JPH07174350A - Heat conveying device - Google Patents

Abstract

PURPOSE:To shorten the open-close cycle to increase the heat conveying capacity of a heat conveying device where refrigerant is heated with the aim of heating, by arranging plates with perforations close to the interior wall of a liquid receiver at nearly equal intervals. CONSTITUTION:A gas-liquid separator 1 is situate above a refrigerant heater 2 and communicates with the refrigerant heater 2 via an inlet pipe 3 and an outlet pipe 4. A heat carrying device 18 has a liquid receiver 5 that is situated above the gas-liquid separator 1 and communicates with the gas-liquid separator 1 via an on-off valve 8 and a first check valve 6. A ring circulation path 19 connects the gas-liquid separator 1, a radiator 10, a second check valve 12, and the liquid receiver 5 together in turn. A gap 22 is formed by plates 20 that have perforations 21 and are arranged close to the interior wall of the liquid receiver 5 at nearly equal intervals. Therefore, high-temperature gas refrigerant in the liquid receiver 5 is rapidly cooled and condensed by an atomized supercooled refrigerant sprayed toward the center of the liquid receiver 5, so that the liquid refrigerant is sucked fast into the liquid receiver 5 at once when the on-off valve 8 is opened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat transfer device for utilizing heat for heating or the like by utilizing a pressure increase when heating a refrigerant.

[0002]

2. Description of the Related Art A conventional heat transfer device is disclosed, for example, in Japanese Patent Laid-Open No.
As shown in Japanese Patent Publication No. 51631, the structure is as shown in FIG.

That is, the gas-liquid separator 1 is arranged above the refrigerant heater 2 and is connected by an inlet pipe 3 of the refrigerant heater 2 and an outlet pipe 4 of the refrigerant heater 2 and connected by an annular pipe line. ing. Further, the liquid receiver 5 is arranged above the gas-liquid separator 1, is connected to the gas-liquid separator 1 by a drop pipe 7 having a first check valve 6, and further has an outlet pipe by a pressure equalizing pipe 9 having an opening / closing valve 8. It is connected to the gas-liquid separator 1 via 4. The gas-liquid separator 1 and the radiator 10 arranged on the indoor side as the use side are connected by a gas refrigerant forward pipe 11, and the radiator 10 and the liquid receiver 5 are liquid refrigerant return pipes having a second check valve 12. Connected at 13. As described above, the gas-liquid separator 1, the radiator 10, the second check valve 12, the liquid receiver 5, and the first check valve 6 form an annular circulation path sequentially connected by piping. Reference numeral 14 is a temperature detector provided in the outlet pipe 4 of the refrigerant heater 2, and 15 is a control device for controlling the opening / closing time of the opening / closing valve 8 according to the temperature detected by the temperature detector 14. Reference numeral 16 is a burner provided in the refrigerant heater 2, and the burner 16 heats the refrigerant. Reference numeral 17 is a blower provided in the radiator 10.

The operation of the above structure will be described below. In the refrigerant heater 2, the refrigerant heated by the combustion heat of the burner 16 flows into the gas-liquid separator 1 through the outlet pipe 4 in a two-phase state of gas and liquid, and the liquid refrigerant is heated again from the inlet pipe 3 by the refrigerant heating. Flows into the vessel 2. On the other hand, gas-liquid separator 1
Of the two-phase refrigerant that has flowed into the gas refrigerant, the gas refrigerant enters the radiator 10 through the gas refrigerant outflow pipe 11 and exchanges heat with the indoor air sent by the blower 17, dissipates heat and condenses into supercooled liquid.

When the on-off valve 8 is closed, the supercooled liquid refrigerant condensed and liquefied in the radiator 10 is returned to the liquid refrigerant return pipe 13.
Through the second check valve 12 to flow into the liquid receiver 5 by condensing the gas refrigerant. At this time, the pressure inside the liquid receiver 5 is lower than the pressure inside the gas-liquid separator 1, so the first check valve 6 is closed. In this state,
When the opening / closing valve 8 is opened, the liquid receiver 5 and the gas-liquid separator 1 communicate with each other through the pressure equalizing pipe 9 to be in a pressure equalizing state, and the liquid refrigerant in the liquid receiver 5 passes through the first check valve 6 by gravity. It flows into the gas-liquid separator 1.

