JPH1163525A - Water leakage inspection method for circulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a more accurate water leakage inspection method for each circuit of a circulator having a warming circuit to be coupled with various radiators for hot water warming and/or a bath circuit to be coupled with a bathtub. SOLUTION: A warming circuit and/or a bath circuit are formed as closed circuits not opened to the atmosphere. Upon elapsing a predetermined time after a specified water pressure PH is applied to the closed circuit, water pressure P in the closed circuit is compared with a preset reference level PL. If P>=PL, water pressure drop rate α is examined and a decision is made that water leakage is not present only when the water pressure drop rate αis lower than a preset threshold level Ka (α<=Ka).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating circulating device connected to various radiators for hot water heating, a bath circulating device connected to a bathtub, or a heating circulating device with a bath circulating device provided with both. The present invention relates to a water leakage inspection method for inspecting the presence or absence of water leakage of a pipe constituting the above.

[0002]

2. Description of the Related Art A conventional heating and circulating apparatus with a bath circulating apparatus has a configuration shown in FIG. 6, which will be described below as a representative example. Note that the heating circulation device alone or the bath circulation device alone is an extract of a part of the functions of the following heating circulation device with a bath circulation device, and thus the description thereof is omitted.

This heating circulation device with a bath circulation device is provided with a hot water supply circuit A, a heating circuit B, a bath circuit C, and a drop-in circuit D. Have. Incidentally, above the broken line in the figure is the lower inside than the broken line of the device body Z ₀ corresponding respectively to the outside of the apparatus main body Z _0.

The above hot water supply circuit A includes a hot water supply heat exchanger 14 heated by a gas burner (not shown), and a water supply temperature sensor 12 for detecting a water supply temperature and a water supply amount detection device are provided on the water supply side of the heat supply heat exchanger 14. A water temperature sensor 15 for detecting the temperature of hot water from the hot water supply heat exchanger 14, a water flow servo valve 1 for limiting the hot water output, a bathtub 10 to be described later, A hot water supply temperature sensor 16 for detecting the hot water supply temperature is provided, and a bypass valve 11 is disposed in the middle of a bypass path that short-circuits the incoming and outgoing sides by bypassing the hot water supply heat exchanger 14. It is configured.

Moreover, the heating circuit B, for example, floor heating panel, relative to the radiator 20 for various hot water heating such Fankon vector, device body Z ₀ the fittings 28a, 28
b and external piping 29a, which is constituted by connecting through a 29 b, the device body Z ₀ internal heating circuit B,
A heating circulation pump 31, a heating heat exchanger 22 heated by a gas burner (not shown), a tapping temperature sensor 23 for detecting a tapping temperature from the heating heat exchanger 22, an expansion tank 21 for always ensuring a constant water volume, and a bath reheating Bath heater 24, bath heat valve 32, and bypass passage 25 are provided.

The expansion tank 21 is provided with a water level electrode 46 for detecting a water level, and one ends of a water supply pipe 48 and an overflow pipe 45 are connected to each other.
The other end of 8 is connected to the water inlet side of the hot water supply circuit A, and the other end of the overflow pipe 45 is open to the atmosphere. Further, in the middle of the water supply pipe 48, the vacuum breaker 2
7, a rehydration valve 30 and a check valve 47 are provided.

Further, manual valves 60a and 60b for maintenance and inspection are provided in the middle of each of the external pipes 29a and 29b, and various radiators are provided in the middle of the external pipe 29a to the radiator 20. A plurality of thermal valves 33 are provided for connection of 20.

Normally, the manual valves 60a and 60b are opened except during maintenance and inspection, and among the plurality of thermal valves 33, the thermal valve 33 to which the radiator 20 is actually connected is opened. However, those where the radiator 20 is not connected are:
It is always closed by a stopper plug (not shown).

