CN109237672B - Air conditioner and control method for air conditioner - Google Patents
Air conditioner and control method for air conditioner Download PDFInfo
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- CN109237672B CN109237672B CN201810958440.6A CN201810958440A CN109237672B CN 109237672 B CN109237672 B CN 109237672B CN 201810958440 A CN201810958440 A CN 201810958440A CN 109237672 B CN109237672 B CN 109237672B
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 239000003507 refrigerant Substances 0.000 claims abstract description 68
- 238000007791 dehumidification Methods 0.000 claims abstract description 38
- 238000005192 partition Methods 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims description 30
- 230000003247 decreasing effect Effects 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 abstract description 16
- 238000010438 heat treatment Methods 0.000 abstract description 15
- 238000004781 supercooling Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
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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
- 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
- F24F5/0007—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 cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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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Abstract
The invention discloses an air conditioner and a control method for the air conditioner, and belongs to the technical field of household appliances. The air conditioner includes: the system comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger and a throttling assembly, wherein the indoor heat exchanger comprises two partitions which are not communicated; the throttling assembly comprises a first throttling device and a second throttling device, and refrigerant enters two sections of the indoor heat exchanger through the first throttling device and the second throttling device respectively; further comprising: and the control device is connected with the first throttling device and the second throttling device and used for controlling the opening degrees of the first throttling device and the second throttling device when the air conditioner is in a constant-temperature dehumidification mode so as to respectively adjust the temperature of the two partitions of the indoor heat exchanger to be not higher than or not lower than the ambient temperature at the same time. The air conditioner provided by the invention has the advantages that the environment is dehumidified by refrigeration, the temperature is compensated by heating, constant-temperature dehumidification is realized, and the use comfort of a user is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a control method for the air conditioner.
Background
With the wide rise of smart homes, more and more household appliances have the dehumidification function. The air conditioner, as a home appliance for adjusting indoor temperature, also gradually increases the demand for dehumidification. The dehumidification of the existing air conditioner is realized by reducing the temperature and condensing indoor water vapor into liquid water. The process is often accompanied by the reduction of the indoor temperature, and the weather feels very sultry when the temperature is not high but the humidity is high, if the sultry needs to be eliminated, the temperature is often not required to be reduced, and only the humidity needs to be reduced. If the ordinary air conditioner starts to refrigerate, the temperature can be reduced along with the dehumidification effect, the aim of saving energy is often not achieved in the mode, and the use comfort degree of a user can be reduced through the temperature reduction operation.
Disclosure of Invention
The embodiment of the invention provides an air conditioner and a control method for the air conditioner, wherein refrigeration is used for dehumidifying the environment, heating is used for compensating the temperature, dehumidification is carried out under the condition of not reducing the environment temperature, constant-temperature dehumidification is realized, and the use comfort of a user is improved. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to a first aspect of embodiments of the present invention, there is provided an air conditioner including: the system comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger and a throttling assembly, wherein the indoor heat exchanger comprises two partitions which are not communicated; the throttling assembly comprises a first throttling device and a second throttling device, and refrigerant enters two sections of the indoor heat exchanger through the first throttling device and the second throttling device respectively; further comprising: and the control device is connected with the first throttling device and the second throttling device and used for controlling the opening degrees of the first throttling device and the second throttling device when the air conditioner is in a constant-temperature dehumidification mode so as to respectively adjust the temperature of the two partitions of the indoor heat exchanger to be not higher than or not lower than the ambient temperature at the same time.
Optionally, the first throttling device and the second throttling device are electronic expansion valves or thermal expansion valves.
Optionally, the method further comprises: the first temperature detection device is used for detecting the temperature regulated by the first throttling device; the second temperature detection device is used for detecting the temperature regulated by the second throttling device; an ambient temperature detection means for detecting an ambient temperature; the control device is also used for determining an average temperature according to the temperature detected by the first temperature detection device and the temperature detected by the second temperature detection device, and adjusting the opening degrees of the first throttling device and the second throttling device according to the difference value between the average temperature and the ambient temperature.
Optionally, the control device is further configured to: and when the difference value between the average temperature and the environment temperature is larger than or equal to the temperature difference set value, adjusting the opening degree of the throttling device lower than the environment temperature in the first throttling device or the second throttling device to increase so that the temperature of the refrigerant adjusted by the throttling device is reduced.