Next, when the on-off valve 8 is closed again, the first check valve 6 is closed, and the liquid refrigerant condensed and supercooled in the radiator 10 into the liquid receiver 5 is stored in the liquid receiver 5. The cycle in which the liquid is sucked by the sudden pressure reduction and the liquid receiver 5 is filled with the liquid refrigerant is repeated. As described above, the natural circulation cycle between the gas-liquid separator 1 and the refrigerant heater 2 is based on the evaporated refrigerant pressure, and the supply of the liquid refrigerant from the liquid receiver 5 to the gas-liquid separator 1 and the refrigerant heater 2 is performed by the open / close valve 8 It is an intermittent operation cycle according to the open / close cycle of.

[0007]

In the above-mentioned conventional structure, the heat-transferring by the heating of the refrigerant is carried out. Therefore, the opening / closing operation cycle of the opening / closing valve 8 is set as shown in FIG. It was necessary to consider the time T _l . In other words, reduced pressure in the receiver tank 5 is generated from the on-off valve 8 is opened with a delay of time T _l from the time t ₁ has Tsu switched to the closed state, decompression time T _r
Then, the inside of the liquid receiver 5 is filled with the liquid refrigerant, and the pressure reduction is completed. The depressurization start delay time T _l is mainly due to the heat capacity of the container of the liquid receiver 5. The depressurization time T _r is the time until the liquid refrigerant has finished flowing into the empty receiver 5 and depends on the internal volume of the receiver 5 and the flow path resistance from the radiator 10 to the receiver 5. Determined. Further, the opening time T _ON is the time required for the liquid refrigerant to drop from the liquid receiver 5 that is full to the gas-liquid separator 1, and the internal volume of the liquid receiver 5 and the pressure equalizing pipe 9
And the flow path resistance of the drop pipe 7.

[0008] closing period T _S of the thus-off valve 8 is the sum of the open time T _ON and the closing time _{T OFF (T S = T O} N + T OFF), further closing time T _OFF is vacuum start delay time T _It is the sum of _l and the depressurization time T _r (T _OFF = T _l + T _r ). Since this depressurization start delay time T _l is relatively large, there is a restriction on the reduction of the closing time T _OFF , and there is no choice but to set the opening / closing cycle T _{S to} be long, and the heat transfer amount (when used for heating is used. There was a constraint on increasing the heating capacity).

The present invention is intended to solve the above-mentioned problems, in which a porous plate material is provided on the inner wall of the liquid receiver in close proximity to each other,
Shortening the required decompression time shortens the open / close cycle,
The purpose is to increase the heat transfer capacity.

[0010]

In order to achieve the above object, the present invention provides a refrigerant heater and a gas which is disposed above the refrigerant heater and which communicates with the refrigerant heater through an inlet pipe and an outlet pipe. A liquid separator, a heat transfer unit having a liquid receiver arranged above the gas-liquid separator and communicating with the gas-liquid separator via an on-off valve and a first check valve; the gas-liquid separator, a radiator, (2) An annular circulation path in which the check valve and the liquid receiver are sequentially connected, and a plate material having porosity are provided near the inner wall of the liquid receiver at substantially equal intervals to form a gap.

[0011]

According to the present invention, the supercooled liquid refrigerant flows into the liquid receiver when the liquid receiver is filled with the high temperature refrigerant gas and then the on-off valve is closed, and the plate member having the inner wall of the liquid receiver and the porous material is formed. After accumulating in the gap, it is jetted from this porosity to the center of the receiver into fine particles. Therefore, the gas inside is condensed by the fine particles of the supercooled refrigerant, the refrigerant pressure inside the receiver sharply drops, and because the low-temperature liquid refrigerant is sucked from the radiator,
Due to the condensation of the gas refrigerant by the supercooled liquid refrigerant, the decompression in the liquid receiver occurs without the decompression start delay time, and the liquid refrigerant is sucked into the liquid receiver at the same time when the on-off valve is closed.

