A true ice rink heat and humidity regulation system and a control method thereof

Abstract

The present application relates to a kind of real ice field hot and wet regulation system and its control method, the system includes refrigeration dehumidification unit and control unit, refrigeration dehumidification unit includes built-in refrigeration module and cold and hot control module, built-in refrigeration module includes surface cooler, evaporator, rotary dehumidifier, air supply fan, electric heater, two surface heat exchanger, condenser and return air fan, cold and hot control module includes water-cooled evaporator, air-cooled evaporator, water-cooled condenser and air-cooled condenser;Refrigeration dehumidification unit is provided with fresh air channel and regeneration air channel, fresh air channel is used to handle fresh air and send into real ice field, regeneration air channel is used to handle outdoor air;Air-cooled evaporator is connected with water-cooled evaporator, provides cold for fresh air channel, air-cooled condenser is connected with water-cooled condenser, to provide heat.The system according to the different situation of air parameter accurately controls corresponding unit work in refrigeration dehumidification unit.The system and its control method are beneficial to reduce energy consumption, improve energy utilization efficiency.

Description

Technical Field

[0001] This invention relates to the field of heat and humidity control technology, specifically to a heat and humidity control system and control method for a real ice rink. Background Technology

[0002] As winter sports gain popularity, the construction of indoor ice rinks has become a top priority. Currently, the refrigeration systems of indoor artificial ice rinks are primarily designed for worst-case scenarios, involving turning on all units within the refrigeration and dehumidification units to process outdoor air. Since indoor and outdoor air cannot always be in the most unfavorable condition, this method is extremely energy-intensive and cannot achieve high-quality construction and green, energy-saving, and sustainable operation and maintenance management of indoor ice rinks. Chinese Patent Application No. CN201910882686.4 discloses a heating and cooling circulation system for indoor ice and snow venue flooring, comprising: a compressor, a first evaporator, a first condenser, a subcooler, a refrigeration unit, and a heating unit; the liquid inlet of the first evaporator is connected to the liquid outlet of the subcooler via an evaporator supply pipe, the exhaust port of the first evaporator is connected to the suction port of the compressor via an intake pipe, the refrigerant outlet of the first evaporator is connected to the refrigeration unit via a refrigerant outlet pipe, and the refrigerant return port of the first evaporator is connected to the refrigeration unit via a refrigerant return pipe; the air inlet of the first condenser is connected to the exhaust port of the compressor via an exhaust pipe, the liquid outlet of the first condenser is connected to the liquid inlet of the subcooler via a condenser drain pipe, the refrigerant outlet of the first condenser is connected to the heating unit via a refrigerant outlet pipe, and the refrigerant return port of the first condenser is connected to the heating unit via a refrigerant return pipe; the exhaust port of the subcooler is connected to the suction port of the compressor. Although the system utilizes the energy discharged from the cooling and heating units, it still adopts an "all-on" control mode, which cannot achieve thermal and humidity regulation by only turning on the corresponding type and power of equipment under different temperature and humidity conditions. Therefore, the problem of excessive energy consumption still exists. Summary of the Invention

[0003] The purpose of this invention is to provide a heat and humidity control system and control method for a real ice rink, which is beneficial to reducing energy consumption and improving energy utilization efficiency.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: a heat and humidity control system for a real ice rink, comprising a refrigeration and dehumidification unit and a control unit. The refrigeration and dehumidification unit includes a built-in refrigeration module and a heating and cooling control module. The built-in refrigeration module includes a surface cooler, an evaporator, a rotary dehumidifier, a supply fan, an electric heater, a first surface heat exchanger, a second surface heat exchanger, a condenser, and a return air fan. The heating and cooling control module includes a water-cooled evaporator, an air-cooled evaporator, a water-cooled condenser, and an air-cooled condenser. The refrigeration and dehumidification unit is provided with a fresh air duct and a regenerated air duct. The fresh air duct is used to process the mixed air of outdoor air and the air inside the real ice rink, i.e., fresh air is then supplied to the real ice rink. The regenerated air duct... The fresh air duct is used to process regenerated air to ensure smooth operation of the units within it. The surface cooler, evaporator, supply fan, first surface heat exchanger, and electric heater are located on the fresh air duct. The second surface heat exchanger, condenser, and return air fan are located on the regenerated air duct. The rotary dehumidifier is located between the fresh air duct and the regenerated air duct. The air-cooled evaporator and water-cooled evaporator are connected in parallel, with the water-cooled evaporator connected to the surface cooler to provide cooling for the fresh air duct. The air-cooled condenser and water-cooled condenser are connected in parallel, with the water-cooled condenser connected to the first and second surface heat exchangers to provide heat for the fresh air duct. The control unit is used to control the operation of each device in the refrigeration and dehumidification unit.

