Air conditioner energy efficiency debugging device and control method

Abstract

The invention relates to the technical field of air conditioners, in particular to an air conditioner energy efficiency debugging device and a control method, and aims to solve the problems that an existing air conditioner is tedious in debugging process and low in efficiency. In order to achieve the purpose, the debugging device comprises a first refrigerant pipeline communicated with a refrigerant pipeline of the air conditioner, and a first valve is arranged on the first refrigerant pipeline; the first end of the second refrigerant pipeline communicates with the refrigerant storage device, and the second end of the second refrigerant pipeline is connected to the portion, between the indoor heat exchanger and the first valve, of the first refrigerant pipeline. And a gas flow pressure device and a second valve are arranged on the gas circulation pipeline. The performance of the air conditioner reaches the best by adjusting the first valve and the refrigerant storage device, and then the specification of the capillary tube required by the air conditioner can be obtained from the airflow pressure device by arranging the second valve at the same opening degree and pressure as the first valve. The required refrigerant amount can be obtained by measuring the variable quantity of the weight of the refrigerant storage device and the initial refrigerant amount in the refrigerant pipeline.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular provides an energy efficiency debugging device and a control method for an air conditioner. Background Art

[0002] The energy efficiency test of existing air conditioners under various working conditions requires testing the capacity and power first, and then calculating the energy efficiency level. In order to ensure the best performance of the air conditioner, it is generally necessary to estimate a certain weight of refrigerant in the refrigerant system according to the compressor specification and debugging experience for charging (generally more refrigerant is charged during debugging), and then reduce and throttle the refrigerant through the manual switch stop valve to ensure that the compressor reaches the expected exhaust temperature. At the same time, the evaporator is guaranteed to have a certain degree of superheat, which means that the machine has reached the best state under the current refrigerant amount and throttling, but the capacity and performance of the air conditioner are not optimal. In order to optimize the capacity and performance of the air conditioner, it is necessary to repeatedly adjust the opening of the throttling device and the amount of refrigerant so that the air conditioner can reach the highest capacity and the best performance under the current machine configuration, and then determine various possible refrigerant amounts and throttling capillary specifications based on the test data, and then repeatedly evacuate the air conditioner, try to charge different amounts of refrigerant and replace possible throttling capillaries of various specifications one by one, and then the best refrigerant amount and throttling capillary specifications are obtained through testing.

[0003] This method is cumbersome, requires constant disassembly and assembly of the machine, wastes refrigerant and capillaries, has a long debugging cycle, and consumes manpower, material resources, and resources. Therefore, in the process of debugging the air conditioner, how to improve the debugging efficiency has become a technical problem that needs to be solved urgently in this field.

[0004] Accordingly, the art needs a new air conditioner energy efficiency debugging device and control method to solve the existing problems. Summary of the invention

[0005] The present invention aims to solve the above technical problem, that is, to solve the problem that the existing air conditioner debugging process is complicated and inefficient.

[0006] In a first aspect, the present invention provides a control method for an air conditioner energy efficiency debugging device, the debugging device comprising a shell and a first refrigerant pipeline, a second refrigerant pipeline and a gas circulation pipeline arranged in the shell, the first end of the first refrigerant pipeline is connected to an indoor heat exchanger after passing through the shell, the second end of the first refrigerant pipeline is connected to an outdoor heat exchanger after passing through the shell, and a first valve is arranged on the first refrigerant pipeline; the first end of the second refrigerant pipeline is communicated with a refrigerant storage device, and the second end of the second refrigerant pipeline is connected to the first refrigerant pipeline between the indoor heat exchanger and the first valve; the first end of the gas circulation pipeline is connected to a gas source after passing through the shell, and the gas flow pipeline is connected to a gas source between the indoor heat exchanger and the first valve. An airflow pressure device and a second valve are provided on the gas circulation pipeline; the control method comprises: adjusting the performance parameters of the air conditioner by adjusting the opening of the first valve under a preset refrigerant quantity condition; adjusting the value of the preset refrigerant quantity by controlling the refrigerant storage device, and re-adjusting the performance parameters of the air conditioner; obtaining the value of the refrigerant quantity, the opening value of the first valve and the pressure value at the first valve when the performance parameters of the air conditioner reach an optimal value; obtaining the refrigerant flow of the first valve at the current opening value and pressure value through the airflow pressure device and the second valve; and obtaining the specifications of the capillary corresponding to the optimal value of the performance parameters of the air conditioner according to the refrigerant flow.

