JP2011226757A - Air conditioner for fan coil type radiation air conditioning panel with heat pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce installation costs of an air conditioner and to minimize heat recovery loss of hot/cold water in the air conditioner.SOLUTION: This air conditioner 1 includes a fan coil disposed in hot/cold water piping 20, a heat pump water-refrigerant heat exchanger 12 exchanging heat between hot/cold water in the hot/cold water piping 20 and a refrigerant of a compressor 10, a radiation air conditioning water-water heat exchanger 33 exchanging heat between circulated water in a circulation water channel 31 and the hot/cold water in the hot/cold water piping 20, a radiation air conditioning water-refrigerant heat exchanger 34 exchanging heat between the refrigerant in refrigerant piping 15 and the circulated water in the circulation water channel 31, and a refrigerant-air heat exchanger 14 exchanging heat between the air distributed from an air blower 21 and the refrigerant in the refrigerant piping 15. The radiation air conditioning water-water heat exchanger 33 is disposed between the fan coil 22 and the heat pump water-refrigerant heat exchanger 12 in the hot/cold water piping 20, and the hot/cold water piping 20 is provided with a bypass passage 35 bypassing the fan coil 22.

Description

  The present invention relates to an air conditioner for a fan coil type radiant air conditioning panel with a heat pump that performs radiant cooling and heating, air conditioning cooling and heating, and outside air processing.

  Conventionally, as an air conditioner of a heat pump type refrigeration cycle, for example, as disclosed in Patent Document 1, there is a combination of a fan coil and a so-called heat pump as a refrigeration cycle.

  Patent Document 2 discloses a radiant air-conditioning panel that circulates a fluid and releases radiant heat of the fluid, and a dehumidifying device that prevents water droplets from falling into the ceiling or the room due to condensation that occurs in the radiant air-conditioning panel. An air conditioner having

JP-A-9-196422 JP 2008-51468 A

  By the way, in the air conditioner using the radiation air-conditioning panel as disclosed in Patent Document 2, it is necessary to provide a separate dehumidifying device for preventing condensation.

  In this regard, the present inventors can combine an air conditioner using a fan coil and a heat pump disclosed in Patent Document 1 with an air conditioner using a radiant air conditioning panel disclosed in Patent Document 2, respectively. We focused on being able to take advantage of. Specifically, the latent heat load is processed by the fan coil and the heat pump, the sensible heat load is processed by the radiant air conditioning panel, and the load distribution of the fan coil, the heat pump and the radiant air conditioning panel is adjusted. As a result, the operation load can be finely controlled.

  The temperature of the cold / hot water used in the fan coil is, for example, 7 ° C. in the case of cooling and 45 ° C. in the case of heating, while the circulating water used in the radiant air conditioning panel is 16 ° in the case of cooling. In the case of ℃ and heating, it is 34 ℃. Therefore, in an air conditioner that uses a combination of a fan coil and a radiant air conditioning panel, piping for supplying cold / hot water used in the fan coil and cold / hot water for heat exchange with circulating water used for the radiant air conditioning panel are provided. The temperature of the water flowing through the piping to be supplied is different, and it is necessary to provide each as a separate system. In this case, there is a problem that the facility design becomes complicated and the cost for construction and the like is increased.

  The inventors diligently studied this point, and the cold / hot water after heat exchange in the fan coil is used for heat exchange with the circulating water of the radiant air conditioning panel, and is further used as a heat source for intake / exhaust heat for the heat pump. If it is a simple structure, the piping for supplying cold / hot water used in the fan coil, the piping for supplying cold / hot water for heat exchange with the circulating water used in the radiant air-conditioning panel, and the heat source for intake and exhaust heat for the heat pump As a result, an air conditioner using a fan coil and a heat pump disclosed in Patent Document 1 and a radiant air conditioning panel disclosed in Patent Document 2 were used. Even when combined with an air conditioner, the idea is that the piping system can be prevented from becoming complicated and energy saving of the air conditioner can be achieved.

  Moreover, although the above-mentioned cold / hot water is normally supplied from the central heat source which consists of the combination of the boiler and refrigerator provided outside the air conditioner, generally the temperature of the cold / warm water when the central heat source is supplied and the central heat source The larger the difference from the temperature of the cold / warm water when returning to, the higher the thermal efficiency in the central heat source. In this regard, the air conditioner is configured such that the cold / hot water after heat exchange in the fan coil is used for heat exchange with the circulating water of the radiant air conditioning panel, and is further used as a heat source for heat absorption and exhaust heat for the heat pump. The temperature difference between the cold / hot water air conditioner inlet and outlet, that is, the temperature of the cold / warm water when supplied from the central heat source and the temperature of the cold / warm water when returning to the central heat source are minimized. This difference can be made larger than before, so energy saving can be expected for the entire system including the central heat source.

  The present invention has been made in view of the above points, and a radiant air conditioning panel is added to a fan coil type air conditioner equipped with a heat pump to perform radiant air conditioning, and radiant air conditioning can be used at the peak load of the air conditioning. Air conditioning load that cannot be processed by fan coil and heat pump air heat exchanger, latent heat load that cannot be handled by radiant air conditioning is supplemented by fan coil and heat pump air heat exchanger, and outside air treatment is performed by fan coil and heat pump air The purpose of the heat exchanger is to reduce the installation cost of the air conditioner and minimize the heat recovery loss of cold / hot water in the air conditioner.

  The present invention for achieving the above object is an air conditioner for a fan coil type radiant air conditioning panel with a heat pump that performs radiant cooling and heating, air conditioning cooling and heating, and external air treatment, to a chilled and hot water pipe for passing cold and hot water for air conditioning. A fan coil that is provided and exchanges heat between the air blown from the blower and the cold / hot water in the cold / hot water pipe, and the refrigerant in the refrigerant pipe connected to the cold / hot water in the cold / hot water pipe and the compressor Between the water-to-refrigerant heat exchanger for the heat pump that exchanges heat with the circulating water in the circulating water channel connected to the radiant air conditioning panel provided outside the air conditioner and the cold / hot water in the cold / hot water pipe Water-to-water heat exchanger for radiant air-conditioning that performs heat exchange in the air-cooling system, and water-to-refrigerant heat for radiant air-conditioning that is provided in the refrigerant pipe and exchanges heat between the refrigerant in the refrigerant pipe and the circulating water in the circulating water channel Exchanger and air blown from blower A refrigerant-to-air heat exchanger that exchanges heat with the refrigerant in the refrigerant pipe, and the radiant air-conditioning water-to-water heat exchanger and the radiant air-conditioning water-to-refrigerant heat exchanger The refrigerant-to-air heat exchanger and the radiant air-conditioning water-to-refrigerant heat exchanger are provided in parallel in the refrigerant pipe, and the radiant air-conditioning water-to-water heat exchanger is provided in the cold / hot water pipe. The heat pump water-to-refrigerant heat exchanger is provided with a bypass path that bypasses the fan coil.

  According to the present invention, the air conditioner has the water-to-water heat exchanger for radiant air conditioning provided between the fan coil and the water-to-refrigerant heat exchanger for heat pump in the cold / hot water pipe. The cold / hot water that has been subjected to the above can be used again for heat exchange with the circulating water in the circulation channel in the water-to-water heat exchanger for radiant air conditioning. Therefore, as in the prior art, when an air conditioner having a heat pump and an air conditioner using a radiant air conditioning panel are used in combination, piping for heat exchange with the heat pump refrigerant, which has been a separate system, and circulation of the radiant air conditioning panel It is not necessary to provide piping for water and heat exchange as a separate system. Thereby, it is possible to prevent the facility design from becoming complicated, to reduce the installation cost for construction and the like, and to minimize the heat recovery loss of the cold / hot water in the air conditioner.

  The circulation channel includes a circulation pump that circulates the circulating water in the circulation channel, a bypass channel that bypasses the water-to-water heat exchanger for radiant air conditioning and the water-to-refrigerant heat exchanger for radiant air conditioning, and the bypass channel. A proportional three-way valve that controls the amount of the circulating water passing through the pipe may be provided. In this case, a circulating water three-way valve for switching the circulating water flow to the radiant air conditioning water-to-water heat exchanger and the radiant air conditioning water-to-refrigerant heat exchanger is provided downstream of the bypass channel in the circulating water channel. It may be done.

