JP5961084B2 - Radiant air conditioner - Google Patents

Description

  The present invention relates to a radiation type air conditioner.

  In a so-called separate type air conditioner, which is a heat pump type air conditioner for a house and divided into an outdoor unit and an indoor unit, the outdoor unit is provided with a heat exchanger and a fan, and the indoor unit also has a heat exchanger and a fan. It is a normal structure that is provided. On the other hand, even in the same separate type air conditioner, there is a type in which the indoor unit heat exchanger is configured as a radiant panel and the room is cooled or heated by heat radiation without using a fan. Exists. Examples thereof can be seen in Patent Documents 1 to 3.

  The air conditioner described in Patent Document 1 includes a radiation panel disposed on the ceiling of a building. Inside the radiation panel, refrigerant piping is arranged in a meandering manner. At the time of cooling operation, heat is absorbed by the radiant panel and radiant cooling is performed. During heating operation, heat is radiated from the radiant panel and radiant heating is performed. Radiant air conditioning is free from air agitation and noise from indoor fans, and can perform quiet and comfortable air conditioning.

  Patent Document 2 describes an air conditioner that performs cooling and heating using a plurality of radiation panels, such as arranging a radiation panel on a plurality of surfaces in a room, or installing a plurality of radiation panels even on one surface. Yes. In this air conditioner, a surface temperature detector is attached to the surface of each radiation panel, and the flow rate of the heat medium to each radiation panel is controlled according to the load of each radiation panel.

  Patent Document 3 describes a radiant air conditioner that can control room temperature at the same time as performing room temperature control with both a fan coil unit and a radiant panel.

Japanese Patent Laid-Open No. 10-205802 JP-A-4-320752 JP 2000-283535 A

  Aside from using a fan coil unit equipped with a blower and a radiant panel, such as an air conditioner described in Patent Document 3, an air conditioner that cools and heats only with a radiant panel positively moves the wind flow indoors. Therefore, room temperature cannot be detected properly. For this reason, the control is performed with reference to only the radiation panel temperature, which is somewhat difficult in that the control is performed so that the room temperature becomes comfortable.

  Although it is also required for a radiant air conditioner to perform control while referring to the room temperature, if a temperature detector for measuring the room temperature is arranged in the radiant panel in the usual way, the heat radiation part of the radiant panel The measurement results are distorted by the influence of radiant heat generated by the radiant heat and radiant heat generated by the refrigerant piping. If a room temperature detector is placed on an element that is used away from the radiant panel, such as a remote controller, there is no need to worry about the effects of radiant heat generated by the heat radiating part of the radiant panel or radiant heat generated by the refrigerant piping. The problem is how to transmit the room temperature measurement results. If wireless communication is performed, wireless communication must be performed in accordance with the sampling rate. In the case of a remote controller, battery consumption is accelerated.

  The present invention has been made in view of the above-described problems, and is capable of appropriately detecting room temperature and performing fine and comfortable air conditioning control even in a windless type radiant air conditioner without a blower. With the goal.

  A radiant air conditioner according to the present invention includes a radiant panel disposed indoors, an outdoor heat exchanger, and a compressor that circulates refrigerant through refrigerant piping through the radiant panel and the outdoor heat exchanger. The radiant panel has a heat dissipating part disposed in a housing, an upper room temperature detector is disposed above the radiant panel, and a lower room temperature detector is disposed below the radiant panel. The control unit of the machine performs control with reference to an output signal from the upper room temperature detector or the lower room temperature detector.

