CN109556257B - Air conditioner and dehumidification control method thereof - Google Patents
Air conditioner and dehumidification control method thereof Download PDFInfo
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- CN109556257B CN109556257B CN201811314523.8A CN201811314523A CN109556257B CN 109556257 B CN109556257 B CN 109556257B CN 201811314523 A CN201811314523 A CN 201811314523A CN 109556257 B CN109556257 B CN 109556257B
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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
- 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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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Abstract
The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner and a dehumidification control method thereof. The invention aims to solve the problems that the existing air conditioner has poor dehumidification effect and influences the air output of the air conditioner when dehumidifying in a mode of reducing the air output. Therefore, the indoor unit comprises a first heat exchange branch and a second heat exchange branch which are arranged in parallel, wherein the first heat exchange branch is provided with a first heat exchanger and a first expansion valve, and the second heat exchange branch is provided with a second heat exchanger and a second expansion valve; the dehumidification control method of the invention comprises the following steps: acquiring the dew point temperature of indoor air; acquiring the saturated evaporation temperature of the indoor unit; according to the dew point temperature of indoor air and the saturated evaporation temperature of the indoor unit, the opening degree of the first expansion valve and/or the second expansion valve is/are selectively adjusted, so that the air supply quantity of the air conditioner can be effectively prevented from being influenced on the basis of effectively improving the dehumidification capacity of the air conditioner.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner and a dehumidification control method thereof.
Background
Along with the continuous improvement of living standard of people, people also put forward higher and higher requirements on living environment. In order to maintain a comfortable ambient temperature, an air conditioner has become an indispensable equipment in human life. In recent years, in order to further improve the comprehensive performance of air conditioners, many existing air conditioners are provided with a dehumidification function; however, the dehumidification function of the existing air conditioner still has many disadvantages.
Specifically, the existing air conditioner usually adopts the mode of reducing the air volume to achieve the dehumidification effect, namely, the dehumidification is carried out through the low-speed gear of the air conditioner fan, however, because different use environments have different dehumidification requirements, the method of carrying out the dehumidification through reducing the air volume can not only achieve the good dehumidification effect, but also can influence the air volume of the air conditioner. In addition, when the ambient humidity is reduced to a certain value, the outlet air temperature of the air conditioner is higher than the dew point temperature of the return air of the room, and in this case, the dehumidification function can be completely lost by the dehumidification mode.
Accordingly, there is a need in the art for a new air conditioner and a dehumidification control method thereof to solve the above-mentioned problems.
Disclosure of Invention
In order to solve the above-mentioned problems in the prior art, that is, to solve the problem that the existing air conditioner has not only a poor dehumidification effect but also an influence on the air output of the air conditioner when performing dehumidification by reducing the air output, the present invention provides a dehumidification control method for an air conditioner, in which an indoor unit of the air conditioner includes a first heat exchange branch and a second heat exchange branch arranged in parallel, a first heat exchanger and a first expansion valve are arranged on the first heat exchange branch, a second heat exchanger and a second expansion valve are arranged on the second heat exchange branch, and the dehumidification control method includes: acquiring the dew point temperature of indoor air; acquiring the saturated evaporation temperature of the indoor unit; and selectively adjusting the opening degree of the first expansion valve and/or the second expansion valve according to the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit.
In the above-described dehumidification control method for an air conditioner, the step of "selectively adjusting the opening degree of the first expansion valve and/or the second expansion valve in accordance with the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit" includes: and if the difference value between the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit is less than a first preset temperature, adjusting the opening degree of the first expansion valve to zero and maintaining the current opening degree of the second expansion valve.
In the above-described dehumidification control method for an air conditioner, in a case where the opening degree of the first expansion valve is adjusted to zero, the dehumidification control method further includes: and after a preset time, selectively adjusting the opening degree of the second expansion valve according to the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit.
In a preferred embodiment of the dehumidification control method for an air conditioner, the step of selectively adjusting the opening degree of the second expansion valve according to the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit after a preset time period includes: and after the preset time, if the difference between the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit is less than a second preset temperature, reducing the opening degree of the second expansion valve.
In a preferred embodiment of the dehumidification control method for an air conditioner, the step of selectively adjusting the opening degree of the second expansion valve according to the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit after a preset time period further includes: after a preset time, if the difference between the dew point temperature of the indoor air and the saturated evaporating temperature of the indoor unit is equal to the second preset temperature, the second expansion valve is kept at the current opening degree.
