JP2010266127A - Heat-pump type air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat-pump type air conditioner capable of properly carrying out heating by an indoor heat exchanger and heating of a heating panel, when simultaneously carrying out heating of the heating panel and the heating by the indoor heat exchanger. <P>SOLUTION: A refrigeration cycle is constituted by a compressor 11, a refrigerant circulation pipe 15, the indoor heat exchanger 16, an expansion valve 17, and an outdoor heat exchanger 18. First and second bypass pipes P1, P2 are connected to an upstream side refrigerant circulating pipe 15a, and first and second floor heating refrigerant pipes 24, 34 are embedded in a floor heating panel 25. High-temperature, high-pressure refrigerant gas discharged by the compressor 11 is sent to the first bypass pipe P1, and the floor-heating panel 25 is heated by heat exchange. The refrigerant gas is supplied to the indoor heat exchanger 16; heat-exchanged with air and becomes an intermediate temperature, intermediate pressure refrigerant liquid; the refrigerant liquid is supplied to the second bypass pipe P2 by downstream side refrigerant pipe 15b; heat exchange is carried out between the refrigerant liquid and the floor heating panel 25, and the floor heating panel 25 is heated. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a heat pump air conditioner capable of heating any one of a floor heating panel, a panel heater, and a radiator.

  As a conventional heat pump type floor heating apparatus, the one disclosed in Patent Document 1 has been proposed. This floor heating apparatus will be described with reference to FIG. A refrigerant circulation pipe 15 is connected to the discharge pipe 12 and the suction pipe 13 of the compressor via a four-way valve 14. An indoor heat exchanger 16, an expansion valve 17 and an outdoor heat exchanger 18 are connected to the refrigerant circulation pipe 15. A bypass pipe 51 is connected to the refrigerant circulation pipe 15 between the indoor heat exchanger 16 and the expansion valve 17, and the bypass pipe 51 is embedded in the floor heating panel 52. An electromagnetic valve 53 is connected to the refrigerant circulation pipe 15 between the two connecting portions of the bypass pipe 51. The compressor 11 is provided with an inverter 54 that controls the rotational speed of a variable speed motor that drives the compressor 11. A temperature sensor 55 for detecting an indoor heating load or a cooling load is provided on the outlet side of the indoor heat exchanger 16, and a temperature sensor 56 for detecting a floor heating load is provided on the floor heating panel 52. ing. Based on the detection values detected by the temperature sensors 55 and 56, a control signal is sent from the control device 57 to the inverter 54 and the variable speed motor of the blower fan 58 of the indoor heat exchanger 16.

  When the four-way valve 14 is switched to the heating port and the temperature detected by the temperature sensor 55 is low, such as immediately after the heating operation is started, and the indoor heating load is high, the compressor 11 Is operated at high capacity, and the continuous rotation heating of the blower fan 58 of the indoor heat exchanger 16 is performed, the room temperature rapidly rises, and the floor temperature gradually rises. Thereafter, after the room temperature reaches the set temperature first, the room temperature is maintained by the control operation of the blower fan 58, and the high capacity operation of the compressor 11 is continued. When the floor temperature reaches the set temperature, the blower fan 58 of the indoor heat exchanger 16 is stopped, heating is mainly switched to floor heating, and thereafter the room temperature is maintained by capacity control of the compressor 11.

  In the state where the four-way valve 14 is switched to the cooling port and the electromagnetic valve 53 is switched to the open port, the refrigerant gas in the refrigerant circulation pipe 15 flows in the direction opposite to the arrow in FIG. The indoor cooling operation by the indoor heat exchanger 16 is performed.

Japanese Utility Model Publication No. 61-145244

  However, the conventional heat pump type floor heating apparatus has the following problems because the bypass pipe 51 of only one system is connected to the refrigerant circulation pipe 15 on the downstream side of the indoor heat exchanger 16. That is, when the high-temperature and high-pressure refrigerant gas compressed by the compressor 11 is supplied from the refrigerant circulation pipe 15 to the indoor heat exchanger 16 and the room is heated by blowing hot air into the room, the indoor heat exchanger 16 is heated. The refrigerant gas after the heat exchange is performed as a refrigerant in a low-temperature / low-pressure gas-liquid mixed state and supplied to the bypass pipe 51. For this reason, when the area of the floor heating panel 52 is large, it is difficult to ensure the heat capacity necessary for floor heating, and it is difficult to optimize the temperature rising gradient of the floor heating panel 52.

