Refrigerant regulating system and refrigerant regulating method for air conditioner

Abstract

The present invention discloses a refrigerant regulating system and a refrigerant regulating method for an air conditioner, wherein the refrigerant regulating system comprises: a compressor comprises an air intake port and an air exhaust port; one end of a first heat exchanger is connected to the air intake port; one end of a second heat exchanger is connected to the air exhaust port; a liquid storage tank comprises an inlet, a first outlet and a second outlet, and the inlet is connected to the other end of the second heat exchanger; a first throttling device is connected between the other end of the first heat exchanger and the second outlet; one end of the refrigerant regulating device is switchably connected to one of a flow path located downstream of the first throttling device and the first outlet, when one end of the refrigerant regulating device is connected to the flow path downstream of the first throttling device, the other end of the refrigerant regulating device is a refrigerant discharge end, and when one end of the refrigerant regulating device is connected to the first outlet, the other end of the refrigerant regulating device is a refrigerant filling end. According to the refrigerant regulating system of the present invention, the refrigerant of the air conditioner is the optimal refrigerant amount, and the accuracy of the heat exchange performance test of the air conditioner is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a refrigerant regulating system and a refrigerant regulating method for an air conditioner. Background Art

[0002] In the related art, the amount of refrigerant circulating inside the air conditioner during the test is usually adjusted by the tester's experience by directly discharging it or directly filling it with an external refrigerant bottle. However, the above-mentioned adjustment method causes a large deviation between the actual amount of refrigerant circulating during the operation of the air conditioner and its optimal amount of refrigerant, which will affect the performance of the air conditioner. Moreover, the directly discharged refrigerant will affect the composition of the air in the laboratory, the corresponding density, and the physical property parameters such as the specific heat capacity, thereby affecting the test accuracy of the heat exchange performance of the air conditioner to a certain extent. In addition, repeated discharge or filling of refrigerant can easily lead to the loss of oil content in the compressor. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a refrigerant regulation system that can effectively ensure that the amount of refrigerant circulating in the air conditioner is the optimal amount of refrigerant and at the same time ensure the accuracy of the heat exchange performance test of the air conditioner.

[0004] Another object of the present invention is to provide a refrigerant regulating method for an air conditioner using the refrigerant regulating system.

[0005] According to an embodiment of the first aspect of the present invention, the refrigerant conditioning system includes: a compressor, the compressor includes an air intake port and an air exhaust port; a first heat exchanger, one end of the first heat exchanger is connected to the air intake port; a second heat exchanger, one end of the second heat exchanger is connected to the air exhaust port; a liquid storage tank, the liquid storage tank includes an inlet, a first outlet and a second outlet, the inlet is connected to the other end of the second heat exchanger; a first throttling device, the first throttling device is connected between the other end of the first heat exchanger and the second outlet; a refrigerant conditioning device, one end of the refrigerant conditioning device is switchably connected to a flow path located downstream of the first throttling device and one of the first outlets, when the one end of the refrigerant conditioning device is connected to the flow path located downstream of the first throttling device, the other end of the refrigerant conditioning device is a refrigerant discharge end, and when the one end of the refrigerant conditioning device is connected to the first outlet, the other end of the refrigerant conditioning device is a refrigerant filling end.

[0006] According to the refrigerant regulating system of the embodiment of the present invention, a compressor, a first heat exchanger, a second heat exchanger, a first throttling device, a liquid storage tank and a refrigerant regulating device are arranged in the refrigerant regulating system, and one end of the refrigerant regulating device is switchably connected to one of the flow path of the liquid storage tank located downstream of the first throttling device and the first outlet, so that the amount of refrigerant circulating in the air conditioner can reach the optimal amount of refrigerant, which can effectively ensure the accuracy of the heat exchange performance test of the air conditioner. At the same time, it saves the time spent on disassembling the machine, discharging the refrigerant, vacuuming and refilling the refrigerant, thereby improving the efficiency of the performance matching of the air conditioner as a whole and reducing the emission of greenhouse gases.

[0007] According to some embodiments of the present invention, the refrigerant regulating device includes: a refrigerant regulating flow path, one end of which is switchably connected to the flow path located downstream of the first throttling device and one of the first outlets, and the other end of the refrigerant regulating flow path is the refrigerant discharge end or the refrigerant filling end; and a flow meter, which is arranged on the refrigerant regulating flow path to detect the flow rate of the refrigerant flowing through the flow meter.

[0008] According to some embodiments of the present invention, the refrigerant regulating flow path includes: a refrigerant filling flow path, one end of which is connected to the first outlet, and the other end of which is connected to the flow meter; a refrigerant discharge flow path, one end of which is connected to the flow meter, and the other end of which is connected between the other end of the first heat exchanger and the first throttling device; when the other end of the refrigerant regulating device is the refrigerant discharge end, the refrigerant discharge flow path is connected, and when the other end of the refrigerant regulating device is the refrigerant filling end, the refrigerant filling flow path is connected.

[0009] According to some embodiments of the present invention, a second throttling device is provided on the refrigerant discharge flow path.

[0010] According to some embodiments of the present invention, the refrigerant filling flow path includes a first flow path and a second flow path connected to each other, the free end of the first flow path is connected to the first outlet, the free end of the second flow path is connected to the flow meter, a first switch is provided on the first flow path to control the on-off of the first flow path, and a second switch is provided on the second flow path to control the on-off of the second flow path.

[0011] According to some embodiments of the present invention, the other end of the refrigerant filling flow path is connected to one end of the flow meter, and the one end of the refrigerant discharge flow path is connected to the other end of the flow meter; the refrigerant regulating flow path also includes: a refrigerant filling bypass, which is connected in parallel with the flow meter and the second switch, and a bypass switch is provided on the refrigerant filling bypass to control the on and off of the refrigerant filling bypass.

[0012] According to some embodiments of the present invention, the refrigerant regulating flow path also includes: a first branch, one end of which is connected to the flow meter; a second branch, the second branch is connected in parallel with the first branch, one end of which is connected to the flow meter.