The bath circuit C connects the apparatus main body Z ₀ to the connection fitting 9.
a, 9b and external pipe 26a, which is constructed by connecting the circulation fitting 7 provided in the bathtub 10 through 26b, the device body Z ₀ internal bath circuit C, the bath heater 24 is connected to the middle In addition, a pressure sensor 5 for detecting the water level in the bathtub 10, a bath circulation pump 3, a water flow switch 6 for detecting the presence or absence of hot water circulation in the bathtub 10, and a bath temperature sensor 19 for detecting the temperature of the bathtub 10 are provided. It is also possible to provide a bath heat exchanger in the bath circuit C without providing the bath heater 24 and directly heat the gas using a gas burner.

The drop circuit D connects between the hot water supply circuit A and the bath circuit C, and drops hot water from the hot water supply circuit A into the bathtub 10 via the bath circuit C. A vacuum breaker 17, a drop valve 2, and a check valve 18 are provided.

The operation of the above configuration will be described.

In the case where heating is performed by supplying hot water to the radiator 20, in this case, the gas burner is burned to heat the heating heat exchanger 22 and the heating circulation pump 31 is driven by the control of a controller (not shown). is, after being heated in the heating heat exchanger 22 hot water in the expansion tank 21 is flow out in the heating circulation pump 31, the device body Z ₀ device from the inner side body Z ₀ is external side forward external piping 29a, radiator 20, is circulated sequentially via the return external pipe 29b.

In this case, since the bath heat valve 32 is closed, it does not flow in the bath heater 24.

When the water level electrode 46 detects that the amount of hot water in the expansion tank 21 has become smaller than a predetermined amount due to evaporation or the like, the water supply valve 30 is opened, and the hot water supply circuit A is opened.
Water from the side is supplied to the expansion tank 21 via the refilling pipe 48.
It will be rehydrated inside.

In the case of bath reheating In this case, under the control of a controller (not shown), all the heat operated valves 33 are closed on the heating circuit B side, the gas burners are burned, and the heating heat exchanger 22 is heated. At the same time, the heating circulation pump 31 is driven, and the bath heat valve 32 is opened. At the same time, on the bath circuit C side, the bath circulation pump 3 is activated, and the hot water in the bathtub 10 is circulated through the bath circuit C.

Thus, on the heating circuit B side, the hot water in the expansion tank 21 flows out of the heating circulating pump 31 and is heated in the heating heat exchanger 22, and then from the bath heater 24, the bath heat valve 32 is expanded. Circulated via the tank 21. Then, when passing through the bath heater 24, the hot water flowing in the bath circuit C is heated, and the bath water stored in the bath 10 is reheated.

When the radiator 20 is used at the same time, the heat valve 33 is opened, the hot water heated by the heating heat exchanger 22 is branched and passes through the bath heater 24, and in the same manner as described above. the apparatus main body Z ₀ is external side forward external piping 29a, the radiator 20 is circulated via a return external piping 29b sequentially.

In the case where hot water is dropped into bathtub 10 In this case, hot water adjusted to a predetermined temperature in hot water supply circuit A is supplied into bathtub 10 through drop circuit D and bath circuit C.

By the way, tub 10 by using the case where newly installing a bathtub 10 and the radiator 20 with the apparatus main body Z _0, the device body Z ₀ the external piping 26a, 26b, 29a, and 29b, etc.
Or the radiator 20, but at this time, it is necessary to inspect the piping system for water leakage. In particular, external piping 29a, 29b for connecting to the radiator 20
It is important to inspect whether there is any water leakage after construction because the wire is often drawn for a long time.

For this reason, in the prior art, after the completion of piping work, a water leak test is performed as follows.

For example, in the case of a water leak inspection on the radiator 20 side, first, a predetermined portion of each of the external pipes 29a and 29b is removed by using a manually-pressed pressure pump 70 and a pressure gauge 72, and then, The pressurized pump 70 is connected to the external pipe 29a on the outgoing side, and the external pipe 29 on the return side is connected.
A stop valve (not shown) is attached to b.

