JPH0486432A - Cooling device and cooling/heating device - Google Patents

Abstract

PURPOSE:To enhance the condensing efficiency of a condenser by a method wherein a gas-liquid separating device is disposed above a liquid receiving tank and a float is disposed within a main body of a tank and a valve for opening a lower opening of the main body of the tank is provided. CONSTITUTION:A gas-liquid separator device 37 has a main body 39 of a tank to be disposed above a liquid receiving tank 21. A pair of separated ends 41 and 43 are opened at a gaseous part 38 at an upper part of the main body 39 of the tank. A lower opening 47 of the main body 39 of the tank and an upper gaseous part 49 in the liquid receiving tank 21 are connected and then a drain pipe passage 45 is disposed. A float 51 moving up and down in response to a variation in liquid surface of refrigerant is stored in the main body 39 of the tank. One end of a connector member 3 is fixed to the float 51. A valve member 55 is disposed at the other end of the connector member 53. With such an arrangement above, the refrigerant containing gaseous substance and liquid substance within the pipe passage 33 is condensed only in its light gaseous substance at a condenser 25, any liquid refrigerant is not contained in the refrigerant supplied to the condenser 25, resulting in that a condensing efficiency is substantially improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cooling device and a heating and cooling device, and in particular,
The present invention relates to a cooling device and an air-conditioning device using a refrigerant that changes gas-liquid phase.

[Conventional technology]

BACKGROUND ART Conventionally, as a heating and cooling apparatus using a refrigerant that undergoes a gas-liquid phase change, such as a fluorocarbon-based refrigerant, there is known, for example, the one disclosed in Japanese Patent Laid-Open No. 2-57835, which was previously filed by the present applicant.

FIG. 4 shows the air-conditioning system disclosed in this publication. It is configured by disposing at least one indoor evaporator/condenser 15 that exchanges heat with the indoor evaporator/condenser 15, necessary piping and cooling/heating switching valves, and a liquid pump 17 that performs a heat cycle using these. , Freon-based refrigerants are used as heat transport means.

In the above-mentioned air-conditioning equipment, a fluorocarbon-based refrigerant is circulated as a heat transport means, which reduces the amount of refrigerant transported, reduces power consumption, and reduces the size of piping to save installation space. It becomes possible to save money.

In addition, conventional liquid pump systems can only perform cooling, but this air-conditioning system has a reversible cycle, so it can be used for both cooling and 111 purposes.Furthermore, it can also be used as a DHC heat source, and can handle indoor loads. It is also possible to easily control the imbalance.

In this air-conditioning system, during cooling, the liquid pump 1
7 is activated, and the refrigerant in the liquid receiving tank 11 passes through the first pipe line 18 to the indoor evaporator/condenser 1, as shown by the thick line in the figure.
The air flows into the evaporator/condenser 13 through the second pipe line 19, where it receives the evaporative action and cools the indoor air.
The liquid flows into the liquid receiving tank 11, undergoes a condensation action there, and circulates through the third pipe line 20 into the liquid receiving tank 11.

[Problem to be solved by the invention]

However, in such a conventional air conditioning system, in order to improve the heat exchange efficiency of the indoor evaporator/condenser 15 during cooling, the liquid pump 17 is used to increase the heat exchange efficiency of the indoor evaporator/condenser 15.
When a large amount of liquid refrigerant is supplied to the refrigerant, a part of the liquid refrigerant flows directly into the second pipe line 19, and the refrigerant in the second pipe line 19 becomes a mixture of gas and liquid parts. If the refrigerant in this state is directly led to the condenser/evaporator 13, there is a problem in that the condensation efficiency in the condenser/evaporator 13 is extremely reduced.

The present invention solves the above-mentioned problems, and aims to provide a cooling device and an air-conditioning device that can significantly improve the condensing efficiency of a condenser compared to the conventional one.

[Means to solve the problem]

The cooling device according to the present invention includes a liquid receiving tank that stores a refrigerant in a liquid state that undergoes a gas-liquid phase change, an evaporator that exchanges heat between the refrigerant and room air, and an evaporator that exchanges heat between the refrigerant and an external cold source. a condenser to be replaced; a first condenser that connects the outlet side of the liquid receiving tank and one side of the evaporator and is equipped with a liquid pump;
a pipe line, a second pipe line connecting the other side of the evaporator and one side of the condenser, and a third pipe line connecting the other side of the condenser and the inlet side of the liquid receiving tank. In the cooling device equipped with
A gas-liquid separator is disposed in the second pipe line to separate gas and liquid in the second pipe line and guide only the gas content to the condenser, and this gas-liquid separator is connected to the liquid receiving liquid. a tank body disposed above the tank, in which a pair of divided ends of the second pipe line are opened to an upper gas section; a lower opening of the tank body and an upper gas section of the liquid receiving tank; a drain pipe connecting the tank body to the tank body, and a float that is housed in the tank body and moves up and down in accordance with changes in the liquid level of the refrigerant in the tank body;
The valve body is connected to the float via a connecting member of a predetermined length, and opens the lower opening of the tank body when the liquid level in the tank body reaches a predetermined liquid level.

