CN107726475B - Air conditioner - Google Patents
Air conditioner Download PDFInfo
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- CN107726475B CN107726475B CN201710946019.9A CN201710946019A CN107726475B CN 107726475 B CN107726475 B CN 107726475B CN 201710946019 A CN201710946019 A CN 201710946019A CN 107726475 B CN107726475 B CN 107726475B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/20—Electric components for separate outdoor units
- F24F1/24—Cooling of electric components
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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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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- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioner, which comprises: a compressor having an exhaust port, a return port, and a make-up port; an outdoor heat exchanger and an indoor heat exchanger; an outer machine throttle valve and an inner machine throttle valve; the cooling device is used for cooling the electric control device and comprises a first refrigerant flow path and a second refrigerant flow path, one end of the first refrigerant flow path is connected with the air supplementing port, and one end of the second refrigerant flow path is connected with the air return port; two ends of the first throttle valve are respectively connected with the second end of the outer machine throttle valve and the other end of the first refrigerant flow path; and two ends of the second throttle valve are respectively connected with the second end of the outer machine throttle valve and the other end of the second refrigerant flow path. According to the air conditioner, the air conditioner not only ensures the cooling requirement of the electric control device, but also avoids the condensation phenomenon on the surface of the cooling device, simplifies the structure of the electric control device and reduces the cost.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to an air conditioner.
Background
To powerful electrically controlled device, key parts such as electrically controlled device's contravariant module and rectifier module can produce a large amount of heats at the during operation, need effectual cooling to ensure the stability of electrically controlled device work, among the correlation technique, adopt the refrigerant cooling mode among the refrigerating system to cool off electrically controlled device, the refrigerant of low temperature low pressure directly gets back to the compressor behind the cooling device who links to each other with electrically controlled device, the cooling effect is good, but there is the risk of condensation when electrically controlled device generates heat less, need extra dehydrating unit, make electrically controlled device's structure complicated, and then increased electrically controlled device's cost.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the air conditioner which not only ensures the cooling requirement of the electric control device, but also avoids the condensation phenomenon on the surface of the cooling device, simplifies the structure of the electric control device and reduces the cost.
An air conditioner according to an embodiment of the present invention includes: a compressor having a discharge port, a return port, and a make-up port; the first end of the outdoor heat exchanger is connected with one of the air exhaust port and the air return port, and the first end of the indoor heat exchanger is connected with the other one of the air exhaust port and the air return port; the first end of the outer machine throttle valve is connected with the second end of the outdoor heat exchanger, and the two ends of the inner machine throttle valve are respectively connected with the second end of the indoor heat exchanger and the second end of the outer machine throttle valve; the cooling device is used for cooling the electric control device and comprises a first refrigerant flow path and a second refrigerant flow path, one end of the first refrigerant flow path is connected with the air supplementing port, and one end of the second refrigerant flow path is connected with the air returning port; the two ends of the first throttle valve are respectively connected with the second end of the outer machine throttle valve and the other end of the first refrigerant flow path; and two ends of the second throttle valve are respectively connected with the second end of the outer machine throttle valve and the other end of the second refrigerant flow path.
According to the air conditioner provided by the embodiment of the invention, the cooling device comprises the first refrigerant flow path and the second refrigerant flow path, and the first throttle valve and the second throttle valve can be controlled to respectively regulate and control the evaporation temperature of the refrigerant in the first refrigerant flow path and the second refrigerant flow path, so that the temperature of the cooling device is controlled in a proper range, the cooling requirement of the electric control device is ensured, the condensation phenomenon on the surface of the cooling device is avoided, the structure of the electric control device is simplified, and the cost is reduced.
In some embodiments of the present invention, the cooling device includes an inner tube and an outer tube, the inner tube is located inside the outer tube, the inner tube defines the first refrigerant flow path, and a space between an inner circumferential wall of the outer tube and an outer circumferential wall of the inner tube defines the second refrigerant flow path.
In some embodiments of the present invention, two circulation pipes are disposed on the cooling device at intervals, and the two circulation pipes define the first refrigerant flow path and the second refrigerant flow path.