  During air-conditioning operation where the radiant panel is an evaporator (for example, during cooling operation), an air flow is generated from the upper part to the lower part of the radiant panel, and the air greeted by the upper part of the radiant panel is affected by the radiant heat of the heat dissipation part. There will be no air. During air-conditioning operation where the radiant panel is a condenser (for example, during heating operation), an airflow is generated from the lower part of the radiant panel to the upper part, and the air greeted by the lower part of the radiant panel is affected by the radiant heat of the heat dissipation part. There will be no air. By arranging room temperature detectors at the upper and lower parts of the radiant panel, the effects of the radiant heat of the heat radiating part can be reduced both in air conditioning operation where the radiant panel is an evaporator and in air conditioning operation where the radiant panel is a condenser. Since the temperature of indoor air that has not been received can be measured, it is possible to know the room temperature appropriately and perform fine and comfortable air conditioning control.

  In the radiant air conditioner configured as described above, the control unit performs control with reference to an output signal from the upper room temperature detector during cooling operation, and refers to an output signal from the lower room temperature detector during heating operation. It is preferable to perform control.

  According to this configuration, the temperature of the room air that is not affected by the radiant heat of the heat radiating unit is measured by the upper room temperature detector during the cooling operation, and the temperature of the room air that is not affected by the radiant heat of the heat radiating unit is lowered during the heating operation. Since it is measured by a room temperature detector, it is possible to appropriately grasp the temperature of the indoor air whose temperature is to be changed, and to perform fine and comfortable air conditioning control.

  In the radiant air conditioner having the above-described configuration, a refrigerant pipe temperature detector that detects a temperature of the refrigerant pipe is attached to an inner part of the refrigerant pipe connected to the heat radiating unit, and the control unit is configured to control the refrigerant pipe temperature. It is preferable to perform the control while also referring to the output signal from the detector.

  According to this configuration, the control unit performs the control while referring to only the temperature of the refrigerant flowing through the heat radiating unit instead of performing the control only with reference to the room temperature, so that the room temperature can be brought closer to the target temperature more quickly. . In addition, the surface temperature of the radiant panel can be detected at the same position regardless of whether the refrigerant path of the radiant panel is the refrigerant path during cooling operation or the refrigerant path during heating operation. There is no need to change the control specifications. Furthermore, since the refrigerant pipe temperature detector is attached to the refrigerant pipe instead of on the surface of the radiation panel, there is little possibility that condensed water will wet the refrigerant pipe temperature detector, and the refrigerant pipe temperature detector is less likely to be erroneously detected. it can.

  In the radiant air conditioner having the above-described configuration, the refrigerant pipe to which the refrigerant pipe temperature detector is attached is a refrigerant pipe for liquid refrigerant, and the control unit detects the refrigerant pipe temperature detector during cooling operation. It is preferable to refer to the surface temperature of the radiant panel as the surface temperature of the radiant panel, and to reference the temperature obtained by adding a correction temperature to the temperature detected by the refrigerant pipe temperature detector during heating operation.

  According to this configuration, the surface temperature of the radiation panel can be accurately predicted by correcting the temperature by predicting the degree of supercooling of the heat radiating unit from the temperature of the refrigerant pipe during heating operation.

  According to the present invention, it is possible to know the room temperature appropriately by measuring the temperature of the indoor air that is not affected by the radiant heat of the heat radiating part during the cooling operation or the heating operation, and perform fine and comfortable air conditioning control. Can do.

It is a schematic block diagram of the radiation type air conditioner which concerns on this invention, and shows the state at the time of air_conditionaing | cooling operation. It is a schematic block diagram of the radiation type air conditioner which concerns on this invention, and shows the state at the time of heating operation. It is a schematic block diagram which shows 1st Embodiment of a radiation panel. It is a schematic block diagram which shows 2nd Embodiment of a radiation panel. It is a schematic block diagram which shows 3rd Embodiment of a radiation panel. It is sectional drawing which shows 1st Embodiment of a thermal radiation part. It is sectional drawing which shows 2nd Embodiment of a thermal radiation part. It is a control block diagram of a radiation type air conditioner. It is a control flowchart at the time of air_conditionaing | cooling operation of a radiation type air conditioner. It is a control flowchart at the time of heating operation of a radiation type air conditioner. It is explanatory drawing which shows the indoor airflow at the time of air_conditionaing | cooling operation. It is explanatory drawing which shows the indoor airflow at the time of heating operation.

