JPH031727Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to an air conditioner, particularly to an improvement in the heat insulating structure of a user-side water heat exchanger, a liquid reservoir, an accumulator, etc. that constitute a refrigeration circuit.

[Conventional technology]

Conventionally, in this type of air conditioner such as a chilling unit, a compressor is housed in a machine room that consists of a base plate, a plurality of columns erected on the base plate, and a drain tray supported by the columns. , user-side water heat exchanger, liquid storage container, throttling device, low-pressure accumulator,
A four-way switching valve, etc. is housed, and a non-use side air heat exchanger is placed above the drain tray and connected with refrigerant piping to form a refrigeration circuit, and the four-way switching valve operates the cooling cycle. Alternatively, it is configured to perform heating cycle operation.

[Problem that the invention attempts to solve]

These refrigeration circuit components are usually not surrounded by heat insulating material or the like, so for example, when cooling, there is a liquid storage container that is at low pressure, refrigerant in many inner tubes, and a gap between the inner and outer tubes. The user-side water heat exchanger, through which the fluid to be cooled flows, usually has a cold water temperature (5 to 10
℃) and refrigerant temperature (0 to -5℃) are outside air temperature (30 to -5℃).
40℃) and there is a temperature difference,
The heat loss is large, and the state of the refrigerant in the liquid storage container changes due to changes in outside air temperature and the presence or absence of surrounding wind, resulting in fluctuations in the amount of liquid in the liquid storage container, which causes problems on the user side. The amount of refrigerant supplied to the water heat exchanger becomes unstable, and the reliability and stability of the refrigeration cycle decreases, such as hunting and liquid backflow to the compressor. In addition, since the temperature of the cooled water in the water heat exchanger on the user side is lower than that of the outside air, a large amount of dew water is generated on the surface of the outer tube and drips onto the base plate, causing the base plate to become expensive. It is necessary to have a drain dish structure. In addition, there were many problems such as a decrease in heat exchange ability due to heat loss caused by the water that was cooled by exchanging heat with the refrigerant and dissipating heat through the surface of the outer tube.

In addition, even during heating, the temperature of hot water heated by exchanging heat with the refrigerant discharged from the compressor in the water heat exchanger on the user side reaches 50 to 60 degrees Celsius, which is lower than the ambient temperature (-10 to 5 degrees Celsius). Because of the large temperature difference between the air conditioner and the air conditioner, there is considerable heat radiation loss compared to when cooling, and the heat exchange capacity is significantly reduced.

Furthermore, the pressure reduction function of the throttling device is mainly determined by the state of the refrigerant (degree of supercooling, pressure, etc.), so if the state of the refrigerant changes, the refrigeration cycle will fluctuate, leading to a decrease in reliability.

Usually, these air conditioners are installed outdoors and are directly affected by the outside air, and as described above, there have been problems with a reduction in heat exchange ability due to the outside air and a reduction in reliability and stability due to fluctuations in the refrigeration cycle.

For this reason, measures were taken such as wrapping each part with insulating material, but the insulation was insufficient.
There were problems in that the work was difficult and took a long time, and the manufacturing cost was quite high.

[Means for solving problems]

The air conditioner according to this invention includes a machine room portion formed by a base plate on which a compressor is mounted, a plurality of pillars erected on the base plate, and a drain tray supported by the pillars; a non-use heat exchanger that is disposed on the drain pan and exchanges heat between the refrigerant supplied from the compressor and the air to be heat exchanged, and the pillar, the drain pan, and the non-use heat exchanger. An exterior strut that stands in contact with the exterior strut, a blower device that is attached to the top of the exterior strut, an inner tube through which the refrigerant supplied from the compressor passes, and an outer tube through which the fluid to be heat exchanged passes are integrated. A user-side heat exchanger formed into a cylindrical shape by winding the user-side heat exchanger, and refrigeration circuit components such as a low-pressure side accumulator and a liquid reservoir container housed in the inner space of the user-side heat exchanger. The above objective is achieved by configuring an air conditioner by integrally providing a user-side heat exchange part whose periphery is filled with a foamed heat insulating material.

[Effect]

In this invention, other components constituting the refrigeration circuit are placed in the inner space of the user-side heat exchanger, which is formed into a cylindrical shape by integrally winding the outer tube and the inner tube. By housing the liquid storage container, low-pressure side accumulator, etc., and creating a structure that can be sufficiently insulated by filling these parts with foam insulation material, fluctuations in the refrigeration cycle due to changes in ambient temperature and wind speed are eliminated, To obtain an air conditioner configured in a compact integrated form.