  On the other hand, it is also conceivable to connect the bypass pipe 51 to the refrigerant circulation pipe 15 on the upstream side of the indoor heat exchanger 16. In this case, when the floor heating panel 52 has a large area, the refrigerant gas is heat-exchanged by the floor heating panel 52 and is changed to a low-temperature / low-pressure gas-liquid mixed refrigerant, so that it is supplied to the indoor heat exchanger 16. At that time, the heat capacity of the refrigerant decreases, heating by the indoor heat exchanger 16 cannot be performed efficiently, and the rising temperature of the room temperature is appropriate in a state where the heating load is large, such as at the start of heating operation. Can not be converted.

  The present invention eliminates the problems in the prior art and stabilizes the operation of the refrigeration cycle of the air conditioner when heating the heating panel and heating by the indoor heat exchanger at the same time. An object of the present invention is to provide a heat pump type air conditioner capable of appropriately performing heating and heating of a heating panel.

  In order to solve the above problems, the invention according to claim 1 is configured such that a refrigerant circulation pipe is connected to a compressor via a four-way valve, and an indoor heat exchanger, an expansion valve, and an outdoor unit for air conditioning are connected to the refrigerant circulation pipe. A heat exchanger is connected in order to form a refrigeration cycle, and in a heating operation state, a first bypass pipe embedded in a heating panel is connected to an upstream side refrigerant pipe of the indoor heat exchanger, and downstream of the indoor heat exchanger The second bypass pipe embedded in the heating panel is connected to the side refrigerant pipe, and the flow path is changed so that the first and second bypass pipes bypass the refrigerant with respect to the upstream and downstream refrigerant pipes, respectively. Means for preventing intrusion of refrigerant in the cooling operation state with respect to the first and second bypass pipes, and the compressor and the indoor heat exchanger are connected to an indoor heating load, a heating And gist that a control device for outputting a control signal for controlling in response to the heating load or the indoor cooling load Le.

  A second aspect of the present invention is the first aspect, wherein the pipes embedded in the heating panel of the first and second bypass pipes are a plurality of first shunt pipes and a plurality of second shunt pipes. This is the gist.

  According to a third aspect of the present invention, in the first or second aspect, the flow path changing means is provided in the upstream and downstream refrigerant pipes between the two connecting portions of the first and second bypass pipes. It is a check valve or a solenoid valve, and the gist is that the intrusion prevention means is a check valve or a solenoid valve provided in the first and second bypass pipes.

  The invention according to claim 4 is the temperature sensor according to any one of claims 1 to 3, wherein the means for detecting the heating load or the cooling load in the room is a temperature sensor for detecting the temperature of the air inlet of the indoor heat exchanger. The means for detecting the load on the heating panel is a temperature sensor for detecting the temperature of the heating panel.

The gist of the invention according to claim 5 is that, in any one of claims 1 to 4, the outdoor heat exchanger is a geothermal heat exchanger that uses geothermal heat.
(Function)
In the present invention, in the heating operation state of the indoor heat exchanger and the floor heating panel, the high-temperature and high-pressure refrigerant gas discharged from the compressor is led to the first bypass pipe, and heat exchange is performed with the heating panel. The heating panel is warmed. The refrigerant gas flowing out from the first bypass pipe enters the indoor heat exchanger, heat is exchanged with the indoor air, and the room is heated. The refrigerant that has flowed out of the indoor heat exchanger is guided to the second bypass pipe, heat exchange is performed with the heating panel, and the heating panel is warmed. Therefore, when the heating panel and the indoor heat exchanger are heated simultaneously under the same heating area of the heating panel, compared with the case where only one system of the bypass piping is embedded in the heating panel, the refrigeration cycle of the air conditioner Operation is stabilized and heating by the indoor heat exchanger and heating of the heating panel can be performed appropriately.

