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EP2434231B1 - Wärmepumpenvorrichtung und verfahren zur steuerung eines regelventils - Google Patents

Wärmepumpenvorrichtung und verfahren zur steuerung eines regelventils Download PDF

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Publication number
EP2434231B1
EP2434231B1 EP09844887.1A EP09844887A EP2434231B1 EP 2434231 B1 EP2434231 B1 EP 2434231B1 EP 09844887 A EP09844887 A EP 09844887A EP 2434231 B1 EP2434231 B1 EP 2434231B1
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EP
European Patent Office
Prior art keywords
temperature
sensed
temperature sensor
compressor
water
Prior art date
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Active
Application number
EP09844887.1A
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English (en)
French (fr)
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EP2434231A1 (de
EP2434231A4 (de
Inventor
Kengo Takahashi
Ryo Oya
Kazuki Okada
Takahiro Ushijima
Hirokazu Minamisako
Shinichi Uchino
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Publication of EP2434231A4 publication Critical patent/EP2434231A4/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00—Heat pumps
    • F25B30/02—Heat pumps of the compression type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/219—Temperature of the water after heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/258—Outdoor temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/305—Control of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B31/00—Compressor arrangements
    • F25B31/006—Cooling of compressor or motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/12—Heat pump
    • F24D2200/123—Compression type heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • F24H4/02—Water heaters
    • F24H4/04—Storage heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/047—Water-cooled condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2106—Temperatures of fresh outdoor air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2115—Temperatures of a compressor or the drive means therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2117—Temperatures of an evaporator
    • F25B2700/21171—Temperatures of an evaporator of the fluid cooled by the evaporator

Definitions

  • the present invention relates to a heat pump type hot-water supply outdoor apparatus.
  • Patent Literature 1 Since a compressor of a refrigeration cycle becomes a high temperature during the operation, it is sometimes expected to cool the compressor (Patent Literature 1). Moreover, as a measure for the state of refrigerant being accumulated (called accumulation/liquefaction) in the compressor, it is sometimes expected to heat the compressor (Patent Literature 2).
  • a water jacket connected to a flow passage branching from a water circuit is twisted around a compressor.
  • the temperature of the water jacket is controlled by measuring an outlet temperature of the water jacket with a temperature sensor (e.g., Patent Literature 1).
  • Patent Literature 1 the quantity of water inflowing to the water jacket which is used for the compressor of the heat pump type hot-water supply outdoor apparatus is controlled based on a temperature sensed by a temperature sensor provided at the outlet of the water-jacket. For this reason, there is a problem that it is impossible to control the temperature of the compressor shell according to both the temperature of the water flowing into the water jacket and the temperature of the compressor shell.
  • a heat pump type hot-water supply outdoor apparatus that can control the temperature of the compressor, based on the water temperature of a water circuit and the temperature of the compressor.
  • Fig. 1 shows a configuration diagram of a heat pump type hot-water supply outdoor apparatus 1a (heat pump apparatus) according to Embodiment 1.
  • the refrigerant circuit side through which refrigerant circulates, starts from the discharge side of a compressor 2, passes through a water-refrigerant heat exchanger 3 (condenser), an expansion valve 4, and an air heat exchanger 5 (evaporator), and connects to the inlet side of the compressor 2.
  • the refrigeration cycle includes the compressor 2, the water-refrigerant heat exchanger 3, the expansion valve 4, and the air heat exchanger 5.
  • the water circuit side through which a circulating pump 40 circulates water, configures a main water circuit 7 (main circuit) that starts from a hot water storage tank 30, passes through the water-refrigerant heat exchanger 3, and returns to the hot water storage tank 30. That is, the main water circuit 7 flows into the water-refrigerant heat exchanger 3 from the hot water storage tank 30, and flows out of the water-refrigerant heat exchanger 3 to return to the hot water storage tank 30.
