AN AIR-TO-WATER HEAT PUMP SYSTEM WITH A COMPRESSOR WHOSE SERVICE LIFE HAS BEEN IMPROVED.

Abstract

This invention extends the service life by preventing the presence of liquid phase refrigerant. an air-to-water heat pump system (1) with a compressor (2) increased by 5 and In the air-to-water heat pump system (1) the compressor (2) contains the refrigerant in the liquid phase It relates to a method that prevents the presence of fluid. Heat transfer from air to water. pump system (1); compresses the coolant, increasing its temperature and sending it to a crankshaft a compressor (2) which has a compressor (2) located at the compressor (2) outlet and from the compressor 10 (2) to a refrigerant diverter (3) that directs the outgoing refrigerant, water and a plate heat exchanger that enables heat transfer between refrigerant fluids (4) is positioned at the outlet of the plate heat exchanger (4) to regulate the pressure of the coolant. an electronic expansion valve (5) that lowers its temperature, electronic expansion valve (5) located at the outlet and condensing the refrigerant using outside air. 15 a finned tube heat exchanger (6), a liquid that stores the condensed refrigerant in liquid phase to the tank (7) and passing over the refrigerant in liquid phase to the compressor (2) an outdoor unit (9) which has a battery (8) that enables it to enter, pressurizes the water to a pump (10) that provides the circulation, which is activated as needed and the water to at least one primary heater (11) which provides heating of the water coming out of the primary heater (11) depending on the temperature, it is directed to a water tank (12) and a fan coil (13) and the first arranged between the heater (11) and the water tank (12) and the fan coil (13) from the first heater (11) enabling the water coming out to be selectively directed to the water tank (12) or to the fan coil (13). It includes an indoor unit (15) which has a water diverter (14).

Description

1 TARIFF A COMPRESSOR WITH AN IMPROVED SERVICE LIFE AIR TO WATER HEAT PUMP SYSTEM This invention extends the service life by preventing the presence of liquid phase refrigerant. an air-to-water heat pump system with an increased compressor and air-to-water 5 The presence of liquid phase refrigerant inside the compressor in a heat pump system It relates to a method that enables its prevention. Today, air-to-water heat pumps are used for heating and cooling residential buildings. The use of heat pump systems is becoming widespread. These systems heat air from water. Pump systems meet the hot water and heating needs of a residence, especially during the winter months. It is used to meet the needs of the water supply during the day, while in summer it is used to cool the environment and also to meet the need for hot water. It is used to meet. Air-to-water heat pump systems have a refrigerant line of 15 in both heating and cooling modes. It can be examined through two lines: the refrigerant line and the water line. All the components on it are referred to as the system's external unit, and these are all... The residential building is located outside the building. The water line and all components on this line are hydroelectric. They are called lines or indoor units, and all of these are within the installation that connects to the residential indoor environment. It is positioned. In heating and cooling mode, the coolant and water are placed 20 degrees apart. The critical component through which heat is transferred is the plate heat exchanger located in the outdoor unit. Temperature difference between night and day in air-to-water heat pump systems During changes, the system components are located in different regions such as the indoor and outdoor environments. Due to their masses, their temperatures vary. The system remains at 25 for a long time. When not in use, the system pressure at any temperature is the lowest of the system levels. In the low-temperature region, the refrigerant in the liquid phase accumulates. Risk of damage to the compressor if refrigerant accumulates in the compressor. This is the case. In systems operating within the known state of the art, this situation needs to be balanced. In addition to the compressor's own battery, the system also requires an auxiliary battery. 30 is used. The total volume of the two batteries when they are switched off is... 2 Although it may be sufficient to store the refrigerant in the liquid phase, the individual system components Due to its inertia, the compressor can also be one of the coldest components in the system. To prevent the risk of refrigerant accumulation in the liquid phase inside the compressor and... Depending on the situation, potential damage to the compressor may occur during medium to long-term use. To prevent this, preferably 5°C is used to heat the refrigerant inside the compressor. A detailed inspection of the compressor crankshaft heater, which is completely surrounded by the compressor, is quite... This becomes critical. If the refrigerant inside the compressor transitions to the liquid phase... If left unchecked, the compressor can malfunction and wear out. Compressor malfunction In this case, the system is