  ADVANTAGE OF THE INVENTION According to this invention, when heating operation of a heating panel and an indoor heat exchanger is carried out simultaneously, operation | movement of the refrigerating cycle of an air conditioner is stabilized, and heating by an indoor heat exchanger and heating of a heating panel can be performed appropriately. it can.

The circuit diagram of the heating operation state which shows one Embodiment of the heat pump type floor heating air conditioner which actualized this invention. The Mollier diagram which shows the relationship between the specific enthalpy of the refrigerant | coolant gas of a floor heating of a floor heating air conditioner and a room heating operation state, and a pressure. The Mollier diagram which shows the relationship between the specific enthalpy of the refrigerant gas of the floor heating operation state of a floor heating air conditioner, and a pressure. The circuit diagram of the cooling operation state of an air conditioner. The circuit diagram of the heat pump type floor heating air conditioner which shows another embodiment of this invention. The circuit diagram which shows the conventional heat pump floor heating air conditioner.

Hereinafter, an embodiment of a heat pump type air conditioner embodying the present invention will be described with reference to FIGS.
As shown in FIG. 1, a low-temperature / low-pressure, for example, new refrigerant HFC (410A) or carbon dioxide refrigerant gas is sucked and compressed, and discharged to a discharge port and a suction port of a compressor 11 that discharges a high-temperature / high-pressure refrigerant gas. A four-way valve 14 is connected to the connected discharge pipe 12 and suction pipe 13. A refrigerant circulation pipe 15 is connected to the four-way valve 14, and an indoor heat exchanger 16, an expansion valve 17 and an outdoor heat exchanger 18 are sequentially connected to the refrigerant circulation pipe 15, and these parts constitute a refrigeration cycle. ing.

Next, the floor heating pipe connected to the refrigerant circulation pipe 15 will be described.
In this embodiment, the refrigerant circulation pipe 15 between the four-way valve 14 and the indoor heat exchanger 16 is in the heating operation state described later of the air conditioner shown in FIG. 1 (the refrigerant gas flows in the direction of the arrow in FIG. 1). The upstream refrigerant pipe 15a of the indoor heat exchanger 16 is called. The refrigerant circulation pipe 15 between the indoor heat exchanger 16 and the expansion valve 17 is referred to as a downstream refrigerant pipe 15 b of the indoor heat exchanger 16.

  A refrigerant pipe 22 is branched and connected to the upstream refrigerant pipe 15a via a first branching device 21 (connecting part A), and a plurality of pipes ( For example, three first floor heating refrigerant pipes 24 are branched and connected. Each 1st floor heating refrigerant | coolant piping 24 is each embed | buried under the floor heating panel 25, for example in planar view hairpin shape. The first floor heating refrigerant pipes 24 are drawn out from the floor heating panel 25, and then merged by the first merger 26. From the first merger 26, the refrigerant pipe 27 and the second merger 28 (connection portion b). Is connected to the upstream refrigerant pipe 15a. In this embodiment, the first branching device 21, the refrigerant pipe 22, the first flow divider 23, the first floor heating refrigerant pipe 24, the first merger 26, the refrigerant pipe 27, the second merger 28, and the like are used. A first bypass pipe P <b> 1 for heating the panel 25 is configured.

  A first check valve 29 as a flow path changing unit is connected to the upstream refrigerant pipe 15 a between the first branching device 21 and the second merger 28. In the heating operation state, the refrigerant gas is supplied only to the first bypass pipe P1, and in the cooling operation state, the refrigerant gas flows through the upstream refrigerant pipe 15a in the direction opposite to the arrow. The refrigerant pipe 27 is provided with a second check valve 30 as intrusion prevention means so that refrigerant gas does not enter the first bypass pipe P1 in the cooling operation state.

  The above-described first bypass pipe P1 uses the high-temperature and high-pressure refrigerant gas in the upstream refrigerant pipe 15a before being supplied to the indoor heat exchanger 16 to heat the half floor surface of the floor heating panel 25. Is what you do.

  By the way, the refrigerant gas after being supplied to the first bypass pipe P1 is supplied to the indoor heat exchanger 16, heat exchanged with indoor air, and used for indoor heating. Thereafter, the other half floor surface of the floor heating panel 25 is heated using the refrigerant flowing into the downstream side refrigerant pipe 15b from the indoor heat exchanger 16. The second bypass pipe P2 for performing this floor heating will be described below.

