JP2000314543A - Structure for fixing refrigerant pipeline - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the fixing structure of a refrigerant pipeline, which realizes simplification of mounting work of a heat transfer tube to a stay. SOLUTION: In a fixing structure, wherein a heat transfer tube 4 is fixed to the side surface of a stay 1 via a pipe holder 20, the stay 1 and the pipe holder 20 are formed integrally of a resin material. According to this constitution, when compared with a case where the heat transfer tube is supported by the combination of a stay made of SUS and an elastic retention type pipe holder, fixed by fitting the same into a holder receiving hole provided on the stay, for example, since the fitting work of the pipe holder into the holder receiving hole is not necessary, the forming work of the holder receiving hole on the stay is not necessary whereby the fixing work of the heat transfer tube 4 to the stay 1 is very much simplified, and working cost can be reduced. As a result, the substantial reduction in the manufacturing cost of a heat exchanger equipped with such a fixing structure of refrigerant pipeline, can be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for fixing a refrigerant pipe.

[0002]

2. Description of the Related Art FIG. 11 shows a system configuration of a conventional general thermal storage type air conditioner. This heat storage type air conditioner comprises a heat storage tank 41 provided with a heat storage heat exchanger 40 described below, an outdoor heat exchanger 42, an indoor heat exchanger 43, and a compressor 44 to constitute a refrigerant circulation system. When the cooling / heating load is small, the heat or heat stored in the heat storage tank 41 is stored in the heat storage tank 41 when the cooling / heating load is large, while the cooling or heating is stored in the heat storage tank 41 by evaporation and condensation of the refrigerant in the heat storage heat exchanger 40. It is used as a heat source for evaporation and condensation.

The heat storage heat exchanger 40 arranged in the heat storage tank 41 is, as shown in FIG.
A pair of upper and lower stays 2 and 2 (illustration of a lower stay) is shown in FIG. The refrigerant pipe unit 44 is configured to be mounted across the space between the refrigerant pipe units 44, and a plurality of refrigerant pipe units 44, 44,... To the casings 3 and 3 at predetermined intervals.

In this case, conventionally, both the stay 2 and the casing 3 are made of metal (for example, made of SUS), and the end of the stay 2 and the casing 3 are fixed with fixing screws 37 to fix both of them. On the other hand, the support of the heat transfer tube 4 to the metal stay 2
Are formed on the side wall 2a of the heat transfer tube 4 at positions corresponding to the heat transfer tube 4, respectively. At each position of the heat transfer tube 4, an elastically fastened tube holder 36 is mounted. This is realized by elastically fitting the tube holder 36 into the holder receiving hole 35.

[0005]

However, the support of the heat transfer tubes 4 to the stays 2 as described above is performed by the tube holders 3 arranged at respective portions corresponding to the both.
6, the tube holder 36
Since the number of arrangements is large, a large number of man-hours are required for the work of piercing the holder receiving hole 35 in the stay 2 and the work of inserting and fixing the tube holder 36 in the holder receiving hole 35, and as a result, the heat storage type heat There was a problem that the manufacturing cost of the exchanger was high.

SUMMARY OF THE INVENTION Accordingly, it is a main object of the present invention to propose a structure for fixing a refrigerant pipe which can simplify the operation of attaching a heat transfer tube to a stay and reduce manufacturing costs.

[0007]

Means for Solving the Problems In the present invention, the following configuration is adopted as specific means for solving such problems.

According to the first aspect of the present invention, in the fixing structure of the refrigerant pipe for fixing the heat transfer tube 4 to the side surface of the stay 1 via the tube holder 20, the stay 1 and the tube holder 20 are fixed.
Are integrally formed of a resin material.

According to a second aspect of the present invention, in the refrigerant pipe fixing structure according to the first aspect, the heat transfer tube 4 is formed into a hairpin shape or a meandering shape in which a plurality of the heat transfer tubes are connected, while the tube holder 20 is formed. Is a pair of right and left through holders 2 that hold the straight tube portion 4b of the heat transfer tube 4 in a penetrating state.
1 and 22, and bearing holders 23 and 24 positioned between the pair of through holders 21 and 22 to support the curved tube portion 4a of the heat transfer tube 4 from outside in the curvature direction. .

[0010] In the third aspect of the present invention, the first or second aspect is provided.
In the refrigerant pipe fixing structure according to the invention, both ends 1a, 1b of the stay 1 are supported by the casings 3, 3, respectively.
A claw member provided with a pin 26 protruding from the abutment surface 33 and a claw portion 18b extending outward from an end of the abutment surface 33 at a predetermined distance from the abutment surface 33. And the supporting surface 34 of the casing 3
Has a pin hole 3 into which the pin 26 of the stay 1 is fitted.
1 and a hook portion 3 on which the hook portion 18b of the hook member 18 is hooked
8, the abutment surface 33 of the stay 1 is abutted against the support surface 34 of the casing 3, the pin 26 is fitted into the pin hole 31, and the claw portion 18 b is engaged with the engagement portion 38. It is characterized by stopping.