In some embodiments of the present invention, the air conditioner further includes a four-way valve, the four-way valve includes an exhaust port, an air return port, an indoor port, and an outdoor port, the exhaust port is in switching communication with one of the indoor port and the outdoor port, the air return port is in switching communication with the other of the indoor port and the outdoor port, the exhaust port is connected to the exhaust port, the air return port is connected to the air return port, the indoor port is connected to the first end of the indoor heat exchanger, the outdoor port is connected to the first end of the outdoor heat exchanger, and the second refrigerant flow path is connected to the air return port.
In some embodiments of the present invention, the air conditioner further includes a first temperature detection device for detecting the cooling device, the first temperature detection device being connected to the electronic control device, the electronic control device being connected to the first throttle valve and the second throttle valve to control the opening degrees of the first throttle valve and the second throttle valve based on a detection result Tfi of the first temperature detection device.
Specifically, the detection result of the first temperature detection means has a maximum value max (tfi) and a minimum value min (tfi) for a predetermined time, wherein the opening of the first throttle valve is controlled to be open or the opening of the first throttle valve is controlled to be increased when max (tfi) > a first predetermined temperature t 1; when MAX (Tfi) > a second preset temperature t2, the first throttle valve is in an opening state, and the second throttle valve is controlled to be opened or the opening of the second throttle valve is controlled to be increased; when MAX (Tfi) > a third predetermined temperature t3, the opening degree of the first throttle valve is controlled to be maximum and the opening degree of the second throttle valve is controlled to be maximum, wherein the first predetermined temperature t1 < the second predetermined temperature t2 < the third predetermined temperature t 3.
Optionally, the air conditioner further includes a second temperature detection device for detecting a temperature in the electric control device, the second temperature detection device being connected to the electric control device, and the electric control device being connected to the first throttle valve and the second throttle valve to control the opening degrees of the first throttle valve and the second throttle valve according to a detection result Tfi of the first temperature detection device and a detection result Tqi of the second temperature detection device.
Specifically, the detection result of the first temperature detection means has a maximum value max (tfi) and a minimum value min (tfi) for the predetermined time, wherein the second throttle valve is controlled to be closed or to be reduced in opening degree when max (tfi) < the first predetermined temperature t1 and min (tfi) < max (tqi) + the first predetermined value; controlling the first throttle valve to close or decrease the opening degree when MAX (Tfi) < the first predetermined temperature t1 and MIN (Tfi) < MAX (Tqi) + a second predetermined value, the first predetermined value > the second predetermined value.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a cooling device according to some embodiments of the present invention;
FIG. 3 is a schematic cross-sectional view of the cooling device according to FIG. 2;
fig. 4 is a schematic cross-sectional view of a cooling apparatus according to other embodiments of the present invention.
Reference numerals:
an air conditioner 100; a compressor 1; an outdoor heat exchanger 2; an indoor heat exchanger 3; an outer machine throttle valve 4; an inner machine throttle valve 5; a first throttle valve 6; a second throttle valve 7; a cooling device 8; a first refrigerant passage 8 a; and a second refrigerant passage 8 b.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "inside", "outside", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
An air conditioner 100 according to an embodiment of the present invention will be described below with reference to fig. 1 to 4, and the air conditioner 100 may be used to adjust the indoor ambient temperature.
As shown in fig. 1, an air conditioner 100 according to an embodiment of the present invention may include a compressor 1, an outdoor heat exchanger 2, an indoor heat exchanger 3, an outdoor unit throttle 4, an indoor unit throttle 5, a cooling device 8 for cooling an electric control device, a first throttle 6, and a second throttle 7.
Specifically, the compressor 11 has a discharge port (not shown), a return port (not shown), and a supplement port (not shown), and refrigerant can be introduced into the compressor 11 from the return port and the supplement port, and the high-temperature and high-pressure refrigerant compressed by the compressor 11 can be discharged from the discharge port.