Then, with the closing valve first opened, the pressurizing pump 70 is manually operated to evacuate the air in the piping, then the closing valve is closed and the pressurizing pump 70 is operated again to operate the piping. Apply the specified water pressure inside. After a lapse of a predetermined time (for example, two to three minutes), a change with time of the water pressure is checked by the pressure gauge 72 to check whether or not water leakage has occurred in the piping.

[0023]

However, as described above, in the water leak inspection after the completion of the plumbing work, after the water pressure is applied to the inside of the pipe by using the hand-pressed pressure pump 70,
In the method of visually observing the change of the pressure gauge 72 to determine the presence or absence of water leakage, it is unclear whether the pressure drop immediately after completion of pressurization is due to water leakage, and it takes a little time after completion of pressurization. Even if the determination is started after this, there is a possibility that the determination result of the water leak will be inaccurate due to individual differences in how to set the time.

The present invention has been made to solve the above problems, and has as its object to provide an inspection method capable of determining the presence or absence of water leakage more accurately than in the past.

[0025]

In order to solve the above-mentioned problems, the present invention comprises a heating circuit connected to various radiators for hot water heating and / or a bath circuit connected to a bathtub. In a method for inspecting water leakage in a circulating apparatus, the following means are employed.

[0026] That is, in the first aspect of the present invention, the heating circuits and / or the bath circuit formed as a closed circuit which is not open to the atmosphere, a predetermined pressure P _H for the closed circuit
After a lapse of a certain time from the addition of the pressure, the hydraulic pressure P in the closed circuit is compared with a preset reference value P _L, and if P ≧ P _L ,
Further, the water pressure drop rate α is checked, and it is determined that there is no water leakage only when the water pressure drop rate α is equal to or less than a predetermined threshold value Ka (α ≦ Ka).

According to the second aspect of the present invention, the heating circuit and / or the bath circuit is formed as a closed circuit which is not released to the atmosphere, and after applying a predetermined water pressure P _N to the closed circuit, the closed circuit is closed. The hydraulic pressure decrease rate α is checked, and the time T remaining until the hydraulic pressure decrease rate α reaches the preset reference value Kb is measured. The measured time T is set to the preset reference value T.
If h or less (T ≦ Th), it is determined that there is no water leakage.

[0028] In the invention of claim 3, wherein, after the heating circuit and / or bath circuit formed as a closed circuit which is not open to the atmosphere, plus the predetermined pressure P _H for the closed circuit, the closed circuit The water pressure drop rate α is checked, and the time T until the water pressure drop rate α reaches a preset reference value Kb.
And the measurement time T is set to a preset reference value Th.
If (T ≦ Th) or less (T ≦ Th), the hydraulic pressure reduction amount ΔPs within a certain time Ts is further obtained, and the hydraulic pressure reduction amount ΔPs is compared with a preset threshold value Kc to determine the hydraulic pressure reduction amount ΔPs. It is determined that there is no water leakage only when the value is equal to or smaller than (ΔPs ≦ Kc).

According to the fourth aspect of the present invention,
3. The method according to claim 3, wherein the threshold values Ka and Kc for determining the presence or absence of water leakage are set in multiple stages.

According to a fifth aspect of the present invention, in the method of the fourth aspect, each of the threshold values K divided into multiple stages is set.
The determination of the presence or absence of water leakage based on the comparison between a and Kc is performed simultaneously and in parallel.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing a configuration of a heating circulation device with a bath circulation device according to an embodiment of the present invention.
Portions corresponding to the conventional example shown in FIG. 6 are denoted by the same reference numerals.

[0032] In this embodiment, in the apparatus main body Z _1, edge cutting valve 34, 35 is provided around the pipe connected to the expansion tank 21 of the heating circuit B, also connects the external tube 29b of the return side The pressure relief valve 50 is connected to the connection fitting 28b.
Is provided.

At the time of the water leak inspection, the adapter 4 is attached to the circulation fitting 7. This adapter 4
As shown in FIG. 2, the external piping 26a, 26b of the bath circuit C
Is short-circuited without opening the inside of the bathtub 10, and the adapter 4 is provided with a pressure safety valve 57.

