Air conditioner and manufacturing method thereof

Abstract

The present invention provides an air conditioner and a manufacturing method thereof. The air conditioner includes a compression refrigeration cycle system partially located within an outdoor unit of the air conditioner. The manufacturing method comprises: installing a silencer in the fluid path of the compression refrigeration cycle system within the outdoor unit; detecting the peak noise frequency corresponding to peak noise occurring within the outdoor unit when the compressor of the compression refrigeration cycle system is operating; determining a refrigerant ratio to be filled into the compression refrigeration cycle system based on the peak noise frequency; and filling the refrigerant with the determined ratio into the compression refrigeration cycle system. The present invention has the advantage of specifically reducing the problem of high narrowband frequency noise occurring within 500 Hz, thereby improving the user experience.

Description

Technical Field

[0001] The present invention relates to the field of air conditioning, in particular to an air conditioner and a manufacturing method thereof. Background Art

[0002] In recent years, with the continuous advancement of technology and the continuous improvement of living standards, users have also placed higher demands on the comfort of air conditioners. Existing air conditioners, especially those using fourth-generation refrigerants such as R1234yf or R1234ze, often experience noticeable narrowband noise within 500Hz (bandwidth of approximately 30Hz) during operation. This problem often leads to user complaints and seriously damages brand reputation, and thus needs improvement. Summary of the Invention

[0003] In order to solve the above problems, an embodiment of the present invention provides an air conditioner and a manufacturing method thereof. By detecting the peak noise in the outdoor unit when the compressor in the compression refrigeration cycle system is working, the ratio scheme of the refrigerant to be filled is determined according to the peak noise, and then the refrigerant with the determined ratio scheme is filled into the compression refrigeration cycle system. This can specifically reduce the problem of high narrowband frequency noise within 500Hz and improve the user experience.

[0004] According to a first aspect of the present invention, there is provided a method for manufacturing an air conditioner, the air conditioner including a compression refrigeration cycle system partially located within an outdoor unit of the air conditioner, the method comprising:

[0005] Silencer installation steps: Install the silencer into the fluid path of the compression refrigeration cycle system in the outdoor unit;

[0006] Peak noise detection step: Detect the peak noise frequency corresponding to the peak noise generated in the outdoor unit when the compressor in the compression refrigeration cycle system is operating. Peak noise is defined as: for the operating noise generated by the compressor in the range of (0 Hz, 500 Hz) during operation, if its maximum peak intensity is at least 20% greater than its average intensity, the operating noise corresponding to the maximum peak intensity is the peak noise;

[0007] Refrigerant ratio determination step: determining the ratio of the refrigerant to be charged into the compression refrigeration cycle system according to the peak noise frequency;

[0008] Refrigerant charging steps: Charge the refrigerant with the determined ratio into the compression refrigeration cycle system.

[0009] Optionally, in the refrigerant ratio determining step, the refrigerant to be filled in the compression refrigeration cycle system is selected to be composed of one or both of refrigerant R1234yf and refrigerant R1234ze.

[0010] Optionally, in the determined refrigerant ratio scheme to be charged, the higher the peak noise frequency is, the lower the proportion of refrigerant R1234yf is from 100% to 0%, while the proportion of refrigerant R1234ze is increased from 0% to 100%.

[0011] Optionally, in the refrigerant ratio determination step, the ratio of the refrigerant to be charged is determined according to the following rules:

[0012] If the peak noise frequency is in the range of (0 Hz, 282 Hz], the refrigerant to be charged is 100% R1234yf;

[0013] If the peak noise frequency is in the range of (282Hz, 286Hz], the refrigerant to be charged is a mixed refrigerant consisting of 90% R1234yf and 10% R1234ze;

[0014] If the peak noise frequency is in the range of (286Hz, 294Hz], the refrigerant to be charged is a mixed refrigerant consisting of 70% R1234yf and 30% R1234ze;

[0015] If the peak noise frequency is in the range of (294Hz, 298Hz], the refrigerant to be charged is a mixed refrigerant consisting of 50% R1234yf and 50% R1234ze;

[0016] If the peak noise frequency is in the range of (298Hz, 306Hz], the refrigerant to be charged is a mixed refrigerant consisting of 30% R1234yf and 70% R1234ze;

[0017] If the peak noise frequency is in the range of (306Hz, 310Hz], the refrigerant to be charged is a mixed refrigerant consisting of 10% R1234yf and 90% R1234ze;

[0018] If the peak noise frequency is in the range of (310 Hz, 500 Hz], the refrigerant to be charged is a refrigerant composed of 100% R1234ze.