[0013] According to some embodiments of the present invention, a first branch switch is provided on the first branch, and a second branch switch is provided on the second branch.

[0014] According to some embodiments of the present invention, the first branch includes a first sub-branch and a second sub-branch connected to each other, the first branch switch includes a first sub-switch and a second sub-switch, the first sub-switch is arranged on the first sub-branch, and the second sub-switch is arranged on the second sub-branch; the refrigerant regulating flow path also includes: a third branch, the third branch is connected in parallel with the flowmeter and the second sub-switch, and the third branch is provided with a third branch switch; a fourth branch, the fourth branch is connected in parallel with the third branch, and the fourth branch is provided with a fourth branch switch.

[0015] The refrigerant regulating method of an air conditioner according to the second embodiment of the present invention adopts the refrigerant regulating system according to the first embodiment of the present invention.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is a schematic diagram of a refrigerant conditioning system and an air conditioner according to an embodiment of the present invention;

[0019] Figure 2 yes Figure 1 A schematic diagram of a refrigerant regulating system and an air conditioner for adding refrigerant into the air conditioner when the air conditioner is cooling;

[0020] Figure 3 yes Figure 1 Schematic diagram of the refrigerant conditioning system and the air conditioner discharging the refrigerant in the air conditioner when the air conditioner is cooling;

[0021] Figure 4 yes Figure 1 Schematic diagram of the refrigerant regulating system and the air conditioner when the air conditioner is heating;

[0022] Figure 5 yes Figure 1 Schematic diagram of a refrigerant conditioning system and an air conditioner discharging refrigerant in the air conditioner when the air conditioner is heating.

[0023] Reference numerals:

[0024] 100: Refrigerant conditioning system;

[0025] 1: compressor; 11: air intake; 12: air exhaust;

[0026] 2: first heat exchanger; 3: second heat exchanger; 4: first throttling device;

[0027] 5: liquid storage tank; 51: inlet; 52: first outlet; 53: second outlet;

[0028] 6: refrigerant regulating device; 61: refrigerant filling flow path; 611: first flow path;

[0029] 6111: first switch; 612: second flow path; 6121: second switch;

[0030] 62: refrigerant discharge flow path; 621: second throttling device; 63: flow meter;

[0031] 64: Refrigerant filling bypass; 641: Bypass switch; 65: First branch;

[0032] 651: first branch switch; 6511: first sub-switch; 6512: second sub-switch;

[0033] 652: first sub-branch; 653: second sub-branch; 66: second branch;

[0034] 661: Second branch switch; 67: Third branch; 671: Third branch switch;

[0035] 68: the fourth branch; 681: the fourth branch switch;

[0036] 200: Air conditioner;

[0037] 201: air conditioning compressor; 202: throttling device;

[0038] 203: Indoor heat exchanger; 204: Outdoor heat exchanger. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] The air conditioner 200 in this application performs a refrigeration cycle of the air conditioner 200 by using an air conditioner compressor 201, a condenser, a throttling device 202 and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation, and supplies refrigerant to conditioned and heat-exchanged air.

[0041] The air conditioner compressor 201 compresses the refrigerant gas in a high temperature and high pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0042] The throttling device 202 expands the high-temperature and high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the refrigerant expanded in the throttling device 202 and returns the refrigerant gas in a low-temperature and low-pressure state to the air-conditioning compressor 201. The evaporator can achieve a refrigeration effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. In the whole cycle, the air conditioner 200 can adjust the temperature of the indoor space.

[0043] The outdoor unit of the air conditioner 200 refers to a part of a refrigeration cycle including an air conditioning compressor 201 and an outdoor heat exchanger 204, the indoor unit of the air conditioner 200 includes an indoor heat exchanger 203, and the throttling device 202 may be provided in the indoor unit or the outdoor unit.

[0044] The indoor heat exchanger 203 and the outdoor heat exchanger 204 function as a condenser or an evaporator. When the indoor heat exchanger functions as a condenser, the air conditioner 200 functions as a heater in a heating mode, and when the indoor heat exchanger functions as an evaporator, the air conditioner 200 functions as a cooler in a cooling mode.

[0045] Reference below Figure 1-Figure 5 The refrigerant regulating system 100 according to an embodiment of the present invention is described. The refrigerant regulating system 100 can be applied to the air conditioner 200 to regulate the amount of refrigerant in the air conditioner 200. Among them, the refrigerant regulating system 100 can regulate the amount of refrigerant in the air conditioner 200 during the test phase so that the refrigerant content in the air conditioner 200 reaches an optimal value. Of course, the refrigerant regulating system 100 can also regulate the amount of refrigerant in the air conditioner 200 during actual use so that the amount of refrigerant in the air conditioner 200 reaches the optimal use state value.

[0046] In the following description of the present application, the refrigerant conditioning system 100 is applied to the air conditioner 200 in the test phase as an example for explanation. Of course, those skilled in the art can understand that the refrigerant conditioning system 100 can also be applied to other types of equipment, not limited to the air conditioner 200.

[0047] like Figure 1-Figure 5 As shown, the refrigerant conditioning system 100 according to the first embodiment of the present invention includes a compressor 1, a first heat exchanger 2, a second heat exchanger 3, a first throttling device 4, a liquid storage tank 5 and a refrigerant conditioning device 6.

[0048] Specifically, the compressor 1 includes an air intake port 11 and an air discharge port 12. The air intake port 11 is used to inhale the refrigerant to be compressed (for example, the refrigerant of low temperature and low pressure), and the air discharge port 12 is used to discharge the compressed refrigerant (for example, the refrigerant of high temperature and high pressure). Figure 1 The lower end of the second heat exchanger 3 is connected to the air intake port 11, and one end of the second heat exchanger 3 (for example, Figure 1 The lower end of the second heat exchanger 3 is connected to the exhaust port 12. The liquid storage tank 5 includes an inlet 51, a first outlet 52 and a second outlet 53. The inlet 51 is connected to the other end of the second heat exchanger 3 (for example, Figure 1 The refrigerant in the liquid storage tank 5 can flow from the first outlet 52 into the air conditioner 200 to fill the air conditioner with refrigerant. The refrigerant in the air conditioner 200 can flow into the liquid storage tank 5 through the inlet 51 to discharge the refrigerant in the air conditioner 200. The first throttling device 4 is connected to the other end of the first heat exchanger 2 (for example, Figure 1 between the upper end of the outlet 52 and the second outlet 53.

