JP3340989B2 - Floor heating evaluation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor heating evaluation apparatus capable of estimating and evaluating a floor contact temperature during floor heating.

[0002]

2. Description of the Related Art Floor heating has a small vertical temperature distribution, is a comfortable heating system that is suitable for so-called head and foot heat, and there are various types. In addition, floor heating requires that the floor surface that the human body is in direct contact with is heated, and that thermal comfort can be obtained even at a relatively low room temperature due to heat radiation from the floor surface. Since the heat loss of the building must be small in order to achieve heating, floor heating is naturally a heating method with low energy consumption. Needless to say, floor temperature is a major index in the design and evaluation of floor heating, although there are many studies on the optimal and upper limit values of floor temperature, but there are considerable differences in the values depending on researchers and research methods. Therefore, the standard value of the floor temperature during floor heating is not very clear. One reason for this is that the meaning of bed temperature is unclear. That is, the floor temperature includes (a) the floor surface temperature (the surface temperature of the exposed floor) and (b) the floor contact temperature (the boundary surface between the human body and the floor when a part of the human body such as a foot is in contact). Temperature). The floor surface temperature is an element that determines the amount of heat supplied from the floor surface to the room from the viewpoint of energy balance, and is one of the elements that form a radiation environment from the viewpoint of thermal physiology. The floor contact temperature is a human body surface temperature at a contact portion and is a very important factor in evaluating the comfort of floor heating and the safety against low-temperature burns. In the design of floor heating as a heat supply system, it is thought that there will be no major problem by treating only the floor surface temperature, but floor heating from the side of thermal physiology and psychology considering the comfort and safety of floor heating. It is clear that not only floor surface temperature but also floor contact temperature is important for design and evaluation. In particular, when discussing safety against low-temperature burns, the floor contact temperature must be considered.

[0003]

However, since the floor contact temperature is affected by various uncertain factors such as the physiological condition of the human body, the contact site, the contact pressure, and the contact time, it is difficult to treat it as an evaluation index. In fact, it is difficult to collect general data. However, if a device that can estimate the floor contact temperature by physical measurement is developed, it will be necessary to consider the floor contact temperature as one of the floor heating design criteria, and to evaluate comfort and safety with higher accuracy. It becomes possible. Accordingly, the present invention has been made in view of such circumstances, and its purpose is to estimate and evaluate the floor contact temperature during floor heating with the aim of rational design and evaluation of the floor heating system. It is an object of the present invention to provide a floor heating evaluation device that can be used.

[0004]

In order to achieve the above object, an apparatus for evaluating floor heating according to the present invention has a floor mounting surface which is mounted on the surface of a floor in which a heating facility is incorporated, and has an interior. A main body filled with a constant temperature liquid maintained at a predetermined temperature, a body tissue assumed layer provided between the constant temperature liquid in the main body and the floor mounting surface, and simulating a human body tissue, and the floor mounting surface A simulated garment layer provided between the simulated garment layer and the floor surface, and a temperature measuring device for measuring a temperature of a contact point between the simulated garment layer and the floor mounting surface.

[0005] In the floor heating evaluation apparatus of the present invention, it is preferable that the constant temperature liquid in the main body is guided to the outside of the main body and then returned to the main body to stir the constant temperature liquid. It is preferable that the body tissue assumed layer is silicone. Preferably, the simulated clothing layer is a felt.

[0006]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In FIG. 1, reference numeral 1 denotes a floor heating evaluation device (EFCT) for measuring an estimated floor contact temperature of a floor 2 incorporating a heating facility (hot water or an electric floor heating system or the like).
(Estimated Floor Contact Temperature) meter).
The shape and size of the main body 3 of the EFCT meter 1 are not particularly limited, and are formed in a box shape such as a vertical cubic shape or a cylindrical shape. Specifically, it is formed, for example, into a 2 mm thick acrylic cube (outer shape: 100 × 100 × 100 mm). The bottom surface of the main body 3 is formed as a floor mounting surface 4 mounted on the floor surface. Bottom of main body 3 (part in contact with floor mounting surface 4)
Is provided with a body tissue assumption layer 5 simulating (assuming) a human body tissue. The body tissue assumption layer 5 is not particularly limited as long as it simulates (assumes) a tissue of a human body, and specific examples thereof include silicone such as silicone rubber. The thickness of the body tissue assumed layer 5 is not particularly limited, but is preferably 5 to 30 mm, and particularly preferably 10 mm.