  A refrigerant pipe 32 is branched and connected to the downstream refrigerant pipe 15b via a second branching device 31 (connecting section C), and a plurality of pipes (a third shunt 33 is provided at the tip of the refrigerant pipe 32). For example, three) second floor heating refrigerant pipes 34 are branched and connected. Each second floor heating refrigerant pipe 34 is embedded in the floor heating panel 25, for example, in the shape of a hairpin in a plan view. Each of the second floor heating refrigerant pipes 34 is drawn out from the floor heating panel 25 and then joined by a third merger 35, and the third merger 35 includes a refrigerant pipe 36 and a fourth merger 37 (connection portion h ) Is connected to the downstream refrigerant pipe 15b. In this embodiment, the second branch 31, the refrigerant pipe 32, the third flow divider 33, the second floor heating refrigerant pipe 34, the third merger 35, the refrigerant pipe 36, the fourth merger 37, and the like are used. The second bypass pipe P2 for heating the other half of the panel 25 is configured.

  A third check valve 38 as a flow path changing means is connected to the downstream refrigerant pipe 15 b between the second branch 31 and the fourth merger 37. In the heating operation state, the refrigerant gas is supplied to the second bypass pipe P2, and in the cooling operation state, the refrigerant gas flows through the downstream side refrigerant pipe 15b in the direction opposite to the arrow in FIG. The refrigerant pipe 36 is provided with a fourth check valve 39 as intrusion prevention means so that the refrigerant gas does not enter the second bypass pipe P2 in the cooling operation state.

  The passage area of the first floor heating refrigerant pipe 24 of the first bypass pipe P1 is set larger than the passage area of the second floor heating refrigerant pipe 34 of the second bypass pipe P2. The reason for this is that, as will be described later, the first floor heating refrigerant pipe 24 is supplied with a refrigerant gas that requires a large volume, and the second floor heating refrigerant pipe 34 is supplied with a refrigerant liquid that does not require a large volume. Because it is done.

Next, a control system for controlling the operation of the heat pump air conditioner will be described.
The compressor 11 is provided with an inverter 41 so that the rotational speed of the variable speed motor 42 that drives the compressor 11 is adjusted by changing the frequency of the voltage applied to the motor 42. The blower fan 43 of the indoor heat exchanger 16 is rotated by a variable speed motor 44. A first temperature sensor 45 for detecting the air suction temperature, that is, the heating load or the cooling load of the indoor heat exchanger 16 is provided in the vicinity of the air suction port of the indoor heat exchanger 16. The floor heating panel 25 is provided with a second temperature sensor 46 for detecting the floor temperature, that is, the heating load of the floor heating panel 25.

  Detection signals from the first and second temperature sensors 45 and 46 are transmitted to the control device 47 having a microcomputer. The control device 47 compares the detected values of the two temperatures with a preset reference value and outputs control signals to the inverter 41, the variable speed motor 44, and the throttle adjustment unit 48 of the expansion valve 17, respectively. It is like that. Although not shown, various signals are output to the controller 47 by a remote control switch, for example, switching operation between heating operation and cooling operation, adjustment of indoor heating temperature, adjustment of floor heating temperature, adjustment of cooling temperature, etc. A control signal to be performed is output, or a selection signal between the operation of floor heating only and the operation of floor heating and indoor heating by the indoor heat exchanger 16 is output.