[0005] Furthermore, the refrigerant outlet of the air-cooled evaporator is connected to the refrigerant outlet of the water-cooled evaporator. After passing through the connecting pipeline and the first compressor, it is simultaneously connected to the refrigerant inlet of the air-cooled condenser and the refrigerant inlet of the water-cooled condenser. The refrigerant outlet of the air-cooled condenser is connected to the fourth valve, and the refrigerant outlet of the water-cooled condenser is connected to the fifth valve. After the fourth and fifth valves are connected, they pass through the connecting pipeline and the first throttling device, and then split into two paths. One path is connected to the refrigerant inlet of the air-cooled evaporator through the third valve, and the other path is connected to the refrigerant inlet of the water-cooled evaporator through the second valve.

[0006] Furthermore, a second compressor and a second throttling device are respectively installed on the two connecting pipes between the evaporator on the fresh air duct and the condenser on the regenerated air duct to form a circulation system.

[0007] Furthermore, a third compressor and a first valve are provided on the connecting pipe between the water-cooled evaporator and the surface cooler; a fourth compressor and a sixth, eighth, and ninth valve for controlling the switching of the main pipeline and branch pipelines are provided on the connecting pipe between the water-cooled condenser and the first and second surface heat exchangers.

[0008] Furthermore, the fresh air duct is sequentially equipped with a surface cooler, an evaporator, a rotary dehumidifier, a supply fan, a first surface heat exchanger, and an electric heater along the airflow direction. The outlet of the fresh air duct connects to the interior of the ice rink. The return air drawn from the interior of the ice rink is connected to the fresh air duct in front of the surface cooler through the return duct, and mixes with the outdoor air to form mixed air. The regenerated air duct is sequentially equipped with a second surface heat exchanger, a condenser, a rotary dehumidifier, and a return air fan along the airflow direction.

[0009] Furthermore, the system also includes a solar heating system, which is connected in parallel with the water-cooled condenser to provide heat to the fresh air duct.

[0010] The present invention also provides a control method for the above-mentioned real ice rink heat and humidity control system. First, the outdoor air is divided into six cases, corresponding to six regions ①, ②, ③, ④, ⑤, and ⑥ on the enthalpy-humidity chart, which are: non-fogging medium temperature zone, non-fogging high temperature and low humidity zone, non-fogging low temperature zone, non-fogging high temperature and medium humidity zone, fogging medium humidity zone, and fogging high humidity zone.

[0011] Then, based on the location of the fresh air parameters in the area, the control system operates:

[0012] Case 1: When the air parameters of the fresh air are in zone ①, only the first surface heat exchanger in the fresh air duct and the air-cooled evaporator and water-cooled condenser in the heating and cooling control module are turned on to heat the air to the design temperature W in the real ice rink, and then this process ends.

[0013] Case 2: When the air parameters of the fresh air are in zone ②, only the evaporator in the fresh air duct and the condenser in the regenerated air duct are turned on. If the cooling capacity is sufficient to reduce the air temperature to W, the process ends. Otherwise, the cooling capacity is increased, that is, the surface cooler in the fresh air duct and the air-cooled condenser and water-cooled evaporator in the cooling and heating control module are turned on to exchange heat to W, and the process ends.

[0014] Case 3: When the air parameters of the fresh air are in zone ③, the first surface heat exchanger in the fresh air duct is turned on first. At this time, only the air-cooled evaporator and water-cooled condenser are turned on in the heating and cooling control module. If the heat is sufficient to raise the air temperature to W, the process ends. Otherwise, the heat is increased, that is, the electric heater in the fresh air duct is turned on.

[0015] Scenario 4: When the air parameters of the fresh air are in zone ④, firstly, the surface cooler in the fresh air duct and the air-cooled condenser and water-cooled evaporator in the heating and cooling control module are turned on to exchange heat until W is reached, then this process ends; otherwise, other equipment is turned on: if it is still higher than W, the evaporator in the fresh air duct and the condenser in the regenerated air duct are turned on; if it is still lower than W, the first surface heat exchanger in the fresh air duct is turned on. At this time, only the air-cooled evaporator and water-cooled condenser are turned on in the heating and cooling control module.