Optionally, the temperature difference set point is 0 ℃.
According to a first aspect of embodiments of the present invention, there is provided a control method for an air conditioner including: the indoor heat exchanger comprises two partitions which are not communicated, the throttling assembly comprises a first throttling device and a second throttling device, and refrigerant enters the two partitions of the indoor heat exchanger through the first throttling device and the second throttling device respectively; and a control device for adjusting the opening degrees of the first throttle device and the second throttle device; the method comprises the following steps: detecting a temperature of the refrigerant passing through the first throttling device; detecting a temperature of the refrigerant passing through the second throttling device; detecting the ambient temperature; determining a difference between an average temperature of the refrigerant of the first throttling device and the temperature of the refrigerant passing through the second throttling device and the ambient temperature; and adjusting the opening degrees of the first throttling device and the second throttling device according to the difference value.
Optionally, when the air conditioner is in a low temperature dehumidification mode, one of the temperatures of the refrigerant flowing through the two throttling devices is adjusted to be higher than the ambient temperature and the other is adjusted to be lower than the ambient temperature.
Alternatively, when the difference is greater than or equal to the temperature difference set value, the opening degree of the throttling device that adjusts the refrigerant temperature to be lower than the ambient temperature is increased, so that the temperature of the refrigerant flowing through the throttling device is decreased.
Alternatively, when the difference is less than the temperature difference set value, the opening degree of the throttling device that regulates the temperature of the refrigerant to be lower than the ambient temperature is decreased, so that the temperature of the refrigerant flowing through the throttling device is increased.
Optionally, the temperature difference set point is 0 ℃.
The air conditioner provided by the embodiment of the invention dehumidifies the environment by refrigeration, compensates the temperature by heating, dehumidifies under the condition of not reducing the environment temperature, realizes constant-temperature dehumidification and improves the use comfort of users.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural view illustrating an air conditioner according to an exemplary embodiment;
FIG. 2 is a schematic structural view for an air conditioner according to another exemplary embodiment;
FIG. 3 is a flowchart illustrating a control method for an air conditioner according to an exemplary embodiment;
FIG. 4 is a flowchart illustrating a control method for an air conditioner according to another exemplary embodiment;
fig. 5 is a flowchart illustrating a control method for an air conditioner according to another exemplary embodiment.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed. Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, 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 process, method, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. As for the methods, products and the like disclosed by the embodiments, the description is simple because the methods correspond to the method parts disclosed by the embodiments, and the related parts can be referred to the method parts for description.
Fig. 1 is a schematic structural view illustrating an air conditioner according to an exemplary embodiment. As shown in fig. 1, an air conditioner according to an embodiment of the present invention includes: the heat exchanger comprises a compressor 1, an indoor heat exchanger 15, an outdoor heat exchanger 5 and a throttling assembly, wherein the indoor heat exchanger 15 comprises two partitions which are not communicated; the throttling assembly comprises a first throttling device 9 and a second throttling device 10, and refrigerant enters two subareas of the indoor heat exchanger 15 through the first throttling device 9 and the second throttling device 10 respectively; further comprising: and the control device is connected with the first throttling device and the second throttling device and used for controlling the opening degrees of the first throttling device 9 and the second throttling device 10 when the air conditioner is in a constant-temperature dehumidification mode so as to respectively adjust the temperatures of the two subareas of the indoor heat exchanger 15 not to be higher than the ambient temperature or not to be lower than the ambient temperature.