In the case of a water leak inspection, the bath circuit C
One end of the branch pipe 53 is connected to the connection fitting 9a on the outgoing side, and the other end of the branch pipe 53 is connected to one thermal valve 33 provided on the external pipe 29a on the outgoing side of the heating circuit B.

The other configuration is the same as that of the conventional example shown in FIG. 6, and a detailed description is omitted.

Next, a method for performing a water leak test in the configuration shown in FIG. 1 will be described. In this case, control such as opening and closing of each valve is performed by a controller (not shown).

First, a procedure for applying a predetermined water pressure to the heating circuit B and the bath circuit C will be described.

First, with the drop valve 2 of the drop circuit D closed and the water amount servo valve 1 of the hot water supply circuit A closed, the expansion tank 2 is closed.
The front and rear cutoff valves 34 and 35 are closed to bring the bath circuit C and the heating circuit B into communication via the branch pipe 53.

Next, after the drop valve 2 of the drop circuit D is opened, the water amount servo valve 1 of the hot water supply circuit A is gradually opened in order to avoid sudden application of water pressure to the heating circuit B and the bath circuit C. And the water pressure of the tap water passing through the hot water supply circuit A is applied to the inside of the bath circuit C via the drop circuit D, and the branch pipe 53
Through the heating circuit B.

However, in this case, since the front and rear cutoff valves 34 and 35 of the expansion tank 21 are closed, no water pressure is applied to the inside of the expansion tank 21. Each circuit B,
Since the air in the pipe C is discharged through the pressure relief valves 50 and 57, the pipe is reliably filled with water.

[0041] Then, while missed excess pressure in the pressure relief valve 50, 57 to the water pressure P detected by the pressure sensor 5 of the bath circuit C has been previously adjusted to a predetermined value P _H, the amount of water of the hot water supply circuit A Servo valve 1 and drop valve 2 are both fully closed. Thereby, the bath circuit C and the heating circuit B are formed as one closed circuit.

(1) Method of Determining Water Leakage in Heating Circuit B and Bath Circuit C (Part 1) External Pipes 29a, 29b, 26a, 26b of Each Circuit B, C
Is made of a resin such as heat-resistant polyethylene in some cases.
Is gradually reduced irrespective of the presence or absence of water leakage due to the expansion of the pipes of the circuits B and C, but if there is water leakage in the pipes, the degree of water pressure drop increases.

Therefore, as described above, a predetermined hydraulic pressure P is applied to one closed circuit including the bath circuit C and the heating circuit B.
_{When H} is added (time t ₀ ), instead of immediately judging a water leak, as shown in FIG. 3 (a), wait until a certain time (several minutes to tens of minutes) elapses, and Time t ₁ after the expiration of the period
To be compared with a preset reference value P _L water pressure P in the closed circuit.

[0044] Then, if P <P _L, since the degree of pressure reduction is presumed to be large leak, failure and determines (the curve indicated by symbol F ₃ in FIG. 3 (a)) .

On the other hand, if P ≧ P _L , FIG.
, The change ΔP of the water pressure P per unit time Δt
The hydraulic pressure drop rate α (= ΔP / Δt), which is the ratio of the pressure drop, is checked, and the hydraulic pressure drop rate α at that time is compared with a preset threshold value Ka.

If the water pressure drop rate α is larger than the threshold value Ka (α> Ka), it is determined that the degree of water pressure drop is still large and there is water leakage, so that rejection is performed. 3 the curve indicated by symbol F ₂ of (a)).

On the other hand, the water pressure drop rate α is
In the case of a or less (α ≦ Ka), the degree of water pressure drop is small, and it is estimated that there is no water leakage due to only pipe expansion,
Judged as acceptable (the curve indicated by symbol F ₁ of Figure 3 (a)).

The controller (not shown) informs the inspector of the success or failure by using a buzzer, a lamp, or the like.

Thus, the heating circuit B and the bath circuit C
Can be determined more accurately than before.