  In the circulating water channel, circulating water that circulates the circulating water in the circulating water channel and circulating water that passes through the radiant air-conditioning water-to-water heat exchanger and the radiant air-conditioning water-to-refrigerant heat exchanger provided in parallel are provided. A proportional three-way valve for dispensing may be provided.

  The proportional three-way valve has a water-to-water heat exchanger for radiant air conditioning at an inlet of the radiant air conditioning panel in the circulation channel so that the temperature of the circulating water is 16 ° C. during cooling and 34 ° C. during heating. The amount of circulating water passing through the radiant air conditioning water to refrigerant heat exchanger may be controlled.

  Further, downstream of the merging point between the cold / hot water pipe and the bypass path in the cold / hot water pipe, another bypass path that bypasses the water-to-water heat exchanger for radiant air conditioning, and the other bypass path that passes through the other bypass path Another proportional three-way valve for controlling the amount of cold / hot water may be provided. In such a case, the other proportional three-way valve passes through the other bypass passage so that the temperature of the circulating water is 16 ° C. during cooling and 34 ° C. during heating at the entrance of the radiation air conditioning panel in the circulation water passage. You may control the quantity of the cold / hot water to perform.

  The circulating water channel is provided with a circulating pump for circulating the circulating water in the circulating water channel, and the circulating water is controlled at the inlet of the radiation air conditioning panel in the circulating water channel by controlling the rotation speed of the pump. The amount of circulating water passing through the water-to-water heat exchanger for radiant air conditioning may be controlled so that the temperature is 16 ° C. during cooling and 34 ° C. during heating.

Another aspect of the present invention is an air conditioner for a fan coil type radiant air conditioning panel with a heat pump that performs radiant cooling / heating, air conditioning cooling / heating, and outside air processing, and is provided in a chilled / hot water pipe through which chilled / warm water flows for air conditioning. The fan coil that exchanges heat between the air blown from the blower and the cold / hot water in the cold / hot water pipe, and the cold / hot water in the cold / hot water pipe and the refrigerant in the refrigerant pipe connected to the compressor Water-to-refrigerant heat exchanger for heat pump that performs heat exchange in the water, and water-to-water heat for radiant air-conditioning that performs heat exchange between the circulating water in the circulating water channel connected to the radiant air-conditioning panel and the cold / hot water in the cold / hot water pipe A radiant air conditioner, and a radiant air conditioning water-to-refrigerant heat exchanger that is provided in the refrigerant pipe and performs heat exchange between the refrigerant in the refrigerant pipe and the circulating water in the circulation channel. Water-to-water heat exchanger and water-to-cooling for radiant air conditioning The heat exchanger, arranged in series in the water circulation passage,
The water-to-water heat exchanger for radiant air conditioning is provided between the fan coil and the water-to-refrigerant heat exchanger for heat pump in the cold / hot water pipe, and the refrigerant-to-air heat exchanger and the water-to-refrigerant heat exchanger for radiant air conditioning Is provided in parallel in the refrigerant pipe, and the cold / hot water pipe is formed with a bypass path that bypasses the fan coil and the water-to-water heat exchanger for radiation air conditioning.

  Furthermore, the present invention according to another aspect is an air conditioner for a fan coil type radiant air conditioning panel with a heat pump that performs radiant cooling / heating, air conditioning heating / cooling, and outside air processing, and is provided in a chilled / hot water pipe through which chilled / hot water for air conditioning flows. The fan coil that exchanges heat between the air blown from the blower and the cold / hot water in the cold / hot water pipe, and the cold / hot water in the cold / hot water pipe and the refrigerant in the refrigerant pipe connected to the compressor Heat exchange between a water-to-refrigerant heat exchanger for heat pumps that performs heat exchange at the heat exchanger, circulating water in a circulating water channel connected to a radiant air conditioning panel provided outside the air conditioner, and cold / hot water in the cold / hot water pipe A water-to-water heat exchanger for radiant air-conditioning, and a water-to-refrigerant heat exchanger for radiant air-conditioning that is provided in the refrigerant pipe and performs heat exchange between the refrigerant in the refrigerant pipe and the circulating water in the circulation channel. The air blown from the blower and the cold A refrigerant-to-air heat exchanger that exchanges heat with the refrigerant in the pipe, and the water-to-water heat exchanger for radiant air conditioning and the water-to-refrigerant heat exchanger for radiant air conditioning are connected in the circulation channel. The radiant air-conditioning water-to-water heat exchanger is provided between the fan coil and the heat pump water-to-refrigerant heat exchanger in the cold / hot water pipe, and the refrigerant-to-air heat exchanger and the radiant air-conditioning water are provided in parallel. The refrigerant heat exchanger is provided in parallel in the refrigerant pipe, and the cold / hot water pipe is formed with a bypass path that bypasses the fan coil and the water-to-water heat exchanger for radiant air conditioning. It is said.

  In the cold / hot water pipe, upstream of the junction of the cold / hot water pipe and the bypass path is another bypass path that bypasses the water-to-water heat exchanger for radiation air conditioning, and the cold / hot water that passes through the other bypass path. Another proportional three-way valve for controlling the amount of

  Another aspect of the present invention is an air conditioner for a fan coil type radiant air-conditioning panel with a heat pump that performs radiant cooling / heating, air conditioning cooling / heating, and outside air processing, and is provided in a chilled / hot water pipe for passing cold / hot water for air conditioning. A fan coil for exchanging heat between the air blown from the blower and the cold / hot water in the cold / hot water pipe, the cold / hot water in the cold / hot water pipe, and the refrigerant in the refrigerant pipe connected to the compressor; Between the water-to-refrigerant heat exchanger for heat pump that performs heat exchange between the circulating water in the circulating water channel connected to the radiant air conditioning panel provided outside the air conditioner and the cold / hot water in the cold / hot water pipe Water-to-water heat exchanger for radiant air conditioning that performs heat exchange, and water-to-refrigerant heat exchange for radiant air conditioning that is provided in the refrigerant pipe and performs heat exchange between the refrigerant in the refrigerant pipe and the circulating water in the circulation channel. And the air blown from the blower A refrigerant-to-air heat exchanger that exchanges heat with the refrigerant in the refrigerant piping, and the water-to-water heat exchanger for radiant air conditioning and the water-to-refrigerant heat exchanger for radiant air conditioning are connected to the circulating water channel The refrigerant-to-air heat exchanger and the radiant air conditioning water-to-refrigerant heat exchanger are provided in series in the refrigerant pipe, and the radiant air-conditioning water-to-water heat exchanger is provided in the cold / hot water pipe. It is provided between the fan coil and the water-to-refrigerant heat exchanger for heat pump, and the cold / hot water pipe is formed with a bypass path that bypasses the fan coil.

  The circulation channel includes a circulation pump that circulates circulation water in the circulation channel, a bypass channel that bypasses the water-to-water heat exchanger for radiant air conditioning and the water-to-refrigerant heat exchanger for radiant air conditioning, and the bypass channel. And a proportional three-way valve for controlling the amount of the circulating water.

  In the circulation channel, a circulation pump that circulates the circulation water in the circulation channel and the amount of the circulating water that passes through the water-to-water heat exchanger for radiant air conditioning and / or the water-to-refrigerant heat exchanger for radiant air conditioning are controlled. A proportional three-way valve may be provided.

  According to the present invention, a radiant air conditioning panel is added to a fan coil type air conditioner equipped with a heat pump to perform radiant air conditioning, and an air conditioning load that cannot be dealt with by radiant air conditioning at the peak load of air conditioning, The air heat exchanger of the fan coil and heat pump compensates for the latent heat load that cannot be handled by radiant air conditioning, the air heat exchanger of the fan coil and heat pump treats the outside air, and the air heat exchanger of the fan coil and heat pump performs air conditioning. The installation cost of the machine can be reduced, and the heat recovery loss of cold / hot water in the air conditioner can be minimized.

