EP3051236A1 - Dispositif à cycle de congélation - Google Patents

Dispositif à cycle de congélation Download PDF

Info

Publication number
EP3051236A1
EP3051236A1 EP14848981.8A EP14848981A EP3051236A1 EP 3051236 A1 EP3051236 A1 EP 3051236A1 EP 14848981 A EP14848981 A EP 14848981A EP 3051236 A1 EP3051236 A1 EP 3051236A1
Authority
EP
European Patent Office
Prior art keywords
refrigeration cycle
degree
opening
refrigerant
expansion valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP14848981.8A
Other languages
German (de)
English (en)
Other versions
EP3051236A4 (fr
EP3051236B1 (fr
Inventor
Ken Miura
Takafumi HATADA
Kaku Okada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Carrier Corp
Original Assignee
Toshiba Carrier Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Carrier Corp filed Critical Toshiba Carrier Corp
Publication of EP3051236A1 publication Critical patent/EP3051236A1/fr
Publication of EP3051236A4 publication Critical patent/EP3051236A4/fr
Application granted granted Critical
Publication of EP3051236B1 publication Critical patent/EP3051236B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • 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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/005—Arrangement or mounting of control or safety devices of safety devices
    • 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
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/06—Details of flow restrictors or expansion valves
    • F25B2341/064—Superheater expansion valves
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/22—Preventing, detecting or repairing leaks of refrigeration fluids
    • F25B2500/222—Detecting refrigerant leaks
    • 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
    • F25B2600/00—Control issues
    • F25B2600/21—Refrigerant outlet evaporator temperature
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2513—Expansion valves

