CN211625627U - Air conditioner outdoor unit and air conditioner - Google Patents
Air conditioner outdoor unit and air conditioner Download PDFInfo
- Publication number
- CN211625627U CN211625627U CN202020043404.XU CN202020043404U CN211625627U CN 211625627 U CN211625627 U CN 211625627U CN 202020043404 U CN202020043404 U CN 202020043404U CN 211625627 U CN211625627 U CN 211625627U
- Authority
- CN
- China
- Prior art keywords
- pressure
- air conditioner
- refrigerant
- valve
- interface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- 239000003507 refrigerant Substances 0.000 claims abstract description 105
- 238000001514 detection method Methods 0.000 claims abstract description 44
- 238000010438 heat treatment Methods 0.000 claims description 21
- 238000001816 cooling Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 abstract description 54
- 238000000926 separation method Methods 0.000 abstract description 11
- 238000009530 blood pressure measurement Methods 0.000 abstract description 5
- 238000010977 unit operation Methods 0.000 abstract description 5
- 238000005057 refrigeration Methods 0.000 description 14
- 239000003921 oil Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 10
- 238000011084 recovery Methods 0.000 description 9
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 7
- 229910052731 fluorine Inorganic materials 0.000 description 7
- 239000011737 fluorine Substances 0.000 description 7
- 230000009467 reduction Effects 0.000 description 6
- 238000004378 air conditioning Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 210000003437 trachea Anatomy 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- UUDAMDVQRQNNHZ-UHFFFAOYSA-N (S)-AMPA Chemical compound CC=1ONC(=O)C=1CC(N)C(O)=O UUDAMDVQRQNNHZ-UHFFFAOYSA-N 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010726 refrigerant oil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
The utility model discloses an outer machine of air conditioner and air conditioner. Wherein, this outer machine of air conditioner includes: the air conditioner comprises a first interface and a second interface which are used for being connected with an air conditioner indoor unit; and one end of the pressure detection device is connected to the first interface, and the other end of the pressure detection device is connected to the second interface, and the pressure detection device is used for detecting the pressure of the refrigerant flowing out of the air conditioner external unit and bypassing the refrigerant when the air conditioner runs. The utility model discloses set up the pressure measurement device between the first interface and the second interface of outer machine, detect the refrigerant pressure that outer machine flows out, accurate feedback piping pressure, take measures to control operating pressure in the piping pressure-bearing scope, avoid updating the air conditioner but not change the piping new refrigerant operating pressure surpass former piping pressure-bearing scope, improve unit operation security and stability; when the air conditioner operates with liquid, the low-temperature liquid refrigerant can be bypassed to the compressor by using the pressure detection device, and enters the compressor after gas-liquid separation to cool the compressor, so that the high-temperature burning-out caused by fluorine-lacking operation of the compressor is avoided.
Description
Technical Field
The utility model relates to an air conditioner technical field particularly, relates to an outer machine of air conditioner and air conditioner.
Background
Commercial multi-split air conditioner has been developed so far, and the previous generation of R22 (refrigerant, also called refrigerant) multi-split air conditioner has been put into use for more than ten years, and many problems have been highlighted. At present, the market has great R22 multi-online updating requirement.
Since the piping of the multi-split air conditioning system is complicated, if the piping system is replaced, the built-in structure of the owner needs to be destroyed, and the amount of work is large and the cost is high. If the piping system is reserved, only the unit is replaced, the pressure during the operation of R410A (novel refrigerant) is higher than that during the operation of R22, the original piping meets the pressure-bearing requirement during the operation of R22 refrigerant, and after the R410A refrigerant system is replaced, the pressure-bearing capacity of the original piping cannot meet the normal R410A refrigerant system. Therefore, for updating the multi-split air-conditioning system, the refrigerant pressure in the original pipe must be controlled within the operating pressure range of the R22 refrigerant system so as to meet the requirement of not replacing the connecting pipe.
At present, most of multi-split air conditioning units are arranged at the outlet of a compressor, are far away from a connecting pipe, and cannot accurately feed back the pressure of an original pipe, so that the pipe pressure of the updated multi-split air conditioning units cannot be effectively monitored, and the unit performance is difficult to normally exert during refrigeration/heating.