It is a systematic diagram which shows the outline of a structure of the air conditioner which concerns on this Embodiment. It is explanatory drawing which shows a control table. It is a systematic diagram which shows the outline of a structure of the air conditioning machine which concerns on other embodiment. It is a systematic diagram which shows the outline of a structure of the air conditioning machine which concerns on other embodiment. It is a systematic diagram which shows the outline of a structure of the air conditioning machine which concerns on other embodiment. It is a systematic diagram which shows the outline of a structure of the air conditioning machine which concerns on other embodiment. It is a systematic diagram which shows the outline of a structure of the air conditioning machine which concerns on other embodiment. It is a systematic diagram which shows the outline of a structure of the air conditioning machine which concerns on other embodiment. It is a systematic diagram which shows the outline of a structure of the air conditioning machine which concerns on other embodiment. It is a systematic diagram which shows the outline of a structure of the air conditioning machine which concerns on other embodiment. It is a systematic diagram which shows the outline of a structure of the air conditioning machine which concerns on other embodiment. It is a systematic diagram which shows the outline of a structure of the air conditioning machine which concerns on other embodiment. It is a systematic diagram which shows the outline of a structure of the air conditioning machine which concerns on other embodiment. It is a systematic diagram which shows the outline of a structure of the air conditioning machine which concerns on other embodiment. It is a systematic diagram which shows the outline of a structure of the air conditioning machine which concerns on other embodiment.

  Embodiments of the present invention will be described below. FIG. 1 shows an example of an embodiment of an air conditioner 1 of the present invention.

  As shown in FIG. 1, the air conditioner 1 includes a heat pump circuit unit A, a fan coil circuit unit B, a radiant air conditioning panel circuit unit C, and a control unit D provided in a ceiling portion Ra of a room R, for example.

  The heat pump circuit unit A includes a compressor 10, a four-way valve 11 for switching between an operation mode of the heat pump circuit unit A, that is, a cooling operation and a heating operation, and a cold / hot water pipe 20 described later provided in the fan coil circuit unit B. A heat pump water-to-refrigerant heat exchanger 12 that performs heat exchange between the internal cold water or hot water (hereinafter referred to as “cold hot water”) and the refrigerant supplied from the compressor, the expansion valve 13, and the refrigerant and air. A refrigerant-to-air heat exchanger 14 that exchanges heat between them is connected to the refrigerant pipe 15 in this order. The refrigerant pipe 15 is provided with a water-to-refrigerant heat exchanger 34 for radiant air conditioning, which will be described later, in parallel with the refrigerant-to-air heat exchanger 14. Supply control valves 16a and 16b are respectively provided on the inlet side of the refrigerant-to-air heat exchanger 14 and the inlet side of the water-to-refrigerant heat exchanger 34 for the radiant air conditioning in the refrigerant pipe 15, and the supply control valves 16a and 16b are respectively provided. By performing the opening / closing operation, the supply of the refrigerant to the refrigerant-to-air heat exchanger 14 and the water-to-refrigerant heat exchanger 34 for radiant air conditioning can be controlled.

  The fan coil circuit section B exchanges heat between the cold / hot water pipe 20 through which the cold / hot water supplied by a pump (not shown), the air blown from the blower 21 and the cold / hot water in the cold / hot water pipe 20. And a fan coil 22 provided in the cold / hot water pipe 20. The cold / hot water pipe 20 is provided with a bypass path 23 that bypasses the fan coil 22, that is, connects the inlet side of the fan coil 22 and the outlet side of the fan coil 22 in the cold / hot water pipe 20. A cold / hot water three-way valve 24 for controlling the flow of cold / hot water to the fan coil 22 is provided at a location where the bypass passage 23 branches from the cold / hot water pipe 20. In addition, a cold / hot water temperature sensor 25 that measures the temperature of the cold / hot water in the cold / hot water pipe 20 is provided at the inlet of the water-to-refrigerant heat exchanger 12 for heat pump in the cold / hot water pipe 20. The cold / hot water supplied to the cold / hot water pipe 20 is adjusted to a predetermined temperature in a central heat source (not shown). Moreover, in FIG. 1, although the air blower 21 is drawing the example which air-conditions the air which circulates from the room R, outside air is mixed with the air which blows with the air blower 21, ie, the air conditioner 1 is used for external air processing. You may make it use.

  The radiant air-conditioning panel circuit unit C includes a circulation channel 31 for circulating circulating water for the radiant air-conditioning panel 30 to the radiant air-conditioning panel 30 provided outside the radiant air-conditioning panel circuit unit C, that is, outside the air conditioner 1. A circulation pump 32 provided in the circulation water channel 31, a water-to-water heat exchanger 33 for radiant air conditioning that performs heat exchange between the circulation water in the circulation water channel 31 and the cold / hot water in the cold / hot water pipe 20, and a refrigerant pipe 15, a water-to-refrigerant heat exchanger 34 for radiant air conditioning that performs heat exchange between the refrigerant in 15 and the circulating water in the circulation water channel 31. The circulation water channel 31 bypasses the radiant air-conditioning water-to-water heat exchanger 33, that is, the inlet side of the radiant air-conditioning water-to-water heat exchanger 33 and the outlet side of the radiant air-conditioning water-to-water heat exchanger 33 in the circulation water channel 31. Is formed. A proportional three-way valve 36 for controlling the flow rate of the circulating water passing through the bypass passage 35 is provided at a location where the circulation water passage 31 and the bypass passage 35 merge. The radiant air-conditioning panel 30 has a circulating water temperature of 18 ° C. at the outlet of the radiant air-conditioning panel 30 when a predetermined amount of circulating water of 16 ° C. is passed in an atmosphere at a room temperature of 27 ° C. In a case where a predetermined amount of circulating water of 34 ° C. is passed in an atmosphere of ° C., the heat transfer area is determined so that the circulating water temperature at the outlet of the radiation air conditioning panel 30 is 32 ° C. . The temperature of the circulating water that passes through the radiant air conditioning panel 30 is not limited to the present embodiment, and can be set arbitrarily.

  Further, on the downstream side of the location where the circulation channel 31 and the bypass channel 35 are branched, another circulation channel 37 is provided so as to bypass the water-to-water heat exchanger 33 for radiant air conditioning. The circulation water channel 31 is connected to the upstream side of the proportional three-way valve 36. The radiant air conditioning water-to-refrigerant heat exchanger 34 is provided in the other circulating water channel 37, and the radiant air-conditioning water-to-water heat exchanger 33 is in parallel with the circulating water channel 31. A circulating water three-way valve 38 is provided at a location where the circulating water channel 31 and the other circulating water channel 37 branch. By operating the circulating water three-way valve 38, the water for radiant air conditioning to the water heat exchanger 33 and the water for radiant air conditioning are provided. It is possible to switch to which of the refrigerant heat exchanger 34 the circulating water is passed. A water temperature sensor 39 that measures the temperature of the circulating water in the circulating water channel 31 is provided at the entrance of the radiation air conditioning panel 30 in the circulating water channel 31.

  On the upstream side of the blower 21, a room temperature sensor 50 and a humidity sensor 51 are provided for measuring the temperature and humidity in the room to be air-conditioned by the air conditioner 1. Further, the temperature at the downstream side of the refrigerant-to-air heat exchanger 14 in the heat pump circuit section A, that is, the temperature after the air blown by the blower 21 exchanges heat with the fan coil 22 and the refrigerant-to-air heat exchanger 14 is measured. A blowing temperature sensor 52 is provided. In FIG. 1, the room temperature sensor 50 and the humidity sensor 51 are depicted as being installed on the ceiling portion Ra. However, the room temperature sensor 50 and the humidity sensor 51 are, for example, as shown by broken lines in FIG. It may be installed in the room R.

  The control unit D receives the measurement results of the sensors and the temperature of the cold / hot water supplied to the cold / hot water pipe 20. In addition, the control unit D has a pattern for controlling the operation of each device of the air conditioner 1 such as the compressor 10 and the circulation pump 32 based on the measurement result of each sensor input to the control unit D. For example, the program which comprises the control table shown in FIG. 2 is stored. Further, the control unit D is provided with an operation unit (not shown) for switching the set temperature of the room temperature and the operation mode of the air conditioner 1.

  The control table will be described. As shown in FIG. 2, the control table includes the temperature of the cold / hot water input to the control unit D and the measurement results of the cold / hot water temperature sensor 25, the room temperature sensor 50, and the humidity sensor 51 for the cooling and heating operation modes. The operation pattern of each device constituting the air conditioner 1 corresponding to is preset. In FIG. 2, “FCU” in the “operation mode” column indicates the fan coil 22 and “HP” indicates the compressor 10, and “water” in the “circulation water three-way valve” column indicates circulation. “Water refrigerant” indicates that the water three-way valve 38 is switched to the radiant air conditioning water-to-water heat exchanger 33 side, and “water refrigerant” indicates that the circulating water three-way valve 38 is switched to the radiant air-conditioning water-to-refrigerant heat exchanger 34 side. ing.