Next, the operation of the heat pump type air conditioner configured as described above will be described.
FIG. 1 shows an initial state in which a heating operation command is transmitted from the remote control switch to the control device 47 and the heating operation of the air conditioner is started. In this state, a control signal is output from the control device 47 to the inverter 41, the variable speed motor 42 of the compressor 11 is operated at a high speed by the inverter 41, and a control signal is output to the variable speed motor 44. The fan 43 is rotated at high speed. The high-temperature (for example, 90 ° C.) and high-pressure refrigerant gas discharged from the compressor 11 is supplied to the upstream refrigerant pipe 15 a by the four-way valve 14, and is operated by the action of the first branching device 21 and the first check valve 29. It is led to the first bypass pipe P1. And heat exchange is carried out between the refrigerant gas of each said 1st floor heating refrigerant | coolant piping 24, and the floor heating panel 25, and the floor heating panel 25 is warmed. The refrigerant gas in a gas-liquid mixed state cooled by this heat exchange (for example, 60 ° C.) is led from the first merger 26 through the refrigerant pipe 27 and the second merger 28 to the upstream refrigerant pipe 15a, and the indoor heat It is supplied to the exchange 16. The refrigerant gas in the indoor heat exchanger 16 is heat-exchanged with the air blown into the room by the blower fan 43 and condensed, becomes a refrigerant liquid by the condensation latent heat, releases sensible heat, and has a low temperature (for example, The room is heated by this heat exchange.

  Thereafter, the refrigerant gas flowing out from the indoor heat exchanger 16 is supplied to the downstream refrigerant pipe 15b, flows from the second branch 31 constituting the second bypass pipe P2 to the refrigerant pipe 32, and flows from the third flow divider 33 to each floor. It flows into the heating refrigerant pipe 34, heat is exchanged between the refrigerant in each second floor heating refrigerant pipe 34 and the floor heating panel 25, and the floor heating panel 25 is warmed. Then, the refrigerant liquid cooled and condensed and liquefied by this heat exchange is cooled to a downstream refrigerant pipe 15b from the third merger 35 through the refrigerant pipe 36 and the fourth merger 37. Led. Thereafter, the refrigerant liquid is guided to the expansion valve 17 through the downstream refrigerant pipe 15b, and is decompressed and expanded to become a low-temperature (for example, 7 ° C.) and low-pressure refrigerant gas. Into the refrigerant gas (superheated steam) that has been warmed by absorbing the water and returned to the compressor 11.

  When a predetermined time elapses after the heating operation of the air conditioner is started, the indoor temperature and the temperature of the floor heating panel 25 rise. When the control device 47 determines that the detected value of the first temperature sensor 45 is equal to or higher than the set value, a stop signal is output from the control device 47 to the variable speed motor 44, and the indoor heat exchanger 16 Heating is stopped, and the refrigerant gas passes through the indoor heat exchanger 16 without being subjected to heat exchange, and is supplied to the second bypass pipe P2. In this way, only the floor heating panel 25 is heated by the first and second bypass pipes P1, P2. In this floor heating state, the control device 47 outputs a control signal to the inverter 41 of the compressor 11 based on the detection value of the second temperature sensor 46, and discharges the refrigerant gas of the compressor 11 according to the detected temperature. The capacity is controlled, and as a result, the floor temperature of the floor heating panel 25 is controlled to be a substantially constant target temperature.

  FIG. 2 shows a Mollier diagram in which the horizontal axis represents specific enthalpy and the vertical axis represents refrigerant gas pressure, and a refrigeration cycle. The indoor heat exchanger 16 heats the room, and the first and second Both bypass pipes P1 and P2 are in the state of floor heating. In this refrigeration cycle, the high-temperature (for example, 90 ° C.) and high-pressure refrigerant gas discharged from the compressor 11 passes through the first bypass pipe P1 in the condensing process from the connection (A) to (B) of the first bypass pipe P1. The latent heat of condensation of the refrigerant gas is used as the amount of heat radiation for floor heating of the floor heating panel 25. Further, the latent heat of condensation of the refrigerant gas from the connection part (b) to (c) is used as the heating heat radiation amount of the indoor heat exchanger 16. Further, the sensible heat of the refrigerant liquid (d) from the connection part (c) of the second bypass pipe P <b> 2 is used as the heat radiation amount for floor heating of the floor heating panel 25.

  FIG. 3 shows the refrigeration cycle of the first and second bypass pipes P1, P2 when the blower fan 43 of the indoor heat exchanger 16 is stopped. In this case, the latent heat and sensible heat of the refrigerant are all used as the floor heating radiation amount by the first and second bypass pipes P1 and P2.