Definitions

  • Embodiments described herein relate generally to a refrigeration cycle apparatus for preventing refrigerant leakage.
  • the refrigerant In a refrigeration cycle in which a refrigerant discharged from a compressor is returned to the compressor through a condenser, a pressure reducing unit and an evaporator, the refrigerant is often leaked from, for example, a connection between pipes through which the refrigerant flows (for example, JP 2008-164265 A ). It is required that the refrigerant leakage be reliably detected.
  • a refrigeration cycle apparatus of the present embodiment aims to detect refrigerant leakage with high reliability and accuracy.
  • the refrigeration cycle apparatus of the present embodiment comprising a refrigeration cycle, an opening control section and a leakage detect section.
  • the leakage detect section predicts a degree of opening of the expansion valve in a case where the refrigerant is not leaked from the refrigeration cycle based on a quantity of change in state of the refrigeration cycle.
  • the leakage detect section detects leakage of the refrigerant in the refrigeration cycle by comparing the predicted degree of opening with an actual degree of opening.
  • an outdoor heat exchanger 3 is connected to a discharge port of a compressor 1 through a four-way valve 2 and a packed valve 5 is connected to the outdoor heat exchanger 3 through an electrically-actuated expansion valve 4 by piping.
  • An indoor heat exchanger 6 is connected to the packed valve 5 and a packed valve 7 is connected to the indoor heat exchanger 6 by piping.
  • a suction port of the compressor 1 is connected to the packed valve 7 through the four-way valve 2 and an accumulator 8 by piping.
  • a heat pump refrigeration cycle is configured by these piping connections.
  • the electrically-actuated expansion valve 4 is a pulse motor valve (PMV) whose degree of opening continuously varies according to the number of input drive pulses.
  • PMV pulse motor valve
  • An outdoor fan 11 is provided near the outdoor heat exchanger 3 and an indoor fan 12 is provided near the indoor heat exchanger 6.
  • the compressor 1 sucks a refrigerant from the suction port, compresses the refrigerant and discharges the refrigerant from the discharge port.
  • the refrigerant discharged from the compressor 1 is sucked into the compressor 1 through the four-way valve 2, the outdoor heat exchanger 3, the electrically-actuated expansion valve 4, the packed valve 5, the indoor heat exchanger 6, the packed valve 7, the four-way valve 2 and the accumulator 8.
  • the outdoor heat exchanger 3 functions as a condenser and the indoor heat exchanger 6 functions as an evaporator.
  • the flow passage of the four-way valve 2 is switched, and the refrigerant discharged from the compressor 1 is sucked into the compressor 1 through the four-way valve 2, the packed valve 7, the indoor heat exchanger 6, the packed valve 5, the electrically-actuated expansion valve 4, the outdoor heat exchanger 3, the four-way valve 2 and the accumulator 8.
  • the indoor heat exchanger 6 functions as a condenser
  • the outdoor heat exchanger 3 functions as an evaporator.
  • a temperature sensor 21 is attached to the outdoor heat exchanger 3.
  • a temperature sensor 22 is attached to a side of the indoor heat exchanger 6 from which the refrigerant flows into the indoor heat exchanger 6 in the case of cooling.
  • a temperature sensor 23 is attached to piping between the four-way valve and the accumulator 8.
  • An outdoor unit A comprises the compressor 1, the four-way valve 2, the outdoor heat exchanger 3, the electrically-actuated expansion valve 4, the packed valve 5, the indoor heat exchanger 6, the packed valve 7, the accumulator 8, the outdoor fan 11, the temperature sensor 21 and the temperature sensor 23.
  • An indoor unit B accommodates the indoor heat exchanger 6, the indoor fan 12 and the temperature sensor 22.
  • a controller 30 is connected to the outdoor unit A and the indoor unit B.
  • a remote control operation unit 31, a manual reset switch 32 and an inverter 40 are connected to the controller 30.
  • the operation unit 31 is used for setting of operating conditions of the air-conditioning apparatus equipped with the refrigeration cycle apparatus.
  • the reset switch 32 is an automatic-reset push-button switch and is provided on a control circuit board for mounting the controller 30.
  • the inverter 40 converts an alternating-current voltage of a commercial alternating-current source 41 into a direct-current voltage by rectification, converts the direct-current voltage into an alternating-current voltage of a predetermined frequency F (Hz) and a level corresponding to the predetermined frequency F by switching, and outputs the alternating-current voltage.
  • the output of the inverter 40 is supplied to a motor in the compressor 1 as driving power.
  • the controller 30 comprises a control section 51, a leakage detect section 52 and an updating section 53 as primary functions, and is equipped with a nonvolatile memory 54 for data storage.
  • the opening control section 51 controls the degree of opening of the electrically-actuated expansion valve 4 such that the degree of superheating SH of the refrigerant in an evaporator is constantly at a target value SHt (superheating constant value control).
  • the evaporator is the indoor heat exchanger 6 in the case of cooling and is the outdoor heat exchanger 3 in the case of heating.
  • the leakage detect section 52 predicts the degree of opening Qm of the electrically-actuated expansion valve 4 in the case where refrigerant leakage does not occur in the heat pump refrigeration cycle based on the quantity of change in state of the heat pump refrigeration cycle, and detects refrigerant leakage in the heat pump refrigeration cycle by comparing the predicted degree of opening Qm with an actual degree of opening Qa of the electrically-actuated expansion valve 4.