  The measurement result of the room temperature sensor 50 is reflected in the control of operation and stop of the compressor 10, the fan coil 22, and the circulation pump 32. Specifically, the cooling operation of patterns 1 to 3 shown in the control table will be described as an example. When the temperature measured by the room temperature sensor 50 exceeds the set temperature of the room temperature by a predetermined temperature or more, the air conditioner 1 It can be determined that the operation load is not sufficient with respect to the indoor heat load and the outside air temperature. Therefore, when the temperature measured by the room temperature sensor 50 exceeds the set temperature of the room temperature by the first predetermined temperature or more, the compressor 10, the fan coil 22, and the fan 10 can be operated so that the air conditioner 1 can be operated at the maximum operating load. It is set to operate all the radiation air-conditioning panels 30 (operation pattern 1 in FIG. 2). In the control table of FIG. 2, the first predetermined temperature is 2 ° C., but this temperature is not limited to the contents of the present embodiment and can be set arbitrarily.

  When the difference between the set temperature of the room temperature and the measurement result of the room temperature sensor 50 is reduced by the operation of the air conditioner 1, and the difference becomes equal to or higher than the second predetermined temperature smaller than the first predetermined temperature. Then, it is determined that it is not necessary to operate the air conditioner 1 with the maximum operation load, and for example, the compressor 10, that is, the heat pump circuit unit B is stopped (operation pattern 2 in FIG. 2). Further, when the difference between the set temperature of the room temperature and the measurement result of the room temperature sensor 50 becomes smaller and the difference becomes smaller than the second predetermined temperature, the fan coil 22 is further stopped and only the radiant air conditioning panel 30 is stopped. (Operation pattern 3 in FIG. 2). Note that the stop of the fan coil 22 here means that the cold / hot water to the fan coil 22 is switched to the bypass path 23 side by switching the cold / hot water three-way valve 24 of the fan coil circuit section B regardless of the operating state of the blower 21. The state where water flow is stopped. Further, the second predetermined temperature is set to 1 ° C. in the control table of FIG. 2, but can be arbitrarily set similarly to the first predetermined temperature.

  The measurement result of the cold / hot water temperature sensor 25 is reflected in the control of the circulating water three-way valve 38 provided in the radiation air conditioning panel circuit part C. As described above, the radiant air conditioning panel 30 can obtain a predetermined cooling capacity by passing circulating water at 16 ° C., for example, in the cooling operation, but the measured temperature of the circulating water in the cold / hot water temperature sensor 25 is When it becomes 18 degreeC or more, the radiation | emission air-conditioning panel 30 cannot obtain predetermined cooling capacity. Accordingly, when the measured temperature of the circulating water in the cold / hot water temperature sensor 25 is 18 ° C. or higher, the switching three-way valve 38 of the radiant air conditioning panel circuit unit C is connected to the radiant air conditioning water from the radiant air conditioning water to water heat exchanger 33 side. It switches to the refrigerant | coolant heat exchanger 34 side, and it sets so that the circulating water of the circulating water channel 31 may be cooled by the heat pump circuit part A.

  The measurement result of the humidity sensor 51 indicates that, for example, when the humidity in the room R is high, condensation may occur in the radiant air conditioning panel 30. Therefore, in that case, the dew point temperature is calculated by the control unit D from the measurement results of the room temperature sensor 50 and the humidity sensor 51 and is compared with the measured temperature of the water temperature sensor 39 so that no condensation occurs in the radiant air conditioning panel 30. It is used for operating the heat pump circuit part A or the fan coil circuit part B.

  The control table shown in FIG. 2 includes a cooling operation using hot water, a cooling operation using hot water, a heating operation using hot water, a heating operation using cold water, and a cooling temperature in each operation mode. It is similarly set when the temperature of the cold / hot water supplied from the water pipe is changed.

  The air conditioner 1 according to the present embodiment is configured as described above. Next, an air conditioning method using the air conditioner 1 will be described. As a first example of the air conditioning method, a case where the room temperature is set to 27 ° C. by cooling operation and the cold / hot water supplied to the cold / hot water pipe 20 is 7 ° C. (patterns 1 to 3 in FIG. 2) will be described. .

  First, when starting the operation of the air conditioner 1, the air conditioning temperature in the room by the air conditioner 1 is set to 27 ° C., and cold / hot water is passed through the cold / hot water pipe 20. In this state, it is assumed that the temperature measured by the room temperature sensor 50 exceeds the set temperature of 27 ° C. by 2 ° C. or more.

  Next, the control unit D switches the cold / hot water three-way valve 24 of the fan coil circuit unit B to the fan coil 22 side and the circulating water three-way valve 38 of the radiant air conditioning panel circuit unit C to the radiant air conditioning water-to-water heat exchanger 33 side. Then, the supply control valve 16a of the refrigerant pipe 15 of the radiant air conditioning water-to-refrigerant heat exchanger 34 provided in the other circulating water passage 37 through which the circulating water is not passed is closed. Thereafter, the operation of the compressor 10, the circulating water pump 32, and the blower 21 is started.

  Then, the opening degree of the proportional three-way valve 36 is adjusted by the control unit D so that the temperature detected by the water temperature sensor 39 of the radiant air conditioning panel circuit unit C is 16 ° C., and in the water-to-water heat exchanger 33 for radiant air conditioning. Controls the amount of circulating water that exchanges heat with cold and hot water.

  When the temperature detected by the water temperature sensor 39 is stabilized at 16 ° C., the control unit D adjusts the load of the compressor 10 and performs control so that the room temperature reaches the set temperature of 27 ° C. (operation pattern 1 in FIG. 2). In this case, the measured temperature of the cold / hot water in the cold / hot water temperature sensor 25 is, for example, 17 ° C., and the water-to-water heat exchanger 33 for radiant air conditioning is used for cooling the circulating water.

  Thereafter, for example, when the temperature measured by the room temperature sensor 50 is equal to or higher than the set temperature + 1 ° C. and lower than the set temperature + 2 ° C. due to a decrease in the outside air temperature or the operation of the air conditioner 1, the air conditioner 1 starts from the operation pattern 1 of the control table. Transition to the operation pattern 2 state. Specifically, the operation of the compressor 10 is stopped, and the load adjustment of the air conditioner 1 is performed by adjusting the air volume of the blower 21 (operation pattern 2 in FIG. 2).

  Thereafter, when the temperature measured by the room temperature sensor 50 further decreases and the measured temperature becomes lower than the set temperature + 1 ° C., the fan coil 22 is stopped by the control unit D according to the control table, and the cold / hot water of the fan coil circuit unit B The three-way valve 24 is switched to the bypass path 23 side, and the air conditioner 1 is operated only by the radiant air conditioning panel circuit portion C (operation pattern 3 in FIG. 2). The load adjustment of the air conditioner 1 in a state where only the radiant air conditioning panel circuit unit C is operated is performed by adjusting the amount of circulating water flowing through the bypass passage 35 by the proportional three-way valve 36, that is, cooling / cooling in the water-to-water heat exchanger 33 for radiant air conditioning. This is performed by controlling the amount of heat exchange between the cold / hot water flowing in the water pipe 20 and the circulating water, and keeping the temperature detected by the water temperature sensor 39 at 16 ° C. Thereafter, when the temperature measured by the room temperature sensor 50 reaches the set temperature of the room temperature, the circulation pump 32 stops. When the room temperature rises due to the stop of the circulation pump 32, the circulation pump 32 is activated again, and the cooling operation by the radiation air conditioning panel circuit unit C is performed.