  A schematic configuration of the radiant air conditioner 1 will be described with reference to FIG. The radiant air conditioner 1 includes an outdoor unit 10 and a radiant panel 30. The radiation panel 30 is disposed indoors and corresponds to an indoor unit of a normal separate type air conditioner.

  The outdoor unit 10 houses a compressor 12, a four-way valve 13, an outdoor heat exchanger 14, an expansion valve 15, an outdoor blower 16, and the like in a housing 11 composed of sheet metal parts and synthetic resin parts. doing.

  The outdoor unit 10 is connected to the radiation panel 30 through two refrigerant pipes 17 and 18. The refrigerant pipe 17 is intended to flow a liquid refrigerant, and a pipe that is thinner than the refrigerant pipe 18 is used. Therefore, the refrigerant pipe 17 may be referred to as “liquid pipe”, “narrow pipe”, or the like. The refrigerant pipe 18 is intended to flow a gaseous refrigerant, and is thicker than the refrigerant pipe 17. Therefore, the refrigerant pipe 18 may be referred to as “gas pipe”, “thick pipe”, or the like. For example, HFC R410A or R32 is used as the refrigerant.

  In the refrigerant pipe inside the outdoor unit 10, a two-way valve 19 is provided in the refrigerant pipe connected to the refrigerant pipe 17, and a three-way valve 20 is provided in the refrigerant pipe connected to the refrigerant pipe 18. The two-way valve 19 and the three-way valve 20 are closed when the refrigerant pipes 17 and 18 are removed from the outdoor unit 10 to prevent the refrigerant from leaking from the outdoor unit 10 to the outside. When it is necessary to release the refrigerant from the outdoor unit 10 or from the entire refrigeration cycle including the radiation panel 30, the refrigerant is released through the three-way valve 20.

  The radiation panel 30 is often erected on the wall of the room, and a plurality of heat dissipating portions 32 are disposed inside a front-shaped rectangular casing 31 made up of sheet metal parts and synthetic resin parts. Although it was named “heat radiating part” for simplicity, this part not only radiates heat to the surrounding air during heating operation, but also absorbs heat from the surrounding air during cooling operation.

  The heat radiating part 32 is a cylindrical part and is arranged vertically. As shown in FIGS. 6 and 7, the basic configuration of the heat radiating section 32 is that the heat radiating fins 34 surround the central refrigerant pipe 33. The refrigerant pipe 33 and the heat radiating fins 34 are formed of a metal having good heat conductivity such as copper or aluminum and are in close contact with each other. The “vertical” referred to here is not limited to a strict vertical direction. The vertical direction including some inclination may be used.

  Both the heat dissipating fins 34 in FIG. 6 and the heat dissipating fins 34 in FIG. 7 have a horizontal cross-sectional shape in which a plurality of fins expand radially. 6 is formed as a part divided into two along the axial direction, and sandwiches the refrigerant tube 33 from the front and rear. The radiating fin 34 in FIG. 7 is a single component, and a refrigerant pipe 33 is inserted in a central portion corresponding to a wheel in terms of wheels. Needless to say, the structure of the heat dissipating part 32 shown in FIGS. 6 and 7 is merely an example, and heat dissipating fins 34 having different cross-sectional shapes can be used, or the refrigerant pipe 33 and the heat dissipating fins 34 can be combined in different ways. It is.

  A plurality (seven in the figure) of heat radiating portions 32 are arranged in the housing 31 so as to be parallel to each other. An opening 35 for exposing the heat radiating portion 32 is provided on the front surface of the housing 31. The plurality of heat radiation portions 32 are all connected to the refrigerant pipes 17 and 18. In the connection configuration example shown in FIG. 3, all the heat radiating portions 32 are connected in parallel to the refrigerant pipes 17 and 18. In the connection configuration example shown in FIG. 4, all the heat radiating sections 32 are connected in series to the refrigerant pipes 17 and 18.

