Heat cycle system for industrial sterilization unit

Abstract

The utility model provides a heat cycle system for an industrial sterilization unit, the industrial sterilization unit comprises a first sterilization machine with the return water temperature of 30-40 DEG C, a second sterilization machine with the water outlet temperature of 15-25 DEG C and at least one third sterilization machine with the water outlet temperature of 75-95 DEG C. The heat cycle system comprises a first cascade water source heat pump, a second cascade water source heat pump, a third cascade water source heat pump and a third cascade water source heat pump, the first heat source side inlet is in fluid communication with the water return end of the first sterilization machine, and the first heat source side outlet is in fluid communication with the water outlet end of the second sterilization machine; the first load side inlet and the first load side outlet are respectively in fluid communication with the water return end of each third sterilization machine and the water outlet end of each third sterilization machine; the load side water pump is arranged on a fluid path between the first cascade type water source heat pump and the at least one third sterilization machine; and the first heat source side water pump is configured on a fluid path formed by the first sterilization machine, the first cascade type water source heat pump and the second sterilization machine.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial sterilization, in particular to a heat circulation system for an industrial sterilization unit. Background Art

[0002] Industrial sterilization units need to use 75-95℃ sterilization water to spray sterilize the parts to be sterilized (such as bottle embryos, etc.), and then use lower temperature cooling water to gradually spray and cool the sterilized parts until the parts reach the required output temperature (generally required to be below 25℃). The sterilization water and cooling water after use will be collected in the corresponding water tank. The traditional process uses steam to heat the sterilization water after spraying and inject cold water into the cooling water after spraying to achieve the recycling of sterilization water and cooling water. However, this method does not utilize the heat of the cooling water after spraying, so the thermal energy utilization rate is low. Utility Model Content

[0003] In view of the related technical problem of low thermal energy utilization rate in the above-mentioned traditional process, the utility model provides a thermal circulation system for an industrial sterilizer, which can utilize the heat of cooling water after spraying.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a heat circulation system for an industrial sterilization unit, each of the sterilizers has a water outlet for spraying water to the parts to be sterilized and a water return end for receiving the water after spraying, the industrial sterilization unit includes a first sterilizer with a return water temperature of 30-40°C, a second sterilizer with a water outlet temperature of 15-25°C, and at least one third sterilizer with a water outlet temperature of 75-95°C, the heat circulation system includes: a first cascade water source heat pump, having a first heat source side inlet, a first heat source side outlet, a first load side inlet and a first The load side outlet, the first heat source side inlet fluid is connected to the return water end of the first sterilizer, the first heat source side outlet fluid is connected to the water outlet end of the second sterilizer, the first load side inlet and the first load side outlet are respectively connected to the return water end and the water outlet end of each of the third sterilizers; the load side water pump is arranged on the fluid path between the first cascade water source heat pump and the at least one third sterilizer; and the first heat source side water pump is arranged on the fluid path formed by the first sterilizer, the first cascade water source heat pump and the second sterilizer.

[0005] In the above technical solution, preferably, the industrial sterilization unit also includes a fourth sterilizer with a return water temperature of 40-50°C and a fifth sterilizer with an outlet water temperature of 25-35°C, and the thermal circulation system also includes a second cascade water source heat pump and a second heat source side water pump, the second cascade water source heat pump includes a second heat source side inlet, a second heat source side outlet, a second load side inlet and a second load side outlet, the second heat source side inlet fluid is connected to the return water end of the fourth sterilizer, the second heat source side outlet fluid is connected to the outlet water end of the fifth sterilizer, the second load side inlet and the second load side outlet are respectively connected to the return water end and the outlet water end of each of the third sterilizers; the second heat source side water pump is arranged on the fluid path formed by the fourth sterilizer, the second cascade water source heat pump and the fifth sterilizer.

[0006] In the above preferred scheme, it is further preferred that the thermal circulation system also includes a solar water heater, the solar water heater has a water inlet and a water outlet, and the thermal circulation system also includes a first water inlet path connecting the water inlet and the return water end of each of the third sterilizers, a first water outlet path connecting the water outlet and the water outlet end of each of the third sterilizers, and a first solar side water pump arranged on the first water inlet path or the first water outlet path.