Aiming at the problem that the operation is influenced because the operation pressure of a new refrigerant exceeds the pressure-bearing range of an original pipe when an air conditioner is updated in the prior art, an effective solution is not provided at present.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an outer machine of air conditioner and air conditioner to the operating pressure of new refrigerant surpasss former piping pressure-bearing scope and influences the problem of operation when solving among the prior art air conditioner update.
In order to solve the technical problem, an embodiment of the utility model provides an outer machine of air conditioner, including being used for the first interface and the second interface of being connected with the air conditioner inner machine, still include: and one end of the pressure detection device is connected to the first interface, the other end of the pressure detection device is connected to the second interface, and the pressure detection device is used for detecting the pressure of the refrigerant flowing out of the air conditioner external unit and bypassing the refrigerant when the air conditioner runs.
Optionally, the pressure detection device includes: the pressure sensor is connected with the valve; and the pressure sensor is used for detecting the pressure of the refrigerant flowing out of the air conditioner external unit under different operation modes according to the opening and closing conditions of the valve.
Optionally, the pressure detection device is specifically configured to bypass the refrigerant through the valve in an open state when the air conditioner is in operation.
Optionally, the valve comprises: the first valve is connected to the first interface at one end, and is connected to the pressure sensor at the other end, and is used for opening in a cooling mode and closing in a heating mode; and one end of the second valve is connected to the second interface, and the other end of the second valve is connected to the pressure sensor and used for being closed in the cooling mode and being opened in the heating mode.
Optionally, the first valve is: one-way valves, solenoid valves or electronic expansion valves; and/or, the second valve is: a check valve, a solenoid valve, or an electronic expansion valve.
Optionally, the air conditioner outdoor unit further includes: and the first pressure switch is arranged at the first interface and is used for switching off when the refrigerant pressure is detected to reach a first preset pressure.
Optionally, the air conditioner outdoor unit further includes: and the second pressure switch is arranged at the second interface and is used for switching off when the refrigerant pressure is detected to reach a second preset pressure.
The embodiment of the utility model provides an air conditioner is still provided, include: the embodiment of the utility model provides an air conditioner outer machine.
Optionally, the air conditioner further includes: and the controller is used for controlling the air conditioner to operate according to the current operation mode and pressure data detected by the pressure detection device in the air conditioner external unit, and controlling the pressure detection device to bypass a refrigerant when the air conditioner operates.
Use the technical scheme of the utility model, set up pressure measurement device between the first interface of the outer machine of air conditioner and second interface, a pressure for detecting the refrigerant that flows from the outer machine of air conditioner, can accurate feedback piping pressure, and then take appropriate control measure, with operating pressure control in piping pressure-bearing range, with the new refrigerant operating pressure of the condition of avoiding updating the air conditioner nevertheless not changing the piping surpass the problem that former piping pressure-bearing range influences the unit operation, improve the security and the stability of unit operation. Meanwhile, when the air conditioner runs with liquid to clean and recover old refrigerating oil, the low-temperature liquid refrigerant can be bypassed to the compressor by the pressure detection device and enters the compressor after gas-liquid separation to cool the compressor, so that the problem that a large amount of refrigerant accumulates in the refrigerating oil recovery device during the running with liquid to cause the compressor to run short of fluorine and burn out at high temperature is avoided.
Drawings
Fig. 1 is a schematic structural diagram of an air conditioner external unit according to a first embodiment of the present invention;
fig. 2 is another schematic structural diagram of an air conditioner external unit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an air conditioner according to a second embodiment of the present invention;
fig. 4 is a flowchart of an air conditioner control method according to a third embodiment of the present invention;
description of reference numerals:
1 a first interface, 2 a second interface, 3 other devices, 4 a pressure detection device, 41 valves, 411 first valves, 412 second valves, 42 pressure sensors, 51 first pressure switches, 52 second pressure switches, 31 compressors, 32 four-way valves, 33 outdoor heat exchangers, 34 heating electronic expansion valves, 35 subcoolers (plate heat exchangers), 36 subcooled electronic expansion valves, 37 gas-liquid separators, 38 low pressure sensors, an outdoor unit A and an indoor unit B.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example one
The embodiment provides an air conditioner outdoor unit, which is suitable for the situation that only a unit is replaced and the air conditioner of an original distribution system is kept to be updated, for example, multi-split air conditioner updating. The pressure of the distribution pipe (namely the pressure of the refrigerant in the pipeline) can be fed back accurately, so that the unit is controlled based on the pressure, and the phenomenon that the operation pressure of the new refrigerant exceeds the pressure bearing range of the original distribution pipe to influence the operation of the unit is avoided.
