JP2001280862A - Brine heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brine heat exchanger 1 in which the shape can be held stably even if the pressure of refrigerant is high without requiring a powerful supporting force. SOLUTION: The brine heat exchanger comprises a heat receiver 18 where brine, e.g. water, flows through a pipe forming a groove 2 extending in the longitudinal direction, and a right circular gas cooler 19 fitted in the groove 2 of the heat receiver 18 and passing refrigerant having pressure higher than that of the water wherein heat is transferred efficiently between the water and the refrigerant. The shape can be held stably even if the pressure of the refrigerant is high without requiring a powerful supporting force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brine heat exchanger capable of efficiently exchanging heat between brine such as refrigerant and water.

[0002]

2. Description of the Related Art Today, heat exchangers are used in various fields, for example, in refrigeration systems, for heat exchange between refrigerant and air.

[0003] Such a refrigeration system is used as an air conditioner in ordinary households and the like, and is used for generating a cold heat source of a freezer refrigerator, and is used in a store such as a supermarket for generating a cold heat source in a showcase. Have been.

FIG. 6 is a block diagram of a refrigeration system in such a supermarket, in which a cold heat generating unit 10 is installed outdoors or outside a business area such as a store warehouse, and products are installed in a store and displayed. The showcase section 20 is a main component.

[0005] The cold heat generator 10 comprises a refrigerating circuit, a compressor 11 for compressing the refrigerant, a condenser 12 for condensing the compressed refrigerant, a decompression device 13 for decompressing or restricting the condensed refrigerant, and evaporating the refrigerant. It has an evaporator 15 and the like, these are connected in a ring by a refrigerant pipe, and the refrigerant circulates in the refrigerant pipe.

The showcase section 20 also includes a pump 17 for circulating brine (for example, water), a heat receiver 16 provided in thermal contact with the evaporator 15, and air at a place where goods are displayed. A cooling coil 21 for exchanging heat with water; a flow regulating valve 22 for regulating a flow rate of water flowing through the cooling coil 21;
A bypass valve 23 or the like for adjusting the total amount of water supplied to 1 is provided, these are connected in a ring by piping, and water is circulated by a pump 17.

In such a configuration, the refrigerant compressed by the compressor 11 exchanges heat with the outside air in the condenser 12 to be condensed, and the pressure is reduced or reduced by the pressure reducing device 13 and supplied to the evaporator 15 where the refrigerant is evaporated. And returns to the compressor 11.

[0008] As described above, the evaporator 15 is connected to the heat receiver 16.
The heat generated when the refrigerant evaporates in the evaporator 15 is supplied from the water circulating in the heat receiver 15. This lowers the temperature of the water.

The water whose temperature has dropped as described above is supplied to the pump 17.
Through the flow control valve 22 and the cooling coil 2
In step 1, heat exchange is performed with the air at the place where the product is displayed, and the flow returns to the heat receiver 16.

Therefore, it is important to improve the heat exchange efficiency between the heat receiver 16 and the evaporator 15 in order to efficiently cool the product. In the following description, a heat exchanger composed of the heat receiver 16 and the evaporator 15 is referred to as a brine heat exchanger 14.
It is described.

Conventionally, as this brine heat exchanger 14, pipes for circulating a refrigerant and pipes for circulating water are vertically stacked as shown in FIGS. Has been proposed in which the heat contact area is increased by flattening the heat contact area.

FIG. 7 is a perspective view, and FIG. 8 is a sectional view.

[0013]

However, in a configuration in which the pipe is flattened to increase the thermal contact area between the heat receiver 16 and the evaporator 15, the pressure of the refrigerant circulating in the evaporator 15 is high. In addition, there is a problem that the flat formed pipe expands due to this pressure, and the thermal contact area is reduced.

Further, in order for these pipes to come into close contact with each other, it is necessary to have a supporting force for pushing them in with a large force. There is a problem that the flat pipe whose supporting force is larger than an appropriate value is easily deformed and crushed, as well as being a cause of the increase.

Accordingly, an object of the present invention is to provide a brine heat exchanger that can stably maintain its shape even when the pressure of the refrigerant is high and does not require a strong supporting force.

[0016]

According to a first aspect of the present invention, there is provided a low pressure pipe in which a first brine flows through a pipe in which a concave groove is formed in a longitudinal direction; A heat pipe is formed between the first brine and the second brine by being formed by a perfect circular high-pressure pipe in which a second brine having a higher pressure than the first brine flows and which is fitted in a groove of the pipe. And a configuration in which the shape can be stably maintained even when the pressure of the second brine is high, and a strong supporting force is not required.

According to a second aspect of the present invention, there is provided a low-pressure pipe in which a first brine flows through a pipe in which a concave groove is formed vertically symmetrically in a longitudinal direction, and an internal pipe which is fitted in the groove of the low-pressure pipe. Is formed by a perfect circular high-pressure pipe through which a second brine having a higher pressure than the first brine flows so that heat can be efficiently transferred between the first brine and the second brine. The configuration is such that the shape can be stably maintained even when the pressure of the brine is high, and a strong supporting force is not required.

