JP2012073005A - Combination of water heating system and heating medium injector, and heating medium injector used for water heating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combination of a water heating system and a heating medium injector capable of inhibiting appropriately failure that air in heating medium circulation path advances into a heating medium injector and failure that heating medium splashes on a liquid level sensor to generate incorrect detection during the heating medium injection work to the heating medium circulation path.SOLUTION: The combination of a water heating system and a heating medium injector consists of a water heating system S, which is provided with an air-liquid separation tank 3 in a heating medium circulation path 4 and is composed such that driving of a pump P for heating medium circulation can be controlled based on a heating medium liquid level detected using a liquid level sensor 6, and a heating medium injector 5, where a tube 51 with a plug section 52 arranged therein is connected to a container 50 to inject the heating medium in the container 50 into the air-liquid separation tank 3 from a heating medium inlet 32 through the tube 51. In the heating medium injector 5, when the plug section 52 is attached to the heating medium inlet 32, the tube 51 is prolonged to the vicinity of the bottom in the air-liquid separation tank 3 and an apex 51' of the tube 51 is disposed to be lower than the liquid level sensor 6.

Description

  The present invention relates to a technique for appropriately injecting a heat medium into a heat medium circulation path of a hot water system such as a solar hot water system configured to circulate a liquid heat medium such as an antifreeze liquid in a certain path.

In order to actually operate the system after installing the hot water system having the heat medium circulation path, it is necessary to fill the heat medium circulation path with the heat medium. As a specific example of the means for this purpose, there is a means described in Patent Document 1.
In the means described in the document, a heat medium is injected into a gas-liquid separation tank of a heat medium circulation path using a heat medium injection tool. The heating medium injector has a configuration in which a hose is connected to a container that stores the heating medium, and a plug body is provided on the hose. The plug body is for mounting on a heat medium inlet provided in the upper part of the gas-liquid separation tank. When a heat medium is put into the container in a state where the plug body is mounted on the heat medium inlet, the heat medium passes through the hose and flows into the gas-liquid separation tank. The hot water system is provided with a heat medium circulation pump, and by driving this pump, the heat medium injected into the gas-liquid separation tank can be sent to each part of the heat medium circulation path.

  However, in the prior art, when the heat medium is injected into the gas-liquid separation tank using the heat medium injection tool, the lower end tip of the hose of the heat medium injection tool is located at a considerably high position in the upper part of the gas-liquid separation tank. is there. For this reason, there is a possibility of causing the following problems.

  First, when the heat medium is injected into the gas-liquid separation tank and the pump is driven to send the heat medium to each part of the heat medium circulation path, the air present in the heat medium circulation path is It flows into the gas-liquid separation tank. Then, this air may enter the hose of the heat medium injection tool. When air enters the hose as described above, it becomes difficult to smoothly inject the heat medium from the heat medium injection tool into the gas-liquid separation tank. Further, when a relatively large amount of air enters the hose vigorously, there is a possibility that the air rises into the container in the heat medium injection tool and the heat medium in the container blows out to the outside.

  Secondly, although not described in Patent Document 1, in the hot water system as described above, a liquid level sensor is provided in the gas-liquid separation tank, and the heat medium injected into the gas-liquid separation tank has a predetermined temperature. When the liquid level rises, means for driving a pump for circulating the heat medium at that time may be employed (see Patent Document 2). Conventionally, when such a means is employed, the heat medium injected into the gas-liquid separation tank from the hose of the heat medium injection tool is applied to the liquid level sensor, and the liquid level sensor may cause false detection. . If such erroneous detection occurs, the pump for circulating the heat medium is unreasonably driven, which is not appropriate.

JP 2010-133573 A JP 2010-156503 A

The present invention has been conceived under the circumstances as described above, and the air in the heat medium circulation path proceeds into the heat medium injection tool during the heat medium injection work into the heat medium circulation path. A combination of a hot water system and a heating medium injection tool that can appropriately prevent the malfunction that occurs and the malfunction that the heating medium is applied to the liquid level sensor and cause false detection, and the heating medium injection work, and hot water An object of the present invention is to provide a heating medium injector for the system.

  In order to solve the above problems, the present invention takes the following technical means.