In a fourth aspect of the present invention, in the refrigerant pipe fixing structure according to the third aspect, the pin 26
It is characterized in that a stopper member 27 for preventing the pin 26 from being detached from the pin hole 31 by engaging with the peripheral portion of the pin hole 31 is attached.

In a fifth aspect of the present invention, in the refrigerant pipe fixing structure according to the third aspect of the present invention, of the pair of left and right through holders 21 and 22 of the pipe holder 20 provided on the stay 1, 1 is characterized in that a through-hole 22b projecting below the abutment surface 33 is provided on the through holder 22 located near the end of the first holder.

[0013] In the sixth aspect of the present invention, the first or second aspect is provided.
In the refrigerant pipe fixing structure according to the present invention, the stay 1 is provided with a pair of side walls 11,
12 and a bottom wall portion 13 that connects them to each other at the lower end thereof, has a substantially rectangular cross-sectional shape whose upper surface is open, and has a predetermined axial position between the pair of side wall portions 11 and 12. The present invention is characterized in that straddling reinforcing ribs 14 and 16 are provided.

A seventh aspect of the present invention is characterized in that in the refrigerant pipe fixing structure according to the sixth aspect, drain holes 29 are provided in the bottom wall portion 13.

According to an eighth aspect of the present invention, in the refrigerant pipe fixing structure according to the sixth aspect, a vertical dimension and a width dimension in a cross section of the stay 1 are set to be substantially the same. .

[0016]

According to the present invention, the following effects can be obtained by adopting such a configuration.

According to the refrigerant pipe fixing structure according to the first aspect of the present invention, the heat transfer tube 4 is fixed to the side surface of the stay 1 via the tube holder 20.
And the tube holder 20 are integrally formed of a resin material, so that, for example, a conventional SUS stay and an elastic fastening type tube holder fitted and fixed in a holder receiving hole provided in the stay are provided. Compared with the configuration in which the heat transfer tube is supported by the combination, the work of fitting the tube holder into the holder receiving hole is unnecessary, and the work of forming the holder receiving hole in the stay is not required. The operation of fixing the heat transfer tube 4 to the heat transfer tube 1 is extremely simplified, and the operation cost can be reduced. As a result, the production cost of the heat exchanger having the refrigerant pipe fixing structure can be significantly reduced. .

According to the refrigerant pipe fixing structure of the second aspect of the present invention, in addition to the effects described above, the following specific effects can be obtained. That is, in the present invention, the heat transfer tube 4 is formed into a hairpin shape or a meandering shape in which a plurality of the heat transfer tubes 4 are continuous, while the tube holder 20 holds the straight tube portion 4b of the heat transfer tube 4 in a penetrating state. A pair of through holders 21 and 22, and a support holder 2 positioned between the pair of through holders 21 and 22 to support the curved tube portion 4a of the heat transfer tube 4 from the outside in the curvature direction.
3, 24.

Therefore, the stays 1 are arranged in upper and lower stages, and the support holders 23,
24 supports the lower curved tube portion 4a of the heat transfer tube 4 from below, while holding the straight tube portion 4b on the upper side of the heat transfer tube 4 by the through holders 21 and 22 of the upper stay 1. The heat transfer tube 4 is reliably supported in both the vertical direction and the direction in which the heat transfer tube 4 comes into contact with and separates from the stay 1, thereby ensuring high reliability in the support.

Further, in the lower stay 1 of the pair of stays 1, 1 arranged in the upper and lower stages, the support holders 23, 2 of the respective components of the tube holder 20 are provided.
4, the through holders 21 and 22 are not used. On the other hand, in the upper stage 1, only the through holders 21 and 22 are used and the support holders 23 and 24 are not used. The use of the penetrating holders 21 and 22 or the supporting holders 23 and 24 which are not used does not affect the support of the heat transfer tube 4 at all. The stay 1 can be used as both the upper stage stay and the lower stage stay, and further cost reduction can be expected by reducing the required number of parts.

According to the refrigerant pipe fixing structure of the third aspect of the present invention, in addition to the above-described effects, the following specific effects can be obtained. That is, in the present invention, both ends 1a and 1b of the stay 1 are supported by the casings 3 and 3, respectively, and the abutment surfaces 33 and 33 of the both ends 1a and 1b of the stay 1 The pin 26 projecting from the surface 33 and the abutment surface 3
Claw portion 18b extending outward from the end portion with a predetermined distance from 3
And a claw member 18 provided with a support member 34. On the support surface 34 of the casing 3, the pin 2 of the stay 1 is provided.
And a claw portion 18b of the claw member 18.
And a catching portion 38 on which the abutment surface 33 of the stay 1 abuts against the support surface 34 of the casing 3 and the pin 26 is fitted into the pin hole 31 and the claw portion 18b is provided. Is hooked on the hook portion 38.