[0016] Situation 5: When the fresh air parameters are in zone ⑤, first turn on the surface cooler in the fresh air duct and the air-cooled condenser and water-cooled evaporator in the cooling and heating control module to exchange heat and allow the air to reach the non-fogging zone. If it cannot reach the non-fogging zone, then turn on the evaporator in the fresh air duct and the condenser in the regenerated air duct. If it reaches the non-fogging zone, it may be in situation 1, situation 2, or situation 4 above. Then perform the corresponding operation according to the above situation.

[0017] Situation 6: When the fresh air parameters are in zone 6, first turn on the surface cooler and evaporator in the fresh air duct, the condenser in the regenerated air duct, and the air-cooled condenser and water-cooled evaporator in the cooling and heating control module to allow the air to reach the non-fogging zone. If it cannot reach the non-fogging zone, then turn on the rotary dehumidifier. If it reaches the non-fogging zone, it may be in situation 1, situation 2, or situation 4 above. Then perform the corresponding operations according to the above situations.

[0018] Furthermore, the fresh air is divided into six cases, and corresponding six regions ①, ②, ③, ④, ⑤, and ⑥ are plotted on the enthalpy-humidity chart. The specific method is as follows: The mixing zone P between the fresh air and the air inside the ice rink is measured. Then, the most unfavorable point in this zone, i.e., the point with the highest humidity, is identified. A tangent line Q to the relative humidity line φ=100% is drawn from this point, thus dividing the fresh air into two parts: the theoretical non-fogging zone and the theoretical fogging zone. Based on the design temperature W and the surface temperature K of the ice rink's frame structure, temperature lines W and K are plotted on the enthalpy-humidity chart. The humidity line NM is plotted at the intersection point M of temperature line K and the relative humidity line φ=100%. Using the above zoning method, the non-fogging zone is divided into four areas:

[0019] ① Zone: The area enclosed by the middle segment of temperature line W, temperature line K, and tangent line Q;

[0020] ② Zone: The area enclosed by the temperature line W and the humidity line NM;

[0021] ③ Zone: The area enclosed by the temperature line K and the lower segment of the tangent line Q;

[0022] ④ Zone: The area enclosed by the temperature line W, the humidity line NM, and the upper segment of the tangent line Q;

[0023] Find the most economical dehumidification point, draw a humidity line, and divide the fogging area into two regions, namely zone ⑤ and zone ⑥.

[0024] Furthermore, the most economical dehumidification point is the maximum dehumidification point designed to use only the surface cooler and evaporator for dehumidification without needing to turn on the rotary dehumidifier.

[0025] Compared with existing technologies, this invention has the following advantages: It provides a real ice rink heat and humidity control system and its control method. This system adds an additional heating and cooling regulation circulation system to the built-in refrigeration system, allowing for the control of heat and humidity in the real ice rink by only activating the appropriate type and power of equipment when the outdoor air is at different temperature and humidity levels. This not only provides flexible control but also reduces system energy consumption. This system abandons the original "all-on" control mode, utilizing the characteristics of outdoor air and indoor heat and humidity environments to divide outdoor air parameters into six categories. The refrigeration and dehumidification units are activated and deactivated according to these six different categories. This not only achieves good air conditioning inside the real ice rink, ensuring no fogging or condensation, but also significantly saves energy, reduces unnecessary energy consumption, and improves the energy efficiency of the real ice rink. Attached Figure Description

[0026] Figure 1 This is a schematic diagram illustrating the implementation principle of the real ice rink heat and humidity control system according to an embodiment of the present invention.

[0027] Figure 2 This is a vortex-humidity diagram of a zone within a real ice rink, as described in this embodiment of the invention.

[0028] Figure 3 This is a control flowchart of the real ice rink heat and humidity control system according to an embodiment of the present invention.