[0049] With such arrangement, when the refrigerant regulating system 100 is used to regulate the refrigerant in the air conditioner 200 during the test, since the pressures of the refrigerant at different positions in the refrigerant circulation loop formed by the compressor 1, the first heat exchanger 2, the second heat exchanger 3, the first throttling device 4 and the liquid storage tank 5 may be different, the refrigerant in the refrigerant circulation loop can be converted from a low-temperature and low-pressure refrigerant to a high-temperature and high-pressure refrigerant after passing through the compressor 1, the first heat exchanger 2, the second heat exchanger 3 and the first throttling device 4. Since the inlet 51 of the liquid storage tank 5 is connected to the above-mentioned other end of the second heat exchanger 3, the refrigerant flowing out of the above-mentioned other end of the second heat exchanger 3 is a high-temperature and high-pressure refrigerant, and thus the refrigerant flowing into the liquid storage tank 5 from the inlet 51 is a high-temperature and high-pressure refrigerant. The above-mentioned refrigerant circulation loop can effectively ensure the pressure environment in the refrigerant regulating system 100 and ensure that the refrigerant in the liquid storage tank 5 is in a high-pressure liquid state, so that the refrigerant in the air conditioner 200 can be discharged into the refrigerant regulating system 100 at any time or the refrigerant in the refrigerant regulating system 100 can be added to the air conditioner 200 at any time, so that the refrigerant amount in the air conditioner 200 can be continuously adjusted to the optimal refrigerant amount.

[0050] One end of the refrigerant regulating device 6 is switchably connected to one of the flow path located downstream of the first throttling device 4 and the first outlet 52. When the above-mentioned one end of the refrigerant regulating device 6 is connected to the flow path located downstream of the first throttling device 4, the other end of the refrigerant regulating device 6 is the refrigerant discharge end (such as Figure 3 and Figure 5 As shown). When the amount of refrigerant actually circulating in the air conditioner 200 is greater than its optimal amount of refrigerant, the refrigerant discharge end can be connected to the high-pressure section of the air conditioner 200, and the refrigerant pressure of the high-pressure section of the air conditioner 200 is greater than the pressure of the refrigerant in the flow path downstream of the first throttling device 4, so that the air conditioner 200 can smoothly flow the excess high-pressure refrigerant to the flow path downstream of the first throttling device 4 through the refrigerant regulating device 6, so that the refrigerant in the flow path downstream of the first throttling device 4 can be converted into a high-pressure liquid state through the first heat exchanger 2, the compressor 1 and the second heat exchanger 3 in sequence, and finally flow into the liquid storage tank 5 of the refrigerant regulating system 100.

[0051] When the above-mentioned one end of the refrigerant regulating device 6 is connected to the first outlet 52, the above-mentioned other end of the refrigerant regulating device 6 is a refrigerant filling end (such as Figure 2 and Figure 4 When the amount of refrigerant actually circulating in the air conditioner 200 is less than the optimal amount of refrigerant, the refrigerant filling end can be connected to the low-pressure section of the air conditioner 200. Since the refrigerant in the liquid storage tank 5 is a high-pressure liquid refrigerant, the refrigerant in the liquid storage tank 5 of the refrigerant regulating system 100 can be filled into the air conditioner 200 through the first outlet 52 via the refrigerant regulating device 6.

[0052] Thus, compared with the conventional refrigerant regulation method of the air conditioner, the amount of refrigerant in the air conditioner 200 can be regulated by the refrigerant regulation system 100 until the amount of refrigerant actually circulating in the air conditioner 200 reaches the optimal amount of refrigerant. Moreover, during the refrigerant regulation process of the air conditioner 200, the refrigerant can always circulate in a closed environment, thereby effectively ensuring the stability of the physical parameters such as the composition, density and specific heat capacity of the air in the laboratory, and further effectively ensuring the accuracy of the heat exchange performance test of the air conditioner 200. At the same time, the air conditioner 200 can accurately regulate the amount of refrigerant in the air conditioner 200 without disassembling the machine, saving the time spent on disassembling the machine, discharging the refrigerant, vacuuming and refilling the refrigerant, thereby improving the efficiency of the performance matching of the whole machine of the air conditioner 200 and reducing the emission of greenhouse gases.

[0053] According to the refrigerant conditioning system 100 of the embodiment of the present invention, by arranging a compressor 1, a first heat exchanger 2, a second heat exchanger 3, a first throttling device 4, a liquid storage tank 5 and a refrigerant conditioning device 6 in the refrigerant conditioning system 100, and one end of the refrigerant conditioning device 6 is switchably connected to one of the flow path of the liquid storage tank 5 located downstream of the first throttling device 4 and the first outlet 52, the amount of refrigerant circulating in the air conditioner 200 can reach the optimal amount of refrigerant, and the accuracy of the heat exchange performance test of the air conditioner 200 can be effectively guaranteed. Moreover, the efficiency of the performance matching of the whole air conditioner 200 can be improved, the emission of greenhouse gases can be reduced, and it is environmentally friendly.