  • a branch water circuit 8 (branch path) is connected in parallel to the main water circuit 7. Before flowing to the water-refrigerant heat exchanger 3 from the main water circuit 7, the branch water circuit 8 branches from the main water circuit 7. That is, the branch water circuit 8 branches in parallel to the main water circuit 7, at the branch A at the inlet side of the water-refrigerant heat exchanger 3 and at the branch B at the outlet side of it.
  • the branch water circuit 8 branches from the main water circuit 7 at the branch A before the flow into the water-refrigerant heat exchanger 3, and, through a water flow valve 9 and a water jacket 10, joins the main water circuit 7 having flowed out of the water-refrigerant heat exchanger 3 at the branch B.
  • the heat pump type hot-water supply outdoor apparatus 1a is provided with the refrigeration cycle, which includes the compressor 2, the water-refrigerant heat exchanger 3, the expansion valve 4, and the air heat exchanger 5, the water flow valve 9 (regulating valve), the water jacket 10, a shell temperature detection sensor 6 (first sensor), a water temperature sensor 11 (second sensor), and a control apparatus 20a.
  • Fig. 2 shows a hardware structure of the control apparatus 20a.
  • the control apparatus 20a includes a CPU 810 (Central Processing Unit) which executes programs.
  • the CPU 810 is connected via a bus 825 to a ROM (Read Only Memory) 811, a RAM (Random Access Memory) 812, and an I/F (Interface) unit 816, and controls these hardware devices.
  • ROM Read Only Memory
  • RAM Random Access Memory
  • I/F Interface
  • the ROM 811 is an example of a nonvolatile memory.
  • the ROM 811 there are stored programs that execute functions of the control apparatus 20a and set values T 1 , T 2 , etc. that are to be described later.
  • the programs of the ROM 811 are read out and executed by the CPU 810.
  • the RAM 812 is an example of a volatile memory.
  • the RAM 812 there are stored temperatures sensed by the shell temperature detection sensor 6 and the water temperature sensor 11, a control signal to be transmitted to the water flow valve 9, information on "judgment result”, “calculation result”, “generation result”, “processing result”, etc. performed by the CPU 810, data, signal values, variable values, parameters, etc.
  • the ROM 811 and the RAM 812 are examples of a storage device or a storage unit.
  • the I/F unit 816 is an example of a communication unit.
  • the I/F unit 816 is connected to the water flow valve 9, the shell temperature detection sensor 6, the water temperature sensor 11, etc.
  • high temperature refrigerant 51 discharged from the compressor 2 flows into the water-refrigerant heat exchanger 3. After giving heat to low temperature water 61 of the main water circuit 7, the high temperature refrigerant 51, as low temperature refrigerant 52, passes through the expansion valve 4 and the air heat exchanger 5, and returns to the inlet side of the compressor 2.
  • the low temperature water 61 flowing from the hot water storage tank 30 by the circulating pump 40 flows into the water-refrigerant heat exchanger 3, and since the temperature of the water increases by performing heat exchange with the high temperature refrigerant 51, becomes high temperature water 62 whose temperature is higher than that of the low temperature water 61 and returns to the hot water storage tank 30.
  • the control apparatus 20a opens the water flow valve 9 in order to flow water through the water jacket 10.
  • the compressor 2 is heated due to letting the water flow through the water jacket 10. That is, the control apparatus 20a inputs temperatures (detection signals) sensed by the shell temperature detection sensor 6 and the water temperature sensor 11, and compares T(6) with T(11). Then, if it is judged that T(6) ⁇ T(11), the control apparatus 20a generates a control signal indicating to open the water flow valve 9 and outputs it to the water flow valve 9.
  • the control apparatus 20a inputs temperatures (detection signals) sensed by the shell temperature detection sensor 6 and the water temperature sensor 11, and compares T(6) with T(11). Then, if it is judged that T(6) > T(11), the control apparatus 20a generates a control signal indicating to open the water flow valve 9 and outputs it to the water flow valve 9.
