公开(公告)号：JPH0545017A

公开(公告)日：1993-02-23

申请号：JP19932391

申请日：1991-08-08

Applicant: MATSUSHITA REFRIGERATION

Inventor： TANAKA MASAYUKI ,  KURACHI MASAO ,  YANO KENICHIRO ,  MARUMOTO KAZUHIKO

IPC: F24F11/02 ,  F25B13/00

Abstract: PURPOSE:To improve a high lifting performance of a system and reduce an amount of enclosed refrigerant in a multi-chamber type cooling or heating device in which a refrigerant cycle at a heat source side and another refrigerant cycle at a utilizer are separated by a method wherein a proper amount of gaseous refrigerant within a small liquid side connection pipe is mixed with refrigerant under an over-cooled state in which a condensed and liquefied state is attained with a heat exchanger at the utilizer during a heating operation. CONSTITUTION:The first flow rate valve 14a for refrigerant is connected to a heat exchanger 12a of an indoor device b1, and the second flow rate valve 15a is arranged in parallel with the first flow rate valve 14a. Temperature sensing devices 16a and 17a for detecting refrigerant temperatures at an outlet of the indoor device and the outlet of the second flow rate valve 15a are provided. A control device 18a adjusts a degree of opening of the second flow rate valve 15a in response to the detected temperature. Accordingly, since a proper amount of saturated gas in a small liquid branch pipe d1 is mixed in a multi-liquid branch pipe (e1), a resistance caused by a weight of the liquid refrigerant within the multi-liquid side connection pipe (c) and a proper refrigerant circulation can be attained even if a high height difference is found between the refrigerant transporting device 11 and the indoor devices (b1, b2) and further an amount of enclosed gas can be reduced. As for the indoor device (b2) a similar state can be attained.

公开(公告)号：JPH04225748A

公开(公告)日：1992-08-14

申请号：JP40814090

申请日：1990-12-27

Applicant: MATSUSHITA REFRIGERATION

Inventor： HIROSE KENJI ,  KURACHI MASAO ,  MARUMOTO KAZUHIKO

IPC: F24F11/02

Abstract: PURPOSE:To provide a cooling/heating device which suppresses flowing-in of a gas refrigerant to a refrigerant pump and prevents shortening of life of the refrigerant pump from happening without being influenced by the outside air temperature by a method wherein in a cooling/heating device which is divided into a heat source side refrigerant cycle and a user side refrigerant cycle, the equipment is driven in a cooling cycle until the outside air temperature is detected and a liquid refrigerant is drawn in a refrigerant pump. CONSTITUTION:Heating is detected by a cooling/heating mode detecting means 20, and turning-on of a room temperature thermometer is detected by a room temperature thermometer detecting means 21, and a device driving means 22 drives a compressor 1 and a refrigerant pump 8 from the turning-on of the room temperature thermometer by heating mode for a period of time which is determined by an outside air temperature correction specified time detecting means 25, and the title cooling/heating device is constituted of a control device 26 which cooling-cycle-drives a heat source side refrigerant cycle 4-way valve 2 and a user side refrigerant cycle 4-way valve 9.

公开(公告)号：JPH04158147A

公开(公告)日：1992-06-01

申请号：JP28504990

申请日：1990-10-22

Applicant: MATSUSHITA REFRIGERATION

Inventor： HIROSE KENJI ,  KURACHI MASAO

IPC: F24F11/02

Abstract: PURPOSE:To restrict flowing of liquid refrigerant into a refrigerant pump by a method wherein a controller controls operation of a third solenoid valve at a time of cooling and operation of a second solenoid valve at a time of heating. CONSTITUTION:Heating or cooling is detected by a heating and cooling mode detecting means 18 and a current difference is calculated by a current difference calculating means 19. When operation mode is cooling mode and a refrigerant pump 10 is in liquid compressing operation, as the current difference is plus, a first solenoid valve 11 is opened, a third solenoid valve 13 is opened and closed repeatedly, and a second solenoid valve 12 and a fourth solenoid valve 14 are opened. At this time, refrigerant in a user side refrigerant cycle 15 flows and reaches the third solenoid valve 13 from the refrigerant pump 10 through the first solenoid valve 11, a user side heat exchanger 8 and a second auxiliary heat exchanger 7. Here, as the third solenoid valve 13 repeats to open and close, it becomes difficult for liquid to flow in by a large amount.