Therefore, the abutment surface 33 of the stay 1 abuts on the support surface 34 of the casing 3 and the pin 2
6 into the pin hole 31 and the claw 18
b is hooked on the hook 38 so that the pin 26
The pin hole 31 into which the pin 1 is fitted engages with each other in the plane direction of the pin hole 31, thereby positioning the stay 1 with respect to the casing 3 in the plane direction, and at the same time, When the claw portion 18b of the claw member 18 is hooked on the hook portion 38 on the casing 3 side, the separating operation of the stay 1 from the casing 3 is regulated, and the pin 26 comes out of the pin hole 31. Is prevented, and as a result, the fixing performance of the stay 1 to the casing 3 is favorably maintained.

According to the refrigerant pipe fixing structure of the fourth invention of the present application, in the refrigerant pipe fixing structure of the third invention, the pin 26 engages with the peripheral edge of the pin hole 31. Since the stopper member 27 for preventing the pin 26 from coming off from the pin hole 31 is attached, for example, when the space between the pair of left and right casings 3 is fixed (for example, In a case where both ends of the pair of casings 3 and 3 are connected to each other by a SUS stay to form an integral rigid frame, the thermal expansion between the resin stay 1 and the SUS stay Due to the difference or the vibration during transportation, etc., the stay 1 is relatively displaced with respect to the casing 3 so that the claw portion 18b of the claw member 18 on the stay 1 side is moved to the case. Even when the stopper member 27 provided on the pin 26 engages with the peripheral edge of the pin hole 31, even if the stopper 3 is easily detached from the engaging portion 38 on the side of the ring 3, the stay 3 can be removed from the casing 3 of the stay 1. Is reliably prevented from being detached, and the reliability of fixing both of them is further enhanced. The effect as described above by providing the stopper member 27 becomes more remarkable when applied to a heat storage type heat exchanger having a large temperature change.

According to the refrigerant pipe fixing structure of the fifth aspect of the present invention, the following specific effects can be obtained in addition to the effects described above. That is, according to the present invention, of the pair of left and right through holders 21 and 22 of the tube holder 20 provided on the stay 1, the through holder 22 located closer to the end of the stay 1 is more than the abutment surface 33. Since the protruding portion 22 b protruding downward is provided, the straight tube portion 4 of the heat transfer tube 4 penetrated by the penetrating holder 22 is held.
b indicates that even if the stay 3 is close to the casing 3 that supports the end of the stay 1 and the stay 1 relatively moves in the direction approaching the casing 3 due to vibration or the like, the protrusion of the through holder 22 Since the movement of the casing 3 is prevented by the portion 22b, it is possible to prevent the casing 3 from contacting and damaging the straight pipe portion 4b of the heat transfer tube 4 in advance.

According to the refrigerant pipe fixing structure of the sixth aspect of the present invention, the following specific effects can be obtained in addition to the effects described above or above. That is, in the present invention, the stay 1 is formed in a substantially rectangular cross-sectional shape having an open top surface having a pair of side wall portions 11 and 12 facing each other at a predetermined interval and a bottom wall portion 13 connecting these at their lower ends. At the same time, at a predetermined position in the axial direction, a reinforcing rib 14 extending between the pair of side wall portions 11 and 12 is provided.
Since the stays 16 are provided, the stays 1 can be deformed by the reinforcing ribs 14 and 16 even though the stays 1 are made of a resin material and have a relatively low-rigidity structure having a substantially rectangular cross section with an open upper surface. As a result, the weight and cost of the stay 1 are reduced and the strength of the stay 1 is secured.

According to the refrigerant pipe fixing structure of the seventh aspect of the present invention, the following specific effects can be obtained in addition to the effects described above. That is, in the present invention, since the bottom wall portion 13 is provided with the drain holes 29, 29,..., The stay 1 has a substantially rectangular cross-sectional shape whose upper surface is open, and the side wall portions 11, Even if it has a structure of a plurality of small chambers divided by the reinforcing ribs 14 and 16 provided straddling between the 12, the water collected in the small chambers is discharged from the drain holes 29, 29,. For this reason, for example, it is reliably prevented that water accumulates in the small chamber and causes odor.