  • the control apparatus 20a does not apply the Expressions 1 and 2 as they are.
  • T(6)>T(11) it may be acceptable not to open the water flow valve 9 (when not expecting to cool the compressor by the water any more) if the temperature sensed by the shell temperature detection sensor 6 is less than or equal to a certain set value T 2 . That is, when T 2 ⁇ T 6 > T 11 the water flow valve 9 is not opened since it is not necessary to cool the compressor 2.
  • Fig. 3 typically shows the cases of Expressions 3 and 4.
  • the arrow indicates a temperature T.
  • (a) of Fig. 3 shows the Expression 3. That is, when T(6) is greater than or equal to the set value T 1 , even if T(6) ⁇ T(11) is satisfied, the control apparatus 20a does not open the water flow valve 9.
  • (b) of Fig. 3 shows the Expression 4. That is, when T(6) is less than or equal to the set value T 2 , even if T(6) > T(11) is satisfied, the control apparatus 20a does not open the water flow valve 9.
  • FIG. 3 is a schematic diagram of the case where Expressions 3 and 4 are reflected in the control performed by the control apparatus 20a.
  • the control apparatus 20a keeps the water flow valve 9 closed regardless of the value of T(11).
  • control apparatus 20a controls the water flow valve 9 to close.
  • control apparatus 20a controls the water flow valve 9 to close.
  • Fig. 4 shows a flowchart of heating the compressor 2 in order to prevent accumulation/liquefaction of the refrigerant, when starting the operation of the compressor 2.
  • Fig. 5 shows a flowchart of cooling the compressor 2 in order to prevent overheating of the compressor 2, while the compressor 2 is in operation.
  • a sensed temperature T(6) (hereinafter also called a shell temperature) sensed by the shell temperature detection sensor 6 being lower than a set value T 1 (in the case of the compressor 2 being cold)
  • the shell temperature T(6) is further compared with a sensed temperature T(11) (hereinafter also called a sensed water temperature) sensed by the water temperature sensor 11. Since it is possible to perform heating when the sensed water temperature T(11) is higher than the shell temperature T(6), the water flow valve 9 is opened to heat the compressor 2. Then, when the shell temperature T(6) exceeds a "set value T 1 + ⁇ ", the water flow valve 9 is closed (heating is stopped).
  • the compressor 2 shall be in a stopped condition and the water flow valve 9 shall be closed.
  • control apparatus 20a starts to control the water flow of the water jacket 10.
  • this control it is possible to prevent the state (accumulation/liquefaction of refrigerant) in which refrigerant of the refrigeration cycle melts, as liquid refrigerant, into refrigerant oil of the compressor 2 in a stopped condition.
  • the control apparatus 20a compares a shell temperature T(6) with a set value T 1 (e.g., 5 °C). Since it is not necessary to perform heating when the shell temperature T(6) ⁇ the set value T 1 , the control apparatus 20a keeps the water flow valve 9 closed (S109).
  • T 1 e.g., 5 °C
  • the control apparatus 20a compares the shell temperature T(6) with a sensed water temperature T(11) in order to judge whether heating can be performed by using the water flow or not (S104).
  • the control apparatus 20a Since it is impossible to perform heating when the shell temperature T(6) ⁇ the sensed water temperature T(11), the control apparatus 20a keeps the water flow valve 9 closed (S110).
  • the control apparatus 20a controls the water flow valve 9 to open (S105).
  • Fig. 5 there will be explained the case of cooling the compressor 2 by the control apparatus 20a while the compressor 2 is in operation.
