Two-stage heat exchange heat pump system suitable for ice bath and ice bath device with two-stage heat exchange heat pump system

Abstract

The utility model provides a two-stage heat exchange heat pump system suitable for an ice bath and an ice bath device with the two-stage heat exchange heat pump system, and relates to the technical field of refrigerating water bath equipment. According to the system, the low-temperature refrigerating device, the primary refrigerant circulating device and the low-temperature water circulating device are arranged, heat exchange is conducted between a primary refrigerant in the low-temperature refrigerating device, the primary refrigerant circulating device and a secondary refrigerant, the problem that in the large-temperature-difference heat transfer process, the heat exchange temperature difference is not uniform is solved, the heat exchange consistency and stability are guaranteed, and the heat exchange efficiency is improved. The shackle of lowest temperature limitation of direct heat exchange between a refrigerant and a secondary refrigerant in an existing cold water bath is broken through, for example, under the condition that the secondary refrigerant is water, the lowest temperature in the prior art can only reach 3 DEG C, the system can ensure that the secondary refrigerant in the secondary refrigerant container reaches the set temperature of 0 DEG C, the system can stably exchange heat, and the heat exchange efficiency is improved. The problems that in the prior art, system ice blockage is likely to be generated, and consequently system heat exchange parts are damaged are solved, the system operation reliability is improved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration water bath equipment, in particular to a two-stage heat exchange heat pump system suitable for ice baths and an ice bath device with the system. Background Art

[0002] Refrigeration systems are widely used in the chemical, pharmaceutical, and electronics industries, as well as in scientific research. In the chemical industry, many chemical reactions in production processes require specific low-temperature conditions, placing high demands on refrigeration systems. The pharmaceutical industry has very strict temperature requirements for the production and storage of pharmaceutical products. The freeze-drying process for some pharmaceuticals requires the use of chillers to provide a low-temperature environment. The manufacturing of electronic chips in the electronics industry requires an ultra-clean, constant-temperature environment. Some scientific research experiments require precise temperature control.

[0003] The common characteristics of these application areas are: 1) the need for specific low-temperature environmental conditions; 2) the need to ensure temperature stability and accuracy; and 3) the need for high reliability of the entire system. As consumers' understanding of the products continues to deepen, they are also developing a demand for chillers with high-precision temperature control and high reliability, which is driving product upgrades.

[0004] Currently, most refrigeration systems on the market use a single-stage refrigeration system, consisting of an evaporator, a single-stage compressor, a condenser, a throttle valve, and other ancillary equipment. These systems feature a simple structure, a small number of components, relatively easy installation and maintenance, and low cost. Under normal operating conditions, they operate stably with a relatively low probability of failure, meeting cooling needs for general temperature requirements. However, existing technologies have significant drawbacks: 1) They have a narrow operating range: their adaptability to ambient temperature and load fluctuations is limited, and they may not operate stably under extreme conditions. Due to the temperature constraints of the heat exchange fluid, for example, the minimum temperature of liquid water is 0°C, and maintaining a constant water temperature is extremely difficult. Chillers are typically designed for a minimum temperature of 3°C. This makes extreme operating conditions, such as when customers require a water temperature near 0°C, difficult to achieve. 2) They place relatively high demands on system control: Under certain operating conditions, particularly those with high temperature differences and heavy loads, the control of the bathtub's circulating water pump and chiller becomes crucial. If the water flow is too low, it cannot carry away the cooling capacity generated by the chiller, which may easily cause ice blockage and damage system components; or if the cooling speed is too fast and the cooling speed cannot be slowed down in time when the set temperature is reached, it will cause ice blockage inside the system, thereby damaging system equipment and other faults. Utility Model Content

[0005] In response to the shortcomings of the prior art, the first object of the present invention is to provide a two-stage heat exchange heat pump system suitable for ice baths that can slowly and steadily allow the water temperature to reach the limit temperature of 0°C, meeting the requirements for high-precision water temperature control. The purpose of the present invention is achieved through the following technical solutions: A two-stage heat exchange heat pump system suitable for ice baths, comprising a low-temperature refrigeration device, a primary refrigerant circulation device, and a secondary refrigerant circulation device;

[0006] The low-temperature refrigeration device is provided with a refrigerant, the primary refrigerant circulation device is provided with a primary refrigerant, and the secondary circulation device includes a secondary refrigerant;

[0007] The primary refrigerant is used for heat exchange with the refrigerant and the secondary refrigerant.