  A system other than the system shown in FIGS. 3 and 4 may be employed to connect the plurality of heat radiation units 32. For example, it is possible to group a plurality of heat dissipating units 32 by a predetermined number, connect the heat dissipating units 32 belonging to the same group in parallel, and connect the groups in series. Alternatively, it is also possible to group a plurality of heat dissipating parts 32 by a predetermined number, connect the heat dissipating parts 32 belonging to the same group in series, and connect the groups in parallel.

  In order to control the operation of the radiant air conditioner 1, it is indispensable to know the temperature of each place. For this purpose, temperature detectors are arranged in the outdoor unit 10 and the radiation panel 30. In the outdoor unit 10, a temperature detector 21 is disposed in the outdoor heat exchanger 14, and a temperature detector 22 is disposed in the discharge pipe 12 a serving as the discharge unit of the compressor 12, and the suction serving as the suction unit of the compressor 12. A temperature detector 23 is disposed in the pipe 12 b, and a temperature detector 24 is disposed in the refrigerant pipe between the expansion valve 15 and the two-way valve 19. A temperature detector 36 is disposed on the radiation panel 30. Each of the temperature detectors 21, 22, 23, 24, and 36 is formed of a thermistor.

  The temperature detector 36 is intended to measure the temperature of the heat radiating section 32, but is not directly attached to the heat radiating section 32 but is attached to the refrigerant pipe 17 for liquid refrigerant as shown in FIG. The reason for arranging the temperature detector 36 in the refrigerant pipe 17 is as follows. That is, since the temperature of the heat radiating portion 32 varies depending on the position (particularly the upper and lower positions), it is difficult to determine at which position the temperature detector 36 is disposed.

  The surface temperature of the heat radiating portion 32 also depends on how the refrigerant path connecting the plurality of heat radiating portions 32 is designed. When the refrigerant path is a single path, a temperature difference is likely to occur due to a pressure loss or a gas-liquid phase change of the refrigerant. When there are a plurality of refrigerant paths, a temperature difference may occur depending on the path. Some temperature detectors are covered with metal to improve temperature sensitivity. When the metal constituting the heat radiating portion 32 and the metal used in the temperature detector are different, a potential difference due to a different metal is generated at the contact portion, and there is a possibility of causing electric corrosion. In any case, it is not easy to determine at which position of the heat radiation part 32 the temperature detector 36 is arranged.

  If the refrigerant pipe 17 inside the casing 31 is used as the attachment location of the temperature detector 36, the above problem is solved. The refrigerant pipe 17 is a location where the refrigerant throttled by the expansion valve 15 flows in during the cooling operation, and a location where the condensed refrigerant flows out from the heat radiating unit 32 during the heating operation. Hereinafter, only the temperature detector 36 is specifically referred to as “refrigerant pipe temperature detector 36”.

  Since the refrigerant in the gas-liquid two-phase state (however, the vaporization has not progressed so much and the liquid-phase refrigerant is abundant) flows through the refrigerant pipe 17 during the cooling operation, in other words, since the gas-liquid phase change of the refrigerant is small, the refrigerant The temperature of the pipe 17 can be handled as the temperature of the heat radiation part 32. On the other hand, during the heating operation, the refrigerant pipe 17 becomes a supercooling part (liquid phase part) of the refrigeration cycle, and liquid refrigerant accumulates, so that the temperature of the refrigerant pipe 17 cannot be immediately handled as the temperature of the heat radiating part 32. However, the surface temperature of the heat radiating section 32 can be obtained from the measured temperature of the refrigerant pipe temperature detector 36 even during the heating operation based on the concept of “correction temperature” described later.

