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公开(公告)号：JPH02195134A
公开(公告)日：1990-08-01
申请号：JP1384789
申请日：1989-01-23
Applicant: MATSUSHITA REFRIGERATION
Inventor： KURACHI MASAO
Abstract: PURPOSE:To make it possible to select freely cooling operation or heating operation by a fourth auxiliary heat exchanger which is integrally formed with a third auxiliary heat exchanger and carries out heat exchange and providing an auxiliary refrigerant cycle which is continuously connected with said fourth auxiliary heat exchanger, an auxiliary compressor, an auxiliary indoor heat exchanger, an auxiliary four way valve, and an auxiliary decompression device in a loop. CONSTITUTION:A refrigerant cycle is separated into a heat side and an application side. To the application side refrigerant cycle are installed a main indoor unit 24 having an application side heat exchanger 23, and a third auxiliary heat exchanger 26. A fourth auxiliary heat exchanger 27 is installed in such a manner that it may be integrally formed with the third auxiliary heat exchanger to carry out heat exchange. Moreover, is provided an auxiliary refrigerant cycle which is continuously connected with the fourth auxiliary heat exchanger, an auxiliary compressor 28, an auxiliary indoor heat exchanger 31, an auxiliary four way valve 29, and an auxiliary decompression device 30 in a loop, which allows the auxiliary refrigerant cycle to perform cooling or heating operation irrespective of the drive of the heat side refrigerant cycle and the application cycle. Therefore, the respective indoor units 24 and 23, even if an outdoor unit f is a single set, are capable of selecting cooling operation or heating operation.
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公开(公告)号：JPH02133728A
公开(公告)日：1990-05-22
申请号：JP28618288
申请日：1988-11-11
Applicant: MATSUSHITA REFRIGERATION
Inventor： TAKAHASHI TAKAHIRO , KURACHI MASAO
Abstract: PURPOSE:To make it possible to minimize a capacity drop due to long piping, carry out more efficient capacity control performance, and reduce the cost of piping work by exchanging heat between a heat source side and a user side refrigerating cycle with an auxiliary heat exchanger and circulating the heat exchanged heat with a refrigerant transfer device. CONSTITUTION:During cooling operation a refrigerant transfer device 21 at a user side refrigerating cycle H is operated and the refrigerant cooled by second auxiliary heat exchangers 19a and 19b which exchange heat with first auxiliary heat exchangers 18a and 18b, is transferred into indoor units 22a and 22b by way of on/off valves 20a and 20b, thereby carrying out cooling operation. On the other hand, during heating operation at the user side refrigerating cycle H, the refrigerant is circulated by the refrigerant transfer device 21 and the refrigerant superheated by the second auxiliary heat exchangers 19a and 19b which exchange heat with the first auxiliary heat exchangers 18a and 18b by way of the on/off valves 20a and 20b, is transferred into the indoor units 22a and 22b, thereby carry out heating operation. In this manner, only a single user side refrigerating cycle is available to a plurality of heat source side refrigerating cycles, which enables capacity control and reduces the number of piping and hence minimize the cost of piping work as well.
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公开(公告)号：JPH02122142A
公开(公告)日：1990-05-09
申请号：JP27490488
申请日：1988-10-31
Applicant: MATSUSHITA REFRIGERATION
Inventor： KURACHI MASAO
Abstract: PURPOSE:To make it possible to perform comfortable airconditioning operation with a minimum fluctuation in room temperature by installing a superheat degree detection device which detects the superheat degree in a heat source side refrigerating cycle and a control device which controls the capacity of the heat source side refrigerating cycle based on a detected superheat degree. CONSTITUTION:A super heat degree detection device 31 which detects the superheat degree of a heat source side refrigerant is mounted in the outlet side of a first auxiliary heat exchanger in a heat source side refrigerating cycle. In the case of cooling operation, when a room where no airconditioning is applied, is subject to a rise in temperature or the number of indoor units operating is subject to an increase, the load of the application side refrigerating cycle will be increased while the superheat degree of refrigerant in the outlet of the first auxiliary heat exchanger 18 will rise; a detection signal in the superheat detection device 31 will vary so that a control device 32 may actuate, thereby increasing the rotary speed of a compressor 11 and improving the capacity of the heat source side refrigerating cycle. In the case of heating operation, the capacity of the heat source side refrigerating cycle is lowered against a rise in the superheat degree of the heat source side refrigerating cycle. Therefore, there is no time lag against drastic fluctuations in indoor load, which makes it possible to perform stabilized operation without halting operation even when it is subject to a high pressure induced by time lag during heating low load.