The air conditioning system of the present invention includes a liquid receiving tank that stores a refrigerant that undergoes a gas-liquid phase change in a liquid state, an evaporator that exchanges heat between the refrigerant and indoor air, and an external cooling source that exchanges heat with the refrigerant. a first conduit connecting the outlet side of the liquid receiving tank and one side of the evaporator and having a liquid pump interposed therein; and a third pipe line that connects the other side of the condenser and the inlet side of the liquid receiving tank, in which the second pipe line has a third pipe line connected to the liquid receiving tank. A gas-liquid separator that separates the gas and liquid in the two pipes and guides only the gas to the condenser is installed, and this gas-liquid separator is placed above the liquid receiving tank and separated. a tank body in which the pair of divided ends of the second pipe line are opened to an upper gas part; and a drain pipe connecting a lower opening of the tank body to an upper gas part of the liquid receiving tank. , a float that is housed in the tank body and moves up and down following changes in the liquid level of the refrigerant in the tank body; and a float that is connected to the float via a connecting member of a predetermined length so that the liquid level in the tank body is adjusted to a predetermined level. and a valve body that opens the lower opening of the tank body when the tank body is in the position.

[For production]

In the air-conditioning device and the air-conditioning/heating device of the present invention, during cooling, the refrigerant in the liquid receiving tank flows into the evaporator through the first pipe, where it receives the evaporation action and cools the indoor air;
It enters the condenser through the second line, where it is subjected to condensation action, and is then circulated through the third line into the receiving tank.

In the present invention, the gas-liquid separator disposed in the second pipe separates the gas and liquid in the second pipe, and only the gas is guided to the condenser.

That is, the refrigerant containing gas and liquid in the second pipe flows out from the divided end on the evaporator side to the upper part of the tank body, and only the light gas component flows out from the divided end on the condenser side. It is led from the part to the condenser and condensed in the condenser.

On the other hand, when the liquid that has flowed into the tank body exceeds a predetermined liquid level, the liquid level rises, which causes the float to rise, the valve body to rise via the connecting member, and the lower opening of the tank body to open. The liquid is then passed through the drain pipe from the bottom of the tank body and led to the liquid receiving tank.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, details of the present invention will be described with reference to embodiments shown in the drawings.

FIG. 1 shows an embodiment of the cooling device of the present invention.
In the figure, the reference numeral 21 indicates a liquid receiving tank that stores a refrigerant that undergoes a gas-liquid phase change, such as a fluorocarbon refrigerant, in a liquid state.

Reference numeral 23 indicates a plurality of evaporators (only one is shown) that exchange heat between the refrigerant and indoor air.

Reference numeral 25 indicates a condenser for exchanging heat between the refrigerant and a cold source from the outside, and a cold source supply pipe 27 for supplying a cold source such as cold water from the outside is inserted through the condenser 25. ing.

A first pipe line 29 is formed by connecting the outlet side of the liquid receiving tank 21 and one side of the evaporator 23, and a liquid pump 31 is arranged in this first pipe line 29.

Further, a second pipe line 33 is formed by connecting the other side of the evaporator 23 and one side of the condenser 25.

Furthermore, a third pipe line 35 is formed by connecting the other side of the condenser 25 and the inlet side of the liquid receiving tank 21.

In this embodiment, a gas-liquid separator 37 is arranged in the second pipe line 33 to separate the gas and liquid parts in the second pipe line 33 and guide only the gas part to the condenser 25. There is.

This gas-liquid separation device 37 has a tank body 39 disposed above the liquid receiving tank 21 .

A pair of divided ends 4143 of the divided second pipe line 33 are opened in the upper gas section 38 of the tank body 39 .

A drain pipe line 45 is arranged to connect the lower opening 47 of the tank body 39 and the upper gas section 49 of the liquid receiving tank 21 .

A float 51 that moves up and down following changes in the liquid level of the refrigerant within the tank body 39 is housed within the tank body 39 .

To this float 51, one end of a connecting member 53 of a predetermined length made of, for example, a chain is fixed.

At the other end of this connecting member 53, a tank body 39 is attached.
A valve body 55 is arranged to open the lower opening 45 of the tank body 39 when the liquid level within the tank reaches a predetermined level.