Fig. 1 is the utility model provides a structural schematic diagram of outer machine of air conditioner, as shown in fig. 1, outer machine of air conditioner includes: the system comprises a first interface 1, a second interface 2, other devices 3 (namely common devices arranged in an outdoor unit, such as a compressor, an outdoor heat exchanger, a four-way valve and the like) and a pressure detection device 4. The first interface 1 and the second interface 2 are used for being connected with an air conditioner indoor unit. The pipeline where the first connector 1 and the second connector 2 are located is a connecting pipe of an internal machine and an external machine.
One end of the pressure detection device 4 is connected to the first interface 1 of the air conditioner external unit, and the other end is connected to the second interface 2 of the air conditioner external unit, and the pressure detection device is used for detecting the pressure of the refrigerant flowing out of the air conditioner external unit and bypassing the refrigerant when the air conditioner runs.
First interface and second interface are located liquid pipe and trachea respectively, and is exemplary, and first interface is located liquid pipe, and the second interface is located the trachea, and under the refrigeration mode, the inlet tube is gone into after compressor exhaust refrigerant gets into outdoor heat exchanger condensation, flows into the air conditioner internal unit through first interface, and the refrigerant gets into the indoor heat exchanger evaporation back, gets into the trachea through the second interface, gets back to the compressor. In the heating mode, a refrigerant discharged by the compressor enters the air pipe, flows into the air conditioner internal unit through the second interface, enters the liquid inlet pipe through the first interface after entering the indoor heat exchanger for condensation, then enters the outdoor heat exchanger for evaporation and then returns to the compressor.
Specifically, the refrigerant on the liquid pipe or the air pipe can be bypassed by using the pressure detection device when the air conditioner is operated. For example, when the air conditioner is operated with liquid, the liquid refrigerant is bypassed to the gas-liquid separator, and the gas refrigerant obtained by gas-liquid separation is sent to the compressor. The liquid-carrying operation refers to the condition that liquid refrigerants exist at the air suction end of the compressor in the operation process of the air conditioning unit. When the air conditioner runs with liquid to clean and recover old refrigerating oil, the pressure detection device is utilized to bypass low-temperature liquid refrigerant to the compressor, the refrigerant enters the compressor after gas-liquid separation to cool the compressor, and therefore the problem that a large amount of refrigerant accumulates in the refrigerating oil recovery device during the running with liquid to cause the compressor to run short of fluorine and burn out at high temperature is avoided.
The pressure detection device is arranged between the first interface and the second interface of the air conditioner outdoor unit, and is used for detecting the pressure of the refrigerant flowing out of the air conditioner outdoor unit, the pressure of the distribution pipe can be fed back accurately, appropriate control measures are taken, the operation pressure is controlled within the distribution pipe pressure-bearing range, the problem that the operation of the unit is influenced by the fact that the operation pressure of the new refrigerant exceeds the original distribution pipe pressure-bearing range under the condition that the air conditioner is updated but the distribution pipe is not replaced is avoided, and the safety and the stability of the operation of the unit are improved. Meanwhile, when the air conditioner runs with liquid to clean and recover old refrigerating oil, the low-temperature liquid refrigerant is bypassed to the compressor by the pressure detection device and enters the compressor after gas-liquid separation to cool the compressor, so that the problem that the compressor runs at a high temperature due to fluorine deficiency caused by the fact that a large amount of refrigerant is accumulated in the refrigerating oil recovery device during the running with liquid is avoided.
Specifically, the pressure detection device 4 includes: a valve 41 and a pressure sensor 42 connected to the valve 41. And a pressure sensor 42 for detecting the pressure of the refrigerant flowing out of the air conditioner outdoor unit in different operation modes according to the opening and closing conditions of the valve 41. The valve is opened and closed to allow the refrigerant to flow to the pressure sensor to detect the pressure.