According to the refrigerant pipe fixing structure of the eighth aspect of the present invention, the following specific effects can be obtained in addition to the effects described above. That is, according to the present invention, the vertical dimension and the width dimension in the cross section of the stay 1 are set to be substantially the same. Therefore, when the stay 1 is reinforced by the reinforcing ribs 14 and 16, for example, the vertical dimension is used. The reinforcing effect by the reinforcing ribs 14 and 16 becomes more remarkable as compared with the case where there is a large difference between the width and the width dimension, and the strength performance of the stay 1 is further enhanced accordingly.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be specifically described based on preferred embodiments. FIG. 1 shows a refrigerant pipe unit X configured by applying the refrigerant pipe fixing structure according to the present invention. This refrigerant piping unit X
As described later (see FIG. 3), a plurality of the heat storage heat exchangers of the regenerative air conditioner are constituted by installing a plurality of the heat exchangers at predetermined intervals. And a pair of 4 and 4 having a meandering shape in which the hairpin shape is continuous in the lateral direction.

The stay 1 is a girder formed integrally with a resin material (for example, polypropylene).
As shown in FIG. 2, a stay body 10 is provided.
The stay main body 10 has a basic rectangular shape in which the upper surface side is opened by a pair of side wall portions 11 and 12 facing each other at a predetermined interval and a bottom wall portion 13 continuous with the lower ends thereof. In this basic form, ribs 14 are provided so as to extend between the side walls 11 and 12 at positions near both ends 1a and 1b, and the side walls are provided between the ribs 14 and 14. Ribs 15, 15 extending substantially in parallel with 11, 12 are provided.
A plurality of ribs 16 are provided at predetermined intervals to extend between the side wall portions 11 and 12 through the interposition of the ribs 6 and 16 (in this embodiment, the ribs 14 and the ribs 16 are referred to as “reinforcing” in the claims. Ribs)). As shown in FIGS. 2 and 4, drain holes 29 are provided in the bottom wall portion 13 at portions corresponding to the small chamber spaces surrounded by the ribs 14 to 16 and the side wall portions 11 and 12, respectively. , 29,... Are provided.

On the other hand, portions of the bottom wall portion 13 corresponding to the left and right ends 1a and 1b of the stay 1 are portions fixed to a casing 3 described later.
3, 33. And both ends 1 of this stay 1
The abutment surfaces 33, 33 set to a, 1b are provided with a claw member 18 and a pin 26, respectively, described below.

As shown in FIGS. 2, 4 and 6, the claw member 18 has an opening 1 formed in the abutment surface 33.
7, which is bent in an inverted “U” shape from the inner edge of the opening 17, and the tip of which protrudes toward the lower surface of the abutment surface 33 through the opening 17. Arm 18a having a restoring force;
And a claw having a substantially wedge-shaped cross section that extends obliquely upward continuously from the lower end of the abutment surface 33 and is slightly below the lower surface of the abutment surface 33 (specifically, about the plate thickness of a casing 3 described later). A portion 18b.

As shown in FIGS. 2, 4 and 5, the pin 26 is formed of a shaft having a predetermined length.
At the side position of the opening 17 in a state in which one end side protrudes from the abutment surface 33 to the lower surface side. The pin 26 is fixed to the abutment surface 33 by insert molding in which the other end portion is buried in a resin material when the stay 1 is molded. Also,
In this case, the lower surface of the abutment surface 33 is
A nut seat 28 is provided which bulges to the back side by a predetermined dimension around the nut. The height dimension of the nut seat 28 is set to a dimension larger by a predetermined dimension than the plate thickness of the casing 3 described later. Further, a push nut 27 (corresponding to a “stopper member” in the claims) is provided at one end of the pin 26 protruding from the nut seat 28 to the back side of the abutment surface 33. It is mounted in a state where its upper surface is in contact.

[0033] Incidentally, the nut seat 28, as described later, only provided when applied to the refrigerant pipe unit X constituting the heat storage heat exchanger Z ₁ according to the first embodiment, the second not provided when applied to the refrigerant pipe unit X constituting the heat storage heat exchanger Z ₂ according to the embodiment. That is, in this case, as shown in FIG. 10, one end of the pin 26 directly protrudes from the lower surface of the abutment surface 33.

On the other hand, as shown in FIGS. 1 and 2, the tube holder 20 is formed integrally with the stay 1 at both side walls 11, 12 at predetermined intervals. And the penetrating holders 21 and 22 described below.
And bearing holders 23 and 24.

As shown in FIGS. 2, 4 and 7, both of the penetrating holders 21 and 22 have a substantially C shape with an open end.
It has holding portions 21a and 22a for holding the straight tube portion 4b of the heat transfer tube 4 in a penetrating state, and the straight tube portion 4b elastically deforms the opening portion. And inserted into and removed from the holding portions 21a and 22a. The pair of penetrating holders 21 and 22 are provided at the lower end portions of the side wall portions 11 and 12 with a predetermined size in the longitudinal direction of the side wall portions 11 and 12 (specifically, a straight line adjacent to the heat transfer tube 4). It is provided in a state of being separated only by the distance between the pipe portions 4b.