[0008] The above technical solution makes it easy to ensure that the secondary refrigerant in the system can stably reach the set temperature, especially in the process of heat transfer with a large temperature difference, which ensures the consistency and stability of heat exchange, ensures sufficient energy transfer, and can quickly and stably reach 0°C, avoiding problems such as system ice blockage that is easy to occur in the existing technology, leading to damage to the system's heat exchange components, and improving the reliability of system operation.

[0009] Preferably, the low-temperature water circulation device includes a secondary refrigerant container, a secondary refrigerant circulation pump and at least one set of water inlet and drain outlet;

[0010] The secondary refrigerant container has an opening at the top and is hollow inside. The water inlet and the drain outlet are arranged on the inner wall of the secondary refrigerant container. The water inlet and the drain outlet are connected to the secondary refrigerant circulation pump on the outside of the secondary refrigerant container through a pipe. The secondary refrigerant circulates through the water inlet, the secondary refrigerant container, the water outlet, and the pipe through the secondary refrigerant circulation pump.

[0011] Through the above technical solution, the secondary refrigerant achieves the user-set temperature after heat exchange with the primary refrigerant, enters the secondary refrigerant container through the secondary refrigerant circulation pump, water inlet, and drain outlet, and continuously exchanges heat with the primary refrigerant through the secondary refrigerant circulation pump to maintain the user-set temperature.

[0012] Preferably, the secondary refrigerant circulation device includes a first water inlet, a second water inlet, a first drain outlet and a second drain outlet;

[0013] The first water inlet and the second water inlet are respectively arranged at two opposite end surfaces of the secondary refrigerant container, and are arranged in diagonal directions. The first drain outlet and the second drain outlet are respectively arranged at the bottom of the secondary refrigerant container and the end surface on the same side of the secondary refrigerant container as the first water inlet.

[0014] Through the above technical solution, the temperature of the secondary refrigerant can slowly and steadily reach the maximum set temperature, the heat exchange effect is excellent, and the overall temperature of the secondary refrigerant is uniform.

[0015] Preferably, an LED light is provided on the inner wall of the secondary refrigerant container, and the LED light is provided on the inner wall of the secondary refrigerant container;

[0016] The secondary refrigerant circulation device also includes a built-in filter for sterilizing and filtering the secondary refrigerant.

[0017] Through the above technical solution, the secondary refrigerant is more suitable for users and enhances the user experience.

[0018] Preferably, the low-temperature refrigeration device includes a compressor, a condenser, a throttle valve, and an evaporator arranged in sequence, and the compressor, condenser, throttle valve, and evaporator are connected in sequence through pipelines and connected end to end to form a closed circulation loop; the refrigerant circulates in the low-temperature refrigeration device through the pipeline.

[0019] Through the above technical solution, it is convenient to quickly cool the refrigerant through the effects of temperature and pressure, absorb the heat of the primary refrigerant, and then cool it down again and absorb the heat of the primary refrigerant, and the cycle is repeated.

[0020] Preferably, the compressor is used to compress the superheated refrigerant vapor evaporated from the evaporator into high-temperature and high-pressure refrigerant gas and discharge it to the condenser. The condenser condenses the high-temperature and high-pressure refrigerant gas and releases heat to form a high-pressure refrigerant liquid. The throttle valve reduces the pressure to form a low-temperature and low-pressure subcooled refrigerant liquid. The low-temperature and low-pressure subcooled refrigerant liquid is vaporized by the evaporator to absorb the heat of the primary refrigerant and become superheated refrigerant vapor and return to the compressor.