In the above scheme, a high-temperature and high-pressure refrigerant is discharged from the compressor 1, passes through the four-way valve 4, the outdoor heat exchanger 5 and the thermostatic expansion valve 6 or passes through the one-way valve 7 during heating, and is transmitted to two disconnected subareas of the indoor heat exchanger 15 through the two throttling devices 9 and 10, the opening degrees of the two throttling devices are adjusted, so that one throttling device adjusts the temperature of the refrigerant to be lower than the indoor environment temperature, for example, the first throttling device 9 is used for weak refrigeration to perform dehumidification, for example, under the condition that the valve opening degree is small, the refrigerant is converted into a liquid state from a gas-liquid mixed state through the first throttling device 9, enters one subarea of the indoor heat exchanger 15, so that the subarea is in a weak refrigeration mode, and the moisture in the indoor environment is condensed into liquid water at a low temperature state, so as to achieve the dehumidification; the second throttling device 10 transmits the high-temperature and high-pressure refrigerant discharged by the compressor 1 to the indoor, and the opening degree of the second throttling device 10 is adjusted, so that the refrigerant enters another subarea of the indoor heat exchanger 15 under the condition of not changing the phase state to reach a weak heating mode for temperature compensation; the effect that two subregion of indoor heat exchanger appear is that a weak refrigeration dehumidifies, and another weak heating carries out temperature compensation, and two divisions combined action realize the function of constant temperature dehumidification. The air conditioner of the scheme dehumidifies without adding an additional dehumidifying device, simplifies the structure of the air conditioner, saves the manufacturing and purchasing cost and saves resources; and the dehumidification is carried out under the condition of constant temperature, the indoor temperature is not changed, the use comfort level of a user is improved, and the product strength of the air conditioner is improved.
In the above scheme, the first throttling device 9 and the second throttling device 10 are electronic expansion valves or thermal expansion valves.
Fig. 2 is a schematic structural diagram illustrating an air conditioner according to an exemplary embodiment. As shown in fig. 2, the air conditioner according to an embodiment of the present invention further includes: a first temperature detecting device 13 for detecting the temperature adjusted by the first throttling device 9; a second temperature detection device 14 for detecting the temperature adjusted by the second throttle device 10; an ambient temperature detection means 17 for detecting an ambient temperature; the control device is further configured to determine an average temperature according to the temperature detected by the first temperature detecting device 13 and the temperature detected by the second temperature detecting device 14, and adjust the opening degrees of the first throttling device 9 and the second throttling device 10 according to the difference between the average temperature and the ambient temperature.
In the foregoing solution, the control device is further configured to: when the difference between the average temperature and the ambient temperature is greater than or equal to the temperature difference set value, the opening degree of the throttle device lower than the ambient temperature in the first throttle device 9 or the second throttle device 10 is adjusted to be increased, where the first throttle device 9 is a throttle device for weak cooling, and the opening degree of the first throttle device 9 is adjusted to be increased so that the temperature of the refrigerant adjusted by the throttle device is decreased.
In the above scheme, the first temperature detection device 13 and the second temperature detection device 14 are further arranged to detect the refrigerant temperature regulated by the two throttling devices so as to realize accurate regulation of the temperature. When the constant temperature adjustment is needed, the temperature of the refrigerant adjusted by the first throttling device 9 is detected by the first temperature detection device 13, the temperature of the refrigerant adjusted by the second throttling device 10 is detected by the second temperature detection device 14, the average temperature of the refrigerant and the temperature of the refrigerant is determined to determine a temperature value after temperature compensation, the influence of constant temperature dehumidification on the indoor environment temperature is determined according to the difference between the average temperature and the indoor environment temperature detected by the using environment temperature detection device 17, when the difference between the average temperature and the indoor environment temperature is greater than or equal to a set temperature difference value, the indoor environment temperature is higher than expected/set, at the moment, the opening degree of the throttling device in the weak refrigeration mode is adjusted to be increased, so that the passing refrigerant is increased, and the indoor environment temperature is reduced; when the average temperature is lower than the set temperature difference value, the temperature regulated by the two throttling devices is lower than the indoor environment temperature, and the regulation mode is opposite to that when the average temperature is higher than the set temperature difference value, namely the opening degree of the throttling device for weak refrigeration is reduced, and the throughput of the refrigerant is reduced; alternatively, as another example, the opening degree of the throttle device in the weak heating state is increased to increase the indoor ambient temperature. According to the method, the temperature of the refrigerant adjusted by the throttling devices for weak refrigeration and weak heating is detected, compared with the indoor environment temperature, the adjusting mode is determined, the indoor environment temperature is monitored and accurately adjusted, the accuracy of the working mode of constant-temperature dehumidification is guaranteed, the intelligence of the air conditioner is improved, and the use comfort of a user is improved.
In the above solution, the ambient temperature detecting device 17 is a first ambient temperature detecting device, and is disposed on the return air side of the indoor heat exchanger 15, and as another example, further includes a second ambient temperature detecting device 18 disposed on the air outlet side of the indoor heat exchanger 15. The ambient temperature detected by the first ambient temperature detecting means 17 and the temperature detected by the second ambient temperature detecting means 18 are weighted and averaged to determine the ambient temperature.