  • the leakage detect section 52 stores the degree of opening Qx of the electrically-actuated expansion valve 4 at the beginning of operation of the heat pump refrigeration cycle in the memory 54, and a state quantity of the heat pump refrigeration cycle at the beginning of operation in the memory 54 as an initial state quantity (also referred to as an initial operation state quantity).
  • the leakage detect section 52 detects the difference between the stored initial state quantity and a state quantity at the current stage of operation of the heat pump refrigeration cycle (also referred to as a current state quantity) as the quantity of change in state. Based on the detected quantity of change in state, the leakage detect section 52 predicts (estimates) the degree of opening Qm of the electrically-actuated expansion valve 4 in the case where refrigerant leakage does not occur in the heat pump refrigeration cycle. Then, the leakage detect section 52 detects refrigerant leakage in the heat pump refrigeration cycle based on the difference between the predicted degree of opening Qm and an actual degree of opening Qa of the electrically-actuated expansion valve 4.
  • the predicted degree of opening Qm is hereinafter referred to as the predicted degree of opening (or estimated degree of opening) Qm.
  • the predicted degree of opening Qm is the degree of opening that the electrically-actuated expansion valve 4 should attain to at the current stage of operation of the heat pump refrigeration cycle on the premise that refrigerant leakage does not occur in the heat pump refrigeration cycle.
  • the initial state quantity is at least one of an operating frequency Fx, a condensation temperature Tcx, an evaporation temperature Tex and the degree of superheating SHx at the moment when set time tx (for example, 10 to 50 hours) has passed since the reset switch 32 was operated.
  • the operating frequency Fx is an operating frequency of the compressor 1 (output frequency of the inverter 40).
  • the condensation temperature Tcx is the sensed temperature T1 of the temperature sensor 21 attached to the outdoor heat exchanger 3 in the case of cooling, and is the sensed temperature T2 of the temperature sensor 22 attached to the indoor heat exchanger 6 in the case of heating.
  • the evaporation temperature Tex is the sensed temperature T2 of the temperature sensor 22 attached to the indoor heat exchanger 6 in the case of cooling, and is the sensed temperature T1 of the temperature sensor 21 attached to the outdoor heat exchanger 3 in the case of heating.
  • the state quantity at the current stage of operation of the heat pump refrigeration cycle is at least one of an operating frequency Fa, a condensation temperature Tca, an evaporation temperature Tea and the degree of superheating SHa at the current stage of operation of the heat pump refrigeration cycle.
  • the leakage detect section 52 when the leakage detect section 52 stores the operating frequency Fx, the condensation temperature Tcx, the evaporation temperature Tex and the degree of superheating SHx as the initial state quantity, the leakage detect section 52 extracts the operating frequency Fa, the condensation temperature Tca, the evaporation temperature Tea and the degree of superheating SHa as the current state quantity. For example, when the leakage detect section 52 stores the operating frequency Fx, the condensation temperature Tcx and the evaporation temperature Tex as the initial state quantity, the leakage detect section 52 extracts the operating frequency Fa, the condensation temperature Tca and the evaporation temperature Tea as the current state quantity.
  • the leakage detect section 52 when the leakage detect section 52 stores the operating frequency Fx and the condensation temperature Tcx as the initial state quantity, the leakage detect section 52 extracts the operating frequency Fa and the condensation temperature Tca as the current state quantity. For example, when the leakage detect section 52 stores the operating frequency Fx as the initial state quantity, the leakage detect section 52 extracts the operating frequency Fa as the current state quantity.
  • the updating section 53 updates the initial state quantity in the memory 54 in response to tuning on of the reset switch 32.
  • control executed by the controller 30 is described with reference to a flowchart of FIG. 2 .
  • the controller 30 determines whether an initial state flag f is "0" (step 101).
  • the initial state flag f indicates whether the degree of opening Qx and the initial state quantity have already been stored.
  • the controller 30 resets the initial state flag f to "0" when the reset switch 32 is turned on by a user or worker.
  • the controller 30 determines that the degree of opening Qx and the initial state quantity are not yet stored, accumulates operating time t (step 102) and determines whether the accumulated operating time t is greater than or equal to the set time tx (t ⁇ tx) (step 103).
  • the accumulated operating time t is successively stored in the memory 54 of the controller 30 for update.
  • the controller 30 zeros the accumulated operating time t.
  • the set time tx is a value from 10 to 50 hours, which is the beginning of operation. A suitable value is selected as the set time tx depending on an environment in which the refrigeration cycle apparatus is installed, etc.
  • the controller 30 When the accumulated operating time t is less than the set time tx (NO in step 103), the controller 30 returns to the flag determination in step 101.
  • the controller 30 determines whether the heat pump refrigeration cycle is in a stable operating state (steps 104, 105 and 106).
  • step 104 the controller 30 determines whether an absolute value (
  • the set value ⁇ SHs is, for example, 2 to 3 K.
  • step 105 the controller 30 determines whether the degree of superheating SHa at the current stage of operation of the heat pump refrigeration cycle is greater than or equal to a set value SHs (SHa ⁇ SHs).
  • the set value SHs is, for example, 1 to 2 K.