[0054] According to some embodiments of the present invention, Figure 1-Figure 5 As shown, the refrigerant regulating device 6 includes a refrigerant regulating flow path and a flow meter 63. One end of the refrigerant regulating flow path is switchably connected to the above-mentioned flow path located downstream of the first throttling device 4 and one of the first outlets 52, and the other end of the refrigerant regulating flow path is a refrigerant discharge end or a refrigerant filling end. The flow meter 63 is arranged on the refrigerant regulating flow path to detect the flow rate of the refrigerant flowing through the flow meter 63. When the above-mentioned one end of the refrigerant regulating flow path is connected to the above-mentioned flow path located downstream of the first throttling device 4, the other end of the refrigerant regulating flow path is a refrigerant discharge end (such as Figure 3 and Figure 5 As shown), at this time, the air conditioner 200 can discharge the excess refrigerant into the liquid storage tank 5 of the refrigerant regulation system 100 through the refrigerant regulation flow path. In the above process, the refrigerant discharged from the air conditioner 200 flows through the flow meter 63, so that the flow rate of the refrigerant discharged from the air conditioner 200 can be detected; when the above one end of the refrigerant regulation flow path is connected to the first outlet 52, the above other end of the refrigerant regulation flow path is the refrigerant filling end (as shown in FIG. Figure 2 and Figure 4As shown), at this time, the refrigerant in the refrigerant regulating system 100 can be added to the air conditioner 200 through the refrigerant regulating flow path. In the above process, the refrigerant discharged from the refrigerant regulating system 100 flows through the flow meter 63, so that the flow rate of the refrigerant discharged from the refrigerant regulating system 100 can be detected. Therefore, the tester can calculate the actual amount of refrigerant in the air conditioner 200 after filling or discharging according to the amount of refrigerant pre-filled in the air conditioner 200 and the flow rate of the refrigerant flowing through the flow meter 63 (including the amount of refrigerant added or discharged), so as to realize that the refrigerant regulating system 100 quantitatively fills or discharges the refrigerant in the air conditioner 200 when the air conditioner 200 is in operation, and then the amount of refrigerant in the tested air conditioner 200 can be accurately controlled. In addition, by setting the flow meter 63, the flow rate of the refrigerant flowing through the refrigerant regulating flow path can be accurately detected, so that the refrigerant regulating system 100 can reduce the number of times of discharging or filling the refrigerant, and then the loss of oil content in the air conditioner compressor 201 can be effectively reduced.

[0055] Optionally, the flow meter 63 may be a mass flow meter, but is not limited thereto.

[0056] Further, refer to Figure 2-Figure 5 The refrigerant regulating flow path includes a refrigerant filling flow path 61 and a refrigerant discharge flow path 62. One end of the refrigerant filling flow path 61 is connected to the first outlet 52, and the other end of the refrigerant filling flow path 61 is connected to the flow meter 63. When the other end of the refrigerant regulating device 6 is the refrigerant filling end, the refrigerant filling flow path 61 is open (such as Figure 2 and Figure 4 As shown). At this time, the other end of the refrigerant regulating device 6 is the high-pressure end and is connected to the low-pressure section of the air conditioner 200. The refrigerant in the liquid storage tank 5 can smoothly flow to the air conditioner 200 through the refrigerant filling flow path 61 and the flow meter 63. In the above process, the flow meter 63 can detect the flow rate of the refrigerant flowing through the refrigerant filling flow path 61 in real time, so that the tester can obtain the accurate amount of refrigerant filled into the air conditioner 200. One end of the refrigerant discharge flow path 62 is connected to the flow meter 63, and the other end of the refrigerant discharge flow path 62 is connected between the other end of the first heat exchanger 2 and the first throttling device 4. When the other end of the refrigerant regulating device 6 is the refrigerant discharge end, the refrigerant discharge flow path 62 is connected (as shown). Figure 3 and Figure 5 As shown), at this time, the other end of the refrigerant regulating device 6 is the low-pressure end and is connected to the high-pressure section of the air conditioner 200. The refrigerant in the air conditioner 200 can smoothly flow to the liquid storage tank 5 through the refrigerant discharge flow path 62 and the flow meter 63. In the above process, the flow meter 63 can detect the flow rate of the refrigerant flowing through the refrigerant discharge flow path 62 in real time, so that the tester can obtain the remaining amount of refrigerant in the air conditioner 200.

[0057] Optionally, a second throttling device 621 is provided on the refrigerant discharge flow path 62. Figure 1-Figure 5 In the example, one end of the refrigerant discharge flow path 62 is connected between the first heat exchanger 2 and the first throttling device 4, the other end of the refrigerant discharge flow path 62 is connected to the refrigerant filling flow path 61, and the second throttling device 621 is connected in series to the refrigerant discharge flow path 62. When the air conditioner 200 discharges the refrigerant, the tester can adjust the opening of the second throttling device 621 to make the refrigerant discharge flow path 62 conductive, and the high-pressure liquid refrigerant discharged by the air conditioner 200 can be throttled and depressurized through the second throttling device 621, so that the above refrigerant can smoothly enter the first heat exchanger 2, and can exchange heat with the liquid refrigerant in the first heat exchanger 2 to ensure that the refrigerant entering the compressor 1 is gaseous, so that the phenomenon of liquid hammer in the compressor 1 can be effectively avoided. After that, the refrigerant discharged from the compressor 1 becomes a high-pressure liquid refrigerant after heat exchange in the second heat exchanger 3, and finally flows into the liquid storage tank 5. Thus, by providing the second throttling device 621, the refrigerant in the refrigerant discharge flow path 62 can be depressurized, so that the refrigerant flowing before entering the second throttling device 621 and the refrigerant flowing into the first heat exchanger 2 form a pressure difference, ensuring that the refrigerant in the refrigerant discharge flow path 62 can smoothly flow into the first heat exchanger 2. Optionally, the second throttling device 621 can be an electronic expansion valve, but is not limited thereto.