  The combination of the hot water system and the heating medium injector provided by the first aspect of the present invention has a gas-liquid separation tank provided in a heating medium circulation path through which a liquid heating medium circulates in a fixed path, and this gas-liquid A hot water system configured to control the drive of the heat medium circulation pump based on the liquid level of the heat medium detected by using a liquid level sensor provided in the separation tank, and to store the heat medium A pipe part provided with a plug part is connected to a possible container, and the heat medium in the container is introduced into the gas-liquid separation tank from a heat medium inlet provided in the upper part of the gas-liquid separation tank. A combination of a hot water system and a heating medium injection tool, wherein the plug body portion is the heat medium injection device. When installed in the medium inlet, the pipe part is close to the bottom in the gas-liquid separation tank. To extend the tip of the pipe portion, it is characterized in that it is configured to be less disposed than the liquid level sensor.

According to such a configuration, the following effects can be obtained.
First, when injecting the heat medium into the gas-liquid separation tank using the heat medium injection tool, the tip of the pipe part of the heat medium injection tool has a considerably low height near the bottom in the gas-liquid separation tank. Therefore, the tip of the pipe part can be maintained at a position lower than the liquid level of the heat medium. In this way, even when a phenomenon occurs in which the air in the heat medium circulation path flows into the gas-liquid separation tank when the pump is driven to circulate the heat medium in the heat medium circulation path, Unlike the above, the air does not enter the pipe portion of the heat medium injector. As a result, there is no inconvenience that the operation of injecting the heat medium becomes difficult due to the air entering the tube portion of the heat medium injection tool or the heat medium in the container of the heat medium injection tool is ejected. Can be.
Secondly, unlike the prior art, the heat medium flowing out from the tip of the pipe part is not applied to the liquid level sensor because the tip of the pipe part of the heat medium injector is at a position lower than the liquid level sensor. The liquid level sensor can prevent erroneous detection. Therefore, it is possible to appropriately solve the problem that the heat medium circulation pump is driven at an inappropriate timing due to erroneous detection of the liquid level sensor.

  In the present invention, preferably, in the heat medium injection tool, when the plug body portion is attached to the heat medium injection port, a portion closer to the tip than the plug body portion of the pipe portion is the gas-liquid separation tank. A configuration that is set so as to be inclined with respect to a central axis extending in the vertical direction of the tube, and is capable of avoiding contact with the liquid level sensor by offsetting a portion near the tip of the tube portion from the central axis. It is said that.

  According to such a configuration, when inserting the pipe part of the heat medium injection tool into the gas-liquid separation tank, the pipe part is not improperly contacted with the liquid level sensor, and the liquid level sensor is erroneously detected or damaged. It is preferable to prevent the above.

  In the present invention, it is preferable that the heat medium injection tool includes a latching means for suspending the container, and the hot water system is configured such that the container is suspended at a position lower than the gas-liquid separation tank. A first latching target portion capable of latching the latching means, and the container is higher than the gas-liquid separation tank so that injection of a heat medium from the container to the gas-liquid separation tank is prevented. And a second hooking target part capable of hooking the hooking means so that the heat medium is injected from the container into the gas-liquid separation tank.

  According to such a configuration, when the heating medium is replenished to the container of the heating medium injector, the container may be hung at a low height, and the heating medium replenished in the container is removed from the gas-liquid separation tank. When being poured into the container, the container may be suspended at a high height. Therefore, the heat medium injection work can be facilitated.

  The heating medium injector for the hot water system provided by the second aspect of the present invention is provided with a gas-liquid separation tank in the heating medium circulation path through which the liquid heating medium circulates in a fixed path, and this gas-liquid separation tank Heat medium injection using a hot water system configured to control the drive of the heat medium circulation pump based on the liquid level of the heat medium detected using the liquid level sensor provided in the inside A container capable of storing a heat medium, a pipe part connected to the container, and a plug part attached to the pipe part and attachable to the heat medium inlet of the gas-liquid separation tank And when the plug part is attached to the heat medium inlet, the pipe part extends to the vicinity of the bottom in the gas-liquid separation tank, and the pipe The tip of the part is configured to be lower than the liquid level sensor. It is set to.

  According to such a configuration, an effect similar to that described for the combination of the hot water system and the heat medium injector provided by the first aspect of the present invention can be obtained.

  Other features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings.