In the above scheme, the temperature difference set value is 0 ℃. In the scheme, when the air conditioner works in a constant-temperature dehumidification working mode, the temperature difference set value is 0 ℃; and when the air conditioner is in the weak cooling dehumidification mode, the temperature difference set value may be set to be lower than 0 ℃, for example, -2 ℃; and when the air conditioner is in the weak heating dehumidification mode, the temperature difference set value may be set to be higher than 0 ℃, for example, 2 ℃; the constant-temperature, weak-refrigeration and weak-heating working modes during dehumidification are realized.
In the above scheme, the method further comprises: third and fourth temperature detecting means 11 and 12 are provided corresponding to the first and second temperature detecting means 13 and 14, respectively, at the front ends of the first and second throttling devices 9 and 10, respectively, to detect the refrigerant temperatures before adjustment by the first and second throttling devices 9 and 10. The third temperature detection device 11 and the fourth temperature detection device 12 are respectively matched with the first temperature detection device 11 and the second temperature detection device 14, and are respectively used for adjusting the supercooling degrees of the first throttling device 9 and the second throttling device 10.
In the above-described embodiment, the first throttle device 9 and the second throttle device 10 are electronic expansion valves. The third temperature detection means and the fourth temperature detection means are used for adjusting the supercooling degrees of the electronic expansion valves 9 and 10.
Fig. 3 is a flowchart illustrating a control method for an air conditioner according to an exemplary embodiment. As shown in fig. 3, a control method for an air conditioner according to an embodiment of the present invention includes: the indoor heat exchanger comprises two partitions which are not communicated, the throttling assembly comprises a first throttling device and a second throttling device, and refrigerant enters the two partitions of the indoor heat exchanger through the first throttling device and the second throttling device respectively; and control means for adjusting the opening degrees of said first throttle means and said second throttle means, as shown in fig. 1 or 2; the method comprises the following steps: detecting a temperature of the refrigerant passing through the first throttling means in step S110; in step S112, the temperature of the refrigerant passing through the second throttle device is detected; in step S114, an ambient temperature is detected; determining a difference between an average temperature of the refrigerant of the first throttle device and the temperature of the refrigerant passing through the second throttle device and the ambient temperature in step S120; in step S130, the opening degrees of the first throttle device and the second throttle device are adjusted according to the difference.
In the above scheme, a high-temperature and high-pressure refrigerant is discharged from a compressor, and is transmitted to two disconnected subareas of an indoor heat exchanger through two throttling devices, the opening degrees of the two throttling devices are adjusted, so that the temperature of the refrigerant is adjusted by one throttling device to be lower than the temperature of the indoor environment, so as to perform dehumidification; the other throttling device transmits the high-temperature and high-pressure refrigerant discharged by the compressor to the indoor, and the opening degree of the throttling device is adjusted to enable the refrigerant to enter the other partition of the indoor heat exchanger under the condition of not changing the phase state, so that a weak heating mode is achieved, and temperature compensation is performed; the effect that two subregion of indoor heat exchanger appear is that a weak refrigeration dehumidifies, and another weak heating carries out temperature compensation, and two divisions combined action realize the function of constant temperature dehumidification. The air conditioner of the scheme dehumidifies without adding an additional dehumidifying device, simplifies the structure of the air conditioner, saves the manufacturing and purchasing cost and saves resources; and the dehumidification is carried out under the condition of constant temperature, the indoor temperature is not changed, the use comfort level of a user is improved, and the product strength of the air conditioner is improved.
In the above scheme, when the air conditioner is in the low-temperature dehumidification mode, one of the temperatures of the refrigerant flowing through the two throttling devices is adjusted to be higher than the ambient temperature, and the other is adjusted to be lower than the ambient temperature.
Fig. 4 is a flowchart illustrating a control method for an air conditioner according to an exemplary embodiment. As shown in fig. 4, the control method for an air conditioner according to one embodiment of the present invention determines whether the difference between the average temperature and the ambient temperature is greater than or equal to a difference set value in step S132, and when the difference is greater than or equal to the difference set value, adjusts the opening degree of the throttling device having the refrigerant temperature lower than the ambient temperature to be increased, that is, adjusts the opening degree of the first throttling device to be increased, and/or adjusts the opening degree of the second throttling device to be decreased, such that the temperature of the refrigerant flowing through the throttling device is decreased in step S134.