  • the brief summary of Fig. 5 is as follows: In the case of a shell temperature T(6) being higher than a set value T 2 (in the state of the compressor 2 being overheated), the shell temperature T(6) is further compared with a sensed water temperature T(11) detected by the water temperature sensor 11. Since it is possible to perform cooling when the sensed water temperature T(11) is lower than the shell temperature T(6), the water flow valve 9 is opened to cool the compressor 2. Then, when the shell temperature T(6) becomes less than a "set value T 2 + ⁇ ", the water flow valve 9 is closed (cooling is stopped).
  • the flowchart of Fig. 5 will now be explained.
  • control apparatus 20a starts to control the water flow of the water jacket 10.
  • the compressor 2 in operation is prevented from being overheated by this control.
  • the control apparatus 20a compares a shell temperature T(6) with a set value T 2 (e.g., 90 °C). Since it is not necessary to perform cooling when the shell temperature T(6) ⁇ the set value T 2 , the control apparatus 20a keeps the water flow valve 9 closed (S209).
  • T 2 e.g. 90 °C
  • the control apparatus 20a compares the shell temperature T(6) with a sensed water temperature T(11) in order to judge whether cooling can be performed by using the water flow or not (S204).
  • the control apparatus 20a Since it is impossible to perform cooling when the shell temperature T(6) ⁇ the sensed water temperature T(11), the control apparatus 20a keeps the water flow valve 9 closed (S210).
  • the control apparatus 20a controls the water flow valve 9 to open (S205).
  • FIG. 6 shows the installation position of the water temperature sensor 11.
  • Fig. 1 shows the case in which the water temperature sensor 11 is installed in the vicinity of the branch A at the inlet side of the water-refrigerant heat exchanger 3, since what is needed for the water temperature sensor 11 is only to sense a temperature of water before inflowing to the water-refrigerant heat exchanger 3, it is also preferable to install the water temperature sensor, as shown in Fig. 6 as a water temperature sensor 11-1, to be in the vicinity of the branch water circuit 8 between the branch A at the inlet side of the water-refrigerant heat exchanger 3 and the water flow valve 9.
  • the water temperature sensor may be installed to be upstream of and in the vicinity of the water flow valve 9, in the branch water circuit 8.
  • the control apparatus 20a judges to control the water flow valve 9 for flowing water to the water jacket 10, based on temperatures sensed by the shell temperature detection sensor 6 and the water temperature sensor 11. Therefore, depending on the compressor 2 (temperature of the compressor 2) and the water temperature, it is possible to collect useless heat loss from the compressor 2 or to reduce electric power for keeping the compressor 2 warm (to reduce standby electricity).
  • the shell temperature detection sensor 6 is a sensor originally existing for controlling the refrigerant
  • the water temperature sensor 11 is a sensor originally existing for controlling the temperature of hot water to be supplied.
  • the heat pump type hot-water supply outdoor apparatus 1b of preferred Embodiment 2 further includes an ambient air temperature sensor 12 (third temperature sensor) that senses an ambient air temperature.
  • control apparatus 20a judges to control the water flow valve 9, based on temperatures sensed by the shell temperature detection sensor 6 and the water temperature sensor 11.
  • a control apparatus 20b also uses a temperature sensed by the ambient air temperature sensor 12.
  • Fig. 7 shows a configuration diagram of the heat pump type hot-water supply outdoor apparatus 1b according to preferred Embodiment 2.
  • Fig. 7 differs from Fig. 1 of Embodiment 1 in that the ambient air temperature sensor 12 is arranged.
  • the function of the control apparatus 20b slightly differs from that of the control apparatus 20a. That is, the control apparatus 20b judges to control the water flow valve 9 for flowing water to the water jacket 10, based on three types of temperatures sensed by the shell temperature detection sensor 6, the water temperature sensor 11, and the ambient air temperature sensor 12. That is, the control apparatus 20b generates a signal for controlling the water flow valve 9, based on the temperatures sensed by the three types of sensors, and outputs it to the water flow valve 9.