[0007] In the above preferred scheme, it is further preferred that the heat circulation system also includes a second water inlet path connecting the water inlet and the first heat source side outlet, a second water outlet path connecting the water outlet and the first heat source side inlet, and a second solar side water pump arranged on the second water inlet path or the second water outlet path.

[0008] In the above preferred scheme, it is further preferred that the thermal circulation system also includes a first water inlet valve configured on the first water inlet path and with adjustable opening, a first water outlet valve configured on the first water outlet path and with adjustable opening, a second water inlet valve configured on the second water inlet path and with adjustable opening, and a second water outlet valve configured on the second water outlet path and with adjustable opening, the first water inlet valve and the first water outlet valve are configured to open and close synchronously, and the second water inlet valve and the second water outlet valve are configured to open and close synchronously.

[0009] In the above-mentioned preferred scheme, it is further preferred that the heat circulation system also includes a third water inlet path connecting the water inlet and the second heat source side outlet, a third water outlet path connecting the water outlet and the second heat source side inlet, and a third solar side water pump arranged on the third water inlet path or the third water outlet path.

[0010] In the above preferred scheme, further preferably, the thermal circulation system also includes a third water inlet valve configured on the third water inlet path and having an adjustable opening, and a third water outlet valve configured on the third water outlet path and having an adjustable opening, and the third water inlet valve and the third water outlet valve are constructed to open and close synchronously.

[0011] In the above preferred scheme, further preferably, the thermal circulation system also includes a first heat source side check valve adjacent to the downstream of the second heat source side water pump.

[0012] In the above technical solution, preferably, the thermal cycle system further includes a load-side check valve adjacent to the downstream of the load-side water pump.

[0013] In the above technical solution, preferably, the heat circulation system further includes a second heat source side check valve adjacent to the downstream of the first heat source side water pump.

[0014] Compared with the traditional process flow of industrial sterilization units, the heat circulation system provided by the technical solution of the utility model can effectively recover the heat of the cooling water after spraying, and transfer its heat to the sterilization water, thereby achieving the effect of improving the efficiency of thermal energy utilization. The cooling water after spraying can also be used in a sterilizer with a lower water outlet temperature. In addition, the technical solution adopts a cascade water source heat pump for heat transfer. The cascade water source heat pump has many advantages such as relatively small pressure ratio of each level circuit, high volumetric efficiency and refrigeration coefficient of the compressor, and low exhaust temperature of the compressor. It is especially suitable for industrial sterilization units with low heat source quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The schematic diagram of the cascade water source heat pump provided by the utility model;

[0016] Figure 2 A schematic diagram of an industrial sterilization unit and a thermal circulation system provided by the utility model;

[0017] Figure 3 for Figure 2 System diagram of the thermal cycle system shown.

[0018] Note in the figure:

[0019] 10. Heat source end; 20. Heat load end;

[0020] 1. First water source heat pump; 11. Load side water pump; 12. Load side check valve;

[0021] 2. Second water source heat pump;

[0022] 31. A water pump on the first heat source side; 32. A check valve on the first heat source side;

[0023] 41. Water pump on the second heat source side; 42. Check valve on the second heat source side;

[0024] 5. Solar water heater;

[0025] 51. First water inlet path; 511. First water inlet valve; 52. First water outlet path; 521. First water outlet valve; 53. First solar-side water pump;

[0026] 54, second water inlet path; 541, second water inlet valve; 55, second water outlet path; 551, second water outlet valve; 56, second solar side water pump;

[0027] 57. The third water inlet path; 571. The third water inlet valve; 58. The third water outlet path; 581. The third water outlet valve; 59. The third solar-side water pump;

[0028] 101, low temperature side evaporator; 102, low temperature side compressor; 103, low temperature side condenser; 104, low temperature side expansion valve;

[0029] 201. High temperature side compressor; 202. High temperature side condenser; 203. High temperature side expansion valve. DETAILED DESCRIPTION

[0030] To describe the technical content, structural features, achieved purpose and effect of the utility model in detail, the technical scheme in the embodiment of the present application will be described below in conjunction with the accompanying drawings in the embodiment of the present application. Obviously, the described embodiment is only a part of the embodiment of the present application, rather than all of the embodiments. In the following description, for the purpose of explanation, many specific details are set forth to provide a detailed description of various exemplary embodiments or implementation modes of the utility model. However, various exemplary embodiments may also be implemented without these specific details or in the case of one or more equivalent arrangements. In addition, various exemplary embodiments may be different, but not necessarily exclusive. For example, without departing from the concept of the utility model, the specific shape, structure and characteristics of the exemplary embodiment may be used or implemented in another exemplary embodiment.