unable to perform any functions and may become worn out. Capacity, efficiency, energy consumption and sound power level vary depending on the severity of wear and tear. and similarly, a loss of performance is experienced. Compressor malfunction or Wear and tear also leads to user dissatisfaction. A European patent document, numbered EP3943822, which is included in the prior art, The document refers to a heat pump system, and the heat described in the document is 15. The use of a damper to prevent refrigerant leakage in the pump system and The control of this is explained. In the European patent document numbered EP2450637, which is included in the known state of the art, the air We are talking about a complex system for conditioning and water supply. The 20 in question... The system utilizes an air conditioning unit and a hot water unit. Hot water By adding a second heat pump to the unit, a cascaded current is supplied to the system's condenser. The connection is being made. Therefore, in the known state of the art, especially when it contains a refrigerant in the liquid phase 25 a compressor whose lifespan risk is reduced due to its formation An air-to-water heat pump system is required. One aim of this invention is to prevent the presence of liquid phase refrigerant within it. an air-to-water heat pump system with a compressor that has an extended service life 30 to accomplish. 3 Another purpose of this invention is to place it inside the compressor in air-to-water heat pump systems. a method that prevents the presence of refrigerant in the liquid phase to accomplish. The initial requirement and the requirements dependent on it, which are implemented to achieve the purpose of this invention, are 5 an outdoor unit that is defined and in which the refrigerant cycle is performed, an indoor unit in which water circulation takes place, and an outdoor unit that is placed inside it. a plate heat exchanger that enables heat transfer between the coolant and the water The heat exchanger is placed inside the outdoor unit and transfers the refrigerant from the outside unit to the heat exchanger. a compressor that provides the cycle, to properly direct the refrigerant. a refrigerant diverter arranged between the compressor and the plate heat exchanger and a liquid tank connected to a plate heat exchanger, containing water and coolant depending on the heat transfer that takes place between them, in cooling mode and heating mode. a viable air-to-water heat pump system; refrigerant inside the compressor At least one primary sensor configured to detect its temperature and / or pressure, 15 at least one secondary element configured to heat the refrigerant inside the compressor heater, refrigerant recirculation line, excluding compressor inlet and outlet to sense the temperature and / or pressure of the refrigerant at least at one point at least one second sensor is arranged by the first sensor and the second sensor by comparing the perceived temperature and / or pressure values ​​with each other, the 20 in question Depending on the comparison process, either the second heater is activated or... at least one control unit configured to decide whether or not to operate it It includes. In an air-to-water heat pump system, the refrigerant inside the compressor... fluid temperature and / or pressure, other factors involved in the refrigerant cycle When the temperature and / or pressure value obtained from the components drops below 25, the control unit... By activating the second heater, there is a possibility that the second heater is in the liquid phase inside the compressor. This allows the compressor to heat the refrigerant inside. In this way, the liquid inside the compressor... By preventing refrigerant accumulation in the phase, compressor failure or By preventing wear and tear, a decrease in user satisfaction is avoided. 30 4 In one application of the invention, the second sensor is located at the inlet and / or outlet of the plate heat exchanger. and / or at the finned tube heat exchanger outlet and / or battery inlet. In one application of the invention, the control unit is controlled by the first sensor and the second sensor. After comparing the detected temperature and / or pressure values, 5 from the first sensor detecting that the values ​​obtained from the first sensor are lower than the values ​​obtained from the second sensor. In this case, the values ​​received from the first sensor are compared with the values ​​received from the second sensor. It is configured to activate the second heater until the temperature rises. In one application of the invention, the control unit activates the second heater after 10 The values ​​from the first sensor are superimposed on the values ​​from the second sensor. When it comes out, it starts the second heater for a predetermined first period of time. continue and after this first period has elapsed, turn on the second heater. It is configured to terminate. 