It is explanatory drawing which shows typically an example of the combination of the hot water system which concerns on this invention, and a heat-medium injection tool. It is principal part explanatory drawing which shows the state which inject | pours a heat medium into the gas-liquid separation tank of the warm water system shown in FIG. It is principal part explanatory drawing which shows the other example of this invention.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

In the embodiment of the present invention shown in FIG. 1, the hot water system S and the heat medium injector 5 are combined.
The hot water system S is, for example, a solar hot water system, and includes a heat collecting panel 1 that receives sunlight and heats a heat medium, and a hot water unit U that is connected to the heat collecting panel 1 via pipe portions 40a and 40b. I have. The hot water unit U includes a hot water storage tank 20, a heat exchanger 21, a gas-liquid separation tank 3, a heat medium circulation pump P, a reserve tank 22, and a control unit 23. 24. The heat collection panel 1, the heat exchanger 21, the gas-liquid separation tank 3, and the pump P are connected in a series of pipes, and a heat medium circulation path 4 that circulates the heat medium along a fixed path is configured by driving the pump P. ing. As the heat medium, for example, an antifreeze liquid is used. In the hot water system S, the heat medium is heated by the heat collecting panel 1, and heat exchange is performed between the heat medium and the hot water in the hot water storage tank 20 in the heat exchanger 21, thereby heating the hot water. .

The gas-liquid separation tank 3 is a type referred to as a so-called semi-hermetic type and has a preferable structure for suppressing evaporation of the heat medium. More specifically, the gas-liquid separation tank 3 includes a heat-medium inlet 30 for allowing the heat medium that has passed through the heat exchanger 21 to flow into the gas-liquid separation tank 3, and a heat-medium outlet 31 provided at the bottom. The heating medium inlet 32 provided at the top and normally closed with a lid, and the escape port 33 provided at the top of the gas-liquid separation tank 3 are provided. The escape port 33 is a part for allowing air or a heat medium in the gas-liquid separation tank 3 to escape to the reserve tank 22 side through the tube part 34.

  A liquid level sensor 6 is attached to the gas-liquid separation tank 3. The liquid level sensor 6 is configured using, for example, an electrode. When the liquid level of the heat medium existing in the gas-liquid separation tank 3 becomes a predetermined level LV or higher, a signal to that effect is input to the control unit 23. It is configured as follows. The control part 23 is comprised, for example using the microcomputer, and controls the drive of the pump P based on the presence or absence of the input of the said signal.

  As clearly shown in FIG. 2, the heat medium injector 5 includes a container 50, a pipe part 51, and a plug part 52. The container 50 is, for example, a flexible synthetic resin bag, and a heat medium can be placed inside the upper opening 50a and accommodated therein. The container 50 is connected to a hanging string-like or linear hooking member 53 for suspension. The latch member 53 corresponds to an example of the latch means in the present invention. As shown in FIG. 1, the hot water system S is provided with first and second hooking target portions 26 a and 26 b that can hook the hooking member 53 so as to suspend the container 50. . The first and second hooking target portions 26a and 26b will be described later. The plug body 52 is made of synthetic resin or rubber, and can be fitted and attached to the heat medium inlet 32 so as to close the heat medium inlet 32 of the gas-liquid separation tank 3.

  The pipe part 51 of the heating medium injector 5 is a part for guiding and injecting the heating medium accommodated in the container 50 into the gas-liquid separation tank 3, and is provided at the lower part of the container 50 and the upper part of the plug part 52. Short pipe portions 51a and 51b provided, a synthetic resin hose 51c connecting them, and a synthetic resin hose 51e connected to a short pipe portion 51d provided below the plug body 52. ing. Of the pipe portion 51, the portion 51A (the portion of the hose 51e) closer to the tip than the plug body 52 is formed in a relatively long dimension, and when the plug body 52 is attached to the heat medium inlet 32, It extends to the vicinity of the bottom in the gas-liquid separation tank 3, and its tip 51 ′ is configured to be lower than the liquid level sensor 6.

  The tip portion 51A of the pipe portion 51 is inclined by an appropriate angle α with respect to the central axis C extending in the vertical direction of the gas-liquid separation tank 3 when the plug body portion 52 is attached to the heat medium inlet 32. It is configured to be in a posture. As a result, it is possible to avoid contacting the liquid level sensor 6 by offsetting the tip end portion 51A from the central axis C. As means for inclining the tip end portion 51A as described above, for example, means for inclining the short pipe portion 51d can be employed.