The above-mentioned bearing holder 23 and bearing holder 24
Are used to support the lower curved tube portion 4a of the heat transfer tube 4 from below, and are shown in FIGS.
As shown in the figure, the support holder 23 is provided with the curved pipe portion 4a.
The left side of the support holder 24 is connected to the curved tube portion 4a.
The right part of each is shared. For this reason, the support portions 23a and 24a provided on the support holders 23 and 24, respectively, have their bottom surfaces (that is, support surfaces) inclined in the opposite direction (see FIG. 7), and the support portions 23a and 24a are The holding portions 21a, 22 of the pair of through holders 21, 22 in plan view.
It is located on a straight line connecting the centers of a.

Further, both side walls 11, 1 of the stay 1 are provided.
2, each of the tube holders 20, 20,
A tube holder 20 provided on the side wall 11 side and near the other end 1b of the stay 1 and a tube holder 20 provided on the side wall 12 side and near one end 1a of the stay 1 (Not shown), a pair of left and right through holders 21 and
2, among the through holders 22 located near the outer end,
Projecting portion 22 projecting below the lower surface of bottom wall portion 13
b (see FIGS. 2 and 7). The height dimensions of the other through holders 21 and 22 of each of the tube holders 20 are set such that the lower ends thereof substantially coincide with the lower surface of the bottom wall portion 13 (see FIGS. 2 and 7). ).

Next, an operation procedure and the like in the case where the pair of heat transfer tubes 4 and 4 are attached to the pair of upper and lower stays 1 and 1 to form the refrigerant piping unit X will be described with reference to FIG. explain.

First, a pair of the stays 1 and 1 are arranged facing each other at a predetermined interval in the vertical direction. In this case, both of the stays 1 and 1 have their upper surfaces (surfaces on the opening side) facing upward, and each of the two tube holders 2.
Are positioned and arranged so that 0, 20,... Overlap in the vertical direction. That is, the stay 1 of the same use is also used as the upper stage stay and the lower stage stay.

Next, the meandering heat transfer tubes 4, 4 are attached to the stays 1, 1 side. That is, for example, the heat transfer tubes 4 attached to the side walls 11, 11 of the stays 1, 1 will be described. The three lower curved tube portions 4a, 4a, 4a of the heat transfer tubes 4 are respectively connected to the lower stays 1 of the lower stage 1. Bearing holders 23, 24 of each tube holder 20, 20,.
And straight pipe portions 4 at both left and right ends of the heat transfer tube 4.
b, 4b and straight pipe portions 4b, 4 immediately below the upper curved pipe portion 4a.
b, .. each tube holder 2 of the upper stage 1
0, 20,... Corresponding to the above through holders 21, 22
To each other. In the same procedure, the other heat transfer tube 4 is attached to the side wall portions 12, 12 of the stays 1, 1. As described above, the refrigerant pipe unit X including the pair of upper and lower stays 1 and the heat transfer tubes 4 and 4 attached to the stays 1 and 2 is configured.

The refrigerant pipe unit X thus configured constitutes the above heat storage heat exchanger by arranging a plurality of the refrigerant pipe units X. When the heat storage heat exchanger is formed, the following will be described. Of the casing 3 is used. Hereinafter, a specific structure of the casing 3 will be described.
Two embodiments of the heat exchanger for heat storage constituted by using the refrigerant piping unit X will be described.

Casing 3 As shown in FIG. 3, the casing 3 is made of a SUS member having a substantially "U" -shaped cross section. The casing 3 is used with one flange 3a facing upward (that is, used for supporting the end of the stay 1).
At a predetermined interval in the length direction (specifically, the rib 1
Pin holes 31 and 3 composed of round holes
1, ... are formed.

A pin hole 31 provided in the casing 3
In FIG. 8, a large-diameter pin hole 31 as shown by a solid line in FIG. 8 and a small-diameter pin hole 31 as shown by a chain line in FIG. 8 are selectively formed. The large-diameter pin hole 31 is provided in the first
Be one that is applied according to the heat storage heat exchanger Z ₁ to the embodiment, is set to a larger size by a predetermined dimension than the outer diameter of the push nut 27 which is mounted on the pin 26. The pin hole 31 of small diameter, there is applied according to the heat storage heat exchanger Z ₂ in the second embodiment, it is set to a larger size by a predetermined dimension than the outer diameter of the pin 26.