  The attachment position of the refrigerant pipe temperature detector 36 is a relatively higher part of the refrigerant pipe 17 in the casing 31. The reason why such a place is selected as the attachment position of the refrigerant pipe temperature detector 36 will be described later.

  In addition to the refrigerant pipe temperature detector 36, a room temperature detector is disposed on the radiation panel 30. A room temperature detector 38 is disposed at the top of the housing 31, and a room temperature detector 39 is disposed at the bottom of the housing 31. Hereinafter, the room temperature detector 38 is referred to as an “upper room temperature detector 38”, and the room temperature detector 39 is referred to as a “lower room temperature detector 39”. Similar to the temperature detectors 21, 22, 23, 24 and the refrigerant pipe temperature detector 36, the upper room temperature detector 38 and the lower room temperature detector 39 are also composed of thermistors. The upper room temperature detector 38 and the lower room temperature detector 39 are arranged in a place that is not easily affected by the radiant heat of the heat radiating unit 32 and the radiant heat of the refrigerant pipes 17 and 18.

The control unit 40 shown in FIG. 8 controls the overall control of the radiant air conditioner 1. The control unit 40 performs control so that the room temperature reaches a target value set by the user.

  The control unit 40 issues an operation command to the compressor 12, the four-way valve 13, the expansion valve 15, and the outdoor blower 16. The control unit 40 receives output signals of the detected temperatures from the temperature detectors 21 to 24, the refrigerant pipe temperature detector 36, the upper room temperature detector 38, and the lower room temperature detector 39. The control unit 40 refers to the output signals from the temperature detectors 21 to 24, the refrigerant pipe temperature detector 36, the upper room temperature detector 38, and the lower room temperature detector 39, with respect to the compressor 12 and the outdoor fan 16. An operation command is issued, and a state switching command is issued to the four-way valve 13 and the expansion valve 15.

  FIG. 1 shows a state in which the radiant air conditioner 1 is performing a cooling operation (dehumidifying operation) or a defrosting operation. The high-temperature and high-pressure refrigerant discharged from the compressor 12 enters the outdoor heat exchanger 14 where heat exchange with outdoor air is performed. That is, the refrigerant dissipates heat to the outdoor air. The refrigerant that has dissipated heat and is condensed to be liquid is sent from the outdoor heat exchanger 14 to the heat dissipating part of the radiation panel 30 through the expansion valve 15, decompressed and expanded to a low temperature and low pressure, and the surface temperature of the heat dissipating part 32 is lowered. . The heat dissipating part 32 whose surface temperature has dropped absorbs heat from the room air, thereby cooling the room air. After the heat absorption, the low-temperature gaseous refrigerant returns to the compressor 12. The airflow generated by the outdoor fan 16 promotes heat dissipation from the outdoor heat exchanger 14.

  FIG. 2 shows a state where the radiant air conditioner 1 is performing a heating operation. At this time, the four-way valve 13 is switched, and the refrigerant flow is reversed from that during the cooling operation. That is, the high-temperature and high-pressure refrigerant discharged from the compressor 12 enters the heat radiating section 32 where heat exchange with room air is performed. That is, the refrigerant dissipates heat to the room air, and the room air is warmed. The refrigerant that has dissipated heat and is condensed to become liquid is sent from the heat dissipating section 32 to the outdoor heat exchanger 14 through the expansion valve 15, and is decompressed and expanded to lower the surface temperature of the outdoor heat exchanger 14. The outdoor heat exchanger 14 whose surface temperature has dropped absorbs heat from outdoor air. After the heat absorption, the low-temperature gaseous refrigerant returns to the compressor 12. The airflow generated by the outdoor fan 16 promotes heat absorption by the outdoor heat exchanger 14. Frost adhering to the outdoor heat exchanger 14 due to heat absorption is removed by performing a defrosting operation.

