooling and dehumidifying, the method comprising:
detecting the wet bulb temperature value at the air inlet of the condenser in real time;
Controlling the refrigerant flowing into the pre-cooling coil in real time according to the wet bulb temperature value;
Precooling and dehumidifying the outdoor air at the air inlet of the condenser through the refrigerant;
The method for controlling the refrigerant flowing into the pre-cooling coil in real time according to the wet bulb temperature value comprises the following steps:
judging whether the wet bulb temperature value is equal to a preset wet bulb temperature value or not; if the cooling medium flows into the precooling coil, the bypass electronic expansion valve is adjusted to control the cooling medium flowing into the precooling coil;
if not, the adjusting the bypass electronic expansion valve specifically comprises:
When the wet bulb temperature value of the air inlet is smaller than the preset wet bulb temperature value, opening the bypass electronic expansion valve according to the preset opening degree, and keeping the preset opening degree of the bypass electronic expansion valve;
when the wet bulb temperature value of the air inlet is larger than the preset wet bulb temperature value, opening the bypass electronic expansion valve according to a preset opening degree, and increasing the opening degree of the bypass electronic expansion valve;
wherein, the inlet end of the pre-cooling coil is connected with the heat exchange tube of the condenser; the outlet end of the precooling coil pipe is connected with an evaporator; and the inlet end of the precooling coil pipe is connected with the heat exchange pipe through the bypass electronic expansion valve.
2. The method of claim 1, wherein the real-time detection of wet bulb temperature values at the condenser air intake includes:
when the condenser works, the wet bulb temperature value at the air inlet is detected in real time through the temperature and humidity sensor at the air inlet end of the condenser.
3. A pre-chill dehumidification apparatus, the apparatus comprising: a condenser, an evaporator and a temperature and humidity sensor; the condenser includes: a heat exchange tube; characterized in that the device is adapted to perform the method according to any one of claims 1 or2,
The device comprises a precooling coil pipe arranged at the air inlet end of the condenser; the temperature and humidity sensor is positioned at one end of the precooling coil; and the heat exchange tube is connected with the evaporator through a system electronic expansion valve.
4. A pre-cooling and dehumidifying system for use with the pre-cooling and dehumidifying apparatus of claim 3, the system comprising:
The detection module is used for detecting the wet bulb temperature value at the air inlet of the condenser in real time;
the control module is used for controlling the refrigerant flowing into the pre-cooling coil in real time according to the wet bulb temperature value;
And the precooling and dehumidifying module is used for precooling and dehumidifying the outdoor air at the air inlet of the condenser through the refrigerant.
5. The system of claim 4, wherein the detection module comprises:
And the temperature and humidity sensor is positioned at one end of the pre-cooling coil pipe and used for detecting the wet bulb temperature value at the air inlet in real time when the condenser works.
6. The system of claim 4, wherein the control module comprises:
The judging module is used for judging whether the wet bulb temperature value is equal to a preset wet bulb temperature value or not; if not, the bypass electronic expansion valve is adjusted to control the refrigerant flowing into the pre-cooling coil.
7. The system of claim 6, wherein the determination module comprises:
The opening maintaining module is used for opening the bypass electronic expansion valve according to a preset opening when the wet bulb temperature value of the air inlet is smaller than the preset wet bulb temperature value and maintaining the preset opening of the bypass electronic expansion valve;
And the opening increasing module is used for opening the bypass electronic expansion valve according to the preset opening and increasing the opening of the bypass electronic expansion valve when the wet bulb temperature value of the air inlet is larger than the preset wet bulb temperature value.
8. An air conditioning apparatus comprising the precooling dehumidification system as set forth in any one of claims 4-7.
9. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the method according to any of claims 1-2.
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| CN115537308A (en) * | 2021-09-10 | 2022-12-30 | 青岛海尔生物医疗科技有限公司 | Culture box |
| CN114251884A (en) * | 2021-12-14 | 2022-03-29 | 珠海格力电器股份有限公司 | Temperature control device and method and heat exchange unit |
| CN115789919A (en) * | 2022-12-05 | 2023-03-14 | 珠海格力电器股份有限公司 | Centralized air conditioner and control method and device thereof |
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