  Next, the action of the combination of the hot water system S and the heat medium injector 5 will be described.

When the hot water system S is installed and used, it is necessary to preliminarily fill the heat medium circulation path 4 with a heat medium. In order to perform this operation, as shown in FIG. 2, the plug body 52 of the heat medium injector 5 is attached to the heat medium inlet 32, and the tip portion 51 A of the pipe portion 51 is placed in the gas-liquid separation tank 3. To insert. Since the tip portion 51A of the pipe portion 51 is offset from the central axis C of the gas-liquid separation tank 3 as described above, interference between the tip portion 51A and the liquid level sensor 6 is appropriately avoided. It is possible. It is necessary to put a heat medium in the container 50 in advance. At that time, the hooking member 53 is hooked on the first hooking target portion 26a, and the container 50 is removed from the gas-liquid separation tank 3. May be hung at a lower position (not shown). This facilitates the work of putting the heat medium in the container 50. After putting the heat medium in the container 50, the hooking member 53 is hooked on the second hooking target portion 26 b, and the container 50 is suspended at a position higher than the gas-liquid separation tank 3. Thereby, the injection of the heat medium into the gas-liquid separation tank 3 is started. In addition, although the 1st and 2nd latching object site | part 26a, 26b may be comprised using the member (for example, members, such as hook shape) for suspending the container 50, it is not necessarily such It may not be configured using a dedicated member.

  Since the tip 51 ′ of the pipe part 51 is located at a position lower than the liquid level sensor 6, the heat medium flowing out from the tip 51 ′ does not directly reach the liquid level sensor 6. Therefore, erroneous detection of the liquid level of the heat medium due to the direct application of the heat medium to the liquid level sensor 6 is appropriately prevented. As a result, there is no problem that the driving of the pump P is started even though the liquid level of the heat medium does not reach the predetermined level LV.

  When the liquid level of the heat medium reaches a predetermined level LV, driving of the pump P is started, and the heat medium in the gas-liquid separation tank 3 is sent to each part of the heat medium circulation path 4. At that time, the air in the heat medium circulation path 4 flows into the gas-liquid separation tank 3 from the heat medium inlet 30. On the other hand, the tip 51 ′ of the pipe portion 51 is located near the bottom of the gas-liquid separation tank 3, and after that, except for the time immediately after the start of the injection operation, the heat medium in the gas-liquid separation tank 3 is always kept. It is below the liquid level. For this reason, the air does not enter the pipe portion 51. As a result, it is possible to appropriately prevent such a problem that the heat medium injection operation into the gas-liquid separation tank 3 is hindered due to the presence of air that has entered the pipe portion 51. The air can be appropriately released from the escape port 33 to the outside of the gas-liquid separation tank 3.

  After the gas-liquid separation tank 3 is filled with the heat medium, the surplus heat medium can be released from the outlet 33 to the reserve tank 22 and stored. The plug body 52 plays a role of stabilizing the mounting state of the pipe section 51, but the heat medium inlet 32 is blocked by the plug body 52, so that excess heat from the heat medium inlet 32. The overflow of the medium is also appropriately prevented.

  FIG. 3 shows another embodiment of the present invention. In the figure, the same or similar elements as those in the above embodiment are given the same reference numerals as in the above embodiment.

  In the embodiment shown in FIG. 3, an auxiliary pipe part 55 is provided through the plug part 52 of the heat medium injector 5. The auxiliary pipe portion 55 is configured, for example, as a whole or substantially as a hose made of a synthetic resin, and one end 55 a thereof is located in the upper part in the gas-liquid separation tank 3. The other end 55b can be disposed in or above the reserve tank 22.

  In the present embodiment, even if the pipe connection work for the escape port 33 of the gas-liquid separation tank 3 has not yet been completed and the escape port 33 is in a closed state, the gas / liquid is utilized using the auxiliary pipe portion 55. Air in the separation tank 3 can be released. Further, after the gas-liquid separation tank 3 is filled with the heat medium, it is possible to appropriately flow the excess heat medium into the reserve tank 22.