15 In one application of the invention, the control unit activates the second heater after it has been started. The values ​​received from the first sensor over a predetermined second period are then transferred to the second sensor. The second heater will operate if the values ​​received from the sensor do not exceed the specified values. to terminate and after a predetermined period of time has passed, turn on the second heater. It is being configured to run again. 20 The sixth claim, and the requirements associated with it, were implemented to achieve the purpose of this invention. In an air-to-water heat pump system defined in the requirements, the liquid inside the compressor A method that prevents the presence of refrigerant in the compressor phase; temperature and / or pressure of the refrigerant inside and refrigerant circulation line 25 the temperature at at least one point other than the compressor inlet and outlet and / or comparison of pressure values ​​and the temperature and / or pressure comparison in question. Designed to heat the refrigerant inside the compressor depending on the process. The invention includes the steps for operating or deactivating a second heater. In the method in question, the compressor operating in the air-to-water heat pump system is 30. the temperature and / or pressure of the refrigerant within the refrigerant cycle 5 below the temperature and / or pressure value obtained from other components performing the function When it descends, the second heater is activated, which may result in the compressor being in liquid phase. The refrigerant inside the compressor is heated. This allows the compressor to function properly. By preventing the accumulation of refrigerant in the liquid phase, compressor failure or By preventing wear and tear, a decrease in user satisfaction is avoided. 5 In one application of the invention, the method involves adjusting the temperature of the refrigerant inside the compressor. and / or pressure value obtained from other components in the relevant circuit. If the temperature and / or pressure value is lower than expected, inside the compressor... the temperature and / or pressure value of the refrigerant is the temperature and / or pressure value in the circulation line. This involves activating the second heater until the pressure value exceeds the specified level. In one application of the invention, the method involves activating the compressor after the second heater has been started. the temperature and / or pressure value of the refrigerant inside the circuit When the temperature and / or pressure value exceeds that obtained from other components, the second 15 the heater must continue to operate for a predetermined initial period of time and the second heater will be switched off after this first period has elapsed. It includes the step. In one application of the invention, the method is further extended after the second heater is activated, reaching 20... the refrigerant inside the compressor for a predetermined second period of time temperature and / or pressure value taken from other components in the circuit and / or the operation of the second heater if the pressure value cannot be exceeded termination and after a predetermined period has passed, the second This includes the step of restarting the heater. 25 The invention modifies the refrigerant temperature and / or pressure within the compressor. below the refrigerant temperature in other components involved in the fluid cycle When the temperature drops, the second heater is activated to cool the refrigerant inside the compressor. 30 by heating the compressor and having the refrigerant in liquid phase inside. 6 an air-to-water heat pump system that prevents or minimizes heat loss is being carried out. An air-to-water heat pump system has been added to achieve the purpose of this invention. This is shown in the figure; this figure is 5 Figure 1 - Schematic of an application of the air-to-water heat pump system that is the subject of the invention. It is the appearance. The parts shown in the figures are individually numbered, and each number corresponds to the following: given below. 10 1- Air-to-water heat pump system 2- Compressor 3- Refrigerant guide 4- Plate heat exchanger 5- Electronic expansion valve 15 6- Finned tube heat exchanger 7- Liquid tank 8- Battery 9- Outdoor unit 10- Pump 20 11- First heater 12- Water tank 13- Fancoil 14- Water diverter 15 - Indoor unit 25 16- First sensor 17- Second heater 18- Second sensor Cooling is achieved through heat transfer between water and coolant. air to water heat pump system (1) which can operate in cooling mode and heating mode, cooler 7 a compressor (2) which increases the temperature of the fluid by compressing it and has a crankshaft, refrigerant located at the compressor (2) outlet and exiting from the compressor (2) a refrigerant directing (3) between water and refrigerant plate heat exchanger (4) which enables heat transfer to take place, plate heat exchanger (4) a 5 positioned at the outlet that reduces the pressure and temperature of the refrigerant. to the electronic expansion valve (5), located at the outlet of the electronic expansion valve (5) and a finned tube heat exchanger that condenses the refrigerant via ambient air (6) a liquid tank (7) that stores the condensed refrigerant in liquid phase and in liquid phase to a battery (8) that allows the coolant to