[0058] According to some specific embodiments of the present invention, the refrigerant filling flow path 61 includes a first flow path 611 and a second flow path 612 connected to each other, the free end of the first flow path 611 is connected to the first outlet 52 of the liquid storage tank 5, the free end of the second flow path 612 is connected to the flow meter 63, the first flow path 611 is provided with a first switch 6111 to control the on and off of the first flow path 611, and the second flow path 612 is provided with a second switch 6121 to control the on and off of the second flow path 612. For example, in Figure 2 and Figure 4 In the example, when the air conditioner 200 needs to be filled with refrigerant, the first switch 6111 and the second switch 6121 are both in the open state, so that the refrigerant filling flow path 61 is connected, and the refrigerant in the liquid storage tank 5 can flow through the first flow path 611, the second flow path 612 and the flow meter 63 in sequence and flow to the air conditioner 200. When the air conditioner 200 needs to discharge the refrigerant, the first switch 6111 and the second switch 6121 are both in the closed state, so that the refrigerant in the air conditioner 200 can flow to the liquid storage tank 5 through the inlet 51 along the refrigerant discharge flow path 62, effectively preventing the refrigerant from flowing from the first outlet 52 to the liquid storage tank 5 or the refrigerant from flowing directly into the liquid storage tank 5 without flowing through the flow meter 63. Therefore, by setting the first switch 6111 and the second switch 6121, it is effectively ensured that the refrigerant in the liquid storage tank 5 can flow to the air conditioner 200 according to the specified flow path, and at the same time, the amount of refrigerant filled in the air conditioner 200 can be accurately obtained.

[0059] Furthermore, combined with Figure 1-Figure 5, the other end of the refrigerant filling flow path 61 is connected to one end of the flow meter 63, and the one end of the refrigerant discharge flow path 62 is connected to the other end of the flow meter 63. In this way, when the refrigerant adjustment system 100 is working, whether the refrigerant filling flow path 61 is connected or the refrigerant discharge flow path 62 is connected, the refrigerant flowing through the refrigerant filling flow path 61 or the refrigerant discharge flow path 62 flows through the flow meter 63, and the flow meter 63 can accurately detect the flow rate of the refrigerant flowing through the refrigerant filling flow path 61 or the refrigerant discharge flow path 62, so that the tester can know the actual amount of refrigerant in the air conditioner 200 after each adjustment.

[0060] The refrigerant regulating flow path also includes a refrigerant filling bypass 64, which is connected in parallel with the flow meter 63 and the second switch 6121. The refrigerant filling bypass 64 is provided with a bypass switch 641 to control the on and off of the refrigerant filling bypass 64. Figure 3 and Figure 5 In the example, when the air conditioner 200 needs to discharge the refrigerant, the bypass switch 641 is in the open state to make the refrigerant filling bypass 64 conductive. At this time, the refrigerant in the air conditioner 200 can flow into the liquid storage tank 5 through the flow meter 63, the refrigerant filling bypass 64, the refrigerant discharge flow path 62, the first heat exchanger 2, the compressor 1 and the second heat exchanger 3, effectively ensuring that the refrigerant of the air conditioner 200 can flow into the liquid storage tank 5 according to the specified flow path.

[0061] According to some specific embodiments of the present invention, the refrigerant regulating flow path further includes a first branch 65 and a second branch 66, one end of the first branch 65 is connected to the flow meter 63, the second branch 66 is connected in parallel with the first branch 65, and one end of the second branch 66 is connected to the flow meter 63. Figure 2 When the air conditioner 200 is filled with refrigerant in the cooling mode, the other end of the first branch 65 is a high-pressure end and is suitable for communicating with the low-pressure section of the air conditioner 200. The high-pressure refrigerant in the liquid storage tank 5 can flow smoothly to the air conditioner 200 through the refrigerant filling flow path 61, the flow meter 63 and the first branch 65. Figure 3 When the air conditioner 200 discharges the refrigerant in the cooling mode, the other end of the second branch 66 is a low-pressure end and is suitable for communicating with the high-pressure section of the air conditioner 200. The refrigerant in the air conditioner 200 can flow to the liquid storage tank 5 through the second branch 66, the flow meter 63, the refrigerant filling bypass 64 and the refrigerant discharge flow path 62. Therefore, when the air conditioner 200 is in the cooling mode, the refrigerant can be filled into the low-pressure section of the air conditioner 200 or discharged from the high-pressure section of the air conditioner 200 from different flow paths, so that the refrigerant in the air conditioner 200 can be adjusted in a closed environment, and the automatic adjustment of the refrigerant in the air conditioner 200 can be achieved.

[0062] Furthermore, if Figure 1-Figure 5As shown, the first branch 65 is provided with a first branch switch 651. For example, the first branch 65 includes a first sub-branch 652 and a second sub-branch 653 connected to each other, one end of the second sub-branch 653 is connected to one end of the refrigerant filling bypass 64 adjacent to the flow meter 63, the other end of the second sub-branch 653 is connected to one end of the first sub-branch 652, and the other end of the first sub-branch 652 is suitable for connecting between the throttling device 202 and the indoor heat exchanger 203 of the air conditioner 200. The first branch switch 651 includes a first sub-switch 6511 and a second sub-switch 6512. The first sub-switch 6511 is provided on the first sub-branch 652 to control the on-off of the first sub-branch 652. The second sub-switch 6512 is provided on the second sub-branch 653 to control the on-off of the second sub-branch 653. When the air conditioner 200 is filled with refrigerant in the cooling mode, the first sub-switch 6511 and the second sub-switch 6512 are both turned on, the first sub-branch 652 and the second sub-branch 653 are both turned on, and the refrigerant in the liquid storage tank 5 can flow into the air conditioner 200 through the refrigerant filling flow path 61, the flow meter 63, the first sub-branch 652 and the second sub-branch 653. When the air conditioner 200 is filled with refrigerant in the heating mode, the first sub-switch 6511 is turned off, the second sub-switch 6512 is turned on, and the second sub-branch 653 is turned on, and the refrigerant in the liquid storage tank 5 can flow into the air conditioner 200 through the refrigerant filling flow path 61, the flow meter 63 and the second sub-branch 653. Therefore, when the air conditioner 200 is filled with refrigerant, the refrigerant in different operating modes can flow into the air conditioner 200 from different flow paths.