A first end of the outdoor heat exchanger 2 is connected to one of the discharge port and the return port, and a first end of the indoor heat exchanger 3 is connected to the other of the discharge port and the return port. That is, the first end of the outdoor heat exchanger 2 may be connected to the exhaust port and the first end of the indoor heat exchanger 3 may be connected to the return port, or the first end of the outdoor heat exchanger 2 may be connected to the return port and the first end of the indoor heat exchanger 3 may be connected to the exhaust port.
A first end of the outer machine throttle valve 4 is connected with a second end of the outdoor heat exchanger 2, and two ends of the inner machine throttle valve 5 are respectively connected with a second end of the indoor heat exchanger 3 and a second end of the outer machine throttle valve 4. For example, as shown in fig. 1, the outer throttle 4 has a throttling and depressurizing function and can reasonably distribute the refrigerant to the following circuits, and the inner throttle 5 has a throttling and depressurizing function and can reasonably distribute the refrigerant to the indoor heat exchanger 3 to regulate and control the indoor temperature.
The cooling device 8 is used for cooling the electric control device, the cooling device 8 comprises a first cooling medium flow path 8a and a second cooling medium flow path 8b, one end of the first cooling medium flow path 8a is connected with the air supplement port, and one end of the second cooling medium flow path 8b is connected with the air return port. Specifically, the cooling device 8 is connected to an electric control device, and the electric control device generates a large amount of heat and conducts the heat to the cooling device 8 when in operation, so that the temperature of the cooling device 8 can be regulated.
Specifically, the air conditioner 100 may further include an economizer, the economizer is connected to the second end of the outdoor heat exchanger 2, the refrigerant outflow end of the economizer includes a main path outlet and an auxiliary path outlet, one portion of the refrigerant flowing into the economizer is throttled to lower the temperature of the other portion in a heat expansion manner to be subcooled, the subcooled refrigerant stabilized in the portion enters the indoor heat exchanger 3 through the main path outlet of the economizer to exchange heat, and the other portion of the refrigerant not cooled flows into the air supplement port of the compressor 1 through the auxiliary path outlet of the economizer, so that the heat exchange efficiency of the air conditioner 100 may be improved.
One end of the first refrigerant flow path 8a is connected to an auxiliary outlet of the economizer, so that the refrigerant in the first refrigerant flow path 8a can enter the compressor 1 through an air supplement port of the compressor 1, and the auxiliary outlet of the economizer is medium pressure, so that the evaporating temperature is usually high, the cooling capacity is poor, and the condensation problem is not easy to occur.
Because the second throttle valve 7 has the functions of throttling and reducing pressure, the return air port of the compressor 1 is low pressure, the evaporation temperature is low, the cooling capacity is good, but the condensation problem is easy to occur. It should be noted that the high pressure, low pressure and medium pressure are described in the present invention only for describing the pressure difference at different positions, and do not indicate specific pressure values.
Both ends of the first throttle valve 6 are connected to the second end of the outer motor throttle valve 4 and the other end of the first refrigerant passage 8a, respectively. The evaporation temperature of the refrigerant in the first refrigerant flow path 8a can be controlled by adjusting the opening degree of the first throttle valve 6, so that the temperature of the cooling device 8 can be regulated and controlled, and the temperature of the electric control device can be controlled.
Both ends of the second throttle valve 7 are connected to the second end of the outer motor throttle valve 4 and the other end of the second refrigerant passage 8b, respectively. The evaporation temperature of the refrigerant in the second refrigerant flow path 8b can be controlled by adjusting the opening degree of the second throttle valve 7, so that the temperature of the cooling device 8 can be regulated and controlled, and the temperature of the electric control device can be controlled.
The first throttle 6 and the second throttle 7 may be valve bodies such as electronic expansion valves capable of adjusting flow and having throttling and pressure reducing functions.