  On the other hand, in FIG. 4, a cooling operation command is transmitted from the remote control switch to the control device 47, the cooling operation command is output from the control device 47 to the air conditioning device, and the flow direction of the refrigerant gas is switched by the four-way valve 14, The air conditioner is in a cooling operation. In this cooling operation state, the high-temperature and high-pressure refrigerant gas discharged from the compressor 11 is led from the discharge pipe 12 to the outdoor heat exchanger 18 through the four-way valve 14, where heat is exchanged with air, and the refrigerant gas is condensed. Then, the refrigerant liquid reaches the expansion valve 17 through the refrigerant circulation pipe 15, and the refrigerant liquid is decompressed and expanded by the expansion valve 17 to become refrigerant gas. The throttle amount of the expansion valve 17 is appropriately adjusted by the throttle adjusting unit 48 by a control signal output from the control device 47 according to the cooling load. The refrigerant gas does not flow to the second bypass pipe P2 due to the action of the third check valve 38 and the fourth check valve 39, but is led from the refrigerant circulation pipe 15 to the indoor heat exchanger 16, and the indoor heat exchanger 16 As a result, heat is exchanged with the air in the room, and the air is cooled in the room. Thereafter, the refrigerant gas emitted from the indoor heat exchanger 16 does not flow to the first bypass pipe P1 due to the action of the first check valve 29 and the second check valve 30, and passes through the upstream refrigerant pipe 15a to be compressed. 11 is returned. Therefore, in the state where the room is cooled, floor cooling is not necessary, and both the first and second bypass pipes P1 and P2 are stopped, and only the cooling operation by the indoor heat exchanger 16 is performed. .

According to the heat pump type air conditioner of the above embodiment, the following effects can be obtained.
(1) In the above embodiment, the first bypass pipe P1 is connected to the upstream refrigerant pipe 15a of the indoor heat exchanger 16, and the second bypass pipe P2 is connected to the downstream refrigerant pipe 15b. For this reason, compared with the conventional structure which connects bypass piping only to the upstream refrigerant | coolant piping 15a or the downstream refrigerant | coolant piping 15b, in the conditions with the same area of the floor heating panel 25, the indoor heating operation by the indoor heat exchanger 16 and The floor heating operation by the first and second bypass pipes P1 and P2 can be appropriately performed. That is, the high-temperature and high-pressure refrigerant gas discharged from the compressor 11 is excessively condensed and liquefied by heat exchange through the first bypass pipe P1, and the refrigerant gas does not run short in the heating operation by the indoor heat exchanger 16. For this reason, the temperature and pressure of the refrigerant gas supplied to the indoor heat exchanger 16 are properly maintained without reducing the temperature and pressure of the refrigerant gas, the phase change of the refrigerant in the refrigeration cycle is stabilized, and the operation of the refrigeration cycle Can be stabilized, and indoor heating by the indoor heat exchanger 16 can be appropriately performed. Further, the refrigerant liquid flowing out from the indoor heat exchanger 16 is guided to the second bypass pipe P2, exchanges heat with the floor heating panel 25, and is used for floor heating. Therefore, the sensible heat of the refrigerant liquid flowing out from the outdoor heat exchanger 18 can be effectively used as a heat source for floor heating, and the coefficient of performance (COP) of the heat pump can be improved.

  (2) In the above embodiment, since the refrigerant of the heat pump type air conditioner is used as the heat source of the floor heating circuit, the running cost can be reduced as compared with the boiler equipment and the electric heating type floor heating apparatus. .

  (3) In the above embodiment, the first and second bypass pipes P1, P2 embedded in the floor heating panel 25 are connected to the upstream and downstream refrigerant pipes 15a, 15b of the already installed air conditioner. I did it. For this reason, the floor heating apparatus which consists of the floor heating panel 25 and the 1st and 2nd bypass piping P1, P2 can be constructed easily, and it is not necessary to purchase a heat source machine newly in the house which has an air conditioner. Construction and equipment costs can be reduced.

  (4) In the above embodiment, the first and second bypass pipes P1, P2 are connected to the upstream and downstream refrigerant pipes 15a, 15b, and check valves 29, 38 are provided on both pipes 15a, 15b. The check valves 30 and 39 are provided in both the pipes P1 and P2, so that the cooled refrigerant gas does not enter the first and second bypass pipes P1 and P2 when the air conditioner is in the cooling operation state. For this reason, it is possible to prevent the first and second bypass pipes P1 and P2 from being frozen and broken.