[0018] The invention according to claim 3 is characterized in that the end of the low-pressure pipe is appropriately bent so as to surround the high-pressure pipe and supports the high-pressure pipe.

The invention according to claim 4 is characterized in that the low-pressure pipe and the high-pressure pipe are helically twisted in the longitudinal direction.

According to a fifth aspect of the present invention, there is provided a perfect circular low-pressure pipe through which the first brine flows, and a perfect circular pipe spirally wound around the low-pressure pipe by flowing the second brine having a higher pressure than the first brine. And high pressure pipes to efficiently transfer heat between the first brine and the second brine, and maintain a stable shape even when the pressure of the second brine is high. And does not require a strong supporting force.

According to a sixth aspect of the present invention, a circular low pressure pipe in which the first brine flows and a second brine having a higher pressure than the first brine flow and are spirally wound with the low pressure pipe. Formed by a perfect circular high pressure pipe
In addition to efficiently conducting heat transfer between the brine and the second brine, the shape can be stably maintained even when the pressure of the second brine is high, and a strong supporting force is required. It is characterized in that it is not configured.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a configuration of a brine heat exchanger 1 according to the present embodiment.

The brine heat exchanger 1 is formed of a heat receiver 18 which is a low-pressure pipe having a concave groove 2 on one side, and a gas cooler 19 which is a round high-pressure pipe.

The heat receiver 18 and the gas cooler 19
The heat receiver 18 is made of a member having high thermal conductivity such as copper.
As the first brine flowing through, for example, water is given,
The second brine flowing through the gas cooler 19 includes a refrigerant such as a carbon dioxide refrigerant.

The groove 2 of the heat receiver 18 is formed in a round shape in accordance with the outer shape of the gas cooler 19, and the end 3 when the gas cooler 19 is fitted in the groove 2 as shown in FIG. As appropriate.

The gas cooler 19 is inserted into the groove 2 of the heat receiver 18.
Then, the gas cooler 19 is wrapped by appropriately bending the end of the gas cooler 19 inward.

Thus, the heat receiver 18 and the gas cooler 19
And the gas cooler 19 is wrapped and supported by the heat receiver 18.

With this configuration, even if a high-pressure refrigerant circulates through the gas cooler 19, the gas cooler 1
9 is a perfectly circular pipe, which has a high pressure resistance and can be prevented from being easily deformed.

Accordingly, a large force is not required for the heat receiver 18 to support the gas cooler 19, and the production becomes easy.

Incidentally, in order to make the thermal contact between the heat receiver 18 and the gas cooler 19 more reliable, it is conceivable to connect them using solder or the like. In this case, however, the heat receiver 18 and the gas cooler 19 may be connected. If there is a hole in the hole, there is an inconvenience that the refrigerant and the brine are mixed, and thus the present invention does not use such a connecting means.

As described above, the heat receiver 18 and the gas cooler 19 are structurally separated from each other by the above-described structure, but can always conduct good heat transfer because they are in close contact with each other.

It should be noted that the present invention is not limited to the above-described configuration. For example, as shown in FIG.
Two grooves 2a may be provided symmetrically, and two gas coolers 19a may be fitted into the grooves 2a.

With this configuration, the heat contact area between the heat receiver 18a and the gas cooler 19a increases, and the heat transfer characteristics can be further improved.

Further, in the configuration shown in FIG. 1 or FIG. 3, the groove of the heat receiver is formed straight,
It is also possible to adopt a helically twisted configuration as shown in FIG.

Needless to say, in this case, the groove 2b is formed in advance in a spiral shape, and the gas cooler 19b is fitted therein.
It is clear that the gas cooler 29b may be fitted in the straight groove 2b and then spirally twisted.

As described above, the heat receiver 18 b and the gas cooler 19
b is helically twisted to provide an advantage that the coupling between the gas cooler 19b and the heat receiver 18b can be easily increased and held, and such a structure can be used. There is an advantage that the bending operation is facilitated when bending.

Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a perspective view showing the configuration of the line heat exchanger 1c according to the present embodiment.

As shown in the figure, the gas cooler 19c and the heat receiver 18c are formed of a perfect circular pipe, and have a structure in which the heat receiver 18c is spirally wound around a linear gas cooler 19c.

Of course, it is also possible to adopt a structure in which the gas cooler 19c and the heat receiver 18c are mutually twisted.

By adopting such a structure, it is possible to make the structure easy to bend and to have excellent heat transfer characteristics, and to connect the heat receiver 18c and the gas cooler 19c with a constant bonding force. Become like

The above description has been made on the assumption that the brine heat exchanger is used when transferring the cold generated by the refrigerating apparatus as shown in FIG. 6 to the showcase section.

However, the present invention is not limited to such an application object. For example, the present invention relates to a hot water supply device in which a refrigeration unit is operated by a heat pump cycle and hot water is heated by heat from the gas cooler. It is also possible to apply.