  • the controller 30 determines whether the operating frequency Fa of the compressor 1 at the current stage of operation of the heat pump refrigeration cycle is greater than or equal to a set value Fs (Fa ⁇ Fs).
  • the set value Fs is, for example, 30 Hz.
  • step 104 When at least one of the determination results of steps 104, 105 and 106 is no (NO in step 104, NO in step 105 or NO in step 106), the controller 30 returns to the flag determination in step 101.
  • step 104 determines that the heat pump refrigeration cycle is brought into the stable operating state, stores the degree of opening Qx of the electrically-actuated expansion valve 4 at that time in memory 54 for update, and stores the operating frequency Fx, the condensation temperature Tcx, the evaporation temperature Tex and the degree of superheating SHx as the initial state quantity in the memory 54 for update (step 107).
  • the controller 30 sets the initial state flag f to "1" (step 108) and returns to the flag determination in step 101.
  • the controller 30 determines whether the heat pump refrigeration cycle is in the stable operating state (steps 109, 110 and 111).
  • step 109 the controller 30 determines whether an absolute value (
  • the set value ⁇ SHs is, for example, 2 to 3 K.
  • step 110 the controller 30 determines whether the degree of superheating SHa at the current stage of operation of the heat pump refrigeration cycle is greater than or equal to a set value SHs (SHa ⁇ SHs).
  • the set value SHs is, for example, 1 to 2 K.
  • the controller 30 determines whether the operating frequency Fa of the compressor 1 at the current stage of operation of the heat pump refrigeration cycle is greater than or equal to a set value Fs (Fa ⁇ Fs).
  • the set value Fs is, for example, 30 Hz.
  • step 109, 110 and 111 When at least one of the determination results of steps 109, 110 and 111 is no (NO in step 109, NO in step 110 or NO in step 111), the controller 30 returns to the flag determination in step 101.
  • step 109, YES in step 110 and YES in step 111 the controller 30 determines that the heat pump refrigeration cycle is brought into the stable operating state, and detects the difference between the state quantity at the current stage of operation of the heat pump refrigeration cycle and the initial state quantity in the memory 54 as the quantity of change in state (step 112).
  • the state quantity at the current stage of operation of the heat pump refrigeration cycle is the operating frequency Fa, the condensation temperature Tca, the evaporation temperature Tea and the degree of superheating SHa.
  • the quantity of change in state is the difference ⁇ F between the operating frequency Fx and the operating frequency Fa, the difference ⁇ Tc between the condensation temperature Tcx and the condensation temperature Tca, the difference ⁇ Te between the evaporation temperature Tex and the evaporation temperature Tea, and the difference ⁇ SHxa between the degree of superheating SHx and the degree of superheating SHa.
  • the controller 30 predicts the degree of opening Qm of the electrically-actuated expansion valve 4 in the case where the heat pump refrigeration cycle stably operates without refrigerant leakage, based on the detected quantity of change in state (step 113).
  • the prediction is hereinafter described.
  • factors that determine the degree of opening Q of the electrically-actuated expansion valve 4 include "degree of dryness”, “refrigerant circulating amount”, “evaporation temperature Te” and “condensation temperature Tc".
  • the degree of dryness is a weight ratio between a saturated liquid and vapor (dry saturated vapor) in the case where the refrigerant is wet saturated vapor.
  • Q L ⁇ ⁇ / ⁇ P ⁇ 0.5
  • L the refrigerant circulating amount
  • ⁇ the refrigerant density on the refrigerant inlet side of the electrically-actuated expansion valve 4
  • ⁇ P is hereinafter referred to as the refrigerant pressure difference.
  • the factors except the refrigerant density p i.e., the refrigerant circulating amount L and the refrigerant pressure difference ⁇ P can be obtained by an operation using the operating frequency F, the condensation temperature Tc, the evaporation temperature Te and the degree of superheating SH.
  • the refrigerant density ⁇ can be obtained by correcting the degree of opening Q by using the operating frequency F, the condensation temperature Tc, the evaporation temperature Te and the degree of superheating SH.
  • the amount of change in the refrigerant density ⁇ is also the amount of change in the refrigerant in the heat pump refrigeration cycle. That is, whether refrigerant leakage occurs can be determined based on the amount of change in the refrigerant density p.
  • the parameters for the above operation i.e., the operating frequency F, the condensation temperature Tc, the evaporation temperature Te and the degree of superheating SH, are not significantly affected by the reduction in the refrigerant amount.
  • the degree of opening Qm of the electrically-actuated expansion valve 4 in the case where refrigerant leakage does not occur in the heat pump refrigeration cycle can be predicted (estimated) by the following operational expression of correcting the degree of opening Qx stored in the memory 54 at the beginning of operation by the quantity of change in state from the beginning of operation to the current stage of operation, i.e., ⁇ F, ⁇ Tc, ⁇ Te and ⁇ SHxa.
  • the predicted degree of opening Qm is a proper degree of opening that the electrically-actuated expansion valve 4 should attain to at the current stage of operation on the premise that refrigerant leakage does not occur in the heat pump refrigeration cycle.
  • the electrically-actuated expansion valve 4 is adjusted to the degree of opening greater than the predicted degree of opening Qm by the superheating constant value control by the controller 30.
  • the controller 30 successively recognizes the actual degree of opening Qa of the electrically-actuated expansion valve 4.