It is understood that when the air conditioner 100 is a single-cooling air conditioner, the first end of the outdoor heat exchanger 2 is connected to the discharge port and the first end of the indoor heat exchanger 3 is connected to the return port. When the air conditioner 100 is a cooling and heating type air conditioner, the air conditioner 100 further includes a four-way valve (not shown), the four-way valve includes an exhaust port, an air return port, an indoor port and an outdoor port, the exhaust port is switched and communicated with one of the indoor port and the outdoor port, the air return port is switched and communicated with the other of the indoor port and the outdoor port, the exhaust port is connected with the exhaust port, the air return port is connected with the air return port, the indoor port is connected with the first end of the indoor heat exchanger 3, the outdoor port is connected with the first end of the outdoor heat exchanger 2, and the second refrigerant flow path 8b is connected with the air return port. Therefore, the flow direction of the refrigerant can be changed by controlling the four-way valve, and the air conditioner 100 can be switched among the cooling function, the heating function and the defrosting function.
According to the air conditioner 100 of the embodiment of the invention, the cooling device 8 comprises the first refrigerant flow path 8a and the second refrigerant flow path 8b, and the first throttle valve 6 and the second throttle valve 7 can be controlled to respectively regulate and control the evaporation temperature of the refrigerant in the first refrigerant flow path 8a and the second refrigerant flow path 8b, so that the temperature of the cooling device 8 is controlled within a proper range, the cooling requirement of the electric control device is ensured, the condensation phenomenon on the surface of the cooling device 8 is avoided, the structure of the electric control device is simplified, and the cost is reduced.
In some embodiments of the present invention, the cooling device 8 includes an inner tube positioned inside the outer tube, the inner tube defining a first refrigerant flow path 8a, and a space between an inner circumferential wall of the outer tube and an outer circumferential wall of the inner tube defining a second refrigerant flow path 8 b. For example, as shown in fig. 2 and 3, the inner pipe and the outer pipe are each formed as a U-shaped pipe, and the inner pipe is located inside the outer pipe, whereby the volume of the cooling device 8 can be reduced, which is advantageous in reducing the volume of the air conditioner 100.
In some embodiments of the present invention, the cooling device 8 is provided with two spaced flow pipes defining a first coolant flow path 8a and a second coolant flow path 8 b. For example, as shown in fig. 4, both of the flow tubes are formed as U-shaped tubes, thereby contributing to an increase in the cooling area of the cooling device 8 and thus enhancing the cooling effect.
In some embodiments of the present invention, the air conditioner 100 further includes a first temperature detecting device (not shown) for detecting the cooling device 8, the first temperature detecting device being connected to an electric control device, the electric control device being connected to the first throttle valve 6 and the second throttle valve 7 to control the opening degrees of the first throttle valve 6 and the second throttle valve 7 based on a detection result Tfi of the first temperature detecting device.
Specifically, the first temperature detection means may be a plurality of temperature sensors, for example, the first temperature detection means may be two temperature sensors, one being provided adjacent to the cooling device 8 and the other being provided adjacent to the electric control device, it being understood that the temperature sensor provided adjacent to the cooling device 8 is lower than the temperature measured by the temperature sensor provided adjacent to the electric control device, the two temperature sensors may transmit respective detection results to the electric control device, and the electric control device controls the opening degrees of the first throttle valve 6 and the second throttle valve 7 based on the detection results of the temperature sensors.
Of course, the present invention is not limited to this, and the number of the temperature sensors may also be three, four or five, and the number of the temperature sensors is determined according to actual needs.
In some embodiments of the present invention, the detection result of the first temperature detection means has a maximum value max (tfi) and a minimum value min (tfi) for a predetermined time, wherein the first throttle valve 6 is controlled to be opened or the opening degree of the first throttle valve 6 is controlled to be increased when max (tfi) > the first predetermined temperature t 1; when max (tfi) > the second predetermined temperature t2, the first throttle valve 6 is in the open state, the second throttle valve 7 is controlled to be opened or the opening of the second throttle valve 7 is controlled to be increased; when max (tfi) > the third predetermined temperature t3, the opening degree of the first throttle valve 6 and the opening degree of the second throttle valve 7 are controlled to be maximum, wherein the first predetermined temperature t1 < the second predetermined temperature t2 < the third predetermined temperature t 3.