In order to form the bath circuit C and the heating circuit B as one closed circuit, first, a predetermined hydraulic pressure P _H
Even attempt to make, if not reach the pressure P _H is not a minor water leaks, such as loosening of the packing or the like of the pipe is considered to be the major water leak, such as a pipe is out occurs Therefore, it is a rejection judgment as a matter of course.

(2) Method of Determining Water Leakage in Heating Circuit B and Bath Circuit C (Part 2) In addition to the method of judging water leak described in the above (1), judgment of the presence or absence of water leak is performed as follows. It is also possible to do.

[0052] As described above, if plus the predetermined pressure P _H for one closed path including the bath circuit C and heating circuit B (time t _0), pressure reduction rate in the closed circuit from that point is checked, and the water pressure drop rate α is set to a predetermined reference value K.
The time T until reaching b is measured.

[0053] For example, in FIG. 4 (a), the curve indicated by symbol F _1, when the time until pressure drop rate α reaches the reference value Kb is the curve indicated by T _1, reference numeral F ₂ is , The time until the water pressure drop rate α reaches the reference value Kb is T ₂ ,
If the curve indicated by _3, the time until the pressure drop rate α reaches the reference value Kb is _{T 3, F 1 → F 2} → F 3 and the degree of pressure reduction increases, reaches the reference value Kb (T ₁ <T ₂ <T ₃ ).

Therefore, when the measurement time T (T ₁ , T ₂ , T ₃ ) exceeds the preset reference value Th (T> Th), it is estimated that the water pressure is greatly reduced and there is a water leak. Therefore, it is determined that failure (the curve indicated by symbol F ₃ in FIG. 4 (a)), the other is acceptable.

That is, the water pressure drop rate α falls within the reference value Th.
Passes if it reaches the reference value Kb, and fails if it does not.

(3) Method of judging water leakage in heating circuit B and bath circuit C (part 3) In the method of (2) above, when a more severe inspection is performed, if T ≦ Th, the test is started, As shown in FIG. 4 (b), the water pressure drop amount ΔPs within a predetermined time Ts (about several minutes) is obtained, and this water pressure drop amount ΔPs is compared with a preset threshold value Kc.

If the water pressure drop amount ΔPs is larger than the threshold value Kc (ΔPs> Kc), it is presumed that the degree of water pressure drop is still large and there is water leakage. 4 the curve indicated by symbol F ₂ of (a)).

On the other hand, when the water pressure drop amount ΔPs is equal to or smaller than the threshold value Kc (ΔPs ≦ Kc), it is estimated that the degree of water pressure drop is small and there is no water leakage, so that it is judged as acceptable. 4 the curve indicated by symbol F ₁ of the (a)).

[0059] The above method (2), the case of (3), in order to form a bath circuits C and heating circuit B as a single closed circuit, even initially as attempt to make predetermined pressure P _H,
If that does not reach the water pressure P _H is not a minor water leakage, such as loosening of the packing such as piping, since a large water leak, such as piping is out is considered to have occurred, of course fail Is determined.

(4) Method of Determining Water Leakage in Heating Circuit B and Bath Circuit C (Part 4) In the method of (1), a single threshold value Ka is used to determine the presence or absence of water leakage. On the other hand, in the method (4), the threshold value Ka is set in multiple steps (Ka = Ka ₁ , Ka ₂ , K
a ₃ ,..., where Ka ₁ > Ka ₂ > Ka ₃ >...), and each threshold value Ka (= Ka ₁ ,
The determination of the presence or absence of a water leak based on the comparison of Ka ₂ , Ka ₃ ,...) Is performed simultaneously and in parallel.

The procedure will be specifically described below with reference to the flowchart shown in FIG.

When the start button is pressed (step 1), pressurization of the heating circuit B and the bath circuit C is started by the above-described procedure.

Then, a predetermined water pressure P _H (here, 2 kg / cm
When the addition of ^2), in that the water pressure P _H is a predetermined time (here 1
It is checked whether the operation is continued for more than 0 second) (step 2).