In a preferred embodiment of the dehumidification control method for an air conditioner, the step of selectively adjusting the opening degree of the second expansion valve according to the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit after a preset time period further includes: and after the preset time, if the difference between the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit is greater than the second preset temperature, increasing the opening degree of the second expansion valve.
In a preferable technical solution of the above dehumidification control method for an air conditioner, the first preset temperature is equal to the second preset temperature.
In the above-described dehumidification control method for an air conditioner, the step of "selectively adjusting the opening degree of the first expansion valve and/or the second expansion valve in accordance with the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit" further includes: and if the difference between the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit is equal to the first preset temperature, the opening degrees of the first expansion valve and the second expansion valve are not adjusted.
In the above-described dehumidification control method for an air conditioner, the step of "selectively adjusting the opening degree of the first expansion valve and/or the second expansion valve in accordance with the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit" further includes: and if the difference value between the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit is greater than the first preset temperature, increasing the opening degrees of the first expansion valve and the second expansion valve.
The invention also provides an air conditioner, which comprises a controller, wherein the controller can execute the dehumidification control method in any one of the preferable technical scheme.
As can be understood by those skilled in the art, in the technical solution of the present invention, an indoor unit of an air conditioner according to the present invention includes a first heat exchange branch and a second heat exchange branch arranged in a parallel relationship, the first heat exchange branch is provided with a first heat exchanger and a first expansion valve, the second heat exchange branch is provided with a second heat exchanger and a second expansion valve, and the dehumidification control method includes: acquiring the dew point temperature of indoor air; acquiring the saturated evaporation temperature of the indoor unit; and selectively adjusting the opening degree of the first expansion valve and/or the second expansion valve according to the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit. The invention judges the proportion of water vapor in the air liquefied into water in a latent heat mode through the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit so as to judge whether the dehumidification capability of the air conditioner can meet the dehumidification requirement of a user, and then selectively adjusts the opening degree of the first expansion valve and/or the second expansion valve according to the dehumidification capability of the air conditioner so as to ensure that the dehumidification capability of the air conditioner can be matched with the dehumidification requirement of the user all the time, thereby effectively ensuring the dehumidification effect and simultaneously effectively ensuring the heat exchange quantity and the air supply quantity of the air conditioner so as to effectively ensure that the heat exchange range of the air conditioner is not influenced.
Further, in a preferred embodiment of the present invention, if a difference between a dew point temperature of the indoor air and a saturated evaporating temperature of the indoor unit is less than the first preset temperature, the controller determines that a dehumidifying capacity of the air conditioner is insufficient to meet a dehumidifying demand, in which case the controller adjusts the opening degree of the first expansion valve to zero and maintains the current opening degree of the second expansion valve. It can be understood that, under the condition that the first expansion valve is closed, no heat exchange medium passes through the first heat exchanger, the evaporating pressure and the evaporating temperature of the indoor unit are both sharply reduced, so that the difference between the dew point temperature of the indoor air and the saturated evaporating temperature of the indoor unit is rapidly increased, and the dehumidification capacity of the air conditioner is rapidly improved, so that the air conditioner can meet the dehumidification demand of a user as soon as possible.
Further, in a preferred embodiment of the present invention, in a case where the opening degree of the first expansion valve is adjusted to zero, the controller may be further configured to selectively adjust the opening degree of the second expansion valve according to a dew point temperature of the indoor air and a saturated evaporating temperature of the indoor unit after a preset time has elapsed. Under the condition that the opening degree of the first expansion valve is adjusted to be zero, the controller can continuously judge the proportion of water vapor in the air liquefied into water in a latent heat mode through the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit so as to judge whether the dehumidification capacity of the air conditioner can meet the dehumidification requirement of a user, and then selectively adjust the opening degree of the second expansion valve according to the dehumidification capacity of the air conditioner, so that the dehumidification capacity of the air conditioner can be always matched with the requirement of the user.
Further, in a preferred embodiment of the present invention, when the opening degree of the first expansion valve is adjusted to be zero, after a preset time, if a difference between a dew point temperature of the indoor air and a saturated evaporation temperature of the indoor unit is less than the second preset temperature, the controller determines that the dehumidification capacity of the air conditioner still cannot meet the user requirement, and therefore, the controller controls the opening degree of the second expansion valve to be decreased, so that the saturated evaporation temperature of the indoor unit can be further decreased, the dehumidification capacity of the air conditioner is further improved, and the dehumidification capacity of the air conditioner can meet the user requirement as soon as possible.