In one embodiment, the valve 41 includes: a first valve 411 having one end connected to the first port 1 and the other end connected to the pressure sensor 42, and configured to open in the cooling mode and close in the heating mode; the second valve 412 is connected to the second port 2 at one end and to the pressure sensor 42 at the other end, and is configured to be closed in the cooling mode and opened in the heating mode.
Through the cooperation of first valve and second valve for the refrigerant gets into pressure measurement through first valve under the refrigeration mode and nevertheless can't flow out through the second valve, and, the refrigerant gets into pressure measurement through the second valve under the heating mode and nevertheless can't flow out through first valve, thereby pressure sensor detects the pressure of the refrigerant that flows from first interface under the refrigeration mode, and detect the pressure of the refrigerant that flows from the second interface under the heating mode, has realized the detection of corresponding pressure.
Specifically, the first valve may be: a check valve, a solenoid valve or an electronic expansion valve, and the second valve may be: a check valve, a solenoid valve, or an electronic expansion valve. It should be noted that, if a check valve is used, attention needs to be paid to the conduction direction of the check valve, for example, if the first valve is a check valve, the conduction direction is the direction in which the first port conducts to the second port, otherwise, pressure detection cannot be achieved, and similarly, if the second valve is a check valve, the conduction direction is the direction in which the second port conducts to the first port.
As shown in fig. 2, the outdoor unit of an air conditioner may further include: the first pressure switch 51 is installed at the first port 1, and is turned off when it is detected that the refrigerant pressure reaches a first preset pressure. The first preset pressure refers to an action threshold of the first pressure switch, that is, when a pressure value detected by the first pressure switch reaches the first preset pressure, the first pressure switch is turned off. The first preset pressure may be specifically set according to the pressure bearing capacity of the original pipe, for example, if the maximum pressure bearing capacity of the original pipe is 3.2MPa, the first preset pressure may be set to 3.2 MPa. Specifically, the first pressure switch 51 may be installed at a first interface between the internal unit and the external unit, or may be installed at a position near the first interface between the internal unit and the external unit.
The outdoor unit of air conditioner may further include: and a second pressure switch 52 installed at the second port 2, for being turned off when it is detected that the refrigerant pressure reaches a second preset pressure. The second preset pressure refers to an action threshold of the second pressure switch, that is, when a pressure value detected by the second pressure switch reaches the second preset pressure, the second pressure switch is turned off. The second preset pressure may be specifically set according to the pressure bearing capacity of the original pipe, for example, the maximum pressure bearing capacity of the original pipe is 3.2MPa, and the second preset pressure may be set to 3.2 MPa. Specifically, the second pressure switch 52 may be installed at the second interface between the inner unit and the outer unit, or may be installed at a position near the second interface between the inner unit and the outer unit.
Through setting up first pressure switch and second pressure switch, when arbitrary pressure switch disconnection, the unit stop operation, get into shutdown protection, pressure switch and the above-mentioned control based on pressure detection device detection goes on the unit, has realized duplicate protection like this.
The pressure detection device is specifically used for bypassing the refrigerant through the valve in the open state when the air conditioner operates, for example, when the air conditioner operates with liquid, the liquid refrigerant is bypassed to the gas-liquid separator through the valve in the open state, and the gas refrigerant obtained by gas-liquid separation is conveyed to the compressor. Specifically, when the air conditioner operates with liquid, the first valve and the second valve are both opened, so that the whole pipeline of the pressure detection device can circulate the refrigerant, low-temperature liquid refrigerant is bypassed to the gas-liquid separator, and low-temperature gaseous refrigerant obtained by gas-liquid separation is conveyed to the compressor to cool the compressor.