  FIG. 9 shows a control flowchart during cooling operation, which is an example of air conditioning operation in which the radiation panel 30 of the radiation type air conditioner 1 serves as an evaporator. After starting the cooling operation, the control unit 40 refers to the output signal of the upper room temperature detector 38 in step # 101. This is because the indoor air circulates as shown in FIG. 11 during the cooling operation, and the air passing through the upper room temperature detector 38 is not affected by the radiant heat of the heat radiating unit 32.

  In the next step # 102, the control unit 40 refers to the output signal of the refrigerant pipe temperature detector 36. In the case of the cooling operation (dehumidifying operation) or the defrosting operation, the temperature detected by the refrigerant pipe temperature detector 36 can be handled as the surface temperature of the heat radiating unit 32, so that the control unit 40 can control the refrigerant pipe temperature detector 36. Reference the output signal without any correction.

  Thereafter, the control unit 40 continues the cooling operation while performing Step # 101 and Step # 102 at a predetermined sampling rate.

  In this way, the control unit 40 does not simply perform the control with reference to only the room temperature, but also performs the control with reference to the temperature of the refrigerant flowing through the heat radiating unit 32, so that the room temperature can be brought closer to the target temperature more quickly. .

  As described above, since the temperature detector 36 is attached to the inside of the casing 31 of the refrigerant pipe 17, whether the refrigerant path of the radiation panel 30 is the refrigerant path during the cooling operation or the refrigerant path during the heating operation. Regardless of, the surface temperature of the radiation panel 30 can be detected at the same position. For this reason, it is not necessary to change the control specifications between the cooling operation and the heating operation.

  During the cooling operation (dehumidifying operation), condensed water is generated in the heat radiating unit 32. Since the refrigerant pipe temperature detector 36 is attached to a relatively upper part of the refrigerant pipe 17 in the housing 31, even if the condensed water in the heat radiating section 32 is accumulated as drain water below the heat radiating section 32 ( The drain water is received by a drain pan 32a << refer to FIG. 11 >> disposed below the heat radiating portion 32) and is not in contact with the drain water. For this reason, there is no need to worry that an error occurs in the temperature detected by the refrigerant pipe temperature detector 36 or that the refrigerant pipe temperature detector 36 breaks down. Although not as much as the heat radiating section 32, condensed water is also generated in the refrigerant pipe 17. However, in order to reduce the influence of the condensed water, it is meaningful to arrange the refrigerant pipe temperature detector 36 in the upper part of the refrigerant pipe 17. It is. In FIG. 1, a refrigerant pipe temperature detector 36 is provided in the refrigerant pipe 17 that passes through the upper frame of the housing 31 above the heat radiating section 32.

  Even when a plurality of heat radiation parts 32 are connected in series as shown in FIG. 4, the refrigerant pipe temperature detection part 36 is arranged in the upper part of the refrigerant pipe 17. When a plurality of heat radiation parts 32 are connected in series, as shown in FIG. 5, the refrigerant pipe temperature detector 36 can be attached to the refrigerant pipe 37 that connects the heat radiation parts 32 to each other in the upper part of the radiation panel 30. Even with this configuration, the refrigerant pipe temperature detector 36 can be protected from condensed water. In short, the fact that the refrigerant pipe temperature detector 36 is arranged at a place where the condensed water hardly occurs is a matter to be protected.

  The control flowchart at the time of the heating operation which is an example of the air conditioning operation in which the radiation panel 30 of the radiation type air conditioner 1 serves as a condenser is shown in FIG. After starting the heating operation, the control unit 40 refers to the output signal of the lower room temperature detector 39 in step # 111. This is because the indoor air circulates as shown in FIG. 12 during the heating operation, and the air passing through the lower room temperature detector 39 is not affected by the radiant heat of the heat radiating unit 32.

  In the next step # 112, the control unit 40 refers to the temperature obtained by adding the correction temperature to the temperature detected by the refrigerant pipe temperature detector 36.