pass through and enter the compressor (2) an outdoor unit (9) has a pump (10) that pressurizes the water and provides its circulation. at least one primary heater that activates as needed and provides water heating. (11) is directed to a water source depending on the temperature of the water coming out of the first heater (11). water tank (12) and fan coil (13) and first heater (11) By arranging between them, the water coming out of the first heater (11) is selectively fed into the water tank (12) or an indoor 15 which has a water diverter (14) that directs the water to the fan coil (13). It includes unit (15). Air to water heat pump system (1) when operating in heating mode. In the outdoor unit (9), gas phase is compressed at high temperature from the compressor (2) and exits refrigerant flow via a refrigerant diverter (3) such as a four-way valve Water is transferred to the plate heat exchanger (4) and cycled in the indoor unit (15) between them. Heat transfer is taking place. The coolant fluid at high temperature and pressure transfers heat. By transferring its energy to the water, the coolant condenses and changes phase, heating the water. The pressure and temperature of the refrigerant exiting the plate heat exchanger (4) in liquid phase are equal. The temperature is then reduced by means of an electronic expansion valve (5). The coolant, whose pressure is reduced, is preferably passed through a finned tube heat exchanger (6). Heat transfer is achieved by passing outside air through with the help of a fan, and the refrigerant is 25 The refrigerant coming out of the finned tube heat exchanger (6) is completely evaporated. again, the refrigerant is passed through the battery (8) via the refrigerant guide (3) to the compressor (2) It is directed. Thus, in heating mode, the refrigerant cycle in the outdoor unit (9) It is completed. When operating in heating mode, the heat comes out of the plate heat exchanger (4) Water is sent to the indoor unit (15) via the water pump (10). 30 coming out of the plate heat exchanger (4) from a first heater that is put into operation according to the water heating capacity requirement (11) 8 It can be passed through. Although the first heater (11) in question is not operated continuously. It is usually activated when high heating capacity is required at very low ambient temperatures. Hot water from the first heater (11) enters through a water diverter such as a three-way valve. (14) via water tank (12) depending on the temperature information either to water tank (12) or The hot water in the water tank (12) is directed to the fan coil (13). While in use, the water directed to the fan coil (13) is used for ambient heating. Fan coil (13) and the water coming out of the water tank (12) is sent back to the plate heat exchanger (4) by means of pump (10) With the transmission, the water cycle is completed in the indoor unit (15). Air to water heat pump When the system (1) is operating in cooling mode, the gas coming out of the compressor (2) in the outdoor unit (9) high pressure hot coolant in phase of the coolant guide (3) 10 Due to the change of direction according to the heating mode, instead of a plate heat exchanger (4) a finned heat exchanger It is sent to the finned tube heat exchanger (6). Preferably by means of a fan, to the finned tube heat exchanger (6) Heat transfer between the refrigerant and the air by passing outside air through it. is provided. After this, the coolant goes to the liquid tank (6). Liquid The coolant in phase one first passes through the electronic expansion valve (5) and its pressure is 15 The water is then circulated in the plate heat exchanger (4) in the indoor unit (15) It evaporates by transferring heat. Water transfers its heat to the coolant fluid. it is cooling and the cooling water goes to the first heater (11) but the system (1) cooling Since it is in this mode, the first heater (11) is not working. The water is in the water tank (12) or water directing (14) system (1) cooling 20 Since it is in this mode, it switches to the position where it directs the water directly to the fan coil (13). In this mode, cold water is used solely for cooling the environment. Domestic water. Since hot water is generally desired, the system (1) adjusts itself to the temperature value (12) in the water tank. It can automatically switch to heating mode if the water temperature falls below a certain value. When it comes down, the system (1) switches to heating mode and water is supplied by the water router (14) 25 It is directed to the tank (12). After that, the water is pumped back to the plate tank (10) by means of a pump. The water cycle in the indoor unit (15) is completed by sending it to the heat exchanger (4). The subject of the invention is an air-to-water heat pump system (1), the refrigerant inside the compressor (2). at least one first 30 configured to sense fluid temperature and / or pressure The sensor (16) is configured to heat the refrigerant inside the compressor. 