[0029] In the diagram: SC - Surface cooler; RD - Rotary dehumidifier; E1 - Water-cooled evaporator; E2 - Air-cooled evaporator; E3 - Evaporator; C1 - Water-cooled condenser; C2 - Air-cooled condenser; C3 - Condenser; SE1 - First surface heat exchanger; SE2 - Second surface heat exchanger; F1 - Supply air fan; F2 - Return air fan; D - Electric heater; CP1 - First compressor; CP2 - Second compressor; CP3 - Third compressor; CP4 - Fourth compressor; T1 - First throttling device; T2 - Second throttling device; S1 - First valve; S2 - Second valve; S3 - Third valve; S4 - Fourth valve; S5 - Fifth valve; S6 - Sixth valve; S7 - Seventh valve; S8 - Eighth valve; S9 - Ninth valve; SS - Solar heating system. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] like Figure 1 As shown, this embodiment provides a real ice rink heat and humidity control system, including a refrigeration and dehumidification unit and a control unit. The refrigeration and dehumidification unit includes a built-in refrigeration module and a heating and cooling control module. The built-in refrigeration module includes a surface cooler SC, an evaporator E3, a rotary dehumidifier RD, a supply fan F1, an electric heater D, a first surface heat exchanger SE1, a second surface heat exchanger SE2, a condenser C3, and a return air fan F2. The heating and cooling control module includes a water-cooled evaporator E1, an air-cooled evaporator E2, a water-cooled condenser C1, and an air-cooled condenser C2. The refrigeration and dehumidification unit is provided with a fresh air duct and a regenerated air duct. The fresh air duct is used to process the mixed air of outdoor air and the air inside the real ice rink, that is, fresh air is then sent into the real ice rink. The regenerated air duct is used to process regenerated air to... To ensure smooth operation of the units within the fresh air duct, the surface cooler SC, evaporator E3, supply fan F1, first surface heat exchanger SE1, and electric heater D are installed on the fresh air duct. The second surface heat exchanger SE2, condenser C3, and return air fan F2 are installed on the regeneration air duct. The rotary dehumidifier RD is installed between the fresh air duct and the regeneration air duct. The air-cooled evaporator E2 and the water-cooled evaporator E1 are connected in parallel. The water-cooled evaporator E1 is connected to the surface cooler SC to provide cooling for the fresh air duct. The air-cooled condenser C2 and the water-cooled condenser C1 are connected in parallel. The water-cooled condenser C1 is connected to the first surface heat exchanger SE1 and the second surface heat exchanger SE2 to provide heat for the fresh air duct. The control unit is used to control the operation of each device in the refrigeration and dehumidification unit.

[0034] The refrigerant outlet of the air-cooled evaporator E2 is connected to the refrigerant outlet of the water-cooled evaporator E1. After passing through connecting pipes and the first compressor CP1, it is simultaneously connected to the refrigerant inlets of both the air-cooled condenser C2 and the water-cooled condenser C1. The refrigerant outlet of the air-cooled condenser C2 is connected to the fourth valve S4, and the refrigerant outlet of the water-cooled condenser C1 is connected to the fifth valve S5. After the fourth valve S4 and the fifth valve S5 are connected, they pass through connecting pipes and the first throttling device T1, and then split into two paths: one path connects to the refrigerant inlet of the air-cooled evaporator E2 via the third valve S3, and the other path connects to the refrigerant inlet of the water-cooled evaporator E1 via the second valve S2. The two connecting pipes between the evaporator E3 in the fresh air duct and the condenser C3 in the regeneration air duct are respectively equipped with the second compressor CP2 and the second throttling device T2 to form a circulation system.

[0035] The water-cooled evaporator E1 and the surface cooler SC are connected by a third compressor CP3 and a first valve S1; the water-cooled condenser C1 and the first surface heat exchanger SE1 and the second surface heat exchanger SE2 are connected by a fourth compressor CP4 and a sixth valve S6, an eighth valve S8 and a ninth valve S9 for controlling the switching of the main pipeline and branch pipelines.

[0036] In this embodiment, a surface cooler, an evaporator, a rotary dehumidifier, a supply fan, a first surface heat exchanger, and an electric heater are sequentially arranged along the airflow direction in the fresh air duct. The outlet of the fresh air duct is connected to the interior of the ice rink. The return air drawn from the interior of the ice rink is connected to the fresh air duct in front of the surface cooler through the return duct, and mixes with the outdoor air to form mixed air. A second surface heat exchanger, a condenser, a rotary dehumidifier, and a return air fan are sequentially arranged along the airflow direction in the regenerated air duct.

[0037] In this embodiment, the system also includes a solar heating system SS, which is connected in parallel with the water-cooled condenser C1 and the first surface heat exchanger SE1 and the second surface heat exchanger SE2 to provide heat for the fresh air duct.

[0038] This embodiment also provides a control method for the above-mentioned real ice rink heat and humidity control system, specifically as follows:

[0039] First, outdoor air is divided into six categories, corresponding to six regions ①, ②, ③, ④, ⑤, and ⑥ on the enthalpy-humidity chart, which are: non-fogging medium temperature zone, non-fogging high temperature and low humidity zone, non-fogging low temperature zone, non-fogging high temperature and medium humidity zone, foggy medium humidity zone, and foggy high humidity zone.