[0007] In the specific implementation of the above-mentioned control method for the air conditioner energy efficiency debugging device, the step of "obtaining the specifications of the capillary corresponding to when the performance parameters of the air conditioner reach the optimal value according to the refrigerant flow rate" further includes: determining the capillary length corresponding to different inner diameters according to the refrigerant flow rate and the preset capillary inner diameter.

[0008] In a specific implementation of the control method for the energy efficiency debugging device of the air conditioner, the second valve has the same inner diameter as the first valve, and the step of "obtaining the refrigerant flow of the first valve at the current opening value and pressure value through the airflow pressure device and the second valve" further includes: controlling the second valve to open to the same opening as the first valve; controlling the airflow pressure device to adjust the pressure value of the gas circulation pipeline to the same as the pressure value of the first refrigerant pipeline; obtaining the air flow of the second valve at the current opening through the airflow pressure device; and recording the value of the air flow as the refrigerant flow of the first valve at the current opening value and pressure value.

[0009] In a specific implementation of the control method for the energy efficiency debugging device of the air conditioner, a third valve is provided at the connection between the second refrigerant pipeline and the first refrigerant pipeline, and the third valve is a three-way valve. The step of "adjusting the value of the preset refrigerant amount by controlling the refrigerant storage device and re-adjusting the performance parameters of the air conditioner" further includes: obtaining the exhaust temperature T of the compressor; comparing T with the compressor target exhaust temperature T1; when T>T1, controlling the third valve to connect the second refrigerant pipeline with the first refrigerant pipeline, and controlling the refrigerant storage device to release refrigerant to the first refrigerant pipeline through the second refrigerant pipeline; and / or, when T<T1, controlling the third valve to connect the second refrigerant pipeline with the first refrigerant pipeline, and controlling the refrigerant storage device to absorb the refrigerant in the first refrigerant pipeline through the second refrigerant pipeline; and / or, when T=T1, controlling the third valve to disconnect the second refrigerant pipeline from the first refrigerant pipeline.

[0010] In the specific implementation of the control method for the energy efficiency debugging device of the air conditioner, the refrigerant storage device is connected to a weighing device, and the step of "obtaining the numerical value of the refrigerant amount when the performance parameter of the air conditioner reaches the optimal value, the opening value of the first valve and the pressure value at the first valve" further includes: obtaining the initial weight M0 of the refrigerant in the first refrigerant pipeline; obtaining the weight change ΔM of the refrigerant storage device; obtaining the actual weight M of the refrigerant amount when the performance parameter of the air conditioner reaches the optimal value based on the initial weight M0 of the refrigerant in the first refrigerant pipeline and the weight change ΔM of the refrigerant storage device.

[0011] In the specific implementation of the control method for the energy efficiency debugging device of the air conditioner, a first pressure sensor is arranged on the first refrigerant pipeline, and the step of "obtaining the value of the refrigerant amount when the performance parameter of the air conditioner reaches the optimal value, the opening value of the first valve and the pressure value at the first valve" also includes: obtaining the opening value of the first valve through the indication on the first valve; obtaining the pressure value at the first valve through the first pressure sensor.

[0012] In the specific implementation of the above-mentioned control method for the air conditioner energy efficiency debugging device, the step of "adjusting the performance parameters of the air conditioner by adjusting the opening of the first valve under the preset refrigerant quantity condition" further includes: obtaining the exhaust temperature T of the compressor; comparing T with the compressor target exhaust temperature T1; when T<T1, reducing the opening of the first valve; and / or, when T>T1, increasing the opening of the first valve.

[0013] In the specific implementation of the control method for the air conditioner energy efficiency debugging device, the refrigerant storage device is also connected to a third refrigerant pipeline, the other end of the third refrigerant pipeline is connected to the refrigerant source, a fourth valve is provided on the third refrigerant pipeline, and the refrigerant storage device is also connected to a second pressure sensor. The control method also includes: obtaining the pressure value F of the refrigerant in the refrigerant storage device; comparing F with the minimum pressure value F2 of the refrigerant in the refrigerant storage device; when F≤F2, controlling the fourth valve to open and allowing the refrigerant source to periodically input refrigerant to the refrigerant storage device at a first preset weight M1 each time, and recording the number of times the refrigerant is input until F>F2.

[0014] In the specific implementation of the control method for the air conditioner energy efficiency debugging device mentioned above, the second pressure sensor is connected to an alarm device, and the control method also includes: obtaining the pressure value F of the refrigerant in the refrigerant storage device; comparing F with the maximum pressure value F1 of the refrigerant in the refrigerant storage device; when F≥F1, controlling the alarm device to issue an alarm message, and controlling the fourth valve to open, and periodically discharging the refrigerant in the refrigerant storage device into the refrigerant source at a first preset weight M1 each time, and recording the number of times the refrigerant is discharged until F<F1.