  As described above, the refrigerant pipe temperature detector 36 is disposed in the refrigerant pipe 17 and does not directly detect the surface temperature of the radiation panel 30 (more precisely, the surface temperature of the heat radiating unit 32). Further, the difference between the temperature of the refrigerant pipe 17 and the surface temperature of the radiation panel 30 varies depending on what value the degree of supercooling is. Therefore, during the heating operation, the surface temperature of the radiation panel 30 is predicted by correcting the temperature by predicting the degree of supercooling of the heat radiating unit 32 from the temperature of the refrigerant pipe 17. It is preferable to determine the correction temperature through repeated experiments.

  Thereafter, the control unit 40 continues the heating operation while performing Step # 111 and Step # 112 at a predetermined sampling rate.

Thus, the control unit 40 does not perform the control with reference to only the room temperature during the heating operation,
Since the control is performed with reference to the predicted surface temperature of the radiation panel 30 with high accuracy, in which the temperature is corrected by predicting the degree of supercooling of the heat radiating section 32 from the temperature of the refrigerant pipe 17, the room temperature is made the target temperature more quickly. You can get closer.

  The provision of the upper room temperature detector 38 and the lower room temperature detector 39 as means for measuring the room temperature is the minimum condition and does not limit the invention. A third or higher room temperature detector is disposed at an intermediate height between the upper room temperature detector 38 and the lower room temperature detector 39, and the control unit 40 performs control while referring to the measurement results. It is good as well. Needless to say, the room temperature detectors other than the upper room temperature detector 38 and the lower room temperature detector 39 should also be arranged in a place that is not easily affected by the radiant heat of the heat radiating section 32 and the radiant heat of the refrigerant pipes 17 and 18.

  Up to now, the heat radiation part 32 has been described as being arranged vertically, but a structure in which the heat radiation part 32 is arranged horizontally is also possible. In this case, the heat dissipating fins 34 may be configured by arranging a large number of thin plates perpendicular to the axis of the refrigerant pipe 33 with a space therebetween.

  Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the invention.

  The present invention is widely applicable to a radiant air conditioner.

DESCRIPTION OF SYMBOLS 1 Radiation type air conditioner 10 Outdoor unit 11 Case 12 Compressor 13 Four-way valve 14 Outdoor heat exchanger 15 Expansion valve 16 Outdoor blower 17, 18 Refrigerant piping 30 Radiation panel 31 Housing 32 Heat radiation part 36 Refrigerant piping temperature detection Room 38 Upper room temperature detector 39 Lower room temperature detector 40 Control unit

Claims (2)

In a radiant air conditioner comprising a radiant panel disposed indoors, an outdoor heat exchanger, and a compressor that circulates refrigerant through refrigerant piping through the radiant panel and the outdoor heat exchanger,
The radiation panel has a heat dissipating part disposed in a housing,
An upper room temperature detector is disposed at the upper part of the radiation panel, and a lower room temperature detector is disposed at the lower part of the radiation panel.
Control unit of the air conditioner have line control output signal with reference to the from the upper room detector, or the lower room temperature detector,
A cooling pipe that detects the temperature of the refrigerant pipe in the portion of the casing of the refrigerant pipe connected to the heat radiating portion.
A medium pipe temperature detector is attached,
The control unit performs control with reference to an output signal from the refrigerant pipe temperature detector,
The refrigerant pipe to which the refrigerant pipe temperature detector is attached is a refrigerant pipe for liquid refrigerant.
In addition, during the cooling operation, the control unit uses the temperature detected by the refrigerant pipe temperature detector as the radiation.
The temperature detected by the refrigerant pipe temperature detector during heating operation.
A radiation type air conditioner characterized by referring to a temperature obtained by adding a correction temperature to the surface temperature of the radiation panel . The control unit performs control with reference to an output signal from the upper room temperature detector during cooling operation, and performs control with reference to an output signal from the lower room temperature detector during heating operation. Item 2. A radiant air conditioner according to Item 1.

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