When the unit is renewed, since the piping is not replaced, it is necessary to clean and recover the refrigerant oil and impurities of the R22 system remaining in the piping so as not to affect the operation of the new R410 system. Generally, a recovery device can be arranged between an air pipe and a compressor of the unit, and the recovery of the refrigeration oil is realized through the liquid-carrying operation of the unit. In the process of recovering the refrigeration oil, the unit operates with liquid, a large amount of refrigerant can be accumulated in the recovery device, and the high-temperature burnout caused by the fluorine-deficient operation of the compressor can occur. The pipeline at above-mentioned pressure measurement device place can feed through the liquid pipe and the trachea of unit in fact, through the reasonable setting of valve (for example, open first valve and second valve simultaneously), in the refrigeration oil recovery in-process, can utilize the low temperature refrigerant that this pipeline produced in with outer machine to carry to compressor department when refrigerating, enters the compressor after gas-liquid separation, gives the compressor cooling, avoids the compressor to lack fluorine operation and leads to high temperature to burn out. In addition, a throttling device, such as a capillary tube, can be arranged on the pipeline where the pressure detection device is located, and when the refrigeration oil is recovered, throttling decompression is carried out, and the flow of the refrigerant is controlled.
Example two
On the basis of the first embodiment, the present embodiment provides an air conditioner, including: the air conditioner outdoor unit according to the first embodiment.
The above air conditioner may further include: and the controller is used for controlling the air conditioner to operate according to the current operation mode and pressure data detected by the pressure detection device in the air conditioner external unit, and controlling the pressure detection device to bypass the refrigerant when the air conditioner operates.
In the embodiment, the pressure detection device arranged between the first interface and the second interface of the air conditioner outdoor unit is used for detecting the pressure of the refrigerant flowing out of the air conditioner outdoor unit, the pressure of the distribution pipe can be fed back accurately, appropriate control measures are taken, the operation pressure is controlled within the pressure bearing range of the distribution pipe, the problem that the operation of the unit is influenced by the fact that the operation pressure of the new refrigerant exceeds the pressure bearing range of the original distribution pipe under the condition that the air conditioner is updated but the distribution pipe is not replaced is solved, and the safety and the stability of the operation of the unit are improved. Meanwhile, when the air conditioner runs with liquid to clean and recover old refrigerating oil, the low-temperature liquid refrigerant is bypassed to the compressor by the pressure detection device and enters the compressor after gas-liquid separation to cool the compressor, so that the problem that the compressor runs at a high temperature due to fluorine deficiency caused by the fact that a large amount of refrigerant is accumulated in the refrigerating oil recovery device during the running with liquid is avoided.
Referring to fig. 3, the first valve 411 is a one-way valve and the second valve 412 is an electromagnetic valve for illustration, however, it should be noted that this embodiment is only for better illustration of the present application and should not be construed as a limitation of the present application.
Under the refrigeration mode, the flow direction of the related refrigerant of the pressure detection is as follows: 31 → 32 → 33 → 34 → 35 → 411 → 42, the second valve 412 is closed, and the refrigerant cannot flow to the air pipe, so the pressure sensor 42 can detect the pressure of the refrigerant flowing out of the outdoor unit, that is, the pressure of the refrigerant in the liquid pipe.
In the heating mode, the flow direction of the refrigerant related to pressure detection is as follows: 31 → 32 → 412 → 42, the first valve 411 is closed, and the refrigerant cannot flow to the liquid pipe, so the pressure sensor 42 can detect the pressure of the refrigerant in the gas pipe.
As can be seen, the pressure sensor 42 serves as a medium pressure sensor during cooling, and detects the refrigerant pressure of the outdoor unit; the high pressure sensor is used for detecting the pressure of the refrigerant on the high pressure side during heating. The low pressure sensor 38 detects the evaporation pressure of the refrigerant in both the cooling mode and the heating mode.
The first pressure switch 51 is located at the liquid pipe, and the second pressure switch 52 is located at the air pipe, and is specifically arranged at the refrigerant outlet position of the external machine. The action threshold value of the pressure switch is set according to the pressure bearing capacity of the original pipe. When the pressure of the refrigerant passing through the first pressure switch or the second pressure switch reaches the corresponding switch action threshold value, the unit stops running, the dual-protection effect is achieved, and the unit runs more safely.
In addition, in fig. 3, when the air conditioner operates with liquid, the first valve 411 and the second valve 412 are opened, so that the refrigerant can flow through the pipeline of the pressure detection device 4, and the low-temperature liquid refrigerant bypasses the gas-liquid separator to perform gas-liquid separation, and then enters the compressor to cool.
