公开(公告)号：JPH0611205A

公开(公告)日：1994-01-21

申请号：JP16731892

申请日：1992-06-25

Applicant: MATSUSHITA REFRIGERATION

Inventor： NAKAGAWA NOBUHIRO ,  KURACHI MASAO ,  MARUMOTO KAZUHIKO

IPC: F25B13/00

Abstract: PURPOSE:To obtain an air conditioning apparatus where gas injection can be used without spoiling the reliability of a compressor even when the outdoor load fluctuates during air conditioning operation. CONSTITUTION:An air conditioning apparatus is provided with an outside temperature detector 21 which detects the outside temperatures, an intermediate pressure detector 22 which detects the intermediate pressure of a gas-liquid separator 14, an air conditioning mode judging device 24 which judges cooling or heating operation mode, a set intermediate pressure arithmetic device 25 which does arithmetic of set intermediate pressure based on the outside temperatures. In addition, an intermediate pressure judging device 26 which compares the arithmetic result with the intermediate pressure to judge, a pressure reducing amount decision device 27 which decides the pressure reducing amount of a pressure reducing device 15 for air conditioning corresponding to the judgment result, and a pressure reducing device driver 28 which drives the pressure reducing device 15 for air conditioning corresponding to the pressure reducing amount are provided.

公开(公告)号：JPH05332595A

公开(公告)日：1993-12-14

申请号：JP14403992

申请日：1992-06-04

Applicant: MATSUSHITA REFRIGERATION

Inventor： NISHIO YASUNORI ,  KURACHI MASAO

IPC: F24F11/02 ,  F25B1/00 ,  F25B13/00

Abstract: PURPOSE:To realize comfortable environment inside rooms and energy saving by a method wherein the valve travels of outdoor flow valves are mode larger than the set ones when two or more outdoor units are started or stopped. CONSTITUTION:An outdoor unit capacity judgement means 16 decides the capacity distribution of two or more outdoor units f and f' against changes in load on two or more indoor units g and g'. When the two or more outdoor units f and f' are started, an outdoor flow valve means 17 and a compressor means 18 receive signals from the outdoor unit capacity judgement means 16, and the valve travels of outdoor flow valves 11a and 11b are made larger than the set ones. When the two or more outdoor units are stopped, the valve travels of the flow valves are also made larger. Thereby, a decline in capacity caused by a sharp fluctuation in capacity can be prevented and a decline in reliability of devices due to hunching phenomena is prevented.

公开(公告)号：JPH05126424A

公开(公告)日：1993-05-21

申请号：JP29117191

申请日：1991-11-07

Applicant: MATSUSHITA REFRIGERATION

Inventor： YAMAMOTO MUNEHIRO ,  KURACHI MASAO

IPC: F24F5/00 ,  F25B1/00 ,  F25B13/00

Abstract: PURPOSE:To eliminate a heat-releasing heat exchanger from the use in a heat storage tank so as to reduce the refrigerant in a user side refrigerant cycle in quantity and prevent liquefied refrigerant from staying stagnant in the heat- releasing heat exchanger and also prevent damage to a refrigerant-conveying device caused by an influx of liquid into it. CONSTITUTION:In a user side refrigerant cycle a first heat-releasing auxiliary heat exchanger 30 is provided in parallel with a second auxiliary heat exchanger 19. This first heat-releasing auxiliary heat exchanger 30 is joined in one structure to a second heat-releasing auxiliary heat exchanger 31 for the heat exchange between the two. A heat-releasing circuit 33 is formed in a loop by connecting therein the second heat-releasing auxiliary heat exchanger 31, a heat-storing material conveyance device 32, and a heat storage tank 23 containing a heat-storing heat exchanger 24.