In the cooling device configured as described above, when the liquid pump 31 is operated, the refrigerant in the liquid receiving tank 21 is transferred to the first pipe line 2.
9, the air flows into the evaporator 23, where it receives an evaporative action, cools the indoor air, and flows through the second pipe line 33 to the condenser 25.
, where it is condensed, and then flows into the third pipe 3.
5 and circulates into the liquid receiving tank 21.

However, in the cooling device configured as above, the second
A gas-liquid separation device 37 is provided in the pipe 33 to separate the gas and liquid in the second pipe 33 and guide only the gas to the condenser 25.
At the same time, this gas-liquid separation bag W37 is placed above the liquid receiving tank 21, and the pair of divided ends 41 and 43 of the divided second pipe line 33 are opened to the upper gas section. Tank body 39 and lower opening 47 of this tank body 39
and a drain pipe 45 that connects the gas section 49 at the upper part of the liquid receiving tank 21, and a float 51 that is housed in the tank body 39 and moves up and down to follow changes in the liquid level of the refrigerant in the tank body 39.
and a valve body 55 that is connected to the float 51 via a connecting member 53 of a predetermined length and opens the lower opening 47 of the tank body 39 when the liquid level in the tank body 39 reaches a predetermined liquid level. Therefore, the refrigerant containing the gas and liquid components in the second pipe line 33 flows out to the upper part of the tank body 39 through the divided end 41 on the evaporator 23 side, and only the light gas component flows into the condenser 2.
The condenser 25 is guided from the divided end 43 on the 5 side to the condenser 25.
On the other hand, when the liquid that has flowed into the tank body 39 exceeds a predetermined liquid level, the liquid level rises, causing the float 51 to rise and flow through the connecting member 53 to the valve body 55.
is raised, the lower opening 47 of the tank body 39 is opened,
Since the refrigerant is led from the lower part of the tank body 39 to the liquid receiving tank 21 through the drain pipe 45, the refrigerant supplied to the condenser 25 contains liquid refrigerant that does not require condensation and reduces heat exchange efficiency. Therefore, the condensation efficiency in the condenser 25 can be significantly improved compared to the conventional method.

In addition, in the cooling device configured as described above, the float 5 moves up and down following changes in the liquid level of the refrigerant in the tank body 39.
1 to adjust the liquid level in the tank body 39, it is possible to easily and reliably adjust the liquid level without requiring any special equipment such as a control valve or sensor. Become.

FIG. 2 shows an embodiment of the air conditioning system of the present invention. In this embodiment, an indoor evaporator/condenser 51 having the functions of an evaporator and a condenser is arranged indoors. Also, an evaporator 53 is arranged outside the room to exchange heat between the refrigerant and a heat source from the outside.

A heat source supply pipe 55 for supplying a heat source such as hot water from the outside is inserted into the evaporator 53 .

A fourth pipe line 57 is formed by connecting the outlet side of the liquid receiving tank 21 and one side of the evaporator 53, and an on-off valve 59 is disposed in the fourth pipe line 57.

Further, a fifth pipe line 61 is formed by connecting the other side of the evaporator 53 and the other side of the indoor evaporator/condenser 51.

Furthermore, a sixth pipe line 65 is arranged which branches from between the on-off valve 63 of the first pipe line 29 and the indoor evaporator/condenser 51 and connects to the inlet side of the liquid receiving tank 21. An on-off valve 67 is arranged in the sixth conduit 65.

In the second pipe line 33, a gas-liquid separation device that is the same as the gas-liquid separation device 37 of the above-described embodiment is arranged.

In the air-conditioning system configured as described above, cooling is performed in substantially the same manner as in the embodiment described above, using the indoor evaporator/pseudo-condenser 51 as an evaporator.

On the other hand, for heating, the liquid pump 31 is operated to cause the refrigerant in the liquid receiving tank 21 to flow into the evaporator 53 through the fourth pipe line 57, and the refrigerant subjected to evaporation here is transferred to the fifth pipe line 61. The refrigerant that heats the indoor air is passed through the sixth pipe line 6 to flow into the indoor evaporator/condenser 51 where it undergoes a condensing action.
This is done by circulating the liquid through the liquid receiving tank 21 through the liquid receiving tank 21.

Even in the air-conditioning device configured as described above, substantially the same effect as the embodiment shown in FIG. 1 can be obtained during cooling.

FIG. 3 shows another example of the float of the present invention. In this example, a bracket 70 is fixed inside the tank body 39, and one end of an arm 72 is swingably connected to the bracket 70. ing.

The float 51 is fixed to the other end of the arm 72, and one end of the connecting member 53 is fixed to the arm 72.