  • the control apparatus 20b In addition to the generation of the control signal of Embodiment 1, the control apparatus 20b generates a control signal (a temperature increase rate dependent control signal) described below, and outputs it to the water flow valve 9. That is, when an increase rate per unit time of an ambient air temperature (sensed by the ambient air temperature sensor 12) is faster than that of the shell temperature of the compressor 2 (sensed by the shell temperature detection sensor 6), the control apparatus 20b judges that there is a large amount of accumulation/liquefaction of refrigerant in the compressor 2, generates a control signal indicating to open the water flow valve 9, and outputs it to the water flow valve 9. That is, in such a case, regardless of high or low of the sensed temperature, the increase rate (speed) of each sensed temperature is subject to judgment.
  • a control signal a temperature increase rate dependent control signal
  • the heat pump type hot-water supply outdoor apparatus having higher reliability can be provided.
  • the ambient air temperature sensor 12 is also a sensor originally existing, the above-described effect can be obtained without adding sensors and cost increase caused by adding the sensors.
  • Refrigerant accumulation/liquefaction occurs only when the compressor 2 is in a stopped condition. If the compressor 2 begins to operate in the state where the refrigerant has accumulated and liquefied while the compressor 2 has been stopped (the state where lubricating oil in the compressor has been diluted by the refrigerant), seizure etc. occurs due to poor lubrication of the sliding part of the compressor 2. While the compressor is in a stopped condition, the refrigerant in the refrigerant circuit tends to be collected and condensed as liquid (accumulation/liquefaction) at the portion of the lowest temperature in the refrigerant circuit.
  • the control apparatus 20b firstly compares the temperature variation range per unit time of the ambient air temperature and that of the compressor shell temperature.
  • the control apparatus 20b controls the water flow valve 9 to open.
  • the control apparatus 20b provides control to close the water flow valve 9.
  • Embodiment 1 since the water temperature in the hot water storage tank 30 may be affected (temperature decrease) by letting water flow through the water jacket 10, and since there may a need for increasing output of the circulating pump 40 in order to let water flow through the water jacket 10 (in order to overcome the flow passage resistance), power consumption may increase as the whole system. Then, in such a case, the accuracy of judging whether it is in the state of refrigerant accumulation/liquefaction being likely to occur in the compressor 2 or not can be enhanced by adding the ambient air temperature sensor 12 compared with the case of using the two sensors of the shell temperature detection sensor 6 and the water temperature sensor 11. Thereby, it is possible to inhibit the influence on the water temperature in the hot water storage tank 30, and to inhibit the increase of power consumption of the circulating pump 40.
  • the water flow valve 9 is explained as a stop valve which performs opening or closing. This however describes an example, and the function of the water flow valve 9 may be the one capable of regulating the quantity of water flow in multiple stages.
  • the control apparatus 20a (or the control apparatus 20b) generates and outputs control signals responsive to the multiple stages, based on temperatures sensed by the sensors. The type of a control signal to be generated is programmed in advance.
  • the function of the water flow valve 9 may be the one capable of continuously regulating the quantity of water flow. Also, in that case, the control apparatus 20a (or the control apparatus 20b) generates and outputs a control signal responsive to the continuous regulating, based on temperatures sensed by the sensors. The type of a control signal to be generated is programmed in advance.