By eliminating the depressurization start delay time in this way, the closing time of the on-off valve is greatly shortened, the opening / closing cycle is shortened, and the number of times of sucking and dropping of the liquid receiver per unit time is increased to increase the refrigerant. By increasing the circulation amount and increasing the refrigerant heating amount, the heat transfer amount (heating capacity when used for heating) can be increased.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, the same reference numerals as those in FIG. 3 denote the same members and have the same functions, and therefore detailed description thereof will be omitted and different points will be mainly described.

Reference numeral 18 is a refrigerant heater 2 having a burner 16.
And a gas-liquid separator 1 are connected to an annular conduit, and a liquid receiver 5 provided above the gas-liquid separator 1 is provided with a drop pipe 7 having a first check valve 6 and a pressure equalizing pipe having an opening / closing valve 8. 9 is a heat transfer unit connected to the annular pipe line. Reference numeral 19 is an annular circulation path in which the gas-liquid separator 1, the radiator 10, the second check valve 12, and the liquid receiver 5 are sequentially connected by piping. Reference numeral 20 denotes a plate material having pores 21 close to the inner wall of the liquid receiver 5 at substantially equal intervals, and forms a gap 22. The plate member 20 is made of metal, ceramic,
It is made by punching and netting resin and other materials.
A circulation path 19 is connected to the liquid receiver 5 via the second check valve 12. Reference numeral 23 is a combustion amount varying device for varying the combustion amount of the burner 16, 24 is an on-off valve 8, a temperature detector 1
4. A control device electrically connected to the combustion amount varying device 23.

In the above-mentioned structure, the heat transfer is performed by heating the refrigerant by the opening / closing operation of the opening / closing valve 8, the combustion in the burner 16 and the operation of the blower 17.

Here, when the on-off valve 8 is closed, the supercooled liquid refrigerant condensed and liquefied in the radiator 10 is returned to the liquid refrigerant return pipe 1.
From 3 through the second check valve 12, the gas refrigerant in the liquid receiver 5 is condensed to flow into the liquid receiver 5. This time,
Since the pressure inside the liquid receiver 5 is lower than the pressure inside the gas-liquid separator 1, the first check valve 6 is closed.
Then, the supercooled liquid refrigerant flows into the liquid receiver 5 from the circulation path 19, and when the liquid receiver 5 is filled with the liquid refrigerant, the on-off valve 8 is opened.
When is opened, the liquid receiver 5 and the gas-liquid separator 1 communicate with each other through the pressure equalizing pipe 9, so that the liquid refrigerant in the liquid receiver 5 flows through the first check valve 6 due to gravity. It flows into the liquid separator 1. At this time, the gas refrigerant of the gas-liquid separator 1 that replaces the liquid refrigerant of the liquid receiver 5 flows from the pressure equalizing pipe 9 through the opening / closing valve 8 to the liquid receiver 5.

After the liquid receiver 5 is filled with the high temperature refrigerant gas, when the on-off valve 8 is closed, the supercooled liquid refrigerant flows into the liquid receiver 5 from the second check valve 12 and the inner wall of the liquid receiver 5 After accumulating in the gap 22 of the plate member 20 having porosity, it is ejected from this porosity 21 to the center of the low-pressure receiver 5 in the form of fine particles.
Therefore, the high-temperature gas refrigerant inside is cooled and condensed by the fine particles of the supercooling refrigerant, and the refrigerant pressure inside the liquid receiver 5 is drastically reduced, so that the low-temperature liquid refrigerant is sucked from the radiator 10, so that the supercooling refrigerant is cooled. Due to the condensation of the gas refrigerant by the liquid refrigerant, the decompression in the liquid receiver 5 occurs without the decompression start delay time, and the liquid refrigerant is sucked into the liquid receiver 5 at the same time as the opening / closing valve 8 is closed. Is repeated with the liquid refrigerant.