The main body 3 is filled with a constant temperature liquid (for example, water) 6. Further, the main body 3 includes a heater as a heater for heating the constant temperature liquid 6, specifically, a sheath heater 7,
A temperature sensor 8 for measuring the temperature of the constant temperature liquid 6 is provided, and the heater 7 and the temperature sensor 8 are connected to a temperature controller 9. The temperature controller 9 controls the power supply to the heater 7 based on the measured temperature from the temperature sensor 8 to maintain the temperature of the constant temperature liquid 6 in the main body 3 at a predetermined temperature, for example, 37.0 ° C. The temperature controller 9 may have any structure as long as it can maintain the temperature of the constant temperature liquid 6 at a predetermined temperature. For example, the temperature controller 8 measures the temperature of the constant temperature liquid 6 with the temperature sensor 8, and the measured temperature is kept constant. The power supplied to the heater 7 may be controlled by an SSR (Solid State Relay).

The main body 3 has a constant temperature liquid 6 in the main body 3.
A stirrer 10 for stirring the constant temperature liquid 6 may be provided so that the temperature distribution in FIG. The stirrer 10 may be of any type and is not particularly limited. For example, a propeller-shaped stirring blade may be rotatably provided in the main body 3. Preferably, as shown, a circulation tube 11 extending outside the body 3
And a pump, for example, a hot water pump 12, provided in the middle of the circulation pipe 11 to form the stirrer 10,
By driving the pump 12, a part of the constant temperature liquid 6 in the upper part of the main body 3 is sucked into the circulation pipe 11, guided to the outside of the main body 3, and then again from the circulation pipe 11 into the main body 3 via the pump 12. It is to be returned. By configuring the stirrer 10 in this manner, since the circulation pipe 11 is provided outside the main body 3, the heat radiation of the constant temperature liquid 6 is promoted, and the temperature inside the main body 3 is stably made uniform. It becomes possible to.

A simulated clothing layer 13 is provided on the floor mounting surface 4 of the main body 3 so as to cover the mounting surface 4, and the main body 3 (floor mounting surface 4).
Is brought into contact with the floor surface 2a (when the main body 3 is placed on the floor surface 2a), the simulated clothing layer 13 is interposed between the floor placement surface 4 and the floor surface 2a. The simulation clothing layer 13
It simulates (assumes) clothing worn by a person, and may be anything worn by a person, for example, felt, cloth, and the like. Can be performed uniformly and well. The thickness of the simulated garment layer 13 is arbitrarily selected from the range in which the thickness of clothes and the like can be taken.

[0010] Between the floor mounting surface 4 of the main body 3 and the simulated clothing layer 13, a temperature measuring device 14 for measuring the temperature of the contact point between the floor mounting surface 4 and the simulated clothing layer 13 is provided. . The temperature measuring device 14 is not particularly limited, but is preferably a device capable of measuring the temperature at the center (point) of the contact point. Specifically, for example, the floor mounting surface 4 and the simulated clothing layer 1
The EFCT thermocouple 15 is provided between the thermocouple 15 and the thermocouple 15. The thermocouple 15 is connected to the thermocouple 15. The thermometer 15 displays and records the measured temperature based on the output from the thermocouple 15. You may do it.