[0040] like Figure 2As shown, the specific method for constructing the six regions ①, ②, ③, ④, ⑤, and ⑥ on the enthalpy-humidity diagram is as follows: The mixing zone P between fresh air and the air inside the ice rink is determined. Then, the most unfavorable point in this zone, i.e., the point with the highest humidity, is identified. A tangent Q to the relative humidity line φ=100% is drawn from this point, thus dividing the fresh air into two parts: the theoretical non-fogging zone and the theoretical fogging zone. Based on the design temperature W and the surface temperature K of the ice rink's frame structure, temperature lines W and K are drawn on the enthalpy-humidity diagram. The humidity line NM is drawn at the intersection point M of temperature line K and the relative humidity line φ=100%. Using the above zoning method, the non-fogging zone is divided into four regions:

[0041] ① Zone: The area enclosed by the middle segment of temperature line W, temperature line K, and tangent line Q;

[0042] ② Zone: The area enclosed by the temperature line W and the humidity line NM;

[0043] ③ Zone: The area enclosed by the temperature line K and the lower segment of the tangent line Q;

[0044] ④ Zone: The area enclosed by the temperature line W, the humidity line NM, and the upper segment of the tangent line Q;

[0045] Find the most economical dehumidification point, draw a humidity line, and divide the fogging area into two regions, zone ⑤ and zone ⑥. The most economical dehumidification point is the maximum dehumidification point in the design calculation that uses only the surface cooler and evaporator for dehumidification without turning on the rotary dehumidifier.

[0046] Then, as Figure 3 As shown, the operation of the refrigeration and dehumidification unit is controlled according to the area where the fresh air parameters are located:

[0047] Case 1: When the fresh air parameters are in zone ①, only the first surface heat exchanger in the fresh air duct and the air-cooled evaporator and water-cooled condenser in the heating and cooling control module are turned on to heat the air to the design temperature W in the ice rink, and then this process ends.

[0048] Scenario 2: When the air parameters of the fresh air are in zone ②, only the evaporator in the fresh air duct and the condenser in the regenerated air duct are turned on. If the cooling capacity is sufficient to lower the air temperature to W, the process ends. Otherwise, the cooling capacity is increased, that is, the surface cooler in the fresh air duct and the air-cooled condenser and water-cooled evaporator in the cooling and heating control module are turned on to exchange heat to W, and the process ends.

[0049] Scenario 3: When the air parameters of the fresh air are in zone ③, the first surface heat exchanger in the fresh air duct is turned on first. At this time, only the air-cooled evaporator and water-cooled condenser are turned on in the heating and cooling control module. If the heat is sufficient to raise the air temperature to W, the process ends. Otherwise, the heat is increased, that is, the electric heater in the fresh air duct is turned on.

[0050] Scenario 4: When the air parameters of the fresh air are in zone ④, the surface cooler in the fresh air duct is first turned on to exchange heat with the air-cooled condenser and water-cooled evaporator in the heating and cooling control module. The process ends when the temperature reaches W. Otherwise, other equipment is turned on: if the temperature is still higher than W, the evaporator in the fresh air duct and the condenser in the regenerated air duct are turned on; if the temperature is still lower than W, the first surface heat exchanger in the fresh air duct is turned on. At this time, only the air-cooled evaporator and water-cooled condenser are turned on in the heating and cooling control module.

[0051] Situation 5: When the fresh air parameters are in zone ⑤, first turn on the surface cooler in the fresh air duct and the air-cooled condenser and water-cooled evaporator in the heating and cooling control module to exchange heat and allow the air to reach the non-fogging zone. If it cannot reach the non-fogging zone, then turn on the evaporator in the fresh air duct and the condenser in the regenerated air duct. If it reaches the non-fogging zone, it may be in situation 1, situation 2, or situation 4 above. Then perform the corresponding operations according to the above situations.