In the above-described aspect, when the difference is smaller than the temperature difference setting value, in step S136, the opening degree of the throttling device, which adjusts the refrigerant temperature to be lower than the ambient temperature, is decreased, that is, the opening degree of the first throttling device is decreased, so that the temperature of the refrigerant flowing through the throttling device is increased. Or the opening degree of the second throttling device is adjusted to be increased, so that the effect of increasing the average temperature is achieved, and the indoor environment temperature is increased.
When the difference is equal to the temperature difference set value, it is inconvenient to maintain the opening degrees of the valves of the first and second throttling devices to maintain the existing ambient temperature.
In the above scheme, the temperature difference set value is 0 ℃.
In the scheme, the temperature of the refrigerant regulated by the two throttling devices is detected so as to realize accurate regulation of the temperature. When the constant temperature adjustment is needed, the temperature of the refrigerant adjusted by the first throttling device is detected, the temperature of the refrigerant adjusted by the second throttling device is detected, the average temperature of the refrigerant and the refrigerant is determined, so as to determine the temperature value after the temperature compensation is carried out, the influence of constant temperature dehumidification on the indoor environment temperature is determined according to the difference value between the average temperature and the indoor environment temperature, when the difference value between the average temperature and the indoor environment temperature is greater than or equal to the set temperature difference value, the indoor environment temperature is higher than the expected temperature or the set temperature, at the moment, the opening degree of the throttling device in the weak refrigeration mode is adjusted to be increased, so that the passing refrigerants are increased, and the indoor environment temperature is reduced; when the average temperature is lower than the set temperature difference value, the temperature regulated by the two throttling devices is lower than the indoor environment temperature, and the regulation mode is opposite to that when the average temperature is higher than the set temperature difference value, namely the opening degree of the throttling device for weak refrigeration is reduced, and the throughput of the refrigerant is reduced; alternatively, as another example, the opening degree of the throttle device in the weak heating state is increased to increase the indoor ambient temperature. According to the method, the temperature of the refrigerant adjusted by the throttling devices for weak refrigeration and weak heating is detected, compared with the indoor environment temperature, the adjusting mode is determined, the indoor environment temperature is monitored and accurately adjusted, the accuracy of the working mode of constant-temperature dehumidification is guaranteed, the intelligence of the air conditioner is improved, and the use comfort of a user is improved.
Fig. 5 is a flowchart illustrating a control method for an air conditioner according to another exemplary embodiment. As shown in fig. 5, a control method for an air conditioner according to another embodiment of the present invention further includes: after the valve opening degree of the first throttle device or the second throttle device is adjusted, the temperature of the refrigerant adjusted by the first throttle device and the second throttle device and the ambient temperature are cyclically detected, and the valve opening degree of the first throttle device or the second throttle device is adjusted according to the method shown in fig. 3 or 4. After the first throttling device and the second throttling device are comprehensively acted, the ambient temperature is not changed or is changed according to a set value, and the purpose of constant-temperature dehumidification is achieved.
A control logic of a control method for an air conditioner according to an exemplary embodiment is as follows:
1. when the air conditioner starts a constant temperature dehumidification mode, an indoor unit fan is firstly started to operate for 20s (or expressed by a second), and the indoor environment temperature of the current room is obtained through the average value of the detected first environment temperature detection device/sensor 17 and the detected second environment temperature detection device/sensor 18;
2. the control device/computer board of the indoor unit sends an instruction to the heat exchanger of the outdoor unit, the compressor is started to operate, and when the compressor is started to operate, the first throttling device/electronic expansion valve and the second throttling device/electronic expansion valve which are associated with the indoor heat exchanger are opened until 1/4 which takes the step number when the valve is fully opened as the reference until the starting process is finished, namely when the outdoor heat exchanger operates normally;
in the process, the outdoor unit electronic expansion valve 6 is always kept in a fully open state and throttled by a first throttling device/electronic expansion valve 9 and a second throttling device/electronic expansion valve 10 of the indoor unit;
3. the first and second throttle devices/electronic expansion valves 9 and 10 of the indoor unit perform supercooling degree control, for example, the supercooling degree setting value is 2 ℃, respectively, by the respective pre-valve and post-valve temperature sensors, i.e., the third temperature detection device 11 and the first temperature detection device 13, and the fourth temperature detection device 12 and the second temperature detection device 14, and the opening degree of the valve is adjusted according to the control.