In addition, a liquid temperature measuring device 17 for measuring the temperature of the constant temperature liquid 6 near the body tissue assumed layer 5 is provided in the main body 3. As the liquid temperature measuring device 17, it is preferable to use the same type of temperature measuring device as the temperature measuring device 14. For example,
When the temperature measuring device 14 is composed of an EFCT thermocouple 15 and a temperature measuring device 16, a thermocouple 18 for measuring a liquid temperature, which is the same as the EFCT thermocouple 15, is provided in the main body 3. The temperature measuring device 16 is connected.
The position of the thermocouple for liquid temperature measurement 18 (liquid temperature measuring device 17) is not particularly limited as long as it is near the body tissue assumed layer 5, and for example,
A position separated from the upper surface of the body tissue assumed layer 5 by 1 to 30 mm is preferable. By providing the liquid temperature measuring device 17 in this way, it is possible to confirm whether the temperature of the constant temperature liquid 6 is maintained at a desired temperature, and to actually determine the temperature based on the measurement result of the temperature measuring device 17. It is possible to estimate the instantaneous value of the heat flow flowing into the human body from the floor surface 2a and the time integral value of the amount of heat, which is a measure for improving floor heating and the like.

In order to evaluate the floor heating using the EFCT meter 1, for example, the floor heating is turned on (operated) and waits until the temperature of the floor surface 2a is stabilized. The EFCT meter 1 is controlled by the temperature controller 9 while the lower surface of the simulated clothing layer (felt) 13 of the main body 3 is open to the atmosphere.
The temperature of the constant temperature liquid (for example, water) 6 is maintained at a predetermined temperature, for example, 37.0 ° C. When the temperature between the floor placing surface 4 and the simulated clothing layer 13 and the temperature of the water 6 near the body tissue assumed layer 5 are stabilized, the main body 3 is moved to a desired position on the floor surface 2a (estimating the floor contact temperature). At the position you want). After placing, E
By measuring the temperature of the contact surface between the floor placing surface 4 and the clothing layer 13 with the FCT thermocouple 15, the floor contact temperature (estimated floor contact temperature close to the human body floor contact temperature) can be accurately measured. . That is, the EFCT meter 1 simulates a human body because the water 6 in the main body 3 is maintained at 37.0 ° C. close to the body temperature and the body tissue assumption layer 5 supposing the tissue of the human body is provided. It has a structure. In addition, unlike the soles, relatively soft parts such as the buttocks and crotch, etc., which are likely to cause low-temperature burns due to contact with the floor 2, wear ordinary clothes, etc. Since there is almost no direct contact with the floor 2 without any intervention, the provision of the simulated clothing layer 13 provides a structure closer to the state where the human body comes into contact with the floor 2. Furthermore, the most important factor in the comfort of floor heating and low-temperature burns is the surface temperature of the skin, and the floor mounting surface 4 corresponding to the surface of the skin.
Since the temperature of (upper portion of the simulated clothing layer 13) is measured, it is possible to measure the estimated floor contact temperature in a state close to the floor contact temperature of the human body.

Next, an accuracy confirmation test was performed on the EFCT meter 1 of the present invention. The test method is such that four subjects A, B, C, and D are cross-legged on the floor surface on which a hot water floor heating system in which a plurality of hot water panels are connected in parallel is operated.
After sitting for 0 minutes, the skin temperature at the approximate center of the right buttocks in contact with the floor was measured at 1 minute intervals. At the same time, the following EFCT meter of the present invention is placed, and the temperature of the contact point (the upper surface of the felt) between the floor placing surface and the simulated garment layer is similarly set to 1.
Measured at minute intervals. The position and EF of the four subjects
The placement position of the CT meter was set to the same position on each of the five hot water panels so that the same conditions were satisfied. The measured temperature value is 5 times before and after the temperature of the hot water in
The average value of 11 measured values in 10 minutes measured in 10 minutes was obtained, and the highest value among the obtained measured values was shown in Table 1.
It was shown to. This test was performed three times, and the results are shown in Table 1. The third test was performed on three subjects A, B, and C. For comparison, EFCT meter (simulated clothing layer)
The temperature of the contact point between the floor and the floor (the lower surface of the felt) was determined in the same manner as described above, and the results are shown in Table 1. [EFCT meter] BOX (100 × 100 ×) made of acrylic resin with a thickness of 2.0 mm
100) Simulated clothing layer Felt (Product name: Toyobo Spunbond 4301N) Material: 100% polyester Thickness: 2.7mm Body tissue assumed layer Silicone rubber (Product name: Toshiba Silicone YE5822)
) Thickness: 10mm Constant temperature liquid Water Temperature: 37.0 ° C