[Example of idea]

An embodiment of this invention will be described below.
Fig. 1 is an exploded perspective view of an air conditioner showing an embodiment of this invention, Fig. 2 is a plan view of the refrigeration circuit components etc. housed in the machine room of the air conditioner shown in Fig. 3 is a front view of the refrigeration circuit components shown in FIG. 2, and FIG. 4 is a refrigeration circuit diagram of the air conditioner shown in FIG. 1. FIG. 5 is a sectional view showing the configuration of the user-side heat exchanger. The air conditioner shown in Fig. 1 has a machine room part A, an unused side heat exchange part B,
It consists of an air blower C, a user-side heat exchange mounting part E housed in the machine room part A, and a casing part D. 2 is a base plate formed by bending the front, rear, left, and right ends of a relatively thick steel plate to form a dish-like shape as a whole; 3 is an L-shaped steel mounting foot planted in the four corners of this base plate 2; Each surface has a screw hole 3a. 2a
is a protrusion for positioning panels such as the side plate 30, 4-
Reference numeral 7 indicates four pillars formed by bending a relatively thick steel plate into an L-shape, and the lower end of each pillar 4 to 7 is attached to the mounting foot 3.
It has a bolt hole corresponding to the screw hole 3a of
Bolts are installed in the installation surfaces 4a to 7a formed at the upper end. Therefore, by overlapping the lower end of each support 4 to 7 with each mounting leg 3, inserting the bolt into the bolt hole and the screw hole 3a, and tightening, the lower end of each support 4 to 7 will be placed on the base plate 2. It is assembled integrally with the mounting foot 3 in a state in which it is in contact with the mounting surface 4.
The outline of the machine room portion A is formed by screwing the drain plate with the bolts installed in a to 7a. Reference numerals 8 and 9 are connection plates that respectively connect the supporting columns 4 and 5 and 6 and 7 that face each other on the front and rear sides of the machine room part A, and the connection plate 8 on the front side
has screw holes for holding and fixing the control panel 16 and further fixing the upper and lower front plates 28, 27. A cistern tank (not shown) is attached to the rear connecting plate 9. Reference numeral 10 denotes a compressor fixed with bolts on the front right side of the base plate 2, and this compressor 10 has a reinforcing plate (not shown) separately on the base plate 2 in order to reduce vibrations during operation. Mounted via. E is a user side formed into a cylindrical shape by integrally winding an inner tube through which the refrigerant supplied from the compressor 10 passes and an outer tube through which the fluid to be heat exchanged passes, into a coil shape. A heat exchanger 11 and refrigeration circuit components such as a liquid reservoir 13 and a low-pressure side accumulator 12 housed in the inner space of the user-side heat exchanger 11 are integrated and the surrounding area is filled with foam insulation material. This is the side heat exchanger part. This user-side heat exchange device portion E is located on the right side of the back surface of the machine room portion A, that is, at the rear of the compressor 10. 11a is an L-shaped water inlet pipe that communicates with the water circuit of the user side heat exchanger 11;
A circulation pump (not shown) for circulating the fluid to be heat exchanged can be connected to the inlet portion thereof. Reference numeral 11b denotes an outlet pipe that protrudes from the rear side. Therefore, the piping connection with the load side heat exchanger for air conditioning (not shown) is such that the fluid to be heat exchanged passes through the pump from the back side, passes through the outlet piping 11b of the user side heat exchanger 11, and is connected to the air conditioning load side heat exchanger (not shown) from the back side. connected to the load-side heat exchanger. Reference numeral 12 denotes a low-pressure accumulator housed in the inner space 11c of the user-side heat exchanger 11, which is formed into a cylindrical shape by being wound into a coil. 13 is also housed in the inner space 11c. This is a liquid storage container, and as shown in the figure, it is incorporated in the inner space 11c in a suspended state. 11d is a relatively thin steel plate member that covers the periphery of the user-side heat exchanger 11, and the portion surrounded by this member 11d is filled with foamed heat insulating material 11e to form an integrally molded heat insulating structure. Therefore, only the pipes 11a, 11b and the refrigerant pipe protrude from the member 11d that houses the user-side heat exchanger 11 and the like. Reference numerals 14 and 15 are a four-way valve and a throttle device, respectively, and a compressor 10 and a user-side heat exchanger 1 constitute a refrigeration circuit.
1. Connected to the low-pressure side accumulator 12 etc. by refrigerant piping. 16 is a refrigeration device and a blower 1
This is a control panel that houses contactors, relays, protection devices, etc. for controlling the operation of the 9, and is made of relatively thick steel plate. This control panel 16 is fixed to the column 4 and the connecting plate 8 on the front left side. 17 is a drain pan installed on the installation surfaces 4a to 7a of each support 4 to 7; 17a is a screw insertion hole provided on the left, right, and back sides of the drain pan; 17b is a series of holes formed on the inner peripheral edge of the drain pan 17; This horizontal installation surface 17b is provided with bolt holes. Reference numeral 17c denotes a reservoir (not shown) which is machined so that the depth of the drain pan becomes deeper from the front to the rear, and this reservoir has a drain outlet. Therefore, by inserting the bolts installed on the upper end surfaces 4a to 7a of each of the columns 4 to 7 into the bolt holes of the drain pan 17 configured in this way and tightening them with nuts, the drain pan 17 can be attached to each of the columns 4 to 7. will be supported by
In this way, the machine room portion A is formed.