[0031] In the present application, the term "outlet water temperature" means the temperature of water at the outlet water end of the corresponding sterilizer; the term "return water temperature" means the temperature of water at the return water end of the corresponding sterilizer.

[0032] To facilitate the description of the technical solution provided by the present application, the cascade water source heat pump is first described below.

[0033] Figure 1 The basic structure of a cascade water source heat pump is shown, which includes a low-temperature side circuit that can absorb heat from a heat source end 10 and a high-temperature side circuit that transfers heat to a heat load end 20 .

[0034] The low-temperature side circuit includes a low-temperature side evaporator 101, a low-temperature side compressor 102, a low-temperature side condenser 103 and a low-temperature side expansion valve 104. The low-temperature side evaporator 101, the low-temperature side compressor 102, the low-temperature side condenser 103 and the low-temperature side expansion valve 104 are fluidically connected in sequence and form a circulation circuit for the flow of low-temperature side refrigerant.

[0035] Among them, the low-temperature side evaporator 101 is used for heat exchange between the low-temperature side refrigerant and the hot water at the heat source end 10, so that the above-mentioned hot water heats the low-temperature and low-pressure low-temperature side refrigerant to a high-temperature and low-pressure (generally gaseous) state; the low-temperature side compressor 102 is used to compress the high-temperature and low-pressure low-temperature side refrigerant fluid into a high-temperature and high-pressure (generally gaseous) state; the low-temperature side condenser 103 is used for the low-temperature side refrigerant to release heat to the outside, and converts the high-temperature and high-pressure low-temperature side refrigerant into a low-temperature and high-pressure (generally liquid) state; the low-temperature side expansion valve 104 is used to throttle the low-temperature and high-pressure low-temperature side refrigerant into a low-temperature and low-pressure (generally gaseous) state.

[0036] The high-temperature side circuit includes a high-temperature side compressor 201, a high-temperature side condenser 202 and a high-temperature side expansion valve 203. The low-temperature side condenser 103, the high-temperature side compressor 201, the high-temperature side condenser 202 and the high-temperature side expansion valve 203 are fluidically connected in sequence and form a circulation circuit for the high-temperature side refrigerant to flow.

[0037] Among them, the low-temperature side condenser 103 is used for heat exchange between the low-temperature refrigerant and the high-temperature side refrigerant, so that the low-temperature refrigerant heats the low-temperature and low-pressure high-temperature side refrigerant to a high-temperature and low-pressure (generally gaseous) state; the high-temperature side compressor 201 is used to compress the high-temperature and low-pressure high-temperature side refrigerant fluid into a high-temperature and high-pressure (generally gaseous) state; the high-temperature side condenser 202 is used for heat exchange between the high-temperature side refrigerant and the hot water at the heat load end 20, so as to heat the above-mentioned hot water to the required temperature and convert the high-temperature and high-pressure high-temperature side refrigerant into a low-temperature and high-pressure (generally liquid) state; the high-temperature side expansion valve 203 is used to throttle the low-temperature and high-pressure high-temperature side refrigerant into a low-temperature and low-pressure (generally liquid) state.

[0038] Compared with the traditional single-stage heating system, the cascade water source heat pump has many advantages such as smaller circuit pressure at each stage, higher compressor volumetric efficiency and refrigeration coefficient, and lower compressor exhaust temperature. It is more suitable for heating systems with lower heat source quality.

[0039] Figure 2An industrial sterilization unit is shown, which includes multiple sterilizers arranged in sequence along the moving direction of the parts to be sterilized, each of which has a water outlet (generally set as a water nozzle) for spraying the parts to be sterilized and a water return end (generally set as a water tank) for recovering the water after spraying. The above multiple sterilizers sequentially constitute a heating zone R that can gradually increase the temperature of the parts to be sterilized, a sterilization zone P that can use sterilization water to sterilize the parts to be sterilized, and a cooling zone C that uses cooling water to gradually reduce the temperature of the parts to be sterilized.