[0021] The evaporator is a plate heat exchanger, and the condenser is provided with a condensing fan for discharging the heat carried by the high-temperature refrigerant in the condenser to the outside;

[0022] The low-temperature refrigeration device further includes a refrigeration cycle controller for controlling the low-temperature refrigeration device to adjust the temperature of the secondary refrigerant by adjusting the heat exchange effect between the refrigerant and the primary refrigerant;

[0023] The refrigeration cycle controller includes a WIFI module and a voice recognition module. The refrigeration cycle controller is connected to the mobile terminal via the WIFI module, and the voice recognition module executes and receives voice instructions.

[0024] Specifically, the voice recognition module can execute the water temperature adjustment function, automatic water inlet or return function, atmosphere light switch function and single cryotherapy timing function according to user instructions.

[0025] Through the above technical solution, it is convenient for users to control the heat exchange effect between the refrigerant and the primary refrigerant or the heat exchange effect between the primary refrigerant and the secondary refrigerant, or directly adjust the temperature of the secondary refrigerant after heat exchange so that the secondary refrigerant reaches the temperature set by the user.

[0026] Preferably, the primary refrigerant circulation device includes a primary refrigerant circulation pump and a secondary heat exchanger;

[0027] The primary refrigerant circulation pump is used to transport the primary refrigerant to the evaporator for heat exchange with the refrigerant and then to the secondary heat exchanger for heat exchange with the secondary refrigerant.

[0028] Through the above technical solution, the refrigerant absorbs the heat of the primary refrigerant, and the primary refrigerant absorbs the heat of the secondary refrigerant in the secondary heat exchanger, so that it can quickly and stably reach the temperature set by the user.

[0029] Preferably, the primary refrigerant circulation device further comprises a heater for adjusting the temperature of the secondary refrigerant entering the secondary refrigerant container;

[0030] The secondary heat exchanger abuts against the outer side of the secondary refrigerant container.

[0031] Through the above technical solution, the refrigerant absorbs the heat of the primary refrigerant, and the primary refrigerant absorbs the heat of the secondary refrigerant in the secondary heat exchanger, so that it can quickly and stably reach the temperature set by the user or rise to the temperature set by the user after being lower than the temperature set by the user.

[0032] The second purpose of the present utility model is to provide an ice bath device with a two-stage heat exchange heat pump system suitable for an ice bath. The second purpose of the present utility model is achieved through the following technical solution: An ice bath device with a two-stage heat exchange heat pump system suitable for an ice bath includes a two-stage heat exchange heat pump system suitable for an ice bath and a shell.

[0033] Preferably, the two-stage heat exchange heat pump system suitable for ice bath comprises a low-temperature refrigeration device, a primary refrigerant circulation device and a secondary refrigerant circulation device; the low-temperature refrigeration device, the primary refrigerant circulation device and the secondary refrigerant circulation pump and the built-in filter of the low-temperature refrigeration device, the primary refrigerant circulation device and the low-temperature water circulation device are located between the shell and the secondary refrigerant container and the shell;

[0034] The housing is further provided with an air inlet grille, which corresponds to the position of the condensing fan.