Although almost the same effect as in FIGS. 1 and 2 can be obtained with the above configuration, in this example, the float 5
Since the float 51 is fixed by the arm 72 so as to be able to move up and down, the float 51 can be prevented from moving on the liquid surface.

(Effects of the Invention) As described above, according to the present invention, the second
A gas-liquid separator is installed that separates the gas and liquid in the pipeline and guides only the gas to the condenser.This gas-liquid separator is placed above the liquid receiving tank and a tank main body in which a pair of divided ends of a second pipe are opened to an upper gas section; a drain pipe connecting a lower opening of the tank main body to an upper gas section of the liquid receiving tank; A float is housed in the tank body and moves up and down following changes in the liquid level of the refrigerant in the tank body, and the float is connected to the float via a connecting member of a predetermined length so that the liquid level in the tank body reaches a predetermined liquid level. and a valve body that opens the lower opening of the tank body when Only the light gas component is led from the divided end on the condenser side to the condenser and condensed in the condenser, while the liquid component that has flowed into the tank body exceeds a predetermined liquid level. The liquid level rises, which causes the float to rise, the valve body to rise via the connecting member, the lower opening of the tank body to open, and the liquid to be guided from the lower part of the tank body through the drain pipe to the liquid receiving tank. Therefore, the refrigerant supplied to the condenser does not contain liquid refrigerant that does not require condensation and reduces heat exchange efficiency.
There is an advantage that the condensation efficiency in the condenser can be significantly improved compared to the conventional method.

[Brief explanation of drawings]

FIG. 1 is a piping system diagram showing an embodiment of the cooling device of the present invention. FIG. 2 is a piping system diagram showing an embodiment of the air conditioning system of the present invention. FIG. 3 is an explanatory diagram showing another example of the float. FIG. 4 is a piping system diagram showing a conventional heating and cooling system. [Explanation of symbols of main parts] 21... Liquid receiving tank 23...Evaporator 25...Condenser 29...First pipe line 31...Liquid pump 33...Second pipe line 35... Third pipe line 38.49... Gas section 39... Tank body 41.43... Divided end portion 45... Drain pipe line 47... Lower opening 51... Float 53...Connecting member 55...Valve body. Figure Figure Figure Figure

Claims (2)

[Claims] (1) A liquid receiving tank that stores a refrigerant that changes gas-liquid phase in a liquid state, an evaporator that exchanges heat between the refrigerant and indoor air, and a condenser that exchanges heat between the refrigerant and an external cold source. , a first pipe line connecting the outlet side of the liquid receiving tank and one side of the evaporator and having a liquid pump interposed therein; and a first pipe line connecting the other side of the evaporator and one side of the condenser. In the cooling device comprising two pipes and a third pipe connecting the other side of the condenser and the inlet side of the liquid receiving tank, the second pipe is connected to the gas in the second pipe. A gas-liquid separator is disposed that separates the gas from the liquid and leads only the gas to the condenser, and this gas-liquid separator is disposed above the liquid receiving tank and connected to the separated second pipe a tank body whose pair of divided ends open to the upper gas section; a drain pipe connecting the lower opening of the tank body to the upper gas section of the liquid receiving tank; A float that moves up and down following changes in the liquid level of the refrigerant in the tank body, and a float that is connected to the float via a connecting member of a predetermined length and that is connected to the tank body when the liquid level in the tank body reaches a predetermined level. and a valve body that opens a lower opening of the air conditioner. (2) A liquid receiving tank that stores a refrigerant that changes in gas-liquid phase in a liquid state, an evaporator that exchanges heat between the refrigerant and indoor air, and a condenser that exchanges heat between the refrigerant and an external cold source. , a first pipe line connecting the outlet side of the liquid receiving tank and one side of the evaporator and having a liquid pump interposed therein; and a first pipe line connecting the other side of the evaporator and one side of the condenser. In the air conditioning system, the air conditioning system has a cooling circuit including two pipes and a third pipe connecting the other side of the condenser and the inlet side of the liquid receiving tank. A gas-liquid separator is disposed that separates the gas component from the liquid component and guides only the gas component to the condenser, and the gas-liquid separator is disposed above the liquid receiving tank and A tank main body in which a pair of divided ends of two pipes are opened to an upper gas section, a drain pipe connecting a lower opening of this tank main body to an upper gas section of a liquid receiving tank, and the tank main body. A float is housed in the tank body and moves up and down to follow changes in the liquid level of the refrigerant inside the tank body, and the float is connected to this float via a connecting member of a predetermined length so that the liquid level inside the tank body reaches a predetermined liquid level. and a valve body that opens a lower opening of the tank body.