  • the heat pump apparatus is explained in Embodiments 1 and 2, it is also acceptable to comprehend the heat pump apparatus as a regulating valve control method by which a control apparatus controls a water flow valve (regulating valve). That is, with regard to a heat pump apparatus provided with a refrigeration cycle including a compressor, a condenser, an expansion valve, and an evaporator, the water jacket 10, the water flow valve 9 connected in the middle of the branch path between the branch at the inlet side and the water jacket and controlled according to an input control signal, the shell temperature detection sensor 6, and the water temperature sensor 11, it is possible to comprehend the heat pump apparatus as a regulating valve control method by which a control apparatus controls the water flow valve 9, based on the temperatures sensed by the shell temperature detection sensor 6 and the water temperature sensor 11.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Claims (5)

  1. Wärmepumpenvorrichtung (1a), umfassend:
    einen Kältekreislauf, der einen Verdichter (2), einen Kondensator (3), ein Expansionsventil (4) und einen Verdampfer (5) aufweist;
    einen Wassermantel (10), der auf einem Gehäuse des Verdichters (2) angeordnet ist und in einer Mitte eines Verzweigungspfades (8) verbunden ist, der sich verzweigt parallel zu einem Hauptkreis, der startend von einem Warmwasserspeichertank (30) zum Kondensator (3) strömt und vom Kondensator (3) zum Warmwasserspeichertank (30) zurückkehrt, und in dem Hauptkreis (7) an einer Verzweigung (A), die sich auf einer Einlassseite des Kondensators (3) befindet, und an einer Verzweigung (B), die sich auf einer Auslassseite des Kondensators (3) befindet, verzweigt, und der aus dem Warmwasserspeichertank (30) herausströmendes Wasser durch den Wassermantel (10) selbst passieren lässt;
    ein Regelventil (9), das in einer Mitte des Verzweigungspfades (8) zwischen der Verzweigung (A) auf der Einlassseite und dem Wassermantel (10) verbunden ist und gemäß einem eingegebenen Steuersignal eine Wasserströmungsmenge regelt;
    gekennzeichnet durch
    einen ersten Temperatursensor (6), der eine Temperatur des Gehäuses des Verdichters (2) erfasst;
    einen zweiten Temperatursensor (11), der stromaufwärts des Regelventils (9) installiert ist und eine Temperatur von Wasser erfasst, das aus dem Warmwasserspeichertank (30) herausströmt; und
    eine Steuervorrichtung (20a), die das Steuersignal zum Steuern des Regelventils (9) erzeugt, basierend auf der durch den ersten Temperatursensor (6) erfassten Temperatur (T6) und der durch den zweiten Temperatursensor (11) erfassten Temperatur (T11), und das erzeugte Steuersignal an das Regelventil (9) ausgibt, wobei, wenn die durch den ersten Temperatursensor (6) erfasste Temperatur (T6) kleiner ist als ein erster eingestellter Wert (T1), und wenn die durch den ersten Temperatursensor (6) erfasste Temperatur (T6) kleiner ist als die durch den zweiten Temperatursensor (11) erfasste Temperatur (T11), die Steuervorrichtung (20a) das Steuersignal zum Steuern des Regelventils (9) erzeugt, um es zu öffnen, um das Gehäuse des Verdichters (2) zu erwärmen; und wenn die durch den ersten Temperatursensor (6) erfasste Temperatur (T6) größer ist als ein zweiter eingestellter Wert (T2), und wenn die durch den ersten Temperatursensor (6) erfasste Temperatur (T6) größer ist als die durch den zweiten Temperatursensor (11) erfasste Temperatur (T11), die Steuervorrichtung (20a) das Steuersignal zum Steuern des Regelventils (9) erzeugt, um es zu öffnen, um das Gehäuse des Verdichters (2) zu kühlen.
  2. Wärmepumpenvorrichtung (1a) nach Anspruch 1,
    wobei der zweite Temperatursensor (11) an einer der Positionen in einem Nähe der Verzweigung (A) an der Einlassseite, in einer Nähe des Verzweigungspfades (8) zwischen der Verzweigung (A) an der Einlassseite und dem Regelventil (9) und in einer Nähe von und stromaufwärts des Regelventils (9) installiert ist.
  3. Wärmepumpenvorrichtung (1b) nach Anspruch 1 oder 2, ferner umfassend
    einen dritten Temperatursensor (12), der eine Temperatur einer Umgebungsluft erfasst,
    wobei die Steuervorrichtung (20b) das Steuersignal erzeugt, basierend auf der durch den ersten Temperatursensor (6) erfassten Temperatur, der durch den zweiten Temperatursensor (11) erfassten Temperatur und der durch den dritten Temperatursensor (12) erfassten Temperatur, und das erzeugte Steuersignal an das Regelventil (9) ausgibt.