9 a small second heater (17), compressor (2) with battery (8) outlet in the refrigerant cycle line except for the refrigerant inlet and compressor (2) outlet and refrigerant guide (3) To detect the temperature and / or pressure of the refrigerant in the fluid circulation line. at least one second sensor (18) and the first sensor (16) and the second sensor are arranged in such a way. Compare the temperature and / or pressure values ​​detected by the sensor (18) with each other. by comparing the second heater (17) depending on the comparison process in question at least one control unit configured to monitor its operation (as shown in the figures) (not shown) includes. The subject of the invention is an air-to-water heat pump system. (1), refrigerant temperature and / or pressure inside the compressor (2), refrigerant Temperature and / or pressure obtained from other components involved in the fluid cycle 10 When the value drops below this value, the control unit activates the second heater (17) and activates the second heater. (17) refrigerant which may be in liquid phase inside the compressor (2) It provides heating. In this way, the refrigerant in the liquid phase is inside the compressor (2). by preventing accumulation of waste, the compressor (2) will not malfunction or wear out. This prevents a decrease in user satisfaction. 15 In one application of the invention, the second sensor (18) is placed at the inlet of the plate heat exchanger (4) and / or at the outlet and / or at the finned tube heat exchanger (6) outlet and / or at the battery (8) inlet It is being organized. 20 In one application of the invention, the control unit consists of the first sensor (16) and the second sensor (18) After comparing the temperature and / or pressure values ​​detected by the first The values ​​received from sensor (16) are lower than the values ​​received from the second sensor (18) If it detects that it is the second sensor, the values ​​received from the first sensor (16) are the second sensor. 25 Operate the second heater (17) until the values ​​received from the sensor (18) exceed the values ​​received from the sensor (18) It is structured in such a way that the refrigerant inside the compressor (2) its temperature and pressure are higher than other components involved in the refrigeration cycle by ensuring that the refrigerant is in liquid phase inside the compressor (2) This is being prevented. 30 10 In one application of the invention, the control unit is activated after the second heater (17) is started. The values ​​received from the first sensor (16) are compared with the values ​​received from the second sensor (18). When it goes on top of the second heater (17) for a predetermined first period of time to continue operating and after this first period expires the second heater (17) It is structured to finalize its operation. The first period in question is producer 5 is determined by the first time in the liquid phase inside the compressor (2) sufficient time for the refrigerant to migrate to other components It is determined. In one application of the invention, the control unit activates the second heater (17) after 10 values ​​taken from the first sensor (16) during a second period determined beforehand If the values ​​received from the second sensor (18) do not exceed the values ​​of the second heater (17) to end the work and after a predetermined period of time has passed The second heater (17) is configured to restart. In this application, the second By not operating the heater (17) continuously, energy savings are achieved. Also 15 This procedure is repeated a predetermined number of times, and in the final repetition, again... During the second period, the values ​​received from the first sensor (16) are received from the second sensor (18) If it cannot exceed the values ​​obtained, it is terminated again and the second heater (17) is activated. It is not being operated again. 20 This invention also applies to liquid inside the compressor (2) in an air-to-water heat pump system (1). It relates to a method that prevents the presence of refrigerant in the phase. The method in question is the temperature and / or of the refrigerant inside the compressor (2). with pressure of the coolant in the coolant cycle line with the battery (8) outlet compressor (2) inlet and compressor (2) outlet with refrigerant diverter (3) 25 Comparison of temperature and / or pressure values ​​at any point other than the one mentioned. and depending on the temperature and / or pressure comparison process in question, the compressor (2) a second heater (17) designed to heat the coolant inside It includes the steps for controlling its operation. In the method described in the invention, from the air... The refrigerant in the compressor (2) operating in the water heat pump system (1) is 30 temperature and / or pressure, from other components involved in the refrigerant cycle 11 When the temperature and / or pressure value falls below the obtained temperature and / or pressure value, the second heater (17) by operating the compressor (2) the refrigerant which may be in liquid phase inside The heating of the fluid is ensured. In this way, the fluid in the liquid phase inside the compressor (2) By preventing the accumulation of refrigerant, the compressor (2) may fail or By preventing wear and tear, a decrease in user satisfaction is avoided. 