Next, the non-use side heat exchanger portion B will be explained. 18 is L composed of a flat fin and a copper tube.
The non-use side heat exchangers are shaped like letters and are installed on the drain pan 17 to face each other. A side plate 18a is provided with a plurality of screw holes in the vertical direction, and the lower screw hole is aligned with a through hole provided in the side edge of the drain pan 17 and fixed with screws. The other screw holes come into contact with exterior supports, which will be described later, and are fixed with screws.

Next, the blower C will be explained. Reference numeral 19 denotes a blower consisting of a blade portion 19a and a motor portion 20; 21 represents a support member that supports the motor portion 20 so that the blade portion 19 is positioned above the motor portion 20; both ends thereof are bent into a letter shape; There is. The other end 21a of this support member 21 is fastened with eye bolts to screw holes drilled at the four corners of a fan casing 22 formed of a relatively thick steel plate. This eye bolt can be used to install an air conditioner, or to lift it during loading and unloading, and has both functions. The blower device C is composed of the blower 19, a support member 21, a fan casing 22, etc., and is installed as follows. Base plate 2 and this base plate 2
Four exterior columns 23 to 26 are brought into contact with the upper columns 4 to 7, the drain pan 17, and the side plate 18a of the non-use side heat exchanger 18, respectively, and are tightened with screws in alignment with the screw holes provided in each. The casing 22 of the blower 19 is inserted from the outside into the upper parts of the exterior supports 23 to 26 installed at the four corners and fixed with screws.

Next, the casing D will be explained. Front plates 27 and 28, and left and right side plates 29, respectively, correspond to the positioning protrusions 2a provided on the base plate 2.
A back plate 30 (not shown) is installed on the base plate 2 and fixed to the exterior supports 23 to 26 and the drain pan 17 with screws. Moreover, the upper front plate 28 is
Together with the lower front plate 27, the drain pan 17 is fixed by tightening screws into screw holes drilled in the connecting plate 8 at the front under the drain pan 17.

This completes the assembly of the air conditioner.

Next, the operation of the refrigeration cycle will be explained.
FIG. 4 is a diagram showing an embodiment of this invention.
32a to 32d are check valves, 33 is a dryer, 3
4 is a cooling capillary, 35 is a heating capillary, 36 is a solenoid valve, 37 is an electric expansion valve, and 38 is a throttle device.

First, to explain the case of cooling operation, compressor 1
The high temperature and high pressure gas refrigerant discharged from the four-way valve 1
4 to the non-use side heat exchanger 8, where the gas refrigerant is condensed by a blower 19 and becomes a high-pressure liquid refrigerant. The high-pressure liquid refrigerant passes through the check valve 32a to the dryer 33, the solenoid valve 36, and the electric expansion valve 3.
7. The pressure is reduced by the expansion device 38. On the other hand, the pressure is similarly reduced in the cooling capillary 34. The reduced pressure gas/liquid mixed refrigerant evaporates in the user-side heat exchanger 11, cools a fluid such as water supplied from the outside, and performs heat exchange. After heat exchange, the evaporated gas and liquid mixed refrigerant go to the low-pressure accumulator 12, the liquid goes to the bottom, and the gas goes to the piping 12 of the accumulator 12.
It returns to the compressor 10 from the four-way valve 14 through a.