[0040] The temperature rise zone R provided in this example is equipped with sterilizers R1-R4 with gradually increasing outlet water temperatures, wherein the outlet water temperature of sterilizer R1 is 15-25°C, and the outlet water temperature of sterilizer R2 is 25-35°C. By gradually increasing the outlet water temperature of sterilizers R1-R4, the temperature of the parts to be sterilized can be quickly increased while ensuring that the temperature difference between the parts to be sterilized and the heating water is small (e.g., within 10°C), so as to shorten the heating time of the parts to be sterilized and prevent the parts to be sterilized from being broken due to excessive temperature difference.

[0041] The sterilization area P is equipped with sterilizers P1-P4 with water outlet temperature of 75-95° C. and return water temperature of 60-70° C. The sterilizers P1-P4 spray high-temperature sterilization water on the parts to be sterilized to achieve the sterilization effect.

[0042] The cooling zone C is equipped with sterilizers C1-C4 with gradually decreasing outlet water temperatures, of which the return water temperature of sterilizer C3 is 40-50°C and the return water temperature of sterilizer C4 is 30-40°C. By gradually reducing the outlet water temperature of sterilizers C1-C4, the temperature of the components can be quickly reduced while ensuring that the temperature difference between the components and the cooling water is small (e.g., within 10°C), thereby shortening the cooling time of the components and preventing the components from breaking due to excessive temperature differences.

[0043] Combination Figure 2 and Figure 3 The heat cycle system includes a first cascade water source heat pump 1 and a second cascade water source heat pump 2.

[0044] The first cascade water source heat pump 1 has a first heat source side inlet (not shown in the figure), a first heat source side outlet (not shown in the figure), a first load side inlet (not shown in the figure) and a first load side outlet (not shown in the figure). The first heat source side inlet is fluidly connected to the return water end of the sterilizer C4, the first heat source side outlet is fluidly connected to the water outlet end of the sterilizer R1, the first load side inlet is fluidly connected to the return water end of the sterilizers P1-P4, and the first load side outlet is fluidly connected to the water outlet end of the sterilizers P1-P4.

[0045] The fluid path formed by the first load-side inlet and the sterilizers P1-P4 is also provided with a load-side water pump 11 and a load-side check valve 12 adjacent to the downstream of the load-side water pump 11. The load-side water pump 11 is used to provide flow power for the fluid in the fluid path, and the load-side check valve 12 is used to prevent the downstream fluid with higher pressure from backwashing into the water pump with lower pressure when the load-side water pump 11 stops.

[0046] The fluid path formed by the first heat source side inlet and the sterilizer C4 is also provided with a first heat source side water pump 31 and a first heat source side check valve 32 adjacent to the downstream of the first heat source side water pump 31. The first heat source side water pump 31 is used to provide the flow power of the fluid in the fluid path, and the first heat source side check valve 32 is used to prevent the downstream fluid with higher pressure from backwashing into the water pump with lower pressure when the first heat source side water pump 31 is shut down.

[0047] Through the first cascade water source heat pump 1, part of the heat of the cooling water after spraying in the sterilizer C4 is transferred to the sterilization water of the sterilizers P1-P4. After cooling, the cooling water of the sterilizer C4 enters the sterilizer R1 with a lower water outlet temperature, thereby realizing heat recovery and water recycling, and improving the thermal energy utilization rate of the industrial sterilization unit.

[0048] Similarly, the second cascade water source heat pump 2 has a second heat source side inlet (not shown in the figure), a second heat source side outlet (not shown in the figure), a second load side inlet (not shown in the figure) and a second load side outlet (not shown in the figure). Among them, the second heat source side inlet fluid is connected to the return water end of the sterilizer C3, the second heat source side outlet fluid is connected to the water outlet end of the sterilizer R2, the second load side inlet is also connected to the return water end of the sterilizer P1-P4, and the second load side outlet is also connected to the water outlet end of the sterilizer P1-P4. Among them, the second cascade water source heat pump 2 is located downstream of the load side water pump 11 and is connected to the load side water pump 11 fluid.