Specifically, the first predetermined temperature t1, the second predetermined temperature t2 and the third predetermined temperature t3 may be determined according to actual needs, for example, the suitable operating temperature of the electric control device is 35 ℃ to 42 ℃, the first predetermined temperature t1, the second predetermined temperature t2 and the third predetermined temperature t3 may be set to 42 ℃, 45 ℃ and 48 ℃, respectively, and when max (tfi) is greater than 42 ℃, the first throttle valve 6 is controlled to be opened or the opening of the first throttle valve 6 is controlled to be increased; when MAX (Tfi) is higher than 45 ℃, controlling the second throttle valve 7 to be opened or controlling the opening of the second throttle valve 7 to be increased; when max (tfi) > 48 ℃, the opening degree of the first throttle valve 6 is controlled to be maximum and the opening degree of the second throttle valve 7 is controlled to be maximum. Thereby, it is ensured that the electric control device does not overheat.
Optionally, the air conditioner 100 further includes a second temperature detecting device (not shown) for detecting the temperature in the electric control device, the second temperature detecting device being connected to the electric control device, the electric control device being connected to the first throttle valve 6 and the second throttle valve 7 to control the opening degrees of the first throttle valve 6 and the second throttle valve 7 based on the detection result Tfi of the first temperature detecting device and the detection result Tqi of the second temperature detecting device.
In other words, the second temperature detection device is used for detecting the temperature of the air in the cavity where the electric control device is located, the second temperature detection device can transmit the detection result to the electric control device, and the electric control device can control the opening degrees of the first throttle valve 6 and the second throttle valve 7 according to the detection result Tfi of the first temperature detection device and the detection result Tqi of the second temperature detection device. Wherein, the second temperature detection device can be one or more temperature sensors.
Specifically, the detection result of the first temperature detection means has a maximum value max (tfi) and a minimum value min (tfi) for a predetermined time, wherein the second throttle valve 7 is controlled to close or decrease the opening degree when max (tfi) < the first predetermined temperature t1 and min (tfi) < max (tqi) + the first predetermined value; when max (tfi) < the first predetermined temperature t1 and min (tfi) < max (tqi) + the second predetermined value, the first throttle valve 6 is controlled to be closed or to be reduced in opening amount, the first predetermined value > the second predetermined value.
Wherein, the first predetermined value and the second predetermined value can be selected according to actual conditions. For example, the first predetermined value and the second predetermined value may be between 3 ℃ and 5 ℃, so that the temperature of the cooling device 8 can be ensured not to be lower than the temperature of the air in the cavity where the electric control device is located by controlling the opening degrees of the first throttle valve 6 and the second throttle valve 7 through the electric control device, and the condensation phenomenon is further avoided.
The detailed structure and operation of the air conditioner 100 according to the embodiment of the present invention will be described in detail with reference to fig. 1 to 3. It is to be understood, of course, that the following description is intended to illustrate the invention and not to limit the invention.
As shown in fig. 1 to 3, an air conditioner 100 according to an embodiment of the present invention includes a compressor 1, an outdoor heat exchanger 2, an indoor heat exchanger 3, an outdoor unit throttle 4, an indoor unit throttle 5, a cooling device 8 for cooling an electric control device, an economizer, a first throttle 6, and a second throttle 7.
Specifically, the compressor 11 has an exhaust port, a return port, and an air supply port, and the refrigerant can enter the compressor 11 through the return port and the air supply port, and the high-temperature and high-pressure refrigerant compressed by the compressor 11 can be discharged from the exhaust port.
The first end of the outdoor heat exchanger 2 is connected with the exhaust port, and the first end of the indoor heat exchanger 3 is connected with the return air port.
A first end of the outer machine throttle valve 4 is connected with a second end of the outdoor heat exchanger 2, and two ends of the inner machine throttle valve 5 are respectively connected with a second end of the indoor heat exchanger 3 and a second end of the outer machine throttle valve 4.
The cooling device 8 for cooling the electric control device includes a first refrigerant flow path 8a and a second refrigerant flow path 8b, one end of the first refrigerant flow path 8a is connected to the air supply port, and one end of the second refrigerant flow path 8b is connected to the return port.