  The present invention is not limited to the contents of the above-described embodiment. The specific configuration of each part of the hot water system and the heat medium injector to which the present invention is applied can be varied in design in various ways.

The container of the heat medium injector according to the present invention is not necessarily a soft synthetic resin bag, and may be a container made of a relatively hard member, for example. The pipe part of the heat medium injection tool extends to the vicinity of the bottom part in the gas-liquid separation tank when the plug is attached to the heat medium injection port of the gas-liquid separation tank, and the tip thereof is lower than the liquid level sensor. Any configuration can be used. Instead of a configuration in which a plurality of hoses or the like are connected, a single member (for example, one hose) may be used. In the above-described embodiment, the portion closer to the tip of the pipe portion is inclined by an appropriate angle α with respect to the central axis of the gas-liquid separation tank. is there. The plug body is only required to be attached to the heat medium inlet of the gas-liquid separation tank, and the specific material and shape thereof are not limited.

  The hot water system referred to in the present invention is not limited to a solar hot water system, but is a hot water system of a type that heats a heating medium using combustion gas generated by a burner, or a high temperature discharged from a fuel cell or a gas engine, for example. It can also be configured as a hot water system that heats the heat medium using the exhaust gas. Moreover, it can also comprise as what does not have a hot water storage tank. Although the heat medium in the present invention is a liquid, the specific type thereof is not limited, and water such as tap water can be used in addition to the antifreeze liquid.

S Hot water system P Heat medium circulation pump C Central shaft (gas-liquid separation tank)
3 Gas-Liquid Separation Tank 5 Heating Medium Injection Tool 6 Liquid Level Sensors 26a, 26b First and Second Engagement Sites 32 Heating Medium Injection Port 50 Container (of Heating Medium Injection Tool)
51 Pipe part (for heat transfer device)
51 'tip (on the tube)
52 Plug body (for heat transfer device)
53 Hooking member (Hanging means for heat medium injection tool)

Claims (4)

A gas-liquid separation tank is provided in the heat medium circulation path through which the liquid heat medium circulates in a fixed path, and the liquid level of the heat medium detected by using a liquid level sensor provided in the gas-liquid separation tank A hot water system configured to control the driving of the pump for circulating the heat medium, and
The gas-liquid separation is performed from a heat medium inlet provided in the upper part of the gas-liquid separation tank. A heat medium injection tool for injecting into the tank using the pipe part;
A combination of a hot water system and a heating medium injector,
In the heat medium injection tool, when the plug body portion is attached to the heat medium injection port, the pipe portion extends to the vicinity of the bottom portion in the gas-liquid separation tank, and the tip of the pipe portion has the liquid level. A combination of a hot water system and a heat transfer device, characterized in that the arrangement is lower than the sensor.   The heat medium injection tool has a central axis in which a portion closer to the tip than the plug body portion of the pipe portion extends in the vertical direction of the gas-liquid separation tank when the plug body portion is attached to the heat medium injection port. Is configured to be capable of avoiding contact with the liquid level sensor by offsetting a portion near the tip of the tube portion from the central axis. 1. A combination of the hot water system according to 1 and a heat transfer device. The heating medium injector includes a hooking means for hanging the container,
The hot water system can hang the hooking means so that the container is suspended at a lower position than the gas-liquid separation tank and injection of a heat medium from the container to the gas-liquid separation tank is prevented. The first latching target portion and the latching means so that the container is suspended at a position higher than the gas-liquid separation tank and the heat medium is injected from the container to the gas-liquid separation tank. A combination of the hot water system and the heating medium injection tool according to claim 1, further comprising: A gas-liquid separation tank is provided in the heat medium circulation path through which the liquid heat medium circulates in a fixed path, and the liquid level of the heat medium detected by using a liquid level sensor provided in the gas-liquid separation tank It is a heating medium injection tool intended for use with a hot water system configured to control the driving of the pump for circulating the heating medium based on
A container capable of storing a heat medium; a pipe connected to the container; and a plug attached to the pipe and attachable to a heat medium inlet at the top of the gas-liquid separation tank. Heating medium injection tool
When the plug body is attached to the heat medium inlet, the pipe extends to the vicinity of the bottom in the gas-liquid separation tank, and the tip of the pipe is arranged lower than the liquid level sensor. It is comprised as follows, The heat-medium injection tool characterized by the above-mentioned.

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