[0019] Optionally, the manufacturing method further includes a compressor working program setting step: setting the compressor working program so that the exhaust temperature of the compressor is set to 60°C to 70°C and the exhaust pressure is set to 2.8Mpa to 3.2Mpa.

[0020] Optionally, in the silencer installation step, the silencer is selected to be a resonance chamber silencer, which is connected between the exhaust end of the compressor and any heat exchanger of the compression refrigeration cycle system.

[0021] Optionally, the resonance chamber muffler includes:

[0022] an expansion tube defining an expansion cavity therein;

[0023] a resonance box, disposed above the expansion tube and defining a resonance cavity therein; and

[0024] The connecting tube is arranged between the resonance box and the expansion tube and is used for connecting the resonance cavity and the expansion cavity.

[0025] According to a second aspect of the present invention, the present invention provides an air conditioner, which is manufactured by any one of the above manufacturing methods.

[0026] According to a third aspect of the present invention, the present invention provides an air conditioner, comprising:

[0027] a compression refrigeration cycle system partially located within an outdoor unit of an air conditioner, the compression refrigeration cycle system being filled with a refrigerant consisting of one or both of refrigerant R1234yf and refrigerant R1234ze, wherein a peak noise generated within the outdoor unit when a compressor in the compression refrigeration cycle system is operating has a peak noise frequency; and

[0028] The resonance chamber muffler is connected between the exhaust end of the compressor and any heat exchanger of the compression refrigeration cycle system;

[0029] The compression refrigeration cycle system is configured such that:

[0030] The peak noise frequency is within the first frequency range, and the proportion of refrigerant R1234yf in the refrigerant charged in the compression refrigeration cycle system is greater than or equal to the proportion of refrigerant R1234ze; or

[0031] The peak noise frequency is within the second frequency range, and in the refrigerant charged in the compression refrigeration cycle system, the proportion of refrigerant R1234yf is less than the proportion of refrigerant R1234ze; and

[0032] The frequency value in the first frequency interval is smaller than the frequency value in the second frequency interval.

[0033] Optionally, the first frequency interval is (0 Hz, 298 Hz]; and

[0034] The second frequency interval is (298Hz, 500Hz].

[0035] Optionally, the compression refrigeration cycle system is further configured such that:

[0036] The peak noise frequency is in the range of (0 Hz, 282 Hz), and the refrigerant filled in the compression refrigeration cycle is 100% refrigerant R1234yf; or

[0037] The peak noise frequency is in the range of (282 Hz, 286 Hz), and the refrigerant charged in the compression refrigeration cycle system is a mixed refrigerant consisting of 90% refrigerant R1234yf and 10% refrigerant R1234ze; or

[0038] The peak noise frequency is in the range of (286 Hz, 294 Hz), and the refrigerant charged in the compression refrigeration cycle system is a mixed refrigerant consisting of 70% refrigerant R1234yf and 30% refrigerant R1234ze; or

[0039] The peak noise frequency is in the range of (294 Hz, 298 Hz), and the refrigerant charged in the compression refrigeration cycle is a mixed refrigerant consisting of 50% refrigerant R1234yf and 50% refrigerant R1234ze; or

[0040] The peak noise frequency is in the range of (298 Hz, 306 Hz), and the refrigerant charged in the compression refrigeration cycle is a mixed refrigerant consisting of 30% refrigerant R1234yf and 70% refrigerant R1234ze; or

[0041] The peak noise frequency is in the range of (306 Hz, 310 Hz), and the refrigerant charged in the compression refrigeration cycle is a mixed refrigerant consisting of 10% refrigerant R1234yf and 90% refrigerant R1234ze; or

[0042] The peak noise frequency is in the range of (310Hz, 500Hz], and the refrigerant filled in the compression refrigeration cycle system is 100% refrigerant R1234ze.