The flange 3a, on which the pin hole 31 is formed, is to which the stay 1 is attached, and is hereinafter referred to as a "support surface 34". The end 3b of the flange 3a is a portion where the claw member 18 on the stay 1 is hooked, and is hereinafter referred to as a "hook portion 38".

Subsequently, the heat storage heat exchanger Z _{1 according} to the _first embodiment and the heat storage heat exchanger Z _{2 according} to the second embodiment, which are constituted by using the casing 3 and the refrigerant piping unit X, are described. Will be described.

The heat storage heat exchanger Z ₁ 3, the heat storage heat exchanger according to a first embodiment device Z ₁
In a plan view.

The heat storage heat exchanger Z ₁ is used as a large-sized heat storage heat exchanger, and it is necessary to maintain high rigidity of the heat storage heat exchanger Z ₁ as a whole. . Therefore, in this heat storing heat exchanger Z ₁ is
The refrigerant pipe unit X described above and a refrigerant pipe unit Y having a conventional structure, that is, a SUS stay 2 as shown in FIG.
The heat transfer tubes 4 and 4 are fixed to the front and rear surfaces of the heat transfer tubes 4 and 4 via tube holders 36, respectively.

That is, the refrigerant pipe units Y, Y are arranged at both ends of a pair of casings 3, 3 arranged in parallel at a predetermined interval, respectively, and the refrigerant pipe units Y, Y are arranged inside the refrigerant pipe units Y, Y at a predetermined interval. The piping units X are arranged and arranged.

As described above, since the stay 2 is made of SUS, the refrigerant pipe unit Y is disposed so as to straddle between the pair of casings 3 and 3, and both are fixed to the fixing screws 37. (See FIG. 7), the stays 2 of the pair of refrigerant pipe units Y, Y
2 and the pair of casings 3 and 3 constitute a rectangular frame having high rigidity. Each of the refrigerant piping units X, X,... Is attached to the frame body having high rigidity.

When attaching the refrigerant pipe unit X to the casings 3 and 3, as shown in FIGS. 1 and 4, each of the bumps formed at both ends of the stay 1 of the refrigerant pipe unit X is used. The mating surfaces 33 are brought into abutment on the support surface 34 of the casing 3 so as to correspond to the pin holes 31. Then, in this abutting state, as shown in FIG. 5, the pins 26 on the stay 1 side are fitted into the pin holes 31 on the casing 3 side. In this case, the push nut 27 attached to the pin 26 is located on the back side of the support surface 34 through the pin hole 31, and the push nut 27 is vertically positioned with respect to the peripheral portion of the pin hole 31. It can be engaged. On the other hand, as shown in FIGS. 4 and 6, the claw member 18 on the stay 1 side is hooked from a lower inside to the hooking portion 38 of the casing 3. Therefore, both ends 1a and 1b of the stay 1 of the refrigerant piping unit X are
The pins 26, 26 and the pin holes 31, 31 perform positioning in the planar direction, and the claw members 18 on the stay 1 side and the hooks 3 on the casing 3 side.
8, relative movement in the separation direction, ie,
The pin hole 31 of the pin 26 is prevented from coming off, and the stay 1 (that is, the refrigerant piping unit X) is fixedly supported by the casings 3 and 3 by both functions.

By the way, the heat storage heat exchanger Z ₁ in the heat-storage tank, for example because the temperature changing in a temperature range of -20 ° C. to 70 ° C., especially as the thermal storage heat exchanger Z _1, S
In the configuration in which the refrigerant pipe units Y and Y each having the SUS stay 2 at both ends of the US casings 3 and 3, the resin-made stay 1 and the refrigerant of the refrigerant pipe unit X are used. The difference in thermal expansion between the piping unit Y and the SUS stay 2 becomes a problem. Further, the casings 3 and 3 and the stays 2 and 2 of the refrigerant piping units Y and Y are provided.
When both are made of SUS, while the distance between the pair of left and right casings 3 is always kept constant, for example, the refrigerant piping unit X There is also a problem of relative movement with respect to 3 and 3.

That is, as shown in FIG. 5, the nut seat 28 on the stay 1 side is fitted into the pin hole 31 on the casing 3 side. And this nut seat 28
Is gradually abraded when the stay 1 and the casing 3 relatively move due to, for example, vibration, and finally disappears. Therefore, in that state, the pin 26
A relatively large gap is formed between the pin 26 and the pin hole 31, and the pin 26 is in a state in which the pin 26 can largely move in the pin hole 31. On the other hand, when the stay 1 and the casing 3 relatively move relatively in this way, the claw member 1
The hook allowance between the claw portion 18b of No. 8 and the above-mentioned hook portion 38 changes,
In some cases, these hooked states are released, and the stay 1
It is also conceivable that the pin 26 comes off from the pin hole 31 when the casing 3 and the casing 3 are separated from each other. However, in this embodiment, as described above, the pin 2
Since the push nut 27 is mounted on the push nut 6, even if the hooking action of the claw member 18 is reduced and the wobble state disappears, the push nut 27 may be removed.
The movement of the stay 1 and the casing 3 away from each other is regulated by the latching action of, and the pin 26 is reliably prevented from falling out of the pin hole 31. As a result, regardless of the thermal expansion difference or vibration during transportation or the like, the fixed state to the casing 3, 3 of the refrigerant pipe unit X is satisfactorily maintained, by extension of the heat storing heat exchanger Z ₁ Reliability is improved.