  In the first example, the temperature of the cold / hot water supplied to the cold / hot water pipe 20 is 7 ° C., but the temperature of the supplied cold / hot water is higher than 7 ° C., for example, 13 ° C. In this case, the temperature measured by the cold / hot water temperature sensor 25 of the cold / hot water heat-exchanged in the fan coil 22 is 18 ° C. or higher. In this case, as described above, the circulating water three-way valve 38 is operated so that the circulating water in the circulating water channel 31 is heat-exchanged by the radiant air conditioning water-to-refrigerant heat exchanger 34 (operation pattern 4 in FIG. 2). When the temperature of the cold / hot water is 13 ° C., for example, even if the operation of the compressor 10 is not necessary for heat exchange of the refrigerant-to-air heat exchanger 14 due to a decrease in room temperature, Since it is used for cooling the circulating water by the water-to-refrigerant heat exchanger 34, the operation of the compressor 10 is continued in this case (pattern 5 in FIG. 2). When the operating load of the air conditioner 1 further decreases, the operation of the fan coil 22 is stopped. In this case, the fan coil 22 is operated by switching the cold / hot water three-way valve 24 to the bypass path 23 side. Since the temperature of the cold / hot water at the inlet of the radiant air-conditioning water-to-water heat exchanger 33 is lower than when it is, the cooling water can be cooled by the radiant air-conditioning water-to-water heat exchanger 33, so the compressor 10 is stopped. The air conditioner 1 is operated only by the radiation air conditioning panel circuit part C (pattern 6 in FIG. 2). In this pattern 6, the operating state of each device of the air conditioner 1 is the same as the state of pattern 3 described above. However, in pattern 3 and pattern 6, the temperature of the cold / hot water supplied to the cold / hot water pipe 20 is as follows. Therefore, a difference occurs in the amount of circulating water that is passed through the bypass passage 35 by the proportional three-way valve 36.

  When the temperature of the cold / hot water supplied to the cold / hot water pipe 20 is higher than 13 ° C., for example, 20 ° C., the cooling capacity of the fan coil 22 by the cold / hot water is not sufficient. However, it can be used for cooling the refrigerant in the water-to-refrigerant heat exchanger 12 for the heat pump, so that the heat-to-air heat exchanger 14 and the radiation are radiated by the heat pump circuit section A as shown in the pattern 7 of FIG. The operation of the circulating water three-way valve 38 is controlled such that the refrigerant is supplied to the air-conditioning water-to-refrigerant heat exchanger 34. When the room temperature decreases, the supply of the refrigerant to the refrigerant-to-air heat exchanger 14 is stopped as shown in the pattern 8 of FIG. 2, and the air conditioner 1 is in the cooling operation by the radiant air conditioning panel circuit unit C. In some cases, the operation of the compressor 10, that is, the operation of the heat pump circuit section A is continued for cooling the circulating water in the radiant air conditioning water-to-refrigerant heat exchanger 34.

  Next, as a second example of the air conditioning method by the air conditioner 1, a case where dehumidification and reheating are performed when the air conditioner 1 is cooled will be described. When dehumidifying and reheating is performed by the air conditioner 1, the four-way valve 11 is switched so that the refrigerant flows from the refrigerant-to-air heat exchanger 14 toward the heat-pump water-to-refrigerant heat exchanger 12. By switching the four-way valve 11, a high-temperature refrigerant is supplied to the refrigerant-to-air heat exchanger 14. In such a case, air cooled by the fan coil 22 and saturated in humidity, for example, is dehumidified and reheated in the refrigerant-to-air heat exchanger 14 (operation pattern 9 in FIG. 2). Thereby, dehumidification reheating is possible in the air conditioner 1.

  Next, as a third example of the air conditioning method by the air conditioner 1, a case where the room temperature is set to 20 ° C. by heating operation and the cold / hot water supplied to the cold / hot water pipe 20 is 45 ° C. will be described.

  In the case of performing the heating operation by the air conditioner 1, as in the case of performing the cooling operation by the air conditioner 1, the indoor air conditioning temperature is set when the operation of the air conditioner 1 is started. In the heating operation, the air conditioning temperature is set to 20 ° C., for example. Next, while passing cold / hot water through the cold / hot water pipe 20, the control part D sets the cold / hot water three-way valve 24 of the fan coil circuit part B to the fan coil 22 side and the circulating water three-way valve 38 of the radiant air conditioning panel circuit part C. While switching to the radiant air-conditioning water-to-water heat exchanger 33 side, the supply control valve 16a of the refrigerant pipe 15 of the radiant air-conditioning water-to-refrigerant heat exchanger 34 provided in the other circulating water passage 37 through which the circulating water is not passed is closed. . Next, the operation of the compressor 10, the circulating water pump 32, and the blower 21 is started.

  Then, the opening degree of the proportional three-way valve 36 is adjusted by the control unit D so that the temperature detected by the water temperature sensor 39 of the radiant air conditioning panel circuit unit C is 34 ° C. The amount of circulating water that exchanges heat with water is controlled.

  When the temperature detected by the water temperature sensor 39 reaches 34 ° C., the control unit D adjusts the load of the compressor 10 and controls the room temperature to reach the set temperature of 20 ° C. (operation pattern 10 in FIG. 2). In this case, the measured temperature of the cold / hot water in the cold / hot water temperature sensor 25 is, for example, 35 ° C., and the water-to-water heat exchanger 33 for radiant air conditioning is used to heat the circulating water.

  Thereafter, when the temperature measured by the room temperature sensor 50 becomes lower than the set temperature −1 ° C. and exceeds the set temperature −2 ° C. due to, for example, an increase in the outside air temperature or the operation of the air conditioner 1, the air conditioner 1 The operation pattern 10 is shifted to the operation pattern 11 state. Specifically, the operation of the compressor 10 is stopped, and the load adjustment of the air conditioner 1 is performed by adjusting the air volume of the blower 21.

  Thereafter, when the temperature measured by the room temperature sensor 50 further rises and becomes higher than the set temperature −1 ° C., the fan coil 22 is stopped by the control unit D according to the control table, and the fan coil circuit unit B The cold / hot water three-way valve 24 is switched to the bypass path 23 side, and the air conditioner 1 is operated only by the radiant air conditioning panel circuit portion C (operation pattern 12 in FIG. 2). The load adjustment of the air conditioner 1 in a state where only the radiation air conditioning panel circuit section C is operated is performed by maintaining the temperature detected by the water temperature sensor 39 at 34 ° C. by the proportional three-way valve 36 as in the cooling operation. . Thereafter, when the temperature measured by the room temperature sensor 50 reaches the set temperature of the room temperature, the circulation pump 32 stops. When the room temperature decreases due to the stop of the circulation pump 32, the circulation pump 32 is activated again, and the heating operation by the radiant air-conditioning panel circuit unit C is performed.

  In the heating operation of the air conditioner 1, when the temperature of the cold / hot water supplied to the cold / hot water pipe 20 is 45 ° C. or less, the temperature of the cold / hot water cannot be used for the heating operation of the fan coil 22. Even if it is a case, heating operation can be performed by the air conditioner 1 by controlling the operation of the heat pump circuit unit A and the fan coil circuit unit B as shown in the operation patterns 13 to 15 of FIG. Moreover, even if the supply temperature of cold / hot water is 7 degreeC similar to the case where it is used for the cooling operation of the operation patterns 1-3 of FIG. 2, by pumping heat from cold / hot water by the heat pump circuit part A, Heating operation can be performed as shown in operation patterns 18 and 19 in FIG.

  In contrast to the operation patterns 18 and 19, in the cooling operation of the air conditioner 1, the temperature of the cold / hot water supplied to the cooling water pipe 20 is used for the heating operation of the operation patterns 10 to 12 in FIG. Even at the same 45 ° C., the cooling operation can be performed like the operation patterns 20 and 21 of FIG. 2 by discharging heat to the cold / hot water by the heat pump circuit unit A.

  According to the above embodiment, the air conditioner 1 has the radiant air conditioning water-to-water heat exchanger 33 provided between the fan coil 22 and the heat pump water-to-refrigerant heat exchanger 12 in the cold / hot water pipe 20. Therefore, the cold / hot water that has been heat-exchanged by the fan coil 22 can be used again for heat exchange with the circulating water in the circulation channel 31 in the water-to-water heat exchanger 33 for radiant air conditioning. Therefore, as in the prior art, when an air conditioner having a heat pump and an air conditioner using a radiant air conditioning panel are used in combination, piping for heat exchange with the heat pump refrigerant, which has been a separate system, and circulation of the radiant air conditioning panel It is not necessary to provide piping for water and heat exchange as a separate system. Thereby, it is possible to prevent the facility design from becoming complicated and reduce the cost of construction and the like, and it is possible to minimize the heat recovery loss of the cold / hot water in the air conditioner.