[0015] The present invention also provides an energy efficiency debugging device for an air conditioner, and the debugging device can execute the control method for the energy efficiency debugging device for an air conditioner described in any one of the above technical solutions.

[0016] In the case of adopting the above technical solution, the present invention can improve the efficiency of the air conditioning debugging process. Specifically, after the first refrigerant pipeline of the present invention is connected to the refrigerant pipeline of the air conditioner, the performance of the air conditioner can be adjusted by adjusting the first valve on the first refrigerant pipeline. After the performance of the air conditioner is adjusted to the optimal performance under the currently preset refrigerant amount, the amount of refrigerant in the air conditioning system is adjusted by controlling the refrigerant storage device on the second refrigerant pipeline. At the same time, by measuring the initial amount of refrigerant in the air conditioning system in advance, combined with the change in the amount of refrigerant in the refrigerant storage device during the debugging process, the amount of refrigerant required by the air conditioning system at the optimal performance can be obtained.

[0017] When the air conditioner is debugged to the best performance, the pressure value in the first refrigerant pipeline and the opening value of the first valve are recorded. By setting the second valve to have the same opening as the first valve under the same pressure condition, the air flow value passing through the second valve at this time can be read from the airflow pressure device, thereby determining the capillary length corresponding to different inner diameters through the preset capillary inner diameter. The control method of the present invention is simple and convenient to operate, and does not require manual adjustment of the refrigerant amount in the air conditioning system, and the refrigerant amount and capillary specifications required for the best performance of the air conditioner can be obtained by constantly replacing capillaries of different specifications, thereby saving manpower and material resources and improving debugging efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0019] Figure 1 is a front axial view of the energy efficiency debugging device of the present invention;

[0020] Figure 2 is a rear axial view of the energy efficiency debugging device of the present invention;

[0021] Figure 3 It is a schematic diagram of the internal structure of the energy efficiency debugging device of the present invention;

[0022] Figure 4 is a top view of the energy efficiency debugging device of the present invention;

[0023] Figure 5 It is an overall flow chart of a control method for an air conditioner energy efficiency debugging device;

[0024] Figure 6 is a detailed flow chart of step S1;

[0025] Figure 7 is a detailed flow chart of step S2;

[0026] Figure 8 is a detailed flow chart of step S3;

[0027] Fig. 9 is a detailed flow chart of step S4;

[0028] Fig.10 is a detailed flow chart of step S5;

[0029] Fig.11 It is a flow chart of a second implementation method of a control method for an air conditioner energy efficiency debugging device.

[0030] List of reference numerals:

[0031] 1-Energy efficiency debugging device;

[0032] 11-housing; 111-first control screen; 112-second control screen;

[0033] 12-first refrigerant pipeline; 121-first valve; 122-first end; 123-second end;

[0034] 13- second refrigerant pipeline; 131- third valve;

[0035] 14-gas circulation pipeline; 141-air flow pressure device; 142-second valve;

[0036] 15-Refrigerent storage device;

[0037] 16-Weighing device (small electronic scale);

[0038] 17-third refrigerant pipeline; 171-fourth valve;

[0039] 18-Computer board. DETAILED DESCRIPTION

[0040] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make adjustments as needed to adapt to specific applications. For example, although the weighing device in the specification is described by taking a small electronic scale as an example, the present invention can obviously adopt various other weighing devices.

[0041] It should be noted that in the description of the present invention, the terms "left", "right", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] In addition, it should be noted that in the description of the present invention, 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 those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] First, the debugging process of the existing air conditioner is introduced.

[0044] In the debugging process of the existing air conditioner, it is generally necessary to estimate a certain weight of refrigerant in the refrigerant system according to the compressor specification and debugging experience for filling (generally, the refrigerant filling amount will be more during debugging), and then reduce the refrigerant and throttle the operation through the manual switch stop valve to ensure that the compressor reaches the expected exhaust temperature. At the same time, it is ensured that the evaporator has a certain degree of superheat, which means that the machine has reached the best state under the current refrigerant amount and throttling, but the capacity and performance of the air conditioner are not optimal. In order to optimize the capacity and performance of the air conditioner, it is necessary to repeatedly adjust the opening of the throttling device and the refrigerant amount, so that the air conditioner can reach the highest capacity and the best performance under the current machine configuration, and then determine various possible refrigerant amounts and throttling capillary specifications according to test data, and then repeatedly evacuate the air conditioner, try to fill different amounts of refrigerant and replace possible throttling capillaries of various specifications one by one, and then get the best refrigerant amount and throttling capillary specifications through experiments. This method is cumbersome, and the machine is constantly disassembled and assembled, which wastes refrigerant and capillaries, has a long debugging cycle, and consumes manpower, material resources, and resources. Therefore, the present invention proposes the following technical solutions.