Further, in a preferred embodiment of the present invention, after a preset time elapses after the opening degree of the first expansion valve is adjusted to zero, if a difference between a dew point temperature of the indoor air and a saturated evaporation temperature of the indoor unit is equal to the second preset temperature, the controller determines that the dehumidification capacity of the air conditioner is sufficient to meet the dehumidification demand of the user, and in this case, the controller does not adjust the opening degree of the second expansion valve, so as to effectively ensure that the dehumidification capacity of the air conditioner can meet the demand of the user.
Furthermore, in a preferred embodiment of the present invention, when the opening degree of the first expansion valve is adjusted to be zero, after a preset time, if a difference between a dew point temperature of the indoor air and a saturated evaporation temperature of the indoor unit is greater than a second preset temperature, the controller determines that the dehumidification capacity of the air conditioner at this time exceeds a user requirement, and in this case, the controller increases the opening degree of the second expansion valve to make the dehumidification capacity of the air conditioner meet the user dehumidification requirement, so that the heat exchange capacity of the air conditioner can be effectively ensured on the basis of ensuring that the user dehumidification requirement is met.
Further, in a preferred embodiment of the present invention, if a difference between a dew point temperature of the indoor air and a saturated evaporating temperature of the indoor unit is equal to the first preset temperature, the controller determines that the dehumidification capability of the air conditioner can meet the dehumidification requirement of the user, and in this case, the controller does not adjust the opening degrees of the first expansion valve and the second expansion valve, so as to ensure the heat exchange capability of the air conditioner effectively on the basis of ensuring that the dehumidification capability of the air conditioner can meet the requirement of the user.
Further, in a preferred embodiment of the present invention, if the difference between the dew point temperature of the indoor air and the saturated evaporating temperature of the indoor unit is greater than the first preset temperature, the controller determines that the dehumidification capacity of the air conditioner has far exceeded the user requirement, and in this case, the controller increases the opening degrees of the first expansion valve and the second expansion valve, so that the heat exchange capacity of the air conditioner can be effectively improved, and the dehumidification capacity of the air conditioner can be stably reduced until the dehumidification capacity is close to the user requirement, so that the heat exchange capacity of the air conditioner can be effectively ensured not to be affected on the basis of ensuring that the user dehumidification requirement is met.
Drawings
Fig. 1 is a partial structural schematic view of an air conditioner of the present invention;
FIG. 2 is a flow chart of the main steps of the dehumidification control method of the present invention;
fig. 3 is a flowchart of the steps of a preferred embodiment of the dehumidification control method of the present invention.
Reference numerals: 1. a liquid supply tube; 2. a first expansion valve; 3. a first heat exchanger; 4. an air inlet temperature and humidity sensor; 5. an air outlet temperature and humidity sensor; 6. a second heat exchanger; 7. a pressure sensor; 8. a temperature sensor; 9. a second expansion valve; 10. and an air outlet pipe.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. For example, although the steps of the method of the present invention are described herein in a particular order, these orders are not limiting, and one skilled in the art may perform the steps in a different order without departing from the underlying principles of the invention. Furthermore, in the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring first to fig. 1, a partial structure of an air conditioner according to the present invention is schematically shown. As shown in fig. 1, the indoor unit of an air conditioner of the present invention includes a main circulation loop (not shown in the figure) and a first heat exchange branch and a second heat exchange branch arranged in parallel, wherein the main circulation loop supplies a heat exchange medium to the first heat exchange branch and the second heat exchange branch through a liquid supply pipe 1, a first heat exchanger 3 and a first expansion valve 2 are arranged on the first heat exchange branch, a second heat exchanger 6 and a second expansion valve 9 are arranged on the second heat exchange branch, the heat exchange medium in the first heat exchanger 3 and the heat exchange medium in the second heat exchanger 6 both return to the main circulation loop through an air outlet pipe 10, the first expansion valve 2 can control the amount of the heat exchange medium flowing into the first heat exchanger 3, and the second expansion valve 9 can control the amount of the heat exchange medium flowing into the second heat exchanger 6. Meanwhile, the air inlet temperature and humidity sensor 4 is used for detecting the air inlet dry bulb temperature and the air outlet wet bulb temperature of the air conditioner, and the air outlet temperature and humidity sensor 5 is used for detecting the air outlet dry bulb temperature and the air outlet wet bulb temperature of the air conditioner. The pressure sensor 7 is used for detecting the evaporation pressure of the indoor unit, and the temperature sensor 8 is used for detecting the evaporation temperature of the air pipe 10. The air conditioner also comprises a controller, wherein the controller can acquire the detection information of each sensor and can control the operation of the air conditioner; of course, the controller may be an original controller of the air conditioner, or may be a controller separately provided to operate the dehumidification control method of the present invention. It can be understood by those skilled in the art that the present invention does not limit the specific structure of the air conditioner, and those skilled in the art can set the specific structure of the air conditioner according to the actual use requirement, as long as the indoor unit of the air conditioner includes at least two heat exchangers and the controller can execute the dehumidification control method of the present invention.