EXAMPLE III
The present embodiment provides an air conditioner control method, which can be applied to the outdoor unit of the air conditioner in the first embodiment or the air conditioner in the second embodiment.
Fig. 4 is a flowchart of an air conditioner control method provided by the third embodiment of the present invention, and as shown in fig. 4, the method includes:
s401, determining the current operation mode of the air conditioner.
And S402, detecting pressure data of the refrigerant flowing out of the air conditioner external unit according to the current operation mode.
And S403, controlling the air conditioner to operate according to the current operation mode and the pressure data.
The embodiment detects the pressure data of the refrigerant flowing out of the air conditioner external unit according to the current operation mode, then controls the unit operation by combining the current operation mode and the pressure data, and can control the operation pressure of the refrigerant within the pressure bearing range of the distribution pipe, so that the problem that the operation of the unit is influenced by the fact that the operation pressure of a new refrigerant exceeds the pressure bearing range of the original distribution pipe under the condition that the air conditioner is updated but the distribution pipe is not replaced is avoided, and the safety and the stability of the unit operation are improved.
In one embodiment, the method for detecting pressure data of a refrigerant flowing out of an air conditioner outdoor unit according to a current operation mode includes: if the current operation mode is a refrigeration mode, opening the first valve, closing the second valve, and detecting the pressure of the refrigerant flowing out of the first interface of the air conditioner external unit through the pressure sensor; and if the current operation mode is the heating mode, closing the first valve, opening the second valve, and detecting the pressure of the refrigerant flowing out of the second interface of the air conditioner external unit through the pressure sensor.
In the present embodiment, during cooling, the pressure sensor serves as a medium-pressure sensor to detect the refrigerant pressure of the outdoor unit; during heating, the pressure sensor serves as a high-pressure sensor to detect the pressure of the refrigerant on the high-pressure side. The pressure detection of the refrigerant output by the external unit in different modes is realized by utilizing the opening and closing conditions of the valve, the pressure of the distribution pipe can be accurately fed back, and the follow-up control based on the pressure is guaranteed.
In one embodiment, controlling the operation of the air conditioner according to the current operation mode and the pressure data includes:
if the current operation mode is a refrigeration mode, controlling the air conditioner to normally operate when the pressure data is smaller than a first threshold value; when the pressure data is greater than or equal to a first threshold and smaller than a second threshold, controlling the air conditioner to operate in a frequency-limited mode; when the pressure data is greater than or equal to the second threshold and smaller than a third threshold, controlling the air conditioner to perform frequency reduction operation; when the pressure data is greater than or equal to a third threshold value, controlling the air conditioner to stop;
if the current operation mode is the heating mode, controlling the air conditioner to normally operate when the pressure data is smaller than a fourth threshold value; when the pressure data is greater than or equal to a fourth threshold and smaller than a fifth threshold, controlling the air conditioner to operate in a frequency limiting mode; when the pressure data is greater than or equal to a fifth threshold and smaller than a sixth threshold, controlling the air conditioner to perform frequency reduction operation; and when the pressure data is greater than or equal to the sixth threshold value, controlling the air conditioner to stop.
The first threshold, the second threshold and the third threshold are increased in sequence, and the fourth threshold, the fifth threshold and the sixth threshold are increased in sequence. The first threshold value to the sixth threshold value may be set according to the maximum bearing pressure of the original pipe, and there is no inevitable size relationship between the threshold values in different modes. How to control the air conditioner under the condition equal to the threshold value can be set according to actual requirements, and the above is only an example. Normal operation means that the compressor frequency can be changed according to the requirement, namely, the output is carried out according to the normal capacity; the frequency-limiting operation means limiting the frequency rising of the compressor, even if the demand is increased, the compressor is maintained to operate in a certain frequency range, and the frequency rising is not allowed, namely capacity output is limited so as to avoid the continuous rising of the current pressure; the reduced frequency operation refers to a reduction in compressor frequency, i.e., a reduction in capacity output, resulting in a currently greater pressure drop. Under the refrigeration mode or the heating mode, a plurality of thresholds are set to control in a layered mode, advanced control can be achieved, the running state of the air conditioner can be changed in time, and the pressure of the piping is prevented from exceeding the pressure bearing range.