[0045] like Figure 1-Figure 4 As shown, in order to solve the problem that the existing air conditioner debugging process is cumbersome and inefficient, the air conditioner energy efficiency debugging device 1 of the present invention includes a housing 11, and the housing 11 is provided with a first control screen 111 and a second control screen 112. When the housing 11 is opened, a computer board 18 is provided inside the housing 11, and the first control screen 111 and the second control screen 112 are connected to the computer board 18 for communication. The housing 11 also includes:

[0046] The first refrigerant pipeline 12, the first end 122 of the first refrigerant pipeline 12 passes through the shell 11 and is connected to the indoor heat exchanger, and the second end 123 passes through the shell 11 and is connected to the outdoor heat exchanger, thereby realizing the connection between the energy efficiency debugging device 1 and the air conditioning system. A first valve 121 and a first pressure sensor (not shown in the figure) are also provided on the first refrigerant pipeline 12. The first valve 121 is used to adjust the flow rate of the refrigerant in the first refrigerant pipeline 12, and the first pressure sensor is used to obtain the pressure value in the first refrigerant pipeline 12. The first valve 121 and the first pressure sensor are connected to the computer board 18 for communication.

[0047] A second refrigerant pipeline 13 and a refrigerant storage device 15, one end of the second refrigerant pipeline 13 is connected to the refrigerant storage device 15, and the other end is connected to the first refrigerant pipeline 12 between the indoor heat exchanger and the first valve 121. A third valve 131 is provided at the connection between the second refrigerant pipeline 13 and the first refrigerant pipeline 12. The third valve 131 is a three-way valve. The third valve 131 can control the on-off of the second refrigerant pipeline 13 and the first refrigerant pipeline 12, thereby controlling whether the refrigerant storage device 15 releases or absorbs refrigerant to the first refrigerant pipeline 12 and the air-conditioning system through the second refrigerant pipeline 13. The third valve 131 is communicatively connected to the computer board 18.

[0048] The small electronic scale 16 is disposed below the refrigerant storage device 15 and is used to measure the weight of the refrigerant storage device 15 . The small electronic scale 16 is communicatively connected to the computer board 18 .

[0049] A gas circulation pipeline 14, one end of which passes through the shell 11 and is connected to the gas source. An airflow pressure device 141 and a second valve 142 are provided on the gas circulation pipeline 14. The second valve 142 has the same inner diameter as the first valve 121 and is used to simulate the refrigerant flow rate that can pass through when the opening degree is the same as that of the first valve 121. The airflow pressure device 141 can adjust the pressure in the gas circulation pipeline 14 and obtain the air flow value passing through the second valve 142 under the current pressure. The airflow pressure device 141 and the second valve 142 are communicatively connected to the computer board 18.

[0050] like Figure 5-Figure 10 As shown, the control method for the air conditioner energy efficiency debugging device 1 includes:

[0051] S1. Under a preset refrigerant quantity condition, the performance parameters of the air conditioner are adjusted by adjusting the opening of the first valve 121;

[0052] S2, adjusting the value of the preset refrigerant amount by controlling the refrigerant storage device 15, and re-adjusting the performance parameters of the air conditioner;

[0053] S3, obtaining the value of the amount of refrigerant, the opening value of the first valve 121, and the pressure value at the first valve 121 when the performance parameter of the air conditioner reaches the optimal value;

[0054] S4, obtaining the refrigerant flow rate of the first valve 121 at the current opening value and pressure value through the airflow pressure device 141 and the second valve 142;

[0055] S5. Obtain the specifications of the capillary tube corresponding to the optimal value of the performance parameter of the air conditioner according to the refrigerant flow rate.

[0056] In the above steps, step S1 further comprises:

[0057] S11, obtaining the exhaust temperature T of the compressor;

[0058] S12, comparing T with the compressor target exhaust temperature T1;

[0059] S13, when T<T1, reducing the opening of the first valve 121;

[0060] S14 , when T>T1 , increase the opening of the first valve 121 .