[0053] The heat storing heat exchanger Z ₂ 9, regenerative heat exchanger according to the second embodiment device Z ₂
In a plan view. This heat exchanger for heat storage Z
Numeral ₂ is used as a relatively small heat storage heat exchanger, and is formed by arranging a plurality of the refrigerant piping units X at predetermined intervals so as to straddle a pair of left and right casings 3 and 3. Have been. In addition, each said refrigerant | coolant piping unit X,
X, since a fixed structure between ... and the casing 3, 3 is the same as that of the heat storing heat exchanger Z ₁ is omitted.

Thus, the heat storage heat exchanger Z_TwoIn
Are connected to both ends of a plurality of refrigerant piping units X, X,.
Each of the casings 3, 3 is attached
Therefore, the thermal expansion of the stay 1 of the refrigerant piping unit X
The effect depends on whether the refrigerant pipe unit X and the casing 3 are fixed.
It does not reach the fixed part. For this reason, the heat storage heat exchanger Z _Two
In the refrigerant piping unit X applied to FIG.
As shown, the nut seat 28 and the nut seat 28
Even if the push nut 27 is not provided, the claw portion
The locking action between the material 18 and the locking portion 38 causes the pin
26 is securely prevented from coming out of the pin hole 31.
The above heat exchanger Z for heat storage_TwoGood reliability is maintained
There is.

Next, specific effects and the like based on a configuration other than the above will be described.

(1) In the refrigerant pipe unit X, the heat transfer tubes 4 are provided on the side surface of the stay 1 via the tube holder 20.
Since the stay 1 and the tube holder 20 are integrally formed of a resin material, for example, the stay 1 is fitted and fixed in a SUS stay and a holder receiving hole provided in the SUS stay, as in the related art. Compared with a configuration in which a heat transfer tube is supported by a combination with an elastically fastened tube holder, the work of fitting the tube holder into the holder receiving hole is unnecessary, and the work of forming the holder receiving hole in the stay is also unnecessary. Is unnecessary, the operation of fixing the heat transfer tube 4 to the stay 1 is extremely simplified, and the operation cost can be reduced.

(2) Since the stay 1 in the refrigerant piping unit X is used in common with the refrigerant piping unit X disposed on the upper stage and the refrigerant piping unit X disposed on the lower stage, The number of parts required to configure the piping unit X can be reduced, and the cost reduction of the refrigerant piping unit X is further promoted.

(3) In the refrigerant pipe unit X, as shown in FIG. 7, of the pair of left and right through holders 21 and 22 of the pipe holder 20 provided on the stay 1, the end of the stay 1 Penetration holder 2 located closer
2 a projection 22b projecting below the abutment surface 33
Is provided, the straight pipe portion 4b of the heat transfer tube 4 penetrated and held by the penetrating holder 22 is connected to the stay 1
Even if the stay 1 is close to the casing 3 that supports the end of the casing 3 and the stay 1 is relatively moved in the direction approaching the casing 3 due to vibration or the like, the casing 3 is Since the movement is prevented, the casing 3 is prevented from coming into contact with and damaging the straight pipe portion 4b of the heat transfer tube 4 in advance.

(4) In the refrigerant pipe unit X, as shown in FIG. 2, the stay 1 is made up of a pair of side wall portions 11 and 12 facing each other at a predetermined interval and a bottom wall portion connecting these at their lower ends. 13, and a reinforcing rib 14, 16 bridging between the pair of side wall portions 11, 12 is provided at a predetermined position in the axial direction thereof. Therefore, despite the fact that the stay 1 is made of a resin material and has a relatively low-rigidity structure having a substantially rectangular cross section with an open upper surface, the deformation is suppressed as much as possible by the ribs 14 and 16. And
As a result, the weight and cost of the stay 1 are reduced, and the strength of the stay 1 is secured.

[Brief description of the drawings]

FIG. 1 is a perspective view of a refrigerant piping unit to which a fixing structure according to the present invention is applied.

FIG. 2 is a structural explanatory view of a resin stay shown in FIG.

FIG. 3 is a plan view showing a first embodiment of a heat storage tank heat exchanger configured by adding a predetermined number of the refrigerant piping units shown in FIG.