[0063] The second branch 66 is provided with a second branch switch 661 for controlling the on and off of the second branch 66. When the air conditioner 200 discharges the refrigerant in the cooling mode, the second branch switch 661 is turned on, the second branch 66 is turned on, and the refrigerant in the air conditioner 200 can flow to the liquid storage tank 5 through the second branch 66, the flow meter 63, the refrigerant filling bypass 64 and the refrigerant discharge flow path 62, the first heat exchanger 2, the compressor 1 and the second heat exchanger 3. In this way, the refrigerant can circulate in the air conditioner 200 and the refrigerant conditioning system 100 according to a specific flow path.

[0064] Reference Figure 5 The refrigerant regulating flow path also includes a third branch 67 and a fourth branch 68. The third branch 67 is connected in parallel with the flow meter 63 and the second sub-switch 6512. The third branch 67 is provided with a third branch switch 671 for controlling the on and off of the third branch 67. For example, Figure 5In the example, one end of the third branch 67 is connected to the left end of the flow meter 63, and the other end of the third branch 67 is connected to the end of the second sub-branch 653 away from the flow meter 63. When the air conditioner 200 discharges the refrigerant in the heating mode, the first sub-switch 6511 and the third branch switch 671 can be both turned on. At this time, the refrigerant in the air conditioner 200 can flow through the first sub-branch 642, the third branch 67, the flow meter 63, the refrigerant filling bypass 64, the refrigerant discharge flow path 62, the first heat exchanger 2, the compressor 1 and the second heat exchanger 3 to the liquid storage tank 5 in sequence.

[0065] Reference Figure 4 , the fourth branch 68 is connected in parallel with the third branch 67, and a fourth branch switch 681 is provided on the fourth branch 68 to control the on and off of the fourth branch 68. One end of the fourth branch 68 is connected to one end of the second branch 66, and the other end of the fourth branch 68 is connected to one end of the second sub-branch 653. When the air conditioner 200 is filled with refrigerant in the heating mode, the first switch 6111, the second switch 6121, the fourth branch switch 681 and the second sub-switch 6512 can all be turned on, and the refrigerant in the liquid storage tank 5 can flow to the air conditioner 200 through the refrigerant filling flow path 61, the flow meter 63, the second sub-branch 653 and the fourth branch 68. In this arrangement, when the air conditioner 200 discharges or adds refrigerant in the heating mode, the third branch switch 671 and the fourth branch switch 681 can respectively control the conduction of the third branch 67 and the fourth branch 68, so that the air conditioner 200 can add or discharge refrigerant through different flow paths in the heating mode to ensure that the refrigerant in the air conditioner 200 can reach the optimal refrigerant amount.

[0066] Optionally, the first switch 6111, the second switch 6121, the first sub-switch 6511 and the second sub-switch 6512, the bypass switch 641, the second branch switch 661, the third branch switch 671 and the fourth branch switch 681 may all be solenoid valves, but the present invention is not limited thereto.

[0067] The specific working mode of the refrigerant conditioning system 100 according to the embodiment of the present invention is as follows:

[0068] like Figure 1-Figure 5 As shown, one end of the second branch 66 of the refrigerant conditioning system 100 away from the flow meter 63 is connected between the throttling device 202 of the air conditioner 200 and the outdoor heat exchanger 204, and one end of the first sub-branch 652 away from the flow meter 63 is connected between the throttling device 202 and the indoor heat exchanger 203. The first throttling device 4 and the second throttling device 621 can both be electronic expansion valves.

[0069] like Figure 2As shown, when the air conditioner 200 is in cooling mode and meets the refrigerant filling condition, the refrigerant regulation system 100 can receive the refrigerant filling signal, open the first switch 6111, the second switch 6121, the first sub-switch 6511 and the second sub-switch 6512, close the bypass switch 641, the second branch switch 661, the third branch switch 671 and the fourth branch switch 681, and reduce the opening degree of the first throttling device 4 and the second throttling device 621. At this time, the refrigerant filling flow path 61 and the first branch 65 are connected, and the refrigerant in the liquid storage tank 5 can flow to the air conditioner 200 through the refrigerant filling flow path 61, the flow meter 63, and the first branch 65. Among them, the refrigerant filling condition can include simultaneously satisfying that the exhaust temperature T0 of the air conditioning compressor 201 is greater than the maximum exhaust temperature T 0max , the current operating power P of the air-conditioning compressor 201 is less than the reference power ΔP and the amount of refrigerant L in the air-conditioning unit 200 is less than the upper limit value L of the refrigerant amount max The reference power ΔP is the minimum value Q of the heat exchange capacity of the air conditioner 200. min The energy efficiency limit EER of air conditioner 200 min The ratio of the energy efficiency lower limit EER of air conditioner 200 min It is the minimum allowable value of the ratio of the heat exchange capacity to the power consumption of the air conditioner 200. max It refers to the maximum value of the refrigerant allowed to circulate in the air conditioner 200.

[0070] When the time of adding refrigerant to the air conditioner 200 continues for a period Δt, the refrigerant is stopped, and the first switch 6111, the second switch 6121, the first sub-switch 6511 and the second sub-switch 6512 are closed, so that the refrigerant in the refrigerant conditioning system 100 circulates between the compressor 1, the first heat exchanger 2, the second heat exchanger 3, the first throttling device 4 and the liquid storage tank 5, providing a refrigerant filling point for the air conditioner 200 at any time. The flow meter 63 can detect the flow rate l of the refrigerant flowing through the flow meter 63, and the total amount L1 of the refrigerant participating in the circulation in the air conditioner 200 at this time is calculated by the correlation formula L1=L+l×Δt, wherein L is the amount of refrigerant in the air conditioner 200 before the air conditioner 200 is filled or discharged.

[0071] When the switches in the refrigerant regulating system 100 are closed for a certain period of time, it is determined whether the air conditioner 200 meets the above-mentioned refrigerant filling conditions. If the result of the determination is yes, the above-mentioned operation is continued to fill the refrigerant into the air conditioner 200. If the determination is no, the refrigerant filling mode is exited and the refrigerant discharge mode is executed until the refrigerant amount of the air conditioner 200 reaches the optimal refrigerant amount and the operation is terminated.