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公开(公告)号：JPH02122141A
公开(公告)日：1990-05-09
申请号：JP27490388
申请日：1988-10-31
Applicant: MATSUSHITA REFRIGERATION
Inventor： KURACHI MASAO
Abstract: PURPOSE:To make it possible to obtain comfortable airconditioning with a minimum change in room temperature and stabilize operation by installing a superheat degree detection device for refrigerant superheat degree in an application side refrigerating cycle and a control device which controls the capacity of a heat source side refrigerating cycle based on the degree of superheat thus detected. CONSTITUTION:A superheat degree detection device 31 which detects a refrigerant superheat degree on an application side is mounted in the front of a second auxiliary heat exchanger 19 in an application side refrigerating cycle for an outdoor unit f. In the case of cooling operation, when a temperature in a room where no airconditioning is applied rises or the number of indoor units in service is increased, the load of the application side refrigerating cycle will be increased; the degree of superheat of the refrigerant in the front of the second auxiliary heat exchanger 19 will rise; a detection signal in the superheat degree detection device 31 will vary so that a control device 32 may be actuated, thereby increasing a rotary speed of a compressor 11 and improving the capacity of the heat source side refrigerating cycle. In the case of heating operation, an attempt is made to lower the capacity of the heat source side refrigerating cycle in terms of a rise in the application side refrigerating cycle. Therefore, there is no time lag against drastic indoor load fluctuations, which makes it possible to carry out stabilized operation without halting operation even when it is subject to high pressure induced by time lag during heating minimum load.
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公开(公告)号：JPH02122134A
公开(公告)日：1990-05-09
申请号：JP27490188
申请日：1988-10-31
Applicant: MATSUSHITA REFRIGERATION
Inventor： TAKAHASHI TAKAHIRO , KURACHI MASAO
Abstract: PURPOSE:To make it possible to minimize a drop in capacity due to long piping and carry out capacity control operation with efficiency by installing an on/off valve respectively in linear to all plural auxiliary heat exchangers excluding one and linear piping which comprises the second auxiliary heat exchangers and piping for the second auxiliary heat exchangers alone in parallel. CONSTITUTION:During cooling operation for example, high temperature and high pressure gas discharged from compressors 11a and 11b is irradiated and liquefied in heat source side heat exchangers 13a and 13b by way of four way valves 12 and 12b, and decompressed decompression device 16a and 16b for cooling service, passing through check valves 15a and 15b. The decompressed gas is heat adsorbed and vaporized in first auxiliary heat exchangers 18 and 18b, and returned to the compressors 11a and 11b from the four way valves 12a and 12b, thus forming a refrigerating cycle. During this cycle, a refrigerant transfer device 21 for a user side refrigerant cycle H is operated and the refrigerant cooled by second auxiliary heat exchangers 19a and 19b (by way of an on/off valve 20) which heat exchanges with the first heat exchangers 18a and 18b, is transferred into rooms 22a and 22b, thereby carrying out cooling operation. In this manner, the heat source side refrigerant cycle is separated from the user side refrigerating cycle so that the configuration of the heat side refrigerating cycle may not be subjected to any change all the time. It is, therefore, possible to minimize a drop in capacity, even if the length or height of a communication pipe is increased.
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Patent Agency Ranking
公开(公告)号：JPH0244161A
公开(公告)日：1990-02-14
申请号：JP19660088
申请日：1988-08-05
Applicant: MATSUSHITA REFRIGERATION
Inventor： KIMURA TOSHIO , KURACHI MASAO
Abstract: PURPOSE:To simplify piping work and to keep the safety by furnishing an auxiliary refrigerant cycle to a heat pump type refrigeration cycle in such manner that one end of the auxiliary cycle is connected through an auxiliary pressure reducing device to an indoor side heat exchanger connecting pipe that connects an indoor side pressure reducing device and indoor side heat exchanger, and the other end to an outdoor side heat exchanger connecting pipe. CONSTITUTION:During heating operation, the discharged gas from a compressor 21 enters an indoor side heat exchanger 26 in an indoor unit b through a four-way valve 22, is condensed into liquid after releasing heat, flows through a pressure reducing device 25, and evaporates in an outdoor side heat exchanger by absorbing heat, and returns to the compressor 21 through the four-way valve 22 and an accumulator 24. At this time, an auxiliary refrigerant cycle is formed in such a manner that the condensed liquid, that branched from the midst of an indoor side heat exchanger connection pipe 27, enters an auxiliary heat exchanger 29 through an auxiliary pressure reducing device 28 in an auxiliary unit c installed inside a ceiling, evaporates by absorbing heat from air in the ceiling, enters an outdoor heat exchanger connecting pipe 31 through a solenoid valve 30 in open state, and returns to the compressor 21 through the outdoor side heat exchanger 29. Therefore, water is produced in the auxiliary heat exchanger 29, and led to the indoor side heat exchanger 26 so as to make use of it for humidifying a room.