[0043]

As described above, according to the first aspect of the present invention, a pipe in which a concave groove is formed in a longitudinal direction is formed in a low pressure pipe in which a first brine flows, and the pipe is formed in a groove of the low pressure pipe. Fitted and formed by a perfect circular high-pressure pipe through which a second brine having a higher pressure than the first brine flows, so that heat can be efficiently transferred between the first brine and the second brine. Therefore, the shape can be stably maintained even when the pressure of the second brine is high, and a strong supporting force is not required, so that the heat transfer characteristics and the reliability can be improved.

According to the second aspect of the present invention, a pipe in which a concave groove is formed vertically symmetrically in the longitudinal direction is formed into a low-pressure pipe formed by flowing the first brine, and the pipe is fitted into the groove of the low-pressure pipe. , The inside of which is formed by a circular high-pressure pipe through which a second brine having a higher pressure than the first brine flows so as to efficiently transfer heat between the first brine and the second brine. Even if the pressure of the second brine is high, the shape can be stably maintained, and a strong supporting force is not required, so that the heat transfer characteristics and the reliability can be improved.

According to the third aspect of the present invention, the end of the low-pressure pipe is appropriately bent so as to surround the high-pressure pipe to support the high-pressure pipe. The adhesion between the constant-pressure pipe and the high-pressure pipe increases.

According to the fourth aspect of the present invention, since the low-pressure pipe and the high-pressure pipe are formed by being helically twisted in the longitudinal direction, the holding of the high-pressure pipe becomes easy, and the low-pressure pipe and the high-pressure pipe are connected to each other. The adhesion of is increased.

According to the fifth aspect of the present invention, the circular low pressure pipe through which the first brine flows and the second brine having a higher pressure than the first brine flow and are spirally wound around the low pressure pipe. Formed by a perfect circular high pressure pipe
Since the heat is efficiently transferred between the brine and the second brine, the shape can be stably maintained even when the pressure of the second brine is high, and a strong supporting force is not required. Thus, the heat transfer characteristics and the reliability can be improved.

According to the sixth aspect of the present invention, a true circular low-pressure pipe through which the first brine flows and a second brine having a higher pressure than the first brine flow, and are spirally wound with the low-pressure pipe. The first and second brines are formed so as to efficiently transfer heat between the first brine and the second brine, so that the shape is stable even when the pressure of the second brine is high. Holding is possible, and strong supporting force is not required, so that heat transfer characteristics and reliability can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a brine heat exchanger applied to the description of a first embodiment of the present invention.

FIG. 2 is a sectional view of FIG.

FIG. 3 is a perspective view of a brine heat exchanger showing another configuration.

FIG. 4 is a perspective view of a brine heat exchanger showing another configuration.

FIG. 5 is a perspective view of a brine heat exchanger applied to the description of a second embodiment of the present invention.

FIG. 6 is a configuration diagram of a refrigeration apparatus.

FIG. 7 is a perspective view of a brine heat exchanger applied to the description of the related art.

FIG. 8 is a sectional view of FIG. 8;

[Explanation of Signs] 1, 1a, 1b, 1c Line heat exchanger 1, 1a, 1b Groove 19, 19a, 19b, 19c Gas cooler 18, 18a, 18b, 18c Heat receiver

Claims (6)

[Claims] 1. A low-pressure pipe formed by flowing a first brine through a pipe having a concave groove formed in a longitudinal direction; and a low-pressure pipe fitted into the groove of the low-pressure pipe, so that the inside of the pipe has a pressure lower than that of the first brine. A brine heat exchanger formed by a high-circular high-pressure pipe through which a high second brine flows to cause heat transfer between the first brine and the second brine. 2. A low-pressure pipe in which a first brine flows through a pipe in which a concave groove is formed vertically symmetrically in a longitudinal direction, and the first brine is fitted into the groove of the low-pressure pipe and the inside is fitted with the first brine. A brine heat exchanger, wherein the second brine having a higher pressure is formed by a flowing high-pressure pipe having a perfect circle, and heat is transferred between the first brine and the second brine. 3. The brine heat exchanger according to claim 1, wherein an end of the low-pressure pipe is appropriately bent so as to surround the high-pressure pipe to support the high-pressure pipe. 4. The low pressure pipe and the high pressure pipe,
The brine heat exchanger according to any one of claims 1 to 3, wherein the brine heat exchanger is helically twisted in a longitudinal direction. 5. A perfect circular low-pressure pipe through which a first brine flows, and a perfect circular high-pressure pipe spirally wound around the low-pressure pipe through which a second brine having a higher pressure than the first brine flows. Wherein the first and second brines conduct heat transfer between the first and second brines. 6. A perfect circular low-pressure pipe through which the first brine flows, and a perfect circular high-pressure pipe in which a second brine having a higher pressure than the first brine flows and spirally wound with the low-pressure pipe. A brine heat exchanger formed by a pipe for causing heat transfer between the first brine and the second brine.