[0064] When a predetermined pressure P _H is not continued,
It is not a slight water leak such as loose piping packing, etc.
Since a large leak, such as a pipe is out is considered to be generated, the state in which a predetermined pressure P _H can not be continued, for example, if continues 50 minutes (step 3),
Rejection judgment (error) because there is no possibility of water leak repair
(Step 4).

In step 2, if the water pressure P _H continues for a certain period of time or more, the buzzer informs the user of this fact in order to proceed to the next determination operation (step 5). It is checked whether P is equal to or greater than a preset reference value P _L (here, 1.5 kg / cm ² ) (step 6).

If it is immediately after steps 2 and 5, step 6 is of course YES, but if there is a lapse of time after step 8 to be described later and the water pressure P is equal to or less than the reference value P _L , a determinable water pressure is obtained. However, since the degree of the water pressure drop is large, it is estimated that there is water leakage, and a rejection determination (error) is made (step 7).

On the other hand, if the water pressure P is larger than the reference value P _L , the water pressure reduction rate α is obtained, and the water pressure reduction rate α is divided into three levels, and is set to each of the threshold values Ka ₁ , Ka ₂ , K
a _{3 (however, Ka 1> Ka 2> Ka} 3) simultaneously comparing (step 8, 9, 10).

Then, the water pressure drop rate α is determined by each threshold value Ka ₁ ,
When the states larger than Ka ₂ and Ka ₃ respectively continue, for example, five or ten times, it is presumed that the degree of water pressure drop is still large and there is water leakage, so that rejection is judged.
(Error) (Steps 11, 12, 13, 14, 1
0,17).

However, the determination of rejection is made using different threshold values Ka ₁ , Ka ₂ , and Ka ₃ , so that the degree of water leakage can be estimated.

On the other hand, when the water pressure drop rate α
If it is smaller than a ₁ , Ka ₂ , Ka ₃ (step 18),
Since it is estimated that the degree of water pressure drop is small and there is no water leakage, it is determined to be acceptable (step 19).

The reason why it is checked in step 17 whether or not α ≦ Ka ₃ continues ten times is to increase the certainty of the determination of no water leakage. The reason for observing the passage of time in step 15 is to prevent the threshold Ka _{3 from} being severe and erroneously judging that there is a leak even though it is normal. (Step 16).

As described above, according to the method (4), the degree of water leakage can be classified and determined as large, medium and small. Can be set up.

In the description of the method (4), the threshold value K
The case where a is divided into three stages (= Ka ₁ , Ka ₂ , and Ka ₃ ) has been described. However, the present invention is not limited to this, and is divided into two stages or set in four or more stages. You can also. Further, the respective steps are not performed simultaneously but sequentially [S8 (→ S11) → S9 (→ S13) → S10 (→ S1
7)], but in this case, much time is required until the pass is determined.

The method (4) has been described based on the method (1). However, in the methods (2) and (3), the threshold value Kc can be set in multiple steps (Kc = Kc _1, Kc _2, K
c _3, ..., _{however, Kc 1> Kc 2> Kc} 3> ...) to set separately, each of the threshold Kc for pressure reduction amount ΔPs (= Kc
_1, Kc _2, Kc _3, it is also possible to perform the determination of the presence or absence of water leakage based on a comparison of ...) simultaneously in parallel.

Further, in this embodiment, a case has been described in which the water leak test for the heating circuit B and the bath circuit C is collectively performed, but if an on-off valve is provided in the middle of the pipes 26a and 26b of the bath circuit C, In addition, it is possible to perform a water leak inspection of only the heating circuit B, and to provide an on-off valve in the middle of the branch circuit 53, so that a water leak of only the bath circuit C can be inspected.

In this embodiment, the water leak test is performed by the pressure sensor 5 for controlling the bath water level. However, a pressure sensor dedicated to the leak test may be separately provided in the circuit to be tested.