公开(公告)号：JPH04124562A

公开(公告)日：1992-04-24

申请号：JP24560490

申请日：1990-09-13

Applicant: MATSUSHITA REFRIGERATION

Inventor： MARUMOTO KAZUHIKO ,  KURACHI MASAO

IPC: F24F5/00 ,  F25B13/00

Abstract: PURPOSE:To prevent the generation of abnormal vibration or noise of a refrigerant carrier device and protect said device from any possible damage or erroneous system operation by providing a gas suction pipe inserted in an outlet pipe whose one end is positioned in the upper part of a gas liquid mixer and whose other end is positioned at the lower part of said liquid gas mixer which is installed between the refrigerant suction side and the user side four way valve of the refrigerant carrier device. CONSTITUTION:A gas liquid mixer 14 is connected between a refrigerant suction side and a four way valve 13 on the user side of a refrigerant carrier device 11. The refrigerant which has flowed in from an inlet pipe 16 separates gas refrigerant in the upper part in the gas liquid mixer 14 and liquid refrigerant in the lower part. When an attempt is made to absorb the liquid refrigerant into the refrigerant carrier device 11 from an outlet pipe 17. The gas refrigerant is absorbed from a gas suction pipe 18 where the gas refrigerant is mixed with the liquid refrigerant due to the flow of the liquid refrigerant. This construction makes it possible to allow the refrigerant carrier device to absorb gas refrigerant constantly into the suction side of the liquid refrigerant constantly. Furthermore, even if liquid refrigerant is partial evaporated and air foams are generated, it is possible absorb abnormal vibration of noise and further protect the refrigerant carrier device from any possible damage and erroneous system operation.

公开(公告)号：JPH0480540A

公开(公告)日：1992-03-13

申请号：JP19664290

申请日：1990-07-24

Applicant: MATSUSHITA REFRIGERATION

Inventor： TAKAHASHI TAKAHIRO ,  KURACHI MASAO

IPC: F24F5/00

Abstract: PURPOSE:To simply reversely circulate refrigerant of a user side refrigerant cycle by a unidirectional refrigerant conveying apparatus by closing an opening/ closing valve only at the time of switching a user side four-way valve, and switching the valve by using a pressure raised by the self-rising pressure of the apparatus. CONSTITUTION:Since the pressure of a first room 13d is raised by self-pressure rising action upon operation of a refrigerant conveying apparatus 1 due to a closed state at the time of room cooling, a pressure difference between the discharge pressure of the room 13d and that of a second room 13e is raised to press a slide valve 13j to the left side, and a user side four-way valve 13 becomes a room cooling state. At the time of room heating, an initial opening/ closing valve 14 is opened similarly to the time of room cooling, a four-way valve coil 13a is energized, and the piston 13k of a four-way pilot valve 13b is moved. Accordingly, the discharge pressure of a refrigerant conveying apparatus 11 is applied to the room 13e, suction pressure is applied to the room 13d, and the discharge pressure in the closed room 13e is raised by its self-pressure rising action. Therefore, the valve 13j is moved to the right side, and a user side four-way valve 14 becomes a room heating state.

公开(公告)号：JPH0468253A

公开(公告)日：1992-03-04

申请号：JP18087690

申请日：1990-07-09

Applicant: MATSUSHITA REFRIGERATION

Inventor： HIROSE KENJI ,  KURACHI MASAO

IPC: F24F11/02

Abstract: PURPOSE:To uniformize a flow rate to a plurality of refrigerant pumps by a method wherein respective flow rate valves are controlled so that a flow rate to the refrigerant pump having a high surface temperature is decreased and a flow rate to the refrigerant pump having a low surface temperature is increased. CONSTITUTION:A number of pulses set means 27 sets the number of pulses, by means of which, with the increase in the absolute value of differential temperature, an amount at which flow rate valves 19, 20, and 21 are closed in increase, in relation to the flow rate valves 19, 20, and 21 connected in series to refrigerant pumps 8, 9, and 10, respectively, wherein a differential temperature calculated by a differential temperature computing means 26 is a positive value. The number of pulses set means sets the number of pulses so that, with the increase in the absolute value of a differential temperature, an amount at which the flow rate valves 19, 20, and 21 are opened is increased responding to the absolute value of a differential temperature, in relation to the flow rate valves 10, 20, and 21 connected in series to the refrigerant pumps 8, 9, and 10 wherein a differential temperature calculated by the diffrential temperature computing means 26 is negative. A pulse output means 28 outputs the pulses of the number of pulses set by the number of pulse set means 27 to the corresponding flow rate valves 19, 20, and 21. This constitution uniformizes a flow rate to the refrigerant pumps 8, 9, and 10 and prevents the occurrence of a deficiency in capacity of a cooling and heating device and the damage of the refrigerant pump.

公开(公告)号：JPH0452434A

公开(公告)日：1992-02-20

申请号：JP16211690

申请日：1990-06-20

Applicant: MATSUSHITA REFRIGERATION

Inventor： KURACHI MASAO

IPC: F24F5/00

Abstract: PURPOSE:To make it possible to exert the whole function as one system by installing a plurality of heat source side refrigerant cycle which is freely communicated with a compressor, a heat side heat exchanger, a decompression device, and a first auxiliary heat exchanger in circular shape, a second auxiliary heat exchanger, a third auxiliary heat exchanger, and a fourth auxiliary heat exchanger. CONSTITUTION:When the load of indoor units q and h for a first system is increased while the load of indoor units q' and h' are small during cooling operation, the refrigerant of a user side refrigeration cycle for the first system is distributed to a third auxiliary heat exchanger 23 by way of connection pipelines k and l while the refrigerant of a user side for a second system is distributed to a fourth auxiliary heat exchanger 24 by way of connection pipelines k' and l', which moves the cooling power from the second system to the first system, thereby upgrading the power of the first system and responding to the load requirement. This is applicable to heating performance.