5 In one application of the invention, the method involves the refrigerant inside the compressor (2). the temperature and / or pressure value taken from the relevant circuit line If the pressure value is lower than the coolant inside the compressor (2) The fluid temperature and / or pressure value is 10 times the temperature and / or pressure in the circuit line. This involves operating the second heater until the value exceeds the specified level. Thus, the cooling temperature and pressure of the refrigerant inside the compressor (2) by ensuring that the coolant level is higher than that of other components in the cycle. This prevents the fluid from being in liquid phase inside the compressor (2). 15 In one application of the invention, the method is to start the second heater (17) after temperature and / or pressure value of the refrigerant inside the compressor (2) cycle When the temperature and / or pressure value in the line exceeds the second heater (17) to continue operating for a predetermined first period and this first After the time expires, the step of terminating the operation of the second heater (17) is 20 It includes. The first period in question is determined by the manufacturer, and the first period migration of the refrigerant in the liquid phase inside the compressor (2) to other components It is determined as a sufficient period of time. In one application of the invention, the method is further 25 after the second heater (17) is activated. refrigerant inside the compressor (2) for a second predetermined period of time temperature and / or pressure value above the temperature and / or pressure value in the circuit line If it does not come out, the operation of the second heater (17) is terminated and as previously restarting the second heater (17) after a specified period of time has passed It includes step 30. In this application, the second heater (17) is not operated continuously, thus saving energy. This ensures that savings are achieved. Furthermore, this practice is based on a predetermined system. 12 it is repeated a number of times and in the last repetition again from the first sensor (16) during the second period If the received values ​​cannot exceed the values ​​received from the second sensor (18) The second heater (17) is not switched on again by ending it once more. With this invention, the temperature and / or pressure of the refrigerant inside the compressor (2) is 5 below the refrigerant temperature in other components involved in the fluid cycle When the coolant inside the compressor drops, the second heater (17) is activated to cool the refrigerant inside the compressor. by heating the compressor (2) there is a refrigerant in liquid phase inside an air-to-water heat pump system that prevents or minimizes heat loss (1) is being carried out. 10

Claims

13 REQUESTS 1. Depending on the heat transfer that takes place between the water and the coolant. It can operate in cooling and heating modes; by compressing the refrigerant. a compressor (2) which increases its temperature and has a crankshaft, compressor 5 (2) located at the outlet and the refrigerant coming out of the compressor (2) a refrigerant directing (3), water and refrigerant a plate heat exchanger (4) that enables heat transfer between them By positioning it at the outlet of the plate heat exchanger (4), the pressure of the coolant and an electronic expansion valve (5) that lowers its temperature, electronic expansion valve 10 (5) located at the outlet and coolant through the outside air In a finned tube heat exchanger (6) that condenses the refrigerant in liquid phase to a liquid tank (7) and over the coolant in liquid phase an outdoor unit which has a battery (8) that enables it to pass through to the compressor (2) (9), a pump that provides circulation by pressurizing the water (10), 15 depending on the need to at least one primary heater (11) which comes into operation and heats the water, water is directed depending on the temperature of the water coming out of the first heater (11) to the tank (12) and a fan coil (13) and the first heater (11) with water tank (12) and fan coil (13) by arranging the water coming out of the first heater (11) selectively water 20 to a water diverter that directs water to the tank (12) or fan coil (13) (14) containing an indoor unit (15) with refrigerant inside the compressor (2) at least one configured to sense fluid temperature and / or pressure The first sensor (16) is to heat the refrigerant inside the compressor. At least one second heater (17) is configured in the refrigerant cycle line to the battery (8) outlet with compressor (2) inlet and compressor (2) outlet with refrigerant 25 except for the router (3) on the refrigerant recirculation line at least one designed to sense the temperature and / or pressure of the fluid by the second sensor (18) and the first sensor (16) and the second sensor (18) by comparing perceived temperature and / or pressure values ​​with each other Depending on the subject of the comparison process, the operation of the second heater (17) 30 14 characterized by at least one control unit configured to control it an air to water heat pump system (1).