The economizer is connected with the second end of the outdoor heat exchanger 2, the refrigerant outflow end of the economizer comprises a main path outlet and an auxiliary path outlet, one end of the first refrigerant flow path 8a is connected into the auxiliary path outlet of the economizer and enters the compressor 1 through the air supplement port of the compressor 1, and the evaporation temperature of the economizer is usually high and the cooling capacity is poor due to the fact that the auxiliary path outlet of the economizer corresponds to the medium pressure in the system, and the condensation problem is not prone to occurring.
The return air port of the compressor 1 corresponds to the low pressure in the refrigerant system, the evaporation temperature is low, the cooling capacity is good, but the condensation problem is easy to occur.
As shown in fig. 1, both ends of the first throttle 6 are connected to the second end of the outer unit throttle 4 and the other end of the first refrigerant flow path 8a, respectively, and both ends of the second throttle 7 are connected to the second end of the outer unit throttle 4 and the other end of the second refrigerant flow path 8b, respectively.
The air conditioner 100 further includes a first temperature detecting device for detecting the cooling device 8, the first temperature detecting device being connected to an electric control device, the electric control device being connected to the first throttle valve 6 and the second throttle valve 7 to control the opening degrees of the first throttle valve 6 and the second throttle valve 7 based on a detection result Tfi of the first temperature detecting device.
The first temperature detection means are in particular two temperature sensors, one arranged adjacent to the cooling means 8 and the other adjacent to the electronic control means.
The detection result of the first temperature detection means has a maximum value max (tfi) and a minimum value min (tfi) for a predetermined time, wherein the first throttle valve 6 is controlled to be opened or the opening degree of the first throttle valve 6 is controlled to be increased when max (tfi) > the first predetermined temperature t 1; when max (tfi) > the second predetermined temperature t2, the first throttle valve 6 is in the open state, the second throttle valve 7 is controlled to be opened or the opening of the second throttle valve 7 is controlled to be increased; when max (tfi) > the third predetermined temperature t3, the opening degree of the first throttle valve 6 and the opening degree of the second throttle valve 7 are controlled to be maximum, wherein the first predetermined temperature t1 < the second predetermined temperature t2 < the third predetermined temperature t 3. This ensures that the electrical control device does not overheat.
The air conditioner 100 further includes a second temperature detecting device for detecting the temperature in the electric control device, the second temperature detecting device being connected to the electric control device, the electric control device being connected to the first throttle valve 6 and the second throttle valve 7 to control the opening degrees of the first throttle valve 6 and the second throttle valve 7 based on the detection result Tfi of the first temperature detecting device and the detection result Tqi of the second temperature detecting device.
The detection result of the first temperature detection means has a maximum value max (tfi) and a minimum value min (tfi) for a predetermined time, wherein the second throttle valve 7 is controlled to close or decrease the opening degree when max (tfi) < the first predetermined temperature t1 and min (tfi) < max (tqi) + the first predetermined value; when max (tfi) < the first predetermined temperature t1 and min (tfi) < max (tqi) + the second predetermined value, the first throttle valve 6 is controlled to be closed or to be reduced in opening amount, the first predetermined value > the second predetermined value. Therefore, the opening degree of the first throttle valve 6 and the second throttle valve 7 is controlled by the electric control device, so that the temperature of the cooling device 8 is not lower than the temperature of air in a cavity where the electric control device is located, and the condensation phenomenon is further avoided.
Other configurations and operations of the air conditioner 100 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.