Example (c):
if the supercooling degree is > 2 ℃ (the temperature of the temperature sensor before the valve minus the temperature of the temperature sensor after the valve, for example, the difference between the fourth temperature detecting means 12 and the second temperature detecting means 14 is the supercooling degree of the second throttle/electronic expansion valve 10). The throttle device/electronic expansion valve is opened in the existing steps to reduce the supercooling degree.
If the supercooling degree is less than 2 ℃, the throttle device/the electronic expansion valve is closed in the existing steps.
If the supercooling degree is 2 ℃, the throttle device/electronic expansion valve maintains the existing step number.
The first throttling device/electronic expansion valve 9 and the second throttling device/electronic expansion valve 10 do not adjust with the same supercooling degree set value as a target, if the adjustment is carried out at the same time, the operation process of adjusting by arranging an electronic expansion valve at an indoor machine of a common air conditioner is the same as that of adjusting by arranging an electronic expansion valve at the indoor machine of the common air conditioner.
The first and second throttle devices/electronic expansion valves 9, 10 are functionally and functionally identical. For example, after the air conditioner is started in the constant temperature dehumidification mode, the first throttling device/electronic expansion valve 9 regulates and controls the refrigerant entering the indoor heat exchanger to be cool, namely, in a weak refrigeration state; the second throttling device/electronic expansion valve 10 regulates and controls the refrigerant entering the indoor heat exchanger to be hot, the indoor heat exchanger controlled by the two paths of refrigerants has cold and hot division, and the air flowing through the indoor heat exchanger has cold and hot difference, so that low-temperature dehumidification and high-temperature compensation are realized. After the engine is started up next time or the state is accumulated for a certain time, the working modes of the first throttling device/electronic expansion valve 9 and the second throttling device/electronic expansion valve 10 are exchanged;
4. by detecting the temperature of the temperature detecting means/temperature sensor 13/14 after the throttle means/electronic expansion valve, by calculation, for example by averaging after addition (or calculating the expected temperature value using a different equation, possibly in combination with the fan speed), the resulting value is compared to the ambient temperature (as detected by the temperature sensor 17/18, typically the sum of which is divided by 2), if it is higher than the ambient temperature, the first throttle device/electronic expansion valve 9 is opened wide (if the electronic expansion valve 9 controls the cold refrigerant, its supercooling degree is reduced, for example, from 2 c to 1 c), meanwhile, the second throttling device/electronic expansion valve 10 is maintained at the current state, the temperature difference is continuously detected, and whether the second throttling device/electronic expansion valve 10 is adjusted in a valve closing mode or not is determined;
if the average (or the value derived from the equation) of the temperature sensing device/sensor 13/14 is lower than the ambient temperature, then the control method is reversed from the above;
5. the purpose of constant temperature dehumidification is gradually achieved through closed-loop regulation;
6. if the temperature set by the user during the dehumidification process is not the temperature at the time of the current machine operation, for example, the temperature set is lower than the temperature at the time of starting, the value calculated by the temperature detection device/temperature sensor 13/14 through the formula set is compared with the ambient temperature, and the opening degrees of the first throttle device/electronic expansion valve 9 and the second throttle device/electronic expansion valve 10 of the two indoor heat exchangers are gradually adjusted to achieve the purpose of setting the temperature.
According to the air conditioner and the control method for the air conditioner, the environment is dehumidified by refrigeration, the temperature is compensated by heating, dehumidification is performed under the condition that the environment temperature is not reduced, constant-temperature dehumidification is realized, and the use comfort of a user is improved.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention. It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. In the embodiments disclosed herein, it should be understood that the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed correspondence or direct correspondence or communication connection between each other may be through some interfaces, indirect correspondence or communication connection of devices or units, and may be in an electric, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment. In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
Claims (9)
1. An air conditioner comprising: compressor, indoor heat exchanger, outdoor heat exchanger and throttle subassembly, its characterized in that,
the indoor heat exchanger comprises two unconnected subareas;
the throttling assembly comprises a first throttling device and a second throttling device, and refrigerant enters two sections of the indoor heat exchanger through the first throttling device and the second throttling device respectively;
further comprising:
the control device is connected with the first throttling device and the second throttling device and used for controlling the opening degrees of the first throttling device and the second throttling device when the air conditioner is in a constant-temperature dehumidification mode so as to respectively regulate the temperatures of the two subareas of the indoor heat exchanger to be not higher than or not lower than the ambient temperature at the same time;
the first temperature detection device is used for detecting the temperature regulated by the first throttling device;
the second temperature detection device is used for detecting the temperature regulated by the second throttling device;
an ambient temperature detection means for detecting an ambient temperature;
the control device is also used for determining an average temperature according to the temperature detected by the first temperature detection device and the temperature detected by the second temperature detection device, and adjusting the opening degrees of the first throttling device and the second throttling device according to the difference value between the average temperature and the ambient temperature.