  In addition, the air conditioner 1 can compensate for the latent heat load that cannot be processed by radiant air conditioning by the fan coil circuit unit B and the heat pump circuit unit A.

  Further, as in the operation patterns 20 and 21 shown in FIG. 2, the cooling operation is possible even when the temperature of the cold / hot water is 45 ° C., for example, and the temperature of the cold / hot water is 7 ° C. Since the heating operation is possible as in operation patterns 18 and 19, for example, even when only one system of cold / hot water pipe 20 is provided in the building, the operation mode of each air conditioner 1 is selected. it can. Therefore, optimal air conditioning can be performed for each room in which the air conditioner 1 is provided regardless of the temperature condition of the cold / hot water.

  In the embodiment described above, the heat exchange of the circulating water is performed by either the radiant air conditioning water-to-water heat exchanger 33 or the radiant air-conditioning water-to-refrigerant heat exchanger 34 using the circulating water three-way valve 38. Although selected, for example, as shown in FIG. 3, instead of providing the circulating water three-way valve 38, a proportional three-way valve 36 is provided at the junction of the circulating water channel 31 and the other circulating water channel 37, and the proportional three-way valve 36 The temperature of the circulating water may be controlled by adjusting the amount of the circulating water distributed to each of the heat exchangers 33 and 34. The control of the proportional three-way valve 36 in the system shown in FIG. 3 is performed according to the case where the circulating water three-way valve 38 shown in the control table of FIG. 2 is switched. In such a case, since the circulating water three-way valve 38 and the bypass passage 35 are not necessary, the radiant air conditioning panel circuit portion C can be simplified.

  Further, in controlling the temperature of the circulating water in the circulation channel 31, the flow rate of the circulating water passing through the radiant air-conditioning water-to-water heat exchanger 33 is not controlled, but passing through the radiant air-conditioning water-to-water heat exchanger 33. You may carry out by controlling the flow volume of the cold / hot water. Specifically, for example, as shown in the system diagram of FIG. 4, instead of using the proportional three-way valve 36 described above, the cold / hot water pipe 20 is bypassed from the inlet side to the outlet side of the water-to-water heat exchanger 33 for radiant air conditioning. Alternatively, the other bypass passage 60 may be provided, and the proportional three-way valve 61 may be provided at a location where the cold / hot water pipe 20 and the other bypass passage 60 merge. Note that the control of the proportional three-way valve 61 in the system shown in FIG. 4 is also performed in accordance with the switching of the circulating water three-way valve 38 shown in the control table of FIG. Also in this case, the heat exchange amount between the cold / hot water and the circulating water in the water-to-water heat exchanger 33 for radiant air conditioning can be controlled by the proportional three-way valve 61.

  As described above, when the cooling water pipe 20 is provided with another bypass passage 60 and a proportional three-way valve 61, for example, instead of the bypass passage 23 as shown in FIG. 5, the fan coil 22 and the water-to-water heat exchanger for radiant air conditioning are used. 23, that is, a bypass path 63 connecting the inlet side of the fan coil 22 in the cold / hot water pipe 20 and the outlet side of the water-to-water heat exchanger 23 for radiant air conditioning may be provided. In such a case, the entire amount of the cold / hot water flowing through the cold / hot water pipe 20 can be diverted by the bypass path 63 and the cold / hot water three-way valve 24, bypassing the fan coil 22 and the radiant air conditioning water-to-water heat exchanger 23.

When the heat exchange amount between the cold / warm water and the circulating water in the water / water heat exchanger 33 for radiant air conditioning is controlled by the proportional three-way valve 61 provided in the cold / hot water pipe 20, for example, FIG.
As shown in FIG. 4, the radiant air-conditioning water-to-water heat exchanger 33 and the radiant air-conditioning water-to-refrigerant heat exchanger 34 may be provided in series with the circulating water channel 20 without providing the circulating water three-way valve 38. Also in the system of FIG. 6, for example, by passing the entire amount of cold / hot water supplied to the cold / hot water pipe 20 by the proportional three-way valve 61 through the other bypass passage 60, the same operation state as the pattern 4 of the control table of FIG. It can be. In such a case, since the three-way valve is not required at all in the radiant air conditioning panel circuit portion C, the system can be simplified.

  When the proportional three-way valve 61 is provided in the cold / hot water pipe 20, in addition to providing the radiant air-conditioning water-to-water heat exchanger 33 and the radiant air-conditioning water-to-refrigerant heat exchanger 34 in series with the circulation channel 20, for example, FIG. As shown, a heat pump water-to-refrigerant heat exchanger 12, a refrigerant-to-air heat exchanger 14, and a radiant air-conditioning water-to-refrigerant heat exchanger 34 may be provided in series with respect to the refrigerant pipe 15. In this case, the supply control valves 16a and 16b of the refrigerant pipe 15 and the pipes associated therewith are not required, so that the system of the air conditioner 1 can be further simplified.

  In the above embodiment, the temperature of the circulating water is controlled by using the proportional three-way valve 36 and the proportional three-way valve 61. However, the circulating water is circulated by adjusting the rotational speed of the circulation pump 32 by, for example, an inverter motor. You may control the temperature of water. Hereinafter, the air conditioner 100 which uses the rotation speed control of the circulation pump for the temperature control of the circulating water will be described with reference to FIG. 8 with the same reference numerals as those in FIG. 1 are not described here.

  In the air conditioner 1 shown in FIG. 1, the proportional three-way valve 36 is provided in the circulation channel 20 for controlling the temperature on the inlet side of the radiant air-conditioning panel 30, but in the air conditioner 100 shown in FIG. 8, the proportional three-way valve 36 is provided. In place of the circulation pump 32, a circulation pump 101 for controlling the rotational speed by an inverter motor is provided. Then, the flow rate of the circulating water flowing through the circulating water channel 31 is controlled by controlling the rotation speed of the circulating pump 101, and the heat of the circulating water in the air-conditioning water-to-water heat exchanger 33 or the radiant air-conditioning water-to-refrigerant heat exchanger 34 is controlled. Adjust the exchange amount.

  In the air conditioner 100, the operation of each device of the air conditioner 100 is controlled according to the control table shown in FIG. 2 except that the circulating pump 101 measures the temperature of the circulating water measured by the water temperature sensor 39.

  Even in such a case, the same operation as that of the air conditioner 1 can be performed, and the air conditioner 100 can simplify the system because it is not necessary to provide a proportional three-way valve. Furthermore, by controlling the rotational speed of the circulation pump 101, the power consumption in the circulation pump 101 can be reduced when the radiation air-conditioning panel circuit unit C is operated with an intermediate load.

  In the case of controlling the heat exchange amount of the circulating water in the radiant air-conditioning water-to-water heat exchanger 33 by controlling the number of rotations of the circulation pump 101 as in the air conditioner 100, the other bypass passages 60 shown in FIG. Instead of the proportional three-way valve 61, for example, as shown in FIG. 9, the bypass path 23 of the cold / hot water pipe 20 may be provided so as to join the outlet side of the water-to-water heat exchanger 33 for radiant air conditioning. In this case, the radiant air-conditioning water-to-water heat exchanger 33 and the radiant air-conditioning water-to-refrigerant heat exchanger 34 are provided in series with the circulation water channel 31. Even in such a case, the amount of heat exchange in the water-to-water heat exchanger 33 for radiant air conditioning is controlled by the rotational speed control of the circulation pump 101, and the presence or absence of heat exchange in the water for the radiant air-conditioning water to the refrigerant heat exchanger 34 is controlled by the supply control valve 16a. Therefore, the same operation as the air conditioner 1 can be performed.

  Moreover, when providing the bypass path 23 so that it may merge with the exit side of the water-to-water heat exchanger 33 for radiant air conditioning, as shown in FIG. 10, another cold / hot water three-way valve 62 is provided in the bypass path 23, You may make it switch so that cold / hot water may be supplied to the inlet side or outlet side of the water-to-water heat exchanger 33 for radiation air conditioning. By providing the other cold / hot water three-way valve 62, even when cold / hot water bypasses the fan coil 22, it is possible to pass cold / hot water to the radiant air conditioning water-to-water heat exchanger 33, as shown in FIG. The load control of the air conditioner 100 can be performed more finely than the case shown.