A case where the on-off valve 8 is operated so as to open from the closed state in the above heat transfer operation will be described with reference to FIG. 2, the on-off valve 8 at the same time as time t _O was Tsu switching is in the closed state from the open state, the hot gas refrigerant inside the fine subcooling refrigerant receiver within 5 instantaneously by condensing been cooled The depressurization in the liquid receiver can be started, and the depressurization start delay time T _l 'can be practically eliminated (T _l ' = 0). Therefore, the closing time T _OFF 'of the on- _off valve 8 need only be the net decompression time _Tr (T _OFF ' = T _r ), and the opening / closing cycle T _S 'can be significantly shortened (T _S ' = T _r + T _ON ). . Therefore, the receiver 5
The refrigerant circulation capacity is increased by increasing the number of times the liquid refrigerant is sucked in and dropped in, and the combustion amount in the refrigerant heater 2 is increased to increase the heat transfer amount (heating capacity when used for heating). . The drive input is not required, and the input of the on-off valve 8 is the only input of heat transfer, and the economical efficiency is not lost.

FIG. 5 shows another embodiment of the present invention.
The porous plate member 20 is formed in a cylindrical shape with a punching plate, a wire mesh, or the like so as to cover the entire inner surface of the liquid receiver 5, and is provided in the inner wall of the liquid receiver 5 at substantially equal intervals, and a part thereof is provided. Receiver 5
And the first check valve 7 are brought into contact with the outer circumference of the communicating portion. Therefore, the flow of the refrigerant once enters the plate member 20 having the porosity, then passes through the porosity 21 again, and flows out to the first check valve 6. It is possible to prevent foreign substances and the like in the refrigerant from being caught by the plate member 20 and flowing into the first check valve 6. If the portion of the perforated plate 21 of the plate member 20 in contact with the outer periphery of the communication portion between the liquid receiver 5 and the first check valve 7 is made into a sufficiently fine hole, the air tightness of the first check valve 6 during depressurization Therefore, high reliability can be ensured with a simple structure, and the inner wall of the liquid receiver 5 and the plate material 20 having porosity can be easily provided in close proximity to each other.

FIG. 6 shows another embodiment of the present invention. In FIG. 6, reference numeral 25 denotes a container arranged above the refrigerant heater 2, and the container 25 is partitioned by a partition plate 28 into an upper liquid receiving portion 26 and a lower gas-liquid separate liquid storage portion 27. Refrigerant heater 2 and gas-liquid separate liquid reservoir 2
7 communicates with an inlet pipe 3 and an outlet pipe 4. Reference numeral 18 denotes a refrigerant heater 2 having a burner 16 and a gas-liquid separate liquid reservoir 2
7 is connected to an annular pipe line, and a pipe line is provided with an opening / closing valve 29 between the liquid receiving part 26 and the gas-liquid separate liquid reservoir part 27 and a heat transfer part connected to the annular pipe line. Reference numeral 19 denotes an annular circulation path in which the gas-liquid separator liquid reservoir 27, the radiator 10, the second check valve 12, and the liquid receiver 26 are sequentially connected by piping. The container 25 is formed integrally with a partition plate 28 by molding a metal such as iron aluminum and then brazing, welding, etc., and the on-off valve 8 is joined to the partition plate 28 or is integrally configured. In this embodiment, the partition plate 28
The valve seat portion 32 is integrally formed with the valve seat portion 32, and the valve element 33 that rotates in contact with the valve seat portion 32 is moved by the electromagnetic coil 34.
Open and close.