[0061] Step S2 further comprises:

[0062] S21, obtaining the exhaust temperature T of the compressor;

[0063] S22, comparing T with the compressor target exhaust temperature T1;

[0064] S23, when T>T1, control the third valve 131 to connect the second refrigerant pipeline 13 with the first refrigerant pipeline 12, and control the refrigerant storage device 15 to release refrigerant to the first refrigerant pipeline 12 through the second refrigerant pipeline 13;

[0065] S24, when T<T1, control the third valve 131 to connect the second refrigerant pipeline 13 with the first refrigerant pipeline 12, and control the refrigerant storage device 15 to absorb the refrigerant in the first refrigerant pipeline 12 through the second refrigerant pipeline 13;

[0066] S25 , when T= T1 , controlling the third valve 131 to disconnect the second refrigerant pipeline 13 from the first refrigerant pipeline 12 .

[0067] Step S3 further comprises:

[0068] S31, obtaining the initial weight M0 of the refrigerant in the air-conditioning system;

[0069] S32, obtaining a weight change ΔM of the refrigerant storage device 15;

[0070] S33 , obtaining the actual weight M of the refrigerant when the performance parameter of the air conditioner reaches the optimal value according to the initial weight M0 of the refrigerant in the first refrigerant pipeline 12 and the weight change ΔM of the refrigerant storage device 15 .

[0071] S34, obtaining the opening value of the first valve 121 through the indication on the first valve 121;

[0072] S35 . Obtain the pressure value at the first valve 121 through the first pressure sensor.

[0073] Step S4 further comprises:

[0074] S41, controlling the second valve 142 to open to the same opening as the first valve 121;

[0075] S42, controlling the air flow pressure device 141 to adjust the pressure value of the gas flow pipeline 14 to be the same as the pressure value of the first refrigerant pipeline 12;

[0076] S43, obtaining the air flow rate of the second valve 142 at the current opening through the airflow pressure device 141;

[0077] S44, recording the value of the air flow as the refrigerant flow of the first valve at the current opening value and pressure value.

[0078] Step S5 further comprises:

[0079] S51. Determine the capillary length corresponding to different inner diameters according to the refrigerant flow rate and the preset capillary inner diameter.

[0080] In the process of debugging the air conditioner, firstly, a certain amount of refrigerant is charged into the air conditioning system, that is, the preset refrigerant quantity condition mentioned in the above step S1. At this time, the exhaust temperature T of the compressor is obtained while adjusting the opening of the first valve 121, and T is compared with the target exhaust temperature T1 of the compressor. When T>T1, it means that the exhaust temperature of the compressor is relatively high at this time. The flow rate of the refrigerant can be increased by increasing the opening of the first valve 121, and the exhaust temperature of the compressor can be reduced by improving the heat exchange efficiency of the refrigerant. On the contrary, when T<T1, it means that the exhaust temperature of the compressor is relatively low at this time. The flow rate of the refrigerant can be reduced by reducing the opening of the first valve 121, thereby balancing the refrigeration performance of the system by reducing the pressure difference between the condenser and the evaporator.

[0081] Through the above steps, the performance of the air conditioner can be adjusted to the best under the working condition of the current preset refrigerant amount. However, since the preset refrigerant amount is not necessarily the most suitable refrigerant amount, the exhaust temperature of the compressor may not reach the target exhaust temperature T1. Therefore, it is necessary to adjust the value of the preset refrigerant amount to further improve the performance of the air conditioner. In this process, continue to obtain the exhaust temperature T of the compressor and compare T with the compressor target exhaust temperature T1. When T>T1, it means that the exhaust temperature of the compressor is relatively high at this time, and the third valve 131 is controlled to connect the second refrigerant pipeline 13 with the first refrigerant pipeline 12, and the refrigerant storage device 15 is controlled to release refrigerant to the first refrigerant pipeline 12 through the second refrigerant pipeline 13 to absorb excess heat, thereby achieving the purpose of reducing the exhaust temperature of the compressor. On the contrary, when T<T1, it means that the exhaust temperature of the compressor is relatively low at this time. The third valve 131 is controlled to connect the second refrigerant pipeline 13 with the first refrigerant pipeline 12, and the refrigerant storage device 15 is controlled to absorb the refrigerant in the first refrigerant pipeline 12 through the second refrigerant pipeline 13 to avoid excessive absorption of heat by the refrigerant, thereby increasing the exhaust temperature of the compressor.