2. Plate heat exchanger (4) inlet and / or outlet and / or finned tube heat exchanger (6) 5 characterized by the second sensor (18) arranged at the output and / or input of the battery (8). an air-to-water heat pump system as in Claim 1 (1).

3. Temperature detected by the first sensor (16) and the second sensor (18) and / or after comparing the pressure values ​​received from the first sensor (16) It was determined that the values ​​were lower than the values ​​received from the second sensor (18). If this happens, the values ​​received from the first sensor (16) are received from the second sensor (18) to operate the second heater (17) until the received values ​​exceed the values. a control unit as in Claim 1 or 2, characterized by the configured control unit air to water heat pump system (1). 15 4. After the second heater (17) is switched on, the reading received from the first sensor (16) When the values ​​exceed the values ​​received from the second sensor (18), the second keep the heater (17) running for a predetermined first period of time to start the second heater (17) after the first period has elapsed. 20 characterized by a control unit configured to terminate an air-to-water heat pump like any of the above requirements system (1).

5. After the second heater (17) is switched on, a second heater is switched on at a predetermined time. During the period, the values ​​received from the first sensor (16) were received from the second sensor (18) 25 If the values ​​obtained do not exceed the operating values, the operation of the second heater (17) to terminate and after a predetermined period has passed, the second characterized by the control unit configured to restart the heater (17). Heat transfer from air to water, as in any of the above requests pump system (1). 30 15 6. In an air-to-water heat pump system (1) in the compressor (2) in liquid phase It is a method that prevents the presence of refrigerant; its characteristic feature is: temperature and / or pressure of the refrigerant inside the compressor (2) refrigerant in the refrigerant cycle line with the battery (8) outlet and compressor (2) inlet and compressor (2) outlet and refrigerant guide (3) except 5 Comparison of temperature and / or pressure values ​​at any remaining point and compressor depending on the temperature and / or pressure comparison process in question (2) a second heater designed to heat the coolant inside (17) includes the steps to check the study. 10 7. Temperature and / or pressure value of the refrigerant inside the compressor (2) lower than the temperature and / or pressure value obtained from the circuit in question In this case, the temperature of the refrigerant inside the compressor (2) and / or pressure value above the temperature and / or pressure value in the circuit line Claim 15 is characterized by the step of operating the second heater until it comes out. an air-to-water heat pump system like the one in 6 (1).

8. After the second heater (17) is switched on, the compressor (2) inside the temperature and / or pressure value of the refrigerant at the temperature in the circuit line and / or when the pressure value exceeds 20, the second heater (17) was previously 20 to continue operating for a specified first period and this first termination of operation of the second heater (17) after the time expires an air-to-water heat transfer as in Claim 6 or 7, characterized by the step. pump system (1). 25 9. After the second heater (17) is switched on, a second heater, as determined beforehand, is switched on. the temperature and / or of the refrigerant inside the compressor (2) during the period pressure value above temperature and / or pressure value in the circuit If it does not come out, the operation of the second heater (17) is terminated and further After a predetermined period of time has passed, the second heater (17) will be turned on again at 30 Any of Claims 6 through 8, characterized by the execution step such as an air-to-water heat pump system (1).

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