[0035] Through the above technical solution, the above two-stage heat exchange heat pump system suitable for ice bath is easily integrated into a whole, which is convenient for users to install and use.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] (1) The two-stage heat exchange heat pump system suitable for ice bath of the present invention is provided with a low-temperature refrigeration device, a primary refrigerant circulation device and a low-temperature water circulation device. The low-temperature refrigeration device is provided with a refrigerant, the primary refrigerant circulation device is provided with a primary refrigerant, and the low-temperature water circulation device includes a secondary refrigerant. The primary refrigerant exchanges heat with the refrigerant and the secondary refrigerant respectively, ensuring that the system can make the secondary refrigerant in the secondary refrigerant container reach the set temperature of 0 degrees (Celsius), so that the system can stably exchange heat, avoid the problems such as ice blockage in the prior art that easily occur in the system and damage to the system heat exchange components, and improve the reliability of the system operation;

[0038] (2) The two-stage heat exchange heat pump system of the utility model, which is suitable for ice baths, optimizes the problem of uneven heat exchange temperature difference that occurs during the large temperature difference heat transfer process. Through the two-stage heat exchange method, the consistency and stability of heat exchange are guaranteed, ensuring sufficient energy transfer;

[0039] (3) The two-stage heat exchange heat pump system suitable for ice baths of the present invention solves the user's requirements for the system's extreme temperature and can be applied to different working environments. By adopting a two-stage heat exchange system, the technical barrier of the existing ice bath system's lowest temperature of 3 degrees Celsius is further reduced; at the same time, the problem of integrated structural design and material selection between the heat exchange equipment and the secondary refrigerant container is solved;

[0040] (4) Wide operating range: It has stronger adaptability to changes in ambient temperature and load, and can operate stably in a wide temperature range to ensure the cooling effect. In the first-stage heat exchange process, it is not limited by the water temperature of the exchanged water, and can break through the evaporation temperature to around -20°C; in the second-stage heat exchange, the water temperature can slowly and steadily reach the limit temperature of 0°C;

[0041] (5) High reliability: Two-stage heat exchange effectively isolates the secondary refrigerant that people have been exposed to from the primary refrigerant used for heat exchange in the refrigeration system, greatly improving the stability of the system's heat exchange. At the same time, the heat exchange of the refrigeration system is no longer affected by the secondary heat exchange, which improves the reliability and service life of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the three-dimensional structure of a two-stage heat exchange heat pump system suitable for ice baths according to Example 1 of the present utility model;

[0043] Figure 2 This is a schematic diagram of the three-dimensional structure of the two-stage heat exchange heat pump system suitable for ice baths in another direction according to Example 1 of the present utility model;

[0044] Figure 3 This is a schematic diagram of a partial three-dimensional structure of a two-stage heat exchange heat pump system with a hidden secondary refrigerant container for an ice bath according to Example 1 of the present invention;

[0045] Figure 4 This is a partial three-dimensional structural diagram of another direction of the hidden secondary refrigerant container of the two-stage heat exchange heat pump system for ice baths according to Example 1 of the present invention;

[0046] Figure 5 This is a top view of an ice bath device having a two-stage heat exchange heat pump system suitable for ice bathing according to Example 2 of the present invention;

[0047] Figure numerals: 1. Secondary refrigerant container; 2. Secondary refrigerant circulation pump; 3. Built-in filter; 4. First drain outlet; 5A. First water inlet; 5B. Second water inlet; 6A. Second drain outlet; 6B. LED light; 7. Primary refrigerant circulation pump; 8. Evaporator; 9. Condenser; 10. Throttle valve; 11. Compressor; 12. Condensing fan; 13. Refrigeration cycle controller; 14. Heater; 15. Secondary heat exchanger. DETAILED DESCRIPTION

[0048] The following examples will help those skilled in the art to further understand the present invention, but they do not limit the present invention in any form. In the following description, in order to clearly show the structure and working method of the present invention, a number of directional words will be used for description, but the words "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", "down" and the like should be understood as convenient terms and should not be understood as limiting terms. The "far" and "near" in "far section", "distal end", "near section" and "near end" herein are relative to the position of the operator, that is, "near" is close to the operator and "far" is far away from the operator.