[0043] The present invention's method for manufacturing an air conditioner involves first installing a silencer into the fluid path of a compression refrigeration cycle within an outdoor unit. The method then detects the peak noise frequency within the outdoor unit while the compressor is operating. Based on the peak noise frequency, the refrigerant ratio to be filled into the compression refrigeration cycle is determined. Finally, the refrigerant with the determined ratio is filled into the compression refrigeration cycle. This innovative method, by specifically determining the refrigerant ratio based on the peak noise frequency and then filling the compression refrigeration cycle with a mixed refrigerant according to the ratio, significantly reduces the decibel level of narrowband frequency noise within 500 Hz during compressor operation, thereby improving the user experience.

[0044] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0046] Figure 1 is a structural principle diagram of an air conditioner according to one embodiment of the present invention;

[0047] Figure 2 2. It is a schematic structural diagram of a resonance cavity muffler according to an embodiment of the present invention;

[0048] Figure 3 is a graph showing the sound transmission loss of a resonant cavity muffler under different refrigerant ratio schemes according to an embodiment of the present invention;

[0049] Figure 4 is a flow chart of a method for manufacturing an air conditioner according to one embodiment of the present invention;

[0050] Figure 5 is a flow chart of peak noise detection according to one embodiment of the present invention. DETAILED DESCRIPTION

[0051] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0052] The embodiment of the present invention first provides an air conditioner 10. Figure 1 This is a schematic diagram of the structure of an air conditioner 10 according to an embodiment of the present invention, referring to Figure 1 The air conditioner 10 may be a split-type air conditioner 10. The split-type air conditioner 10 may generally include an indoor unit 110, an outdoor unit 120 and a compression refrigeration cycle system 200. The compression refrigeration cycle system 200 is partially located in the outdoor unit 120 of the air conditioner 10 and includes at least a compressor 210, a heat exchanger 220, a refrigerant pipeline 230 and other components. Since the working principle of the compression refrigeration cycle system 200 is well known to those skilled in the art, it will not be described here in detail.

[0053] The air conditioner 10 of the present invention may further include a muffler, which may be a resonant cavity muffler 300 connected between the exhaust port of the compressor 210 and any heat exchanger in the compression refrigeration cycle 200. Practical experimental testing has shown that the resonant cavity muffler 300 has a significant muffler effect on narrowband frequency noise within 500 Hz, significantly reducing the decibel level of the outdoor unit 120's operating noise.

[0054] Figure 2 is a schematic structural diagram of a resonance cavity muffler 300 according to an embodiment of the present invention, referring to Figure 2 The resonance chamber muffler 300 may include an expansion tube 310, a resonance box 320, and a connecting tube 330. The expansion tube 310 defines an expansion chamber. The resonance box 320 is disposed above the expansion tube 310 and defines a resonance chamber therein. The connecting tube 330 is disposed between the resonance box 320 and the expansion tube 310 to connect the resonance chamber and the expansion chamber. To enable the resonance chamber muffler 300 to be installed in the compression refrigeration cycle system 200, the expansion tube 310 of this embodiment is further connected to connecting tubes 311 at both ends. The dimensions of the connecting tubes 311 are adapted to those of the refrigerant pipeline 230, and the end of the connecting tube 311 away from the expansion tube 310 can be interference-fitted into the refrigerant pipeline 230.

[0055] It should be noted that in the compression refrigeration cycle system 200 of this embodiment, the peak noise generated in the outdoor unit 120 when the compressor 210 is working has a peak noise frequency, and the refrigerant filled in the refrigerant pipeline 230 is composed of one or both of refrigerant R1234yf and refrigerant R1234ze.

[0056] When the inventor studied the muffler effect of the resonant cavity muffler 300, he unexpectedly found that the type of refrigerant used in the refrigerant pipeline 230 also has a significant impact on its muffler effect. By calculating the transmission loss of the muffler through the CAE acoustic simulation analysis platform, he obtained Figure 3 The sound transmission loss curve of the resonance cavity muffler 300 under different refrigerant ratio schemes is shown. Figure 3 By further analyzing the muffler transmission loss curve, a relationship table of the maximum muffler volume and the optimal muffler frequency of the resonant cavity muffler 300 under different mixing ratios of the refrigerant R1234y and the refrigerant R1234ze can be obtained, as shown below:

[0057] R1234yf R1234ze Maximum noise reduction dB Optimal noise reduction frequency Hz 100％ 0％ 51.8 281 90％ 10％ 59.9 284 70％ 30％ 73.9 290 50％ 50％ 60.2 296 30％ 70％ 53.6 302 10％ 90％ 53.7 308 0％ 100％ 57.2 311

[0058] It can be seen that under different refrigerant ratio schemes, the optimal silencer frequency when the resonance cavity silencer 300 reaches the maximum silencer amount is different. Therefore, in the manufacturing process of the air conditioner 10, by measuring in advance the peak noise frequency in the outdoor unit 120 when the compressor 210 is working, and selecting the refrigerant ratio scheme accordingly based on the peak noise frequency, the silencer effect of the resonance cavity silencer 300 can be fully exerted, and the operating noise of the outdoor unit 120 can be minimized.

[0059] In an optional embodiment, the compression refrigeration cycle system 200 is configured so that when the peak noise frequency is in a first frequency range, the proportion of refrigerant R1234yf in the refrigerant filled in the compression refrigeration cycle system 200 is greater than or equal to the proportion of refrigerant R1234ze. When the peak noise frequency is in a second frequency range, the proportion of refrigerant R1234yf in the refrigerant filled in the compression refrigeration cycle system 200 is less than the proportion of refrigerant R1234ze, wherein the frequency value in the first frequency range is less than the frequency value in the second frequency range. By dividing the frequency ranges and rationally controlling the proportions of refrigerant R1234yf and refrigerant R1234ze, the operating noise in the outdoor unit 120 when the compressor 210 is working can be significantly reduced, thereby improving the user's home environment and enhancing the user's comfort experience.

[0060] In this embodiment, the first frequency interval may be (0 Hz, 298 Hz], and the second frequency interval may be (298 Hz, 500 Hz].

[0061] In another optional embodiment, the compression refrigeration cycle system 200 can be further configured so that the peak noise frequency is in the range of (0 Hz, 282 Hz], and the refrigerant filled in the compression refrigeration cycle system 200 is 100% refrigerant R1234yf, or the peak noise frequency is in the range of (282 Hz, 286 Hz], and the refrigerant filled in the compression refrigeration cycle system 200 is 90% refrigerant R1234yf and 10% refrigerant R1234yf. The mixed refrigerant is composed of 70% refrigerant R1234yf and 30% refrigerant R1234ze, or the peak noise frequency is in the range of (286Hz, 294Hz], and the refrigerant filled in the compression refrigeration cycle system 200 is a mixed refrigerant composed of 70% refrigerant R1234yf and 30% refrigerant R1234ze, or the peak noise frequency is in the range of (294Hz, 298Hz], and the refrigerant filled in the compression refrigeration cycle system 200 is 50% refrigerant R1234yf and 50% refrigerant R1234 ze, or the peak noise frequency is in the range of [298 Hz, 306 Hz], and the refrigerant filled in the compression refrigeration cycle 200 is a mixed refrigerant composed of 30% refrigerant R1234yf and 70% refrigerant R1234ze; or the peak noise frequency is in the range of [306 Hz, 310 Hz], and the refrigerant filled in the compression refrigeration cycle 200 is a mixed refrigerant composed of 10% refrigerant R1234yf and 90% refrigerant R1234ze; or the peak noise frequency is in the range of [310 Hz, 500 Hz], and the refrigerant filled in the compression refrigeration cycle 200 is 100% refrigerant R1234ze. By further dividing the frequency range and selecting the refrigerant ratio scheme accordingly according to the frequency range where the peak noise of the outdoor unit 120 is located, the peak noise of the outdoor unit 120 can be reduced more specifically, and the noise reduction effect of the outdoor unit 120 can be better.

[0062] The present invention further provides a manufacturing method for the air conditioner 10. It should be noted that the air conditioner 10 of the above embodiment can be manufactured by, but is not limited to, this manufacturing method. Figure 4 is a flow chart of a method for manufacturing an air conditioner 10 according to an embodiment of the present invention, referring to Figure 4 The manufacturing method at least includes the following steps S102 to S108.

[0063] S102 Silencer installation step: Install the silencer into the fluid path of the compression refrigeration cycle system 200 in the outdoor unit 120 .

[0064] S104 Peak noise detection step: Detect the peak noise frequency corresponding to the peak noise generated in the outdoor unit 120 when the compressor 210 in the compression refrigeration cycle system 200 is working. The peak noise is defined as: for the working noise generated by the compressor 210 during operation in the range of (0 Hz, 500 Hz), if its maximum peak intensity is at least 20% greater than its average intensity, then the working noise corresponding to the maximum peak intensity is the peak noise.

[0065] S106: Refrigerant ratio determination step: determining the ratio of the refrigerant to be charged into the compression refrigeration cycle system 200 according to the peak noise frequency.

[0066] S108 refrigerant filling step: filling the refrigerant with the determined ratio into the compression refrigeration cycle system 200.

[0067] The manufacturing method for an air conditioner 10 of the present invention first installs a silencer into the fluid path of the compression refrigeration cycle system 200 within the outdoor unit 120. The method then detects the peak noise frequency within the outdoor unit 120 when the compressor 210 is operating. Based on the peak noise frequency, the refrigerant ratio to be charged into the compression refrigeration cycle 200 is determined. Finally, the refrigerant with the determined ratio is charged into the compression refrigeration cycle 200. This innovative method of specifically determining the refrigerant ratio based on the peak noise frequency and charging the compression refrigeration cycle 200 with a mixed refrigerant according to the ratio significantly reduces the decibel level of narrowband frequency noise within 500 Hz during the operation of the compressor 210, thereby improving the user experience.

[0068] In the refrigerant ratio determination step, the refrigerant to be charged into compression refrigeration cycle system 200 is selected to consist of one or both of refrigerant R1234yf and refrigerant R1234ze. In the determined refrigerant ratio, as the peak noise frequency increases, the proportion of refrigerant R1234yf decreases from 100% to 0%, while the proportion of refrigerant R1234ze increases from 0% to 100%.

[0069] In the refrigerant ratio determination step, the ratio of the refrigerant to be charged can be determined according to the following rules: if the peak noise frequency is in the range of (0 Hz, 282 Hz], the ratio of the refrigerant to be charged is 100% R1234yf; if the peak noise frequency is in the range of (282 Hz, 286 Hz], the ratio of the refrigerant to be charged is 90% R1234yf and 10% R1234ze to form a mixed refrigerant; if the peak noise frequency is in the range of (286 Hz, 294 Hz], the ratio of the refrigerant to be charged is 70% R1234yf and 30% R1234ze to form a mixed refrigerant; if the peak noise frequency is in the range of (294 Hz, 298 Hz] range, the ratio of the refrigerant to be charged is 50% R1234yf and 50% R1234ze to form a mixed refrigerant; if the peak noise frequency is in the (298Hz, 306Hz] range, the ratio of the refrigerant to be charged is 30% R1234yf and 70% R1234ze to form a mixed refrigerant; if the peak noise frequency is in the (306Hz, 310Hz] range, the ratio of the refrigerant to be charged is 10% R1234yf and 90% R1234ze to form a mixed refrigerant; if the peak noise frequency is in the (310Hz, 500Hz] range, the ratio of the refrigerant to be charged is a refrigerant composed of 100% R1234ze.

[0070] In an optional embodiment, the manufacturing method may further include a step of setting the operating program of the compressor 210 at S110, i.e., setting the operating program of the compressor 210 so that the exhaust temperature of the compressor 210 is set to 60°C to 70°C and the exhaust pressure is set to 2.8 MPa to 3.2 MPa. Since this step is an electronically controlled step, it can be executed at any stage without affecting the execution of steps S102 to S108.

[0071] In the refrigerant charging step S108 , the charging amount and charging pressure of the refrigerant may be controlled so that the normal pipeline pressure of the compression refrigeration cycle system 200 in the non-operating state is ≤4.5 MPa.

[0072] It should be noted that the structural dimensions of the resonant cavity muffler 300 determine its natural frequency. When its natural frequency matches the peak noise frequency within the outdoor unit 120, the resonant cavity muffler 300 reaches its maximum amplitude. At this point, the reciprocating speed of the sound waves within the resonant cavity muffler 300 reaches its maximum, and frictional resistance is maximized, resulting in maximum sound attenuation. However, the resonant cavity muffler 300 is highly selective with respect to peak noise frequencies, resulting in a narrow noise attenuation band. When the peak noise frequency differs significantly from its natural frequency, the maximum sound attenuation drops sharply.

[0073] In this embodiment, the volume of the resonant cavity can be 600mm 3~1000mm 3 The diameter of the expansion cavity can be 12mm to 18mm and the length can be 80mm to 120mm. The cross-sectional area of ​​the connecting tube 330 can be 12mm 2 ~20mm 2 The length can be 1mm to 3mm. The diameter of the connecting tube 311 can be 6mm to 10mm. In a typical configuration, the volume of the resonant cavity is 800mm 3 The diameter of the expansion cavity is 16 mm, the length is 100 mm, and the cross-sectional area of ​​the connecting tube 330 is 16 mm. 2 , a length of 2 mm, and a diameter of the connecting tube 311 of 8 mm, so that the natural frequency of the resonant cavity muffler 300 is maintained at approximately 300 Hz. The relationship table showing the maximum sound attenuation and the optimal sound attenuation frequency of the resonant cavity muffler 300 at different refrigerant R1234y and R1234ze mixing ratios shows that the optimal sound attenuation frequency varies little under different refrigerant ratios. By maintaining the natural frequency of the resonant cavity muffler 300 at approximately 300 Hz within a 30 Hz range, it is possible to ensure that the resonant cavity muffler 300 achieves a good sound attenuation effect under different refrigerant ratios.

[0074] Figure 5 is a flow chart of peak noise detection according to one embodiment of the present invention, referring to Figure 5 , S104 peak noise frequency detection step may include:

[0075] S1041, obtaining noise data in the outdoor unit 120 when the compressor 210 is operating.

[0076] In this step, noise data can be measured by an acoustic microphone.

[0077] S1042: Analyze the noise data to obtain frequency spectrum data of the noise data.

[0078] In this step, spectrum data may be generated by a spectrum analyzer.

[0079] S1043: Determine whether peak noise exists based on the frequency spectrum data of the noise data.

[0080] S1044: If it exists, further determine its corresponding peak noise frequency.

[0081] By analyzing the above data, in order to solve the problem of narrow-band noise within 500Hz (bandwidth less than 30Hz) generated by the air conditioner 10, the resonance cavity silencer combined with the mixed refrigerant noise reduction technology can be used to minimize the narrow-band noise within 500Hz generated by the air conditioner 10.

[0082] At this point, those skilled in the art will recognize that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications consistent with the principles of the present invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

1. A method for manufacturing an air conditioner, the air conditioner including a compression refrigeration cycle system partially located within an outdoor unit of the air conditioner, the method comprising: The silencer installation step includes installing the silencer into a fluid path of the compression refrigeration cycle system in the outdoor unit; A peak noise detection step: detecting a peak noise frequency corresponding to peak noise occurring in the outdoor unit when the compressor in the compression refrigeration cycle system is operating, wherein the peak noise is defined as follows: for the operating noise generated by the compressor in the range of (0 Hz, 500 Hz) during operation, if the maximum peak intensity is at least 20% greater than the average intensity, then the operating noise corresponding to the maximum peak intensity is the peak noise; Refrigerant ratio determination step: determining a ratio scheme of the refrigerant to be charged into the compression refrigeration cycle system according to the peak noise frequency; Refrigerant filling step: filling the refrigerant with a determined ratio into the compression refrigeration cycle system; Wherein, in the refrigerant ratio determination step, the refrigerant to be filled in the compression refrigeration cycle system is selected to be composed of one or both of refrigerant R1234yf and refrigerant R1234ze; In the determined ratio scheme of the refrigerant to be charged, the higher the peak noise frequency is, the lower the proportion of the refrigerant R1234yf is from 100% to 0%, and the corresponding increase in the proportion of the refrigerant R1234ze is from 0% to 100%.

2. The manufacturing method according to claim 1, wherein In the refrigerant ratio determination step, the ratio of the refrigerant to be charged is determined according to the following rules: If the peak noise frequency is in the range of (0 Hz, 282 Hz], the refrigerant to be charged is a refrigerant of 100% R1234yf; If the peak noise frequency is in the range of (282 Hz, 286 Hz], the refrigerant to be charged is a mixed refrigerant consisting of 90% R1234yf and 10% R1234ze; If the peak noise frequency is in the range of (286 Hz, 294 Hz], the refrigerant to be charged is a mixed refrigerant consisting of 70% R1234yf and 30% R1234ze; If the peak noise frequency is in the range of (294 Hz, 298 Hz], the refrigerant to be charged is a mixed refrigerant consisting of 50% R1234yf and 50% R1234ze; If the peak noise frequency is in the range of (298 Hz, 306 Hz], the refrigerant to be charged is a mixed refrigerant consisting of 30% R1234yf and 70% R1234ze; If the peak noise frequency is in the range of (306 Hz, 310 Hz], the refrigerant to be charged is a mixed refrigerant consisting of 10% R1234yf and 90% R1234ze; If the peak noise frequency is in the range of (310 Hz, 500 Hz), the refrigerant to be charged is a refrigerant composed of 100% R1234ze.

3. The manufacturing method according to claim 1 further includes a compressor working program setting step: setting the working program of the compressor so that the exhaust temperature of the compressor is set to 60°C to 70°C and the exhaust pressure is set to 2.8Mpa to 3.2Mpa.

4. The manufacturing method according to claim 1, wherein In the muffler installation step, the muffler is selected as a resonance chamber muffler, which is connected between the exhaust end of the compressor and any heat exchanger of the compression refrigeration cycle system.

5. The manufacturing method according to claim 4, wherein: The resonant cavity muffler comprises: an expansion tube defining an expansion cavity therein; a resonance box, disposed above the expansion tube and defining a resonance cavity therein; and A connecting pipe is provided between the resonance box and the expansion pipe, and is used for connecting the resonance cavity and the expansion cavity.

6. An air conditioner manufactured by the manufacturing method according to any one of claims 1 to 5.

7. An air conditioner comprising: a compression refrigeration cycle system partially located within an outdoor unit of the air conditioner, the compression refrigeration cycle system being filled with a refrigerant consisting of one or both of refrigerant R1234yf and refrigerant R1234ze, wherein a peak noise generated within the outdoor unit when a compressor in the compression refrigeration cycle system is operating has a peak noise frequency; as well as a resonance cavity muffler connected between the exhaust end of the compressor and any heat exchanger of the compression refrigeration cycle system; Wherein, the compression refrigeration cycle system is configured such that: The peak noise frequency is within a first frequency range, and in the refrigerant charged in the compression refrigeration cycle system, the proportion of refrigerant R1234yf is greater than or equal to the proportion of refrigerant R1234ze; or The peak noise frequency is in the second frequency range, and in the refrigerant filled in the compression refrigeration cycle system, the proportion of refrigerant R1234yf is less than the proportion of refrigerant R1234ze; and The frequency value in the first frequency interval is smaller than the frequency value in the second frequency interval.

8. The air conditioner according to claim 7, wherein: The first frequency interval is (0 Hz, 298 Hz]; and The second frequency interval is (298 Hz, 500 Hz].

9. The air conditioner according to claim 7, wherein: The compression refrigeration cycle system is further configured such that: The peak noise frequency is in the range of (0 Hz, 282 Hz], and the refrigerant filled in the compression refrigeration cycle system is 100% refrigerant R1234yf; or The peak noise frequency is in the range of (282 Hz, 286 Hz), and the refrigerant filled in the compression refrigeration cycle system is a mixed refrigerant consisting of 90% refrigerant R1234yf and 10% refrigerant R1234ze; or The peak noise frequency is in the range of (286 Hz, 294 Hz), and the refrigerant filled in the compression refrigeration cycle system is a mixed refrigerant consisting of 70% refrigerant R1234yf and 30% refrigerant R1234ze; or The peak noise frequency is in the range of (294 Hz, 298 Hz), and the refrigerant filled in the compression refrigeration cycle system is a mixed refrigerant consisting of 50% refrigerant R1234yf and 50% refrigerant R1234ze; or The peak noise frequency is in the range of (298 Hz, 306 Hz), and the refrigerant filled in the compression refrigeration cycle system is a mixed refrigerant consisting of 30% refrigerant R1234yf and 70% refrigerant R1234ze; or The peak noise frequency is in the range of (306 Hz, 310 Hz), and the refrigerant filled in the compression refrigeration cycle system is a mixed refrigerant consisting of 10% refrigerant R1234yf and 90% refrigerant R1234ze; or The peak noise frequency is in the range of (310 Hz, 500 Hz), and the refrigerant filled in the compression refrigeration cycle system is 100% refrigerant R1234ze.

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