[0082] In addition, when T=T1, it means that the performance of the air conditioner is the best at this time, and the third valve 131 is controlled to disconnect the second refrigerant pipeline 13 from the first refrigerant pipeline 12 to maintain the refrigerant amount in the air conditioning system at this time. Next, it is necessary to obtain the refrigerant amount in the air conditioning system at this time, the opening degree of the first valve 121, and the pressure in the first refrigerant pipeline 12.

[0083] As mentioned above, before debugging the air conditioner, a certain amount of refrigerant must be charged into the air conditioning system. Before injecting the refrigerant into the air conditioner, the refrigerant can be weighed to obtain the initial weight M0 of the refrigerant in the air conditioning system. At the same time, the initial weight M0 of the refrigerant storage device 15 can be weighed by a small electronic scale 16. a During the debugging process, the weight of the refrigerant storage device 15 will change due to the change in the amount of refrigerant. When the debugging is completed, the final weight M of the refrigerant storage device 15 is weighed by a small electronic scale 16. b , through M a and M b The weight change ΔM of the refrigerant storage device 15 is calculated, and ΔM is also the change in the refrigerant in the air conditioning system. Therefore, the refrigerant amount M of the air conditioning system at the best performance can be calculated based on M0 and ΔM. Next, the method for obtaining the capillary specifications of the air conditioner at the best performance is introduced.

[0084] The opening value of the first valve 121 can be obtained through the indication on the first valve 121, and the pressure value in the first refrigerant pipeline 12 can be obtained through the first pressure sensor. At this time, the second valve 142 is controlled to open to the same opening as the first valve 121, and the airflow pressure device 141 is controlled to adjust the pressure value of the gas circulation pipeline 14 to the same pressure value as the first refrigerant pipeline 12. The air flow rate of the second valve 142 at the current opening, that is, the refrigerant flow rate that can pass through the first valve 121, can be obtained through the airflow pressure device 141. Then, the length of the capillary corresponding to different inner diameters can be determined according to the refrigerant flow rate and the preset capillary inner diameter.

[0085] It is worth mentioning that, since the first control screen 111, the second control screen 112, the first valve 121, the first pressure sensor, the third valve 131, the small electronic scale 16, the airflow pressure device 141 and the second valve 142 are all connected to the computer board 18 for communication, the data collected during the above debugging process can be displayed on the first control screen 111 and the second control screen 112. At the same time, those skilled in the art can also control the first valve 121, the second valve 142, the third valve 131 and the airflow pressure device 141 through the first control screen 111 and the second control screen 112 by means of a touch screen, and these implementations are all within the protection scope of the present invention.

[0086] In addition, the aforementioned adjustment of the air conditioner performance according to the exhaust temperature of the compressor is only an exemplary description for the convenience of description. It can be understood by those skilled in the art that in the process of debugging the air conditioner, other performance parameters need to be detected, such as the superheat of the evaporator and the subcooling of the condenser, etc. The debugging principle is similar to the process of the compressor exhaust temperature, and the present invention will not elaborate on them one by one.

[0087] Refer to the following Figure 3 , Fig.11 , a second implementation of the control method for the air conditioner energy efficiency debugging device 1 of the present invention is introduced.

[0088] In the second embodiment, the refrigerant storage device 15 is further connected to a third refrigerant pipeline 17, one end of the third refrigerant pipeline 17 is connected to the refrigerant storage device 15, and the other end is connected to the refrigerant source, and a fourth valve 171 is provided on the third refrigerant pipeline 17 to control whether to add or absorb refrigerant into the refrigerant storage device 15. The refrigerant storage device 15 is also connected to a second pressure sensor (not shown in the figure), and the second pressure sensor is connected to an alarm device (not shown in the figure).

[0089] The control method for the air conditioner energy efficiency debugging device 1 includes:

[0090] S01, obtaining the pressure value F of the refrigerant in the refrigerant storage device 15;

[0091] S02, comparing F with the maximum pressure value F1 and the minimum pressure value F2 of the refrigerant in the refrigerant storage device 15;

[0092] S03, when F≥F1, the alarm device is controlled to send out an alarm message, and the fourth valve 171 is controlled to open, and the refrigerant in the refrigerant storage device is periodically discharged into the refrigerant source at a first preset weight M1 each time, and the number of times the refrigerant is discharged is recorded until F<F1;

[0093] S04. When F≤F2, the fourth valve 171 is controlled to open and the refrigerant source periodically inputs refrigerant into the refrigerant storage device 15 at a first preset weight M1 each time, and the number of times the refrigerant is input is recorded until F>F2.