In addition, if the pressure switch is provided, after determining the current operation mode of the air conditioner, the method further includes: in the refrigeration mode, if the first pressure switch is disconnected, the air conditioner is controlled to stop; and in the heating mode, if the second pressure switch is switched off, the air conditioner is controlled to stop. And a pressure switch is arranged, and the pressure switch is combined with the pressure detection and the control thereof, so that double protection is provided for the safe and reliable operation of the unit.
The air conditioner control method will be described below with reference to the air conditioner shown in fig. 3.
During the cooling operation, the high-temperature and high-pressure refrigerant discharged from the compressor 31 enters the liquid inlet pipe through the four-way valve 32 and the outdoor heat exchanger 33, flows into the first valve 411, the second valve 412 is closed, the pressure sensor 42 serves as a medium-pressure sensor, and detects the pressure value of the refrigerant entering the connecting pipe from the outdoor unit, and the pressure value is used for adjusting the operation of the unit. Specifically, when the pressure is less than zMPa, the unit outputs according to the normal capacity; when the pressure belongs to [ z, y ], the unit limits the capacity output; when the pressure belongs to [ y, x ], the capacity reduction of the unit is output; when the pressure is within the range of x and +/-infinity), the unit is protected and shut down. Or when the first pressure switch 51 is operated, the protection is stopped.
When heating, the high-temperature and high-pressure refrigerant discharged from the compressor 31 enters the air pipe through the four-way valve 32, the second valve 412 is opened, the refrigerant cannot pass through the liquid pipe because the first valve 411 is a one-way valve, and the pressure sensor 42 is used as a high-pressure sensor to collect the pressure of the refrigerant on the high-pressure side. The data collected by the pressure sensor 42 will be used as a basis for the operation of the unit. Specifically, when the pressure is less than aMPa, the unit outputs according to the normal capacity; when the pressure belongs to [ a, b ], the unit limits the capacity output; when the pressure belongs to [ b, c), the capacity reduction of the unit is output; when the pressure ∈ [ c, + ∞), the protection is shut down. Or the second pressure switch 52 is activated, the protection is stopped.
Therefore, the running state of the unit can be adjusted in real time according to the pressure data detected by the pressure sensor in the refrigerating mode and the heating mode, the system can run safely and reliably, and the double protection effect is provided by the pressure switch.
In addition, when the air conditioner operates with liquid, the first valve and the second valve can be opened, the bypass function of the pressure detection device is realized, the liquid refrigerant is bypassed to the gas-liquid separator by the pressure detection device, the gas refrigerant obtained by gas-liquid separation is conveyed to the compressor, and the temperature of the compressor is reduced, so that the problem that a large amount of refrigerant is accumulated in the refrigeration oil recovery device during the operation with liquid to cause the operation of the compressor lacking fluorine and burn out at high temperature is avoided.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The utility model provides an outer machine of air conditioner, includes first interface and the second interface that is used for being connected with the air conditioner internal unit, its characterized in that, outer machine of air conditioner still includes:
and one end of the pressure detection device is connected to the first interface, the other end of the pressure detection device is connected to the second interface, and the pressure detection device is used for detecting the pressure of the refrigerant flowing out of the air conditioner external unit and bypassing the refrigerant when the air conditioner runs.
2. The outdoor unit of claim 1, wherein the pressure detecting means comprises: the pressure sensor is connected with the valve;
and the pressure sensor is used for detecting the pressure of the refrigerant flowing out of the air conditioner external unit under different operation modes according to the opening and closing conditions of the valve.
3. The outdoor unit of claim 2, wherein the pressure detecting device is configured to bypass a refrigerant through the valve in an open state when the air conditioner is in operation.
4. The outdoor unit claimed in claim 2, wherein the valve comprises:
the first valve is connected to the first interface at one end, and is connected to the pressure sensor at the other end, and is used for opening in a cooling mode and closing in a heating mode;
and one end of the second valve is connected to the second interface, and the other end of the second valve is connected to the pressure sensor and used for being closed in the cooling mode and being opened in the heating mode.