[0049] For those skilled in the art, several changes and improvements can be made without departing from the concept of the present invention, which all fall within the scope of protection of the present invention. The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, and these numerical ranges should be regarded as specifically disclosed herein. The present invention is described in detail below in conjunction with specific embodiments: Example 1

[0050] like Figure 1-2 As shown, this embodiment relates to a two-stage heat exchange heat pump system suitable for ice baths, comprising a low-temperature refrigeration unit, a primary refrigerant circulation unit, and a secondary refrigerant circulation unit. The low-temperature refrigeration unit contains a refrigerant, the primary refrigerant circulation unit contains a primary refrigerant, and the secondary refrigerant circulation unit contains a secondary refrigerant. The primary refrigerant is used to exchange heat with the refrigerant and the secondary refrigerant.

[0051] like Figure 3-4 As shown, in a specific embodiment, the low-temperature refrigeration device includes a compressor 11, a condenser 9, a throttle valve 10, and an evaporator 8 arranged in sequence. The compressor 11, the condenser 9, the throttle valve 10, and the evaporator 8 are connected in sequence through pipelines and connected end to end to form a closed circulation loop; the refrigerant circulates in the low-temperature refrigeration device through the pipeline.

[0052] Among them, the compressor 11 is used to compress the superheated vapor of the refrigerant evaporated from the evaporator 8 into high-temperature and high-pressure refrigerant gas and discharge it to the condenser 9. The condenser 9 condenses the high-temperature and high-pressure refrigerant gas and releases heat to become a high-pressure refrigerant liquid, which is then reduced in pressure by the throttle valve 10 to become a low-temperature and low-pressure supercooled refrigerant liquid. The low-temperature and low-pressure supercooled refrigerant liquid is vaporized through the evaporator 8 and absorbs the heat of the refrigerant once to become a superheated refrigerant vapor and returns to the compressor 11.

[0053] Specifically, the evaporator 8 is a plate heat exchanger, and the condenser 9 is provided with a condensing fan 12 for discharging heat carried by the high-temperature refrigerant in the condenser 9 to the outside.

[0054] In one specific embodiment, the cryogenic refrigeration device further includes a refrigeration cycle controller 13 for controlling the cryogenic refrigeration device by adjusting the heat exchange effect between the refrigerant and the primary refrigerant to adjust the temperature of the secondary refrigerant and / or the ambient temperature. The refrigeration cycle controller 13 includes a Wi-Fi module and a voice recognition module. The refrigeration cycle controller 13 is connected to a mobile terminal via the Wi-Fi module, and the voice recognition module receives voice commands. The voice recognition module can, based on user commands, adjust water temperature, automatically fill or return water, turn LED light 6B on and off, and time a single cryotherapy session.

[0055] In one embodiment, the primary refrigerant circulation device includes a primary refrigerant circulation pump 7 and a secondary heat exchanger 15. The primary refrigerant circulation pump 7 is used to transport the primary refrigerant to the evaporator 8 for heat exchange with the refrigerant, and then to the secondary heat exchanger 15 for heat exchange with the secondary refrigerant. The secondary heat exchanger 15 is in contact with the outer side of the secondary refrigerant container 1.

[0056] In another specific embodiment, the primary refrigerant circulation device further includes a heater 14 for adjusting the temperature of the secondary refrigerant entering the secondary refrigerant container 1 .

[0057] In a specific embodiment, the secondary refrigerant circulation device includes a secondary refrigerant container 1, a secondary refrigerant circulation pump 2 and at least one set of water inlet and drain outlet; specifically, the low-temperature water circulation device in this embodiment includes a first water inlet 5A, a second water inlet 5B, a first drain outlet 4 and a second drain outlet 6A.