In the description herein, references to the description of "some embodiments" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (6)
1. An air conditioner, comprising:
a compressor having a discharge port, a return port, and a make-up port;
the first end of the outdoor heat exchanger is connected with one of the air exhaust port and the air return port, and the first end of the indoor heat exchanger is connected with the other one of the air exhaust port and the air return port;
the first end of the outer machine throttle valve is connected with the second end of the outdoor heat exchanger, and the two ends of the inner machine throttle valve are respectively connected with the second end of the indoor heat exchanger and the second end of the outer machine throttle valve;
the cooling device is used for cooling the electric control device and comprises a first refrigerant flow path and a second refrigerant flow path, one end of the first refrigerant flow path is connected with the air supplementing port, and one end of the second refrigerant flow path is connected with the air returning port;
the two ends of the first throttle valve are respectively connected with the second end of the outer machine throttle valve and the other end of the first refrigerant flow path;
two ends of the second throttle valve are respectively connected with the second end of the outer machine throttle valve and the other end of the second refrigerant flow path;
a first temperature detection device for detecting the cooling device, the first temperature detection device being connected to the electric control device, the electric control device being connected to the first throttle valve and the second throttle valve to control the opening degrees of the first throttle valve and the second throttle valve based on a detection result Tfi of the first temperature detection device,
the detection result of the first temperature detection means has a maximum value max (tfi) and a minimum value min (tfi) for a predetermined time, wherein,
controlling the first throttle valve to open or controlling the opening of the first throttle valve to increase when MAX (Tfi) > a first predetermined temperature t 1;
when MAX (Tfi) > a second preset temperature t2, the first throttle valve is in an opening state, and the second throttle valve is controlled to be opened or the opening of the second throttle valve is controlled to be increased;
when MAX (Tfi) > a third predetermined temperature t3, the opening degree of the first throttle valve is controlled to be maximum and the opening degree of the second throttle valve is controlled to be maximum, wherein the first predetermined temperature t1 < the second predetermined temperature t2 < the third predetermined temperature t 3.
2. The air conditioner according to claim 1, wherein the cooling device includes an inner pipe and an outer pipe, the inner pipe is located inside the outer pipe, the inner pipe defines the first refrigerant flow path, and a space between an inner circumferential wall of the outer pipe and an outer circumferential wall of the inner pipe defines the second refrigerant flow path.
3. The air conditioner according to claim 1, wherein the cooling device is provided with two flow pipes spaced apart from each other, and the two flow pipes define the first refrigerant flow path and the second refrigerant flow path.
4. The air conditioner according to claim 1, further comprising a four-way valve, wherein the four-way valve comprises an exhaust port, an air return port, an indoor port and an outdoor port, the exhaust port is in switching communication with one of the indoor port and the outdoor port, the air return port is in switching communication with the other of the indoor port and the outdoor port, the exhaust port is connected to the exhaust port, the air return port is connected to the air return port, the indoor port is connected to the first end of the indoor heat exchanger, the outdoor port is connected to the first end of the outdoor heat exchanger, and the second refrigerant flow path is connected to the air return port.
5. The air conditioner as claimed in claim 1, further comprising a second temperature detecting means for detecting a temperature in the electric control means, the second temperature detecting means being connected to the electric control means, the electric control means being connected to the first throttle valve and the second throttle valve to control the opening degrees of the first throttle valve and the second throttle valve based on a detection result Tfi of the first temperature detecting means and a detection result Tqi of the second temperature detecting means.
6. The air conditioner as claimed in claim 5, wherein the detection result of the first temperature detecting means has a maximum value MAX (Tfi) and a minimum value MIN (Tfi) for the predetermined time, wherein
Controlling the second throttle valve to close or decrease the opening degree when MAX (Tfi) < the first predetermined temperature t1 and MIN (Tfi) < MAX (Tqi) + the first predetermined value;
controlling the first throttle valve to close or decrease the opening degree when MAX (Tfi) < the first predetermined temperature t1 and MIN (Tfi) < MAX (Tqi) + a second predetermined value, the first predetermined value > the second predetermined value.
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| CN201710946019.9A CN107726475B (en) | 2017-10-12 | 2017-10-12 | Air conditioner |
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| CN109195414B (en) * | 2018-10-17 | 2024-03-19 | 珠海格力电器股份有限公司 | Air conditioner, electric box and electric box radiator |
| CN109341131A (en) * | 2018-11-13 | 2019-02-15 | 珠海格力电器股份有限公司 | Air conditioner and temperature control method of electric controller of air conditioner |
| CN110410878B (en) * | 2019-08-26 | 2020-07-14 | 珠海格力电器股份有限公司 | Air conditioning system and cooling method |
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