[0072] like Figure 3As shown, when the air conditioner 200 is in cooling mode and meets the refrigerant discharge condition, the refrigerant regulation system 100 can receive the refrigerant discharge signal, open the bypass switch 641 and the second branch switch 661, close the first switch 6111, the second switch 6121, the first sub-switch 6511, the second sub-switch 6512, the third branch switch 671 and the fourth branch switch 681, and increase the opening degree of the first throttling device 4 and the second throttling device 621. At this time, the second branch 66, the refrigerant filling bypass 64 and the refrigerant discharge flow path 62 are connected, and the refrigerant in the air conditioner 200 can flow to the liquid storage tank 5 through the second branch 66, the flow meter 63, the refrigerant filling bypass 64, the refrigerant discharge flow path 62, the first heat exchanger 2, the compressor 1 and the second heat exchanger 3. Among them, the refrigerant discharge condition can include simultaneously satisfying that the exhaust temperature T0 of the air conditioner compressor 201 is less than the maximum exhaust temperature T 0max The current operating power P of the air-conditioning compressor 201 is greater than the reference power ΔP or the amount of refrigerant L in the air-conditioning unit 200 is greater than the upper limit value L of the refrigerant amount. max .

[0073] When the air conditioner 200 discharges the refrigerant for a period of Δt, it stops discharging the refrigerant and closes the bypass switch 641 and the second branch switch 661, so that the refrigerant in the refrigerant conditioning system 100 circulates between the compressor 1, the first heat exchanger 2, the second heat exchanger 3, the first throttling device 4 and the liquid storage tank 5, providing a discharge point for the air conditioner 200 to discharge the refrigerant at any time. The flow meter 63 can detect the flow rate l of the refrigerant flowing through the flow meter 63, and the total amount L1 of the refrigerant participating in the circulation in the air conditioner 200 at this time is calculated by the correlation formula L1=Ll×Δt.

[0074] When the switches in the refrigerant regulating system 100 are closed for a certain period of time, it is determined whether the air conditioner 200 meets the above-mentioned refrigerant discharge conditions. If the result of the determination is yes, the above-mentioned operation is continued to make the air conditioner 200 discharge the refrigerant to the outside. If the determination is no, the refrigerant discharge mode is exited and the refrigerant filling mode is executed until the refrigerant amount of the air conditioner 200 reaches the optimal refrigerant amount, and the operation is terminated.

[0075] Therefore, when the air conditioner 200 is in cooling mode, the refrigerant of the air conditioner 200 and the refrigerant of the liquid storage tank 5 can be circulated and filled or discharged between the air conditioner 200 and the refrigerant conditioning system 100 through different flow paths to ensure that the actual amount of refrigerant circulating in the air conditioner 200 can reach the optimal amount of refrigerant.

[0076] like Figure 4As shown, when the air conditioner 200 is in heating mode and meets the above-mentioned refrigerant filling conditions, the refrigerant regulation system 100 can receive a refrigerant filling signal, open the first switch 6111, the second switch 6121, the second sub-switch 6512 and the fourth branch switch 681, close the first sub-switch 6511, the bypass switch 641, the second branch switch 661 and the third branch switch 671, and reduce the opening degree of the first throttling device 4 and the second throttling device 621. At this time, the refrigerant filling flow path 61, the second sub-branch 643 and the fourth branch 68 are connected, and the refrigerant in the storage tank 5 can flow to the air conditioner 200 through the refrigerant filling flow path, the flowmeter 63, the second sub-branch 643 and the fourth branch 68.

[0077] When the time of adding refrigerant to the air conditioner 200 continues for a period Δt, the adding of refrigerant is stopped, and the first switch 6111, the second switch 6121, the second sub-switch 6412 and the fourth branch switch 681 are closed, so that the refrigerant in the refrigerant conditioning system 100 circulates between the compressor 1, the first heat exchanger 2, the second heat exchanger 3, the first throttling device 4 and the liquid storage tank 5, providing a filling point for adding refrigerant to the air conditioner 200 at any time. The flow meter 63 can detect the flow rate l of the refrigerant flowing through the flow meter 63, and the total amount L1 of the refrigerant participating in the circulation in the air conditioner 200 at this time is calculated by the correlation formula L1=L+l×Δt.

[0078] When the switches of the refrigerant regulating system 100 are closed for a certain period of time, it is determined whether the air conditioner 200 meets the above-mentioned refrigerant filling conditions. If the result of the determination is yes, the above-mentioned operation is continued to fill the refrigerant into the air conditioner 200. If the determination is no, the refrigerant filling mode is exited and the refrigerant discharge mode is executed until the refrigerant amount of the air conditioner 200 reaches the optimal refrigerant amount and the operation is terminated.

[0079] like Figure 5 As shown, when the air conditioner 200 is in heating mode and meets the above-mentioned refrigerant discharge conditions, the refrigerant regulation system 100 can receive a refrigerant discharge signal, open the bypass switch 641, the first sub-switch 6511 and the third branch switch 671, close the first switch 6111, the second switch 6121, the second sub-switch 6512, the second branch switch 661 and the fourth branch switch 681, and increase the opening degree of the first throttling device 4 and the second throttling device 621. At this time, the first sub-branch 652, the third branch 67, the refrigerant filling bypass 64 and the refrigerant discharge flow path 62 are connected, and the refrigerant in the air conditioner 200 can flow to the liquid storage tank 5 via the first sub-branch 652, the third branch 67, the flowmeter 63, the refrigerant filling bypass 64, the refrigerant discharge flow path 62, the first heat exchanger 2, the compressor 1 and the second heat exchanger 3.

[0080] When the air conditioner 200 discharges the refrigerant for a period of Δt, the refrigerant is stopped and the bypass switch 641, the first sub-switch 6511 and the third branch switch 671 are closed, so that the refrigerant in the refrigerant conditioning system 100 circulates between the compressor 1, the first heat exchanger 2, the second heat exchanger 3, the first throttling device 4 and the liquid storage tank 5, providing a discharge point for the air conditioner 200 to discharge the refrigerant at any time. The flow meter 63 can detect the flow rate l of the refrigerant flowing through the flow meter 63, and the total amount L1 of the refrigerant participating in the circulation in the air conditioner 200 at this time is calculated by the correlation formula L1=Ll×Δt.