公开(公告)号：JPH05118690A

公开(公告)日：1993-05-14

申请号：JP28105191

申请日：1991-10-28

Applicant: MATSUSHITA REFRIGERATION

Inventor： KURACHI MASAO

IPC: F25B1/00 ,  F25B13/00

Abstract: PURPOSE:To obtain a multi-chamber cooling and heating device, capable of eliminating a heat dissipating heat exchanger in a heat accumulating tank, reducing the amount of refrigerant in an utilizing side refrigerant cycle, preventing the stagnation of liquefied refrigerant in the heat dissipating heat exchanger and preventing the damage of a refrigerant transporting device due to the inflow of liquid into the refrigerant transporting device. CONSTITUTION:A heat dissipating first auxiliary heat exchanger 30 is provided in an utilizing side refrigerant cycle in parallel to a second auxiliary heat exchanger. The title device is provided with a heat dissipating second auxiliary heat exchanger 31, formed integrally with the heat dissipating first auxiliary heat exchanger 30 to effect heat exchange, and a heat dissipating circuit, in which the heat dissipating second auxiliary heat exchanger 31, a heat accumulating material transporting device 32 and a heat accumulating tank having a heat accumulating heat exchanger 24 are connected annularly.

公开(公告)号：JPH0571814A

公开(公告)日：1993-03-23

申请号：JP23282291

申请日：1991-09-12

Applicant: MATSUSHITA REFRIGERATION

Inventor： TAKAHASHI TAKAHIRO ,  NAKAGAWA NOBUHIRO ,  KURACHI MASAO

IPC: F24F5/00 ,  F25B1/00

Abstract: PURPOSE:To obtain a heating and cooling apparatus preventing a short circuit in a use-side four-way valve when the next heating operation is started and the stoppage of a system by high pressure cutting by positively turning the pilot type use-side four-way valve OFF when heating operation is stopped. CONSTITUTION:Stoppage from heating operation is detected by a heating-cooling stoppage detecting means, and pressure difference on the delivery side and suction side of a refrigerant pump 8 is detected by a differential-pressure detecting means 26. When whether or not pressure difference reaches the proof differential pressure or more of a use-side four-way valve 9 is decided by a differential-pressure decision means 27 and the pressure difference is lower than the proof differential pressure, an indoor flow valve 22 is driven by an indoor flow-valve driving means 28 as the operation of the refrigerant pump 8 is left as it is continued until the pressure difference is made lower. A compressor 1 and a heat-source side four-way valve 2 are driven by a heat-source side equipment driving means 18 and the use-side four-way valve 9 and the refrigerant pump 8 by a use-side equipment driving means, thus stopping a system.

公开(公告)号：JPH055570A

公开(公告)日：1993-01-14

申请号：JP15299791

申请日：1991-06-25

Applicant: MATSUSHITA REFRIGERATION

Inventor： YANO KENICHIRO ,  KURACHI MASAO

IPC: F25B1/00 ,  F25B13/00

Abstract: PURPOSE:To always stabilize a system and to efficiently operate it by suitably branching refrigerant to a plurality of outdoor units. CONSTITUTION:A refrigerant conveyor 21 of a user side refrigerant cycle, a gas/liquid separation header 23 provided between outdoor units (f) and f', gas flow valves 24a, 24b communicating with an upper part of the header 23, liquid flow valves 25a, 25b communicating with a lower part of the header 23, and a second auxiliary heat exchanger 19 are annularly connected.

公开(公告)号：JPH04268148A

公开(公告)日：1992-09-24

申请号：JP2730591

申请日：1991-02-21

Applicant: MATSUSHITA REFRIGERATION

Inventor： KURACHI MASAO ,  MARUMOTO KAZUHIKO

IPC: F24F11/02 ,  F25B13/00

Abstract: PURPOSE:To provide a cooling and a heating device in which its cycle is separated into a heat source side refrigerant cycle and a user's side refrigerant cycle and an outdoor device is positioned at a higher location than an indoor device, wherein only gaseous refrigerant is absorbed into a refrigerant pump when a heating operation is started and lubrication within the refrigerant pump is prevented from being deteriorated and an operation of a system is prevented from being troubled. CONSTITUTION:When a heating command from a remote controller 14 is detected by a cooling or a heating mode sensing means 19 and a stopping command for an outdoor device 10 from the remote controller 14 is detected by an outdoor device starting or stopping sensing means 20, an operation of the outdoor device 10 is continued under a cooling mode with an equipment driving means 21 until a predetermined time elapses under an operation of a predetermined time sensing means 23 and liquid refrigerant is stored in a liquid refrigerant tank 22 disposed at an upstream side of a refrigerant pump 8.