  In the case of controlling the heat exchange amount of the circulating water in the radiant air-conditioning water-to-water heat exchanger 33 by controlling the number of revolutions of the circulation pump 101 as in the air conditioner 100, as shown in FIG. The refrigerant heat exchanger 12, the refrigerant-to-air heat exchanger 14, and the radiant air conditioning water-to-refrigerant heat exchanger 34 are provided in series with respect to the refrigerant pipe 15, and the radiant air-conditioning water-to-water heat exchanger 33 and the radiation. An air-conditioning water-to-refrigerant heat exchanger 34 is provided in parallel with the circulating water channel 31, and the circulating water to the radiant air-conditioning water-to-water heat exchanger 33 and the radiant air-conditioning water-to-refrigerant heat exchanger 34 is provided by the circulating water three-way valve 38. You may make it switch water flow. Even in such a case, the system can be simplified while ensuring the function of the air conditioner 100.

  In the system diagram shown in FIG. 11, the heat exchange in the radiant air conditioning water-to-water heat exchanger 33 or the radiant air-conditioning water-to-refrigerant heat exchanger 34 is achieved by adjusting the flow rate of the circulating water flowing through the circulation water channel 31 by the circulation pump 101. Although the amount is controlled, for example, when the circulation pump 32 is used without using the circulation pump 101 as shown in FIG. 12, the bypass passage 35 and the proportional three-way valve are connected to the circulation water passage 31 similarly to the system shown in FIG. 36, the amount of heat exchange in the water-to-water heat exchanger 33 for radiant air conditioning or the water-to-refrigerant heat exchanger 34 for radiant air conditioning may be controlled.

  When the circulation pump 32 is used instead of the circulation pump 101 as shown in FIG. 12, instead of the bypass passage 35 and the proportional three-way valve 36, for example, as shown in FIG. You may make it provide the proportional three-way valve 64 in the location where the other circulation water channel 37 of the exit side of the water-to-refrigerant heat exchanger 34 merges. In such a case, the bypass path 35 can be omitted as compared with the system shown in FIG. 12, so that the system is simplified and the cost of piping work can be reduced.

  In the above embodiment, the expansion valve 13 is provided only on the refrigerant inlet side of the water-to-refrigerant heat exchanger 34 for radiant air conditioning when the compressor 10 is in a cooling operation. For example, as shown in FIG. In addition, an expansion valve 70 is provided on the refrigerant inlet side of the refrigerant-to-air heat exchanger 14 and the radiant air-conditioning water-to-refrigerant heat exchanger 34, respectively. An expansion valve 71 may be provided. In such a case, for example, even when the air conditioner 1 is operated in the cooling mode and the four-way valve 11 is switched to heat the heat pump circuit unit A and the refrigerant-to-air heat exchanger 14 performs dehumidification reheating, While dehumidifying and reheating with the air heat exchanger 14, the refrigerant is depressurized with another expansion valve, whereby the radiant air conditioning water-to-refrigerant heat exchanger 34 can cool the circulating water. Thereby, in performing dehumidification reheating, the cooling capacity larger than the air conditioners 1 and 100 which do not have the other expansion valve 71 can be acquired.

  In FIG. 14, the refrigerant-to-air heat exchanger 14 and the radiant air conditioning water-to-refrigerant heat exchanger 34 are provided in parallel with the refrigerant pipe 15. For example, as shown in FIG. 15, the refrigerant-to-air heat exchange is performed. When the condenser 14 and the radiant air conditioning water-to-refrigerant heat exchanger 34 are provided in series with the refrigerant pipe 15, the expansion valve 70 and the other expansion valve 71 are provided on the inlet side and the outlet side of the radiant air-conditioning water-to-refrigerant heat exchanger 34. Each should be provided. Even in such a case, for example, the refrigerant after dehumidifying and reheating in the refrigerant-to-air heat exchanger 14 is depressurized by the other expansion valve 71, thereby cooling the circulating water in the radiant air-conditioning water-to-refrigerant heat exchanger 34. It can be carried out. Further, as compared with the case of FIG. 11, one expansion valve 70 is not required, and the equipment cost can be reduced.

  In the above embodiment, the operation of the compressor 10 and the like provided in the air conditioners 1 and 100 is controlled based on the control table. For example, the control unit D controls the compressor 10 according to the operation load of the air conditioner 1. It is also possible to perform control by so-called feedback control in which the compressor 10 is stopped when the state in which the compressor 10 is below the predetermined load continues for a certain period of time. It is obvious for those skilled in the art that various changes or modifications can be conceived with respect to the control of the air conditioners 1 and 100 according to the present embodiment, and these naturally belong to the technical scope of the present invention. It is understood.

  The present invention is useful when performing radiant cooling and heating, air conditioning cooling and heating, and outside air processing with an air conditioner.

DESCRIPTION OF SYMBOLS 1 Air conditioner 10 Compressor 11 Four-way valve 12 Water-to-refrigerant heat exchanger for heat pump 13 Expansion valve 14 Refrigerant-to-air heat exchanger 15 Refrigerant piping 16a, 16b Supply control valve 20 Cold / hot water piping 21 Blower 22 Fan coil 23 Bypass 24 Cooling temperature Water three-way valve 25 Cold / hot water temperature sensor 30 Radiation air conditioning panel 31 Circulating water channel 32 Circulation pump 33 Radiation air conditioning water-to-water heat exchanger 34 Radiation air conditioning water-to-refrigerant heat exchanger 35 Bypass channel 36 Proportional three-way valve 37 Other circulation water channel 38 Circulation Water three-way valve 39 Water temperature sensor 50 Room temperature sensor 51 Humidity sensor 52 Outlet temperature sensor 60 Other bypass passage 61 Proportional three-way valve 62 Other cold / hot water three-way valve 63 Bypass passage 64 Proportional three-way valve 70 Expansion valve 71 Other expansion valve A Heat pump circuit Part B Fan coil circuit part C Radiation air-conditioning panel circuit part D Control part R Indoor Ra Ceiling part

Claims (14)