[0077]

According to the present invention, not only can the heating circuit and bath circuit be independent of each other, or both circuits can be inspected at once for the presence or absence of water leakage, but also the water leakage inspection can be performed more than before. It can be performed more accurately, and the reliability of the inspection result is increased.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a heating circulation device with a bath circulation device according to an embodiment of the present invention.

FIG. 2 is an explanatory view when an adapter used for water leak inspection of a bath circuit is attached to a circulating bracket of a bathtub.

FIG. 3 is an explanatory diagram in the case of making a pass / fail judgment in a water leak test;

FIG. 4 is an explanatory diagram in the case of making a pass / fail judgment in a water leak test;

FIG. 5 is a flowchart for explaining a case where a pass / fail judgment is made in a water leak test;

FIG. 6 is a diagram showing a configuration of a conventional heating device with a bath.

[Explanation of symbols]

Z ₁ : Main body of device, A: Hot water supply circuit, B: Heating circuit, C: Bath circuit, D: Drop circuit, 1 ... Water volume servo valve, 2 ... Drop valve, 3 ... Bath circulation pump, 4 ... Adapter, 5 ... Pressure Sensor, 7: circulation fitting, 10: bathtub, 20: radiator, 21 ...
Expansion tank, 22: heating heat exchanger, 24: bath heater,
26a, 26b, 29a, 29b ... external piping, 30 ... water refill valve, 31 ... heating circulation pump, 34, 35 ... cutoff valve, 4
5: overflow pipe, 48: water supply pipe, 53: branch pipe.

Claims (5)

[Claims] 1. A method for performing a water leak test in a circulating apparatus having a heating circuit connected to various radiators for hot water heating and / or a bath circuit connected to a bathtub, circuits and / or bath circuit formed as a closed circuit which is not open to the atmosphere, its after a certain time by adding a predetermined pressure P _H with respect to closed circuit, a preset water pressure P in the closed circuit Compared with the reference value P _L , if P ≧ P _L , the water pressure drop rate α is further examined. If the water pressure drop rate α is equal to or less than a predetermined threshold value Ka (α ≦ Ka), water leakage occurs. A method for inspecting water leakage in a circulation device, wherein it is determined that there is no water leak. 2. A method for inspecting for water leakage in a circulating apparatus having a heating circuit connected to various radiators for hot water heating and / or a bath circuit connected to a bathtub. The heating circuit and / or the bath circuit is formed as a closed circuit that is not released to the atmosphere, and after applying a predetermined water pressure _PN to the closed circuit, the water pressure drop rate α in the closed circuit is checked, and the water pressure drop is checked. The reference value K for which the rate α is set in advance
b) measuring a time T remaining until the time reaches b, and if the measured time T is equal to or less than a preset reference value Th (T ≦ Th), it is determined that there is no water leak; Method. 3. A method for inspecting for a water leak in a circulating device having a heating circuit connected to various radiators for hot water heating and / or a bath circuit connected to a bathtub, The heating circuit and / or the bath circuit is formed as a closed circuit that is not opened to the atmosphere, and after applying a predetermined water pressure P _H to the closed circuit, a water pressure drop rate α in the closed circuit is checked.
A time T until the water pressure drop rate α reaches the preset reference value Kb is measured, and if the measured time T is equal to or less than the preset reference value Th (T ≦ Th), a further constant time Ts The water pressure drop amount ΔPs is obtained and the water pressure drop amount ΔP
s is compared with a preset threshold value Kc, and the water pressure drop amount Δ
A method for inspecting water leakage in a circulating apparatus, wherein it is determined that there is no water leakage only when Ps is equal to or less than a threshold value (ΔPs ≦ Kc). 4. The method according to claim 1, wherein the threshold values Ka and Kc for determining the presence or absence of water leakage are divided into multiple stages. A method for inspecting water leakage in a circulating device, characterized in that: 5. The method according to claim 4, wherein the determination of presence / absence of water leakage based on a comparison of each of the threshold values Ka and Kc divided into multiple stages is performed in parallel. A method for inspecting water leakage in a circulator.