公开(公告)号：JPH03260558A

公开(公告)日：1991-11-20

申请号：JP5830890

申请日：1990-03-09

Applicant: MATSUSHITA REFRIGERATION

Inventor： YAMADA HIROYOSHI ,  KURACHI MASAO

IPC: F25B13/00

Abstract: PURPOSE:To improve efficiency by providing a third auxiliary heat exchanger which is formed integrally with a first auxiliary heat exchanger and conducts heat exchange between a use-side refrigeration cycle formed by connecting a second auxiliary heat exchanger conducting heat exchange, a refrigerant conveying device and a use-side heat exchanger in a circle together, and the suction-side of a compressor, a heat-source- side heat exchanger and a pressure reducing device. CONSTITUTION:While a two-phase refrigerant passing through a first auxiliary heat exchanger 8 in a cooling operation enters a compressor 1 through a heat-source-side four-way valve 2, it radiates heat in a heat-source-side heat exchanger 3 on the occasion and exchanges the heat with a condensed and liquefied refrigerant in a third auxiliary heat exchanger 13. Accordingly, the refrigerant entering the compressor 1 is evaporated and gasified through heat absorption in the third auxiliary heat exchanger before entering the compressor. Since the heat exchange is conducted in the third auxiliary heat exchanger, the refrigerant can flow in two phases through the first auxiliary heat exchanger 8. Therefore the efficiency can be improved, liquid packing is also eliminated and further the possibility of the compressor being faulty due to liquid compression is eliminated. Besides, supercooling can be attained to a large extent and, therefore, the capacity can be increased.

公开(公告)号：JPH03260531A

公开(公告)日：1991-11-20

申请号：JP5830990

申请日：1990-03-09

Applicant: MATSUSHITA REFRIGERATION

Inventor： KURACHI MASAO

IPC: F24F5/00

Abstract: PURPOSE:To adjust a refrigerant conveying capacity optimum to the length of pipings of outdoor and indoor units and operating condition of the indoor and outdoor units by arranging refrigerant conveying devices, a first main collecting pipe to pass a refrigerant passes to second auxiliary heat exchangers, a second main collecting pipe and a third main collecting pipe. CONSTITUTION:In the cooling operation, a liquid-rich refrigerant subjected to a heat exchange with a first auxiliary heat exchanger 18 using second auxiliary heat exchangers 19 is collected once to a second collecting pipe 25b passing through a second auxiliary heat exchanger coupling tube 19b from a refrigerant adjusting tank 20. The liquid-rich refrigerant collected is passed to refrigerant conveying devices 21 through a refrigerant conveying device connection tube 21a from the second collecting pipe 25b to be sent to a third collecting pipe 25c from a refrigerant conveying device connection tube 21b. Then, it is sent to user's side heat exchangers 22a and 22b through connection tubes i and j from the third collecting tube 25c and cooled by evaporation to be turned to a liquid-limited refrigerant. Then, the refrigerant is passed to the first collecting pipe 25a through connection pipings i' and j' and is circulated to the second auxiliary heat exchangers through a second auxiliary heat exchanger coupling tube 19a from the first collecting pipe 25a.

公开(公告)号：JPH03260530A

公开(公告)日：1991-11-20

申请号：JP5830790

申请日：1990-03-09

Applicant: MATSUSHITA REFRIGERATION

Inventor： KURACHI MASAO

IPC: F24F5/00

Abstract: PURPOSE:To obtain a multichamber airconditioning apparatus which enables operation with a system always stabilized by providing a user's side refrigerant cycle in which second auxiliary heat exchangers, a first collecting pipe, a plurality of user's side heat exchangers provided in respective indoor units, a third collecting pipe, refrigerant conveying devices and a second collecting pipe are interlocked to adjust the capacities of the refrigerant conveying devices optimally. CONSTITUTION:Second auxiliary heat exchangers 19 and refrigerant conveying devices 21 are separated in outdoor units (f) and (f') and connection pipes 19a and 19b and connection pipes 21a and 21b are arranged therein respectively. A first collecting pipe 23a is provided to group the connection pipes 19a, a second collecting pipe 23b to group the connection pipes 19b and 21a and a third collecting pipe 23c to group the connection pipes 21b and connection pipings i and i' are penetrated at one end of the first collecting pipe 23a and the third collecting pipe 23c respectively. This allows selection of the optimum operating capacity of the refrigerant conveying devices to match the number of the outdoor units to be operated, the length of pipings of the outdoor and indoor units, the number of the indoor units to be operated and indoor and outdoor loads. Thus, there is no drop in capacity of the indoor units owing to insufficiency of the capacity of the refrigerant conveying devices, thereby enabling efficient operation of a system with a stable capacity control.