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公开(公告)号：JPH01306798A
公开(公告)日：1989-12-11
申请号：JP13779388
申请日：1988-06-03
Applicant: MATSUSHITA REFRIGERATION
Inventor： KURACHI MASAO
IPC: F28D9/00
Abstract: PURPOSE:To permit refrigerant passages to be formed with a simple technique, by a method wherein the primary side plate of a heat exchanger and the secondary side plate of the same are laminated alternately while seal plates, provided with the inlet port and outlet port of refrigerant for the primary side and the secondary side of the heat exchanger at positions capable of engaging with each other, are inserted between the primary the side plate and the secondary plate. CONSTITUTION:A seal plate 11 is provided with the inlet port 12 of primary side refrigerant, the outlet port 13 of the primary side refrigerant, the inlet port 14 of secondary side refrigerant and the outlet port 15 of the secondary side refrigerant. A primary side plate 16 is provided with the inlet port 14 of the secondary side refrigerant and the outlet port 15 of the same refrigerant, which are engaged with the seal plate 11, and the passage holes 17 of the primary side refrigerant, which are engaged and communicated with the inlet port 13 of the primary side refrigerant and the outlet port 12 of the same refrigerant, while the seal plate 11 is laminated below and above a primary side plate 16 to form the passages of the primary side refrigerant. The seal plate for laminating on a secondary plate 18 and forming the passages of the secondary side refrigerant is used in common.
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公开(公告)号：JPH01225850A
公开(公告)日：1989-09-08
申请号：JP5196288
申请日：1988-03-04
Applicant: MATSUSHITA REFRIGERATION
Inventor： KURACHI MASAO
Abstract: PURPOSE:To control the capacity of a use-side unit, by providing a use-side refrigerant cycle with a pressure detector for detecting the pressure of a refrigerant and with a controller for controlling the capacity of a refrigerant conveyor according to the pressure detected by the pressure detector. CONSTITUTION:A refrigerant conveyor 11 is controlled in capacity by an inverter 13, a pressure detector 14 detects the pressure of a refrigerant in a use-side refrigerant cycle, and a controller 15 controls the frequency of the inverter 13 according to the pressure detected by the detector 14, thereby controlling the capacity of the refrigerant conveyor 11. The conveying capacity of the conveyor 11 is controlled according to a load on a use-side unit (b), and the heat-exchanging capacities of a second auxiliary heat exchanger 9 and a use-side heat exchanger 12 are controlled through controlling the quantity of the refrigerant circulated in the use-side refrigerant cycle, whereby the capacity of the use-side refrigerant cycle is controlled.
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公开(公告)号：JPS6419264A
公开(公告)日：1989-01-23
申请号：JP17327187
申请日：1987-07-10
Applicant: MATSUSHITA REFRIGERATION
Inventor： KURACHI MASAO , TANAKA MASAYUKI
Abstract: PURPOSE: To operate an outdoor unit according to a safer pattern depending on the necessity when a plurality of indoor units perform cooling and heating operations simultaneously by selecting cooling or heating operation among patterns preset based on the outer air temperature, and the room temperature. CONSTITUTION: When indoor units 9a, 9b are performing cooling and heating operations (with a remote controller), respectively, the type of operation detected by detectors 14a, 14b, a temperature difference detected by detectors 15a, 15b and the outer air temperature detected by a detector 7 are fed to a controller 16. If the outer air temperature is higher than a high temperature set level, a decision is made that necessity of cooling is high and cooling operation is performed preferentially and heating indoor units perform air supply operation. If the outer air temperature is lower than a low temperature set level, a decision is made that necessity of heating is high and heating operation is performed preferentially and cooling indoor units perform air supply operation. If the outer air temperature is between both set levels, heating or cooling operation is performed preferentially depending on the room temperature and other indoor units perform air supply operation.
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公开(公告)号：JPS63204084A
公开(公告)日：1988-08-23
申请号：JP3509087
申请日：1987-02-18
Applicant: MATSUSHITA REFRIGERATION
Inventor： TANAKA MASAYUKI , KURACHI MASAO
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