[0094] In the process of adjusting the amount of refrigerant in the system through the refrigerant storage device 15, it is also necessary to detect the amount of refrigerant in the refrigerant storage device 15. When the refrigerant in the refrigerant storage device 15 is too little, the refrigerant is added to the refrigerant storage device 15 through the refrigerant source. When the refrigerant in the refrigerant storage device 15 is too much, the refrigerant in the refrigerant storage device 15 can be drawn out and an alarm is issued. Specifically, firstly, the pressure value F of the refrigerant in the refrigerant storage device 15 is obtained by the second pressure sensor, and then F is compared with the maximum pressure value F1 and the minimum pressure value F2 of the refrigerant in the refrigerant storage device 15. When F≥F1, the alarm device is controlled to send an alarm message, and the fourth valve 171 is controlled to open, and the refrigerant in the refrigerant storage device is periodically discharged into the refrigerant source at the first preset weight M1 each time, and the number of times the refrigerant is discharged n is recorded until F<F1; when F≤F2, the fourth valve 171 is controlled to open and the refrigerant source is periodically input into the refrigerant storage device 15 at the first preset weight M1 each time, and the number of times the refrigerant is input is recorded until F>F2. In this way, the amount of refrigerant discharged / input can be calculated by calculating n×M1, and the amount of refrigerant change in the refrigerant storage device 15 can be obtained by combining the difference between the final amount of refrigerant in the refrigerant storage device 15 and the initial amount of refrigerant.

[0095] It should be noted that the above-mentioned implementation mode is only used to illustrate the principle of the present invention and is not intended to limit the scope of protection of the present invention. Without departing from the principle of the present invention, those skilled in the art can adjust the above-mentioned structure so that the present invention can be applied to more specific application scenarios.

[0096] Those skilled in the art can understand that the energy efficiency debugging device mentioned above also includes some other well-known structures, such as a processor, a controller, a memory, etc., wherein the memory includes but is not limited to a random access memory, a flash memory, a read-only memory, a programmable read-only memory, a volatile memory, a non-volatile memory, a serial memory, a parallel memory or a register, etc., and the processor includes but is not limited to a CPLD / FPGA, a DSP, an ARM processor, a MIPS processor, etc. In order to unnecessarily obscure the embodiments of the present disclosure, these well-known structures are not shown in the drawings.

[0097] Finally, the valve also provides an energy efficiency debugging device 1 for an air conditioner, and the debugging device can execute the control method for the energy efficiency debugging device 1 for an air conditioner according to any one of the above technical solutions.

[0098] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A control method for an air conditioner energy efficiency debugging device, characterized in that: The debugging device includes a shell and a first refrigerant pipeline, a second refrigerant pipeline and a gas circulation pipeline arranged in the shell. The first end of the first refrigerant pipeline passes through the shell and is connected to the indoor heat exchanger, and the second end of the first refrigerant pipeline passes through the shell and is connected to the outdoor heat exchanger. A first valve is provided on the first refrigerant pipeline; The first end of the second refrigerant pipeline is connected to the refrigerant storage device, and the second end of the second refrigerant pipeline is connected to the first refrigerant pipeline between the indoor heat exchanger and the first valve; The first end of the gas circulation pipeline is connected to the gas source after passing through the shell, and a gas flow pressure device and a second valve are arranged on the gas circulation pipeline; The control method comprises: Under a preset refrigerant quantity condition, the performance parameter of the air conditioner is adjusted by adjusting the opening of the first valve; By controlling the refrigerant storage device to adjust the value of the preset refrigerant amount, and readjust the performance parameters of the air conditioner; Obtaining a value of the amount of refrigerant, a value of the opening of the first valve, and a value of the pressure at the first valve when the performance parameter of the air conditioner reaches an optimal value; Obtaining the refrigerant flow rate of the first valve at the current opening value and pressure value through the airflow pressure device and the second valve; The specifications of the capillary tube corresponding to the optimal value of the performance parameter of the air conditioner are obtained according to the refrigerant flow rate.

2. The control method for the air conditioner energy efficiency debugging device according to claim 1, characterized in that: The step of "obtaining the specifications of the capillary tube corresponding to when the performance parameter of the air conditioner reaches the optimal value according to the refrigerant flow rate" further includes: The capillary lengths corresponding to different inner diameters are determined according to the refrigerant flow rate and the preset capillary inner diameter.

