Air-cooled cold water heat pump unit, beat vibration abnormal sound suppression method thereof, controller and medium

Abstract

The embodiment of the invention provides an air-cooled cold water heat pump unit and a beat vibration abnormal sound suppression method thereof, a controller and a medium, the air-cooled cold water heat pump unit comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger and an outdoor fan, and the indoor heat exchanger is provided with a water cooling pipeline; the beat vibration abnormal sound suppression method comprises the steps that at least one set of preset beat vibration parameters of the air-cooled cold water heat pump unit in the beat vibration abnormal sound generation period are obtained, and each set of preset beat vibration parameters comprise the preset beat vibration frequency of a compressor and / or the preset beat vibration rotating speed of a fan; when the real-time parameters of the air-cooled cold water heat pump unit run to the preset beat vibration parameters, the real-time water outlet temperature of the water cooling pipeline is collected; and a water outlet temperature difference value between the preset target water outlet temperature and the real-time water outlet temperature is determined, and the operation frequency of the compressor is adjusted according to the water outlet temperature difference value. According to the embodiment of the invention, the beat frequency abnormal sound can be effectively inhibited, the unit comfort and noise are not sacrificed, and the operation reliability is improved.

Description

Technical Field

[0001] The present application relates to the technical field of heat pump units, and in particular to an air-cooled chilled water heat pump unit and a method, controller and medium for suppressing beat and abnormal noise thereof. Background Art

[0002] In the related art, there are currently two control schemes for preventing the unit from flapping and making abnormal noises in air-cooled chilled water heat pump units: the first is to suppress the flapping and making abnormal noises by shielding the flapping compressor operating frequency. However, the shielded compressor operating frequency is generally 5HZ. When the unit's frequency is too high due to avoiding the interval, the unit's output capacity is much higher than the terminal demand, which will cause frequent temperature shutdowns. The second is to calculate the fan speed interval corresponding to the excitation of flapping and making abnormal noises based on the relationship between the fan speed and the compressor speed and taking the compressor frequency as a determined quantity. The fan speed is adjusted to avoid the fan speed interval corresponding to the excitation of flapping and making abnormal noises, thereby effectively suppressing flapping and making abnormal noises. However, increasing the wind speed to avoid flapping and making abnormal noises will increase the noise. Reducing the wind speed during heating will cause the frost on the fin heat exchanger to increase. Frequent defrosting will cause changes in the indoor ambient temperature. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes an air-cooled chilled water heat pump unit and a method for suppressing beat frequency abnormal noise, aiming to effectively suppress beat frequency abnormal noise without sacrificing the comfort and noise of the unit and improving the operation reliability.

[0004] In a first aspect, an embodiment of the present application provides a method for suppressing beat noise of an air-cooled chilled water heat pump unit, wherein the air-cooled chilled water heat pump unit comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger and an outdoor fan, wherein a refrigerant circulation loop is formed between the compressor, the indoor heat exchanger and the outdoor heat exchanger, the outdoor fan is arranged on one side of the outdoor heat exchanger, and the indoor heat exchanger is provided with a water cooling pipeline; the method comprises:

[0005] Acquire at least one set of preset beat vibration parameters of the air-cooled chiller heat pump unit during the period when the beat vibration abnormal sound is generated, wherein each set of the preset beat vibration parameters includes a preset beat vibration frequency of the compressor and / or a preset beat vibration speed of the fan;

[0006] When the real-time parameter of the air-cooled chilled water heat pump unit reaches the preset beat parameter, the real-time outlet water temperature of the water cooling pipeline is collected;

[0007] Determine the outlet water temperature difference between the preset target outlet water temperature and the real-time outlet water temperature, and adjust the operating frequency of the compressor according to the outlet water temperature difference.

[0008] According to some embodiments of the present application, adjusting the operating frequency of the compressor according to the outlet water temperature difference includes:

[0009] When the outlet water temperature difference is greater than a first preset difference, the operating frequency of the compressor is adjusted so that the operating frequency of the compressor is outside the beat frequency interval, wherein the beat frequency interval is determined by the preset beat frequency, the preset beat frequency is within the beat frequency interval, and one beat frequency interval corresponds to one preset beat frequency.

[0010] According to some embodiments of the present application, adjusting the operating frequency of the compressor according to the outlet water temperature difference includes:

[0011] When the outlet water temperature difference is less than or equal to a first preset difference, determining a target frequency amplitude and a target frequency adjustment speed corresponding to the preset beat vibration parameter, wherein one preset beat vibration parameter corresponds to one frequency amplitude and one frequency adjustment speed;

[0012] The operating frequency of the compressor is adjusted according to the target frequency amplitude and the target frequency adjustment speed.

[0013] According to some embodiments of the present application, the method further includes:

[0014] In the process of adjusting the operating frequency of the compressor according to the target frequency amplitude and the target frequency adjustment speed, obtaining the start / stop state of the air-cooled chilled water heat pump unit;

[0015] The operating frequency of the compressor is adjusted according to the outlet water temperature difference and the start / stop state of the unit.

[0016] According to some embodiments of the present application, adjusting the operating frequency of the compressor according to the outlet water temperature difference and the start / stop state of the unit includes:

[0017] When the outlet water temperature difference is maintained between the first preset difference and the second preset difference for a preset period of time and the air-cooled chiller heat pump unit does not shut down due to reaching the temperature, the operating frequency of the compressor is increased, wherein the second preset difference is smaller than the first preset difference.

[0018] According to some embodiments of the present application, adjusting the operating frequency of the compressor according to the outlet water temperature difference and the start / stop state of the unit includes:

[0019] When the outlet water temperature difference is less than or equal to the second preset difference and the air-cooled chiller heat pump unit does not shut down due to reaching the temperature, the operating frequency of the compressor is maintained adjusted according to the target frequency amplitude and the target frequency adjustment speed.

[0020] According to some embodiments of the present application, adjusting the operating frequency of the compressor according to the outlet water temperature difference and the start / stop state of the unit includes:

[0021] When the air-cooled chiller heat pump unit reaches a certain temperature and shuts down, the operating frequency of the compressor is reduced.

[0022] According to some embodiments of the present application, the determining the outlet water temperature difference between the preset target outlet water temperature and the real-time outlet water temperature includes:

[0023] When the air-cooled chiller heat pump unit executes a heating mode, the difference between the target outlet water temperature and the real-time outlet water temperature is used as the outlet water temperature difference;

[0024] When the air-cooled chilled water heat pump unit executes the cooling mode, the difference between the real-time outlet water temperature and the target outlet water temperature is used as the outlet water temperature difference.

[0025] In a second aspect, an embodiment of the present application provides a controller comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the method for suppressing beat noise of an air-cooled chilled water heat pump unit according to the first aspect when running the computer program.

[0026] In a third aspect, an embodiment of the present application provides an air-cooled chilled water heat pump unit, comprising the controller of the second aspect described above.

[0027] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the method for suppressing beat noise of an air-cooled chilled water heat pump unit as described in the first aspect above.

[0028] In the fifth aspect, an embodiment of the present application provides a computer program product, including a computer program or a computer instruction, characterized in that the computer program or the computer instruction is stored in a computer-readable storage medium, a processor of a computer device reads the computer program or the computer instruction from the computer-readable storage medium, and the processor executes the computer program or the computer instruction, so that the computer device executes the method for suppressing beat noise of an air-cooled chilled water heat pump unit as described in the first aspect above.

[0029] According to the technical solution of the embodiment of the present application, at least the following beneficial effects are achieved: the embodiment of the present application can collect the real-time outlet water temperature of the water cooling pipeline when the unit runs to the preset beat point, and adjust the operating frequency of the compressor according to the outlet water temperature difference between the preset target outlet water temperature and the real-time outlet water temperature. The embodiment of the present application can change the compressor operating vibration waveform to make it unstable in the interval where the compressor frequency and the fan speed have beat frequencies, thereby avoiding the formation of resonance points, effectively suppressing beat frequency abnormal sounds, and at the same time not sacrificing the comfort and noise of the unit; in addition, the small fluctuations of the compressor frequency suppress the beat frequency abnormal sounds, effectively reducing the large fluctuations of the system caused by suppressing the beat frequency abnormal sounds, which is conducive to the stable operation of the unit and improves the operational reliability.

[0030] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are used to provide further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0032] Figure 1 It is a structural schematic diagram of an air-cooled chilled water heat pump unit provided by an embodiment of the present application;

[0033] Figure 2 This is a flow chart of a method for suppressing the beat noise of an air-cooled chilled water heat pump unit provided by an embodiment of the present application;

[0034] Figure 3 is a flow chart of a method for suppressing beat noise of an air-cooled chiller heat pump unit provided by another embodiment of the present application;

[0035] Figure 4 is a flow chart of a method for suppressing beat noise of an air-cooled chiller heat pump unit provided by another embodiment of the present application;

[0036] Figure 5 is a flow chart of a method for suppressing beat noise of an air-cooled chiller heat pump unit provided by another embodiment of the present application;

[0037] Figure 6 It is a schematic diagram of a controller for executing a method for suppressing beat noise of an air-cooled chiller heat pump unit provided by an embodiment of the present application. DETAILED DESCRIPTION

[0038] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0039] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0040] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0041] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0042] In some cases, there are currently two control schemes for preventing the beat noise of air-cooled chilled water heat pump units: the first is to suppress the beat noise by shielding the operating frequency of the compressor. However, the shielded compressor operating frequency is generally 5HZ. When the unit's frequency is too high due to avoiding the interval, the unit's output capacity is much higher than the terminal demand, which will cause frequent temperature shutdowns; the second is to calculate the fan speed interval corresponding to the excitation of beat noise based on the relationship between the fan speed and the compressor speed and take the compressor frequency as the determined quantity. The fan speed is adjusted to avoid the fan speed interval corresponding to the excitation of beat noise, thereby effectively suppressing the beat noise. However, increasing the wind speed to avoid beat noise will cause increased noise, while reducing the wind speed during heating will cause the frost on the fin heat exchanger to increase. Frequent defrosting will cause changes in the indoor ambient temperature.

[0043] Based on the above situation, the embodiment of the present application proposes an air-cooled chilled water heat pump unit and a method for suppressing beat frequency noise, aiming to effectively suppress beat frequency noise without sacrificing the comfort and noise of the unit and improving operational reliability.

[0044] The various embodiments of the air-cooled chilled water heat pump unit of the present application are further described below in conjunction with the accompanying drawings.

[0045] like Figure 1 As shown, Figure 1 It is a structural schematic diagram of an air-cooled chilled water heat pump unit provided in one embodiment of the present application.

[0046] In one embodiment, the air-cooled chilled water heat pump unit of the embodiment of the present application includes but is not limited to a compressor 100, an indoor heat exchanger 200, an outdoor heat exchanger 300 and an outdoor fan 400. A refrigerant circulation loop is formed between the compressor 100, the indoor heat exchanger 200 and the outdoor heat exchanger 300. The outdoor fan 400 is arranged on one side of the outdoor heat exchanger 300, and the indoor heat exchanger 200 is provided with a water cooling pipeline 210.

[0047] In one embodiment, the air-cooled chilled water heat pump unit also includes but is not limited to a four-way valve 510 and a gas-liquid separator 520. The four-way valve 510 is respectively connected to the exhaust port of the compressor 100, the indoor heat exchanger 200, the outdoor heat exchanger 300 and the return air port of the compressor 100, and the gas-liquid separator 520 is arranged between the four-way valve 510 and the return air port of the compressor 100.

[0048] In one embodiment, the air-cooled chilled water heat pump unit further includes but is not limited to a filter 610 and an electronic expansion valve 620 , and the filter 610 and the electronic expansion valve 620 are disposed between the indoor heat exchanger 200 and the outdoor heat exchanger 300 .

[0049] In one embodiment, the air-cooled chilled water heat pump unit further includes but is not limited to a high-pressure tank 630 , and the high-pressure tank 630 is disposed between the indoor heat exchanger 200 and the filter 610 .

[0050] In one embodiment, the air-cooled chilled water heat pump unit also includes but is not limited to an economizer 640, the input end of the main flow path of the economizer 640 is connected to the indoor heat exchanger 200, the output end of the main flow path is connected to the outdoor heat exchanger 300, the input end of the secondary flow path of the economizer 640 is connected to the output end of the main flow path, and the output end of the secondary flow path is connected to the compressor 100.

[0051] In one embodiment, the air-cooled chilled water heat pump unit further includes but is not limited to a water pump 211 and a water flow switch 212 , and the water pump 211 and the water flow switch 212 are arranged at the inlet or outlet of the water cooling pipeline 210 .

[0052] Based on the hardware structure of the air-cooled chilled water heat pump unit in each of the above-mentioned embodiments, various embodiments of the method for suppressing beat noise of the air-cooled chilled water heat pump unit of the present application are respectively proposed below.

[0053] like Figure 2 As shown, Figure 2It is a flow chart of a method for suppressing the beat and abnormal noise of an air-cooled chilled water heat pump unit provided by an embodiment of the present application; the method for suppressing the beat and abnormal noise of an air-cooled chilled water heat pump unit may include but is not limited to step S210, step S220 and step S230.

[0054] Step S210, obtaining at least one set of preset beat vibration parameters of the air-cooled chilled water heat pump unit during the period when the beat vibration abnormal sound is generated, wherein each set of preset beat vibration parameters includes a preset beat vibration frequency of the compressor and / or a preset beat vibration speed of the fan;

[0055] Step S220: When the real-time parameters of the air-cooled chilled water heat pump unit reach the preset beat vibration parameters, the real-time outlet water temperature of the water cooling pipeline is collected;

[0056] Step S230: determine the outlet water temperature difference between the preset target outlet water temperature and the real-time outlet water temperature, and adjust the operating frequency of the compressor according to the outlet water temperature difference.

[0057] In one embodiment, first, the beat point of the air-cooled water-cooled heat pump unit can be determined in advance through testing, that is, one or more sets of preset beat parameters corresponding to the beat sound generated by the air-cooled water-cooled heat pump unit are recorded, specifically, the preset beat frequency of the compressor or the preset beat speed of the fan corresponding to the beat sound generated by the air-cooled water-cooled heat pump unit; then, in the actual operation process, if the air-cooled water-cooled heat pump unit runs to the preset beat point, that is, the real-time parameters of the air-cooled water-cooled heat pump unit run to the preset beat parameters, the air-cooled water-cooled heat pump unit will collect the real-time outlet water temperature of the water cooling pipeline, and calculate the outlet water temperature difference between the target outlet water temperature and the real-time outlet water temperature to adjust the operating frequency of the compressor.

[0058] It should be noted that the preset beat vibration parameters may also include but are not limited to the beat vibration period, that is, the beat vibration period when the air-cooled chiller heat pump unit produces beat vibration abnormal sound.

[0059] In one embodiment, a preset beat point corresponds to a set of preset beat parameters. For example, a preset beat point corresponds to a preset beat frequency, a preset beat rotation speed and a preset beat period.

[0060] It can be understood that the above-mentioned target water outlet temperature can be pre-set, and the embodiment of the present application does not specifically limit the numerical value of the target water outlet temperature.

[0061] In addition, it should be noted that the outlet water temperature difference between the above-mentioned target outlet water temperature and the real-time outlet water temperature is specifically divided into the following two situations: First, when the air-cooled water chiller heat pump unit executes the heating mode, the difference between the target outlet water temperature and the real-time outlet water temperature is used as the outlet water temperature difference; Second, when the air-cooled water chiller heat pump unit executes the cooling mode, the difference between the real-time outlet water temperature and the target outlet water temperature is used as the outlet water temperature difference.

[0062] In addition, it should be noted that the embodiment of the present application can adjust the operating frequency of the compressor according to the outlet water temperature difference between the preset target outlet water temperature and the real-time outlet water temperature. If the outlet water temperature difference is large, it indicates that the real-time outlet water temperature is far from reaching the target outlet water temperature. At this time, even if the operating frequency of the compressor is adjusted quickly or significantly, the real-time outlet water temperature will not immediately reach the target outlet water temperature; if the outlet water temperature difference is small, it indicates that the real-time outlet water temperature is close to reaching the target outlet water temperature. At this time, it is necessary to periodically or slightly adjust the operating frequency of the compressor to prevent the real-time outlet water temperature from reaching the target outlet water temperature.

[0063] It is worth noting that the embodiment of the present application can change the compressor operating vibration waveform to make it unstable and avoid forming a resonance point by controlling the compressor frequency to fluctuate slightly in the range where there is a beat frequency between the compressor frequency and the fan speed, thereby effectively suppressing the beat frequency noise without sacrificing the comfort and noise of the unit. In addition, the small fluctuations of the compressor frequency suppress the beat frequency noise, effectively reducing the large fluctuations of the system caused by suppressing the beat frequency noise, which is beneficial to the stable operation of the unit and improves the operational reliability.

[0064] It should be noted that the above step S230 of adjusting the operating frequency of the compressor according to the outlet water temperature difference may include but is not limited to: Figure 3 or Figure 4 The two implementations shown are as follows:

[0065] like Figure 3 As shown, Figure 3 It is a flow chart of a method for suppressing beat noise of an air-cooled chilled water heat pump unit provided by another embodiment of the present application; regarding the above-mentioned step S230 in which the operating frequency of the compressor is adjusted according to the outlet water temperature difference, it may include but is not limited to step S310 and step S320.

[0066] Step S310: when the outlet water temperature difference is greater than the first preset difference;

[0067] Step S320: adjust the operating frequency of the compressor so that the operating frequency of the compressor is outside the beat frequency interval, wherein the beat frequency interval is determined by a preset beat frequency, the preset beat frequency is within the beat frequency interval, and one beat frequency interval corresponds to one preset beat frequency.

[0068] In one embodiment, for each preset beat frequency, a beat frequency interval can be correspondingly expanded; if during actual operation, the compressor frequency and the fan speed of the unit run to the corresponding beat frequency point, and the outlet water temperature difference is greater than the first preset difference, it indicates that the real-time outlet water temperature is far from the target outlet water temperature. At this time, the compressor frequency can be controlled to quickly skip the corresponding beat frequency interval, thereby avoiding the occurrence of abnormal beat frequency sound.

[0069] It can be understood that the above-mentioned first preset difference can be pre-set, and the embodiment of the present application does not specifically limit the value of the first preset difference.

[0070] like Figure 4 As shown, Figure 4 It is a flow chart of a method for suppressing beat noise of an air-cooled chilled water heat pump unit provided by another embodiment of the present application; regarding the above-mentioned step S230 in which the operating frequency of the compressor is adjusted according to the outlet water temperature difference, it may include but is not limited to step S410 and step S420.

[0071] Step S410: when the outlet water temperature difference is less than or equal to the first preset difference, determining a target frequency amplitude and a target frequency adjustment speed corresponding to a preset beat vibration parameter, wherein one preset beat vibration parameter corresponds to one frequency amplitude and one frequency adjustment speed;

[0072] Step S420: adjusting the operating frequency of the compressor according to the target frequency amplitude and the target frequency adjustment speed.

[0073] In one embodiment, if during actual operation, the compressor frequency and fan speed of the unit run to the corresponding beat frequency point, and the outlet water temperature difference is less than or equal to the first preset difference, since the real-time outlet water temperature is close to the target outlet water temperature at this time, then it is necessary to periodically adjust the operating frequency of the compressor. Specifically, the operating frequency of the compressor can be adjusted based on the target frequency amplitude and the target frequency adjustment speed to avoid beat frequency abnormal noise.

[0074] It should be noted that, for each preset beat frequency, the sum of the preset beat frequency and the target frequency amplitude cannot include other adjacent preset beat frequencies, that is, adjacent beat points need to be avoided. Specifically, for each preset beat frequency, the target frequency amplitude can be determined according to the difference between the preset beat frequency and the adjacent beat frequency.

[0075] In addition, when the frequency is low, the adjustment speed can be appropriately increased; when the frequency is high, the adjustment speed can be appropriately slowed down.

[0076] In addition, if Figure 5 As shown, Figure 5This is a flow chart of a method for suppressing the beat and abnormal noise of an air-cooled chilled water heat pump unit provided in another embodiment of the present application; the method for suppressing the beat and abnormal noise may also include but is not limited to step S510 and step S520.

[0077] Step S510, in the process of adjusting the operating frequency of the compressor according to the target frequency amplitude and the target frequency adjustment speed, obtaining the start / stop state of the air-cooled chilled water heat pump unit;

[0078] Step S520: adjusting the operating frequency of the compressor according to the outlet water temperature difference and the start / stop status of the unit.

[0079] In one embodiment, in the process of adjusting the operating frequency of the compressor according to the target frequency amplitude and the target frequency adjustment speed, the embodiment of the present application can also adjust the operating frequency of the compressor according to the outlet water temperature difference and the start-stop state of the unit, as follows:

[0080] The first implementation: when the outlet water temperature difference is maintained between the first preset difference and the second preset difference for a preset time, and the air-cooled chiller heat pump unit does not shut down due to reaching the temperature, the operating frequency of the compressor is increased, wherein the second preset difference is less than the first preset difference. If the real-time outlet water temperature and the target outlet water temperature are not too close, and the unit has not shut down due to reaching the temperature during the process of adjusting the operating frequency of the compressor, it means that the frequency of the compressor can still have a certain room for increase, and the target operating frequency of the compressor can be appropriately increased.

[0081] The second implementation: when the outlet water temperature difference is less than or equal to the second preset difference, and the air-cooled chiller heat pump unit has not stopped due to reaching the temperature, the operating frequency of the compressor is adjusted according to the target frequency amplitude and the target frequency adjustment speed. If the real-time outlet water temperature is very close to the target outlet water temperature, but the unit has not stopped due to reaching the temperature during the process of adjusting the operating frequency of the compressor, it means that the frequency of the compressor is close to the upper limit, and the operating frequency of the compressor can be adjusted according to the target frequency amplitude and the target frequency adjustment speed.

[0082] The third implementation situation: when the air-cooled chiller heat pump unit stops due to overheating, reduce the operating frequency of the compressor. If the unit stops due to overheating during the process of adjusting the operating frequency of the compressor, it means that the frequency of the compressor is too high. At this time, the target operating frequency of the compressor can be appropriately reduced.

[0083] Based on the above-mentioned methods for suppressing the beat and abnormal noise of an air-cooled chilled water heat pump unit in each of the above-mentioned embodiments, overall embodiments of the method for suppressing the beat and abnormal noise of an air-cooled chilled water heat pump unit of the present application are respectively proposed below.

[0084] In one embodiment, the specific steps of the method for suppressing abnormal vibration noise in the embodiment of the present application are as follows:

[0085] 1. The corresponding relationship between the fan speed and compressor frequency caused by the abnormal vibration noise of the air-cooled chiller (heat pump) unit is determined through testing, as shown in Table 1 below:

[0086] Beat point The preset beat frequency Fr of the compressor Preset beat speed Pr of the fan Preset beat frequency period C 1 Fr1 Pr1 C1 2 Fr2 Pr2 C2 3 Fr3 Pr3 C3 4 Fr4 Pr4 C4 5 Fr5 Pr5 C5

[0087] Table 1

[0088] 2. When the compressor frequency and fan speed of the unit run to the corresponding beat frequency point, they are adjusted according to the relationship between the real-time outlet water temperature TW1 and the target water temperature TWS, as follows:

[0089] When |TWS-TW1|>5℃, quickly skip the resonance point Fr±1 frequency range;

[0090] When |TWS-TW1|≤5℃, the compressor frequency is adjusted between Fr±A according to the rule shown in Table 2 below, so that the vibration frequency fluctuation of the compressor suppresses the beat frequency noise between the compressor and the fan, where A can be less than or equal to 3Hz, and D can be less than 1Hz / min.

[0091]

[0092]

[0093] Table 2

[0094] 3. When the compressor enters the fluctuation regulation process, |TWS-TW1|>2 for 20 minutes continuously, and there is no temperature shutdown, then the compressor target frequency is FA=Fr+1;

[0095] When the compressor enters the fluctuation regulation process, |TWS-TW1|≤2, and there is no temperature shutdown, then the compressor maintains the current fluctuation range;

[0096] When the compressor enters the fluctuation regulation process and stops due to reaching the temperature, the compressor target frequency is FA=Fr-1.

[0097] The method for suppressing the beat noise of the air-cooled chilled water heat pump unit based on the above-mentioned embodiments has the following technical effects: First, in the interval where the compressor frequency and the fan speed have a beat frequency, the compressor operating vibration waveform is changed to make it unstable by controlling the compressor frequency to slightly fluctuate, thereby avoiding the formation of a resonance point, and effectively suppressing the beat noise. At the same time, the comfort (constant temperature capability) and noise of the unit are not sacrificed; second, the compressor frequency is slightly fluctuated to suppress the beat noise, effectively reducing the large fluctuations of the system caused by suppressing the beat noise (frequent shutdowns caused by rapid frequency increase / excessive output), which is conducive to the stable operation of the unit and improves the operational reliability.

[0098] Based on the method for suppressing beat noise of an air-cooled chilled water heat pump unit in the above-mentioned embodiments, various embodiments of the controller, air-cooled chilled water heat pump unit, computer-readable storage medium and computer program product of the present application are respectively proposed below.

[0099] like Figure 6 As shown, Figure 6 Schematic diagram of a controller for executing a method for suppressing the beat vibration and abnormal noise of an air-cooled chiller heat pump unit provided by an embodiment of the present application. The controller 700 implemented in the present application includes: a processor 710, a memory 720, and a computer program stored in the memory 720 and executable on the processor 710, wherein: Figure 6 In the figure, a processor 710 and a memory 720 are taken as an example.

[0100] The processor 710 and the memory 720 may be connected via a bus or other means. Figure 6 The example of connecting through bus is taken in the following.

[0101] The memory 720, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer executable programs. In addition, the memory 720 may include a high-speed random access memory, and may also include a non-transitory memory, such as at least one disk storage device, a flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 720 optionally includes a memory 720 remotely arranged relative to the processor 710, and these remote memories 720 can be connected to the controller 700 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0102] Those skilled in the art will understand that Figure 6 The device structure shown in the figure does not constitute a limitation on the controller 700, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0103] exist Figure 6 In the controller 700 shown, the processor 710 can be used to call the control program stored in the memory 720, so as to implement the above-mentioned method for suppressing the beat vibration and abnormal noise of the air-cooled chilled water heat pump unit. Specifically, the non-transient software program and instructions required to implement the method for suppressing the beat vibration and abnormal noise of the air-cooled chilled water heat pump unit in the above-mentioned embodiment are stored in the memory 720, and when executed by the processor 710, the method for suppressing the beat vibration and abnormal noise of the air-cooled chilled water heat pump unit in the above-mentioned embodiment is executed.

[0104] It is worth noting that since the controller 700 of the embodiment of the present application can execute the method for suppressing the beat and abnormal noise of the air-cooled chilled water heat pump unit in any of the above-mentioned embodiments, the specific implementation manner and technical effects of the controller 700 of the embodiment of the present application can refer to the specific implementation manner and technical effects of the method for suppressing the beat and abnormal noise of the air-cooled chilled water heat pump unit in any of the above-mentioned embodiments.

[0105] In addition, an embodiment of the present application further provides an air-cooled chilled water heat pump unit, which includes the controller of the above embodiment.

[0106] It is worth noting that since the air-cooled chilled water heat pump unit of the embodiment of the present application includes the controller of the above-mentioned embodiment, and the controller of the above-mentioned embodiment can execute the method for suppressing the beat and abnormal noise of the air-cooled chilled water heat pump unit of any of the above-mentioned embodiments, the specific implementation manner and technical effects of the air-cooled chilled water heat pump unit of the embodiment of the present application can refer to the specific implementation manner and technical effects of the method for suppressing the beat and abnormal noise of the air-cooled chilled water heat pump unit of any of the above-mentioned embodiments.

[0107] In addition, an embodiment of the present application further provides a computer-readable storage medium, which stores computer-executable instructions, and the computer-executable instructions are used to execute the above-mentioned method for suppressing the beat vibration and abnormal noise of the air-cooled chiller heat pump unit. Figures 2 to 5 The method steps in .

[0108] It is worth noting that since the computer-readable storage medium of the embodiment of the present application can execute the method for suppressing the beat and abnormal noise of the air-cooled chilled water heat pump unit in any of the above-mentioned embodiments, the specific implementation manner and technical effects of the computer-readable storage medium of the embodiment of the present application can refer to the specific implementation manner and technical effects of the method for suppressing the beat and abnormal noise of the air-cooled chilled water heat pump unit in any of the above-mentioned embodiments.

[0109] In addition, an embodiment of the present application further provides a computer program product, including a computer program or computer instructions, the computer program or computer instructions are stored in a computer-readable storage medium, the processor of the computer device reads the computer program or computer instructions from the computer-readable storage medium, and the processor executes the computer program or computer instructions, so that the computer device executes the above-mentioned method for suppressing the beat vibration and abnormal noise of the air-cooled chiller heat pump unit. For example, the above-described Figures 2 to 5 The method steps in .

[0110] It is worth noting that since the computer program product of the embodiment of the present application can execute the method for suppressing the beat and abnormal noise of the air-cooled chilled water heat pump unit in any of the above-mentioned embodiments, the specific implementation manner and technical effects of the computer program product of the embodiment of the present application can refer to the specific implementation manner and technical effects of the method for suppressing the beat and abnormal noise of the air-cooled chilled water heat pump unit in any of the above-mentioned embodiments.

[0111] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed method above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically include computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0112] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0113] In several embodiments provided in the present application, it should be understood that the disclosed systems, apparatuses and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of apparatuses or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the scheme of this embodiment.

[0114] It should also be understood that the various implementations provided in the embodiments of the present application can be combined arbitrarily to achieve different technical effects.

[0115] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above implementation mode. Technical personnel familiar with the field can also make various equivalent modifications or substitutions under the shared conditions without violating the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A method for suppressing the abnormal noise of a wind-cooled chilled water heat pump unit, characterized in that: The air-cooled chilled water heat pump unit comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger and an outdoor fan, wherein a refrigerant circulation loop is formed between the compressor, the indoor heat exchanger and the outdoor heat exchanger, the outdoor fan is arranged on one side of the outdoor heat exchanger, and the indoor heat exchanger is provided with a water cooling pipeline; the method comprises: Acquire at least one set of preset beat vibration parameters of the air-cooled chiller heat pump unit during the period when the beat vibration abnormal sound is generated, wherein each set of the preset beat vibration parameters includes a preset beat vibration frequency of the compressor and / or a preset beat vibration speed of the fan; When the real-time parameter of the air-cooled chilled water heat pump unit reaches the preset beat parameter, the real-time outlet water temperature of the water cooling pipeline is collected; Determine the outlet water temperature difference between the preset target outlet water temperature and the real-time outlet water temperature, and adjust the operating frequency of the compressor according to the outlet water temperature difference.

2. The method according to claim 1, characterized in that The step of adjusting the operating frequency of the compressor according to the outlet water temperature difference comprises: When the outlet water temperature difference is greater than a first preset difference, the operating frequency of the compressor is adjusted so that the operating frequency of the compressor is outside the beat frequency interval, wherein the beat frequency interval is determined by the preset beat frequency, the preset beat frequency is within the beat frequency interval, and one beat frequency interval corresponds to one preset beat frequency.

3. The method according to claim 1, characterized in that The step of adjusting the operating frequency of the compressor according to the outlet water temperature difference comprises: When the outlet water temperature difference is less than or equal to a first preset difference, determining a target frequency amplitude and a target frequency adjustment speed corresponding to the preset beat vibration parameter, wherein one preset beat vibration parameter corresponds to one frequency amplitude and one frequency adjustment speed; The operating frequency of the compressor is adjusted according to the target frequency amplitude and the target frequency adjustment speed.

4. The method according to claim 3, characterized in that The method further comprises: In the process of adjusting the operating frequency of the compressor according to the target frequency amplitude and the target frequency adjustment speed, obtaining the start / stop state of the air-cooled chilled water heat pump unit; The operating frequency of the compressor is adjusted according to the outlet water temperature difference and the start / stop state of the unit.

5. The method according to claim 4, characterized in that The step of adjusting the operating frequency of the compressor according to the outlet water temperature difference and the start / stop state of the unit includes: When the outlet water temperature difference is maintained between the first preset difference and the second preset difference for a preset period of time and the air-cooled chiller heat pump unit does not shut down due to reaching the temperature, the operating frequency of the compressor is increased, wherein the second preset difference is smaller than the first preset difference.

6. The method according to claim 5, characterized in that The step of adjusting the operating frequency of the compressor according to the outlet water temperature difference and the start / stop state of the unit includes: When the outlet water temperature difference is less than or equal to the second preset difference and the air-cooled chiller heat pump unit does not shut down due to reaching the temperature, the operating frequency of the compressor is maintained adjusted according to the target frequency amplitude and the target frequency adjustment speed.

7. The method according to claim 5, characterized in that The step of adjusting the operating frequency of the compressor according to the outlet water temperature difference and the start / stop state of the unit includes: When the air-cooled chiller heat pump unit reaches a certain temperature and shuts down, the operating frequency of the compressor is reduced.

8. The method according to claim 1, characterized in that The determining of the outlet water temperature difference between the preset target outlet water temperature and the real-time outlet water temperature includes: When the air-cooled chiller heat pump unit executes a heating mode, the difference between the target outlet water temperature and the real-time outlet water temperature is used as the outlet water temperature difference; When the air-cooled chilled water heat pump unit executes the cooling mode, the difference between the real-time outlet water temperature and the target outlet water temperature is used as the outlet water temperature difference.

9. A controller, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the method for suppressing the beat noise of an air-cooled chilled water heat pump unit as described in any one of claims 1 to 8 when executing the computer program.

10. An air-cooled chilled water heat pump unit, characterized in that: Comprising a controller as claimed in claim 9.

11. A computer-readable storage medium, characterized in that: Computer executable instructions are stored, and the computer executable instructions are used to execute the method for suppressing beat noise of an air-cooled chilled water heat pump unit as described in any one of claims 1 to 8.

12. A computer program product, comprising a computer program or computer instructions, characterized in that The computer program or the computer instructions are stored in a computer-readable storage medium, and the processor of a computer device reads the computer program or the computer instructions from the computer-readable storage medium. The processor executes the computer program or the computer instructions, so that the computer device executes the method for suppressing beat noise of an air-cooled chilled water heat pump unit as described in any one of claims 1 to 8.

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