[0058] The secondary refrigerant container 1 is hollow inside with an opening at the top. The water inlet and drain outlet are provided on the inner side wall of the secondary refrigerant container 1. The water inlet and drain outlet are connected to the secondary refrigerant circulation pump 2 on the outside of the secondary refrigerant container 1 through a pipe. The secondary refrigerant circulates through the water inlet, the secondary refrigerant container 1, the water outlet, and the pipe via the secondary refrigerant circulation pump 2. Specifically, in this embodiment, the first water inlet 5A and the second water inlet 5B are respectively provided on two opposite end faces of the secondary refrigerant container 1, and are provided in a diagonal direction. The first drain outlet 4 and the second drain outlet 6A are respectively provided on the bottom of the secondary refrigerant container 1 and on the same side of the secondary refrigerant container 1 as the first water inlet 5A.

[0059] In another specific embodiment, an LED lamp 6B is provided on the inner wall of the secondary refrigerant container 1 , and the low-temperature water circulation device further includes a built-in filter 3 for sterilizing and filtering the secondary refrigerant.

[0060] In the two-stage heat exchange heat pump system suitable for ice baths in this embodiment, the refrigerant is rapidly cooled down by the action of temperature and pressure, and absorbs the heat of the primary refrigerant, and then cooled down again and absorbs the heat of the primary refrigerant, and the cycle is repeated. Then, the secondary refrigerant exchanges heat with the primary refrigerant to achieve the temperature set by the user, and enters the secondary refrigerant container 1 through the secondary refrigerant circulation pump 2, the water inlet, and the drain outlet, and continuously exchanges heat with the primary refrigerant through the secondary refrigerant circulation pump 2 to maintain the temperature set by the user.

[0061] This system can stably reach the user's set temperature, especially in the process of large temperature difference heat transfer, ensuring the consistency and stability of heat exchange, ensuring sufficient energy transfer, and facilitating the temperature of the secondary refrigerant to slowly and steadily reach the ultimate set temperature. The heat exchange effect is excellent, and the overall temperature of the secondary refrigerant is uniform and can quickly and stably reach 0 degrees (Celsius), avoiding the problems of system ice blockage and damage to the system heat exchange components that are easy to occur in the existing technology, thereby improving the reliability of the system operation. Example 2

[0062] like Figure 5 As shown, this embodiment relates to an ice bath device with a two-stage heat exchange heat pump system suitable for an ice bath, including the two-stage heat exchange heat pump system suitable for an ice bath in Example 1 and a shell. The two-stage heat exchange heat pump system suitable for an ice bath includes a low-temperature refrigeration device, a primary refrigerant circulation device and a low-temperature water circulation device; the secondary refrigerant circulation pump 2 and the built-in filter 3 of the low-temperature refrigeration device, the primary refrigerant circulation device and the secondary refrigerant circulation device are located between the shell and the secondary refrigerant container 1 and the shell; in another specific embodiment, the shell is also provided with an air inlet grille, which corresponds to the position of the condensing fan 12 to facilitate user installation and use.

[0063] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A two-stage heat exchange heat pump system suitable for ice bath, characterized in that: It includes a low-temperature refrigeration device, a primary refrigerant circulation device and a secondary refrigerant circulation device; the secondary refrigerant circulation device includes a secondary refrigerant; The low-temperature refrigeration device comprises a compressor (11), a condenser (9), a throttle valve (10), and an evaporator (8) which are arranged in sequence. The compressor (11), condenser (9), throttle valve (10), and evaporator (8) are connected in sequence through pipelines and connected end to end to form a closed circulation loop. A refrigerant is provided in the low-temperature refrigeration device, and the refrigerant circulates in the low-temperature refrigeration device through the pipeline. The primary refrigerant circulation device comprises a primary refrigerant circulation pump (7) and a secondary heat exchanger (15); a primary refrigerant is provided in the primary refrigerant circulation device, and the primary refrigerant circulation pump (7) is used to transport the primary refrigerant to the evaporator (8) for heat exchange with the refrigerant, and then transport it to the secondary heat exchanger (15) for heat exchange with the secondary refrigerant.