Referring next to fig. 2, a flowchart of the main steps of the dehumidification control method of the present invention is shown. As shown in fig. 2, based on the air conditioner described in the above embodiment, the dehumidification control method of the present invention mainly includes the following steps:
s1: acquiring the dew point temperature of indoor air;
s2: acquiring the saturated evaporation temperature of the indoor unit;
s3: the opening degree of the first expansion valve and/or the second expansion valve is selectively adjusted according to the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit.
Further, in step S1, the controller may acquire a dew point temperature of the indoor air; it should be noted that, the present invention does not limit the manner in which the controller obtains the dew point temperature of the indoor air, as long as the controller can obtain the dew point temperature of the indoor air. Next, in step S2, the controller may acquire a saturated evaporation temperature of the indoor unit; the controller may calculate the saturated evaporation temperature of the indoor unit from the evaporation pressure detected by the pressure sensor 7, or may directly use the evaporation temperature detected by the temperature sensor 8 as the saturated evaporation temperature of the indoor unit, as long as the controller can obtain the saturated evaporation temperature of the indoor unit. Further, it can also be understood by those skilled in the art that the execution order of the steps S1 and S2 may be changed, and the steps S1 and S2 may also be executed simultaneously, such change of the specific execution order does not depart from the basic principle of the present invention.
Further, in step S3, the controller may selectively adjust the opening degree of the first expansion valve and/or the second expansion valve according to a dew point temperature of the indoor air and a saturated evaporation temperature of the indoor unit. It can be understood that the controller may compare the dew point temperature of the indoor air with the saturated evaporating temperature of the indoor unit, or may compare the difference between the dew point temperature of the indoor air and the saturated evaporating temperature of the indoor unit with a preset value; in other words, the technician can set the specific determination condition according to the actual use requirement, as long as the determination condition takes the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit as the basic parameters. In addition, it should be noted that the controller may only adjust the first expansion valve 2, may only adjust the second expansion valve 9, may not adjust the first expansion valve 2 and the second expansion valve 9, or may even adjust the first expansion valve 2 and the second expansion valve 9 simultaneously, and a technician may set the adjustment mode according to actual needs.
Referring next to fig. 3, a flowchart illustrating steps of a dehumidification control method according to a preferred embodiment of the present invention is shown. As shown in fig. 3, based on the air conditioner described in the above embodiment, a preferred embodiment of the dehumidification control method of the present invention specifically includes the following steps:
s101: acquiring the dew point temperature of indoor air and the saturated evaporation temperature of an indoor unit;
s102: calculating the difference between the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit;
s103: if the difference between the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit is less than a first preset temperature, adjusting the opening degree of the first expansion valve to zero and maintaining the current opening degree of the second expansion valve;
s104: if the difference value between the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit is equal to a first preset temperature, the opening degrees of the first expansion valve and the second expansion valve are not adjusted;
s105: if the difference value between the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit is greater than a first preset temperature, the opening degrees of the first expansion valve and the second expansion valve are increased;
s106: after the preset time, if the difference between the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit is less than a second preset temperature, reducing the opening degree of the second expansion valve;
s107: after the preset time, if the difference value between the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit is equal to a second preset temperature, maintaining the current opening degree of the second expansion valve;
s108: after the preset time, if the difference between the dew point temperature of the indoor air and the saturated evaporating temperature of the indoor unit is greater than a second preset temperature, the opening degree of the second expansion valve is increased.