  • the controller 30 determines whether the obtained discrepancy amount ⁇ Q is greater than or equal to a threshold value ⁇ Qs (step 115).
  • the threshold value ⁇ Qs is the degree of opening corresponding to, for example, 100 to 200 drive pulses.
  • a suitable value is selected as the threshold value ⁇ Qs depending on the capacity of devices constituting the heat pump refrigeration cycle and the length of piping.
  • the controller 30 determines that refrigerant leakage occurs in the heat pump refrigeration cycle, and notifies the user of that effect by, for example, display of characters or an icon image on the operation unit 31 (step 116). The user can understand that the refrigerant leakage occurs by the notification and request maintenance or inspection.
  • the controller 30 deactivates the compressor 1 and prevents the compressor 1 from operating (step 117). Since the compressor 1 is prevented from operating, the compressor 1 does not operate while the refrigerant leaks, and the adverse effect on the refrigeration cycle device can be avoided.
  • the discrepancy amount ⁇ Q is obtained by experimenting using the amount of refrigerant leakage as a parameter and is plotted in FIG. 4 .
  • Qa_max is the maximum degree of Qa_max is the maximum degree of opening of the electrically-actuated expansion valve 4.
  • the discrepancy amount ⁇ Q is 0 (%).
  • the discrepancy amount ⁇ Q 10 (%) corresponds to 50 pulses.
  • whether refrigerant leakage occurs in the heat pump refrigeration cycle can be reliably determined regardless of the length of piping in the heat pump refrigeration cycle and the difference in specification between the air-conditioning apparatuses equipped with the refrigeration cycle apparatus, by predicting the degree of opening Qm of the electrically-actuated expansion valve 4 in the case where refrigerant leakage does not occur based on the quantity of change in state of the heat pump refrigeration cycle, and detecting refrigerant leakage by comparing the predicted degree of opening Qm with the actual degree of opening Qa.
  • the degree of opening Qm can be predicted with high accuracy.
  • the threshold value ⁇ Qs for leakage detection can be set to a low value. Since the threshold value ⁇ Qs for leakage detection can be set to a low value, refrigerant leakage can be accurately detected even if the amount of refrigerant leakage is small.
  • the user or worker turns on the reset switch 32 after the relocation.
  • the controller 30 stores the degree of opening Qx and an initial state quantity of new operation in the memory 54 for update. By the update, whether refrigerant leakage occurs can be reliably detected after the relocation.
  • a plurality of conditions i.e., a condition that an absolute value ⁇ SH of the difference between the degree of superheating SHa and the target value SHt is less than the value ⁇ SHs, and a condition that the degree of superheating SHa is greater than or equal to the set value SHs (degree of superheating SH is a positive value), are used. Therefore, refrigerant leakage can be detected without absorption of liquid refrigerant into the compressor 1 and operating delay of the electrically-actuated expansion valve 4. That is, the detection accuracy is improved.
  • the liquid refrigerant is often accumulated in the outdoor heat exchanger 3 when the operating frequency F is low.
  • refrigerant leakage can be detected without accumulation of the liquid refrigerant in the outdoor heat exchanger 3 because a condition that the operating frequency Fa is greater than or equal to the set value Fs is further added as a factor that determines whether the heat pump refrigeration cycle is in the stable operating state. In this point, too, the detection accuracy is improved.
  • ⁇ ⁇ SHs" in steps 104 and 109 is used as a factor that determines whether the heat pump refrigeration cycle is in the stable operating state, but a condition of steps 104a and 109a shown in FIG. 5 may be used instead.
  • the controller 30 determines this condition as one of factors of the stable operating state.
  • the controller 30 determines this condition as one of factors of the stable operating state.
  • the set value ⁇ Qas is the degree of opening corresponding to, for example, 3 to 5 drive pulses.
  • a suitable value is determined as the set value ⁇ Qas depending on the capacity of refrigeration cycle device and the length of piping.
  • the certain period ty is, for example, 3 to 5 minutes.
  • a suitable value is determined as the certain period ty depending on the capacity of refrigeration cycle device and the length of piping.
  • ⁇ F, ⁇ Tc, ⁇ Te and ⁇ SHxa are used as the quantity of change in state in the above-described embodiment, but only ⁇ F and ⁇ Tc may be used as the quantity of change in state. At least one of ⁇ F, ⁇ Tc, ⁇ Te and ⁇ SHxa may be used as the quantity of change in state.
  • the manual reset switch 32 is provided as a means for updating the stored degree of opening Qx and the stored initial state quantity, but this means may be provided in the operation unit 31.
  • the degree of opening Qx and the initial state quantity may be automatically updated. That is, after the controller 30 executes the refrigerant recovery operation for relocation of the refrigeration cycle apparatus, the controller 30 automatically updates the stored degree of opening Qx and the stored initial state quantity.
  • the refrigeration cycle apparatus is installed in the air-conditioning apparatus, but the embodiment can also be applied to a refrigeration cycle apparatus installed in other apparatuses such as a boiler.
  • the refrigeration cycle apparatus of the present embodiment can be applied to an air-conditioning apparatus.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)
  • Examining Or Testing Airtightness (AREA)
EP14848981.8A 2013-09-27 2014-09-19 Dispositif à cycle de congélation Active EP3051236B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013200762 2013-09-27
PCT/JP2014/074874 WO2015046066A1 (fr) 2013-09-27 2014-09-19 Dispositif à cycle de congélation

