JP2014231922A - Floor panel heat removal system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor panel heat removal system suited for cooling of a floor heating panel by a hot water heating system in summer or the like.SOLUTION: Circulation water in a pipe circulates in a heat source machine 5, a heating-side pipe 8, a selector valve V1, a heat removal-side pipe 8a, a circulation water cooling unit 4, a heat removal-side pipe 8b, a floor panel 6, a heating-side pipe 9, and the heat source machine 5 in this order in a circulation circuit without heating the circulation water. In the circulation water cooling unit 4, cold is applied to the circulation water from the evaporator 3d to be transformed to cold water and the cold water cool a surface of the floor panel 6. Note that no dew condensation is formed on the surface of the floor panel 6 since a freezing capability of a freezing unit 3 is set so that a circulation water temperature is equal to or higher than an indoor dew-point temperature.

Description

  The present invention relates to a floor panel heat removal system suitable for cooling a floor heating panel by a hot water heating system in summer or the like.

  2. Description of the Related Art Conventionally, as a room cooling apparatus using radiant cooling heat, a system that circulates a refrigerant through an internal pipe of a floor heating panel and cools a floor surface or the like in summer is known. Although this system is more comfortable than the method of blowing cold air into the room, there are problems of corrosion of building materials due to condensation and generation of mold when the floor surface temperature falls below the dew point of room air.

As a technique for solving such a problem, for example, a floor panel of Patent Document 1 has been proposed. In the conventional floor panel, a pipe for passing refrigerant is passed through a floor base material such as a plywood pasted on the lower part of the floor material. For this reason, the thermal resistance between the pipe and the floor material surface is increased, and it is necessary to lower the refrigerant temperature accordingly, which tends to cause condensation.
The floor panel according to the same document is a pipe that passes through the surface floor material and distributes the refrigerant, thereby reducing the thermal resistance between the pipe and the floor material surface, and comparing the pipe surface temperature with the conventional one. By increasing the height, condensation on the pipe surface is prevented.

  Further, Patent Document 2 has been proposed as another technique. This is a floor cooling system that circulates the refrigerant of a heat pump air conditioner to the floor panel flow path, detects the surface temperature of the flooring material with an infrared sensor, etc., and controls the cooling capacity so that it always exceeds the dew point temperature. Is.

JP-A-10-176879 JP 2011-174657 A

According to each of the above-mentioned literature techniques, it is possible to prevent floor panel surface condensation. However, the technique of Document 1 is expected to differ from the system based on the conventional floor panel in the circulating hot water temperature during heating, the panel surface temperature distribution, and the like, and there is a problem that it is difficult to cope with.
Moreover, the technique of literature 2 cannot be directly used for the hot water floor heating system which does not use the heat pump system.

The present invention provides a floor heat removal system that can obtain a comfortable heat removal effect without excessively lowering the floor temperature in summer, on the premise of an existing hot water type floor heating system.
The gist of the present invention is as follows. That is, the floor panel heat removal system according to the present invention is:
(1) A floor panel heat removal system in the summer of a hot water floor heating system,
A circulating water circuit that circulates hot water or water in a pipe connecting the heat source machine for hot water heating and the floor panel;
A cold heat generator,
A circulating water cooling section that enables the circulating water to receive the cold generated by the cold heat generator;
A flow path switching means capable of appropriately switching the flow of the circulating water to the circulating water cooling unit side;
Comprising
In summer or the like, the floor panel is allowed to remove heat by passing through the circulating water cooling section without heating the circulating water in the heat source unit.

(2) In the above invention, the cold heat generator is an ammonia absorption refrigeration unit,
The circulating water cooling unit is configured to accommodate an evaporator of the ammonia absorption refrigeration unit.

(3) In the above invention, the circulating water cooling section is a cold storage heat tank that stores a refrigerant therein, and is configured to be able to store the cold generated by the evaporator.

(4) In each of the above-mentioned inventions, the present invention is further characterized by further comprising a cold air fan that allows the circulating water that passes through the circulating water cooling section to exchange heat with room air so that it can be blown as cold air.

  According to the present invention, a conventional floor heating system including a hot water heating heat source unit and a floor panel is provided with a simple structure cooling heat supply device, and comfortable heat removal without excessively lowering the floor temperature in summer. There is an effect that an effect can be obtained.

It is a figure which shows the structure of the floor panel heat removal system 1 by 1st embodiment. It is a figure which shows the circulating hot water flow path at the time of the heating operation of the floor panel heat removal system. It is a figure which shows the circulating water flow path at the time of the heat removal operation | movement of the floor panel heat removal system. It is a figure which shows the structure of the floor panel heat removal system 20 by 2nd embodiment. It is a figure which shows the circulating hot water flow path at the time of the heating operation of the floor panel heat removal system. It is a figure which shows the circulating water flow path in the heat removal operation 1 (floor panel 6 side) of the floor panel heat removal system. It is a figure which shows the circulating water flow path in the heat removal operation 2 (cold air fan 22 side) of the floor panel heat removal system. It is a figure which shows the other usage condition of the cold wind fan.