2. The air conditioner according to claim 1,
the first throttling device and the second throttling device are electronic expansion valves or thermal expansion valves.
3. The air conditioner according to claim 2, wherein the control device is further configured to:
and when the difference value between the average temperature and the environment temperature is larger than or equal to a temperature difference set value, adjusting the opening degree of the throttling device lower than the environment temperature in the first throttling device or the second throttling device to increase so that the temperature of the refrigerant adjusted by the throttling device is reduced.
4. The air conditioner of claim 3, wherein the temperature differential set point is 0 ℃.
5. A control method for an air conditioner, the air conditioner comprising: the indoor heat exchanger comprises two partitions which are not communicated, the throttling assembly comprises a first throttling device and a second throttling device, and refrigerant enters the two partitions of the indoor heat exchanger through the first throttling device and the second throttling device respectively; and a control device for adjusting the opening degrees of the first throttle device and the second throttle device; the method is characterized by comprising the following steps:
detecting a temperature of the refrigerant passing through the first throttling device;
detecting a temperature of the refrigerant passing through the second throttling device;
detecting the ambient temperature;
determining a difference between an average temperature of the refrigerant of the first throttling device and the temperature of the refrigerant passing through the second throttling device and the ambient temperature;
and adjusting the opening degrees of the first throttling device and the second throttling device according to the difference value.
6. The method as claimed in claim 5, wherein when the air conditioner is in a low temperature dehumidification mode, the temperature of refrigerant flowing through two throttling means is adjusted to be higher one than the ambient temperature and lower the other than the ambient temperature.
7. The method of claim 6, wherein when the difference is greater than or equal to a temperature difference set point, the opening degree of the throttling device that regulates the refrigerant temperature to be lower than the ambient temperature is increased such that the temperature of the refrigerant flowing through the throttling device is decreased.
8. The method of claim 6, wherein when the difference is less than a temperature difference set point, the opening of the throttling device that regulates the refrigerant temperature to be less than the ambient temperature is decreased such that the temperature of the refrigerant flowing through the throttling device is increased.
9. The method of claim 7 or 8, wherein the temperature differential set point is 0 ℃.
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| CN201810958440.6A CN109237672B (en) | 2018-08-22 | 2018-08-22 | Air conditioner and control method for air conditioner |
| PCT/CN2018/115668 WO2020037848A1 (en) | 2018-08-22 | 2018-11-15 | Air conditioner and control method for air conditioner |
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| CN201810958440.6A CN109237672B (en) | 2018-08-22 | 2018-08-22 | Air conditioner and control method for air conditioner |
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| CN109237672B true CN109237672B (en) | 2021-06-22 |
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| CN111442487B (en) * | 2020-03-19 | 2021-11-23 | 青岛海尔空调器有限总公司 | Air conditioner control method and system |
| CN111473492A (en) * | 2020-04-07 | 2020-07-31 | 广东美的制冷设备有限公司 | Control method of air conditioner, air conditioner and computer readable storage medium |
| CN114517969A (en) * | 2022-04-02 | 2022-05-20 | 珠海市金品创业共享平台科技有限公司 | Control system and method for constant temperature of air conditioner, related equipment and air conditioner |
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| WO2020037848A1 (en) | 2020-02-27 |
| CN109237672A (en) | 2019-01-18 |
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Effective date of registration: 20210608 Address after: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant after: QINGDAO HAIER AIR-CONDITIONING ELECTRONIC Co.,Ltd. Applicant after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant before: QINGDAO HAIER AIR-CONDITIONING ELECTRONIC Co.,Ltd. |
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