FIG. 4 is an enlarged view of an “IV” part in FIG. 3;

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is a sectional view taken along line VI-VI of FIG. 4;

FIG. 7 is a view taken along the line VII-VII in FIG. 4;

8 is a perspective view of a main part of the casing shown in FIG.

9 is a plan view showing a second embodiment of the heat exchanger for a heat storage tank configured by adding a predetermined number of the refrigerant pipe units shown in FIG. 1. FIG.

FIG. 10 is a sectional view showing a fixing structure of a stay end in the heat exchanger of FIG. 9;

FIG. 11 is a system diagram of a regenerative air conditioner.

FIG. 12 is a perspective view showing a conventional general structure for fixing a refrigerant pipe.

[Explanation of symbols]

1 and 2 are stays, 3 is a casing, 4 is a heat transfer tube, 10
Is a stay body, 11 is a side wall, 12 is a side wall, 13 is a bottom wall, 14 to 16 are ribs, 17 is an opening, 18 is a claw member,
20 is a tube holder, 21 and 22 are through holders, 23
And 24 are bearing holders, 26 is a pin, 27 is a push nut, 28 is a nut seat, 29 is a drain hole, 31 and 32
Is a pin hole, 33 is an abutment surface, 34 is a support surface, 35 is a holder receiving hole, 36 is a tube holder, 37 is a fixing screw, 38 is a hook, 41 is a heat storage tank, 42 is an outdoor heat exchanger, 43 the indoor heat exchanger, X is a refrigerant pipe unit, Y is a refrigerant pipe unit, Z ₁ and Z ₂ are the thermal storage heat exchanger.

Claims (8)

[Claims] 1. A tube holder (2) is provided on the side of a stay (1).
0) A fixing structure of a refrigerant pipe for fixing the heat transfer tube (4) via the heat transfer tube (4), wherein the stay (1) and the tube holder (20) are integrally formed of a resin material. Fixed structure of the refrigerant pipes. 2. The heat transfer tube (4) according to claim 1, wherein the heat transfer tube (4) is in a hairpin shape or a meandering shape in which a plurality of the heat transfer tubes are continuous, and the tube holder (20) is in direct contact with the heat transfer tube (4). A pair of left and right through holders (21) and (22) for holding the pipe portion (4b) in a penetrating state;
1) and (22), which are provided with bearing holders (23) and (24) for supporting the curved tube portion (4a) of the heat transfer tube (4) from outside in the direction of curvature thereof. The fixed structure of the refrigerant pipe. 3. The stay (1) according to claim 1, wherein both ends (1a) and (1b) of the stay (1) are supported by casings (3) and (3), respectively. ), A pin (26) projecting from the abutment surface (33) and a pin (26) protruding from the abutment surface (33) at each of the abutment surfaces (33) and (33) A claw member (18) provided with a claw portion (18b) extending outward from the end portion at a predetermined distance from each other, while the support surface (34) of the casing (3) is provided with the stay ( 1) Pin hole (31) into which the pin (26) is fitted.
And a hook portion (38) for hooking a hook portion (18b) of the hook member (18). The stay (1) has an abutting surface (33) formed on the casing (3). The casing (3) is brought into contact with the support surface (34), the pin (26) is fitted into the pin hole (31), and the claw (18b) is hooked on the hook (38). A) a fixing structure for a refrigerant pipe, which is supported by the above. 4. The pin (26) according to claim 3, wherein the pin (26) is engaged with a peripheral portion of the pin hole (31) to prevent the pin (26) from being detached from the pin hole (31). A structure for fixing a refrigerant pipe, wherein a stopper member (27) for blocking is attached. 5. The tube holder (20) according to claim 3, wherein the tube holder (20) provided on the stay (1).
Of the pair of left and right through holders (21) and (22),
A penetrating holder (2) located near the end of the stay (1)
2) A structure for fixing a refrigerant pipe, wherein a projection (22b) projecting downward from the abutment surface (33) is provided. 6. The bottom wall portion (13) according to claim 1, wherein the stay (1) has a pair of side wall portions (11) and (12) opposed to each other at a predetermined interval, and a bottom wall portion connecting these at their lower ends. And a reinforcing rib (14) extending between the pair of side walls (11) and (12) at a predetermined position in the axial direction thereof. 16) A structure for fixing a refrigerant pipe, wherein the structure is provided. 7. The drainage hole (29) according to claim 6, wherein the bottom wall (13) has drain holes (29), (29),.
A structure for fixing a refrigerant pipe, characterized by being provided with: 8. The refrigerant pipe fixing structure according to claim 6, wherein the stay (1) has a vertical dimension and a width dimension substantially the same in a cross section thereof.