  Hereinafter, an embodiment of a floor panel heat removal system according to the present invention will be described in more detail with reference to FIGS. In order to avoid redundant description, the same components are denoted by the same reference numerals in the respective drawings. Needless to say, the scope of the present invention is described in the claims and is not limited to the following embodiments.

<First embodiment>
Referring to FIG. 1, a floor panel heat removal system 1 according to an embodiment of the present invention includes a heat source unit 5 and a floor that functions as a heating terminal in winter and as a heat removal terminal in summer. Panel 6, cold supply device 2 for supplying cold water to the circulating water, heating side pipes 8 and 9 directly connecting heat source unit 5 and floor panel 6, and heat removal side pipe 8a detouring to cold heat supply device 2 side A switching valve V1 that can switch the flow of circulating water to the floor panel 6 side or the cold heat supply device 2 side is provided as a main component.

  The heating system of the heat source unit 5 includes a burner 5a, a combustion fan 5b, a heat exchanger 5c, a circulation pump 5d, a control unit 5e that performs operation control, and the like inside the main body. The on-board heating system includes a high-temperature side system, a low-temperature side system, and an on-board circulation circuit, and further has a configuration such as a cistern, but the illustration is omitted. In addition to the heating system, the heat source unit 5 includes a hot water supply system and a bath remedy system, both of which are not shown.

The cold heat supply device 2 includes an ammonia absorption refrigeration unit 3, a circulating water cooling unit 4 that applies cold heat to the circulating water that passes through the heat removal side piping system 8a side, a control unit 7 that performs an operation control command of the system, As a main component.
The circulating water cooling unit 4 includes an evaporator 3d of the refrigeration unit 3 and a coil 4a interposed between the heat removal side pipes 8a and 8b in a hollow box. The evaporator 3d and the coil 4a are in surface contact with each other, and are configured to effectively transfer the cold heat of the evaporator 3d to the coil 4a side.

  The ammonia absorption refrigeration unit 3 is a refrigerator that uses ammonia as a refrigerant and water as an absorbent, and includes a generator 3a, a separator 3b, a condenser 3c, an evaporator 3d, an absorber 3e, and a space between these devices. A pipe 3g to 3m through which an ammonia solution or gas passes is provided as a main configuration. The generator 3a is provided with a heating device (not shown) and configured to be able to heat the internal solution.

  The operation of the refrigeration unit 3 is as follows. The aqueous ammonia solution is heated in the generator 3a, gasified to become a foam, rises, and enters the separator 3b. Here, the ammonia gas having a high purity is cooled by outside air in the condenser 3c and liquefied. The liquefied ammonia is vaporized in the evaporator 3d. At this time, the heat of vaporization is taken away and led from the heat removal side piping system 8a to cool the circulating water flowing in the coil 4a. The ammonia evaporated in the evaporator 3d is absorbed by the ammonia diluted solution flowing down from the separator 3b in the absorber 3e to become a concentrated solution, and returns to the generator 3a. The cooling power supply capacity of the refrigeration unit 3 is set so that the circulating water temperature after cooling is always equal to or higher than the indoor dew point temperature.

The floor panel heat removal system 1 is configured as described above. Hereinafter, modes of the floor panel heat removal system 1 during heating operation and heat removal operation will be described.
(During heating operation)
The operating state of each part during the heating operation is as shown in Table 1. As a result, the hot water produced by the heat source machine is a circuit of the heat source machine 5 → the heating side pipe 8 → the switching valve V1 → the heating side pipe 8 → the floor panel 6 → the heating side pipe 9 → the heat source machine 5 as shown in FIG. It circulates and enables indoor heating by the floor panel 6.

(During heat removal operation)
Next, with reference to FIG. 3, the aspect of the heat removal operation control of the floor panel 6 in summer or the like will be described.
The operating state of each part in this case is as shown in Table 2. As a result, the circulating water in the pipe is not heated, and the heat source unit 5 → the heating side pipe 8 → the switching valve V1 → the heat removal side pipe 8a → the circulating water cooling unit 4 → the heat removal side, as shown in FIG. It circulates in the circulation circuit by the circuit of piping 8b-> floor panel 6-> heating side piping 9-> heat source machine 5. And in the circulating water cooling part 4, cold heat is obtained from the evaporator 3d, it becomes cold water, and the floor panel 6 surface is cooled. However, since the refrigeration capacity of the refrigeration unit 3 is set so that the circulating water temperature is equal to or higher than the indoor dew point as described above, there is no condensation on the panel surface.

<Second Embodiment>
Next, another embodiment of the present invention will be described with reference to FIG. The configuration of the floor panel heat removal system 20 according to the present embodiment is different from the above-described floor panel heat removal system 1 in the configuration of the circulating water cooling unit 21 first. That is, the circulating water cooling unit 21 is configured as a cold storage heat tank filled with a refrigerant (for example, water), stores the cold heat supplied by the refrigeration unit 3 in the refrigerant, and passes through the heat exchange coil 4a. Functions to feed circulating water.