Further, in step S101, the controller may obtain a dew point temperature of indoor air and a saturated evaporating temperature of the indoor unit; it should be noted that, the invention does not limit the way in which the controller obtains the dew point temperature of the indoor air, as long as the controller can obtain the dew point temperature of the indoor air; meanwhile, the controller may calculate the saturated evaporation temperature of the indoor unit according to the evaporation pressure detected by the pressure sensor 7, or may directly use the evaporation temperature detected by the temperature sensor 8 as the saturated evaporation temperature of the indoor unit, as long as the controller can obtain the saturated evaporation temperature of the indoor unit. Furthermore, it can be understood by those skilled in the art that the present invention does not impose any limitation on the sequence of obtaining the dew point temperature of the indoor air and the saturated evaporating temperature of the indoor unit, and the controller can also obtain the dew point temperature of the indoor air and the saturated evaporating temperature of the indoor unit at the same time, and the change of the specific obtaining sequence does not depart from the basic principle of the present invention.
Further, in step S102, the controller may calculate a difference between a dew point temperature of indoor air and a saturated evaporating temperature of the indoor unit. It can be understood by those skilled in the art that, although the difference between the dew point temperature of the indoor air and the saturated evaporating temperature of the indoor unit is calculated as the judgment parameter in the preferred embodiment; however, the skilled person may set the determination parameter of the dehumidification control method according to actual use requirements, for example, a ratio of a dew point temperature of the indoor air to a saturated evaporation temperature of the indoor unit may be used as the determination parameter.
Further, in step S103, if the controller determines that the difference between the dew point temperature of the indoor air and the saturated evaporating temperature of the indoor unit is less than the first preset temperature, the controller may adjust the opening degree of the first expansion valve 2 to zero and maintain the current opening degree of the second expansion valve 9. It should be noted that although the first expansion valve 2 is closed in the preferred embodiment, the controller may obviously close the second expansion valve 9, and this change does not depart from the basic principle of the present invention, and the control mode of the controller can be set by the skilled person according to the actual use requirement. In addition, as can be understood by those skilled in the art, the specific value of the first preset temperature can be set by those skilled in the art according to the actual use requirement.
Further, in step S106, if the controller determines that the difference between the dew point temperature of the indoor air and the saturated evaporating temperature of the indoor unit is less than the second preset temperature after a predetermined time elapses while the opening degree of the first expansion valve 2 is adjusted to zero, the controller controls the opening degree of the second expansion valve 9 to be decreased. In addition, as can be understood by those skilled in the art, the specific values of the preset time and the second preset temperature can be set by the skilled in the art according to actual use requirements; preferably, the preset time is three minutes, and the first preset temperature is equal to the second preset temperature. It should be noted that a technician can set the reduction rate of the opening degree of the second expansion valve 9 at his or her discretion according to the actual use requirement.
Further, in step S107, in the case where the opening degree of the first expansion valve 2 is adjusted to zero, if the controller determines that the difference between the dew point temperature of the indoor air and the saturated evaporating temperature of the indoor unit is equal to the second preset temperature after a predetermined time has elapsed, the controller controls the opening degree of the second expansion valve 9 to increase. Further, it will be understood by those skilled in the art that the speed of increasing the opening degree of the second expansion valve 9 can be set by those skilled in the art according to the actual use requirement.
Further, in step S108, if the controller determines that the difference between the dew point temperature of the indoor air and the saturated evaporating temperature of the indoor unit is greater than the second preset temperature after a predetermined time elapses while the opening degree of the first expansion valve 2 is adjusted to zero, the controller controls the second expansion valve 9 to maintain the current opening degree.
Further, in step S104, if the controller determines that the difference between the dew point temperature of the indoor air and the saturated evaporating temperature of the indoor unit is equal to the first preset temperature, the controller does not make any adjustment on the opening degrees of the first expansion valve 2 and the second expansion valve 9 even though the first expansion valve 2 and the second expansion valve 9 maintain the current opening degrees.
Further, in step S105, if the controller determines that the difference between the dew point temperature of the indoor air and the saturated evaporating temperature of the indoor unit is greater than the first preset temperature, the controller controls the opening degrees of the first expansion valve 2 and the second expansion valve 9 to be increased synchronously, and of course, a technician may set the increasing speeds of the opening degrees of the first expansion valve 2 and the second expansion valve 9 according to actual use requirements. Further, it can be understood by those skilled in the art that although the controller in the present preferred embodiment controls the opening degrees of the first expansion valve 2 and the second expansion valve 9 to be increased in synchronization; however, it is obvious that the controller may also control the rate of increase of the opening degrees of the first expansion valve 2 and the second expansion valve 9, respectively, and this specific control manner may be changed without departing from the basic principle of the present invention.