An air conditioner for a fan coil type radiant air conditioning panel with a heat pump that performs radiant cooling and heating, air conditioning heating and cooling, and outside air processing,
A fan coil that is provided in a cold / hot water pipe for passing cold / hot water for air conditioning, and performs heat exchange between the air blown from the blower and the cold / hot water in the cold / hot water pipe;
A water-to-refrigerant heat exchanger for heat pump that performs heat exchange between the cold / hot water in the cold / hot water pipe and the refrigerant in the refrigerant pipe connected to the compressor;
A water-to-water heat exchanger for radiant air conditioning that performs heat exchange between circulating water in a circulating water channel connected to a radiant air conditioning panel provided outside the air conditioner and cold / hot water in the cold / hot water pipe;
A water-to-refrigerant heat exchanger for radiant air conditioning that is provided in the refrigerant pipe and performs heat exchange between the refrigerant in the refrigerant pipe and the circulating water in the circulating water channel, air blown from a blower, and the refrigerant pipe A refrigerant-to-air heat exchanger that performs heat exchange with the other refrigerant,
The water-to-water heat exchanger for radiant air conditioning and the water-to-refrigerant heat exchanger for radiant air conditioning are provided in parallel in the circulation channel,
The refrigerant-to-air heat exchanger and the water-to-refrigerant heat exchanger for radiant air conditioning are provided in parallel in the refrigerant pipe,
The water-to-water heat exchanger for radiant air conditioning is provided between the fan coil and the water-to-refrigerant heat exchanger for the heat pump in the cold / hot water pipe,
An air conditioner for a fan coil type radiant air conditioning panel with a heat pump, wherein the cold / hot water pipe is formed with a bypass path that bypasses the fan coil. The circulation channel includes a circulation pump that circulates circulation water in the circulation channel, a bypass channel that bypasses the water-to-water heat exchanger for radiant air conditioning and the water-to-refrigerant heat exchanger for radiant air conditioning, and the bypass channel. The fan coil type radiant air-conditioning panel air conditioner with a heat pump according to claim 1, further comprising a proportional three-way valve for controlling the amount of the circulating water. A circulating water three-way valve is provided on the downstream side of the bypass channel in the circulating water channel to switch the circulating water to the radiant air conditioning water-to-water heat exchanger and the radiant air conditioning water-to-refrigerant heat exchanger. The fan coil type radiant air conditioning panel air conditioner with a heat pump according to claim 2, wherein The circulating water channel includes a circulating pump that circulates the circulating water in the circulating water channel, and circulating water that passes through the radiation air-conditioning water-to-water heat exchanger and the radiation air-conditioning water-to-refrigerant heat exchanger provided in parallel. The air conditioner for a fan coil type radiant air conditioning panel with a heat pump according to claim 1, wherein a proportional three-way valve for controlling a distribution amount is provided. The proportional three-way valve is configured such that the temperature of the circulating water is 16 ° C. during cooling and 34 ° C. during heating, and / or the water-to-water heat exchanger for radiant air conditioning and / or at the entrance of the radiation air conditioning panel in the circulation channel. The air-conditioner for a fan coil type radiant air-conditioning panel with a heat pump according to any one of claims 2 to 4, wherein the amount of circulating water passing through the water-to-refrigerant heat exchanger for radiant air-conditioning is controlled. In the cold / hot water pipe, downstream of the merging point of the cold / hot water pipe and the bypass path is another bypass path that bypasses the water-to-water heat exchanger for radiant air conditioning, and the cold / hot water that passes through the other bypass path. An air conditioner for a fan coil type radiant air conditioning panel with a heat pump according to claim 1, further comprising another proportional three-way valve that controls the amount of the heat pump. The other proportional three-way valve is a hot / cold water passing through the other bypass passage so that the temperature of the circulating water is 16 ° C. during cooling and 34 ° C. during heating at the entrance of the radiation air conditioning panel in the circulating water passage. The air conditioner for a fan coil type radiant air conditioning panel with a heat pump according to claim 6, wherein the amount of the air conditioner is controlled. The circulation channel is provided with a circulation pump for circulating the circulation water in the circulation channel,
By controlling the number of rotations of the pump, at the entrance of the radiation air conditioning panel in the circulation channel, the temperature of the circulating water is 16 ° C. during cooling and 34 ° C. during heating, and the water-to-water heat for radiation air conditioning The air conditioner for a fan coil type radiant air conditioning panel with a heat pump according to claim 1, wherein the amount of circulating water passing through the exchanger is controlled. It is an air conditioner for a fan coil type radiant air conditioning panel with a heat pump that performs radiant cooling and heating, air conditioning heating and cooling, and outside air processing,
A fan coil that is provided in a cold / hot water pipe for passing cold / hot water for air conditioning and performs heat exchange between the air blown from the blower and the cold / hot water in the cold / hot water pipe;
A water-to-refrigerant heat exchanger for heat pump that performs heat exchange between the cold / hot water in the cold / hot water pipe and the refrigerant in the refrigerant pipe connected to the compressor;
A water-to-water heat exchanger for radiant air conditioning that performs heat exchange between circulating water in a circulating water channel connected to a radiant air conditioning panel provided outside the air conditioner and cold / hot water in the cold / hot water pipe;
A water-to-refrigerant heat exchanger for radiant air conditioning that is provided in the refrigerant pipe and performs heat exchange between the refrigerant in the refrigerant pipe and the circulating water in the circulating water channel, air blown from a blower, and the refrigerant pipe A refrigerant-to-air heat exchanger that performs heat exchange with the other refrigerant,
The water-to-water heat exchanger for radiant air conditioning and the water-to-refrigerant heat exchanger for radiant air conditioning are provided in series in the circulation channel,
The water-to-water heat exchanger for radiant air conditioning is provided between the fan coil and the water-to-refrigerant heat exchanger for the heat pump in the cold / hot water pipe,
The refrigerant-to-air heat exchanger and the water-to-refrigerant heat exchanger for radiant air conditioning are provided in parallel in the refrigerant pipe,
An air conditioner for a fan coil type radiant air conditioning panel with a heat pump, wherein the cold / hot water pipe is formed with a bypass path that bypasses the fan coil and the water-to-water heat exchanger for radiant air conditioning. It is an air conditioner for a fan coil type radiant air conditioning panel with a heat pump that performs radiant cooling and heating, air conditioning heating and cooling, and outside air processing,
A fan coil that is provided in a cold / hot water pipe for passing cold / hot water for air conditioning and performs heat exchange between the air blown from the blower and the cold / hot water in the cold / hot water pipe;
A water-to-refrigerant heat exchanger for heat pump that performs heat exchange between the cold / hot water in the cold / hot water pipe and the refrigerant in the refrigerant pipe connected to the compressor;
A water-to-water heat exchanger for radiant air conditioning that performs heat exchange between circulating water in a circulating water channel connected to a radiant air conditioning panel provided outside the air conditioner and cold / hot water in the cold / hot water pipe;
A water-to-refrigerant heat exchanger for radiant air conditioning that is provided in the refrigerant pipe and performs heat exchange between the refrigerant in the refrigerant pipe and the circulating water in the circulating water channel, air blown from a blower, and the refrigerant pipe A refrigerant-to-air heat exchanger that performs heat exchange with the other refrigerant,
The water-to-water heat exchanger for radiant air conditioning and the water-to-refrigerant heat exchanger for radiant air conditioning are provided in parallel in the circulation channel,
The water-to-water heat exchanger for radiant air conditioning is provided between the fan coil and the water-to-refrigerant heat exchanger for the heat pump in the cold / hot water pipe,
The refrigerant-to-air heat exchanger and the water-to-refrigerant heat exchanger for radiant air conditioning are provided in parallel in the refrigerant pipe,
An air conditioner for a fan coil type radiant air conditioning panel with a heat pump, wherein the cold / hot water pipe is formed with a bypass path that bypasses the fan coil and the water-to-water heat exchanger for radiant air conditioning. In the cold / hot water pipe, upstream of the junction of the cold / hot water pipe and the bypass path is another bypass path that bypasses the water-to-water heat exchanger for radiation air conditioning, and the cold / hot water that passes through the other bypass path. 11. The fan coil type radiant air-conditioning panel air conditioner with a heat pump according to claim 10, further comprising another proportional three-way valve for controlling the amount of the air-conditioning panel. An air conditioner for a fan coil type radiant air conditioning panel with a heat pump that performs radiant cooling and heating, air conditioning heating and cooling, and outside air processing,
A fan coil that is provided in a cold / hot water pipe for passing cold / hot water for air conditioning, and performs heat exchange between the air blown from the blower and the cold / hot water in the cold / hot water pipe;
A water-to-refrigerant heat exchanger for heat pump that performs heat exchange between the cold / hot water in the cold / hot water pipe and the refrigerant in the refrigerant pipe connected to the compressor;
A water-to-water heat exchanger for radiant air conditioning that performs heat exchange between circulating water in a circulating water channel connected to a radiant air conditioning panel provided outside the air conditioner and cold / hot water in the cold / hot water pipe;
A water-to-refrigerant heat exchanger for radiant air conditioning that is provided in the refrigerant pipe and performs heat exchange between the refrigerant in the refrigerant pipe and the circulating water in the circulating water channel, air blown from a blower, and the refrigerant pipe A refrigerant-to-air heat exchanger that performs heat exchange with the other refrigerant,
The water-to-water heat exchanger for radiant air conditioning and the water-to-refrigerant heat exchanger for radiant air conditioning are provided in parallel in the circulation channel,
The refrigerant-to-air heat exchanger and the water-to-refrigerant heat exchanger for radiant air conditioning are provided in series in the refrigerant pipe,
The water-to-water heat exchanger for radiant air conditioning is provided between the fan coil and the water-to-refrigerant heat exchanger for the heat pump in the cold / hot water pipe,
An air conditioner for a fan coil type radiant air conditioning panel with a heat pump, wherein the cold / hot water pipe is formed with a bypass path that bypasses the fan coil. The circulation channel includes a circulation pump that circulates circulation water in the circulation channel, a bypass channel that bypasses the water-to-water heat exchanger for radiant air conditioning and the water-to-refrigerant heat exchanger for radiant air conditioning, and the bypass channel. An air conditioner for a fan coil type radiant air conditioning panel with a heat pump according to claim 12, wherein a proportional three-way valve for controlling the amount of the circulating water is provided. In the circulation channel, a circulation pump that circulates the circulation water in the circulation channel and the amount of the circulating water that passes through the water-to-water heat exchanger for radiant air conditioning and / or the water-to-refrigerant heat exchanger for radiant air conditioning are controlled. An air conditioner for a fan coil type radiant air conditioning panel with a heat pump according to claim 13, wherein a proportional three-way valve is provided.

Images