[0052] Situation 6: When the fresh air parameters are in zone 6, first turn on the surface cooler and evaporator in the fresh air duct, the condenser in the regenerated air duct, and the air-cooled condenser and water-cooled evaporator in the cooling and heating control module to allow the air to reach the non-fogging zone. If it cannot reach the non-fogging zone, then turn on the rotary dehumidifier. If it reaches the non-fogging zone, it may be in situation 1, situation 2, or situation 4 above. Then perform the corresponding operations according to the above situations.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A temperature and humidity control system for a real ice rink, characterized in that, The system includes a refrigeration and dehumidification unit and a control unit. The refrigeration and dehumidification unit includes a built-in refrigeration module and a cooling and heating control module. The built-in refrigeration module includes a surface cooler (SC), an evaporator (E3), a rotary dehumidifier (RD), a supply fan (F1), an electric heater (D), a first surface heat exchanger (SE1), a second surface heat exchanger (SE2), a condenser (C3), and a return air fan (F2). The cooling and heating control module includes a water-cooled evaporator (E1), an air-cooled evaporator (E2), a water-cooled condenser (C1), and an air-cooled condenser (C2). The refrigeration and dehumidification unit is equipped with a fresh air duct and a regenerated air duct. The fresh air duct is used to process the mixture of outdoor air and air inside the ice rink before supplying it into the ice rink. The regenerated air duct is used to process regenerated air. The surface cooler (SC), evaporator... The unit comprises an air supply fan (E3), a first surface heat exchanger (SE1), and an electric heater (D) located in the fresh air duct. The second surface heat exchanger (SE2), a condenser (C3), and a return air fan (F2) are located in the regeneration air duct. The rotary dehumidifier (RD) is located between the fresh air duct and the regeneration air duct. The air-cooled evaporator (E2) and the water-cooled evaporator (E1) are connected in parallel. The water-cooled evaporator (E1) is connected to the surface cooler (SC) to provide cooling for the fresh air duct. The air-cooled condenser (C2) and the water-cooled condenser (C1) are connected in parallel. The water-cooled condenser (C1) is connected to the first surface heat exchanger (SE1) and the second surface heat exchanger (SE2) to provide heat for the fresh air duct. The control unit is used to control the operation of each device in the refrigeration and dehumidification unit. The refrigerant outlet of the air-cooled evaporator (E2) is connected to the refrigerant outlet of the water-cooled evaporator (E1). After passing through the connecting pipe and the first compressor (CP1), it is simultaneously connected to the refrigerant inlet of the air-cooled condenser (C2) and the refrigerant inlet of the water-cooled condenser (C1). The refrigerant outlet of the air-cooled condenser (C2) is connected to the fourth valve (S4), and the refrigerant outlet of the water-cooled condenser (C1) is connected to the fifth valve (S5). After the fourth valve (S4) and the fifth valve (S5) are connected, they pass through the connecting pipe and the first throttling device (T1), and then split into two paths. One path is connected to the refrigerant inlet of the air-cooled evaporator (E2) through the third valve (S3), and the other path is connected to the refrigerant inlet of the water-cooled evaporator (E1) through the second valve (S2).

2. The real ice rink heat and humidity control system according to claim 1, characterized in that, A second compressor (CP2) and a second throttling device (T2) are respectively installed on the two connecting pipes between the evaporator (E3) on the fresh air duct and the condenser (C3) on the regenerated air duct to form a circulation system.

3. The real ice rink heat and humidity control system according to claim 1, characterized in that, A third compressor (CP3) and a first valve (S1) are installed on the connecting pipe between the water-cooled evaporator (E1) and the surface cooler (SC); a fourth compressor (CP4) and a sixth valve (S6), an eighth valve (S8) and a ninth valve (S9) for controlling the switching of the main pipeline and branch pipelines are installed on the connecting pipe between the water-cooled condenser (C1) and the first surface heat exchanger (SE1) and the second surface heat exchanger (SE2).

4. The real ice rink heat and humidity control system according to claim 1, characterized in that, The fresh air duct is sequentially equipped with a surface cooler, evaporator, rotary dehumidifier, supply fan, first surface heat exchanger, and electric heater along the airflow direction. The outlet of the fresh air duct connects to the interior of the ice rink. The return air drawn from the interior of the ice rink is connected to the fresh air duct in front of the surface cooler through the return duct, and mixes with the outdoor air to form mixed air. The regenerated air duct is sequentially equipped with a second surface heat exchanger, condenser, rotary dehumidifier, and return air fan along the airflow direction.

5. The real ice rink heat and humidity control system according to claim 1, characterized in that, It also includes a solar heating system (SS), which is connected in parallel with the water-cooled condenser (C1) and the first surface heat exchanger (SE1) and the second surface heat exchanger (SE2) to provide heat for the fresh air duct.

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