[0049] The fluid path formed by the second heat source side inlet and the sterilizer C3 is also provided with a second heat source side water pump 41 and a second heat source side check valve 42 adjacent to the downstream of the second heat source side water pump 41. The second heat source side water pump 41 is used to provide flow power for the fluid in the fluid path, and the second heat source side check valve 42 is used to prevent the downstream fluid with higher pressure from backwashing into the water pump with lower pressure when the second heat source side water pump 41 is shut down.

[0050] Through the second cascade water source heat pump 2, part of the heat of the cooling water after spraying by the sterilizer C3 is transferred to the sterilization water of the sterilizers P1-P4. After cooling, the cooling water of the sterilizer C3 enters the sterilizer R2 with a lower water outlet temperature, thereby realizing heat recovery and water recycling, and improving the thermal energy utilization rate of the industrial sterilization unit.

[0051] Furthermore, the heat circulation system provided in this embodiment also includes a solar water heater 5, and the solar water heater 5 has a water inlet (not shown in the figure) and a water outlet (not shown in the figure).

[0052] The heat circulation system also includes a first water inlet path 51 connecting the water inlet of the solar water heater and the outlet of the first heat source side, and a first water outlet path 52 connecting the water outlet of the solar water heater and the inlet of the first heat source side. The first water inlet path 51 is provided with a first water inlet valve 511 with adjustable opening, the first water outlet path is provided with a first water outlet valve 521 with adjustable opening, and the first water inlet path 51 or the first water outlet path 52 is also provided with a first solar side water pump 53. In order to ensure that the water volume at the water outlet of the sterilizer R1 is sufficient (i.e., to avoid the water entering the solar water heater from the outlet of the first heat source side being diverted to sterilizers other than the sterilizer R1 after being heated, resulting in too little water inlet to the sterilizer R1), the first water inlet valve 511 and the first water outlet valve 521 are configured to open and close synchronously.

[0053] Similarly, the heat circulation system also includes a second water inlet path 54 connecting the water inlet of the solar water heater and the outlet of the second heat source side, and a second water outlet path 55 connecting the water outlet of the solar water heater and the water outlet of the sterilizer R2. A second water inlet valve 541 with adjustable opening is configured on the second water inlet path 54, a second water outlet valve 551 with adjustable opening is configured on the second water outlet path 55, and a second solar side water pump 56 is also configured on the second water inlet path 54 or the second water outlet path 55. In order to ensure that the water volume at the water outlet of the sterilizer R2 is sufficient, the second water inlet valve 541 and the second water outlet valve 551 are configured to open and close synchronously.

[0054] Similarly, the thermal circulation system also includes a third water inlet path 57 connecting the water inlet of the solar water heater and the return water end of the sterilizer P1-P4, and a third water outlet path 58 connecting the water outlet of the solar water heater and the water outlet end of the sterilizer bottles P1-P4. The third water inlet path 57 is equipped with a third water inlet valve 571 with adjustable opening, and the third water outlet path 58 is equipped with a third water outlet valve 581 with adjustable opening. The third water inlet path 57 or the third water outlet path 58 is also equipped with a third solar side water pump 59. In order to ensure that the water volume at the water outlet end of the sterilizer P1-P4 is sufficient, the third water inlet valve 571 and the third water outlet valve 581 are configured to open and close synchronously.

[0055] Through the design of the above-mentioned water inlet paths, water inlet valves, water outlet paths and water outlet valves, the heat circulation system can also make full use of solar energy to improve the thermal energy utilization rate of the system. For example, in the morning and evening when the solar energy is weak, the first water inlet valve 511 and the first water outlet valve 521 are opened and the other water inlet valves and water outlet valves are closed, and the return water of at least part of the sterilizer C4 (i.e., the water for heating entering the sterilizer R1) is heated by solar energy; from 9 to 10 in the morning and from 3 to 4 in the afternoon when the solar energy is strong, the second water inlet valve 541 and the second water outlet valve 551 are opened and the other water inlet valves and water outlet valves are closed, and the return water of at least part of the sterilizer C3 (i.e., the water for heating entering the sterilizer R2) is heated by solar energy; from 10 in the morning to 3 in the afternoon when the solar energy is abundant, the third water inlet valve 571 and the third water outlet valve 581 are opened and the other water inlet valves and water outlet valves are closed, and the return water of at least part of the sterilizers P1-P4 (i.e., the sterilization water entering the sterilizers P1-P4) is heated by solar energy.