(5) In the said embodiment, the control apparatus 47 which controls operation | movement of an air conditioning apparatus can perform easily the control operation of the floor heating by 1st and 2nd bypass piping P1, P2.
In addition, you may change the said embodiment as follows.

As shown in FIG. 5, a ground heat exchanger may be used as the outdoor heat exchanger 18 in which the refrigerant circulation pipe 15 is buried underground and heat exchange is performed between the refrigerant gas and the geothermal heat.
Although not shown, as the outdoor heat exchanger 18, the refrigerant circulation pipe 15 between the four-way valve 14 and the expansion valve 17 in the refrigerant circulation pipe 15 is accommodated in well water, and between the refrigerant gas and the well water. Heat exchange may be performed.

-As the outdoor heat exchanger 18, you may use the outdoor heat exchanger using the heat of water.
The first and second check valves 29, 30 and the third and fourth check valves 38, 39 may be changed to electromagnetic valves.

Although not shown, a panel heater or a radiator may be used as the heating panel instead of the floor heating panel 25.
-Although not shown, the first and second floor heating refrigerant pipes 24, 34 may be one, two, or four or more.

  As a means for detecting the indoor heating load, the heating load of the heating panel 25, or the indoor cooling load, in addition to the first and second temperature sensors 45 and 46, for example, the refrigerant pressure inside the downstream refrigerant pipe 15b is used. You may use the pressure sensor to detect, and the pressure sensor which detects the pressure of the refrigerant | coolant of the exit side of the 1st and 2nd floor heating refrigerant | coolant piping 24,34.

  P1 ... 1st bypass piping, P2 ... 2nd bypass piping, 11 ... Compressor, 14 ... Four-way valve, 15 ... Refrigerant circulation piping, 15a ... Upstream refrigerant piping, 15b ... Downstream refrigerant piping, 16 ... Indoor heat exchanger, DESCRIPTION OF SYMBOLS 17 ... Expansion valve, 18 ... Outdoor heat exchanger, 25 ... Floor heating panel, 29, 30, 38, 39 ... Check valve, 47 ... Control apparatus.

Claims (5)

Refrigerant circulation piping is connected to the compressor via a four-way valve, and an indoor heat exchanger for air conditioning, an expansion valve and an outdoor heat exchanger are connected to the refrigerant circulation piping in order to constitute a refrigeration cycle. A first bypass pipe embedded in the heating panel is connected to the upstream refrigerant pipe of the indoor heat exchanger, and a second bypass pipe embedded in the heating panel is connected to the downstream refrigerant pipe of the indoor heat exchanger. And a flow path changing means for bypassing the refrigerant in the first and second bypass pipes with respect to the upstream and downstream refrigerant pipes, respectively, and in the cooling operation state with respect to the first and second bypass pipes. In order to control the compressor and the indoor heat exchanger according to the heating load of the room, the heating load of the heating panel or the cooling load of the room The heat pump type air conditioning apparatus characterized by comprising a control unit for outputting a control signal. 2. The heat pump air conditioner according to claim 1, wherein the pipes embedded in the heating panel of the first and second bypass pipes are a plurality of first branch pipes and a plurality of second branch pipes. . In Claim 1 or 2, the flow path changing means is a check valve or a solenoid valve provided in the upstream and downstream refrigerant pipes between the two connecting parts of the first and second bypass pipes, The heat pump air conditioner, wherein the intrusion prevention means is a check valve or an electromagnetic valve provided in the first and second bypass pipes. The means for detecting the indoor heating load or the cooling load according to any one of claims 1 to 3 is a temperature sensor that detects a temperature of an air intake port of the indoor heat exchanger, and detects a load on the heating panel. The heat pump type air conditioner is characterized in that the means for detecting is a temperature sensor for detecting the temperature of the heating panel. The heat pump air conditioner according to any one of claims 1 to 4, wherein the outdoor heat exchanger is a geothermal heat exchanger that uses geothermal heat.

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