Finally, it should be noted that the above examples are all preferred embodiments of the present invention, and should not be construed as limiting the scope of the present invention. When the present invention is actually used, a part of the steps may be added or deleted as needed or the order between the different steps may be changed by those skilled in the art. Such variations are not to be regarded as a departure from the spirit and scope of the invention.
So far, the preferred embodiments of the present invention have been described in conjunction with the accompanying drawings, but it is apparent to those skilled in the art that the scope of the present invention is not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (9)
1. A dehumidification control method for an air conditioner is characterized in that an indoor unit of the air conditioner comprises a first heat exchange branch and a second heat exchange branch which are arranged in a parallel connection mode, a first heat exchanger and a first expansion valve are arranged on the first heat exchange branch, a second heat exchanger and a second expansion valve are arranged on the second heat exchange branch, and the dehumidification control method comprises the following steps:
acquiring the dew point temperature of indoor air;
acquiring the saturated evaporation temperature of the indoor unit;
selectively adjusting the opening degree of the first expansion valve and/or the second expansion valve according to the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit;
the step of selectively adjusting the opening degree of the first expansion valve and/or the second expansion valve according to the dew point temperature of the indoor air and the saturated evaporating temperature of the indoor unit includes:
and if the difference value between the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit is less than a first preset temperature, adjusting the opening degree of the first expansion valve to zero and maintaining the current opening degree of the second expansion valve.
2. The dehumidification control method according to claim 1, wherein in a case where the opening degree of the first expansion valve is adjusted to zero, the dehumidification control method further comprises:
and after a preset time, selectively adjusting the opening degree of the second expansion valve according to the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit.
3. The dehumidification control method according to claim 2, wherein the step of selectively adjusting the opening degree of the second expansion valve according to the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit after a preset time period comprises:
and after the preset time, if the difference between the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit is less than a second preset temperature, reducing the opening degree of the second expansion valve.
4. The dehumidification control method according to claim 3, wherein the step of selectively adjusting the opening degree of the second expansion valve according to the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit after a preset time further comprises:
after a preset time, if the difference between the dew point temperature of the indoor air and the saturated evaporating temperature of the indoor unit is equal to the second preset temperature, the second expansion valve is kept at the current opening degree.
5. The dehumidification control method according to claim 4, wherein the step of selectively adjusting the opening degree of the second expansion valve according to the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit after a preset time further comprises:
and after the preset time, if the difference between the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit is greater than the second preset temperature, increasing the opening degree of the second expansion valve.
6. The dehumidification control method according to any one of claims 3 to 5, wherein the first preset temperature is equal to the second preset temperature.
7. The dehumidification control method according to claim 1, wherein the step of selectively adjusting the opening degree of the first expansion valve and/or the second expansion valve according to the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit further comprises:
and if the difference between the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit is equal to the first preset temperature, the opening degrees of the first expansion valve and the second expansion valve are not adjusted.
8. The dehumidification control method according to claim 1, wherein the step of selectively adjusting the opening degree of the first expansion valve and/or the second expansion valve according to the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit further comprises:
and if the difference value between the dew point temperature of the indoor air and the saturated evaporation temperature of the indoor unit is greater than the first preset temperature, increasing the opening degrees of the first expansion valve and the second expansion valve.
9. An air conditioner characterized by comprising a controller capable of executing the dehumidification control method according to any one of claims 1 to 8.
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| CN113566384B (en) * | 2021-07-23 | 2022-07-19 | 青岛海尔空调器有限总公司 | Control method for preventing indoor machine of air conditioner from condensation and storage medium |
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Effective date of registration: 20211105 Address after: 230601 plant 1, 2 and 3, Haier Innovation Industrial Park, 3456 Shixin Road, Hefei Economic and Technological Development Zone, Anhui Province Patentee after: HEFEI HAIER AIR CONDITIONING ELECTRONIC Co.,Ltd. Patentee after: QINGDAO HAIER AIR-CONDITIONING ELECTRONIC Co.,Ltd. Patentee after: Haier Zhijia Co.,Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Patentee before: QINGDAO HAIER AIR-CONDITIONING ELECTRONIC Co.,Ltd. Patentee before: Haier Zhijia Co.,Ltd. |
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