  4. Wärmepumpenvorrichtung (1b) nach Anspruch 3,
    wobei die Steuervorrichtung (20b) eine Umgebungslufttemperaturanstiegsrate, die eine Anstiegsrate einer Umgebungslufttemperatur anzeigt, basierend auf der durch den dritten Temperatursensor (12) erfassten Temperatur, und eine Gehäusetemperaturanstiegsrate, die eine Anstiegsrate einer Temperatur des Gehäuses des Verdichters (2) anzeigt, basierend auf der durch den ersten Temperatursensor (6) erfassten Temperatur, berechnet und ein temperaturanstiegsratenabhängiges Steuersignal erzeugt, das ein zweites Steuersignal zum Steuern des Regelventils (9) ist, basierend auf einer Hoch-Niedrig-Beziehung zwischen der Umgebungslufttemperaturanstiegsrate und der Gehäusetemperaturanstiegsrate.
  5. Verfahren zum Steuern eines Regelventils in einer Wärmepumpenvorrichtung mit
    einem Kältekreislauf, der einen Verdichter, einen Kondensator, ein Expansionsventil und einen Verdampfer aufweist;
    einem Wassermantel, der auf einem Gehäuse des Verdichters angeordnet ist und in einer Mitte eines Verzweigungspfades verbunden ist, der parallel zu einem Hauptkreis verzweigt, der startend von einem Warmwasserspeichertank zum Kondensator strömt und vom Kondensator zum Wasserspeichertank zurückführt und in dem Hauptkreis an einer Verzweigung, die sich auf einer Einlassseite des Kondensators befindet, und an einer Verzweigung, die sich auf einer Auslassseite des Kondensators befindet, verzweigt, und der aus dem Warmwasserspeichertank herausströmendes Wasser durch den Wassermantel selbst strömen lässt,
    dem Regelventil, das in einer Mitte des Verzweigungspfades zwischen der Verzweigung auf der Einlassseite und dem Wassermantel verbunden ist, und das, indem es gesteuert wird, eine Wasserströmungsmenge regelt,
    einem ersten Temperatursensor, der eine Temperatur des Gehäuses des Verdichters erfasst, und
    einem zweiten Temperatursensor, der stromaufwärts des Regelventils installiert ist und eine Temperatur des aus dem Warmwasserspeichertank herausströmenden Wassers erfasst,
    wobei das Verfahren umfasst:
    Steuern, durch eine Steuervorrichtung, des Regelventils basierend auf der durch den ersten Temperatursensor erfassten Temperatur (T6) und der durch den zweiten Temperatursensor erfassten Temperatur (T11), wobei, wenn die durch den ersten Temperatursensor erfasste Temperatur (T6) kleiner ist als ein erster eingestellter Wert (T1) und wenn die durch den ersten Temperatursensor erfasste Temperatur (T6) kleiner ist als die durch den zweiten Temperatursensor erfasste Temperatur (T11), die Steuervorrichtung das Regelventil steuert, um es zu öffnen, um das Gehäuse des Verdichters zu erwärmen; und wenn die durch den ersten Temperatursensor erfasste Temperatur (T6) größer ist als ein zweiter eingestellter Wert (T2) und wenn die durch den ersten Temperatursensor erfasste Temperatur (T6) größer ist als die durch den zweiten Temperatursensor erfasste Temperatur (T11), die Steuervorrichtung das Regelventil steuert, um es zu öffnen, um das Gehäuse des Verdichters zu kühlen.
EP09844887.1A 2009-05-18 2009-05-18 Wärmepumpenvorrichtung und verfahren zur steuerung eines regelventils Active EP2434231B1 (de)

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