5. The outdoor unit of claim 4, wherein the first valve is: a check valve, a solenoid valve, or an electronic expansion valve.
6. The outdoor unit of claim 4, wherein the second valve is: a check valve, a solenoid valve, or an electronic expansion valve.
7. The outdoor unit claimed in claim 1, further comprising: and the first pressure switch is arranged at the first interface and is used for switching off when the refrigerant pressure is detected to reach a first preset pressure.
8. The outdoor unit claimed in claim 1, further comprising: and the second pressure switch is arranged at the second interface and is used for switching off when the refrigerant pressure is detected to reach a second preset pressure.
9. An air conditioner, comprising: an outdoor unit as claimed in any one of claims 1 to 8.
10. The air conditioner according to claim 9, further comprising:
and the controller is used for controlling the air conditioner to operate according to the current operation mode and pressure data detected by the pressure detection device in the air conditioner external unit, and controlling the pressure detection device to bypass a refrigerant when the air conditioner operates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020043404.XU CN211625627U (en) | 2020-01-09 | 2020-01-09 | Air conditioner outdoor unit and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020043404.XU CN211625627U (en) | 2020-01-09 | 2020-01-09 | Air conditioner outdoor unit and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211625627U true CN211625627U (en) | 2020-10-02 |
Family
ID=72636708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020043404.XU Withdrawn - After Issue CN211625627U (en) | 2020-01-09 | 2020-01-09 | Air conditioner outdoor unit and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211625627U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111174336A (en) * | 2020-01-09 | 2020-05-19 | 珠海格力电器股份有限公司 | Air conditioner external unit, air conditioner and air conditioner control method |
-
2020
- 2020-01-09 CN CN202020043404.XU patent/CN211625627U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111174336A (en) * | 2020-01-09 | 2020-05-19 | 珠海格力电器股份有限公司 | Air conditioner external unit, air conditioner and air conditioner control method |
| CN111174336B (en) * | 2020-01-09 | 2024-04-05 | 珠海格力电器股份有限公司 | Air conditioner external unit, air conditioner and air conditioner control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2557377B1 (en) | Air conditioning and hot-water supply composite system | |
| US10088206B2 (en) | Air-conditioning apparatus | |
| EP3279580B1 (en) | Air-conditioning device | |
| KR101479458B1 (en) | Refrigeration device | |
| KR100821728B1 (en) | Air conditioning system | |
| CN108633225B (en) | Air conditioning system for machine room | |
| JP6223469B2 (en) | Air conditioner | |
| CN208635259U (en) | A kind of refrigeration system and air-conditioning | |
| CN109916106B (en) | Heat pump air conditioner unit capable of controlling temperature of lubricating oil and control method thereof | |
| CN105627612B (en) | The refrigeration control method of outdoor unit refrigerant pipe-line system, air conditioner and air conditioner | |
| KR100569547B1 (en) | Refrigeration equipment | |
| EP3093586A1 (en) | Air conditioning device | |
| JP2922002B2 (en) | Air conditioner | |
| CN201373632Y (en) | Multi-connected air-conditioning system | |
| EP4023961B1 (en) | Oil return control method of multifunctional multi-split system with two four-way valves | |
| CN111174336A (en) | Air conditioner external unit, air conditioner and air conditioner control method | |
| CN115038917A (en) | Air conditioner | |
| US11892209B2 (en) | Multi-air conditioner for heating and cooling including a shut-off valve between indoor and outdoor units and control method thereof | |
| CN211625627U (en) | Air conditioner outdoor unit and air conditioner | |
| KR100614364B1 (en) | Refrigeration equipment | |
| JP2001263835A (en) | Air conditioning system | |
| CN106931546B (en) | Heat pump enthalpy-spraying system, control method thereof and air conditioner | |
| CN213178886U (en) | Air conditioning system for switching outdoor unit and ground source water to supply heat by electromagnetic valve | |
| CN211400357U (en) | Air conditioning system | |
| CN210951666U (en) | Air conditioning system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20201002 Effective date of abandoning: 20240405 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20201002 Effective date of abandoning: 20240405 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |