Pulse tube refrigerator cold head wireless frequency modulation device and pulse tube refrigerator system

Abstract

The utility model relates to the technical field of pulse tube refrigerators, and provides a pulse tube refrigerator cold head wireless frequency modulation device and a pulse tube refrigerator system.The pulse tube refrigerator cold head wireless frequency modulation device comprises a cold head driving module used for being connected with a cold head of a pulse tube refrigerator; the pulse generation module is connected with the cold head driving module, and the pulse generation module is used for generating a pulse signal; and the wireless frequency modulation module is connected with the pulse generation module, and the wireless frequency modulation module is used for acquiring a control instruction of external control equipment based on wireless communication so as to adjust the frequency of the pulse signal generated by the pulse generation module. Through the cold head driving module, the pulse generation module and the wireless frequency modulation module, the function of remotely and wirelessly adjusting the working frequency of the cold head is achieved, the adjusting operation is more convenient and flexible, remote wireless adjustment can be conducted in the working process of the pulse tube refrigerator, the debugging process is simpler, more convenient and more efficient, the working frequency is accurately adjusted in real time, and the working efficiency is improved. And the efficiency and precision of frequency adjustment are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pulse tube refrigerator, especially to a kind of pulse tube refrigerator cold head wireless frequency modulation device and pulse tube refrigerator system. BACKGROUND

[0002] Pulse tube refrigerator realizes refrigeration by the compression and expansion process of gas, for single refrigeration cycle, including intake time, exhaust time and time interval between the two, timing is exhaust and intake time ratio, i.e. the time ratio of gas expansion and compression inside the refrigerator, frequency and timing are important parameters of pulse tube refrigerator, and they have great influence on the performance of refrigerator. Different structure sizes of pulse tube refrigerator all have a best working frequency and best timing, even for the same size of pulse tube refrigerator, due to the difference of processing error and regenerative material filling mode, its best working frequency and timing also have difference.

[0003] However, the pulse tube refrigerator in the prior art needs to be manually operated on the pulse tube control machine body to adjust the working frequency, and there are problems of inconvenient adjustment and poor flexibility, and due to safety and other factors, the pulse tube refrigerator usually needs to be completely stopped for adjustment, and the debugging process is cumbersome and cannot be adjusted in real time, resulting in the problems of the need for multiple adjustments and low adjustment accuracy. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of pulse tube refrigerator cold head wireless frequency modulation device and pulse tube refrigerator system to solve the problem that pulse tube refrigerator in the prior art needs to be operated on the body to adjust operation, leading to the problems of inconvenient adjustment and adjustment cumbersome.

[0005] The utility model provides a kind of pulse tube refrigerator cold head wireless frequency modulation device, comprising:

[0006] Cold head drive module is used to be connected with the cold head of pulse tube refrigerator;

[0007] Pulse generation module is connected with the cold head drive module, and the pulse generation module is used to generate pulse signal;

[0008] Wireless frequency modulation module is connected with the pulse generation module, and the wireless frequency modulation module is used to obtain the control instruction of external control equipment based on wireless communication to adjust the frequency of the pulse signal generated by the pulse generation module.

[0009] According to the utility model provides a kind of pulse tube refrigerator cold head wireless frequency modulation device, the pulse generation module includes timer unit and level conversion unit, the timer unit is connected with the wireless frequency modulation module and the level conversion unit respectively, and the level conversion unit is connected with the cold head drive module.

[0010] The wireless frequency modulation device of the pulse tube refrigerator cold head provided by the utility model has the advantages that the wireless frequency modulation device is connected with the pulse generation module and the control device, and the wireless frequency modulation device can be used for wireless frequency modulation of the pulse tube refrigerator cold head.

[0011] The first wireless receiving and transmitting unit comprises a first radio frequency circuit and a serial communication circuit, and the serial communication circuit is connected with the first radio frequency circuit and the pulse generation module.

[0012] The second wireless receiving and transmitting unit comprises a second radio frequency circuit and a communication interface, the communication interface is connected with the second radio frequency circuit, and the communication interface is used for detachably connecting with the control device.

[0013] The first radio frequency circuit comprises a first transmitting modulation circuit, a first receiving demodulation circuit and a first 2.4G antenna, the serial communication circuit is connected with the first transmitting modulation circuit and the first receiving demodulation circuit, and the first transmitting modulation circuit and the first receiving demodulation circuit are connected with the first 2.4G antenna.

[0014] The second radio frequency circuit comprises a second transmitting modulation circuit, a second receiving demodulation circuit and a second 2.4G antenna, the communication interface is connected with the second transmitting modulation circuit and the second receiving demodulation circuit, and the second transmitting modulation circuit and the second receiving demodulation circuit are connected with the second 2.4G antenna.

[0015] The serial communication circuit is a UART communication circuit, and the communication interface comprises a USB interface.

[0016] The utility model also provides a kind of pulse tube refrigerator system, including the wireless frequency modulation device of one kind of pulse tube refrigerator cold head described above, further include cold head, compressor, pulse tube component and control device, the cold head is connected with the compressor and the pulse tube component respectively, the cold head drive module is connected with the compressor, and the control device is connected with the wireless frequency modulation module.

[0017] The cold head comprises a rotary valve, and the cold head drive module is connected with the rotary valve to drive the rotary valve to rotate.

[0018] According to the pulse tube refrigerator system, the pulse tube assembly comprises a regenerator, a pulse tube body, a hot end heat exchanger and a cold end heat exchanger, the regenerator is communicated with a cold head and the pulse tube body respectively, the cold end heat exchanger is arranged between the pulse tube body and the regenerator, and the hot end heat exchanger is arranged at the other end of the pulse tube body away from the cold end heat exchanger.

[0019] The utility model provides a kind of pulse tube refrigerator cold head wireless frequency modulation device and pulse tube refrigerator system, at least have beneficial effect: the control instruction of external control equipment is obtained based on wireless communication by wireless frequency modulation module, to adjust the frequency of pulse signal generated by pulse generation module, and then cold head drive module drives the cold head of pulse tube refrigerator to work under the action of pulse signal, so that the cold head operating frequency of pulse tube refrigerator corresponds with the frequency of pulse signal, reaches the effect of remote wireless frequency modulation. Therefore, by the structure of cold head drive module, pulse generation module and wireless frequency modulation module, the function of remotely wirelessly adjusting the cold head operating frequency of pulse tube refrigerator is realized, without manual operation close to pulse tube refrigerator, it is convenient and flexible to adjust operation, and remote wireless adjustment can be adjusted during the working process of pulse tube refrigerator, make debugging process more simple and efficient, simultaneously, work frequency can be adjusted in real time accurately, it is favorable to improve the efficiency and precision of frequency regulation. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the utility model or prior art, the following will be a simple introduction to the drawings needed to be used in embodiment or prior art description, obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0021] Figure 1 It is one of structural block schematic diagram of the utility model provides a kind of pulse tube refrigerator cold head wireless frequency modulation device.

[0022] Figure 2 It is the second structural block schematic diagram of the utility model provides a kind of pulse tube refrigerator cold head wireless frequency modulation device.

[0023] Figure 3 It is the structural schematic diagram of the utility model provides a kind of pulse tube refrigerator system.

[0024] Figure 4 It is the structural schematic diagram of compressor, cold head and pulse tube assembly in the utility model provides a kind of pulse tube refrigerator system.

[0025] Reference signs:

[0026] 100: Cold head drive module; 200: Pulse generation module; 210: Timer unit; 220: Level conversion unit; 300: Wireless frequency modulation module; 310: First wireless transceiver unit; 311: First radio frequency circuit; 312: Serial communication circuit; 320: Second wireless transceiver unit; 321: Second radio frequency circuit; 322: Communication interface; 400: Cold head; 500: Compressor; 600: Pulse tube assembly; 610: Regenerator; 620: Pulse tube body; 630: Hot end heat exchanger; 640: Cold end heat exchanger; 700: Control device. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] The following is combined Figures 1-3 This invention describes a wireless frequency modulation device for a pulse tube refrigerator cold head, comprising:

[0029] The cold head drive module 100 is used to connect to the cold head 400 of the pulse tube refrigerator;

[0030] A pulse generation module 200 is connected to the cold head drive module 100, and the pulse generation module 200 is used to generate pulse signals;

[0031] The wireless frequency modulation module 300 is connected to the pulse generation module 200. The wireless frequency modulation module 300 is used to obtain control commands from the external control device 700 based on wireless communication in order to adjust the frequency of the pulse signal generated by the pulse generation module 200.

[0032] The wireless frequency modulation module 300 obtains control commands from the external control device 700 via wireless communication to adjust the frequency of the pulse signal generated by the pulse generation module 200. Then, the cold head drive module 100 drives the cold head 400 of the pulse tube refrigerator to work under the action of the pulse signal, so that the working frequency of the cold head 400 of the pulse tube refrigerator corresponds to the frequency of the pulse signal, achieving the effect of remote wireless frequency modulation.

[0033] Therefore, by the structure of the cold head driving module 100, the pulse generation module 200 and the wireless frequency modulation module 300, the function of remotely and wirelessly adjusting the working frequency of the cold head 400 of the pulse tube refrigerator is realized, manual operation close to the pulse tube refrigerator is not needed, the adjustment operation is more convenient and flexible, the remote and wireless adjustment can be performed during the working process of the pulse tube refrigerator, the debugging process is more simple and efficient, the working frequency can be accurately adjusted in real time, and the efficiency and precision of frequency adjustment are improved.

[0034] In the related art, frequency modulation is adjusted inside the compressor, and the wireless frequency modulation device of the cold head of the pulse tube refrigerator provided in the scheme can realize frequency modulation in an external and remote and wireless manner, the convenience and efficiency of frequency modulation are improved, and the frequency modulation operation is more efficient and fast.

[0035] The pulse tube refrigerator usually comprises a compressor 500, a cold head 400 and a pulse tube assembly 600, the cold head 400 is connected with the compressor 500 and the pulse tube assembly 600, the compressor 500 is used for compressing gas, the cold head 400 can comprise a rotary valve, the rotary valve is controlled to control the sealed state of the gas entering the pulse tube assembly 600, the gas discharging from the pulse tube assembly 600 or between the two, the rotary frequency of the rotary valve is controlled, that is, the working frequency of the cold head 400 is adjusted, and the refrigeration process of the pulse tube refrigerator is adjusted. The wireless frequency modulation module 300 adjusts the frequency of the pulse signal generated by the pulse generation module 200, and the cold head driving module 100 drives the cold head 400 of the pulse tube refrigerator to work according to the pulse signal. When the cold head 400 works at the optimal working frequency by adjusting the frequency of the pulse signal of the pulse generation module 200, the pulse tube refrigerator has the optimal refrigeration efficiency.

[0036] In some embodiments of the utility model, the cold head 400 of the pulse tube refrigerator comprises a rotary valve, the cold head driving module 100 can comprise a motor driving circuit and a stepping motor, the stepping motor is connected with the rotary valve to accurately drive the rotary valve to rotate, the motor driving circuit is connected with the stepping motor to control the rotation angle of the stepping motor, so as to drive the rotary valve to work at the specified rotary frequency, and the working frequency of the cold head 400 is controlled. In some embodiments, the rotary valve of the cold head 400 is provided with a motor, and the cold head driving module 100 can comprise a motor driving circuit.

[0037] Reference Figure 1 In some embodiments of the utility model, the pulse generation module 200 comprises a timer unit 210 and a level conversion unit 220, the timer unit 210 is connected with the wireless frequency modulation module 300 and the level conversion unit 220 respectively, and the level conversion unit 220 is connected with the cold head driving module 100.

[0038] The timer unit 210 generates a signal according to a set timing interval to form a frequency signal, and the frequency signal is transmitted to the level conversion unit 220, and the level conversion unit 220 converts the level of the frequency signal into a suitable and stable level to form a pulse signal for controlling the cold head driving module 100. In this way, based on the structure of the timer unit 210 and the level conversion unit 220, the function of pulse generation is realized, the structure is simple and easy to implement, and the level conversion unit 220 can make the level of the pulse signal more stable and reliable.

[0039] In some embodiments of the utility model, the timer unit 210 can be implemented by using a single-chip microcomputer, and the function of generating a signal at a time is realized by using the integrated timer in the single-chip microcomputer. In some embodiments, it can also be implemented by using a timer circuit and the like.

[0040] In some embodiments of the utility model, the level conversion unit 220 can include a level conversion circuit, a level conversion chip and the like. In some embodiments of the utility model, the level conversion unit 220 can include an SN74LVC4245APWR chip. In some embodiments of the utility model, the level conversion unit 220 can convert a frequency pulse of 3.3V into a pulse signal of 5V.

[0041] Reference Figure 1 And Figure 2 In some embodiments of the utility model, the wireless frequency modulation module 300 includes a first wireless transceiver unit 310 and a second wireless transceiver unit 320, the first wireless transceiver unit 310 is connected with the pulse generation module 200, and the second wireless transceiver unit 320 is used for being connected with an external control device 700.

[0042] The second wireless transceiver unit 320 is connected with the external control device 700, when it is necessary to adjust the working frequency of the pulse tube refrigerator, the external control device 700 generates an adjustment instruction and transmits it to the second wireless transceiver unit 320, the second wireless transceiver unit 320 converts the adjustment instruction into a wireless signal and sends it to the first wireless transceiver unit 310, the first wireless transceiver unit 310 restores the wireless signal into the adjustment instruction and transmits it to the pulse generation module 200, so that the pulse generation module 200 adjusts the frequency of the generated pulse signal according to the adjustment instruction. In this way, through the structure of the first wireless transceiver unit 310 and the second wireless transceiver unit 320, the first wireless transceiver unit 310 and the second wireless transceiver unit 320 correspond to wireless communication, so as to realize the function of remote wireless control.

[0043] In some embodiments of the utility model, still can include connecting row pin and connecting female seat, connecting row pin is connected with first wireless receiving unit 310, connecting female seat is connected with pulse generating module 200, connecting row pin is connected with connecting female seat to realize the connection between first wireless receiving unit 310 and pulse generating module 200. Through the structure of connecting row pin and connecting female seat, the installation position of first wireless receiving unit 310 and pulse generating module 200 can be more flexibly set.

[0044] In some embodiments of the utility model, first wireless receiving unit 310 and second wireless receiving unit 320 are matched with each other, first identification information can be stored in first wireless receiving unit 310, and / or second identification information is stored in second wireless receiving unit 320, first wireless receiving unit 310 and second wireless receiving unit 320 are identified and matched according to first identification information and second identification information, and wireless communication is established. In some embodiments, first identification information and second identification information can be MAC address.

[0045] In some embodiments of the utility model, after pulse generating module 200 completes frequency adjustment according to adjustment instruction, response instruction can be generated and transmitted to first wireless receiving unit 310, so that response instruction is fed back to control device 700 through wireless communication, and control device 700 knows that frequency adjustment has been completed.

[0046] Reference Figure 1 In some embodiments of the utility model, first wireless receiving unit 310 includes first radio frequency circuit 311 and serial communication circuit 312, serial communication circuit 312 is connected with first radio frequency circuit 311 and pulse generating module 200 respectively.

[0047] After first radio frequency circuit 311 obtains wireless signal and converts adjustment instruction, adjustment instruction is transmitted to pulse generating module 200 through serial communication circuit 312, so that pulse generating module 200 adjusts the frequency of generated pulse signal according to adjustment instruction. The structure of serial communication circuit 312 has the advantages of strong anti-interference ability, less resource occupation, low power consumption and the like, which is conducive to making pulse generating module 200 generate pulse signal with required frequency more accurately.

[0048] Reference Figure 1 In some embodiments of the utility model, second wireless receiving unit 320 includes second radio frequency circuit 321 and communication interface 322, communication interface 322 is connected with second radio frequency circuit 321, and communication interface 322 is used for detachably connecting with control device 700.

[0049] The control device 700 is connected with the communication interface 322 to be connected with the second radio frequency circuit 321 through the communication interface 322, and the control device 700 generates a control instruction transmitted to the second radio frequency circuit 321 through the communication interface 322, and the second radio frequency circuit 321 converts the control instruction into a corresponding wireless signal for sending. Through the structure provided with the communication interface 322, different control devices 700 can be conveniently connected, different control devices 700 can be flexibly used to realize remote wireless control, and use is more convenient.

[0050] In some embodiments of the utility model, the communication interface 322 can include the implementation of interfaces such as USB interfaces. It can be understood that the communication interface 322 includes the communication processing circuit corresponding to the interface, such as the USB processing circuit corresponding to the USB interface.

[0051] In some embodiments of the utility model wireless frequency modulation device for pulse tube refrigerator cold head, the first radio frequency circuit 311 includes a first transmitting modulation circuit, a first receiving demodulation circuit and a first 2.4G antenna, the serial communication circuit 312 is connected with the first transmitting modulation circuit and the first receiving demodulation circuit respectively, and the first transmitting modulation circuit and the first receiving demodulation circuit are connected with the first 2.4G antenna.

[0052] The second radio frequency circuit 321 includes a second transmitting modulation circuit, a second receiving demodulation circuit and a second 2.4G antenna, and the communication interface 322 is connected with the second transmitting modulation circuit and the second receiving demodulation circuit respectively, and the second transmitting modulation circuit and the second receiving demodulation circuit are connected with the second 2.4G antenna.

[0053] In the first radio frequency circuit 311, the first transmitting modulation circuit converts the signal into a wireless signal for transmitting through the first 2.4G antenna after modulating the signal, and the first receiving demodulation circuit obtains the wireless signal through the first 2.4G antenna to demodulate to recover the signal, realizing the transmission and reception of wireless signals; similarly, in the second radio frequency circuit 321, the second transmitting modulation circuit and the second receiving demodulation circuit also realize the transmission and reception of wireless signals through the second 2.4G antenna. In this way, the first radio frequency circuit 311 and the second radio frequency circuit 321 transmit wireless signals through the 2.4G antenna, that is, the 2.4G frequency band, have strong anti-interference ability, are suitable for various complex industrial environments, are conducive to making the transmission of frequency modulation commands more stable and reliable, and further make the adjustment of the cold head 400 of the pulse tube refrigerator more stable and reliable.

[0054] In some embodiments of the utility model, first emission modulation circuit includes first modulator, first up converter and first power amplifier, serial communication circuit 312, first modulator, first up converter, first power amplifier and first 2.4G antenna are connected in proper order;First receiving demodulation circuit includes first demodulator, first filter, first down converter and first amplifier, serial communication circuit 312, first demodulator, first filter, first down converter, first amplifier and first 2.4G antenna are connected in proper order.

[0055] In some embodiments of the utility model pulse tube refrigerator cold head wireless frequency modulation device, serial communication circuit 312 is UART communication circuit, and the communication interface 322 includes USB interface.

[0056] The utility model provides a kind of pulse tube refrigerator system control method below is described, the pulse tube refrigerator system control method described below in the following description can be mutually corresponding with the pulse tube refrigeration system described above with reference.

[0057] Reference Figure 3 The utility model also provides a kind of pulse tube refrigerator system, including the wireless frequency modulation device of one kind of pulse tube refrigerator cold head described above, still include cold head 400, compressor 500, pulse tube assembly 600 and control device 700, the cold head 400 is connected with the compressor 500 and the pulse tube assembly 600 respectively, the cold head drive module 100 is connected with the compressor 500, and the control device 700 is connected with the wireless frequency modulation module 300.

[0058] Compressor 500 is used to compress gas, and cold head 400 controls the frequency of gas entering and discharging pulse tube assembly 600, so that pulse tube assembly 600 realizes refrigeration function.Control device 700 is connected with wireless frequency modulation module 300, when the working frequency of cold head 400 needs to be adjusted, control device 700 generates control instruction, wireless frequency modulation module 300 obtains the control instruction of control device 700, and based on wireless communication, control instruction is transmitted to pulse generating module 200, so that pulse generating module 200 adjusts the frequency of generated pulse signal under the action of control instruction, and then cold head drive module 100 drives cold head 400 to work under the action of pulse signal, so that the working frequency of cold head 400 corresponds to the frequency of pulse signal, and the effect of remote wireless frequency modulation is achieved.

[0059] In this way, by the structure of the cold head driving module 100, the pulse generation module 200 and the wireless frequency modulation module 300, the function of remotely and wirelessly adjusting the working frequency of the cold head 400 is realized, without the need to manually operate close to the pulse tube refrigerator, which is beneficial to make the adjustment operation more convenient and flexible, and the remote and wireless adjustment can be adjusted during the working process of the pulse tube refrigerator, which makes the debugging process more simple and efficient, and can accurately adjust the working frequency in real time, which is beneficial to improve the efficiency and precision of frequency adjustment.

[0060] Based on the working of the compressor 500, by periodically compressing and expanding the gas, alternating high and low pressure waves are generated, the gas enters and exits the pulse tube, and a temperature gradient is formed between the cold end and the hot end of the pulse tube, and the cold head 400 adjusts the timing and frequency of the gas entering and exiting, so that the cold end of the pulse tube continuously absorbs heat and conducts to the hot end of the pulse tube to release, achieving the effect of refrigeration.

[0061] Reference Figure 3 In some embodiments of the present application, the compressor can be arranged in the cabinet, and the wireless frequency modulation device for the cold head of the pulse tube refrigerator provided by the present application can also be arranged in the cabinet. In some embodiments of the present application, the control device 700 can be an embodiment of a device having a control function, such as a computer or a master controller.

[0062] Reference Figure 4 In some embodiments of the pulse tube refrigeration system of the present application, the cold head 400 comprises a rotary valve, and the cold head driving module 100 is connected with the rotary valve to drive the rotary valve to rotate.

[0063] The cold head driving module 100 controls the rotation speed of the rotary valve under the action of the pulse signal, and can control the frequency of the gas entering and exiting the pulse tube assembly 600. The cold head driving module 100 can accurately control the rotation angle of the rotary valve under the action of the pulse signal, which is convenient for accurately controlling the phase of gas expansion and compression, and also can accurately control the rotation speed of the rotary valve, which is beneficial to accurately control the working frequency of the cold head 400.

[0064] The cold head 400 adopts the structure of the rotary valve, which has the advantages of simple structure and high reliability, and is convenient for accurately and stably controlling the entering and exiting of the gas.

[0065] Reference Figure 4In some embodiments of the pulse tube refrigeration system, the pulse tube assembly 600 comprises a regenerator 610, a pulse tube body 620, a hot end heat exchanger 630 and a cold end heat exchanger 640, the regenerator 610 is in communication with the cold head 400 and the pulse tube body 620 respectively, the cold end heat exchanger 640 is arranged between the pulse tube body 620 and the regenerator 610, and the hot end heat exchanger 630 is arranged at the other end of the pulse tube body 620 away from the cold end heat exchanger 640.

[0066] When the gas is inhaled, the gas is preliminarily cooled by the regenerator 610 and enters the pulse tube body 620, the gas in the pulse tube body 620 is compressed and heated, the temperature of the end of the pulse tube body 620 away from the regenerator 610 is the highest and serves as a hot end, and heat is dissipated through the hot end heat exchanger 630; when the gas is exhaled, the gas in the pulse tube body 620 expands and is discharged through the regenerator 610, the gas is cooled by heat absorption during expansion, the temperature of the end of the pulse tube body 620 close to the regenerator 610 is the lowest and serves as a cold end, and the cold end heat exchanger 640 provides refrigeration capacity, and the temperature of the expanded and discharged gas is relatively lower than that when the gas is inhaled, so that the temperature of the regenerator 610 is reduced to facilitate preliminary cooling of the gas for the next round of inhalation. The temperature gradient is formed between the cold end and the hot end in the pulse tube body 620, the heat absorbed by the cold end is dissipated from the hot end, and the cold end realizes refrigeration. The regenerator 610 recovers the refrigeration capacity of the cold end to preliminarily cool the gas for inhalation, which is beneficial to improve the refrigeration efficiency.

[0067] In some embodiments of the utility model, pulse generation module 200 includes singlechip and level conversion unit 220, wireless frequency modulation module 300 includes first radio frequency circuit 311, serial communication circuit 312, second radio frequency circuit 321 and communication interface 322. When using, communication interface 322 is connected with control equipment 700, to make control equipment 700 connect with second radio frequency circuit 321;Start compressor 500, wireless frequency modulation module 300, pulse generation module 200 and cold head drive module 100, and the first radio frequency circuit 311 and the second radio frequency circuit 321 between pairing establish wireless communication. When needing frequency modulation, control equipment 700 generates frequency modulation instruction, and the frequency modulation instruction can include "frame header + channel + speed + frame tail" and the like, and the frequency modulation instruction is converted into corresponding wireless signal and sent through the second radio frequency circuit 321;The first radio frequency circuit 311 receives and obtains wireless signal and converts and recovers into frequency modulation instruction, and the frequency modulation instruction is transmitted to the singlechip, the singlechip analyzes the frequency modulation instruction, obtains channel and speed information, generates pulse signal of corresponding frequency according to the speed information and transmits to cold head drive module 100, and then adjusts the working frequency of the cold head 400, to achieve the effect of remote wireless frequency modulation.

[0068] In some embodiments of the utility model, the single-chip microcomputer obtains the actual working frequency of the cold head 400 after adjusting the working frequency of the cold head 400, generates a response instruction, the response instruction can include information such as "SUCCES + channel + RPM + rotating speed", and is transmitted to the control device 700 in a wireless communication mode through the first radio frequency circuit 311 and the second radio frequency circuit 321, so that the control device 700 learns that the frequency modulation is successful and obtains information such as the working frequency of the cold head 400.

[0069] In the description of the utility model, it is to be understood that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0070] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0071] All the actions of obtaining signals, information or data in this application are carried out in accordance with the corresponding data protection regulations and policies of the place, and with the authorization given by the corresponding device owner.

[0072] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical scheme of the utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the spirit and scope of the technical scheme of each embodiment of the utility model.

Claims

1. A wireless frequency modulation device for a pulse tube cryocooler cold head, characterized by, The application relates to a cold head driving module (100) for connecting with a cold head (400) of a pulse tube refrigerator, a pulse generation module (200) connected with the cold head driving module (100), the pulse generation module (200) being used for generating a pulse signal, and a wireless frequency modulation module (300) connected with the pulse generation module (200), the wireless frequency modulation module (300) being used for acquiring a control instruction of an external control device (700) based on wireless communication to adjust the frequency of the pulse signal generated by the pulse generation module (200). The pulse generation module (200) comprises a timer unit (210) and a level conversion unit (220), the timer unit (210) being connected with the wireless frequency modulation module (300) and the level conversion unit (220) respectively, and the level conversion unit (220) being connected with the cold head driving module (100). The wireless frequency modulation module (300) comprises a first wireless transceiver unit (310) and a second wireless transceiver unit (320), the first wireless transceiver unit (310) being connected with the pulse generation module (200), and the second wireless transceiver unit (320) being used for connecting with an external control device (700). The first wireless transceiver unit (310) comprises a first radio frequency circuit (311) and a serial communication circuit (312), the serial communication circuit (312) being connected with the first radio frequency circuit (311) and the pulse generation module (200) respectively.

2. A wireless frequency modulation device for a pulse tube cryocooler cold head according to claim 1, wherein The second wireless transceiver unit (320) comprises a second radio frequency circuit (321) and a communication interface (322), the communication interface (322) being connected with the second radio frequency circuit (321), and the communication interface (322) being used for detachably connecting with a control device (700).

3. A wireless frequency modulation device for a pulse tube cryocooler cold head according to claim 2, wherein The first radio frequency circuit (311) comprises a first transmitting modulation circuit, a first receiving demodulation circuit and a first 2.4G antenna, the serial communication circuit (312) being connected with the first transmitting modulation circuit and the first receiving demodulation circuit respectively, and the first transmitting modulation circuit and the first receiving demodulation circuit being connected with the first 2.4G antenna; 4. A wireless frequency modulation device for a pulse tube cryocooler cold head according to claim 3, wherein The second radio frequency circuit (321) comprises a second transmitting modulation circuit, a second receiving demodulation circuit and a second 2.4G antenna, the communication interface (322) being connected with the second transmitting modulation circuit and the second receiving demodulation circuit respectively, and the second transmitting modulation circuit and the second receiving demodulation circuit being connected with the second 2.4G antenna.

5. A wireless frequency modulation device for a pulse tube cryocooler cold head according to claim 4, wherein The serial communication circuit (312) is a UART communication circuit, and the communication interface (322) comprises a USB interface.

6. A wireless frequency modulation device for a pulse tube cryocooler cold head according to claim 5, wherein ​ ​ 7. A wireless frequency modulation device for a pulse tube cryocooler cold head according to claim 5, wherein ​ 8. A pulse tube refrigerator system, characterized by, The wireless frequency modulation device for a pulse tube refrigerator cold head according to any one of claims 1 to 7, further comprising a cold head (400), a compressor (500), a pulse tube assembly (600), and a control device (700), wherein the cold head (400) is connected with the compressor (500) and the pulse tube assembly (600) respectively, the cold head driving module (100) is connected with the compressor (500), and the control device (700) is connected in communication with the wireless frequency modulation module (300).

9. A pulse tube refrigerator system according to claim 8, wherein The cold head (400) comprises a rotary valve, and the cold head driving module (100) is connected with the rotary valve to drive the rotary valve to rotate.

10. A pulse tube refrigerator system according to claim 8, wherein The pulse tube assembly (600) comprises a regenerator (610), a pulse tube body (620), a hot end heat exchanger (630), and a cold end heat exchanger (640), wherein the regenerator (610) is connected with the cold head (400) and the pulse tube body (620) respectively, the cold end heat exchanger (640) is arranged between the pulse tube body (620) and the regenerator (610), and the hot end heat exchanger (630) is arranged at the other end of the pulse tube body (620) away from the cold end heat exchanger (640).

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