The opposite is true for heating operation. That is, the high-temperature, high-pressure gas refrigerant discharged from the compressor 10 is supplied through the four-way valve 14 to the inner pipe 11g constituting the user-side heat exchanger 11, and the fluid such as water supplied to the outer pipe 11f is By exchanging heat with the refrigerant, it is condensed and becomes a high-pressure liquid refrigerant. The high pressure liquid refrigerant is in the liquid storage container 1.
3. The pressure is reduced by the throttle device 38 through the check valve 32b. On the other hand, the pressure is similarly reduced through the heating capillary 35.

This kind of refrigeration cycle operation for cooling and heating is repeated throughout the winter and summer, but in the case of the conventional device, heat radiation loss and condensation from the liquid storage container 13 occurred during the cooling operation, but with the configuration of this invention. If there is, the user side heat exchanger 11 is formed into a cylindrical shape by winding it into a coil shape, and the inner space 11 is formed into a cylindrical shape.
In addition to incorporating the accumulator 12 and liquid storage container 13 into f, the structure is such that these are integrally filled with foamed heat insulating material 11c to provide sufficient insulation, thereby eliminating dew condensation and heat radiation loss and allowing stable refrigeration cycle operation. We were able to obtain a refrigeration system that can do this.

[Effect of idea]

As explained above, this invention consists of a machine room portion formed by a base plate on which a compressor is mounted, a plurality of columns erected on this base plate, a drain tray supported by these columns, and a non-use side heat exchanger disposed on the drain tray and for exchanging heat between the refrigerant supplied from the compressor and the air to be heat exchanged; the above-mentioned pillar and the drain plate; and the above-mentioned non-use side heat exchanger. An exterior support that is erected in contact with the exterior support, an air blower that is attached to the top of the exterior support, an inner pipe through which the refrigerant supplied from the compressor passes, and an outer pipe through which the fluid to be heat exchanged passes are integrated. A user-side heat exchanger formed into a cylindrical shape by being rolled up, and refrigeration circuit components such as a low-pressure side accumulator and a liquid storage container housed in the inner space of the user-side heat exchanger. The air conditioner is configured by integrally providing a heat exchanger part on the user side with the surrounding area filled with foam insulation material, so even if there are fluctuations in ambient temperature or wind speed, the refrigeration cycle will not be affected. The impact is extremely small,
This has the effect that there is little heat radiation loss in the user-side heat exchanger and liquid storage container, and no condensation occurs on the surfaces during cooling operation.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of an air conditioner showing an embodiment of the invention, FIG. 2 is a plan view of refrigeration circuit components etc. housed in the machine room of the air conditioner shown in FIG. Fig. 3 is a front view of the refrigeration circuit components shown in Fig. 2, Fig. 4 is a refrigeration circuit diagram of the air conditioner shown in Fig. 1, and Fig. 5 is a sectional view showing the configuration of the user-side heat exchanger. It is. In the figure, 10 is a compressor, 2 is a base plate, 4 to 7
is the pillar, 17 is the drain plate, A is the machine room part, 1
8 is a non-use side heat exchanger, 23 to 26 are exterior struts,
C is a blower, 11g is an inner pipe, 11f is an outer pipe, 1
2 is a low pressure side accumulator, 13 is a liquid reservoir container,
11 is a heat exchanger on the user side, and E is a heat exchanger on the user side. In the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A machine room portion formed by a base plate on which a compressor is mounted, a plurality of columns erected on this base plate, and a drain tray supported by the columns; A non-use side heat exchanger that exchanges heat between the refrigerant supplied from the compressor and the air to be heat exchanged, an exterior support that is erected in contact with the above-mentioned support column, the above-mentioned drain plate, and the above-mentioned non-use side heat exchanger. , a blower device attached to the upper part of this exterior support, an inner tube through which the refrigerant supplied from the compressor passes, and an outer tube through which the fluid to be heat exchanged passes, are wound together to form a cylindrical cylinder. A user-side heat exchanger formed in the shape of a body, and refrigeration circuit components such as a liquid reservoir and a low-pressure side accumulator housed in the inner space of the user-side heat exchanger are integrally surrounded by foam insulation material. An air conditioner equipped with a user-side heat exchanger section filled with