[0014]

[Table 1]

Next, based on the results in Table 1, the relationship between the felt upper surface temperature and the human body floor contact temperature is shown in FIG. 1, and the relationship between the felt lower surface temperature and the human body floor contact temperature is shown in FIG. The 45 ° straight line in the drawing is a straight line indicating a condition under which both temperatures match. In the case shown in FIG. 1 using the EFCT meter of the present invention, the upper limit temperature of the individual difference is on a straight line of 45 °, and the maximum value of the floor contact temperature (the floor contact temperature is likely to be high,
It is possible to accurately measure the low-temperature burn contact temperature of a person who has a high risk of burns. On the other hand, in the case of the felt lower surface temperature, the points plotted from the 45 ° straight line are all separated downward, indicating that the accuracy is poor.

As described above, the estimated floor contact temperature can be accurately measured, that is, the floor contact temperature can be accurately estimated, so that accurate evaluation of floor heating can be performed. Further, by providing the same thermocouple 18 for measuring the liquid temperature as the EFCT thermocouple 15 as the liquid temperature measuring device 17, it is possible to confirm whether the temperature of the water 6 is maintained at a desired temperature, and to perform accurate measurement. You can do it. Further, it is possible to estimate the instantaneous value of the heat flow flowing into the human body from the floor surface 2a and the time integral value of the heat quantity from the EFCT thermocouple 15 and the thermocouple 18 for measuring the liquid temperature, and it is easy to improve the floor heating and the like. Can be done. Therefore, by using the EFCT meter 1 of the present invention, it is possible to simultaneously estimate the temperature and the calorific value, which are important for determining whether or not a low-temperature burn (low-temperature burn) has occurred. In addition, since the temperature is measured only at two points, the floor mounting surface 4 of the main body 3 and the temperature of the water 6 near the body tissue assumed layer 5, the mechanism is simplified and the manufacture of the device is easy. At the same time, failures are unlikely to occur. Furthermore, when only the floor contact temperature is measured, the mechanism is further simplified because the temperature measurement point is only one point on the surface of the floor mounting surface 4.

[0017]

In summary, according to the present invention, the floor contact temperature during floor heating can be accurately estimated, and a rational design and evaluation of the floor heating system can be achieved.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an example of a floor heating evaluation device of the present invention.

FIG. 2 is a diagram showing a relationship between a felt upper surface temperature and a human body floor contact temperature.

FIG. 3 is a diagram showing a relationship between a felt lower surface temperature and a human body floor contact temperature.

[Explanation of symbols]

 Reference Signs List 1 Floor heating evaluation device (EFCT meter) 2 Floor 2a Floor surface 3 Main body 4 Floor mounting surface 5 Body tissue assumed layer 6 Constant temperature liquid 7 Seeds heater (heater) 8 Temperature sensor 9 Temperature controller 10 Stirrer 11 Circulation pipe 12 Hot water Pump 13 Simulated clothing layer 14 Temperature measuring device 15 EFCT thermocouple 16 Temperature measuring device 17 Liquid temperature measuring device 18 Thermocouple for measuring liquid temperature

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-8-47484 (JP, A) JP-A-5-18591 (JP, A) JP-A-2-122247 (JP, A) JP-A-60-1985 209157 (JP, A) JP-A-9-42697 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01K 1/00-19/00 F24D 1/00-3/16 G01N 25/18 G01N 25/62

Claims (1)

(57) [Claims] 1. A main body having a floor mounting surface mounted on a surface of a floor incorporating a heating facility, wherein a main body filled with a constant temperature liquid maintained at a predetermined temperature, and a constant temperature liquid in the main body are provided. Provided between the floor mounting surface and the floor mounting surface, and a body tissue assumed layer simulating human body tissue; a simulated clothing layer provided between the floor mounting surface and the floor surface; An evaluation device for floor heating, comprising: a temperature measuring device for measuring a temperature of a contact portion with a placement surface.