Secondly, in addition to the floor panel 6, a cold air fan 22 including a fin tube 22 a and a fan 22 b is provided in the heat removal piping system. When the circulating water cooled by the circulating water cooling unit 21 passes through the fin tube 22a, the cold air machine 22 is configured to exchange heat with room air and to blow air as cold air by the fan 22b.
Thirdly, it is provided with a switching valve V22 that can switch the supply of the cooling circulating water to the floor panel 6 side or the cold air fan 22 side.
Since the other structure is the same as that of the floor panel heat removal system 1, duplicate description is omitted.

Next, the aspect at the time of the heating operation of the floor panel heat removal system 20 and the heat removal operation will be described.
(During heating operation)
The operating state of each part during the heating operation of this embodiment is as shown in Table 3. As a result, the hot water produced by the heat source machine is, as shown by the thick line in FIG. It circulates in the circuit of 8b → heating side piping 8 → floor panel 6 → heating side piping 9 → heat source unit 5 to enable indoor heating by the floor panel 6.
At that time, when the load on the floor panel 6 is small, the circulating water cooling unit 21 functions as a buffer, and the number of burner combustion ON-OFF operations of the heat source unit 5 can be reduced. Thereby, the thermal efficiency improvement as a system can be aimed at.

  In this embodiment, an example in which the switching valve V1 is opened on the circulating water cooling unit 21 side is shown. However, the floor panel 6 side is opened, and the circulating water cooling unit 21 side is bypassed to the floor panel 6 side directly. It can also be set as the aspect which supplies warm water.

(During heat removal operation 1)
Furthermore, with reference to FIG. 6, the aspect of the heat removal operation control of the floor panel 6 in the summer of this system will be described.
The operating state of each part in this case is as shown in Table 4. Thereby, the circulating water in the piping is not heated, and as shown by the thick line in FIG. 6, the heat source unit 5 → the heating side piping 8 → the switching valve V1 → the heat removal side piping 8a → the circulating water cooling unit 21 → the switching valve V22. It circulates in order of → heat removal side piping 8b → floor panel 6 → heating side piping 9 → heat source unit 5. And in the circulating water cooling part 4, it receives cold heat from the evaporator 3d, becomes cold water, and cools the floor panel 6 surface. However, since the capacity of the refrigeration unit 3 is controlled so that the evaporation temperature becomes equal to or higher than the indoor dew point as described above, there is no condensation on the panel surface.

(During heat removal operation 2)
Next, with reference to FIG. 7, the aspect of the cold wind operation control by the cold wind fan 22 is demonstrated.
The operating state of each part in this case is as shown in Table 5. As a result, the circulating water in the pipe is not heated, and the heat source unit 5 → the heating side pipe 8 → the switching valve V1 → the heat removal side pipe 8a → the circulating water cooling unit 21 → the switching valve V22 as shown by the thick line in FIG. It circulates in order of → heat removal side pipe 22c → cold air fan 22 → heat removal side pipe 22d → heating side pipe 9 → heat source unit 5. Thereby, cold air is supplied by operating the fan of the cold air fan 22.

  In the present embodiment, the configuration example is shown in which only one of the floor panel 6 and the cold air fan 22 can be used by switching the flow path by the switching valve V22. However, as shown in FIG. Is provided with a coil 23a in addition to the coil 4a, and an independent cold water circulation circuit 22d and a circulation pump 22e attached to the cold air fan 22, so that the floor panel 6 and the cold air fan 22 can be used simultaneously. .

  The present invention can be widely applied to a refrigerant circulation type floor heating system regardless of the type of heat source and circulating refrigerant.

DESCRIPTION OF SYMBOLS 1,20 .... Floor panel heat removal system 2 .... Cold heat supply device 3 .... Ammonia absorption refrigeration unit 3d ... Evaporator 4, 21, 23 ... Circulating water cooling unit 5 .... Heat source machine 7 ... Control unit 22 ... Cold air fan V1, V22 ... Switching valve

Claims (4)

A floor panel heat removal system in the summer of a hot water floor heating system,
A circulating water circuit that circulates hot water or water in a pipe connecting the heat source machine for hot water heating and the floor panel;
A cold heat generator,
A circulating water cooling section that enables the circulating water to receive the cold generated by the cold heat generator;
A flow path switching means capable of appropriately switching the flow of the circulating water to the circulating water cooling unit side;
Comprising
A floor panel heat removal system characterized in that the heat removal from the floor panel can be performed by passing through the circulating water cooling section without heating the circulating water in the heat source unit in summer and the like. The cold heat generator is an ammonia absorption refrigeration unit;
The floor panel heat removal system according to claim 1, wherein the circulating water cooling unit accommodates an evaporator of the ammonia absorption refrigeration unit.   The floor panel heat removal system according to claim 2, wherein the circulating water cooling unit is a cold storage heat tank that stores a refrigerant therein, and is configured to be able to store the cold generated by the evaporator.   The floor panel according to any one of claims 1 to 3, further comprising a cold air fan that allows the circulating water passing through the circulating water cooling unit to exchange heat with room air so that the air can be blown as cold air. Heat removal system.

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