2. The two-stage heat exchange heat pump system suitable for ice bath according to claim 1, characterized in that: The secondary refrigerant circulation device comprises a secondary refrigerant container (1), a secondary refrigerant circulation pump (2), and at least one set of water inlet and drain outlet; The secondary refrigerant container (1) is hollow inside with an opening at the top. The water inlet and the drain outlet are arranged on the inner wall of the secondary refrigerant container (1). The water inlet and the drain outlet are connected to the secondary refrigerant circulation pump (2) on the outside of the secondary refrigerant container (1) through a pipeline. The secondary refrigerant circulates through the water inlet, the secondary refrigerant container (1), the water outlet, and the pipeline through the secondary refrigerant circulation pump (2).

3. The two-stage heat exchange heat pump system suitable for ice bath according to claim 2, characterized in that: The secondary refrigerant circulation device comprises a first water injection port (5A), a second water injection port (5B), a first drain port (4) and a second drain port (6A); The first water inlet (5A) and the second water inlet (5B) are respectively arranged at two opposite end faces of the secondary refrigerant container (1) and are arranged in diagonal directions. The first drain outlet (4) and the second drain outlet (6A) are respectively arranged at the bottom of the secondary refrigerant container (1) and the end face of the secondary refrigerant container (1) on the same side as the first water inlet (5A).

4. The two-stage heat exchange heat pump system suitable for ice bath according to claim 3, characterized in that: An LED lamp (6B) is provided on the inner wall of the secondary refrigerant container (1), and the LED lamp (6B) is provided on the inner wall of the secondary refrigerant container (1); The secondary refrigerant circulation device further comprises a built-in filter (3) for sterilizing and filtering the secondary refrigerant.

5. The two-stage heat exchange heat pump system suitable for ice bath according to claim 1, characterized in that: The compressor (11) is used to compress the superheated refrigerant vapor evaporated from the evaporator (8) into high-temperature and high-pressure refrigerant gas and discharge it to the condenser (9); the condenser (9) condenses the high-temperature and high-pressure refrigerant gas and releases heat into high-pressure refrigerant liquid, which is then depressurized by the throttle valve (10) into low-temperature and low-pressure supercooled refrigerant liquid; the low-temperature and low-pressure supercooled refrigerant liquid is vaporized by the evaporator (8) and absorbs the heat of the primary refrigerant to become superheated refrigerant vapor and return to the compressor (11); The evaporator (8) is a plate-type heat exchanger, and the condenser (9) is provided with a condensing fan (12) for discharging heat carried by the high-temperature refrigerant in the condenser (9) to the outside; The low-temperature refrigeration device further includes a refrigeration cycle controller (13) for controlling the low-temperature refrigeration device to adjust the temperature of the secondary refrigerant by adjusting the heat exchange effect between the refrigerant and the primary refrigerant; The refrigeration cycle controller (13) comprises a WIFI module and a voice recognition module. The refrigeration cycle controller (13) is connected to a mobile terminal via the WIFI module, and the voice recognition module executes and receives voice instructions.

6. The two-stage heat exchange heat pump system suitable for ice bath according to claim 1, characterized in that: The primary refrigerant circulation device further includes a heater (14) for adjusting the temperature of the secondary refrigerant entering the secondary refrigerant container (1); The secondary heat exchanger (15) is in contact with the outer side of the secondary refrigerant container (1).

7. An ice bath device having a two-stage heat exchange heat pump system suitable for an ice bath, comprising the two-stage heat exchange heat pump system suitable for an ice bath according to any one of claims 1 to 6 and a housing.

8. The ice bath device having a two-stage heat exchange heat pump system suitable for ice bathing according to claim 7, characterized in that: The two-stage heat exchange heat pump system suitable for ice bath comprises a low-temperature refrigeration device, a primary refrigerant circulation device and a secondary refrigerant circulation device; the secondary refrigerant circulation pump (2) and the built-in filter (3) of the low-temperature refrigeration device, the primary refrigerant circulation device and the secondary refrigerant circulation device are located between the shell and the secondary refrigerant container (1) and the shell.

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