[0081] When the switches of the refrigerant regulating system 100 are closed for a certain period of time, it is determined whether the air conditioner 200 meets the above-mentioned refrigerant discharge conditions. If the result of the determination is yes, the above-mentioned operation is continued to make the air conditioner 200 discharge the refrigerant to the outside. If the determination is no, the refrigerant discharge mode is exited and the refrigerant filling mode is executed until the refrigerant amount of the air conditioner 200 reaches the optimal refrigerant amount, and the operation is terminated.

[0082] Therefore, when the air conditioner 200 is in heating mode, the refrigerant of the air conditioner 200 and the refrigerant in the liquid storage tank 5 can be circulated and filled or discharged between the air conditioner 200 and the refrigerant regulation system 100 through different flow paths to ensure that the actual amount of refrigerant circulating in the air conditioner 200 can reach the optimal amount of refrigerant.

[0083] The refrigerant conditioning method of the air conditioner 200 according to the second embodiment of the present invention adopts the refrigerant conditioning system 100 according to the first embodiment of the present invention.

[0084] According to the refrigerant regulating method of the air conditioner 200 according to the embodiment of the present invention, by adopting the above-mentioned refrigerant regulating system 100, it can effectively ensure that the amount of refrigerant in the air conditioner 200 is the optimal amount of refrigerant, while ensuring the accuracy of the heat exchange performance test of the air conditioner 200.

[0085] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0086] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0087] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0088] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A refrigerant conditioning system, characterized in that: include: A compressor, the compressor comprising an air intake port and an air discharge port; A first heat exchanger, one end of which is connected to the air intake port; a second heat exchanger, wherein one end of the second heat exchanger is connected to the exhaust port; a liquid storage tank, the liquid storage tank comprising an inlet, a first outlet and a second outlet, the inlet being connected to the other end of the second heat exchanger; a first throttling device, the first throttling device being connected between the other end of the first heat exchanger and the second outlet; A refrigerant regulating device, the refrigerant regulating device comprising a refrigerant regulating flow path, one end of the refrigerant regulating device being switchably connected to one of the flow path located downstream of the first throttling device and the first outlet, when the one end of the refrigerant regulating device is connected to the flow path located downstream of the first throttling device, the other end of the refrigerant regulating device is a refrigerant discharge end, and the air conditioner discharges excess refrigerant to a liquid storage tank of the refrigerant regulating system through the refrigerant regulating flow path; When the one end of the refrigerant regulating device is connected to the first outlet, the other end of the refrigerant regulating device is a refrigerant filling end, and the refrigerant in the refrigerant regulating system is filled into the air conditioner through the refrigerant regulating flow path.

2. The refrigerant conditioning system according to claim 1, characterized in that: The refrigerant regulating device comprises: A refrigerant regulating flow path, one end of which is switchably connected to one of the flow path located downstream of the first throttling device and the first outlet, and the other end of which is the refrigerant discharge end or the refrigerant filling end; A flow meter is provided on the refrigerant regulating flow path to detect the flow rate of the refrigerant flowing through the flow meter.

3. The refrigerant conditioning system according to claim 2, characterized in that: The refrigerant regulating flow path comprises: a refrigerant filling flow path, one end of which is connected to the first outlet, and the other end of which is connected to the flow meter; a refrigerant discharge flow path, one end of which is connected to the flow meter, and the other end of which is connected between the other end of the first heat exchanger and the first throttling device; When the other end of the refrigerant regulating device is the refrigerant discharge end, the refrigerant discharge flow path is open, and when the other end of the refrigerant regulating device is the refrigerant filling end, the refrigerant filling flow path is open.

4. The refrigerant conditioning system according to claim 3, characterized in that: A second throttling device is provided on the refrigerant discharge flow path.

5. The refrigerant conditioning system according to claim 3, characterized in that: The refrigerant filling flow path includes a first flow path and a second flow path connected to each other, the free end of the first flow path is connected to the first outlet, the free end of the second flow path is connected to the flow meter, a first switch is provided on the first flow path to control the on and off of the first flow path, and a second switch is provided on the second flow path to control the on and off of the second flow path.

6. The refrigerant conditioning system according to claim 5, characterized in that: The other end of the refrigerant filling flow path is connected to one end of the flow meter, and the one end of the refrigerant discharge flow path is connected to the other end of the flow meter; The refrigerant regulating flow path also includes: A refrigerant filling bypass is connected in parallel with the flow meter and the second switch, and a bypass switch is provided on the refrigerant filling bypass to control the on and off of the refrigerant filling bypass.

7. The refrigerant conditioning system according to any one of claims 3 to 6, characterized in that: The refrigerant regulating flow path also includes: a first branch, one end of which is connected to the flow meter; A second branch, wherein the second branch is connected in parallel with the first branch, and one end of the second branch is connected to the flow meter.

8. The refrigerant conditioning system according to claim 7, characterized in that: The first branch is provided with a first branch switch, and the second branch is provided with a second branch switch.

9. The refrigerant conditioning system according to claim 8, characterized in that: The first branch includes a first sub-branch and a second sub-branch connected to each other, the first branch switch includes a first sub-switch and a second sub-switch, the first sub-switch is arranged on the first sub-branch, and the second sub-switch is arranged on the second sub-branch; The refrigerant regulating flow path also includes: a third branch, the third branch being connected in parallel with the flow meter and the second sub-switch, and the third branch being provided with a third branch switch; A fourth branch, the fourth branch is connected in parallel with the third branch, and a fourth branch switch is provided on the fourth branch.

10. A refrigerant adjustment method for an air conditioner, characterized in that: A refrigerant conditioning system according to any one of claims 1 to 9 is used.

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