3. The control method for the air conditioner energy efficiency debugging device according to claim 1, characterized in that: The second valve has the same inner diameter as the first valve, and the step of "obtaining the refrigerant flow rate of the first valve at the current opening value and pressure value through the airflow pressure device and the second valve" further includes: Controlling the second valve to open to the same opening as the first valve; Controlling the air flow pressure device to adjust the pressure value of the gas circulation pipeline to be the same as the pressure value of the first refrigerant pipeline; Acquiring the air flow rate of the second valve at the current opening by the air flow pressure device; The value of the air flow is recorded as the refrigerant flow of the first valve at the current opening value and pressure value.

4. The control method for the air conditioner energy efficiency debugging device according to claim 1, characterized in that: A third valve is provided at the connection between the second refrigerant pipeline and the first refrigerant pipeline, and the third valve is a three-way valve. The step of "adjusting the value of the preset refrigerant amount by controlling the refrigerant storage device and re-adjusting the performance parameters of the air conditioner" further includes: Get the exhaust temperature T of the compressor; Compare T with the compressor target exhaust temperature T1; When T>T1, the third valve is controlled to connect the second refrigerant pipeline with the first refrigerant pipeline, and the refrigerant storage device is controlled to release refrigerant to the first refrigerant pipeline through the second refrigerant pipeline; and / or, When T<T1, the third valve is controlled to connect the second refrigerant pipeline with the first refrigerant pipeline, and the refrigerant storage device is controlled to absorb the refrigerant in the first refrigerant pipeline through the second refrigerant pipeline; and / or, When T= T1 , the third valve is controlled to disconnect the second refrigerant pipeline from the first refrigerant pipeline.

5. The control method for the air conditioner energy efficiency debugging device according to claim 4, characterized in that: The refrigerant storage device is connected to a weighing device, and the step of "obtaining the value of the refrigerant amount when the performance parameter of the air conditioner reaches the optimal value, the opening value of the first valve and the pressure value at the first valve" further includes: Obtaining the initial weight M0 of the refrigerant in the air-conditioning system; Obtaining a weight change ΔM of the refrigerant storage device; The actual weight M of the refrigerant when the performance parameter of the air conditioner reaches an optimal value is obtained according to the initial weight M0 of the refrigerant in the first refrigerant pipeline and the weight change ΔM of the refrigerant storage device.

6. The control method for the air conditioner energy efficiency debugging device according to claim 5, characterized in that: The first refrigerant pipeline is provided with a first pressure sensor, and the step of "obtaining the value of the refrigerant amount when the performance parameter of the air conditioner reaches the optimal value, the opening value of the first valve and the pressure value at the first valve" also includes: Obtaining the opening value of the first valve through the indication on the first valve; The pressure value at the first valve is obtained through the first pressure sensor.

7. The control method for the air conditioner energy efficiency debugging device according to claim 1, characterized in that: The step of "adjusting the performance parameters of the air conditioner by adjusting the opening of the first valve under a preset refrigerant quantity condition" further includes: Get the exhaust temperature T of the compressor; Compare T with the compressor target exhaust temperature T1; When T<T1, reducing the opening of the first valve; and / or, When T>T1, the opening of the first valve is increased.

8. The control method for the air conditioner energy efficiency debugging device according to claim 1, characterized in that: The refrigerant storage device is also connected to a third refrigerant pipeline, the other end of the third refrigerant pipeline is connected to a refrigerant source, a fourth valve is provided on the third refrigerant pipeline, and the refrigerant storage device is also connected to a second pressure sensor. The control method further includes: Obtaining a pressure value F of the refrigerant in the refrigerant storage device; Comparing F with the minimum pressure value F2 of the refrigerant in the refrigerant storage device; When F≤F2, the fourth valve is controlled to open and the refrigerant source is made to periodically input refrigerant into the refrigerant storage device at a first preset weight M1 each time, and the number of times the refrigerant is input is recorded until F>F2.

9. The control method for the air conditioner energy efficiency debugging device according to claim 8, characterized in that: The second pressure sensor is connected to an alarm device, and the control method further includes: Obtaining a pressure value F of the refrigerant in the refrigerant storage device; Compare F with the maximum pressure value F1 of the refrigerant in the refrigerant storage device; When F≥F1, the alarm device is controlled to send out an alarm message, and the fourth valve is controlled to open, and the refrigerant in the refrigerant storage device is periodically discharged into the refrigerant source at a first preset weight M1 each time, and the number of times the refrigerant is discharged is recorded until F<F1.

10. An energy efficiency debugging device for an air conditioner, characterized in that: The debugging device can execute the control method for an air conditioner energy efficiency debugging device according to any one of claims 1 to 9.

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