Publications (3)

Publication Number Publication Date
EP3051236A1 true EP3051236A1 (fr) 2016-08-03
EP3051236A4 EP3051236A4 (fr) 2017-06-07
EP3051236B1 EP3051236B1 (fr) 2018-10-17

Family

ID=52743203

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14848981.8A Active EP3051236B1 (fr) 2013-09-27 2014-09-19 Dispositif à cycle de congélation

Country Status (4)

Country Link
EP (1) EP3051236B1 (fr)
JP (1) JP6130921B2 (fr)
TR (1) TR201819850T4 (fr)
WO (1) WO2015046066A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11131471B1 (en) 2020-06-08 2021-09-28 Emerson Climate Technologies, Inc. Refrigeration leak detection
US20210404718A1 (en) * 2020-06-30 2021-12-30 Thermo King Corporation Systems and methods for transport climate control circuit management and isolation
US11359846B2 (en) 2020-07-06 2022-06-14 Emerson Climate Technologies, Inc. Refrigeration system leak detection
US11609032B2 (en) 2020-10-22 2023-03-21 Emerson Climate Technologies, Inc. Refrigerant leak sensor measurement adjustment systems and methods
US11754324B2 (en) 2020-09-14 2023-09-12 Copeland Lp Refrigerant isolation using a reversing valve
US11885516B2 (en) 2020-08-07 2024-01-30 Copeland Lp Refrigeration leak detection
US11940188B2 (en) 2021-03-23 2024-03-26 Copeland Lp Hybrid heat-pump system
US12013139B2 (en) 2018-09-27 2024-06-18 Daikin Industries, Ltd. Air conditioning apparatus, management device, and connection pipe