A plate member 20 having perforations 21 is formed on the inner wall of the liquid receiving section 26 at substantially equal intervals, with a gap 22 provided therebetween.
The lower portion of the plate member 20 is enlarged and held in constant contact with the inner wall of the liquid receiving portion. Reference numeral 23 is a combustion amount varying device for varying the combustion amount of the burner 16, and 24 is a control device electrically connected to the on-off valve 8, the temperature detector 14, and the combustion amount varying device 23.

In the above structure, when the on-off valve 8 is opened, the liquid receiving portion 26 and the gas-liquid separate liquid storage portion 27 communicate with each other to equalize the pressure, and the liquid refrigerant in the liquid receiving portion 26 is opened and closed by gravity. 8 and flows into the gas-liquid separate liquid reservoir 27. At this time, the gas refrigerant in the gas-liquid separator liquid reservoir 27, which replaces the liquid refrigerant in the liquid receiving section 26 at the same time, flows to the liquid receiving section 26 through the opening / closing valve 8. Next, when the on-off valve 8 is closed again when all the liquid refrigerant in the liquid receiving section 26 has flowed, the liquid receiving section 26 is instantly depressurized to a low pressure, and the radiator 10 is placed in the liquid receiving section 26.
The cycle in which the condensed and subcooled liquid refrigerant is sucked and the liquid receiving section 26 is filled with the liquid refrigerant is repeated. Here, the pressure equalizing pipe 9 in the conventional example is eliminated, and the diameter of the on-off valve 8 is increased so that the gas refrigerant is replaced at the same time as the liquid refrigerant drops from the on-off valve 8. Is shortest because the opening / closing valve 8 is directly attached to the partition plate 28.
Therefore, the flow path resistances of the gas refrigerant and the liquid refrigerant flowing through the opening / closing valve 8 become small, and the liquid refrigerant of the liquid receiving section 26 which becomes full at the same time as the opening / closing valve 8 is opened is replaced with the gas refrigerant to replace the gas-liquid separate liquid. A large amount is dropped into the reservoir 27.

Therefore, the flow path resistance can be reduced.
Opening time T of open / close valve 8_ONCan be significantly shortened. Also,
If the on-off valve 8 is closed when the on-off valve 8 is closed, the second
From the check valve 12, the supercooled liquid refrigerant flows into the liquid receiving section 26,
The liquid is accumulated in the gap 22 between the inner wall of the liquid portion 26 and the porous plate member 20.
After this, the center of the liquid receiving portion 26, which has a low pressure from the porous 21
It is atomized into fine particles and ejected. Therefore, this
The high temperature gas refrigerant inside is cooled by the fine particles of the cooling refrigerant.
After condensation, the refrigerant pressure inside the liquid receiving section 26 drops sharply.
However, since the low-temperature liquid refrigerant is sucked from the radiator 10, it is overcooled.
Condensation of the gas refrigerant by the effluent refrigerant reduces the inside of the liquid receiving section 26.
The pressure is generated without a delay time for the start of decompression, and the on-off valve 8 is closed.
At the same time, the liquid refrigerant is sucked into the liquid receiving section 26 at once, and
The cycle in which 5 is filled with the liquid refrigerant is repeated. others
Therefore, there is no delay in decompression and the closing time T of the on-off valve 8 _OFFSignificantly shorter
Can be shortened.

Therefore, the refrigerant circulation capacity is increased by increasing the number of times the liquid refrigerant is sucked / dropped in the liquid receiving section 26, and the combustion amount in the refrigerant heater 2 is increased to increase the heat transfer amount (heating for heating). Ability can be increased.

[0025]

As described above, the heat transfer device of the present invention includes a refrigerant heater and a gas-liquid separator which is disposed above the refrigerant heater and which communicates with the refrigerant heater through an inlet pipe and an outlet pipe. A heat transfer unit arranged above the gas-liquid separator and having a liquid receiver communicating with the gas-liquid separator via an on-off valve and a first check valve; a gas-liquid separator, a radiator, and a second check. Since an annular circulation path in which the valve and the liquid receiver are sequentially connected and a plate material having porosity are provided at the inner wall of the liquid receiver in close proximity to each other to form a gap, the following effects are obtained.