公开(公告)号：JPH04190034A

公开(公告)日：1992-07-08

申请号：JP32357990

申请日：1990-11-26

Applicant: MATSUSHITA REFRIGERATION

Inventor： HIROSE KENJI ,  KURACHI MASAO

IPC: F24F11/02

Abstract: PURPOSE:To restrict liquid refrigerant from flowing into a refrigerant pump by a method wherein a pressure difference between an inlet port and an outlet port of a refrigerant pump is detected and the third solenoid valve is controlled under a cooling operation and the second solenoid valve is controlled under a heating operation. CONSTITUTION:A control device 18 calculates a pressure difference between detected values of pressure sensors 16 and 17 disposed at an inlet port and an outlet port of a refrigerant pump 10 and controls the first to fourth solenoid valves 11, 12, 13 and 14. As the pump 10 starts to compress liquid, the pressure difference between the inlet port and the outlet port is rapidly increased. For example, during a cooling operation, and if the pump 10 compresses liquid, the solenoid valve 11 is opened, the solenoid valve 13 is opened or closed repeatedly and then the solenoid valve 12 and the solenoid valve 14 are closed. Refrigerant flow passes from the pump 10 through the solenoid valve 11 and the second auxiliary heat exchanger 7 and reaches the solenoid valve 13. The solenoid valve 13 repeats the opening or closing operation, so that the large amount of liquid is hardly flowed in. During a heating operation, a flow of refrigerant is reversed and the device 18 controls the solenoid valve 13 during a cooling operation and in turn during a heating operation it controls the solenoid valve 12, thereby it is possible to restrict the liquid refrigerant flowing into the pump 10.

公开(公告)号：JPH04177033A

公开(公告)日：1992-06-24

申请号：JP30436690

申请日：1990-11-08

Applicant: MATSUSHITA REFRIGERATION

Inventor： MARUMOTO KAZUHIKO ,  KURACHI MASAO

IPC: F24F5/00

Abstract: PURPOSE:To reduce resistance induced by the weight of liquid refrigerant and embody refrigerant circulation in a short time in the early stage of heating operation by installing a bypass pipeline which connects a large amt. liquid connection pipeline which connects a heat source side unit with a user side unit with a small amt. liquid connection pipeline to the bottom of the connection pipeline and providing a flow rate control valve on the way of the bypass pipeline. CONSTITUTION:The refrigerant flow through a bypass pipeline 14 is made to flow into a large amt liquid connection pipeline C from a small amt. liquid connection pipeline C' by opening a flow rate control valve in the early stage of heating where refrigerant circulation is carried out by the refrigerant which has been built up only in the lower part pipeline, which makes it possible to embody refrigerant circulation between the small amt liquid pipeline C' and the large amt liquid pipeline C and the heat source unit 'a' in a short time irrespective of liquid refrigerant which has been built up in the user side units b1, b2, b3, and b4. The refrigerant circulation time can, therefore, be shortened.

公开(公告)号：JPH0452436A

公开(公告)日：1992-02-20

申请号：JP16211990

申请日：1990-06-20

Applicant: MATSUSHITA REFRIGERATION

Inventor： KURACHI MASAO

IPC: F24F5/00

Abstract: PURPOSE:To reduce the amount of refrigerant of each refrigeration cycle and minimize the danger of refrigerant leakage by laying out each unit properly, say, installing a heat source side heat exchanger unit on the roof and an auxiliary heat exchanger and a refrigerant carrier unit on the ceiling below. CONSTITUTION:This air conditioner comprises a compressor unit 16, a heat source side heat exchanger unit 17, auxiliary heat exchanger units 18a and 18b, and indoor units 14a to 14d where the compressor unit 16 is freely communicated with the heat source side heat exchanger unit 17 by connection pipes 20a and 20b while the compression unit is freely communicated with the auxiliary heat exchanger units 18a and 16b by connection pipes 21a and 21b; this auxiliary heat exchanger unit 18a is freely communicated with the refrigerant carrier unit 19a by connection pipes 22a and 22b; the auxiliary heat exchanger 18 with the refrigerant carrier 19b by connection pipes 22c and 22d. In addition, the refrigerant carrier unit 19a is freely communicated with the indoor units 14a and 14b by connection pipes 15a and 15b while the refrigerant carrier unit 19b with the indoor units 14c and 14d by connection pipes 15c and 15d.