[0056] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and the scope of protection required by the utility model is defined by the attached claims, description and their equivalents.

Claims

1. A thermal circulation system for an industrial sterilization unit, wherein each of the sterilizers has a water outlet for spraying water to the parts to be sterilized and a water return end for receiving the water after spraying, and the industrial sterilization unit comprises a first sterilizer with a return water temperature of 30-40°C, a second sterilizer with a water outlet temperature of 15-25°C, and at least one third sterilizer with a water outlet temperature of 75-95°C, characterized in that: The thermal cycle system comprises: The first cascade water source heat pump has a first heat source side inlet, a first heat source side outlet, a first load side inlet and a first load side outlet, wherein the first heat source side inlet is fluidly connected to the return water end of the first sterilizer, the first heat source side outlet is fluidly connected to the water outlet end of the second sterilizer, and the first load side inlet and the first load side outlet are fluidly connected to the return water end and the water outlet end of each of the third sterilizers respectively; a load-side water pump, arranged on a fluid path between the first cascade water source heat pump and the at least one third sterilizer; and The first heat source side water pump is arranged on a fluid path formed by the first sterilizer, the first cascade water source heat pump and the second sterilizer.

2. The thermal cycle system according to claim 1, characterized in that: The industrial sterilization unit also includes a fourth sterilizer with a return water temperature of 40-50°C and a fifth sterilizer with an outlet water temperature of 25-35°C; the thermal circulation system also includes a second cascade water source heat pump and a second heat source side water pump, the second cascade water source heat pump includes a second heat source side inlet, a second heat source side outlet, a second load side inlet and a second load side outlet, the second heat source side inlet fluid is connected to the return water end of the fourth sterilizer, the second heat source side outlet fluid is connected to the outlet water end of the fifth sterilizer, the second load side inlet and the second load side outlet are respectively connected to the return water end and the outlet water end of each of the third sterilizers; the second heat source side water pump is arranged on the fluid path formed by the fourth sterilizer, the second cascade water source heat pump and the fifth sterilizer.

3. The thermal cycle system according to claim 2, characterized in that: It also includes a solar water heater, which has a water inlet and a water outlet. The thermal circulation system also includes a first water inlet path connecting the water inlet and the return water end of each of the third sterilizers, a first water outlet path connecting the water outlet and the water outlet end of each of the third sterilizers, and a first solar side water pump arranged on the first water inlet path or the first water outlet path.

4. The thermal cycle system according to claim 3, characterized in that: It also includes a second water inlet path connecting the water inlet and the first heat source side outlet, a second water outlet path connecting the water outlet and the first heat source side inlet, and a second solar side water pump arranged on the second water inlet path or the second water outlet path.

5. The thermal cycle system according to claim 4, characterized in that: It also includes a first water inlet valve configured on the first water inlet path and with adjustable opening, a first water outlet valve configured on the first water outlet path and with adjustable opening, a second water inlet valve configured on the second water inlet path and with adjustable opening, and a second water outlet valve configured on the second water outlet path and with adjustable opening, the first water inlet valve and the first water outlet valve are configured to open and close synchronously, and the second water inlet valve and the second water outlet valve are configured to open and close synchronously.

6. The thermal cycle system according to claim 4 or 5, characterized in that: It also includes a third water inlet path connecting the water inlet and the second heat source side outlet, a third water outlet path connecting the water outlet and the second heat source side inlet, and a third solar side water pump arranged on the third water inlet path or the third water outlet path.

7. The thermal cycle system according to claim 6, characterized in that: It also includes a third water inlet valve which is arranged on the third water inlet path and has an adjustable opening, and a third water outlet valve which is arranged on the third water outlet path and has an adjustable opening. The third water inlet valve and the third water outlet valve are constructed to open and close synchronously.

8. The thermal cycle system according to claim 2, characterized in that: It also includes a first heat source side check valve adjacent to the downstream of the second heat source side water pump.

9. The thermal cycle system according to claim 1, characterized in that: Also included is a load-side check valve adjacent to the downstream of the load-side water pump.

10. The thermal cycle system according to claim 1, characterized in that: It also includes a second heat source side check valve adjacent to the downstream of the first heat source side water pump.

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