(1) The high-temperature gas refrigerant inside is cooled and condensed by the fine particles of the supercooled refrigerant which are atomized into fine particles and ejected toward the center of the receiver, and the refrigerant circulation amount by greatly shortening the opening / closing cycle. It is possible to increase the heat transfer capacity by increasing the number.

(2) Further, the input of the heat transfer is only the input of the on-off valve, and the economical efficiency is not lost.

(3) Since the plate member having the porosity is provided so as to cover the entire inner surface of the liquid receiver and a part of the plate member is brought into contact with the outer circumference of the communicating portion, the first non-return of foreign matters in the refrigerant is prevented. The first check valve 6 can be prevented from flowing into the valve, the airtightness of the first check valve 6 at the time of depressurization is maintained, and high reliability can be secured with a simple configuration.

(4) A container provided with a partition plate for partitioning the upper liquid receiving portion and the lower gas-liquid separator liquid storing portion, and a plate material having a porous material is provided on the inner wall of the liquid receiving portion at substantially equal intervals to form a gap. By providing the above, the flow path resistance can be reduced, the opening time T _{ON of the} on-off valve can be greatly shortened, and the decompression delay can be eliminated, and the closing time T _{OFF of the} on- _off valve can be greatly shortened. Therefore, the refrigerant circulation capacity increases due to an increase in the number of times the liquid refrigerant is sucked / dropped in the liquid receiving unit, which increases the combustion amount in the refrigerant heater and further increases the heat transfer amount (heating capacity when used for heating). Greater ability can be achieved.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of a heat transfer device according to an embodiment of the present invention.

[Fig. 2] Decompression characteristic diagram of the liquid receiver

FIG. 3 is a system configuration diagram of a conventional heat transfer device.

FIG. 4 is a decompression characteristic diagram of a liquid receiver in a conventional heat transfer device.

FIG. 5 is a system configuration diagram of a heat transfer device according to another embodiment of the present invention.

FIG. 6 is a system configuration diagram of a heat transfer device according to another embodiment of the present invention.

[Explanation of symbols] 1 gas-liquid separator 2 refrigerant heater 5 liquid receiver 6 first check valve 8 on-off valve 10 radiator 12 second check valve 18 heat transfer section 19 circulation path 20 porous plate material 21 porous 22 Gap 24 Control device 25 Container 26 Liquid receiver 27 Gas-liquid separator Liquid reservoir 28 Partition plate

Claims (3)

[Claims] 1. A refrigerant heater, a gas-liquid separator which is arranged above the refrigerant heater and which communicates with the refrigerant heater through an inlet pipe and an outlet pipe, and which is arranged above the gas-liquid separator and is opened and closed. A heat transfer part having a liquid receiver communicating with the gas-liquid separator via a valve and a first check valve, and an annular shape in which the gas-liquid separator, a radiator, a second check valve and the liquid receiver are sequentially connected. The heat transfer device in which the circulation path and the inner wall of the liquid receiver are provided with porous plate members in close proximity to each other at substantially equal intervals to form a gap. 2. The heat transfer device according to claim 1, wherein the entire inner surface of the liquid receiver is covered with a plate having porosity and is brought into contact with the outer periphery of the communication portion of the first check valve of the liquid receiver. . 3. A container provided with a partition plate for partitioning an upper liquid receiving part and a lower gas-liquid separator liquid reservoir located above the refrigerant heater, the refrigerant heater and the gas-liquid separator liquid reservoir. An inlet pipe and an outlet pipe communicating with each other, a heat transfer unit having an opening / closing valve on the partition plate, an annular circulation path sequentially connecting the gas-liquid separator liquid reservoir, the radiator and the liquid receiving unit, and the receiving unit. A heat transfer device in which a gap is formed by providing plate members having porosity close to the inner wall of the liquid portion at substantially equal intervals.