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6304330B2 (ja) * 2016-09-02 2018-04-04 ダイキン工業株式会社 冷凍装置
JP6636192B2 (ja) * 2019-01-24 2020-01-29 三菱電機株式会社 異常検知システム、冷凍サイクル装置、及び異常検知方法

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06273013A (ja) * 1993-03-19 1994-09-30 Toshiba Corp 空気調和装置
JPH06281266A (ja) * 1993-03-29 1994-10-07 Sanyo Electric Co Ltd エアコン
JPH0821675A (ja) * 1994-07-06 1996-01-23 Hitachi Ltd 空気調和機およびその冷媒量判定方法
JP4432753B2 (ja) * 2004-07-08 2010-03-17 三菱電機株式会社 アダプタ、ネットワークシステム
EP1970651B1 (fr) * 2006-09-21 2019-07-31 Mitsubishi Electric Corporation Système de réfrigération/de climatisation de l'air ayant une function de détection de fuite de réfrigérant, réfrigérateur/climatiseur d'air et procédé de détection d'une fuite de réfrigérant
JP4317878B2 (ja) 2007-01-05 2009-08-19 日立アプライアンス株式会社 空気調和機及びその冷媒量判定方法
JP4588728B2 (ja) * 2007-02-15 2010-12-01 三菱電機株式会社 空気調和装置
JP4749369B2 (ja) * 2007-03-30 2011-08-17 三菱電機株式会社 冷凍サイクル装置の故障診断装置及びそれを搭載した冷凍サイクル装置
JP2009079842A (ja) * 2007-09-26 2009-04-16 Mitsubishi Electric Corp 冷凍サイクル装置およびその制御方法
JP4926098B2 (ja) * 2008-03-14 2012-05-09 三菱電機株式会社 冷凍装置
JP4864110B2 (ja) * 2009-03-25 2012-02-01 三菱電機株式会社 冷凍空調装置
JP5487831B2 (ja) * 2009-09-15 2014-05-14 ダイキン工業株式会社 漏洩診断方法、及び漏洩診断装置
JP5147889B2 (ja) * 2010-04-12 2013-02-20 三菱電機株式会社 空気調和装置
JP2012202672A (ja) * 2011-03-28 2012-10-22 Mitsubishi Heavy Ind Ltd 膨張弁制御装置、熱源機、及び膨張弁制御方法

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12013139B2 (en) 2018-09-27 2024-06-18 Daikin Industries, Ltd. Air conditioning apparatus, management device, and connection pipe
US11131471B1 (en) 2020-06-08 2021-09-28 Emerson Climate Technologies, Inc. Refrigeration leak detection
US11713893B2 (en) 2020-06-08 2023-08-01 Emerson Climate Technologies, Inc. Refrigeration leak detection
US11732916B2 (en) 2020-06-08 2023-08-22 Emerson Climate Technologies, Inc. Refrigeration leak detection
US20210404718A1 (en) * 2020-06-30 2021-12-30 Thermo King Corporation Systems and methods for transport climate control circuit management and isolation
US11674726B2 (en) * 2020-06-30 2023-06-13 Thermo King Llc Systems and methods for transport climate control circuit management and isolation
US11359846B2 (en) 2020-07-06 2022-06-14 Emerson Climate Technologies, Inc. Refrigeration system leak detection
US11885516B2 (en) 2020-08-07 2024-01-30 Copeland Lp Refrigeration leak detection
US11754324B2 (en) 2020-09-14 2023-09-12 Copeland Lp Refrigerant isolation using a reversing valve
US11609032B2 (en) 2020-10-22 2023-03-21 Emerson Climate Technologies, Inc. Refrigerant leak sensor measurement adjustment systems and methods
US11940188B2 (en) 2021-03-23 2024-03-26 Copeland Lp Hybrid heat-pump system

Also Published As

Publication number Publication date
JP6130921B2 (ja) 2017-05-17
EP3051236A4 (fr) 2017-06-07
EP3051236B1 (fr) 2018-10-17
TR201819850T4 (tr) 2019-01-21
WO2015046066A1 (fr) 2015-04-02
JPWO2015046066A1 (ja) 2017-03-09

Similar Documents

Publication Publication Date Title
EP3051236B1 (fr) Dispositif à cycle de congélation
JP6440667B2 (ja) 冷凍サイクル装置
CN104990294B (zh) 空调器及其控制方法、控制装置
US20110088414A1 (en) Air conditioning apparatus refrigerant quantity determination method and air conditioning apparatus
JP6387276B2 (ja) 冷凍サイクル装置
US10533783B2 (en) Air conditioner having compressor bypass and evaluation of volume of connecting pipe
EP2679936A1 (fr) Détection de défaut et diagnostic d'un réfrigérateur d'un capteur de compresseur
JP2016090177A (ja) 冷凍サイクル装置
JP6628833B2 (ja) 冷凍サイクル装置
GB2528213A (en) Heat pump device and air-conditioning system
CN110836519B (zh) 一种空调器冷媒泄漏检测方法及检测系统
JP5981396B2 (ja) ヒートポンプ熱源機
JP2008298335A (ja) 冷凍装置および同冷凍装置に用いられる冷媒追加充填キット並びに冷凍装置の冷媒追加充填方法
EP3086060A1 (fr) Procédé et appareil de dégivrage pour appareil frigorifique ou climatiseur
JP6964755B2 (ja) 空気調和装置
CN116209964B (zh) 信息处理装置、信息处理方法及程序产品
JP2016065699A (ja) 冷凍サイクル装置
WO2022249502A1 (fr) Dispositif de réfrigération et de climatisation
EP3943824B1 (fr) Système d'évaluation de dispositif et procédé d'évaluation de dispositif
US12007153B2 (en) Refrigeration cycle apparatus
CN108954714B (zh) 空调器的启动控制方法和空调器
CN115917223A (zh) 制冷循环系统

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20160323

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAX Request for extension of the european patent (deleted)
A4 Supplementary search report drawn up and despatched

Effective date: 20170509

RIC1 Information provided on ipc code assigned before grant

Ipc: F25B 13/00 20060101ALN20170502BHEP

Ipc: F25B 49/00 20060101ALI20170502BHEP

Ipc: F25B 49/02 20060101AFI20170502BHEP

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

RIC1 Information provided on ipc code assigned before grant

Ipc: F25B 49/02 20060101AFI20180410BHEP

Ipc: F25B 49/00 20060101ALI20180410BHEP

Ipc: F25B 13/00 20060101ALN20180410BHEP

INTG Intention to grant announced

Effective date: 20180508

RIC1 Information provided on ipc code assigned before grant

Ipc: F25B 49/00 20060101ALI20180424BHEP

Ipc: F25B 49/02 20060101AFI20180424BHEP

Ipc: F25B 13/00 20060101ALN20180424BHEP

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602014034420

Country of ref document: DE

Ref country code: AT

Ref legal event code: REF

Ref document number: 1054538

Country of ref document: AT

Kind code of ref document: T

Effective date: 20181115

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20181017

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1054538

Country of ref document: AT

Kind code of ref document: T

Effective date: 20181017

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181017

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181017

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181017

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181017

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190217

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190117

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181017

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190117

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181017

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181017

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181017

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190118

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190217

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181017

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181017

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181017

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602014034420

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181017

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181017

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181017

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181017

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181017

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181017

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181017

26N No opposition filed

Effective date: 20190718

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181017

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602014034420

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181017

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190919

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190919

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190930

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190930

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200401

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20190930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181017

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181017

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20140919

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181017

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: TR

Payment date: 20230918

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20240701

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20240702

Year of fee payment: 11